CN103415350A - Piezoelectric fuel injector having temperature compensating unit - Google Patents
Piezoelectric fuel injector having temperature compensating unit Download PDFInfo
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- CN103415350A CN103415350A CN2011800392534A CN201180039253A CN103415350A CN 103415350 A CN103415350 A CN 103415350A CN 2011800392534 A CN2011800392534 A CN 2011800392534A CN 201180039253 A CN201180039253 A CN 201180039253A CN 103415350 A CN103415350 A CN 103415350A
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- fuel
- injector
- injection needle
- fuel injection
- compensation unit
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Images
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
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
- F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention provides a fuel injector, comprising a housing having a scalable injector seat; a fuel injector pin disposed within the housing proximate to the injector seat such that the injector seat may be sealed and unsealed by displacing the fuel injector pin; a resilient element biasing the fuel injector pin in an unsealed direction; a piezoelectric actuator disposed within the housing proximal to the fuel injector pin configured to actuate to force the injector pin towards the injector seat to seal the injector seat; and a thermal compensating unit disposed within the housing proximal to the actuator and configured to compensate for thermal expansion or contraction of a component of the fuel injector.
Description
Related application
It is the U.S. Patent application 12/817 on June 16th, 2010 that the application requires the applying date, 136 priority, it is the U.S. Patent application 12/503 on July 15th, 2009 that the latter requires the applying date, 764 priority, it is the U.S. Provisional Patent Application 61/081 on July 16th, 2008 that the latter requires the applying date, 326 priority, the content of these patent applications all are incorporated in the application for your guidance.
Technical field
The present invention relates to fuel injection system haply, more particularly, the present invention relates to the piezoelectric-actuated fuel injector with heating and catalytic member for engine, particularly internal combustion engine.
Background technology
The energy in the world much all is consumed in the motor vehicle driven based on internal combustion.The efficiency of most of gasoline and diesel automobile engine only has 20-30%, so that a big chunk of HC fuel has been wasted, thereby causes the world energy sources exhaustion, produces simultaneously excessive pollutant and greenhouse gases.Along with HC fuel becomes rarer and more expensive, it is desirable using more efficiently these fuel.
Typical fuel injector can have hydraulic pressure, electromagnetism or piezoelectric actuated fuel injection needle.Piezoelectric element is the varying sized material of energy when applying voltage on this element.When voltage shift removed, piezoelectric element returned back to its original size.When the actuator, by a plurality of stacked piezoelectric elements together to form larger piezoelectric element or " piezoelectric pile ", to increase the displacement of actuator.In piezoelectric actuated fuel injector, by one or more this piezoelectric elements or piezoelectric pile, activate fuel injection needle and with metering ground, fuel is sprayed in internal combustion engine.
Summary of the invention
Some embodiment of the present invention provides has piezoelectric actuated fuel injection needle and the fuel injector of temperature compensation unit.In other embodiments, fuel injector comprises heating part and catalysed partial.Fuel injection needle contacts with seating plane, and described seating plane stops fuel to enter the combustion chamber of engine when cutting out.In this embodiment, flexible member makes fuel injection needle be offset to enable possition, and piezo-activator is shifted to seal described seating plane.Temperature compensation unit is arranged on the other end of fuel injection needle.Temperature compensation unit comprises fluid chamber, and described fluid chamber is inflatable or shrink with the positioning and voltage element, in order to accurately control component of oil sprayer.Temperature compensation unit comprises the chamber that flow is controllably passed in and out.
According to another embodiment of fuel injector of the present invention, provide the fuel injector with piezoelectric actuated fuel injection needle, described fuel injection needle has catalysed partial and temperature compensation unit.Do not need in this embodiment heater, because fuel is heated before being sent to fuel injection system.
The present invention also provides fuel is dispensed to the method in the combustion chamber of internal combustion engine.Described method requires the fuel in the lower fluid chamber in fuel injector is forced into to the first force value, and the fuel in the upper fluid chamber of fuel injector is forced into to the second force value.Described the first force value is greater than described the second force value, and this pressure differential causes fuel injection needle to move and fuel is dispensed in the combustion chamber of internal combustion engine.
The accompanying drawing explanation
Fig. 1 is the motor vehicle example that can use the embodiment of the present invention.
Fig. 2 is the example that can use the embodiment of the present invention.
Fig. 3 is the schematic diagram of the embodiment of the present invention.
Fig. 4 is the external view of fuel injector in accordance with the principles of the present invention.
Fig. 5 is the profile of fuel injector in accordance with the principles of the present invention.
Fig. 6 is the detailed view of the black box of fuel injector in accordance with the principles of the present invention.
Fig. 7 is the scrap detail view of the black box of fuel injector in accordance with the principles of the present invention.
Fig. 8 is the scrap detail view that comprises in accordance with the principles of the present invention the fuel injector of fluid chamber.
Fig. 9 is the scrap detail view of the piezoelectric element of the fuel injector of another embodiment in accordance with the principles of the present invention.
Figure 10 is the profile of the fuel injector of another embodiment in accordance with the principles of the present invention.
Figure 11 is the profile of the fuel injector black box of another embodiment in accordance with the principles of the present invention.
Figure 12 is the profile of the fuel injector of another embodiment in accordance with the principles of the present invention.
Fig. 3 is the generalized section of fuel injector according to an embodiment of the invention.
The specific embodiment
Following paragraph will and be described the present invention in detail by reference to the accompanying drawings by embodiment.All preferred embodiments that this specification is described should be considered as example, rather than limitation of the present invention." the present invention " in this specification refers to arbitrary embodiment or its equivalent of the invention that this specification is described.In addition, in this specification, mention and do not mean that all claimed embodiment or the method to the various features of " the present invention " must comprise the feature be mentioned.
Before describing the present invention in detail, it is useful first describing several examples of implementing environment of the present invention.Such example is by oil-engine driven vehicle.Fig. 1 illustrates such vehicle 50.Fuels sources 51 is set in this vehicle, and described fuels sources 51 is connected with engine 52 by fuel conduit 53.The fuel of fuels sources 51 supplies thinks that for driving engine 52 vehicle 50 provides power.Fig. 2 illustrates an example of internal combustion engine more specifically.Engine 52 comprises a plurality of cylinders 54 that are provided with piston 55.A plurality of fuel injectors 56 are configured to engine 52 supply fuel, and are connected 53 with fuels sources 51.Piston 55 and cylinder 54 are configured to form combustion chamber, and during the power stroke of engine, fuel 58 sprays into described combustion chamber from fuel injector 56 with being measured.When fuel 58, mix with air and when being lighted, piston 55 displacements, thus bent axle 57 is rotated and power is provided.
This specification will be described the present invention according to these example environments frequently.According to the description of these environment, make and can under the background of application example, describe various feature of the present invention and embodiment.By reading this specification, those skilled in the art will know to know how in other different environment, to implement the present invention.
Fig. 3 is the schematic diagram of fuel injector 100 according to an embodiment of the invention.Fuel injector 100 comprises the housing 202 with fuel injection needle 205 and piezoelectric element, and described fuel injection needle 205 and piezoelectric element are arranged in housing 202, and described piezoelectric element comprises one or more piezo-activator heaps 234.Between housing 202 and fuel injection needle 205, form fluid chamber 216.Housing 202 also comprises base of automobile injector 212, and described base of automobile injector 212 is configured to admit described fuel injection needle, so that fuel injector can open ejection fuel with measuring or cut out to prevent that fuel from overflowing from fuel injector.As described in this manual, piezoelectric pile 234 comprises a plurality of piezoelectric elements 230.Piezoelectric pile 234 is connected with electric wire 75 in order on piezoelectric pile 234, apply voltage expands so that fuel injection needle 205 is pushed to base of automobile injector 212 it, thereby seals described fuel injector.Temperature compensation unit 76 comprises temperature compensator 240, and described temperature compensator 240 is configured to provide pedestal, and piezoelectric element 234 is resisted against on this pedestal while expanding.Temperature compensation unit 76 also comprises fluid chamber 506, and described fluid chamber 506 is connected with fluid source by inlet ducts 241, allows fluid turnover fluid chamber 506, thereby makes fluid chamber 506 expand or shrink.This expansion or the position of shrinking change temperature compensator 240, thereby the position of the pedestal of change piezo-activator 234.In certain embodiments, the change of the temperature of all parts of fuel injector 100 can cause that the required shift length of abundant actuating fuel injection needle 205 changes.Correspondingly, temperature compensation unit 76 can be configured to make the change in location of actuator 234 to compensate these changes.In other embodiments, flexible member 509 be set in housing and be configured to make temperature compensator 240 to be offset to the direction of base of automobile injector 212 it.In other embodiments, provide viscous flow or hydraulic pressure to do the damping displacement with allowable temperature compensator 240 during activating fuel injector by fluid chamber 506, thus the elongation of the fuel injection needle 205 that the compensation temperature rising causes.
Fig. 4 is the external view according to the fuel injector of an embodiment.Fuel injection needle comprises heating and catalysed partial.Fuel injection needle contacts with seating plane, and when this seating plane is closed, prevents that fuel from entering the combustion chamber of engine.Fuel injection needle is directly activated by piezoelectric element.Fig. 5 is the profile according to the fuel injector of an embodiment.
The fuel injection needle assembly is contained in shell body, and described shell body is concentric and coaxial with inner housing.Fuel injection needle can slide on described inner housing surface.The inner surface of lower fuel injection needle assembly and inner housing forms sealing to prevent fluid below lower fuel injection needle with fluid contact from upper fuel injection needle assembly or to mix.Lower fuel injection needle and inner surface can adopt any suitable sealing device, for example precise finiss sealing, bellows seal, seal with O ring, barrier film, artificial rubber or energization sealing.
In one embodiment, can on the inner surface of the outer surface of lower fuel injection needle and inner housing, all be coated with catalysis element.But also can only be coated on one of them of these two surfaces in other embodiments.
The present invention also comprises the fuel injector element, and it can be piezoelectric element.Described piezoelectric element is comprised of at least one piezoelectric pile of being controlled by controller.Piezoelectric element directly is fixed on fuel injection needle.By supporting structure, each piezoelectric pile is remained in shell body.Described piezoelectric pile has at least one makes fuel injection needle be offset to the flexible member of enable possition.Must just can close component of oil sprayer to the piezoelectric pile charging.
At a piezoelectric element end set temperature compensating unit relative with fuel injection needle.Described temperature compensation unit is to allow that piezoelectric element and fuel injection needle expand and shrink the fluid chamber that also can deal with temperature change.This makes can accurately control component of oil sprayer.Described temperature compensation unit has the chamber that liquid fuel can controllably flow into or flow out.
An advantage of the invention is that catalysis material in fuel injector makes fuel can be by for example hydrocarbon cracking oxidized or transform, and operates engine more efficiently.Another advantage of the present invention is to use piezoelectric element make fuel injector energy snap action and be quick on the draw.
Fig. 4 illustrates fuel injector 100 of the present invention.Fuel injector 100 has the lower house 104 be connected with upper shell 102.Lower house 104 and upper shell 102 are connected with each other by bayonet coupling, but can adopt the method for attachment of any type.Lower house 104 has the shell body caused by stainless steel, but can adopt any suitable metal.Described shell body has bottom, and described bottom has base of automobile injector.Described base of automobile injector comprises the inner surface of shell body, and at least one makes the fuel can be from the hole of fuel injector 100 ejection.Can have a plurality of by the hole of fuel from fuel injector 100 derivation.
Fig. 5 is the profile of fuel injector 200 of the present invention.Inner housing 204 is arranged in shell body 202 with one heart, and described inner housing 204 has the hollow inner surface that allows fuel injection needle 205 to pass through.The internal diameter of described inner housing is about 4 millimeters, but can adopt any suitable size.
Still referring to Fig. 5, described top 208 comprises black box 214.In this embodiment, black box 214 is arranged between described bottom and described top around the top of fuel injection needle.In near fluid chamber 216 described base of automobile injector 212 and under forming between bottom 206 and inner housing.Described lower fluid chamber 216 is connected pressurized fuel to be sent to the combustion chamber of engine with input port.
In a preferred embodiment, the inner housing 204 adjacent with lower fluid chamber 216 comprises heating element heater 218.Described heating element heater 218 can be the device that resistance coil or heating tube or any other are suitable, so that the inner surface of controlling inner housing selectively heats.Heating element heater 218 can have bag on its outer surface, the heat-barrier material between itself and shell body 202, think that described heating element heater 218 is heat insulation.Described heat-barrier material can be a plurality of metal levels of being made by steel or other suitable thermal resistance materials.Heating element heater 218 can be heated to the fuel in the first fluid chamber temperature between 400 degrees Fahrenheit to 1400 degrees Fahrenheits, thereby makes fuel reach supercritical temperature to realize more efficient burning.Heating element heater 218 extends to the top of the bottom of fuel injection needle from base of automobile injector 212, to heat equably whole lower fluid chamber.Correspondingly, the fuel overwhelming majority in lower fluid chamber is in supercriticality.In another embodiment, can enter under fuel injector heating fuel before fluid chamber and not need heating element heater at fuel.
The present invention also comprises the catalysis element 220 in described lower fluid chamber 216.Described catalysis element 220 can be coating, brazing, plating, surface treatment, coiling or pressure welding, invests the inner surface of the bottom of fuel injection needle and/or inner housing or one-body molded with the latter.In this embodiment, the part of the outer surface of the bottom of catalysis element 220 formation fuel injection needles.Catalysis element 220 also can be arranged on the part of inwall of the inner housing 204 adjacent with lower fluid chamber 216.The fuel be contained in lower fluid chamber 216 reacts with catalyst 220, with combustion fuel more efficiently in combustion chamber.Described catalyst is preferably the nickel that contains 5% molybdenum of having an appointment.But also can adopt following any catalyst: nickel, nickel-molybdenum, α-type aluminium oxide, aluminium-silica, other air electrode oxygen reduction catalysts and other catalyst for the hydrocarbon cracking.
As shown in Figure 5, black box 214 is passed on the top 208 of fuel injection needle.Fig. 6 is the detailed view of described black box 214.Specifically, black box 214 has the main element 300 that is positioned at shell body 202.Described main element can be general cylindrical shape, and keeps a segment distance by a plurality of isolation supportive devices 302 and described outer shell walls.As shown in Figure 5, black box 214 has inner room 222, and the top 208 of fuel injection needle 205 extends through described inner room 222, between the inner room sidewall of the top 208 of fuel injection needle and sealed body, main sealing device 224 is set.Main sealing device 224 can be O shape circle, grinds slip, waveform tubular type, lip seal formula, scraper plate, labyrinth packing or any other suitable sealing device.In addition, can be in the situation that with described main sealing device 224 adjacents, the effect of auxiliary standby sealing device 226 with the performance safety device that lost efficacy at main sealing device 224 be set.Described auxiliary standby sealing device 226 can be made by metal or elastomeric material.
In addition, described auxiliary standby sealing device 226 can be diaphragm seal.Can between fuel injection needle and inner room sidewall, with main sealing device 224 adjacents, teflon washer be set.Described main sealing device 224 prevents the fuel effusion in lower fluid chamber 216, allows simultaneously fuel injection needle still can move in the vertical with respect to the black box main element.Described main element can have cooling bath around its circumferential edges to assist main sealing device cooling.
As shown in Figure 7, the top 208 of fuel injection needle 205 is passed black box 214 and is extended to flange components 228.Described flange components 228 forms the roughly even curface contacted with fuel injector element 234.In this embodiment, described flange components 228 comprises the cap portion 248 on 208 tops, top that are positioned at fuel injection needle 205.Described cap portion 248 is for cylindrical shape and have at an upper portion thereof curved surface.Described curved surface contacts with flange components 228, and the latter contacts with fuel injector element 234 again.In the situation that the pressure that fuel injector element 234 is applied on described smooth part is inhomogeneous, the pressure that described curvature portion is applied on fuel injection needle 205 fuel injector element 234 is uniformly distributed.By a plurality of flexible members 232, make flange components 228 and fuel injection needle 205 be offset to the direction made progress away from base of automobile injector.Described flexible member 232 can be disc spring, helical spring, tubular spring, nonlinear spring or any other suitable device.
As shown in Figure 8, temperature compensator 240 is positioned at the top of fuel injector.During running, described temperature compensator 240 is be used to compensating the thermal expansion of fuel injector element 234 and fuel injection needle 205, and allows fuel injector element, fuel injection needle and the tolerance variation of pad 504 in manufacture process.Described temperature compensator 240 has the flange-like base section 244 of next-door neighbour's fuel injector element 234.Described flange section 244 is positioned at shell body 502.In this embodiment, between fuel injector element 234 and flange section 244, place one or more annular gaskets 504 with allow foozle and fill fuel injector element 234 and flange section 244 between redundant space.Between flange section 244 and shell body 502, forming fluid chamber 506.Described upper fluid chamber 506 has inlet ducts 241 so that fluid flows to and flows out described upper fluid chamber 506.The fluid used in upper fluid chamber 506 can be fuel or any other suitable oil or hydraulic fluid.Described inlet ducts 241 can have pin hole or check-valves to control flow.Use the flexible member 509 such as disc spring, helical spring, tubular spring, nonlinear spring or any other suitable device to make flange section 244 to 234 biasings of fuel injector element.Can the outer circumferential edges of flange section 244 and described on compensator seal 508 is set between shell body, for example O shape is enclosed, is ground slip, waveform tubular type, lip seal formula, scraper plate, labyrinth packing or any other suitable sealing device, to form upper fluid chamber 506.Temperature compensator 240 produces by viscous damping or between fluid chamber 506 and inlet ducts 241 that dynamic pressure is poor to play a role.
Fig. 9-12 illustrate another embodiment of temperature compensator.As shown in the figure, flange section 244 is positioned at upper shell 202.Can between fuel injector element 234 and flange section 244, place a plurality of annular gaskets 504 with allow foozle and fill fuel injector element 234 and flange section 244 between redundant space.Piston plate 602 invests on flange section 244 to form second fluid chamber 604 and the 3rd fluid chamber 606.Can between the outer circumferential edges of described piston plate 602 and upper shell 202, compensator seal 508 be set, for example slip, waveform tubular type, lip seal formula, scraper plate, labyrinth packing or any other suitable sealing device are enclosed, ground to O shape, to form second fluid chamber 604 and the 3rd fluid chamber 606.Piston plate 602 has the conduit 608 that connects second fluid chamber 604 and the 3rd fluid chamber 606, so that fluid flows freely to produce damping action between two described fluid chamber.Dividing plate 610 forms the roof of second fluid chamber 602, thereby forms the base plate of the 4th fluid chamber 612 in upper shell body 502.The 4th fluid chamber 612 has inlet ducts 614 in order to described the 4th fluid chamber is applied to fuel pressure, and the latter applies downward pressure to described dividing plate 610 again.
It is contemplated that, when fuel injection needle 205 expanded because temperature raises, flange section 244 was upwards pushed away.When flange section 244 was upwards pushed away, piston plate 602 was upwards pushed away similarly.Be contained in the expansion of liquids in second fluid chamber 604 and the fluid in the 3rd fluid chamber 606 is sucked to second fluid chamber 604.Fuel pressure acts on a relative side of the dividing plate 610 in the 4th fluid chamber 612, with the anti-fluid pressure pushed away in the 3rd fluid chamber 606.Along with fluid flows to second fluid chamber 604 from the 3rd fluid chamber 606, piston plate 602 can move up so that the thermal expansion of fuel injection needle 205 reduces.
The function mode of different embodiments of the invention is below described.As shown in Figure 5, in the first embodiment, at first fuel is forced into to suitable pressure, and makes it flow into upper fluid chamber 246 and lower fluid chamber 216.Heating is around the heating element heater 218 of lower fluid chamber 216 so that fuel reaches supercriticality.
The fuel injector element is slowly charged to operating voltage so that close fuel injection needle and be resisted against base of automobile injector 212 to form Fluid Sealing.When fuel injection needle is in the closed position, pressurized fuel is pumped in lower fluid chamber 216 by input port 242.Make fluid chamber 246 be full of fuel, the fuel pressure in its pressure and lower fluid chamber 216 is roughly the same.By inlet ducts 241, make fuel flow to body chamber, upper reaches 246.The voltage that reduces fuel injector element 234 leaves base of automobile injector 212 so that fuel injection needle 205 rises.Thereby make fuel flow out fuel injector and enter combustion chamber.
In order to close fuel injector, increase the voltage be applied on fuel injector element 234 so that fuel injector element 234 promotes fuel injection needles 205 to against base of automobile injector 212, thus the sealing fuel injector.Simultaneously, fuel injector element 234 presses to temperature compensator flange 244.Using temperature compensator 240 as the capable of regulating plane of reference, push/be pulled away from fuel injection needle 205 to this plane of reference.This move is extruded upper fluid chamber 246 by partially liq by hole 250 again.The effect of temperature compensator and piezoelectric fuel injector damper is played in the action that liquid fuel flows out from upper fluid chamber 246 simultaneously.
In a second embodiment, utilize pressure differential to activate fuel injector.Fuel pressure in lower fluid chamber 246 is different from the fuel pressure that puts on temperature compensator 240.In this embodiment, the fuel pressure in lower fluid chamber 216 is greater than the fuel pressure in fluid chamber 246, and this makes fuel injection needle 205 be offset to enable possition.In another kind of configuration mode, the fuel pressure in lower fluid chamber 216 is less than the fuel pressure in fluid chamber 246, so that fuel injection needle 205 is offset to closed position.
As shown in Fig. 9-12, in the 3rd embodiment, use damper fluid to activate fuel injector at temperature compensator 240 places.In this embodiment, in second fluid chamber 604 and the 3rd fluid chamber 606, use the pressurization damper fluid of viscosity higher than fuel.Fuel is pumped into to the 4th fluid chamber 612, so that fuel injection needle 205 is offset to closed position.Fuel or other gas-pressurizeds are pumped into to lower fluid chamber 216, and the pressure of described fuel or other gas-pressurizeds and the pressure that pumps into the fuel of the 4th fluid chamber 612 or gas are about equally.The pressure of damper fluid makes fuel injection needle be offset to enable possition.The adverse effect power of the fuel in lower fluid chamber 216 and the 4th fluid chamber 612 is combined with the pressure of damper fluid, makes fuel injection needle 205 keep the pressure neutral condition.
In the 4th embodiment, utilize simultaneously fuel and damper fluid to activate fuel injector.In this embodiment, in second fluid chamber 604 and the 3rd fluid chamber 606, use the pressurization damper fluid of viscosity higher than fuel.Fuel or other gas-pressurizeds are pumped into to the 4th fluid chamber 612, so that fuel injection needle is offset to closed position.Fuel is pumped into to dirty body chamber 216, and the pressure of described fuel is different from the pressure of the fuel that pumps into the 4th fluid chamber 612 or gas.The pressure of damper fluid makes fuel injection needle be offset to enable possition.Depend on fuel pressure in lower fluid chamber 216 and the pressure differential of the fuel pressure in the 4th fluid chamber 612, fuel injection needle optionally is offset to be opened or closed position.
Second, third, roughly the same to charging and discharging and first embodiment of fuel injector element in the 4th embodiment.
In all embodiment of the present invention, can come fuel is pressurizeed with general service pump, independent and different pump, pressure-regulating device or their any combinations.
In the above-described embodiments, the use of piezoelectric element makes and can accurately and rapidly control fuel injector.In addition, the use of temperature compensator makes the expansion that can compensate fuel injection needle and can apply damping to piezoelectric element.The heating element heater relevant to the first fluid chamber is for being heated to supercritical temperature by fuel.In addition, if fuel is pressurized to supercritical pressure, efficiency of combustion is higher, thus fuel saving.Owing in the first fluid chamber, using catalyst, fuel can be oxidized or be transformed, and therefore when fuel sprayed, efficiency of combustion was higher, thereby further raises the efficiency.
It will be appreciated by those skilled in the art that the present invention can implement by the mode that is different from each embodiment described for the purpose illustrated rather than limit in this specification, and the present invention is limited by claims only.The equivalent that it should be noted that specific embodiment discussed in this description also can be implemented the present invention.
Should be appreciated that various embodiments of the present invention described above are just as example, rather than restriction.Similarly, each schematic diagram means that example arrangement of the present invention or structure are to help to understand feature and the function that the present invention may comprise.The invention is not restricted to these example arrangement or structure, required feature can be implemented by multiple other structures and structure.In fact, those skilled in the art will know how by other functions, logic OR physical arrangement and structure, to implement required feature of the present invention.In addition, can refer to each assembly with the multiple component Name different from the title used in this specification.In addition, for flow chart, operating instruction and claim to a method, the order of step described herein does not also mean that and must implement each embodiment to realize described function with same order, unless context points out that order is immutable.
Be to be understood that, although more than described a plurality of embodiment of the present invention, the application of various features, aspect and the function of describing in one or more independent embodiment is not limited to this embodiment, but can be separately or with various Combination application in one or more other embodiment of the present invention, no matter whether these other embodiment here describe, no matter also whether this feature occurs as the part of the embodiment described.Therefore width of the present invention and scope should not be subject to the restriction of above-mentioned any embodiment.
Unless expressly stated, the word used in this document and phrase and version thereof are interpreted as open, rather than restrictive.For example, above-mentioned " comprising ", a word was interpreted as " including, but are not limited to " or the similar meaning; " embodiment " word is used to the object of discussing that example is provided, rather than its exhaustive or restricted list; " one " is interpreted as " at least one ", " one or more " or the similar meaning; Word such as " convention ", " tradition ", " normally ", " standard ", " known " and the similar meaning should not be construed as the object that description object is limited to a certain special time period or exists at certain special time, and is understood to include convention present or that may exist or learn any time in the future, tradition, normal or standard technique.Similarly, when this document was mentioned the technology that those skilled in the art know that or know, this technology comprised now or the technology that those skilled in the art know that or know in the future any time.
Use in some cases such as " one or more ", " at least ", " but being not limited to " or other similar extended word and phrase, in absent variable other situations of this type of phrase, should not be construed as and refer to or require the narrower meaning.The use of " module " word does not also mean that part description or claimed parts or function as this module all are arranged in same packing.In fact, any or all of parts of a module, no matter be control logic or miscellaneous part, can be combined in same packing, or independent the setting, or be scattered in a plurality of positions.
In addition, each embodiment set forth here illustrates to describe according to block diagram, flow chart and other.Those skilled in the art will be clear by reading this document, and the enforcement of described embodiment and modification thereof is not limited by the examples.For example, block diagram and explanation thereof should not be construed as and limit a kind of specific structure or structure.
Claims (20)
1. device, described device comprises:
Housing with sealable base of automobile injector;
Be arranged on the fuel injection needle of the described base of automobile injector of next-door neighbour in described housing, the displacement by described fuel injection needle seals and opens described base of automobile injector;
Make described fuel injection needle be offset to the flexible member of opening direction;
Be arranged on the piezo-activator of the described fuel injection needle of next-door neighbour in described housing, described piezo-activator is configured to activate described fuel injection needle is pushed to described base of automobile injector to seal described base of automobile injector; And
Be arranged on the temperature compensation unit of the described actuator of next-door neighbour in described housing, described temperature compensation unit is configured to compensate thermal expansion or the contraction of the parts of described fuel injector.
2. device according to claim 1, wherein, described temperature compensation unit comprises the fluid chamber that keeps fluid to be communicated with fluid source.
3. device according to claim 2, wherein, described temperature compensation unit is configured to compensate by viscous damping or hydraulic pressure thermal expansion or the contraction of described parts.
4. device according to claim 2, wherein, described temperature compensation unit also comprises the second flexible member, described the second flexible member is configured to apply the bias force towards described base of automobile injector on described actuator.
5. device according to claim 4, wherein, described temperature compensation unit also comprises that the temperature compensator be arranged in described housing is to be delivered to described actuator by power from described flexible member and fluid chamber.
6. device according to claim 5, wherein, described fluid source comprises fuels sources.
7. device according to claim 6, wherein, described fuel injector also comprises the fuel chambers that is arranged in described housing and keeps fluid to be communicated with described fuels sources.
8. device according to claim 7, wherein, described fuel injector be configured to make the fuel in described fluid chamber before fuel sprays, have with described fuel chambers in fuel pressure about equally.
9. device, described device comprises:
Internal combustion engine with a plurality of cylinders;
Fuels sources; And
The fuel injector that a plurality of and described fuels sources and described cylinder keep fluid to be communicated with, described fuel injector is configured to, at the engine run duration, fuel is sent to described a plurality of cylinder from described fuels sources;
Wherein, a fuel injector in described a plurality of fuel injector comprises:
Housing with sealable base of automobile injector;
Be arranged on the fuel injection needle of the described base of automobile injector of next-door neighbour in described housing, the displacement by described fuel injection needle seals and opens described base of automobile injector;
Make described fuel injection needle be offset to the flexible member of opening direction;
Be arranged on the piezo-activator of the described fuel injection needle of next-door neighbour in described housing, described piezo-activator is configured to activate described fuel injection needle is pushed to described base of automobile injector to seal described base of automobile injector; And
Be arranged on the temperature compensation unit of the described actuator of next-door neighbour in described housing, described temperature compensation unit is configured to compensate thermal expansion or the contraction of the parts of described fuel injector.
10. device according to claim 9, wherein, described temperature compensation unit comprises the fluid chamber that keeps fluid to be communicated with fluid source.
11. device according to claim 10, wherein, described temperature compensation unit is configured to compensate by viscous damping or hydraulic pressure thermal expansion or the contraction of described parts.
12. device according to claim 10, wherein, described temperature compensation unit also comprises the second flexible member, and described the second flexible member is configured to apply the bias force towards described base of automobile injector on described actuator.
13. device according to claim 12, wherein, described temperature compensation unit also comprises that the temperature compensator be arranged in described housing is to be delivered to described actuator by power from described flexible member and fluid chamber.
14. device according to claim 13, wherein, described fluid source comprises described fuels sources.
15. device according to claim 14, wherein, described fuel injector also comprises the fuel chambers that is arranged in described housing and keeps fluid to be communicated with described fuels sources.
16. device according to claim 14, wherein, described fuel injector be configured to make the fuel in described fluid chamber before fuel sprays, have with described fuel chambers in fuel pressure about equally.
17. a device, described device comprises:
Internal combustion engine with a plurality of cylinders;
Fuels sources; And
The fuel injector that a plurality of and described fuels sources and described cylinder keep fluid to be communicated with, described fuel injector is configured to, at the engine run duration, fuel is sent to described a plurality of cylinder from described fuels sources;
Wherein, a fuel injector in described a plurality of fuel injector comprises:
Housing with sealable base of automobile injector;
Be arranged on the fuel injection needle of the described base of automobile injector of next-door neighbour in described housing, the displacement by described fuel injection needle seals and opens described base of automobile injector;
Make described fuel injection needle be offset to the flexible member of opening direction;
Be arranged on the piezo-activator of the described fuel injection needle of next-door neighbour in described housing, described piezo-activator is configured to activate described fuel injection needle is pushed to described base of automobile injector to seal described base of automobile injector; And
Be arranged on the temperature compensation unit of the described actuator of next-door neighbour in described housing, described temperature compensation unit is configured to compensate thermal expansion or the contraction of the parts of described fuel injector,
Wherein, described temperature compensation unit comprises the fluid chamber that keeps fluid to be communicated with fluid source.
18. device according to claim 17, wherein, described temperature compensation unit is configured to compensate by viscous damping or hydraulic pressure thermal expansion or the contraction of described parts.
19. device according to claim 17, wherein, described temperature compensation unit also comprises the second flexible member, and described the second flexible member is configured to apply the bias force towards described base of automobile injector on described actuator.
20. device according to claim 19, wherein, described temperature compensation unit also comprises that the temperature compensator be arranged in described housing is to be delivered to described actuator by power from described flexible member and fluid chamber.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/817,136 | 2010-06-16 | ||
| US12/817,136 US7992545B2 (en) | 2008-07-16 | 2010-06-16 | Piezoelectric fuel injector having a temperature compensating unit |
| PCT/US2011/033872 WO2011159395A2 (en) | 2008-07-16 | 2011-04-26 | Piezoelectric fuel injector having a temperature compensating unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103415350A true CN103415350A (en) | 2013-11-27 |
| CN103415350B CN103415350B (en) | 2016-01-20 |
Family
ID=47996540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180039253.4A Expired - Fee Related CN103415350B (en) | 2010-06-16 | 2011-04-26 | There is the piezoelectric fuel injector of temperature compensation unit and comprise its fuel injection system |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2582469A4 (en) |
| CN (1) | CN103415350B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6213414B1 (en) * | 1999-04-28 | 2001-04-10 | Bobert Bosch Gmbh | Fuel injector |
| US6739528B2 (en) * | 2000-10-11 | 2004-05-25 | Siemens Automotive Corporation | Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method |
| CN101487433A (en) * | 2007-11-16 | 2009-07-22 | 德尔菲技术公司 | Fuel injector |
| CN101560935A (en) * | 2008-04-18 | 2009-10-21 | 马涅蒂-马瑞利公司 | Fuel injector with direct shutter actuation for internal combustion engines |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7762236B2 (en) * | 2008-07-16 | 2010-07-27 | Transonic Combustion, Inc. | Piezoelectric fuel injector having a temperature compensating unit |
-
2011
- 2011-04-26 CN CN201180039253.4A patent/CN103415350B/en not_active Expired - Fee Related
- 2011-04-26 EP EP11796116.9A patent/EP2582469A4/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6213414B1 (en) * | 1999-04-28 | 2001-04-10 | Bobert Bosch Gmbh | Fuel injector |
| US6739528B2 (en) * | 2000-10-11 | 2004-05-25 | Siemens Automotive Corporation | Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method |
| CN101487433A (en) * | 2007-11-16 | 2009-07-22 | 德尔菲技术公司 | Fuel injector |
| CN101560935A (en) * | 2008-04-18 | 2009-10-21 | 马涅蒂-马瑞利公司 | Fuel injector with direct shutter actuation for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103415350B (en) | 2016-01-20 |
| EP2582469A2 (en) | 2013-04-24 |
| EP2582469A4 (en) | 2017-01-25 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160908 Address after: michigan Patentee after: Ai Kemote company Address before: American California Patentee before: Transonic Combustion, Inc. |
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Granted publication date: 20160120 Termination date: 20170426 |