EP0647775B1 - Dispositif pour régler la vitesse de valenti d'un moteur de véhicule - Google Patents

Dispositif pour régler la vitesse de valenti d'un moteur de véhicule Download PDF

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Publication number
EP0647775B1
EP0647775B1 EP94113276A EP94113276A EP0647775B1 EP 0647775 B1 EP0647775 B1 EP 0647775B1 EP 94113276 A EP94113276 A EP 94113276A EP 94113276 A EP94113276 A EP 94113276A EP 0647775 B1 EP0647775 B1 EP 0647775B1
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EP
European Patent Office
Prior art keywords
catalytic converter
temperature
engine
internal combustion
injection valves
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
EP94113276A
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German (de)
English (en)
Other versions
EP0647775A2 (fr
EP0647775A3 (fr
Inventor
Gerhart Huemer
Heinz Lemberger
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0647775A2 publication Critical patent/EP0647775A2/fr
Publication of EP0647775A3 publication Critical patent/EP0647775A3/fr
Application granted granted Critical
Publication of EP0647775B1 publication Critical patent/EP0647775B1/fr
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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
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor
    • F02D41/1441—Plural sensors
    • F02D41/1443—Plural sensors with one sensor per cylinder or group of cylinders
    • 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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • 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
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • F01N2430/02—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by cutting out a part of engine cylinders

Definitions

  • the invention relates to a device according to the preamble of the claim 1.
  • the internal combustion engine is idling when the motor vehicle is stationary is operated by firing all cylinders, this can be especially in the case of large-volume, four-cylinder internal combustion engines to critical thermal behavior lead if the amount of heat generated by the combustion is missing Airflow through the coolant can not be dissipated.
  • a method for fuel injection is known from DE 36 23 040 A1 which the injection is switched off sequentially in overrun mode. A lifting the injection shutdown due to a low catalyst temperature not known from this document.
  • This object is achieved in a device for idle control of a motor vehicle internal combustion engine with exhaust gas catalytic converter and lambda probe solved in that the means for switching off the injection valves are designed such that the injection valves in idle mode of the internal combustion engine depending on the internal combustion engine firing order can be switched off sequentially according to a specified program are.
  • This embodiment of the invention is also suitable for 6-cylinder internal combustion engines.
  • the exhaust gas catalytic converter does not fall below that for a proper exhaust gas conversion can cool down the required temperature.
  • This has an improved exhaust emission behavior of the internal combustion engine Episode.
  • the invention can, in particular, the thermal behavior in large-volume internal combustion engines in idle mode when the cooling Impact of the airstream is missing, can be significantly improved.
  • the sequential shutdown takes place the injection valves only when the internal combustion engine is idling, if the coolant temperature of the internal combustion engine is greater than 80 ° C and / or the air temperature in the intake air collector is greater than 20 ° C. So that is achieved that the single cylinder shutdown only when the engine is idling when the internal combustion engine is warm and / or when the outside temperature is sufficiently warm he follows.
  • the sequential shutdown of the injection valves only at one Vehicle speed greater than 5 km / h canceled.
  • the temperature of the catalytic converter by measuring or monitoring the electrical voltage of the lambda probe assigned to the exhaust gas catalytic converter.
  • the logic diagram of FIG. 1 shows the functioning of a device for idle control of a motor vehicle internal combustion engine with two rows of cylinders, each of which is assigned an exhaust gas catalytic converter with a lambda probe.
  • the OR gate 1 receives as input variables the information as to whether the coolant temperature T K is greater than 80 ° C and the further information as to whether the air temperature T S in the intake air collector of the internal combustion engine is greater than 20 ° C. In the case of an internal combustion engine that is at operating temperature and not exactly extremely wintry ambient temperatures, the OR gate 1 then emits an enable signal to a first AND gate 2. As a further input variable, this first AND gate 2 is supplied with the information as to whether the speed V FZG of the motor vehicle is less than 5 km / h.
  • the first AND gate 2 outputs a logic signal "1" to the second AND gate 3.
  • the second AND gate 3 receives a further logic signal "1" at its second input. This fulfills all of the requirements that the injection valves of one of the two cylinder rows can be switched off when the internal combustion engine is idling. This result is stored in the memory element 4 until any change. The memory element 4 passes this information on to the two subsequent AND elements 5 and 6.
  • the AND gate 5 receives the information about the voltage U L1 of the first lambda probe of the first exhaust gas catalytic converter at its second input
  • the AND gate 6 receives the information about the voltage U L2 of the second lambda probe of the second input second catalytic converter.
  • the logic diagram of Fig. 2 represents the operation of the invention. It is identical to the logic diagram of FIG. 1 in the first three logic elements 1, 2 and 3. Also in the embodiment of FIG. 2, the AND gate 3 sends a logical "1" signal to the AND gate 8 when the coolant temperature T K is greater than 80 ° C and / or the air temperature T S in the air collector of the internal combustion engine is greater Is 20 ° and in addition the vehicle speed V FZG is less than 5 km / h and finally the internal combustion engine is operated at idle, ie the idle contact is closed. At its second input, this AND gate 8 receives the information as to whether the electrical voltage U L of the lambda probe of the exhaust gas catalytic converter is greater or less than a limit voltage U G.
  • the injectors can be switched off sequentially depending on the engine ignition sequence according to a predetermined program when the internal combustion engine is idling.
  • the voltage of the lambda probe U L falls below the limit value U G , then this means that the exhaust gas catalytic converter has already cooled down to its minimum temperature required for the proper conversion, and consequently the sequential injection valve shutdown is canceled again at least for a predetermined period of time got to. Only when the exhaust gas catalytic converter has reached a sufficiently high operating temperature again, that is, when the electrical voltage U L of the lambda probe is again greater than the limit voltage U G , can the injection valves be switched off sequentially again. The sequential shutdown of the injection valves of the internal combustion engine is then carried out by the internal combustion engine control unit 9.
  • the diagram of FIG. 3 shows the relationship between the electrical voltage U L of the lambda probe as a function of the temperature T of the associated exhaust gas catalytic converter.
  • the electrical voltage U L of the lambda probe decreases with decreasing temperature T of the exhaust gas catalytic converter.
  • the limit temperature T G shown in the diagram of FIG. 3 represents the minimum temperature that the exhaust gas catalytic converter must have in order for it to function properly. In the diagram, this limit temperature T G corresponds to a limit voltage U G. If the exhaust gas catalytic converter of the internal combustion engine cools below the operating temperature T G due to an excessively long sequential shutdown of the injection valves, then the electrical voltage U L of the associated lambda probe drops below the limit value U G. Because of this relationship, the voltage U L of the lambda probe can be used as a measure of the temperature of the associated exhaust gas catalytic converter, so that a separate temperature sensor can be saved.
  • the internal combustion engine becomes a reduction while maintaining the exhaust gas quality fuel consumption and an improvement in thermal behavior the internal combustion engine reached.

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)
  • Exhaust Gas After Treatment (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (4)

  1. Dispositif de commande du ralenti d'un moteur à combustion de véhicule équipé d'un catalyseur de gaz d'échappement et d'une sonde lambda, ce dispositif comportant des moyens qui coupent les injecteurs pendant le fonctionnement en ralenti et neutralisent la coupure des injecteurs au moins pendant une durée prédéterminée si la température (T) du catalyseur de gaz d'échappement descend en-dessous d'une température limite (TG) prédéterminée,
    caractérisé en ce que
    les moyens de coupure des injecteurs assurent la coupe séquentiellement des injecteurs lorsque le moteur tourne au ralenti, suivant l'ordre d'allumage du moteur et selon un programme prédéterminé.
  2. Dispositif de commande du ralenti d'un moteur à combustion selon la revendication 1,
    caractérisé en ce que
    la coupure séquentielle des injecteurs pendant le fonctionnement au ralenti du moteur ne se fait que si la température du fluide de refroidissement (TK) du moteur est supérieure à 80° C/ou la température de l'air (TS) dans le collecteur d'admission est supérieure à 20° C.
  3. Dispositif de commande du ralenti d'un moteur à combustion selon l'une des revendications précédentes,
    caractérisé en ce que
    la coupure séquentielle des injecteurs est neutralisée pour une vitesse de déplacement du véhicule (VFZG) supérieure à 5 km/heure.
  4. Dispositif de commande du ralenti d'un moteur à combustion selon l'une des revendications précédentes,
    caractérisé en ce que
    la température (T) du catalyseur de gaz d'échappement se détermine par la mesure ou la surveillance de la tension électrique (UL) de la sonde lambda associée au catalyseur de gaz d'échappement correspondant.
EP94113276A 1993-10-11 1994-08-25 Dispositif pour régler la vitesse de valenti d'un moteur de véhicule Expired - Lifetime EP0647775B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4334557A DE4334557A1 (de) 1993-10-11 1993-10-11 Vorrichtung zur Leerlaufregelung einer Kraftfahrzeug-Brennkraftmaschine
DE4334557 1993-10-11

Publications (3)

Publication Number Publication Date
EP0647775A2 EP0647775A2 (fr) 1995-04-12
EP0647775A3 EP0647775A3 (fr) 1996-07-17
EP0647775B1 true EP0647775B1 (fr) 2003-04-09

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ID=6499846

Family Applications (1)

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EP94113276A Expired - Lifetime EP0647775B1 (fr) 1993-10-11 1994-08-25 Dispositif pour régler la vitesse de valenti d'un moteur de véhicule

Country Status (3)

Country Link
US (1) US5586432A (fr)
EP (1) EP0647775B1 (fr)
DE (2) DE4334557A1 (fr)

Families Citing this family (16)

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DE4423344A1 (de) * 1994-07-04 1996-01-11 Bayerische Motoren Werke Ag Verfahren zur Erkennung von seitenverkehrt angeschlossenen Lambda-Sonden
DE19503317A1 (de) 1995-02-02 1996-08-08 Bayerische Motoren Werke Ag Vorrichtung zur Abschaltsteuerung eines Einspritzventils bei Brennkraftmaschinen
US5801499A (en) * 1995-07-11 1998-09-01 Aisin Aw Co., Ltd. Control system for a vehicular drive unit
JP3622279B2 (ja) * 1995-07-31 2005-02-23 日産自動車株式会社 内燃機関の燃料供給制御装置
JP3252793B2 (ja) * 1998-05-15 2002-02-04 トヨタ自動車株式会社 内燃機関の排気浄化装置
FR2780100B1 (fr) * 1998-06-17 2001-01-26 Peugeot Procede pour accroitre rapidement la temperature dans un pot catalytique au demarrage d'un moteur a combustion interne pour vehicule automobile
DE19907851A1 (de) 1999-02-24 2000-08-31 Bayerische Motoren Werke Ag Verfahren zur Zylinderab- und -zuschaltung bei einer Kraftfahrzeug-Brennkraftmaschine
DE60003627T2 (de) * 2000-01-05 2004-06-09 Robert Bosch Gmbh Verfahren zur Regelung der Wärmeverluste eines katalytischen Konverters während Schubbetrieb
DE10003903B4 (de) 2000-01-29 2009-12-17 Volkswagen Ag Vorrichtung und Verfahren zur Steuerung eines Betriebes eines Mehrzylindermotors für Kraftfahrzeuge mit einer mehrflutigen Abgasreinigungsanlage
DE10161850B4 (de) * 2001-12-15 2010-03-04 Daimler Ag Verfahren zum Betrieb einer Brennkraftmaschine eines Kraftfahrzeuges
JP3963105B2 (ja) * 2002-01-18 2007-08-22 日産自動車株式会社 内燃機関の制御装置
JP4725653B2 (ja) * 2009-01-30 2011-07-13 トヨタ自動車株式会社 多気筒内燃機関の運転制御装置
US8214095B2 (en) * 2009-05-27 2012-07-03 GM Global Technology Operations LLC Method and apparatus for detecting engine firing in a hybrid powertrain system
US8689541B2 (en) 2011-02-16 2014-04-08 GM Global Technology Operations LLC Valvetrain control method and apparatus for conserving combustion heat
KR20170024853A (ko) * 2015-08-26 2017-03-08 현대자동차주식회사 엔진 제어 방법 및 엔진 제어 시스템
JP2017155699A (ja) * 2016-03-03 2017-09-07 株式会社クボタ 多目的車両

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Also Published As

Publication number Publication date
EP0647775A2 (fr) 1995-04-12
EP0647775A3 (fr) 1996-07-17
DE59410268D1 (de) 2003-05-15
US5586432A (en) 1996-12-24
DE4334557A1 (de) 1995-04-13

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