EP1122418A2 - Procédé pour l'adaptation de pression d'injection maximale dans un accumulateur à haute pression - Google Patents

Procédé pour l'adaptation de pression d'injection maximale dans un accumulateur à haute pression Download PDF

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Publication number
EP1122418A2
EP1122418A2 EP01100564A EP01100564A EP1122418A2 EP 1122418 A2 EP1122418 A2 EP 1122418A2 EP 01100564 A EP01100564 A EP 01100564A EP 01100564 A EP01100564 A EP 01100564A EP 1122418 A2 EP1122418 A2 EP 1122418A2
Authority
EP
European Patent Office
Prior art keywords
pressure
injection
injection pressure
injectors
pressure accumulator
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
EP01100564A
Other languages
German (de)
English (en)
Other versions
EP1122418A3 (fr
EP1122418B1 (fr
Inventor
Thomas Frenz
Peter Klee
Hansjoerg Bochum
Winfried Langer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1122418A2 publication Critical patent/EP1122418A2/fr
Publication of EP1122418A3 publication Critical patent/EP1122418A3/fr
Application granted granted Critical
Publication of EP1122418B1 publication Critical patent/EP1122418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1406—Introducing closed-loop corrections characterised by the control or regulation method with use of a optimisation method, e.g. iteration
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • 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
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • 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

Definitions

  • the present invention relates to a method for Adaptation of one in a high pressure accumulator
  • a direct injection fuel metering system Internal combustion engine prevailing maximum injection pressure, several of the high-pressure accumulators Controllable injectors depending on the operating size Metering fuel from the high pressure accumulator in Branch off the combustion chambers of the internal combustion engine.
  • the fuel metering system is, for example, as a common rail gasoline direct injection system with a pre-feed pump and a demand-driven or demand-controlled one High pressure pump trained.
  • the present invention can but also with direct-injection diesel engines be used.
  • the pre-feed pump is designed, for example, as an electric fuel pump and feeds fuel from a fuel reservoir into a low pressure area of the fuel metering system. By doing Low pressure range is a pre-pressure of 4 bar, for example.
  • the high pressure pump delivers the fuel from the Low pressure area in the high pressure accumulator in one High pressure area of the fuel metering system. By doing High pressure accumulator is dependent on the operating state of the Internal combustion engine a pressure between about 50 and 120 bar regulated.
  • the branches of the high pressure accumulator depending on the operating size controllable injectors with appropriate control, the fuel from the High-pressure accumulator with the injection pressure there inject into the combustion chambers of the internal combustion engine.
  • the high pressure injectors of a fuel metering system open a direct-injection gasoline engine after activation by magnetic force.
  • the magnetic force is generated by an electromagnet that is part of the Injector is. Is not activated the injector closed; a sealing element of the Injector is placed on a spring element Valve seat pressed.
  • a sealing element of the Injector is placed on a spring element Valve seat pressed.
  • the spring force of the Spring element and the hydraulic force in the High pressure accumulator prevailing injection pressure overcome become.
  • the electromagnet is in practice with voltages operated that are significantly higher than that The battery voltage of the vehicle battery is (so-called booster mode).
  • Solving injectors can be the maximum Injection pressure to which is regulated in the High pressure accumulator can be reduced so far that under Taking into account all manufacturing tolerances and the Wear of the injectors with all injectors Open security and throughout the given Keep injection duration open. With such a set injection pressure can save the resources of a However, the fuel metering system has not been optimally used become.
  • the initial pressure at which the injection pressure in the High-pressure accumulator at the beginning of the invention is set, for example Injection pressure, which according to the prior art in the High pressure accumulator is set.
  • the initial pressure can selected the same size for internal combustion engines of the same type become.
  • Initial pressure is an optimal use of resources of the fuel metering system is not possible.
  • the injection pressure becomes in the high pressure accumulator in the operating points where the maximum injection pressure is required increased.
  • the pressure is preferably increased continuously. At the same time it is checked whether the injection valves open. As long as open all injectors, the injection pressure further increased.
  • the injection pressure no longer increases elevated. Based on the achieved at that time Injection pressure then becomes one predetermined amount decreased.
  • the default amount is chosen so that at the reduced injection pressure all Open injectors. It is also conceivable that the Injection pressure based on the injection pressure reached is slowly reduced until all the injectors again to open. In this case, the predetermined amount would be variable. The reduced injection pressure will eventually as the maximum injection pressure of the high-pressure accumulator used.
  • maximum injection pressure in the high pressure accumulator on the one hand be chosen so low that all injectors are still open the fuel metering system with certainty.
  • the injection pressure is chosen so high that optimal use of the resources of the Fuel metering system is guaranteed.
  • the maximum Injection pressure of the high pressure accumulator for each one Customized fuel metering system is guaranteed. This allows also manufacturing tolerances and wear of the Injectors in every fuel metering system be considered individually. So for everyone single internal combustion engine smooth running Internal combustion engine and a consistently good one Emission behavior while using the full Resources of the fuel metering system are guaranteed.
  • the initial pressure be set in this way will that considering all Manufacturing tolerances and wear of the Injectors all injectors with certainty to open. Should the implementation of the the method according to the invention nevertheless terminate the case, that at least one of the injectors in the Initial pressure does not open, so this injector, the fuel metering system or the whole Internal combustion engine classified as faulty and repaired or replaced.
  • a message be output if the maximum injection pressure of the High pressure storage below a predeterminable Pressure threshold.
  • a message is issued if the adapted maximum Injection pressure above the initial pressure but below a predefinable pressure threshold.
  • This message can either a control unit of an internal combustion engine Further processing can be supplied. Or the message becomes an outside person for further processing or to initiate appropriate steps.
  • the Message can be, for example, as an optical or acoustic Error message or as a display of adapt maximum injection pressure.
  • the process according to the invention is advantageously carried out according to assembly or repair, especially after Exchange of at least one fuel injector, the Fuel metering system performed.
  • One of external signal a special operating state force the internal combustion engine in which, for. B. idle maximum injection pressure is required and the adaptation once, regardless of the operating point.
  • the method be predefined time intervals, especially after a specifiable Number of driving cycles or after a specifiable one Operating time.
  • the maximum injection pressure is dependent on aging and wear Changes in the injection valves and / or changes in the pressure-controlling or pressure-regulating parts of the Fuel metering system set. The changes are made with such a large time constant that an adaptation of the maximum injection pressure in relatively large temporal Intervals, for example monthly, is completely sufficient.
  • Procedure is carried out at the end of the line.
  • the inventive method shown in Figure 1 is used to adapt one in a high pressure accumulator Fuel metering system of a direct-injection gasoline engine prevailing maximum injection pressure.
  • Several branches of the high-pressure accumulator Controllable injectors depending on the operating size for metering fuel from the high pressure accumulator in Combustion chambers of the internal combustion engine serve.
  • the method according to the invention is carried out when the internal combustion engine is in an operating state, in which the maximum injection pressure is required.
  • the process begins in function block 1.
  • a subsequent function block 2 becomes a specific one Injection pressure as the initial pressure in the high pressure accumulator certainly.
  • the initial pressure is determined such that under Taking into account all manufacturing tolerances and the Wear of the injectors with all injectors Open security.
  • a targeted requirement for example by a workshop that Initial pressure set in the high pressure accumulator.
  • the queue is exited as soon as the internal combustion engine is in an operating state in which the maximum injection pressure is required.
  • a query block 4 It is then checked in a query block 4 whether the in the injection pressure set in the high pressure accumulator all Open injectors. If all injectors open, the injection pressure is in a function block 5 increased by an increment in the high-pressure accumulator. It is then checked again in the query block 4, whether all injectors open. The injection pressure will as long as increased by one increment, or the loop consisting of the query block 4 and the function block 5 is run through until at least one of the Injector no longer opens.
  • Function block 6 branches where the injection pressure in the High pressure accumulator is reduced by one increment.
  • For Security is still in a subsequent query block 7 once checked whether all injectors again to open. If not, the function block becomes 6 branches where the injection pressure again by one Increment is decreased. The loop consisting of the Function block 6 and the query block 7 will last run until all injectors open again. Then is branched into a function block 8, where the now in injection pressure set as high pressure accumulator maximum injection pressure of the high pressure accumulator is used.
  • a final function block 9 the method according to the invention has ended. Furthermore the procedure is always ended when the Injection pressure in the high pressure accumulator due to the Operating state of the internal combustion engine the maximum Leaves print area.
  • the method according to the invention can be installed after the Internal combustion engine at the end of the line or after repair, especially after replacing at least one Injector, fuel metering system or Internal combustion engine are running. Alternatively, it can Procedures but also at predefinable time intervals especially after a predeterminable number of driving cycles or after a predefinable operating time become.

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)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP01100564A 2000-02-05 2001-01-10 Procédé pour l'adaptation de pression d'injection maximale dans un accumulateur à haute pression Expired - Lifetime EP1122418B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10005208 2000-02-05
DE10005208A DE10005208A1 (de) 2000-02-05 2000-02-05 Verfahren zur Adaption des maximalen Einspritzdrucks in einem Hochdruckspeicher

Publications (3)

Publication Number Publication Date
EP1122418A2 true EP1122418A2 (fr) 2001-08-08
EP1122418A3 EP1122418A3 (fr) 2003-01-22
EP1122418B1 EP1122418B1 (fr) 2004-05-26

Family

ID=7630017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01100564A Expired - Lifetime EP1122418B1 (fr) 2000-02-05 2001-01-10 Procédé pour l'adaptation de pression d'injection maximale dans un accumulateur à haute pression

Country Status (5)

Country Link
EP (1) EP1122418B1 (fr)
JP (1) JP2001241351A (fr)
KR (1) KR100730664B1 (fr)
DE (2) DE10005208A1 (fr)
ES (1) ES2220595T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501459A2 (fr) * 1991-02-27 1992-09-02 Nippondenso Co., Ltd. Système d'injection avec rampe à carburant commune et méthode à cet effet
DE19622757A1 (de) * 1995-11-09 1997-05-15 Bosch Gmbh Robert Verfahren und Vorrichtung zur Erkennung einer Leckage in einem Kraftstoffversorgungssystem einer Brennkraftmaschine mit Hochdruckeinspritzung
DE19626689C1 (de) * 1996-07-03 1997-11-20 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Einspritzsystems
EP0860600A2 (fr) * 1997-02-21 1998-08-26 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421088A (en) * 1980-07-03 1983-12-20 Lucas Industries Limited Fuel system for compression ignition engine
US5492099A (en) * 1995-01-06 1996-02-20 Caterpillar Inc. Cylinder fault detection using rail pressure signal
JP3995118B2 (ja) * 1995-11-09 2007-10-24 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 高圧燃料噴射装置付き内燃機関における燃料供給系の漏れ識別方法及び装置
DE19624001A1 (de) * 1996-06-15 1997-12-18 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE29706625U1 (de) * 1997-04-12 1997-08-14 Schmidt, Ernst W., 83457 Bayerisch Gmain Elektronisch - magnetisch betätigte Einspritzdüse
FR2775318B1 (fr) * 1998-02-26 2000-04-28 Sagem Module d'injection multi-points pour moteur a combustion interne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501459A2 (fr) * 1991-02-27 1992-09-02 Nippondenso Co., Ltd. Système d'injection avec rampe à carburant commune et méthode à cet effet
DE19622757A1 (de) * 1995-11-09 1997-05-15 Bosch Gmbh Robert Verfahren und Vorrichtung zur Erkennung einer Leckage in einem Kraftstoffversorgungssystem einer Brennkraftmaschine mit Hochdruckeinspritzung
DE19626689C1 (de) * 1996-07-03 1997-11-20 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Einspritzsystems
EP0860600A2 (fr) * 1997-02-21 1998-08-26 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne

Also Published As

Publication number Publication date
JP2001241351A (ja) 2001-09-07
DE10005208A1 (de) 2001-08-16
ES2220595T3 (es) 2004-12-16
EP1122418A3 (fr) 2003-01-22
DE50102369D1 (de) 2004-07-01
KR100730664B1 (ko) 2007-06-22
EP1122418B1 (fr) 2004-05-26
KR20010078311A (ko) 2001-08-20

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