WO2005054655B1 - Method for providing a controlled injection rate and injection pressure in a fuel injector assembly - Google Patents
Method for providing a controlled injection rate and injection pressure in a fuel injector assemblyInfo
- Publication number
- WO2005054655B1 WO2005054655B1 PCT/US2004/039072 US2004039072W WO2005054655B1 WO 2005054655 B1 WO2005054655 B1 WO 2005054655B1 US 2004039072 W US2004039072 W US 2004039072W WO 2005054655 B1 WO2005054655 B1 WO 2005054655B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection
- pressure
- valve
- level
- current
- Prior art date
Links
- 238000002347 injection Methods 0.000 title claims abstract 43
- 239000007924 injection Substances 0.000 title claims abstract 43
- 239000000446 fuel Substances 0.000 title claims abstract 22
- 238000000034 method Methods 0.000 title claims abstract 12
- 230000001105 regulatory effect Effects 0.000 claims abstract 23
- 230000001276 controlling effect Effects 0.000 claims abstract 7
- 239000007788 liquid Substances 0.000 claims 9
- 239000012530 fluid Substances 0.000 claims 2
- 208000035859 Drug effect increased Diseases 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
- F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
-
- 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
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
-
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0043—Two-way valves
-
- 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
- F02M63/0059—Arrangements of valve actuators
- F02M63/0068—Actuators specially adapted for partial and full opening of the valves
-
- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A method for controlling injection rate and injection pressure of an electromagnetic fuel injector assembly having a pressure balanced control valve including a solenoid and a valve member subject to the pressure developed by the injector and actuated by the solenoid to close the valve member against the biasing force of a spring. The control valve is supported in a valve bore in an injector body. The method includes the step of providing a first level of current to the solenoid for moving the valve member from an open to a closed position allowing the pressure in the injector to rise, providing a regulated current to the solenoid at preselected times during the injector event to unbalance the forces acting on the valve member thereby slightly unseating the valve member to regulate injection pressure and injection rate of the fuel injector, and ending solenoid current delivery thereby moving the valve member to its open position.
Claims
1. A method for controlling injection rate and injection pressure of a liquid fuel injector having a nozzle assembly and an injector plunger in an injector cylinder for developing nozzle assembly injection pressure, a pressure balanced control valve assembly including a valve body with a valve bore defining a valve seat, a movable valve element in the valve bore with a valve head on the movable valve element, the valve head and the valve seat defining a liquid fuel flow opening, the movable valve element communicating with a pressure regulated nozzle passage whereby the valve element is subject to injection pressure developed by the fuel injector plunger when it is stroked during an injection event, the valve seat and the valve head defining in part a fluid pressure spill passage communicating with the pressure regulated nozzle passage, the spill passage communicating with a fluid supply passage whereby the injector cylinder is supplied with liquid fuel when the fuel injection plunger is retracted, a solenoid actuator for the movable valve element, the valve seat and the valve head being normally open with the solenoid de- energized, and a spring acting on the valve element to oppose a solenoid actuator force; the method comprising the steps of: providing a first level of regulated current to the solenoid actuator to activate the movable valve element causing the valve head to move toward the valve seat to a first pressure regulating position defining a reduced liquid fuel flow opening whereby the spill flow passage has a first degree of fuel flow restriction thereby allowing regulated injection pressure in the nozzle assembly to rise and creating an initial liquid fuel injection pulse in an initial injection rate-controlled fuel injection period; providing a second reduced level of regulated current to the solenoid actuator for a preselected time following the initial liquid fuel injection pulse during an injection event to move the valve head away from the valve seat to a second pressure regulating position and to define an increased liquid fuel flow opening thereby creating a reduced initial injection pressure during the initial injection rate- controlled period; and providing a third level of regulated current at a value to cause the valve head to move toward the valve seat to a third pressure regulating position to define a decreased liquid fuel flow opening thereby creating a high third injection pressure regulating position that allows regulated injection pressure in the nozzle assembly to rise further during a main injector rate-controlled fuel injection period and to create a peak injection pressure pulse near the end of the injection event.
2. The method set forth in claim 1 wherein the step of providing a third level of regulated current includes the step of maintaining the third level of regulated current during the main injection rate-controlled fuel injection period, thereby maintaining the peak injection pressure pulse for a precalibrated time near the end of the injection event.
3. The method set forth in claim 2 wherein the step of providing the third level of regulated current is followed by the step of controlling depressurization of the nozzle assembly at the end of the main injection rate- controlled period.
4. The method set forth in claim 3 wherein the step of providing the third level of regulated current is preceded by a step of increasing the regulated pressure at a controlled rate following the initial injection rate-controlled period.
5. The method set forth in claim 3 wherein the step of controlling depressurization of the nozzle assembly comprises the steps of reducing the level of current to a first lower depressurization control level following the step of providing the third level of regulated current and reducing the level of current further to a second lower depressurization control level thereby terminating the injection event.
6. The method set forth in claim 4 wherein the step of controlling depressurization of the nozzle assembly comprises the steps of reducing the level of current to a first lower depressurization control level following the step of providing the third level of regulated current and reducing the level of current further to a second lower depressurization control level thereby terminating the injection event.
15
7. A method for controlling injection rate and injection pressure of a liquid fuel injector having a nozzle assembly and an injector plunger in an injector cylinder for developing nozzle assembly injection pressure when it is stroked, a pressure-balanced control valve including a solenoid actuator and a valve element subject to pressures developed by the injector plunger, the valve element being actuated by the solenoid to apply a force on the valve element for metering fuel flow to the injector nozzle assembly, a valve spring acting on the valve element and opposing a solenoid actuator force, the valve element having a valve head surrounded by a valve seat and defining with the valve seat a fuel flow spill passage, the valve element controlling the injection pressure between an initial pressure and a maximum pressure, the method including the steps of: providing a first level of current to the solenoid actuator for moving the valve element from a normally open position toward a closed position to a first pressure regulating position allowing injection pressure to rise in an initial rate- controlled period; providing a reduced level of current to the solenoid actuator following the initial rate-controlled period to reduce the force on the valve element and to move the valve head away from the valve seat, thereby regulating the pressure to reduce the rate of injection of the fuel as the valve element assumes a second pressure regulating position; providing an increased level of current to the solenoid actuator following the initial rate-controlled period for moving the valve element toward its closed position to a third fuel pressure regulating position to effect increased pressure regulation and a peak injection pressure value during a peak injection rate- controlled period; providing a further reduced level of current to the solenoid actuator following the peak injection rate-controlled period to move the valve element under spring force to a depressurization position; and ending solenoid actuator current delivery thereby moving the valve away from the valve seat to its fully open position at the end of an injection event.
16
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112004002280T DE112004002280T5 (en) | 2003-11-28 | 2004-11-19 | A method of providing a controlled injection rate and pressure in a fuel injection assembly |
| GB0609805A GB2422915B8 (en) | 2003-11-28 | 2004-11-19 | Method for providing a controlled injection rate and injection pressure in a fuel injector assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/724,480 US7150410B1 (en) | 1999-01-29 | 2003-11-28 | Method for providing a controlled injection rate and injection pressure in a fuel injector assembly |
| US10/724,480 | 2003-11-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO2005054655A2 WO2005054655A2 (en) | 2005-06-16 |
| WO2005054655A3 WO2005054655A3 (en) | 2006-07-20 |
| WO2005054655B1 true WO2005054655B1 (en) | 2006-08-24 |
Family
ID=34652669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2004/039072 WO2005054655A2 (en) | 2003-11-28 | 2004-11-19 | Method for providing a controlled injection rate and injection pressure in a fuel injector assembly |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE112004002280T5 (en) |
| GB (1) | GB2422915B8 (en) |
| WO (1) | WO2005054655A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7707993B2 (en) | 2008-06-24 | 2010-05-04 | Caterpillar Inc. | Electronic pressure relief in a mechanically actuated fuel injector |
| US20200025122A1 (en) * | 2018-07-17 | 2020-01-23 | Continental Automotive Systems, Inc. | Engine control system and method for controlling activation of solenoid valves |
| CN109411179B (en) * | 2018-11-14 | 2021-03-02 | 立讯精密工业（昆山）有限公司 | Coil framework |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5494219A (en) * | 1994-06-02 | 1996-02-27 | Caterpillar Inc. | Fuel injection control valve with dual solenoids |
| US5687693A (en) * | 1994-07-29 | 1997-11-18 | Caterpillar Inc. | Hydraulically-actuated fuel injector with direct control needle valve |
-
2004
- 2004-11-19 WO PCT/US2004/039072 patent/WO2005054655A2/en active Application Filing
- 2004-11-19 GB GB0609805A patent/GB2422915B8/en not_active Expired - Fee Related
- 2004-11-19 DE DE112004002280T patent/DE112004002280T5/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2422915A (en) | 2006-08-09 |
| WO2005054655A2 (en) | 2005-06-16 |
| GB2422915A8 (en) | 2007-06-05 |
| GB2422915B (en) | 2007-05-02 |
| GB0609805D0 (en) | 2006-06-28 |
| WO2005054655A3 (en) | 2006-07-20 |
| GB2422915B8 (en) | 2007-06-05 |
| DE112004002280T5 (en) | 2006-11-02 |
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