EP0896144A3 - Fuel injection control apparatus for an accumulator type engine - Google Patents

Fuel injection control apparatus for an accumulator type engine Download PDF

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Publication number
EP0896144A3
EP0896144A3 EP98114568A EP98114568A EP0896144A3 EP 0896144 A3 EP0896144 A3 EP 0896144A3 EP 98114568 A EP98114568 A EP 98114568A EP 98114568 A EP98114568 A EP 98114568A EP 0896144 A3 EP0896144 A3 EP 0896144A3
Authority
EP
European Patent Office
Prior art keywords
fuel
injection control
fuel pressure
common rail
target
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Withdrawn
Application number
EP98114568A
Other languages
German (de)
French (fr)
Other versions
EP0896144A2 (en
Inventor
Akira Kotani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP0896144A2 publication Critical patent/EP0896144A2/en
Publication of EP0896144A3 publication Critical patent/EP0896144A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
    • F02D41/3872—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves characterised by leakage flow in injectors
    • 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
    • F02D41/3827—Common rail control systems for diesel engines
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing 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
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

A fuel injection control apparatus for an accumulator type engine (1) efficiently reduces fuel pressure in an accumulator pipe (4) if the fuel pressure exceeds a target pressure, thereby ensuring stable combustion. Injectors (2) of a diesel engine (1) are connected to a common rail (4) provided commonly for all the cylinders (#1-#4) of the engine. The common rail (4) is connected to a supply pump (6) by a supply pipe (5). Each injector (2) has a mechanism that injects fuel into the corresponding one of the cylinders (#1-#4) when an electromagnetic valve (3) provided in the injector (2) is driven, and that releases fuel to reduce the fuel pressure in the common rail (4) during an early period (ineffective injection time) after the start of the driving of the electromagnetic valve (3). An electronic control unit (51) executes an ineffective injection control during the ineffective injection control time to reduce the fuel pressure in the common rail (4), if the target injection amount is "0" and the actual fuel pressure is greater than the target fuel pressure. The ineffective injection control time is set to greater values as the fuel temperature decreases.
EP98114568A 1997-08-04 1998-08-03 Fuel injection control apparatus for an accumulator type engine Withdrawn EP0896144A3 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP20918097 1997-08-04
JP209180/97 1997-08-04
JP20918097A JP3546285B2 (en) 1997-08-04 1997-08-04 Fuel injection control device for accumulator type engine

Publications (2)

Publication Number Publication Date
EP0896144A2 EP0896144A2 (en) 1999-02-10
EP0896144A3 true EP0896144A3 (en) 2000-07-12

Family

ID=16568669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98114568A Withdrawn EP0896144A3 (en) 1997-08-04 1998-08-03 Fuel injection control apparatus for an accumulator type engine

Country Status (2)

Country Link
EP (1) EP0896144A3 (en)
JP (1) JP3546285B2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2364746B (en) * 1997-12-11 2002-04-17 Denso Corp Accumulator fuel injection system for diesel engine of automotive vehicles
GB2332241B (en) * 1997-12-11 2001-12-19 Denso Corp Accumulator fuel injection system for diesel engine of automotive vehicles
GB9900070D0 (en) * 1999-01-05 1999-02-24 Lucas Franc Control method
JP4122615B2 (en) * 1999-02-24 2008-07-23 トヨタ自動車株式会社 Fuel pressure control system for high-pressure fuel injection system
DE10318647B4 (en) 2003-04-24 2005-04-28 Siemens Ag Method and apparatus for adjusting an injection period of fuel through an injection valve
JP4517849B2 (en) * 2004-12-15 2010-08-04 株式会社デンソー Engine fuel injection control device
DE102005012998B3 (en) * 2005-03-21 2006-09-21 Siemens Ag Common rail injection system for e.g. diesel engine, has injectors comprising injection nozzles for injecting fuel into combustion chamber, where one of injectors or part of injectors serves for pressure reduction in high pressure area
DE102005012997B4 (en) * 2005-03-21 2010-09-09 Continental Automotive Gmbh Pressure reduction method for an injection system and corresponding injection systems
JP4755608B2 (en) * 2007-01-23 2011-08-24 ボッシュ株式会社 Fuel injection control device
EP2011994B1 (en) 2007-07-05 2010-04-28 Magneti Marelli S.p.A. Method for controlling the overpressure in a fuel-supply system of a common-rail type
EP2123890A1 (en) 2008-05-21 2009-11-25 GM Global Technology Operations, Inc. A method and system for controlling operating pressure in a common-rail fuel injection system, particularly for a diesel engine
JP4909973B2 (en) * 2008-11-14 2012-04-04 日立オートモティブシステムズ株式会社 Control device for internal combustion engine
US9303580B2 (en) 2012-10-26 2016-04-05 Ford Global Technologies, Llc Detection of diesel fuel gelling
US11015548B2 (en) * 2017-12-14 2021-05-25 Cummins Inc. Systems and methods for reducing rail pressure in a common rail fuel system
JP7030553B2 (en) * 2018-02-09 2022-03-07 株式会社ジャパンエンジンコーポレーション Hydraulic drive
CN109630301A (en) * 2018-12-11 2019-04-16 潍柴动力股份有限公司 A kind of control method and device of the injection of No leakage fuel injector sky

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191865A (en) * 1989-01-20 1990-07-27 Nippondenso Co Ltd Fuel injection device
US4955345A (en) * 1989-06-16 1990-09-11 General Motors Corporation Multi-fuel engine control with fuel composition responsive fuel viscosity correction
WO1996019659A1 (en) * 1994-12-20 1996-06-27 Robert Bosch Gmbh Process for reducing the fuel pressure in a fuel injection system
JPH0988669A (en) * 1995-09-21 1997-03-31 Mitsubishi Motors Corp Accumulator fuel injection control device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02191865A (en) * 1989-01-20 1990-07-27 Nippondenso Co Ltd Fuel injection device
US4955345A (en) * 1989-06-16 1990-09-11 General Motors Corporation Multi-fuel engine control with fuel composition responsive fuel viscosity correction
WO1996019659A1 (en) * 1994-12-20 1996-06-27 Robert Bosch Gmbh Process for reducing the fuel pressure in a fuel injection system
JPH0988669A (en) * 1995-09-21 1997-03-31 Mitsubishi Motors Corp Accumulator fuel injection control device
US5906188A (en) * 1995-09-21 1999-05-25 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Accumulator type fuel injection control system and the method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 478 (M - 1036) 18 October 1990 (1990-10-18) *

Also Published As

Publication number Publication date
JPH1150899A (en) 1999-02-23
JP3546285B2 (en) 2004-07-21
EP0896144A2 (en) 1999-02-10

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