EP0643210A1 - Méthode pour changer postérieurement une vitesse de ralenti - Google Patents

Méthode pour changer postérieurement une vitesse de ralenti Download PDF

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Publication number
EP0643210A1
EP0643210A1 EP93114740A EP93114740A EP0643210A1 EP 0643210 A1 EP0643210 A1 EP 0643210A1 EP 93114740 A EP93114740 A EP 93114740A EP 93114740 A EP93114740 A EP 93114740A EP 0643210 A1 EP0643210 A1 EP 0643210A1
Authority
EP
European Patent Office
Prior art keywords
speed
air
nmin
idle
minimum
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
EP93114740A
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German (de)
English (en)
Other versions
EP0643210B1 (fr
Inventor
Bernhard Dipl.-Ing. Bauer (Fh)
Wolfgang Dipl.-Ing. Reupke
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 DE59304551T priority Critical patent/DE59304551D1/de
Priority to EP19930114740 priority patent/EP0643210B1/fr
Priority to JP24492694A priority patent/JPH0797951A/ja
Publication of EP0643210A1 publication Critical patent/EP0643210A1/fr
Application granted granted Critical
Publication of EP0643210B1 publication Critical patent/EP0643210B1/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
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass

Definitions

  • the invention relates to a method for subsequently changing the idle speed in engine control systems which have an idle speed control.
  • the idle speed is checked at idle. This is usually done via a continuous actuator that adjusts the amount of combustion air supplied to the engine in idle and in the area close to idle (idle air actuator).
  • the intake air throughput is controlled, as described, for example, in DE 30 19 608, depending on the engine operating conditions, either in feedback or with an open control loop.
  • the intake air quantity required depending on the engine operating conditions is also adjusted to the air value by means of a pilot control in the area of the idle control, which roughly corresponds to the value actually required.
  • the fine adjustment is then carried out by means of a speed control, which controls the idle air actuator as a function of the difference between the actual and target speed.
  • the air pilot value for the idle air volume must also be adjusted for each new speed to be set.
  • the object of the present invention is therefore to provide a simple and space-saving method which makes it possible to subsequently increase the originally specified idling speed.
  • This task is solved by specifying a minimum idling speed, which is valid for all engine operating parameters, a so-called “minimum speed”.
  • This minimum speed is stored in a non-volatile memory that can be changed from outside (for example, a so-called EEPROM). If the engine operating parameters are such that the target speed is higher than this minimum speed, the idling speed is set to this higher value. Otherwise, the idle speed is set to this minimum speed value.
  • An additional air pre-control based on an impressed minimum speed must not have the same effect in all speed ranges. For example, in the middle and upper speed range, it would unfavorably delay the speed curves when shifting.
  • the air pre-control values can only be increased by specifying a minimum speed in the speed range close to the minimum speed.
  • the additive air value is calculated depending on the difference between the minimum speed and the idle speed setpoint stored in the memory.
  • the additive air value at higher speed is reduced via parameter B.
  • Both parameters are linked in a two-dimensional map.
  • FIG. 3 shows an example of the course of the additive air values ALW as a function of the engine speed N and Difference between the minimum speed NMIN and the target speed NSOLL.
  • the target speed NSOLL is to be understood here to mean the speed that results when the idle air actuator is controlled with the amount of air that has been determined from characteristic diagrams as a function of the coolant temperature and any additional engine loads.
  • the amount of additive air ALW increases with increasing difference NDIFF between minimum speed NMIN and target speed NSOLL, in order to be able to maintain the minimum speed when these speeds differ from one another.
  • the amount of additive air ALW falls with increasing engine speed N, since an increase in the amount of air is desired only in the area near idling.
  • FIG. 4 finally shows schematically the sequence of the method according to the invention.
  • a basic air value BLW is read out from a map in method step S1 as a function of the current speed N of the internal combustion engine and the current throttle valve angle ⁇ .
  • an additional air value ZTLW is obtained from a further map, which depends on the coolant temperature TKW and any additional loads that are currently switched on, such as an air conditioning system.
  • step S3 a temperature and load-corrected air value TLW is formed from the sum of the basic air value BSW and the additional air value ZTLW.
  • the setpoint idling speed NSOLL is determined from a characteristic diagram in method step S4 as a function of the coolant temperature TKW and the additional loads that are currently switched on.
  • step S5 the speed difference NDIFF is now formed by, for example, the one predefined from the outside Minimum speed NMIN subtracts the idling target speed NSOLL determined above.
  • an additive air value ALW depending on the size of the speed difference NDIFF and depending on the current speed is now read from a map. If the minimum speed NMIN is less than or equal to the target speed NSOLL, this additive air value ALW is zero.
  • this additive air value ALW is added to the previously calculated air value TLW, so that the total air value GLW is obtained.
  • step S8 the idle air actuator is then controlled in accordance with the determined total air value GLW.

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)
EP19930114740 1993-09-14 1993-09-14 Méthode pour changer postérieurement une vitesse de ralenti Expired - Lifetime EP0643210B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE59304551T DE59304551D1 (de) 1993-09-14 1993-09-14 Verfahren zur nachträglichen Veränderung der Leerlaufdrehzahl
EP19930114740 EP0643210B1 (fr) 1993-09-14 1993-09-14 Méthode pour changer postérieurement une vitesse de ralenti
JP24492694A JPH0797951A (ja) 1993-09-14 1994-09-14 アイドリング回転数を事後補足的に変化させる方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19930114740 EP0643210B1 (fr) 1993-09-14 1993-09-14 Méthode pour changer postérieurement une vitesse de ralenti

Publications (2)

Publication Number Publication Date
EP0643210A1 true EP0643210A1 (fr) 1995-03-15
EP0643210B1 EP0643210B1 (fr) 1996-11-20

Family

ID=8213258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930114740 Expired - Lifetime EP0643210B1 (fr) 1993-09-14 1993-09-14 Méthode pour changer postérieurement une vitesse de ralenti

Country Status (3)

Country Link
EP (1) EP0643210B1 (fr)
JP (1) JPH0797951A (fr)
DE (1) DE59304551D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997022790A1 (fr) * 1995-12-15 1997-06-26 Orbital Engine Company (Australia) Pty. Limited Gestion de l'alimentation en carburant d'un moteur a combustion interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2051420A (en) * 1979-04-24 1981-01-14 Nissan Motor Intake air flow control system to control idling speed of an internal combustion engine
WO1986001257A1 (fr) * 1984-08-09 1986-02-27 Robert Bosch Gmbh Procede et dispositif pour commander et/ou regler le nombre de tours en marche a vide d'un moteur a combustion interne
US4611560A (en) * 1983-04-08 1986-09-16 Mitsubishi Denki Kabushiki Kaisha Idling speed control system of an internal combustion engine
US4691675A (en) * 1985-07-11 1987-09-08 Mazda Motor Corp. Idling speed control systems for internal combustion engines
EP0459006A1 (fr) * 1990-06-01 1991-12-04 Siemens Aktiengesellschaft Dispositif pour commander l'angle d'ouverture d'un régleur de mélange de ralenti

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2051420A (en) * 1979-04-24 1981-01-14 Nissan Motor Intake air flow control system to control idling speed of an internal combustion engine
US4611560A (en) * 1983-04-08 1986-09-16 Mitsubishi Denki Kabushiki Kaisha Idling speed control system of an internal combustion engine
WO1986001257A1 (fr) * 1984-08-09 1986-02-27 Robert Bosch Gmbh Procede et dispositif pour commander et/ou regler le nombre de tours en marche a vide d'un moteur a combustion interne
US4691675A (en) * 1985-07-11 1987-09-08 Mazda Motor Corp. Idling speed control systems for internal combustion engines
EP0459006A1 (fr) * 1990-06-01 1991-12-04 Siemens Aktiengesellschaft Dispositif pour commander l'angle d'ouverture d'un régleur de mélange de ralenti

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997022790A1 (fr) * 1995-12-15 1997-06-26 Orbital Engine Company (Australia) Pty. Limited Gestion de l'alimentation en carburant d'un moteur a combustion interne
US5970954A (en) * 1995-12-15 1999-10-26 Orbital Engine Company (Australia) Pty Limited Control of fueling of an internal combustion engine

Also Published As

Publication number Publication date
JPH0797951A (ja) 1995-04-11
DE59304551D1 (de) 1997-01-02
EP0643210B1 (fr) 1996-11-20

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