CN109184993A - The variable electric-controlled fuel injector of fuel injection characteristic - Google Patents
The variable electric-controlled fuel injector of fuel injection characteristic Download PDFInfo
- Publication number
- CN109184993A CN109184993A CN201810834498.XA CN201810834498A CN109184993A CN 109184993 A CN109184993 A CN 109184993A CN 201810834498 A CN201810834498 A CN 201810834498A CN 109184993 A CN109184993 A CN 109184993A
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- control valve
- level
- needle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The purpose of the present invention is to provide the electric-controlled fuel injectors that fuel injection characteristic can be changed, including pressurization control valve portion, three-level piston component, Injection Control valve portion, needle-valve portion and oil injector body.The present invention uses two-stage electromagnetic valve arrangement, controls the pressurization area of three-level piston, different pressure ratios can be effectively realized, so that fuel injection characteristic is more flexible；Meanwhile supercharger control valve and injector control valve are immersed in low pressure oil, play cooling effect to solenoid valve, guarantee its safe and reliable work；Wherein the present invention uses the valve rod of formula of in injector control valve, and the weight of valve rod is also mitigated while having simplified way to cycle oil, accelerates the response speed of injector control valve；Two-way oil inlet is played the role of in the fluid power compensating piston mechanism that the present invention uses, the repairing in control chamber pressure release when building pressure, so that fuel injection characteristic realizes characteristic anxious after first delaying, improve oil spout performance.
Description
Technical field
The present invention relates to a kind of fuel systems, specifically boat diesel engine fuel system.
Background technique
Tradition machinery formula fuel injector is since the injection characteristics such as injection timing, injection pressure and injection rate are by high-pressure oil feed
The restriction of cam is pumped, it is not flexible that there is injection characteristics, low-response, the disadvantages of to distributive value control accuracy difference.With exhaust method
That advises is increasingly strict, is difficult further to improve the economy and emission performance of engine.
Electromagnetic control type fuel injector applied to Electronic Control for Fuel Injection System of Diesel Engine is responded compared to positive injector
Faster, injection characteristics are flexibly controllable for speed, also more accurate to the control of distributive value.Although electromagnetic control type fuel injector is to diesel oil
The emission performance of machine makes moderate progress, but there is also some shortcomings: fuel injector generallys use the form of single channel oil inlet, and needle-valve is taken a seat
Response speed is slow, and the equilibrium relation due to passing in and out oilhole aperture, it is desirable to it is more difficult to further increase response characteristic；Two two
The dynamic recirculating oil quantity of the form of port valve is larger, influences fuel utilization ratio；Axial gap between needle-valve and control plunger causes to spray
There is static leakage fuel oil etc. in oily device.
Summary of the invention
A kind of the purpose of the present invention is to provide responses fast, injection characteristics flexibly, it is high to fuel-flow control precision, simultaneously can be real
The variable electric-controlled fuel injector of the fuel injection characteristic for now flexibly controlling pressure ratio to reach different jeting effects.
The object of the present invention is achieved like this:
The variable electric-controlled fuel injector of fuel injection characteristic of the present invention, it is characterized in that: include oil injector body, pressurization control valve portion,
Three-level piston component, Injection Control valve portion, needle-valve portion, pressurization control valve portion and three-level piston are mounted on spray from top to bottom
In oily body, Injection Control valve portion and needle-valve portion are arranged in from top to bottom in the tight cap of nozzle, and tight cap of spraying nozzle is fixed on oil spout
Below body；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit
Position orifice plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among upper valve base, supercharger control valve, are pressurized
Fuel inlet is set in control valve upper valve base, and fuel inlet is connected to high-pressure oil passage, and the head of supercharger control valve valve rod is located at by double
Solenoid valve limits in the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted, and external is bacterium shape sleeve, pressurization
Second level armature is installed in the tail portion of control valve valve rod, and level-one armature is installed at the middle part of supercharger control valve valve rod, and second level armature, which is located at, to be increased
Among pressure control valve in valve seat, level-one armature is located in dual-coil electromagnetic valve limit orifice plate, winds second level in supercharger control valve upper valve base
Electromagnet coil winds level-one electromagnet coil, supercharger control valve valve rod tail portion and its top among supercharger control valve in valve seat
Supercharger control valve upper valve base between supercharger control valve valve rod reset spring is set, supercharger control valve valve rod is located under level-one armature
The part of side is cased with level-one armature fixed spring, sets between the extension of bacterium shape sleeve and the charged piston limit orifice plate of lower section
Set bacterium shape sleeve spring, the head of supercharger control valve valve rod is machined with T-type way to cycle oil, T-type way to cycle oil include communicate it is perpendicular
Straight-through road and cross walkway, dual-coil electromagnetic valve limit setting pressurization throttle orifice, two-stage supercharging oil circuit, charged piston limit hole on orifice plate
Level-one Pressure Increasing Oil-Line and low pressure oil leak hole are set on plate, and pressurization throttle orifice, two-stage supercharging oil circuit, level-one Pressure Increasing Oil-Line and low pressure are let out
Oilhole is connected to supercharger control valve valve chamber, is pressurized the other end connection high-pressure oil passage of throttle orifice, and low pressure oil leak hole is connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure,
It is respectively from top to bottom the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it limit between orifice plate
Form plunger shaft, plunger shaft limits the hole in orifice plate by charged piston and is connected to high-pressure oil passage, the first cylinder and the second cylinder and
Level-one booster cavity is formed between oil injector body, and two-stage supercharging chamber is formed between the second cylinder and third cylinder and oil injector body, the
Three-level booster cavity is formed between three cylinders and oil injector body below, and piston return spring, level-one are installed in three-level booster cavity
Booster cavity is connected to level-one Pressure Increasing Oil-Line, and two-stage supercharging chamber is connected to two-stage supercharging oil circuit, and three-level booster cavity is connected to high by check valve
Pressure oil road, three-level booster cavity lower part are provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, intermediate orifice plate, spray
Oil control valve valve rod, armature, injector control valve upper valve base, injector control valve limit orifice plate and intermediate orifice plate are arranged from top to bottom,
The setting of injector control valve valve rod limits in orifice plate in injector control valve, and armature is installed on the top of injector control valve valve rod, armature with
Injector control valve valve rod return spring, injector control valve valve rod return spring are installed between the injector control valve upper valve base above it
Electromagnet coil is wound in external injector control valve upper valve base, and low pressure oil leak hole, oil spout control are set in injector control valve valve rod
Valve limit orifice plate processed and intermediate orifice plate constitute injector control valve valve chamber, and injector control valve stem lower portion includes tapered protrusion, oil spout
Control valve, which limits, is arranged injector control valve in-line on orifice plate, injector control valve in-line connection high-pressure oil passage, on intermediate orifice plate
Oil inlet metering-orifice is set, and oil inlet metering-orifice is connected to injector control valve valve chamber；
The needle-valve portion includes needle-valve limit orifice plate, needle-valve block, and needle-valve limit orifice plate and needle-valve block are arranged from top to bottom
Below intermediate orifice plate, fluid power compensating piston epicoele in-line, non-return passage are set in intermediate orifice plate, installs and stops in non-return passage
Valve is returned, fluid power compensating piston epicoele in-line is connected to high-pressure oil passage, and non-return passage is connected to oil inlet metering-orifice, sets in needle-valve limit orifice plate
Fluid power compensating piston, control chamber oil circuit are set, fluid power compensating piston reset spring is cased with outside fluid power compensating piston, fluid power compensation is lived
The upper end of plug reset spring is withstood on fluid power compensating piston, and the lower end of fluid power compensating piston reset spring withstands on needle-valve below
It limits on orifice plate, is formed on the fluid power compensating piston communicated with fluid power compensating piston epicoele in-line above fluid power compensating piston
Chamber, fluid power compensating piston reset spring present position are fluid power compensating piston cavity of resorption, fluid power compensating piston lower end with below
Needle-valve, which limits, forms fluid power compensating piston draining chamber, control chamber oil communication oil inlet metering-orifice between orifice plate；Needle is installed in needle-valve block
Valve, needle-valve top are cased with needle-valve reset spring, and the upper end of needle-valve reset spring is withstood on needle-valve limit orifice plate, needle-valve reset spring
Lower end withstand on needle-valve, needle-valve reset spring present position is control chamber, and control chamber is connected to control chamber oil circuit, is set in needle-valve block
Oil holding slot in-line is set, forms oil holding slot between needle-valve and needle-valve block, spray orifice, oil holding slot in-line difference is arranged in needle-valve block bottom
It is connected to oil holding slot and Pressure Increasing Oil-Line, fluid power compensating piston cavity of resorption is connected to stopping below check-valves by fluid power compensating piston in-line
Channel is gone back to, fluid power compensating piston cavity of resorption is connected to control chamber by fluid power compensating piston vent line.
Present invention has an advantage that the electric-controlled fuel injector that 1, fuel injection characteristic of the invention can be changed uses three-level step circular table
Charged piston, change pressure ratio by way of changing pressure application surface product, enable the fuel pressure root in oil holding slot
It is adjusted according to actual condition, effectively improves the flexibility of oil spout, diesel engine is enable to better meet stringent row
Laws and regulations requirement is put, the effective economy and dynamic property for improving diesel engine；2, the supercharger control valve that the present invention uses can be realized
Multistage positioning, realizes that the on-off of a plurality of Pressure Increasing Oil-Line is controllable, so as to adjust the high pressure oil active area of charged piston, guarantees automatically controlled
The flexible control of fuel injector pressure ratio；3, the low pressure oil leak hole in injector control valve valve rod is connected with electromagnetism valve chamber, control chamber
Interior fuel oil also plays the effect of cooling solenoid valve by the oil return of low pressure oil leak hole, can increase electromagnetic valve work
Stability, in addition the low pressure oil leak hole in control valve valve rod reduces the quality of injector control valve valve rod, rings injector control valve
It should accelerate.4, fluid power compensating piston can play the role of the repairing into control chamber during control chamber oil return, slow down
Control chamber oil pressure decrease speed plays the role of bleed off circuit during control chamber builds pressure, accelerates control chamber voltage built-up rate, makes
It obtains fuel injection characteristic curve and presents and first delay rear anxious rule.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is supercharger control valve partial schematic diagram；
Fig. 3 is three-level piston component schematic diagram；
Fig. 4 is injector control valve partial schematic diagram；
Fig. 5 is needle-valve portion schematic diagram；
Fig. 6 is fluid power compensating piston partial schematic diagram.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1-6, the variable electric-controlled fuel injector of fuel injection characteristic of the present invention, it is by pressurization control valve portion 1, three-level piston
The tight cap 5 of component 2, Injection Control valve portion 3, needle-valve portion 4, nozzle and oil injector body 6 form.Pressurization control valve portion 1 is main
Orifice plate is limited by two-stage electromagnetic iron coil 9 and second level armature 10, level-one electromagnet coil 11 and level-one armature 12, charged piston
16, bacterium shape sleeve 19, bacterium shape sleeve spring 18, dual-coil electromagnetic valve limit orifice plate 22, supercharger control valve valve rod 24, level-one armature are fixed
Spring 23 and supercharger control valve valve rod reset spring 25 form, and 24 head of supercharger control valve valve rod is provided with T-type way to cycle oil 14,
19 sets of bacterium shape sleeve, on 24 head of supercharger control valve valve rod, are cut off by relative motion and are opened the laterally oil of T-type way to cycle oil 14
Road, the longitudinal oil circuit of T-type way to cycle oil 14 are connected with low pressure oil leak hole 17, supercharger control valve valve chamber 20 and level-one Pressure Increasing Oil-Line
15, two-stage supercharging oil circuit 13 and pressurization throttle orifice 21 communicate, and bacterium shape sleeve 19 is located in supercharger control valve valve chamber 20.Three-level piston
Component 2 mainly includes charged piston 32, piston return spring 29 and check valve 31, and charged piston 32 is three-level step rotary table knot
Structure, charged piston 32 and oil injector body 6 constitute level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28, level-one pressurization
Chamber 26 is connected with level-one Pressure Increasing Oil-Line 15, and two-stage supercharging chamber 27 is connected with two-stage supercharging oil circuit 13, three-level booster cavity 28 with
Oil holding slot 48 is connected, and is connected by check valve 31 with high-pressure oil passage.Low pressure is machined in injector control valve valve rod 35 to let out
Oilhole 36 is connected with electromagnetism valve chamber, and electromagnetism valve chamber is connected with low-pressure reservoir.Including check-valves 51, fluid power compensating piston 52,
Fluid power compensating piston spring 56, control chamber 43, oil holding slot 48, spray orifice 47, needle-valve 45 and needle-valve reset spring 44.Fluid power compensation is lived
Plug portion 50 is mounted on the top of needle-valve portion 6, and needle-valve limits and is equipped with fluid power compensating piston epicoele 59 in orifice plate 49, fluid power compensates
Piston cavity of resorption 57 and fluid power compensating piston draining chamber 55,59 top of fluid power compensating piston epicoele is provided with to be connected to high-pressure oil passage,
Fluid power compensating piston cavity of resorption 57 is connected to fluid power compensating piston in-line 53 and fluid power compensating piston vent line 54 respectively, and fluid power is mended
It repays and check-valves 51 is installed in piston in-line 53.
Fig. 1 is the overall structure diagram for the electric-controlled fuel injector that fuel injection characteristic of the present invention can be changed, mainly by supercharger control valve
Part 1, three-level piston component 2, Injection Control valve portion 3, needle-valve portion 4, the tight cap 5 of nozzle and oil injector body 6 form.Fastening
Pressurization control valve portion 1 is linked closely by screw thread and is fixed on oil injector body 6 by cap 7, and the tight cap 5 of nozzle passes through screw thread for Injection Control
Valve portion 3 and needle-valve portion 4, which are pressed together and linked closely, to be fixed on oil injector body 6.
Fig. 2 is the pressurization control valve portion 1 for the electric-controlled fuel injector that fuel injection characteristic can be changed, and pressurization control valve portion 1 mainly wraps
Include two-stage electromagnetic iron coil 9, two-stage electromagnetic valve 10, level-one electromagnet coil 11, level-one armature 12, charged piston limit orifice plate
16, bacterium shape sleeve 19, bacterium shape sleeve spring 18, dual-coil electromagnetic valve limit orifice plate 22, supercharger control valve valve rod 24, level-one armature are fixed
Spring 23 and supercharger control valve valve rod reset spring 25.Level-one electromagnet coil 11 is superimposed placement with two-stage electromagnetic iron coil 9,
Wherein two-stage electromagnetic iron coil 9 is located at the top of level-one electromagnet coil 11.Dual-coil electromagnetic valve limits orifice plate 22 and charged piston limits
Position orifice plate 16 forms supercharger control valve valve chamber 20, is machined with pressurization throttle orifice 21 and two-stage supercharging on dual-coil electromagnetic valve limit orifice plate 22
Oil circuit 13, the one end for being pressurized throttle orifice 21 and two-stage supercharging oil circuit 13 are all connected with supercharger control valve valve chamber 20, pressurization throttling
21 other end of hole is connected with high-pressure oil passage, and high pressure oil is introduced supercharger control valve valve chamber 20.Charged piston limits on orifice plate 22
Be machined with low pressure oil leak hole 17 and level-one Pressure Increasing Oil-Line 15, low pressure oil leak hole 17 and level-one Pressure Increasing Oil-Line 15 all with supercharger control valve
Valve chamber 20 is connected, and low pressure oil leak hole 17 is connected to low-pressure reservoir.Bacterium shape sleeve 19 is placed in supercharger control valve valve chamber 20, bacterium
For shape sleeve 19 by 18 pressing sleeve of bacterium shape sleeve spring on the head of supercharger control valve valve rod 24, supercharger control valve valve rod 24 can be
It is slided up and down in bacterium shape sleeve 19.24 head of supercharger control valve valve rod is machined with T-type way to cycle oil 14, T-type way to cycle oil 14
Vertical access is connected with the access of bacterium shape sleeve 19, and when bacterium shape sleeve 19 is pressed on supercharger control valve valve rod 24, T-type is returned
The cross walkway of oily access 14 is to close, when supercharger control valve valve rod 24 is moved up with respect to bacterium shape sleeve 19, T-type oil return
Access 14 is opened.Supercharger control valve valve rod 24 and bacterium shape sleeve 19 are pressed on pressurization and lived by supercharger control valve valve rod reset spring 25
On plug limit orifice plate 16, and low pressure oil leak hole 17 is closed.Supercharger control valve valve rod 24 passes through among level-one electromagnet coil 11
Hole and dual-coil electromagnetic valve limit orifice plate 22, level-one electromagnet coil 11 and dual-coil electromagnetic valve limit orifice plate 22 between be placed with one
Grade armature 12, supercharger control valve valve rod 24 pass through 12 center of level-one armature, and level-one armature 12 is fixed on by level-one armature spring 23
On supercharger control valve valve rod 24, magneticaction of the level-one armature 12 by level-one electromagnet coil 11, when level-one armature 12 is inhaled
When conjunction, supercharger control valve valve rod 24 can be detached from level-one armature 12 and move upwards.Second level armature 10 is placed in supercharger control valve valve
24 top of bar, and connect with supercharger control valve valve rod 24, second level armature 10 can be by the electromagnetism masterpiece of two-stage electromagnetic iron coil 9
With.
Fig. 3 show the structural schematic diagram of the three-level piston component 2 of the variable electric-controlled fuel injector of fuel injection characteristic, including pressurization
Piston 32, oil injector body 6, piston return spring 29 and check valve 31.Charged piston 32 is a three-level stepped cylinder structure, with
Charged piston limit orifice plate 16 collectively forms plunger shaft 33, and high pressure oil is passed through plunger shaft by the hole opened on piston limit orifice plate 16
33.Charged piston 32 and oil injector body 6 together constitute level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28,
Middle level-one booster cavity 26 and two-stage supercharging chamber 27 are connected with level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit 13 respectively, pressurization control
High pressure oil in valve valve chamber 20 processed respectively enters 24 He of level-one booster cavity by level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit 13
Two-stage supercharging chamber 25.Three-level booster cavity 28 is connected by check valve 31 with high-pressure oil passage, is placed with work in three-level booster cavity 28
Return spring 29 is filled in, while 28 lower part of three-level booster cavity is also provided with Pressure Increasing Oil-Line 30, Pressure Increasing Oil-Line 30 will be in three-level booster cavity 28
Oil be introduced into oil holding slot 48.
Fig. 4 show the structural schematic diagram of the Injection Control valve portion 3 of the variable electric-controlled fuel injector of fuel injection characteristic, including spray
Oil control valve valve rod 35, armature 40, injector control valve valve rod return spring 42 and injector control valve limit orifice plate 41.Injection Control
Valve limit orifice plate 41 and needle-valve limit orifice plate 38 collectively form injector control valve valve chamber 37, and 35 lower end of injector control valve valve rod is one
A bacterium shape structure is located in injector control valve valve chamber 37.Low pressure oil leak hole 36, oil spout are machined among injector control valve valve rod 35
Injector control valve valve rod 35 is pressed on needle-valve limit orifice plate 38 by control valve valve rod return spring 42, and low pressure oil leak hole 36 is closed
It closes.High-pressure oil passage is provided in injector control valve limit orifice plate 41 towards injector control valve valve chamber 37, while on needle-valve limit orifice plate
Also it is provided with oil inlet metering-orifice 39,39 one end of oil inlet metering-orifice is connected to injector control valve valve chamber 37, and the other end is connected to control chamber 43, will
High pressure oil is introduced into control chamber 43.
Fig. 5 show the structural schematic diagram of the needle-valve portion 6 of the variable electric-controlled fuel injector of fuel injection characteristic, including needle-valve 45,
Needle valve spring 42, fluid power compensating piston part 50 and nozzle 46.Fluid power compensating piston part 50 is as shown in fig. 6, include that fluid power is mended
Repay piston 52 and fluid power compensating piston spring 56.Fluid power compensating piston part 50 is located in needle-valve limit orifice plate 49, limits with needle-valve
Position orifice plate 49 forms fluid power compensating piston cavity of resorption 57 and fluid power compensating piston draining chamber 55, while forming fluid power with intermediate orifice plate 38
Compensating piston epicoele 59, needle valve spring 44 are located in fluid power compensating piston cavity of resorption 57.Fluid power compensating piston epicoele 59 and high pressure oil
Road is connected, and fluid power compensating piston cavity of resorption 57 passes through fluid power compensating piston in-line 53 and fluid power compensating piston vent line respectively
54 are connected with injector control valve valve chamber 37 and control chamber 43, are wherein provided with check-valves in fluid power compensating piston in-line 53
51.Nozzle 46 is located in control chamber 43 with needle-valve limit orifice plate 49 composition control chamber 43 and oil holding slot 48, needle valve spring 44.Nozzle
46 lower ends are provided with spray orifice 47, when the resultant force of the pressure initiation in 44 elastic force of needle valve spring and control chamber 43 is greater than oil holding slot 48 to needle
When the pressure that valve 45 applies, needle-valve 45, which is taken a seat, closes spray orifice 47；When needle-valve 45 lifts, spray orifice 47 is connected to oil holding slot 48,
Commencement of fuel injection.
Fuel oil enters the electric-controlled fuel injector that fuel injection characteristic can be changed from fuel inlet 8, draws at dual-coil electromagnetic valve limit orifice plate 22
A branch out is entered in supercharger control valve valve chamber 20 by being pressurized throttle orifice 21, is divided using supercharger control valve valve chamber 20
At two-way, level-one booster cavity 26 is entered by level-one Pressure Increasing Oil-Line 15 all the way, another way is entered by two-stage supercharging oil circuit 13
Two-stage supercharging chamber 27.Fuel oil continues to draw a branch at charged piston limit orifice plate 16 down, this branch leads to piston
Chamber 33.Fuel oil is divided into two-way in the continuation of oil injector body 6 down and wherein: continuing all the way down through injector control valve limit hole
High-pressure oil passage in plate 41 enters injector control valve valve chamber 37, then enters control chamber 43 by oil inlet metering-orifice 39；Another way is logical
It crosses check valve 31 to enter in three-level booster cavity 28, be entered in oil holding slot 48 by Pressure Increasing Oil-Line 30 still further below.Piston at this time
Hydraulic coupling in chamber 33 is less than level-one booster cavity 26, two-stage supercharging chamber 27 and hydraulic coupling and piston time in three-level booster cavity 28
The resultant force that the elastic force of position spring 29 is formed, charged piston 32 are in extreme higher position, thus the fuel oil in three-level booster cavity 28 not by
Pressurization.The resultant force that the pressure in oil holding slot 48 and needle valve spring 44 are formed simultaneously is greater than the pressure in control chamber 43, at this time needle-valve
45 take a seat.According to the difference of injection process, the variable electric-controlled fuel injector of fuel injection characteristic can be divided into three kinds of different operating modes: nothing
Boost mode, low pressure charging mode and high pressure-charging mode.
When the electric-controlled fuel injector that fuel injection characteristic can be changed works under no boost mode, 1 no power of pressurization control valve portion,
Due to the pressure balance of each acting surface of three-level piston at this time, check valve 31 is opened, therefore the fuel oil pressure in three-level booster cavity 28
Power does not increase, and the fuel pressure in oil holding slot 48 is equal to the pressure of check valve another side.When Injection Control valve portion 3 is powered
When, electromagnet 34 attracts armature 40, and armature 40 drives injector control valve valve rod 35 to move upwards by conical surface seal and to open
Low pressure oil leak hole 36, the fuel oil in control chamber 43 enter solenoid valve by the low pressure oil leak hole 36 in injector control valve valve rod 35
Chamber returns in low-pressure reservoir using the low pressure oil way being arranged in electromagnetism valve chamber, thus the pressure reduction in control chamber 43,
The pressure of fluid power compensating piston cavity of resorption 57 decreases in fluid power compensating piston part 50 simultaneously, fluid power compensating piston epicoele 57
Pressure is greater than the resultant force of the elastic force formation of 57 pressure of fluid power compensating piston cavity of resorption and fluid power compensating piston spring 56, and fluid power is mended at this time
It repays piston 52 to move downward, check-valves 51 is closed, and fluid power compensating piston 52 passes through fluid power compensating piston vent line 54 to control chamber
43 repairings slow down 43 pressure decrease speed of control chamber.It is formed when the elastic force of pressure and needle valve spring 44 in control chamber 43
When resultant force is less than the upward hydraulic coupling of fuel oil in oil holding slot 48, needle-valve 45 is lifted up, and spray orifice 47 is opened, what fuel injection characteristic can be changed
Electric-controlled fuel injector commencement of fuel injection.When Injection Control valve portion 3 powers off, injector control valve valve rod 35 is returned in injector control valve valve rod
It takes a seat under the elastic force effect of position spring 42, high-pressure oil passage is opened while closing low pressure oil leak hole 36, check-valves 51 is opened,
Control chamber 43 builds pressure by oil inlet metering-orifice 39 and fluid power compensating piston cavity of resorption 57 again, when the pressure and needle-valve bullet in control chamber 43
When the resultant force that the elastic force of spring 44 is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot 48, needle-valve 45 drops back into one's seat, fuel injection characteristic
Variable electric-controlled fuel injector stops oil spout.
When the electric-controlled fuel injector that fuel injection characteristic can be changed works under low pressure charging mode, the level-one of pressurization control valve portion 1
Electromagnet coil 11 is powered, and level-one electromagnet attracts level-one armature 12, and level-one armature 12 drives supercharger control valve valve rod 24 upward
Move to level-one electromagnet spacing place.Bacterium shape sleeve 19 is under the action of bacterium shape 18 spring force of sleeve spring with supercharger control valve
Valve rod 24 is lifted up, and low pressure oil leak hole 17 is opened, until by the conical surface seal of the top of bacterium shape sleeve 19.Level-one booster cavity 26
Interior fuel oil flows through low pressure oil leak hole 17 by level-one Pressure Increasing Oil-Line 15 and returns in low-pressure reservoir, at this time in level-one booster cavity 26
Pressure reduction, the pressure in plunger shaft 33 are greater than the pressure in level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28
The sum of with the elastic force of piston return spring 29, charged piston 32 is moved downward, the check valve at the oil inlet of three-level booster cavity 28
31 close, and the fuel pressure in three-level booster cavity 28, which is pressurized, to be increased, and then the fuel pressure in oil holding slot 48 is caused to increase.Then
3 partial current of injector control valve, electromagnet 34 attract armature 40, armature 40 drive injector control valve valve rod 35 move upwards to
By conical surface seal and low pressure oil leak hole 36 is opened, the fuel oil in control chamber 43 is flowed back in low-pressure reservoir by low pressure oil leak hole 36.
Pressure reduction in control chamber 43 at this time, at the same in fluid power compensating piston part 50 fluid power compensating piston cavity of resorption 57 pressure therewith
It reduces, the pressure of fluid power compensating piston epicoele 57 is greater than 57 pressure of fluid power compensating piston cavity of resorption and fluid power compensating piston spring 56
The resultant force that elastic force is formed, fluid power compensating piston 52 moves downward at this time, and check-valves 51 is closed, and fluid power compensating piston 52 passes through fluid power
Compensating piston vent line 54 slows down 43 pressure decrease speed of control chamber to 43 repairing of control chamber.When its pressure and needle valve spring
When 44 resultant force is less than that fuel oil is to the hydraulic coupling of needle-valve 45 in oil holding slot 48, needle-valve 45 is lifted up, and spray orifice 47 is opened, oil spout rule
The variable electric-controlled fuel injector commencement of fuel injection of rule.When Injection Control valve portion 3 powers off, injector control valve valve rod 35 is in Injection Control
It takes a seat under the elastic force effect of valve valve rod return spring 42, opens high-pressure oil passage, non-return while closing low pressure oil leak hole 36
Valve 51 is opened, and control chamber 43 builds pressure by oil inlet metering-orifice 39 and fluid power compensating piston cavity of resorption 57 again, the pressure in control chamber 43
When the resultant force that the elastic force of power and needle valve spring 44 is formed is greater than the upward hydraulic coupling of fuel oil in oil holding slot 48, needle-valve 45 is fallen again
Seat, the variable electric-controlled fuel injector of fuel injection characteristic stop oil spout.When pressurization control valve portion 1 powers off, supercharger control valve valve rod 24
It drives bacterium shape sleeve 19 to take a seat together under the spring-force driven dual of supercharger control valve reset spring 25, is closed by low pressure oil leak hole 17
The conical surface seal of 19 upper end of bacterium shape sleeve is opened while closing, high pressure fuel reenters level-one increasing by level-one Pressure Increasing Oil-Line 15
Chamber 26 is pressed, the pressure in plunger shaft 33 is less than the pressure in level-one booster cavity 26, two-stage supercharging chamber 27 and three-level booster cavity 28 at this time
The sum of the elastic force of power and piston return spring 29, charged piston 32 is back up into initial position.Pressure in three-level booster cavity 28
It reduces, check valve 31 is again turned on, and fuel oil is entered in three-level booster cavity 29 by check valve 31 and enters back into oil holding slot 48.
When the electric-controlled fuel injector that fuel injection characteristic can be changed works under high pressure-charging mode, pressurization control valve portion 1 first
Level-one electromagnet coil 11 is powered, and level-one electromagnet attracts level-one armature 12, and level-one armature 12 drives supercharger control valve valve rod 24
Move upward to level-one electromagnet spacing place.Bacterium shape sleeve 19 is under the action of bacterium shape 18 spring force of sleeve spring as pressurization is controlled
Valve valve rod 24 processed is lifted up, and opens low pressure oil leak hole 17 while by the conical surface seal of the top of bacterium shape sleeve 19.At this time
Fuel oil in level-one booster cavity 26 flows through low pressure oil leak hole 17 by level-one Pressure Increasing Oil-Line 15 and returns in low-pressure reservoir, level-one pressurization
26 pressure reduction of chamber.Then the two-stage electromagnetic iron coil 9 of pressurization control valve portion 1 is powered, and two-stage electromagnetic iron attracts second level armature
10, then second level armature 10 drives supercharger control valve valve rod 24 to be detached from level-one armature 12 and continues up second level limiting position of armature
Place.Supercharger control valve valve rod 24 is detached from the continuation of bacterium shape sleeve 19 and up moves at this time, and T-type way to cycle oil 14 is opened, and second level increases
Fuel oil in pressure chamber 27 flow back into low pressure oil by the T-type way to cycle oil 14 in bacterium shape sleeve 19 again by two-stage supercharging oil circuit 13
In case, 27 pressure of two-stage supercharging chamber also declines.The pressure in plunger shaft 33 is greater than level-one booster cavity 26, two-stage supercharging at this time
The resultant force that the elastic force of pressure and charged piston return spring 29 in chamber 27 and three-level booster cavity 28 is formed, charged piston 32 are downward
It moves, the check valve 31 at the oil inlet of three-level booster cavity 28 is closed, and the fuel pressure in three-level booster cavity 28 increases, and then leads
The fuel pressure in oil holding slot 48 is caused to increase.Then Injection Control valve portion 3 is powered, and electromagnet 34 attracts armature 40, armature 40
Injection Control valve rod 35 is driven to move upwards by conical surface seal and to open low pressure oil leak hole 36, the fuel oil in control chamber 43 is logical
Low pressure oil leak hole 36 is crossed to flow back in low-pressure reservoir.Pressure reduction in control chamber 43 at this time, while fluid power compensating piston part 50
The pressure of middle fluid power compensating piston cavity of resorption 57 decreases, and the pressure of fluid power compensating piston epicoele 47 is greater than under fluid power compensating piston
The resultant force that the elastic force of 57 pressure of chamber and fluid power compensating piston spring 56 is formed, fluid power compensating piston 52 moves downward at this time, non-return
Valve 51 is closed, and fluid power compensating piston 52, to 43 repairing of control chamber, makes 43 pressure of control chamber by fluid power compensating piston vent line 54
Decrease speed slows down.When the resultant force of its pressure and needle valve spring 44 is less than the hydraulic coupling of fuel oil in oil holding slot 48 to 45 valve of needle,
Needle-valve 45 is lifted up, and spray orifice 47 is opened, the variable electric-controlled fuel injector commencement of fuel injection of fuel injection characteristic.When Injection Control valve portion 3
When power-off, injector control valve valve rod 35 is taken a seat under the elastic force effect of injector control valve valve rod return spring 42, is let out by low pressure
Oilhole 36 opens high-pressure oil passage while closing, check-valves 51 is opened, and control chamber 43 is lived by oil inlet metering-orifice 39 and fluid power compensation
Plug cavity of resorption 57 builds the newly-built pressure of ballast again, contains when the resultant force that the elastic force of pressure and needle valve spring 44 in control chamber 43 is formed is greater than
In oil groove 48 when the upward hydraulic coupling of fuel oil, needle-valve 45 drops back into one's seat, and the variable electric-controlled fuel injector of fuel injection characteristic stops oil spout.When
When pressurization control valve portion 1 powers off, the band under the spring-force driven dual of supercharger control valve reset spring 25 of supercharger control valve valve rod 24
Dynamic bacterium shape sleeve 18 is taken a seat together, first close the lateral oil circuit of T-type way to cycle oil 14, is then closing low pressure oil leak hole 17
The conical surface seal of 19 upper end of bacterium shape sleeve is opened simultaneously, high pressure fuel passes through 13 weight of level-one Pressure Increasing Oil-Line 15 and two-stage supercharging oil circuit
Newly enter level-one booster cavity 26 and two-stage supercharging chamber 27, the pressure in plunger shaft 33 is less than level-one booster cavity 26 at this time, second level increases
Press the sum of the elastic force of the pressure and charged piston return spring 29 in chamber 27 and three-level booster cavity 28, charged piston 32 back up into
Initial position.Pressure reduction in three-level booster cavity 28, check valve 31 are again turned on, and fuel oil enters three-level by check valve 31
28 enter back into oil holding slot 48 in booster cavity.
The course of work for the electric-controlled fuel injector that can be changed by fuel injection characteristic is it is found that the present invention passes through change increasing during the work time
The action response of pressure control valve is, it can be achieved that different pressure ratios can be realized fuel injector more to reach different injection pressures
For flexible injection characteristics.Present invention employs the injector control valves of electromagnetic type simultaneously, and which further improves the sound of fuel injector
Speed and control precision are answered, make multi-injection working method is implemented as possibility.Effectively increase the dynamic property of diesel engine
With the economy of fuel oil.Way to cycle oil is set in injector control valve valve rod, oil return circuit is arranged in injector control valve, is risen
The effect for having arrived cooling solenoid valve improves the reliability of the present invention at work.The fluid power compensating piston structure of use is being controlled
Two-way oil inlet is played the role of in repairing when chamber pressure release processed when building pressure, so that fuel injection characteristic realizes characteristic anxious after first delaying, improve
Oil spout performance.
Claims (9)
1. the variable electric-controlled fuel injector of fuel injection characteristic, it is characterized in that: including oil injector body, pressurization control valve portion, three-level piston
Component, Injection Control valve portion, needle-valve portion, pressurization control valve portion and three-level piston are mounted on oil injector body from top to bottom
In, Injection Control valve portion and needle-valve portion are arranged in from top to bottom in the tight cap of nozzle, and tight cap of spraying nozzle is fixed under oil injector body
Side；
The pressurization control valve portion includes supercharger control valve upper valve base, supercharger control valve centre valve seat, dual-coil electromagnetic valve limit hole
Plate, charged piston limit orifice plate, supercharger control valve valve rod, level-one armature, second level armature, bacterium shape sleeve, supercharger control valve upper valve
Valve seat, dual-coil electromagnetic valve limit orifice plate and charged piston limit orifice plate are arranged from top to bottom among seat, supercharger control valve, pressurization control
Fuel inlet is set in valve upper valve base, and fuel inlet is connected to high-pressure oil passage, and the head of supercharger control valve valve rod is located at by double electromagnetism
Valve limits in the supercharger control valve valve chamber that orifice plate and charged piston limit orifice plate are constituted, and external is bacterium shape sleeve, pressurization control
Second level armature is installed in the tail portion of valve valve rod, and level-one armature is installed at the middle part of supercharger control valve valve rod, and second level armature is located at pressurization control
Among valve processed in valve seat, level-one armature is located in dual-coil electromagnetic valve limit orifice plate, winds two-stage electromagnetic in supercharger control valve upper valve base
Iron coil winds level-one electromagnet coil, supercharger control valve valve rod tail portion and the increasing above it among supercharger control valve in valve seat
Supercharger control valve valve rod reset spring is set between pressure control valve upper valve base, and supercharger control valve valve rod is located at below level-one armature
Part is cased with level-one armature fixed spring, and bacterium is arranged between the extension of bacterium shape sleeve and the charged piston limit orifice plate of lower section
Shape sleeve spring, the head of supercharger control valve valve rod are machined with T-type way to cycle oil, T-type way to cycle oil include communicate it is vertical logical
Road and cross walkway, dual-coil electromagnetic valve limit setting pressurization throttle orifice, two-stage supercharging oil circuit, charged piston on orifice plate and limit on orifice plate
Level-one Pressure Increasing Oil-Line and low pressure oil leak hole, pressurization throttle orifice, two-stage supercharging oil circuit, level-one Pressure Increasing Oil-Line and low pressure oil leak hole are set
It is connected to supercharger control valve valve chamber, is pressurized the other end connection high-pressure oil passage of throttle orifice, low pressure oil leak hole is connected to fuel tank；
The three-level piston component includes charged piston, piston return spring, and charged piston is three-level stepped cylinder structure, from upper
And lower is respectively the first-third cylinder, and diameter successively decreases, the first cylinder and the charged piston above it are limited and are formed between orifice plate
Plunger shaft, plunger shaft limit the hole in orifice plate by charged piston and are connected to high-pressure oil passage, the first cylinder and the second cylinder and oil spout
Level-one booster cavity is formed between body, and two-stage supercharging chamber, third column are formed between the second cylinder and third cylinder and oil injector body
Three-level booster cavity is formed between body and oil injector body below, and piston return spring, level-one pressurization are installed in three-level booster cavity
Chamber is connected to level-one Pressure Increasing Oil-Line, and two-stage supercharging chamber is connected to two-stage supercharging oil circuit, and three-level booster cavity is connected to high pressure oil by check valve
Road, three-level booster cavity lower part are provided with Pressure Increasing Oil-Line；
The Injection Control valve portion includes injector control valve upper valve base, injector control valve limit orifice plate, intermediate orifice plate, oil spout control
Valve valve rod processed, armature, injector control valve upper valve base, injector control valve limit orifice plate and intermediate orifice plate are arranged from top to bottom, oil spout
The setting of control valve valve rod limits in orifice plate in injector control valve, and armature is installed on the top of injector control valve valve rod, armature with thereon
Injector control valve valve rod return spring is installed, outside injector control valve valve rod return spring between the injector control valve upper valve base of side
Injector control valve upper valve base in wind electromagnet coil, low pressure oil leak hole, injector control valve are set in injector control valve valve rod
It limits orifice plate and intermediate orifice plate constitutes injector control valve valve chamber, injector control valve stem lower portion includes tapered protrusion, Injection Control
Valve, which limits, is arranged injector control valve in-line on orifice plate, injector control valve in-line is connected to high-pressure oil passage, is arranged on intermediate orifice plate
Oil inlet metering-orifice, oil inlet metering-orifice are connected to injector control valve valve chamber；
The needle-valve portion includes needle-valve limit orifice plate, needle-valve block, needle-valve limit orifice plate and during needle-valve block is arranged in from top to bottom
Between below orifice plate, fluid power compensating piston epicoele in-line, non-return passage are set in intermediate orifice plate, non-return is installed in non-return passage
Valve, fluid power compensating piston epicoele in-line are connected to high-pressure oil passage, and non-return passage is connected to oil inlet metering-orifice, is arranged in needle-valve limit orifice plate
Fluid power compensating piston, control chamber oil circuit are cased with fluid power compensating piston reset spring, fluid power compensating piston outside fluid power compensating piston
The upper end of reset spring is withstood on fluid power compensating piston, and the lower end of fluid power compensating piston reset spring withstands on the limit of needle-valve below
On the orifice plate of position, the fluid power compensating piston epicoele communicated with fluid power compensating piston epicoele in-line is formed above fluid power compensating piston,
Fluid power compensating piston reset spring present position is fluid power compensating piston cavity of resorption, fluid power compensating piston lower end and needle-valve below
It limits and forms fluid power compensating piston draining chamber, control chamber oil communication oil inlet metering-orifice between orifice plate；Needle-valve, needle are installed in needle-valve block
Valve top is cased with needle-valve reset spring, and the upper end of needle-valve reset spring is withstood on needle-valve limit orifice plate, under needle-valve reset spring
End is withstood on needle-valve, and needle-valve reset spring present position is control chamber, and control chamber is connected to control chamber oil circuit, is arranged in needle-valve block and contains
Oil groove in-line forms oil holding slot between needle-valve and needle-valve block, spray orifice is arranged in needle-valve block bottom, and oil holding slot in-line is respectively communicated with
Oil holding slot and Pressure Increasing Oil-Line, fluid power compensating piston cavity of resorption are connected to the non-return below check-valves by fluid power compensating piston in-line and lead to
Road, fluid power compensating piston cavity of resorption are connected to control chamber by fluid power compensating piston vent line.
2. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 1, it is characterized in that: without under boost mode, pressurization
Valve portion no power is controlled, check valve is opened；When injector control valve partial current, electromagnet attracts armature, and armature drives spray
Oil control valve valve rod moves upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber passes through Injection Control
Low pressure oil leak hole in valve valve rod enters electromagnetism valve chamber, returns to low pressure using the low pressure oil way being arranged in electromagnetism valve chamber
In fuel tank, fluid power compensating piston is moved downward, closure of check ring, and fluid power compensating piston passes through the fuel-displaced road direction control of fluid power compensating piston
Chamber repairing processed, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is less than upward hydraulic of fuel oil in oil holding slot
When power, needle-valve is lifted up, and spray orifice is opened；When the power-off of Injection Control valve portion, injector control valve valve rod is in injector control valve
It takes a seat under the elastic force effect of valve rod return spring, high-pressure oil passage is opened while by low pressure draining bore closure, check-valves is opened,
Control chamber builds pressure by oil inlet metering-orifice and fluid power compensating piston cavity of resorption again, when the elastic force of pressure and needle valve spring in control chamber
When the resultant force of formation is greater than the upward hydraulic coupling of fuel oil in oil holding slot, needle-valve drops back into one's seat.
3. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 1 or 2, it is characterized in that: increasing under low pressure charging mode
The level-one electromagnet coil power of pressure control valve part, level-one electromagnet attract level-one armature, and level-one armature drives pressurization control
Valve valve rod moves upward to level-one electromagnet spacing place；Bacterium shape sleeve is under the action of bacterium shape sleeve spring power with pressurization control
Valve valve rod is lifted up, and low pressure oil leak hole is opened, until by the conical surface seal above bacterium shape sleeve.Combustion in level-one booster cavity
Oil flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir, and charged piston moves downward, three-level booster cavity
Closed check valve at oil inlet；Subsequent injector control valve partial current, electromagnet attract armature, and armature drives injector control valve
Valve rod moves upwards by conical surface seal and to open low pressure oil leak hole, and the fuel oil in control chamber is flowed back to low by low pressure oil leak hole
In pressure oil case, fluid power compensating piston is moved downward, closure of check ring, and fluid power compensating piston passes through the fuel-displaced road direction of fluid power compensating piston
Control chamber repairing, when the resultant force for controlling cavity pressure and needle valve spring is less than the hydraulic coupling of fuel oil in oil holding slot to needle-valve, needle-valve
It is lifted up, spray orifice is opened；When the power-off of Injection Control valve portion, injector control valve valve rod is in injector control valve valve rod return bullet
It takes a seat under the elastic force effect of spring, high-pressure oil passage is opened while by low pressure draining bore closure, check-valves is opened, and control chamber passes through
Oil inlet metering-orifice and fluid power compensating piston cavity of resorption build pressure again, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed
When upward greater than fuel oil in oil holding slot hydraulic coupling, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, supercharger control valve
Valve rod drives bacterium shape sleeve to take a seat together under the spring-force driven dual of supercharger control valve reset spring, by low pressure draining bore closure
While open the conical surface seal of bacterium shape sleeve upper end, high pressure fuel reenters level-one booster cavity by level-one Pressure Increasing Oil-Line,
Charged piston is again turned on back up into initial position, check valve, fuel oil by check valve enter in three-level booster cavity again into
Enter to oil holding slot.
4. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 1 or 2, it is characterized in that: under high pressure-charging mode, it is first
The level-one electromagnet coil power of first pressurization control valve portion, level-one electromagnet attract level-one armature, and level-one armature drives pressurization
Control valve valve rod moves upward to level-one electromagnet spacing place；Bacterium shape sleeve is under the action of bacterium shape sleeve spring power with pressurization
Control valve valve rod is lifted up, and opens low pressure oil leak hole while by conical surface seal above bacterium shape sleeve；Level-one at this time
Fuel oil in booster cavity flows through low pressure oil leak hole by level-one Pressure Increasing Oil-Line and returns in low-pressure reservoir, then pressurization control valve portion
Two-stage electromagnetic iron coil be powered, two-stage electromagnetic iron attracts second level armature, and then second level armature drives supercharger control valve valve rod de-
It is continued up at second level limiting position of armature from level-one armature；Supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up transports
It is dynamic, T-type way to cycle oil is opened, the intracavitary fuel oil of two-stage supercharging passes through the T-type in bacterium shape sleeve by two-stage supercharging oil circuit again
Way to cycle oil is flow back into low-pressure reservoir, and charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity；After
And injector control valve partial current, electromagnet attract armature, armature drives Injection Control valve rod to move upwards to which the conical surface is close
Seal and open low pressure oil leak hole, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, fluid power compensating piston to
Lower movement, closure of check ring, fluid power compensating piston is by the fuel-displaced road direction control chamber repairing of fluid power compensating piston, when control cavity pressure
When being less than the hydraulic coupling of fuel oil in oil holding slot to needle-valve with the resultant force of needle valve spring, needle-valve is lifted up, spray orifice oil spout；Work as oil spout
When controlling valve portion power-off, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, is being incited somebody to action
High-pressure oil passage is opened while low pressure draining bore closure, check-valves is opened, and control chamber passes through oil inlet metering-orifice and fluid power compensating piston
Cavity of resorption builds pressure again, when to be greater than fuel oil in oil holding slot upward for the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed
When hydraulic coupling, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, supercharger control valve valve rod resets bullet in supercharger control valve
It drives bacterium shape sleeve to take a seat together under the spring-force driven dual of spring, first closes T-type way to cycle oil transverse direction oil circuit, then by low pressure
The conical surface seal of bacterium shape sleeve upper end is opened while draining bore closure, high pressure fuel passes through level-one Pressure Increasing Oil-Line and two-stage supercharging
Oil circuit reenters level-one booster cavity and two-stage supercharging chamber, and charged piston is again turned on back up into initial position, check valve, combustion
Oil is entered in three-level booster cavity by check valve enters back into oil holding slot.
5. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 3, it is characterized in that: under high pressure-charging mode, first
The level-one electromagnet coil power of pressurization control valve portion, level-one electromagnet attract level-one armature, and level-one armature drives pressurization control
Valve valve rod processed moves upward to level-one electromagnet spacing place；Bacterium shape sleeve is under the action of bacterium shape sleeve spring power as pressurization is controlled
Valve valve rod processed is lifted up, and opens low pressure oil leak hole while by conical surface seal above bacterium shape sleeve；Level-one increases at this time
It presses intracavitary fuel oil to flow through low pressure oil leak hole by level-one Pressure Increasing Oil-Line to return in low-pressure reservoir, then pressurization control valve portion
Two-stage electromagnetic iron coil is powered, and two-stage electromagnetic iron attracts second level armature, and then second level armature drives supercharger control valve valve rod to be detached from
Level-one armature continues up at second level limiting position of armature；Supercharger control valve valve rod is detached from the continuation of bacterium shape sleeve and up moves,
T-type way to cycle oil is opened, the intracavitary fuel oil of two-stage supercharging passes through the T-type oil return in bacterium shape sleeve by two-stage supercharging oil circuit again
Access is flow back into low-pressure reservoir, and charged piston moves downward, the closed check valve at the oil inlet of three-level booster cavity；Then it sprays
Oil control valve partial current, electromagnet attract armature, and armature drives Injection Control valve rod to move upwards thus simultaneously by conical surface seal
Low pressure oil leak hole is opened, the fuel oil in control chamber is flowed back in low-pressure reservoir by low pressure oil leak hole, and fluid power compensating piston is transported downwards
Dynamic, closure of check ring, fluid power compensating piston is by the fuel-displaced road direction control chamber repairing of fluid power compensating piston, when control cavity pressure and needle
When the resultant force of valve spring is less than that fuel oil is to the hydraulic coupling of needle-valve in oil holding slot, needle-valve is lifted up, spray orifice oil spout；Work as Injection Control
When valve portion powers off, injector control valve valve rod is taken a seat under the elastic force effect of injector control valve valve rod return spring, by low pressure
High-pressure oil passage is opened while draining bore closure, check-valves is opened, and control chamber passes through oil inlet metering-orifice and fluid power compensating piston cavity of resorption
Again pressure is built, when the resultant force that the elastic force of pressure and needle valve spring in control chamber is formed is greater than upward hydraulic of fuel oil in oil holding slot
When power, needle-valve drops back into one's seat；When the power-off of pressurization control valve portion, supercharger control valve valve rod is in supercharger control valve reset spring
It drives bacterium shape sleeve to take a seat together under spring-force driven dual, first closes T-type way to cycle oil transverse direction oil circuit, then by low pressure draining
The conical surface seal of bacterium shape sleeve upper end is opened while bore closure, high pressure fuel passes through level-one Pressure Increasing Oil-Line and two-stage supercharging oil circuit
Level-one booster cavity and two-stage supercharging chamber are reentered, charged piston is again turned on back up into initial position, check valve, and fuel oil is logical
It crosses check valve and enters in three-level booster cavity and enter back into oil holding slot.
6. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 1 or 2, it is characterized in that: supercharger control valve valve rod
With, at three rib type parts, bacterium shape sleeve lining length is longer than three rib type partial-lengths at bacterium shape sleeve cooperation.
7. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 3, it is characterized in that: supercharger control valve valve rod and bacterium
At three rib type parts at shape sleeve cooperation, bacterium shape sleeve lining length is longer than three rib type partial-lengths.
8. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 4, it is characterized in that: supercharger control valve valve rod and bacterium
At three rib type parts at shape sleeve cooperation, bacterium shape sleeve lining length is longer than three rib type partial-lengths.
9. the variable electric-controlled fuel injector of fuel injection characteristic according to claim 5, it is characterized in that: supercharger control valve valve rod and bacterium
At three rib type parts at shape sleeve cooperation, bacterium shape sleeve lining length is longer than three rib type partial-lengths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834498.XA CN109184993A (en) | 2018-07-26 | 2018-07-26 | The variable electric-controlled fuel injector of fuel injection characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834498.XA CN109184993A (en) | 2018-07-26 | 2018-07-26 | The variable electric-controlled fuel injector of fuel injection characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109184993A true CN109184993A (en) | 2019-01-11 |
Family
ID=64937615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810834498.XA Withdrawn CN109184993A (en) | 2018-07-26 | 2018-07-26 | The variable electric-controlled fuel injector of fuel injection characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109184993A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250876A (en) * | 2021-06-18 | 2021-08-13 | 中国北方发动机研究所(天津) | Slide valve type common rail oil sprayer |
| CN115288902A (en) * | 2022-09-01 | 2022-11-04 | 哈尔滨工程大学 | Low-oil return amount double-lift-range variable oil injection rule electric control oil injector |
| CN115992785A (en) * | 2023-03-24 | 2023-04-21 | 哈尔滨工程大学 | Micro oil return electric control oil sprayer with double needle valves and variable oil injection rate |
| CN116838510A (en) * | 2023-09-04 | 2023-10-03 | 哈尔滨工程大学 | Double needle valve electric control fuel injector with changeable fuel injection rule |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| WO2013086427A1 (en) * | 2011-12-07 | 2013-06-13 | Quantlogic Corporation | A fuel injector for multi-fuel injection with pressure intensification and a variable orifice |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
-
2018
- 2018-07-26 CN CN201810834498.XA patent/CN109184993A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5954030A (en) * | 1994-12-01 | 1999-09-21 | Oded E. Sturman | Valve controller systems and methods and fuel injection systems utilizing the same |
| JP2006161568A (en) * | 2004-12-02 | 2006-06-22 | Nippon Soken Inc | Control valve and fuel injection valve having the same |
| WO2013086427A1 (en) * | 2011-12-07 | 2013-06-13 | Quantlogic Corporation | A fuel injector for multi-fuel injection with pressure intensification and a variable orifice |
| CN104018969A (en) * | 2014-05-29 | 2014-09-03 | 哈尔滨工程大学 | Piezoelectric control pressure accumulation and stabilization oil sprayer |
| CN104632485A (en) * | 2014-12-29 | 2015-05-20 | 沪东重机有限公司 | Common-rail fuel oil jet system controlled by double electromagnetic valves and applied to low-speed diesel engine for ship |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250876A (en) * | 2021-06-18 | 2021-08-13 | 中国北方发动机研究所(天津) | Slide valve type common rail oil sprayer |
| CN115288902A (en) * | 2022-09-01 | 2022-11-04 | 哈尔滨工程大学 | Low-oil return amount double-lift-range variable oil injection rule electric control oil injector |
| CN115288902B (en) * | 2022-09-01 | 2023-12-08 | 哈尔滨工程大学 | Low oil return amount double-lift variable oil injection rule electric control oil injector |
| CN115992785A (en) * | 2023-03-24 | 2023-04-21 | 哈尔滨工程大学 | Micro oil return electric control oil sprayer with double needle valves and variable oil injection rate |
| CN116838510A (en) * | 2023-09-04 | 2023-10-03 | 哈尔滨工程大学 | Double needle valve electric control fuel injector with changeable fuel injection rule |
| CN116838510B (en) * | 2023-09-04 | 2023-11-24 | 哈尔滨工程大学 | Double needle valve electric control fuel injector with changeable fuel injection rule |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7574995B2 (en) | Fuel injection system | |
| CN109184986A (en) | The variable pressure accumulation type electric control fuel oil jet system of fuel injection characteristic | |
| CN109184993A (en) | The variable electric-controlled fuel injector of fuel injection characteristic | |
| CN109253002A (en) | Variable boost is than pressure accumulation type electric control fuel oil jet system | |
| CN104564460A (en) | Supercharged common rail fuel injection system of marine low-speed diesel engine | |
| US3625192A (en) | Fuel injection nozzle with hydraulic valve-closing means | |
| JP3887583B2 (en) | Fuel injection device | |
| CN109098899A (en) | Pressure accumulation type piezoelectricity-electromagnetic control oil sprayer with control chamber sliding block | |
| US4653448A (en) | Fuel injection device | |
| CN109184996A (en) | Piezoelectricity-electromagnetic control oil sprayer with control chamber sliding block | |
| CN104632317A (en) | Vent valve device for high-power low-speed marine diesel engine | |
| CN109026477A (en) | Pressure-accumulating type electronic control fuel injection device with control chamber sliding block | |
| CN109236521A (en) | The variable pressure-accumulating type electronic control fuel injection device of fuel injection characteristic | |
| CN104533678A (en) | Marine low-speed diesel engine common-rail fuel injection system with external pressurization piston | |
| CN109236526A (en) | Pressure accumulation type bivalve electric-controlled fuel injector | |
| GB2367330A (en) | Common-rail fuel injector | |
| CN210919296U (en) | Piston type hydraulic compensation pressurization electric control oil injector | |
| CN109026478A (en) | The variable pressure accumulation type piezoelectricity of fuel injection characteristic-electromagnetism mixing control fuel injector | |
| CN109083785A (en) | Pressure accumulation type electric control fuel oil jet system with control chamber sliding block | |
| US20040089269A1 (en) | Fuel injection device with a pressure booster | |
| CN109236532A (en) | Electric-controlled fuel injector with control chamber sliding block | |
| CN204492917U (en) | A kind of high-power marine low-speed diesel engine discharge valve apparatus | |
| CN109236527A (en) | Variable boost is than piezoelectricity-electromagnetic control oil sprayer | |
| CN109026476A (en) | The variable pressure accumulation type piezoelectric fuel injector of fuel injection characteristic | |
| CN109083787A (en) | Pressure accumulation type piezoelectric fuel injector with control chamber sliding block |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190111 |
|
| WW01 | Invention patent application withdrawn after publication |