EP0593800B1 - Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge - Google Patents

Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge Download PDF

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Publication number
EP0593800B1
EP0593800B1 EP92117861A EP92117861A EP0593800B1 EP 0593800 B1 EP0593800 B1 EP 0593800B1 EP 92117861 A EP92117861 A EP 92117861A EP 92117861 A EP92117861 A EP 92117861A EP 0593800 B1 EP0593800 B1 EP 0593800B1
Authority
EP
European Patent Office
Prior art keywords
control
internal combustion
full load
combustion engine
mixture
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.)
Expired - Lifetime
Application number
EP92117861A
Other languages
German (de)
English (en)
Other versions
EP0593800A1 (fr
Inventor
Bernhard Dipl.-Ing. Bauer (Fh)
Ludwig Dipl.-Ing. Kettl (Fh)
Stefan Dr.-Ing. Krebs
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 EP92117861A priority Critical patent/EP0593800B1/fr
Priority to DE59204860T priority patent/DE59204860D1/de
Priority to US08/139,194 priority patent/US5357937A/en
Priority to JP5283948A priority patent/JPH06193492A/ja
Publication of EP0593800A1 publication Critical patent/EP0593800A1/fr
Application granted granted Critical
Publication of EP0593800B1 publication Critical patent/EP0593800B1/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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/10—Introducing corrections for particular operating conditions for acceleration
    • 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
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1486—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor with correction for particular operating conditions
    • F02D41/1488—Inhibiting the regulation

Definitions

  • the invention relates to a method for operating an internal combustion engine in full load operation according to the preamble of claim 1.
  • the mixture pilot control may turn out to be lean due to incorrect detection of the air mass flow.
  • Such erroneous measured values can occur, for example, if they are recorded using quickly responding air measuring devices such as hot film air mass meters or hot wire air mass meters. Due to the high response speed, the output signal of the air measuring device follows every pulsation in the air flow. As soon as such pulsations occur, the air measuring device may no longer provide correct measured values that could be used for the mixture preparation. Even the control system cannot compensate for such faulty load detection since it is switched off in this operating state of the internal combustion engine.
  • a method for improving the mixture control during special operating states of an internal combustion engine is specified in WO 91/05153.
  • the ⁇ control remains switched on even during control operation with a limited control range and the ⁇ controller is asymmetrically effective during these special operating states, so that it regulates the fuel-air mixture only in the "rich" direction.
  • the object of the present invention is to provide a method for operating an internal combustion engine operating with air mass-guided injection, which ensures at least a stoichiometric mixture even when the air mass flow is detected incorrectly in full-load operation.
  • An injection valve 14 is assigned to each cylinder of the internal combustion engine 10, only one of which is shown.
  • the injection valves are parts of a fuel circuit, not shown, which in a manner known per se consists of a storage tank, a pressure regulator, a fuel pump, a fuel filter and corresponding lines.
  • the internal combustion engine 10 receives the combustion air via an air filter 22, an intake duct 11 and a throttle valve 25.
  • an intake air temperature sensor 20 and an air mass meter 21 are also provided in the intake duct 11, an intake air temperature sensor 20 and an air mass meter 21 are also provided. This air mass meter can be implemented either as a hot film air mass meter or as a hot wire air mass meter.
  • a position sensor 15 is assigned, which generates a signal corresponding to the throttle valve opening angle.
  • the position sensor 15 can be a throttle valve switch which triggers regardless of the speed at a predetermined throttle valve opening angle or is triggered if the throttle valve opening angle is greater than a predetermined throttle valve opening angle depending on the speed of the internal combustion engine.
  • a three-way catalytic converter 23 is provided in an exhaust gas duct 12 for separating out the constituents HC, CO and NO x contained in the exhaust gases. To detect the oxygen concentration in the exhaust gas, a ⁇ probe is inserted in the exhaust duct 12 upstream of the three-way catalytic converter.
  • a speed sensor 17 for detecting the engine speed and a coolant temperature sensor 19 are provided at suitable points on the internal combustion engine.
  • the outputs of the sensors mentioned and the inputs of the actuators mentioned are connected via interfaces to corresponding inputs and outputs of an electronic control device 13.
  • Such electronic control devices for internal combustion engines which in addition to fuel injection can also perform a variety of other tasks (eg ignition control), are known per se, so that only the structure and the mode of operation associated with the present invention are dealt with below .
  • the heart of the electronic control device 13 is a microcomputer which controls the required functions according to a defined program.
  • a first step S1 checks whether the ⁇ probe is ready for operation and whether the ⁇ control can be released at all if necessary. If the probe temperature TS is lower than the probe operating temperature TSB, the internal combustion engine continues to be operated with a mixture control. However, if the ⁇ probe has already reached its operating temperature TSB, a check is carried out in a second step S2 to determine whether the internal combustion engine is operating at full load. For this purpose, the opening angle of the throttle valve and the speed of the machine are evaluated. If the throttle valve opening angle DKW exceeds a predetermined limit value DKWG, it is concluded that full-load operation.
  • the ⁇ control is switched off in step S3 if it was previously switched on, and the output signal when the ⁇ control is switched off US of the ⁇ probe US continuously recorded and evaluated, ie compared with fat or lean threshold values.
  • step S4 it is checked whether, based on this evaluation, the mixture state "lean" is present for a time tm greater than a defined time tg. If this is not the case, the ⁇ control remains switched off and step S3 is carried out repeatedly. In the other case, the mixture is leaned out in full load operation and in step S5 the ⁇ control is released for at least a defined number of mixture state changes (rich to lean or lean to rich). It remains released until, in a step S6, the query as to whether the mean value MW of the ⁇ controller value indicates a rich basic mixture gives a positive result. This means that the internal combustion engine is operated again with the rich mixture desired for full-load operation and the ⁇ control can be switched off again in step S3, the output signal US of the ⁇ probe being monitored further.

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)

Claims (2)

  1. Procédé pour faire fonctionner un moteur à combustion interne à pleine charge
    - comprenant un dispositif de régulation λ, qui comporte une sonde λ (16) et un régulateur λ qui, en fonction du signal de sortie (US) de la sonde λ (16) règle, en dehors du fonctionnement à pleine charge, le mélange carburant - air devant être envoyé au moteur à combustion interne, sur une valeur de consigne (λ = 1),
    - et un dispositif de commande du mélange, qui pendant le fonctionnement à pleine charge du moteur à combustion interne et lorsque la régulation λ est débranchée, règle le mélange carburant-air sur une valeur (λ<1) inférieure à la valeur de consigne,
    caractérisé en ce que
    - lorsque la régulation λ est débranchée, le signal de sortie de la sonde λ (16) est détecté en permanence et est comparé à une valeur de seuil de mélange riche ou pauvre,
    - la régulation λ est libérée au moins pour un nombre pouvant être sélectionné d'alternances d'état du mélange, de riche à pauvre et de pauvre à riche, lorsque, pendant un intervalle de temps (tm) supérieur à une valeur prédéterminée, le signal de sortie (US) de la sonde λ (16) tombe au-dessous de la valeur de seuil de mélange maigre,
    - la régulation λ reste libérée jusqu'à ce que la valeur moyenne (MW) de la valeur du régulateur λ indique un mélange de base riche.
  2. Procédé selon la revendication 1, caractérisé en ce qu'on utilise, comme critère de débranchement de la régulation λ, lors du passage au fonctionnement à pleine charge, la position du papillon des gaz (25) et que, lorsque le papillon des gaz est dévié au-delà d'un angle d'ouverture prédéterminé (DKWG), on conclut à un fonctionnement à pleine charge.
EP92117861A 1992-10-19 1992-10-19 Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge Expired - Lifetime EP0593800B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92117861A EP0593800B1 (fr) 1992-10-19 1992-10-19 Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge
DE59204860T DE59204860D1 (de) 1992-10-19 1992-10-19 Verfahren zum Betrieb einer Brennkraftmaschine im Vollastbetrieb
US08/139,194 US5357937A (en) 1992-10-19 1993-10-19 Method for operating an internal combustion engine under full load
JP5283948A JPH06193492A (ja) 1992-10-19 1993-10-19 全負荷運転における内燃機関の作動方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92117861A EP0593800B1 (fr) 1992-10-19 1992-10-19 Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge

Publications (2)

Publication Number Publication Date
EP0593800A1 EP0593800A1 (fr) 1994-04-27
EP0593800B1 true EP0593800B1 (fr) 1995-12-27

Family

ID=8210152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117861A Expired - Lifetime EP0593800B1 (fr) 1992-10-19 1992-10-19 Méthode pour l'exploitation d'un moteur à combustion interne à pleine charge

Country Status (4)

Country Link
US (1) US5357937A (fr)
EP (1) EP0593800B1 (fr)
JP (1) JPH06193492A (fr)
DE (1) DE59204860D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6076510A (en) * 1998-05-22 2000-06-20 Hyundai Motor Co. Method and apparatus for correcting air-flow sensor output and adapting data map used to control engine operating parameters
DE10221380A1 (de) * 2002-05-14 2003-11-27 Bosch Gmbh Robert Verfahren und Vorrichtung zur Regelung einer Betriebskenngröße in einem Kraftfahrzeug
EP2013464B1 (fr) * 2006-04-18 2009-12-23 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Procédé pour régler le rapport air-carburant d'un moteur à combustion interne

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5799254A (en) * 1980-10-23 1982-06-19 Fuji Heavy Ind Ltd Air-fuel ratio control device
JPS58104336A (ja) * 1981-12-16 1983-06-21 Toyota Motor Corp 電子制御燃料噴射式内燃機関の暖機加速増量方法
JPS58124044A (ja) * 1982-01-21 1983-07-23 Nippon Denso Co Ltd 内燃機関の空燃比制御装置
JPS5996454A (ja) * 1982-11-24 1984-06-02 Mazda Motor Corp エンジンの空燃比制御装置
JPS61206953A (ja) * 1985-03-08 1986-09-13 Sharp Corp 磁気記録再生装置に於ける記録速度判別方法及びその装置
JPH0286936A (ja) * 1988-09-22 1990-03-27 Honda Motor Co Ltd 内燃エンジンの空燃比フィードバック制御方法
US5016596A (en) * 1989-05-01 1991-05-21 Honda Giken Kogyo K.K. Air-fuel ratio control method for internal combustion engines
JP2688670B2 (ja) * 1989-08-07 1997-12-10 本田技研工業株式会社 内燃エンジンの空燃比フィードバック制御方法
US5279275A (en) * 1989-10-05 1994-01-18 Siemens Aktiengesellschaft Process for operating an internal combustion engine
US5067465A (en) * 1990-02-15 1991-11-26 Fujitsu Ten Limited Lean burn internal combustion engine

Also Published As

Publication number Publication date
DE59204860D1 (de) 1996-02-08
JPH06193492A (ja) 1994-07-12
US5357937A (en) 1994-10-25
EP0593800A1 (fr) 1994-04-27

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