EP0971119A3 - Common-rail fuel-injection system - Google Patents

Common-rail fuel-injection system Download PDF

Info

Publication number
EP0971119A3
EP0971119A3 EP99305441A EP99305441A EP0971119A3 EP 0971119 A3 EP0971119 A3 EP 0971119A3 EP 99305441 A EP99305441 A EP 99305441A EP 99305441 A EP99305441 A EP 99305441A EP 0971119 A3 EP0971119 A3 EP 0971119A3
Authority
EP
European Patent Office
Prior art keywords
fuel
valve
pressure
injection
lift
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.)
Granted
Application number
EP99305441A
Other languages
German (de)
French (fr)
Other versions
EP0971119A2 (en
EP0971119B1 (en
Inventor
Akihiko c/o Isuzu Motors Ltd Minato
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.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
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 Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Publication of EP0971119A2 publication Critical patent/EP0971119A2/en
Publication of EP0971119A3 publication Critical patent/EP0971119A3/en
Application granted granted Critical
Publication of EP0971119B1 publication Critical patent/EP0971119B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D41/2096—Output circuits, e.g. for controlling currents in command coils for controlling piezoelectric injectors
    • 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
    • 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
    • F02M63/0012—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
    • 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
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/31—Control of the fuel pressure
    • 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
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements

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)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

A common-rail fuel-injection system is disclosed, in which varying the effective stroke of an actuator-operated valve (42) results in adjusting an amount of fuel leaking out of a pressure-control chamber (40), thereby controlling the fuel injection in compliance with the engine operating conditions. When the lift of the valve (42) is small and therefore the opening area of the valve (42) is less than the cross-sectioned area of a fuel leakage path (41), the leakage of high-pressure fuel out of the pressure is defined by the lift of the valve (42). According to the pressure fall in the pressure-control chamber (40), the lift of a needle valve (24) is regulated to thereby control the fuel-injection rating, namely, the quantity of fuel injected and the rate of change of the fuel-injection rating. An exciting signal applied to the actuator (65) to operate the its associated valve is determined in accordance with a desired fuel-injection rating or the like, which is found in compliance with the engine operating conditions.
EP19990305441 1998-07-08 1999-07-08 Common-rail fuel-injection system Expired - Lifetime EP0971119B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10193488A JP2000027725A (en) 1998-07-08 1998-07-08 Common rail type fuel injection device
JP19348898 1998-07-08

Publications (3)

Publication Number Publication Date
EP0971119A2 EP0971119A2 (en) 2000-01-12
EP0971119A3 true EP0971119A3 (en) 2002-02-13
EP0971119B1 EP0971119B1 (en) 2004-09-22

Family

ID=16308879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990305441 Expired - Lifetime EP0971119B1 (en) 1998-07-08 1999-07-08 Common-rail fuel-injection system

Country Status (3)

Country Link
EP (1) EP0971119B1 (en)
JP (1) JP2000027725A (en)
DE (1) DE69920338T2 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6079641A (en) 1998-10-13 2000-06-27 Caterpillar Inc. Fuel injector with rate shaping control through piezoelectric nozzle lift
DE19936944A1 (en) * 1999-08-05 2001-02-08 Bosch Gmbh Robert Method for metering fuel using a fuel injector
DE10014737A1 (en) 2000-03-24 2001-10-11 Bosch Gmbh Robert Method for determining the rail pressure of an injection valve with a piezoelectric actuator
DE10044120A1 (en) * 2000-09-07 2002-04-04 Bosch Gmbh Robert Common Rail System
FR2823534B1 (en) 2001-04-12 2003-10-03 Power System METHOD FOR INCREASING THE POWER AND TORQUE OF A DIESEL ENGINE WITH INJECTION SYSTEM AND DEVICE FOR IMPLEMENTING THE METHOD
DE10205749A1 (en) * 2002-02-12 2003-08-21 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
DE10231582A1 (en) 2002-07-11 2004-01-29 Daimlerchrysler Ag Method for operating an internal combustion engine
DE10239614A1 (en) * 2002-08-29 2004-03-11 Robert Bosch Gmbh Method for operating a fuel injection system, computer program and control and / or regulating device for operating a fuel injection system and internal combustion engine
DE102007053156A1 (en) * 2007-11-08 2009-05-20 Man Diesel Se Fuel injection system
JP5358621B2 (en) 2011-06-20 2013-12-04 日立オートモティブシステムズ株式会社 Fuel injection device
JP5857980B2 (en) * 2013-02-06 2016-02-10 株式会社日本自動車部品総合研究所 solenoid valve
JP6463638B2 (en) * 2015-01-20 2019-02-06 株式会社Ｓｏｋｅｎ Control device for fuel injection valve
WO2019109825A1 (en) * 2017-12-07 2019-06-13 天津盛欧美发动机技术有限公司 Common-rail fuel injector for diesel engine
CN113202669B (en) * 2021-06-10 2022-07-15 哈尔滨工程大学 Multi-objective optimization method for performance of electric control oil injector
CN114165373A (en) * 2021-12-17 2022-03-11 中国船舶重工集团公司第七一一研究所 Fuel injector and common rail system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133645A (en) * 1990-07-16 1992-07-28 Diesel Technology Corporation Common rail fuel injection system
US5713326A (en) * 1995-05-03 1998-02-03 Institut Fur Motorenbau Prof. Huber Gmbh Injection nozzle
EP0826876A1 (en) * 1996-08-31 1998-03-04 Isuzu Motors Limited A fuel injection device for engines
EP0829641A2 (en) * 1996-08-31 1998-03-18 Isuzu Motors Limited A fuel injection device for engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5133645A (en) * 1990-07-16 1992-07-28 Diesel Technology Corporation Common rail fuel injection system
US5713326A (en) * 1995-05-03 1998-02-03 Institut Fur Motorenbau Prof. Huber Gmbh Injection nozzle
EP0826876A1 (en) * 1996-08-31 1998-03-04 Isuzu Motors Limited A fuel injection device for engines
EP0829641A2 (en) * 1996-08-31 1998-03-18 Isuzu Motors Limited A fuel injection device for engines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RUMPHORST M: "EIN NEUES ELEKTRONISCHES HOCHDRUCK-EINSPRITZSYSTEM FUR DIESELMOTOREN A NEW ELECTRONIC HIGH PRESSURE INJECTION SYSTEM", MTZ MOTORTECHNISCHE ZEITSCHRIFT, FRANCKH'SCHE VERLAGSHANDLUNG,ABTEILUNG TECHNIK. STUTTGART, DE, vol. 56, no. 3, 1 March 1995 (1995-03-01), pages 142 - 148, XP000490673, ISSN: 0024-8525 *

Also Published As

Publication number Publication date
DE69920338T2 (en) 2005-10-06
JP2000027725A (en) 2000-01-25
EP0971119A2 (en) 2000-01-12
DE69920338D1 (en) 2004-10-28
EP0971119B1 (en) 2004-09-22

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