EP0647775A2 - 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
EP0647775A2
EP0647775A2 EP94113276A EP94113276A EP0647775A2 EP 0647775 A2 EP0647775 A2 EP 0647775A2 EP 94113276 A EP94113276 A EP 94113276A EP 94113276 A EP94113276 A EP 94113276A EP 0647775 A2 EP0647775 A2 EP 0647775A2
Authority
EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
exhaust gas
cylinders
catalytic converter
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
EP94113276A
Other languages
German (de)
English (en)
Other versions
EP0647775B1 (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
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 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
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
    • F02D41/1439—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 patent claim 1 or 2.
  • the internal combustion engine is operated in idle mode by firing all cylinders when the motor vehicle is stationary, this can lead to critical thermal behavior, in particular in the case of large-volume, multi-cylinder internal combustion engines, if the combustion generated amount of heat can not be dissipated by the coolant in the absence of wind.
  • This object is achieved according to a first alternative of the invention in 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, in that the idle valves of one of the two rows of cylinders are alternately switched off when the internal combustion engine is idling and that the injection valve shutdown is switched from one row of cylinders to the other row of cylinders when the temperature of the exhaust gas catalytic converter assigned to the currently deactivated row of cylinders falls below a predetermined limit temperature.
  • This first alternative of the invention is particularly suitable for 8- or 12-cylinder internal combustion engines with a V-shaped cylinder arrangement, which according to their firing order consist of two 4-cylinder or two 6-cylinder internal combustion engines. Particularly in the case of a 12-cylinder internal combustion engine constructed in this way, there is no appreciable deterioration in the idling quality because of the complete mass balance of a cylinder bank.
  • the object on which the invention is based becomes in a device for idle control of a motor vehicle internal combustion engine solved with exhaust gas catalytic converter and lambda probe in that, when the internal combustion engine is idling, the injection valves are switched off sequentially depending on the internal combustion engine ignition sequence according to a predetermined program and that the sequential injection valve shutdown is canceled at least for a predetermined period of time when the temperature of the exhaust gas catalyst falls below a predetermined limit temperature.
  • This embodiment of the invention is already suitable for 6-cylinder internal combustion engines.
  • Each of the two alternatives of the invention ensures that the exhaust gas catalytic converter (s) cannot cool below the temperature required for proper exhaust gas conversion. This results in an improved exhaust gas emission behavior of the internal combustion engine. Furthermore, switching off individual cylinders when the internal combustion engine is idling can reduce their fuel consumption by approximately 35% when idling. Finally, the thermal behavior can be significantly improved by the invention, in particular in large-volume internal combustion engines in idle mode when the cooling effect of the airstream is missing.
  • the sequential shutdown of the injection valves or the alternate shutdown of the injection valves of a cylinder bank in idle operation of the internal combustion engine only takes place when 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 is. This ensures that the single cylinder shutdown when the internal combustion engine is idling only when it is warmer Internal combustion engine and / or when the outside temperature is sufficiently warm.
  • the sequential shutdown of the injectors or the alternate shutdown of the injectors of a row of cylinders only occurs at a vehicle speed greater than 5, so that no unpleasant torque jump occurs at the output of the internal combustion engine when parking or slow rolling of the motor vehicle by switching on the non-fired cylinders km / h canceled.
  • the temperature of the or one of the exhaust gas catalysts is determined by measuring or monitoring the electrical voltage of the lambda probe assigned to the relevant exhaust gas catalyst.
  • the logic diagram of FIG. 1 shows the functioning of a first exemplary embodiment of the invention.
  • the device according to this first exemplary embodiment of the invention is suitable for idling control of a motor vehicle internal combustion engine with two rows of cylinders, each of which is associated with 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 manifold 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.
  • 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. In the event that 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. When the open contact is closed, the second AND gate 3 receives a further logic signal "1" at its second input. This fulfills all the requirements that the injectors of one of the two rows of cylinders 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 at its second input of the second catalytic converter.
  • the first catalytic converter falls below a limit value U G , then this means that the cylinder row assigned to this first exhaust gas catalytic converter must be switched on again and thus the previously fired cylinder row which is assigned to the second exhaust gas catalytic converter can be switched off.
  • the logic diagram of FIG. 2 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 emits 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 20 ° C 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, depending on the engine ignition sequence, in an idle mode of the engine predetermined program can be switched off sequentially.
  • 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 catalytic converter has reached a sufficiently high operating temperature again, ie 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 sensor 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.
  • the electrical voltage U L drops of the associated lambda Probe below the limit 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 be so that a separate temperature sensor can be saved.

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)
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
DE4334557 1993-10-11
DE4334557A DE4334557A1 (de) 1993-10-11 1993-10-11 Vorrichtung zur Leerlaufregelung einer Kraftfahrzeug-Brennkraftmaschine

Publications (3)

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

Family

ID=6499846

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273840B1 (en) 1999-02-24 2001-08-14 Bayerische Motoren Werke Aktiengesellschaft Method for shutting down and switching on motor vehicle internal-combustion engine cylinders

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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
EP1126148B1 (fr) * 2000-01-05 2003-07-02 Robert Bosch Gmbh Procédé de contrôle de perte de chaleur d'un convertisseur catalytique pendant décélération
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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Publication number Priority date Publication date Assignee Title
US6273840B1 (en) 1999-02-24 2001-08-14 Bayerische Motoren Werke Aktiengesellschaft Method for shutting down and switching on motor vehicle internal-combustion engine cylinders

Also Published As

Publication number Publication date
US5586432A (en) 1996-12-24
DE4334557A1 (de) 1995-04-13
EP0647775B1 (fr) 2003-04-09
DE59410268D1 (de) 2003-05-15
EP0647775A3 (fr) 1996-07-17

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