WO2011039026A2 - Method for controlling the stopping of an automatically stopping internal combustion engine - Google Patents

Method for controlling the stopping of an automatically stopping internal combustion engine Download PDF

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Publication number
WO2011039026A2
WO2011039026A2 PCT/EP2010/062813 EP2010062813W WO2011039026A2 WO 2011039026 A2 WO2011039026 A2 WO 2011039026A2 EP 2010062813 W EP2010062813 W EP 2010062813W WO 2011039026 A2 WO2011039026 A2 WO 2011039026A2
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WO
WIPO (PCT)
Prior art keywords
internal combustion
combustion engine
stopping
triggered
initiated
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PCT/EP2010/062813
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German (de)
French (fr)
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WO2011039026A3 (en
Inventor
Norbert Frisch
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Bayerische Motoren Werke Aktiengesellschaft
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Publication of WO2011039026A2 publication Critical patent/WO2011039026A2/en
Publication of WO2011039026A3 publication Critical patent/WO2011039026A3/en

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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
    • F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
    • F02N11/0844—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop with means for restarting the engine directly after an engine stop request, e.g. caused by change of driver mind
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/005—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
    • F02N2019/008—Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation the engine being stopped in a particular position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/1502—Digital data processing using one central computing unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for outflow control of an automatically disconnectable internal combustion engine according to the preamble of claim 1.
  • the internal combustion engine is manually switched on or started by the driver of the vehicle.
  • a key provided for this purpose is plugged into a corresponding lock and this is rotated to start the internal combustion engine or actuated an existing push button to activate the internal combustion engine.
  • appropriate measures for starting the internal combustion engine are initiated by a control unit. Such starting of the internal combustion engine is referred to as normal start or key start.
  • start-stop systems In order to reduce fuel consumption and pollutant emissions, methods and systems (so-called start-stop systems or start-stop functions) are currently being developed and partly already in use, which the drive unit of the motor vehicle under certain conditions or Automatically switch off in the presence of defined switch-off conditions, and automatically switch on again if defined switch-on conditions exist.
  • Such methods and systems are particularly suitable for city traffic to reduce fuel consumption and also to reduce emissions, and in particular to reduce C0 2 - emissions, since in city traffic, the vehicle often stops at traffic lights or due to traffic and the operation of the internal combustion engine is not required.
  • the speed of the vehicle must be below a predetermined threshold, an idle switch must be on, and a gearshift position of the transmission must be in neutral.
  • pinion starters comprise at least one so-called engagement relay, which attracts the relay armature when it is started due to a magnetic field built up in the relay coil, as a result of which the pinion is pushed forward against the toothed ring via the engagement lever.
  • the object of the invention is now to provide a simple and inexpensive method for quickly reaching the engine standstill, so that a fast automatic start of an automatically disconnected drive unit in the so-called. Change-of-mind case can be made possible.
  • the invention is based on a conventional method for controlling an automatic shutdown and connection operation of an internal combustion engine in a motor vehicle by means of a start-stop control unit, by which the drive unit is automatically switched off when stopping the motor vehicle, if predetermined shutdown conditions are met, and by which the automatically switched off drive unit automatically is turned on when at least one driver-side or system-side Einschaltaufgins takes place.
  • a driver's power-on request is a measure by the driver that signals the driver to continue driving. This may be vehicles with manual transmission, for example, to a clutch actuation to engage a gear.
  • a system-side Einschaltauffor- tion takes place, for example, if no sufficient air conditioning of the vehicle can be guaranteed or if the state of charge of the battery has fallen below a predetermined threshold and further discharge there is a risk that no more start can be initiated.
  • the basic idea of the invention is that with an automatically switched-off drive unit in the so-called change-mind case, a quick start or rapid achievement of the idling speed at the start of the automatically switched-off internal combustion engine is possible when the stoppage of the internal combustion engine is reached as quickly as possible.
  • Speeding engine stop specifically. At least one deliberately metered combustion in the cylinder of the internal combustion engine is intended to generate a torque counter to the direction of rotation of the outgoing engine so that the inertia of the rotating system can be absorbed and a fast engine standstill can be achieved.
  • the control unit (as mentioned above) actuate the internal combustion engine in such a way that at least a cylinder at least one combustion during the compression stroke is triggered, so that a faster standstill of the internal combustion engine is achieved.
  • a torque is generated by the triggered combustion, which acts counter to the current direction of rotation of the internal combustion engine, ie by the generated torque the inertia of the rotating system is intercepted, so that at least a faster standstill is achieved.
  • the counter-torque generated thereby leads to an immediate standstill of the internal combustion engine, ie, the generated counter-torque corresponds in magnitude to the current torque.
  • the method can also be used in diesel internal combustion engines, wherein the combustion is triggered by an early injection (before reaching top dead center) and possibly with ignition assistance (spark plug, glow plug).
  • the method according to the invention makes it possible to achieve a substantial improvement in the system response time in the so-called change-of-mind case with regard to an automatic start. Since it is only a software adaptation, there are no additional costs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The invention relates to a method for controlling the stopping of an automatically stopping internal combustion engine in a motor vehicle by means of a control unit, by which means an automatic stopping process is initiated when pre-determined stopping conditions are met, and an automatic starting process is initiated when at least one starting request is carried out. The invention is characterised in that the control unit controls the internal combustion engine, in the framework of the automatic stopping process, in such a way that at least one combustion is triggered in at least one cylinder, during the compression stroke, such that the internal combustion engine can be stopped more rapidly.

Description

Verfahren zur Auslaufsteuerung einer automatisch abschaltbaren Brennkraftmaschine  Method for discharge control of an automatically disconnectable internal combustion engine
Die Erfindung bezieht sich auf ein Verfahren zur Auslaufsteuerung einer automatisch abschaltbaren Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1 . The invention relates to a method for outflow control of an automatically disconnectable internal combustion engine according to the preamble of claim 1.
In der Regel wird die Brennkraftmaschine manuell vom Fahrer des Fahrzeugs eingeschaltet bzw. gestartet. Dazu wird ein dafür vorgesehener Schlüssel in ein entsprechendes Schloss gesteckt und dieser zum Starten der Brennkraftmaschine gedreht oder ein vorhandener Druckknopf zum Aktivieren der Brennkraftmaschine betätigt. Daraufhin werden durch eine Steuereinheit entsprechende Maßnahmen zum Starten der Brennkraftmaschine eingeleitet. Ein derartiges Starten der Brennkraftmaschine wird als Normalstart oder Schlüsselstart bezeichnet. In general, the internal combustion engine is manually switched on or started by the driver of the vehicle. For this purpose, a key provided for this purpose is plugged into a corresponding lock and this is rotated to start the internal combustion engine or actuated an existing push button to activate the internal combustion engine. Then, appropriate measures for starting the internal combustion engine are initiated by a control unit. Such starting of the internal combustion engine is referred to as normal start or key start.
Um Kraftstoffverbrauch und Schadstoffemissionen zu reduzieren, werden derzeit Verfahren und Systeme (sog. Start-Stopp-Systeme bzw. Start-Stopp- Funktionen) entwickelt und zum Teil auch bereits eingesetzt, welche die Antriebseinheit des Kraftfahrzeugs unter bestimmten Voraussetzungen bzw. bei Vorliegen definierter Abschaltbedingungen automatisch abschalten, und bei Vorliegen definierter Einschaltbedingungen automatisch wieder einschalten. Derartige Verfahren und Systeme sind vor allem für den Stadtverkehr zur Reduzierung des Kraftstoffverbrauchs und gleichermaßen auch zur Reduzierung von Emissionen, vor allem auch zur Reduzierung von C02- Emissionen geeignet, da im Stadtverkehr das Fahrzeug oft an Ampeln oder aufgrund des Verkehrs zum Stehen kommt und der Betrieb der Brennkraftmaschine nicht erforderlich ist. In order to reduce fuel consumption and pollutant emissions, methods and systems (so-called start-stop systems or start-stop functions) are currently being developed and partly already in use, which the drive unit of the motor vehicle under certain conditions or Automatically switch off in the presence of defined switch-off conditions, and automatically switch on again if defined switch-on conditions exist. Such methods and systems are particularly suitable for city traffic to reduce fuel consumption and also to reduce emissions, and in particular to reduce C0 2 - emissions, since in city traffic, the vehicle often stops at traffic lights or due to traffic and the operation of the internal combustion engine is not required.
So ist aus der DE 101 61 343 A1 eine automatische Stopp- und Anlasssteuervorrichtung für einen Verbrennungsmotor bekannt, wobei die Steuervorrichtung entsprechende Maßnahmen zum Abschalten des Verbrennungsmotors vornimmt, wenn alle genannten Abschaltbedingungen erfüllt sind. Thus, from DE 101 61 343 A1 an automatic stop and start control device for an internal combustion engine is known, wherein the control device undertakes appropriate measures for switching off the internal combustion engine when all said shutdown conditions are met.
Beispielsweise muss die Geschwindigkeit des Fahrzeugs unter einem vorgegebenen Grenzwert liegen, ein Leerlaufschalter muss eingeschaltet sein und eine Gangschaltstellung des Getriebes muss in Neutralstellung sein. For example, the speed of the vehicle must be below a predetermined threshold, an idle switch must be on, and a gearshift position of the transmission must be in neutral.
Sobald in einem Fahrzeug bei automatisch abgeschalteter Antriebseinheit ein Start der Brennkraftmaschine angefordert wird - entweder manuell durch den Fahrer oder automatisch aufgrund vorgegebener Einschaltbedingungen - werden entsprechende Maßnahmen zum Einschalten der Brennkraftmaschine vorgenommen. Üblicherweise wird der Motorstart mit einem kostengünstigen Ritzelstarter durchgeführt. Bekannte Ritzelstarter umfassen zumindest ein sog. Einrückrelais, welches bei Startaufforderung aufgrund eines in der Relaisspule aufgebauten Magnetfeldes den Relaisanker anzieht, wodurch das Ritzel über den Einrückhebel nach vorne gegen den Zahnkranz geschoben wird. Gleichzeitig schließt der Relaisanker des Einrückrelais über eine Kontaktbrücke den Hauptstromkreis des Startermotors zwischen Batterie und Startermotor, so dass sich der als Elektromotor ausgebildete Startermotor in Bewegung setzen (drehen) und die mit ihm mittels Ritzel verbundene Antriebswelle zum Drehen bringen kann. Ein Problem beim Einsatz eines Ritzelstarters in einem mit einer Start-Stopp- Funktion ausgestatteten Kraftfahrzeug besteht darin, dass der Start der Antriebseinheit aus Verschleißgründen nur bei stehenden Verbrennungsmotoren eingeleitet werden kann bzw. eingeleitet werden sollte. Im sog. Change-Of- Mind-Fall (d .h. die Antriebseinheit wird gerade abgestellt, der Fahrer möchte aber im gleichen Moment wieder losfahren) kommt es zu langen Wiederstartzeiten, da der Motor erst vollständig auslaufen muss (Drehzahl = 0). As soon as a start of the internal combustion engine is requested in a vehicle when the drive unit is automatically switched off-either manually by the driver or automatically on the basis of predetermined switch-on conditions-appropriate measures are taken to switch on the internal combustion engine. Usually, the engine start is performed with a low-cost pinion starter. Known pinion starters comprise at least one so-called engagement relay, which attracts the relay armature when it is started due to a magnetic field built up in the relay coil, as a result of which the pinion is pushed forward against the toothed ring via the engagement lever. At the same time the relay armature of the contactor via a contact bridge closes the main circuit of the starter motor between the battery and starter motor, so that set as an electric motor starter motor set in motion (rotate) and can bring him connected by means of pinion drive shaft to rotate. A problem with the use of a pinion starter in a motor vehicle equipped with a start-stop function is that the start of the drive unit can only be initiated or initiated for wear reasons for stationary internal combustion engines. In the so-called change-of-mind case (ie the drive unit is being switched off, but the driver would like to start again at the same moment), long restart times occur, since the engine must first coast completely (speed = 0).
Aus der DE 10 2006 028 334 A1 ist ein Verfahren zur Steuerung einer Motorabschaltung bekannt, wobei beim Abschalten des Motors an einen mit dem Motor verbundenen Stromgenerator eine Widerstandslast angelegt wird, um dadurch eine Bremskraft auf den Motor auszuüben und die Zeit zu verringern, die erforderlich ist, um den Motor in einen abgestellten Zustand zu bringen. Zur Durchführung dieses Verfahrens ist ein entsprechender Schalter notwendig, der Mehrkosten verursacht. From DE 10 2006 028 334 A1 a method for controlling an engine shutdown is known, wherein when the engine is switched off to a power generator connected to the motor, a resistive load is applied, thereby exerting a braking force on the engine and reducing the time required is to put the engine in a parked state. To perform this method, a corresponding switch is necessary, which causes additional costs.
Aufgabe der Erfindung ist nun, ein einfaches und kostengünstiges Verfahren zum schnellen Erreichen des Motorstillstands bereitzustellen, so dass ein schneller automatischer Start einer automatisch abgeschalteten Antriebseinheit im sog. Change-Of-Mind-Fall ermöglicht werden kann. The object of the invention is now to provide a simple and inexpensive method for quickly reaching the engine standstill, so that a fast automatic start of an automatically disconnected drive unit in the so-called. Change-of-mind case can be made possible.
Diese Aufgabe wird durch ein Verfahren nach Patentanspruch 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen. This object is achieved by a method according to claim 1. Advantageous developments emerge from the dependent claims.
Die Erfindung geht von einem herkömmlichen Verfahren zur Steuerung eines automatischen Abschalt- und Anschaltvorgangs einer Brennkraftmaschine in einem Kraftfahrzeug mittels einer Start-Stopp-Steuereinheit aus, durch welche beim Anhalten des Kraftfahrzeugs die Antriebseinheit automatisch abgeschaltet wird, wenn vorgegebene Abschaltbedingungen erfüllt sind, und durch welche die automatisch abgeschaltete Antriebseinheit automatisch angeschaltet wird, wenn zumindest eine fahrerseitige oder systemseitige Einschaltaufforderung erfolgt. Bei einer fahrerseitigen Einschaltaufforderung handelt es sich um eine Maßnahme des Fahrers, durch die der Fahrer zum Ausdruck bringt, dass er wieder weiterfahren möchte. Hierbei kann es sich bei Fahrzeugen mit Handschaltgetriebe bspw. um eine Kupplungsbetätigung zum Einlegen eines Gangs handeln. Eine systemseitige Einschaltaufforde- rung erfolgt bspw. dann, wenn keine ausreichende Klimatisierung des Fahrzeugs gewährleistet werden kann bzw. wenn der Ladezustand der Batterie eine vorgegebene Schwelle unterschritten hat und bei weiterer Entladung die Gefahr besteht, dass kein Start mehr eingeleitet werden kann. The invention is based on a conventional method for controlling an automatic shutdown and connection operation of an internal combustion engine in a motor vehicle by means of a start-stop control unit, by which the drive unit is automatically switched off when stopping the motor vehicle, if predetermined shutdown conditions are met, and by which the automatically switched off drive unit automatically is turned on when at least one driver-side or system-side Einschaltaufforderung takes place. A driver's power-on request is a measure by the driver that signals the driver to continue driving. This may be vehicles with manual transmission, for example, to a clutch actuation to engage a gear. A system-side Einschaltauffor- tion takes place, for example, if no sufficient air conditioning of the vehicle can be guaranteed or if the state of charge of the battery has fallen below a predetermined threshold and further discharge there is a risk that no more start can be initiated.
Grundgedanke der Erfindung ist, dass bei einer automatisch abgeschalteten Antriebseinheit im sog. Change-Mind-Fall ein schneller Start bzw. ein schnelles Erreichen der Leerlaufdrehzahl beim Start der automatisch abgeschalteten Brennkraftmaschine dann möglich ist, wenn der Stillstand der Brennkraftmaschine möglichst schnell erreicht wird. Die Idee ist nun, den The basic idea of the invention is that with an automatically switched-off drive unit in the so-called change-mind case, a quick start or rapid achievement of the idling speed at the start of the automatically switched-off internal combustion engine is possible when the stoppage of the internal combustion engine is reached as quickly as possible. The idea is now, the
Motorstopp gezielt zu beschleunigen. Dabei soll durch zumindest eine be- wussi dosierte Verbrennung im Zylinder der Brennkraftmaschine ein Drehmoment entgegen der Drehrichtung des auslaufenden Motors erzeugt werden, so dass die Massenträgheit des drehenden Systems abgefangen werden kann und ein schneller Motorstillstand erreicht wird. Speeding engine stop specifically. At least one deliberately metered combustion in the cylinder of the internal combustion engine is intended to generate a torque counter to the direction of rotation of the outgoing engine so that the inertia of the rotating system can be absorbed and a fast engine standstill can be achieved.
Um zu verhindern, dass der Fahrer im Change-Mind-Fall (zu) lange auf den Start der Antriebseinheit warten muss, wird nun erfindungsgemäß vorgeschlagen, dass die (oben genannte) Steuereinheit im Rahmen des automatischen Abschaltvorgangs die Brennkraftmaschine derart ansteuert, dass in zumindest einem Zylinder zumindest eine Verbrennung während des Verdichtungstaktes ausgelöst wird, so dass ein schnellerer Stillstand der Brennkraftmaschine erreicht wird. Vorteilhafterweise wird durch die ausgelöste Verbrennung ein Drehmoment erzeugt, das entgegen der aktuellen Drehrichtung der Brennkraftmaschine wirkt, d. h. durch das erzeugte Drehmoment wird die Massenträgheit des drehenden Systems abgefangen, so dass zumindest ein schnellerer Stillstand erreicht wird. Idealerweise wird eine derartige Verbrennung ausgelöst, dass das dadurch erzeugte Gegen-Drehmoment zu einem unmittelbaren Stillstand der Brennkraftmaschine führt, d. h. das erzeugte Gegen-Drehmoment entspricht betragsmäßig in etwa dem aktuell vorliegendem Drehmoment. In order to prevent the driver from having to wait too long for the start of the drive unit in the change-mind case, it is now proposed according to the invention that the control unit (as mentioned above) actuate the internal combustion engine in such a way that at least a cylinder at least one combustion during the compression stroke is triggered, so that a faster standstill of the internal combustion engine is achieved. Advantageously, a torque is generated by the triggered combustion, which acts counter to the current direction of rotation of the internal combustion engine, ie by the generated torque the inertia of the rotating system is intercepted, so that at least a faster standstill is achieved. Ideally, such a combustion is triggered that the counter-torque generated thereby leads to an immediate standstill of the internal combustion engine, ie, the generated counter-torque corresponds in magnitude to the current torque.
Prinzipiell eignet sich das hier angegebene Verfahren zum Erreichen eines schnellen Motorstillstands für alle Arten von Brennkraftmaschinen, insbesondere jedoch für Otto-Brennkraftmaschinen mit der freien Wahl des Zündzeitpunktes, da hier die Verbrennung durch Zündung des Verbrennungsgemisches zu jedem beliebigen Zeitpunkt auslösbar ist. Zum Erzeugen eines Gegen-Drehmoments sollte die Verbrennung hier zu einem vorgegebenen Zeitpunkt vorgenommen werden, der weit über die übliche Frühzündung hinaus geht. In principle, the method specified here for achieving a fast engine standstill for all types of internal combustion engines, but especially for gasoline internal combustion engines with the free choice of the ignition timing, since the combustion by ignition of the combustion mixture at any point in time is triggered. To generate a counter-torque, the combustion should be made here at a given time, which goes well beyond the usual pre-ignition.
Das Verfahren kann jedoch auch bei Diesel-Brennkraftmaschinen eingesetzt werden, wobei die Verbrennung dabei durch eine frühe Einspritzung (vor Erreichen des oberen Totpunktes) und ggf. mit Zündunterstützung (Zündkerze, Glühkerze) ausgelöst wird. However, the method can also be used in diesel internal combustion engines, wherein the combustion is triggered by an early injection (before reaching top dead center) and possibly with ignition assistance (spark plug, glow plug).
Durch das erfindungsgemäße Verfahren kann trotz Einsatzes eines kostengünstigen Ritzelstarters eine wesentliche Verbesserung der System- Reaktionszeit im sog. Change-Of-Mind-Fall hinsichtlich eines automatischen Starts erreicht werden. Da es sich lediglich um eine Softwareanpassung handelt, entstehen keine Zusatzkosten. Despite the use of a cost-effective pinion starter, the method according to the invention makes it possible to achieve a substantial improvement in the system response time in the so-called change-of-mind case with regard to an automatic start. Since it is only a software adaptation, there are no additional costs.

Claims

Patentansprüche claims
Verfahren zur Auslaufsteuerung einer automatisch abschaltbaren Brennkraftmaschine in einem Kraftfahrzeug mittels einer Steuereinheit, durch welche ein automatischer Abschaltvorgang eingeleitet wird, wenn vorgegebene Abschaltbedingungen erfüllt sind, und durch welche ein automatischer Anschaltvorgang eingeleitet wird, wenn zumindest eine Einschaltaufforderung erfolgt, dadurch gekennzeichnet, dass die Steuereinheit im Rahmen des automatischen Abschaltvorgangs die Brennkraftmaschine derart ansteuert, dass in zumindest einem Zylinder zumindest eine Verbrennung während des Verdichtungstaktes ausgelöst wird, so dass ein schnellerer Stillstand der Brennkraftmaschine erreicht wird. A method for stopping control of an automatically disconnectable internal combustion engine in a motor vehicle by means of a control unit, which an automatic shutdown is initiated when predetermined shutdown conditions are met, and by which an automatic power-up is initiated when at least one Einschaltaufforderung takes place, characterized in that the control unit Within the scope of the automatic switch-off process, the internal combustion engine controls such that at least one combustion is triggered in at least one cylinder during the compression stroke, so that a faster standstill of the internal combustion engine is achieved.
Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass eine derartige Verbrennung ausgelöst wird, dass ein Drehmoment erzeugt wird, das entgegen der aktuellen Drehrichtung wirkt, insbesondere derart, dass durch das erzeugte Drehmoment ein unmittelbarer Stillstand der Brennkraftmaschine erreicht wird. A method according to claim 1, characterized in that such a combustion is triggered, that a torque is generated which acts counter to the current direction of rotation, in particular such that an instant standstill of the internal combustion engine is achieved by the generated torque.
Verfahren nach einem der vorangegangenen Ansprüche für eine Otto-Brennkraftmaschine, dadurch gekennzeichnet, dass die Verbrennung durch Einspritzung und Zünden des Verbrennungsgemisches zu einem vorgegebenen Zeitpunkt ausgelöst wird. Method according to one of the preceding claims for an Otto internal combustion engine, characterized in that the combustion is triggered by injection and ignition of the combustion mixture at a predetermined time.
4. Verfahren nach Anspruch 1 oder 2 für eine Diesel- Brennkraftmaschine, dadurch gekennzeichnet, dass die Verbrennung durch eine frühe Einspritzung und vorteilhafterweise durch Zünden mittels einer Zündhilfe zu einem vorgegebenen Zeitpunkt ausgelöst wird. 4. The method of claim 1 or 2 for a diesel internal combustion engine, characterized in that the combustion is triggered by an early injection and advantageously by ignition by means of a starting aid at a predetermined time.
PCT/EP2010/062813 2009-10-01 2010-09-01 Method for controlling the stopping of an automatically stopping internal combustion engine WO2011039026A2 (en)

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Application Number Priority Date Filing Date Title
DE102009047981A DE102009047981A1 (en) 2009-10-01 2009-10-01 Method for discharge control of an automatically disconnectable internal combustion engine
DE102009047981.3 2009-10-01

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WO2011039026A2 true WO2011039026A2 (en) 2011-04-07
WO2011039026A3 WO2011039026A3 (en) 2011-07-28

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DE102009047981A1 (en) 2011-04-07

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