EP0643214A1 - Correction de la durée d'injection au démarrage - Google Patents

Correction de la durée d'injection au démarrage Download PDF

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Publication number
EP0643214A1
EP0643214A1 EP93114840A EP93114840A EP0643214A1 EP 0643214 A1 EP0643214 A1 EP 0643214A1 EP 93114840 A EP93114840 A EP 93114840A EP 93114840 A EP93114840 A EP 93114840A EP 0643214 A1 EP0643214 A1 EP 0643214A1
Authority
EP
European Patent Office
Prior art keywords
air
correction factor
outside air
internal combustion
starting
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
EP93114840A
Other languages
German (de)
English (en)
Other versions
EP0643214B1 (fr
Inventor
Michael Dipl.-Ing.- Südholt
Manfred Dr.-Ing. Wier
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP93114840A priority Critical patent/EP0643214B1/fr
Priority to DE59307175T priority patent/DE59307175D1/de
Priority to US08/306,758 priority patent/US5577483A/en
Priority to JP6246748A priority patent/JPH0797944A/ja
Publication of EP0643214A1 publication Critical patent/EP0643214A1/fr
Application granted granted Critical
Publication of EP0643214B1 publication Critical patent/EP0643214B1/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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • 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
    • 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
    • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
    • F02D41/187—Circuit arrangements for generating control signals by measuring intake air flow using a hot wire flow sensor
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions

Definitions

  • the invention relates to a method which makes it possible to adapt the injection time specified for the start of internal combustion engines to the currently prevailing quantities of the outside air.
  • This task is solved by modifying the values for the starting injection time read from the map with an air pressure-dependent correction factor.
  • a pressure gauge can be used for this, with which the outside air pressure is determined directly at the start time.
  • this is quite complex due to the additional outside air pressure meter, which is not provided in conventional engine controls. It is therefore more advantageous to use a value for pressure correction that the engine control system makes available from other control methods. Any value that represents the outside air pressure can be used for this purpose.
  • the engine control makes such a variable representing the outside air pressure available, for example, when calculating the air mass.
  • the air mass flowing into the internal combustion engine is normally measured by an air mass meter.
  • the output signal of the air mass meter follows every pulsation in the air flow. Back-flowing air masses, such as those that occur when the intake air pulsates, are also incorrectly recorded.
  • the measured values are no longer used, but rather preset values from a replacement map, as described in the European application 92108966.0. These values were previously determined on the test bench for a specific outside air pressure (normal pressure). These replacement air values must now also be adjusted to the actual outside air pressure. This is done, as described for example in the European application 92112871.6, by comparing the measured air value with the corresponding replacement air value from the replacement map in pulsation-free times. From this comparison you get a quantity (called adaptation factor) that represents the outside air pressure. The last calculated adaptation factor or the one obtained from the moving averaging Adaptation factor is stored in a non-volatile manner when the internal combustion engine is switched off. When restarted, it then serves as a correction factor for the injection time calculation.
  • method step S1 checks, for example, based on the engine speed whether the internal combustion engine is in the starting phase. If this is not the case, go to normal injection control. However, if the internal combustion engine is in the starting phase, the value for the starting injection time KTI is taken from a map as a function of the cooling water temperature in method step S2. In method step S3, this starting injection time KTI is multiplied by the correction factor KF, which is taken from a memory in which it was stored in a non-volatile manner even after the internal combustion engine was switched off. When the machine is started for the first time, this value KF is set to one.
  • KF LW / LE * TF, where LW, the air value measured by an air meter in the intake tract of the internal combustion engine, LE, the replacement air value stored in a map and TF, a temperature factor, which is calculated according to the formula:
  • the correction value KF last determined is then stored in a non-volatile manner.
  • this corrected injection value is used controlled the injector. Then you go back to the beginning of procedure A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP93114840A 1993-09-15 1993-09-15 Correction de la durée d'injection au démarrage Expired - Lifetime EP0643214B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP93114840A EP0643214B1 (fr) 1993-09-15 1993-09-15 Correction de la durée d'injection au démarrage
DE59307175T DE59307175D1 (de) 1993-09-15 1993-09-15 Korrektur der Starteinspritzzeit
US08/306,758 US5577483A (en) 1993-09-15 1994-09-15 Method for correction of starting injection timing
JP6246748A JPH0797944A (ja) 1993-09-15 1994-09-16 始動噴射時間を外気圧に適合調整する方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93114840A EP0643214B1 (fr) 1993-09-15 1993-09-15 Correction de la durée d'injection au démarrage

Publications (2)

Publication Number Publication Date
EP0643214A1 true EP0643214A1 (fr) 1995-03-15
EP0643214B1 EP0643214B1 (fr) 1997-08-20

Family

ID=8213265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114840A Expired - Lifetime EP0643214B1 (fr) 1993-09-15 1993-09-15 Correction de la durée d'injection au démarrage

Country Status (4)

Country Link
US (1) US5577483A (fr)
EP (1) EP0643214B1 (fr)
JP (1) JPH0797944A (fr)
DE (1) DE59307175D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6032653A (en) * 1995-07-25 2000-03-07 Yamaha Hatsudoki Kabushiki Kaisha Engine control system and method
JP3653919B2 (ja) * 1997-03-04 2005-06-02 日産自動車株式会社 筒内直接噴射式火花点火内燃機関の燃料噴射制御装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864998A (en) * 1987-08-11 1989-09-12 Toyota Jidosha Kabushiki Kaisha Fuel injection system of an internal combustion engine
US4907557A (en) * 1987-10-14 1990-03-13 Mitsubishi Denki Kabushiki Kaisha Fuel injection system for internal combustion engine
US4907556A (en) * 1987-10-14 1990-03-13 Mitsubishi Denki Kabushiki Kaisha Electronic control system for internal combustion engine
EP0478120A2 (fr) * 1990-09-12 1992-04-01 Ford Motor Company Limited Méthode et dispositif pour inférer la pression atmospherique environnante à un moteur à combustion interne

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5596339A (en) * 1979-01-13 1980-07-22 Nippon Denso Co Ltd Air-fuel ratio control method
JPS5865950A (ja) * 1981-10-14 1983-04-19 Nippon Denso Co Ltd 内燃機関の制御方法
JPH0745840B2 (ja) * 1986-01-22 1995-05-17 本田技研工業株式会社 内燃エンジンの空燃比大気圧補正方法
JPH01280662A (ja) * 1988-05-06 1989-11-10 Mitsubishi Electric Corp エンジン制御用大気圧検出装置
DE3925377A1 (de) * 1989-08-01 1991-02-07 Bosch Gmbh Robert Verfahren zur messfehlerkorrektur eines heissfilm-luftmassenmessers
JP2796419B2 (ja) * 1990-10-19 1998-09-10 株式会社日立製作所 電子制御燃料噴射装置
DE59209114D1 (de) * 1992-05-27 1998-02-12 Siemens Ag Messung des pulsierenden Luftmassestroms im Ansaugrohr einer Brennkraftmaschine
DE59306068D1 (de) * 1992-07-28 1997-05-07 Siemens Ag Verfahren zur anpassung der luftwerte aus einem ersatzkennfeld, das bei pulsationen der luft im ansaugrohr einer brennkraftmaschine zur steuerung der gemischaufbereitung verwendet wird, an die aktuell herrschenden zustandsgrössen der aussenluft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864998A (en) * 1987-08-11 1989-09-12 Toyota Jidosha Kabushiki Kaisha Fuel injection system of an internal combustion engine
US4907557A (en) * 1987-10-14 1990-03-13 Mitsubishi Denki Kabushiki Kaisha Fuel injection system for internal combustion engine
US4907556A (en) * 1987-10-14 1990-03-13 Mitsubishi Denki Kabushiki Kaisha Electronic control system for internal combustion engine
EP0478120A2 (fr) * 1990-09-12 1992-04-01 Ford Motor Company Limited Méthode et dispositif pour inférer la pression atmospherique environnante à un moteur à combustion interne

Also Published As

Publication number Publication date
US5577483A (en) 1996-11-26
EP0643214B1 (fr) 1997-08-20
JPH0797944A (ja) 1995-04-11
DE59307175D1 (de) 1997-09-25

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