DE102010020066A1 - Method for operating automatic start-stop system for motor vehicle, involves engaging gear stage automatically during fulfillment of pre-determined switching-off condition for internal combustion engine - Google Patents
Method for operating automatic start-stop system for motor vehicle, involves engaging gear stage automatically during fulfillment of pre-determined switching-off condition for internal combustion engine Download PDFInfo
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- DE102010020066A1 DE102010020066A1 DE102010020066A DE102010020066A DE102010020066A1 DE 102010020066 A1 DE102010020066 A1 DE 102010020066A1 DE 102010020066 A DE102010020066 A DE 102010020066A DE 102010020066 A DE102010020066 A DE 102010020066A DE 102010020066 A1 DE102010020066 A1 DE 102010020066A1
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- internal combustion
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
- B60W10/115—Stepped gearings with planetary gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18018—Start-stop drive, e.g. in a traffic jam
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
- B60W2030/206—Reducing vibrations in the driveline related or induced by the engine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0616—Position of fuel or air injector
- B60W2710/0633—Inlet air flow rate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/10—Change speed gearings
- B60W2710/1005—Transmission ratio engaged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
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- 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
- F02D41/0002—Controlling intake air
- F02D2041/001—Controlling intake air for engines with variable valve actuation
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2312/00—Driving activities
- F16H2312/14—Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/0021—Generation or control of line pressure
- F16H61/0025—Supply of control fluid; Pumps therefore
Abstract
Description
Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Betrieb eines automatischen Start-Stopp-Systems, auf ein Start-Stopp-System für ein Kraftfahrzeug, sowie auf ein Kraftfahrzeug, welches mit einem entsprechenden Start-Stopp-System ausgestattet ist.The present invention relates to a method for operating an automatic start-stop system, to a start-stop system for a motor vehicle, as well as to a motor vehicle, which is equipped with a corresponding start-stop system.
Aufgrund stetig steigender Energie- und Treibstoffkosten sowie zunehmend schärferer Umweltauflagen kommt einem möglichst verbrauchsoptimalen Betrieb eines Kraftfahrzeuges eine zunehmende Bedeutung zu.Due to steadily rising energy and fuel costs as well as increasingly stringent environmental regulations, a consumption-optimized operation of a motor vehicle is becoming increasingly important.
Zur Reduzierung des Kraftstoffverbrauchs von Kraftfahrzeugen ist es bekannt, den Verbrennungsmotor, welcher als Antriebsaggregat des Kraftfahrzeuges dient, in bestimmten Betriebssituationen abzuschalten. So kommen in modernen Kraftfahrzeugen sogenannte Start-Stopp-Systeme zum Einsatz. Dabei schaltet der Verbrennungsmotor bei Erfüllung vorgegebener Abschaltbedingungen, wie zum Beispiel bei Stillstand des Kraftfahrzeuges bei einem Halt an einer Ampel, selbsttätig aus. Sobald eine Wiederstartbedingung, wie zum Beispiel eine Betätigung des Fahrpedals, erfüllt ist, startet der Verbrennungsmotor wieder automatisch. Dabei ist es wünschenswert, dass Start und Weiterfahrt mit derselben Dynamik erfolgen wie bei einem Kraftfahrzeug ohne Start-Stopp-Funktion. Außerdem ist zu gewährleisten, dass es zu keinen Einbußen im Fahrkomfort, zum Beispiel durch einen Startruck beim Wiederstart, kommt.To reduce the fuel consumption of motor vehicles, it is known to turn off the internal combustion engine, which serves as a drive unit of the motor vehicle, in certain operating situations. So in modern motor vehicles so-called start-stop systems are used. In this case, the internal combustion engine automatically turns off when predetermined shutdown conditions, such as at standstill of the motor vehicle at a stop at a traffic light. Once a restart condition, such as an operation of the accelerator pedal is met, the engine starts again automatically. It is desirable that start and continue driving done with the same dynamics as in a motor vehicle without start-stop function. In addition, it must be ensured that there is no loss in ride comfort, for example, by a starter truck when restarting.
Bei Kraftfahrzeugen mit Automatikgetriebe, bei welchem der Triebstrang systembedingt auch im Stillstand geschlossen ist, ergibt sich dabei die Problematik, dass bei abgestelltem Verbrennungsmotor die Getriebehydraulik nicht mit Druck versorgt wird, so dass die zur verzögerungsfreien Weiterfahrt notwendigen Schaltelemente, wie Kupplungen und Bremsen, im Getriebe nicht betätigt werden können.In motor vehicles with automatic transmission, in which the drive train system is closed even at a standstill, this results in the problem that when the engine is switched off, the transmission hydraulics is not supplied with pressure, so that necessary for delay-free driving further switching elements, such as clutches and brakes in the transmission can not be operated.
Um dieses Problem zum umgehen, ist es bekannt, die Ölpumpe unabhängig vom Verbrennungsmotor durch einen Elektromotor anzutreiben. Dies führt jedoch zu einem nicht unbeträchtlichen Energiemehraufwand und ist darüber hinaus mit erheblichen Zusatzkosten verbunden.To circumvent this problem, it is known to drive the oil pump independently of the engine by an electric motor. However, this leads to a not inconsiderable energy expenditure and is also associated with significant additional costs.
Ein anderer Lösungsansatz bedient sich eines Energiespeichers in Form eines sogenannten Impulsspeichers. Der Impulsspeicher ist dabei als Federkolbenspeicher ausgeführt, welcher sich während des Fahrbetriebs mit Öl füllt und eine Feder spannt. Diese presst die gespeicherte Ölmenge beim erneuten Start des Verbrennungsmotors in das Getriebe zurück, um die zum Anfahren notwendigen Schaltelemente im Getriebe mit Öl zu versorgen. Auch dieser Ansatz ist jedoch mit einem erheblichen finanziellen und konstruktiven Mehraufwand verbunden.Another approach uses an energy storage in the form of a so-called pulse memory. The pulse accumulator is designed as a spring piston accumulator, which fills with oil during driving and biases a spring. This presses the stored amount of oil when re-starting the engine in the transmission back to supply the necessary for starting switching elements in the transmission with oil. However, this approach is also associated with a significant financial and constructive overhead.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Start-Stopp-System sowie ein Verfahren zum Betrieb eines Start-Stopp-System für ein Kraftfahrzeug mit einem Verbrennungsmotor und einem Automatikgetriebe anzugeben, bei welchen ohne den Einsatz zusätzlicher Komponenten ein ruckfreier Wiederstart des Verbrennungsmotors ermöglicht und die gewünschte Dynamik bei Start und Weiterfahrt des Kraftfahrzeuges sicher gestellt wird.The present invention has for its object to provide a start-stop system and a method for operating a start-stop system for a motor vehicle with an internal combustion engine and an automatic transmission, in which without the use of additional components a jerk-free restart of the engine allows and the desired dynamics at start and onward travel of the motor vehicle is ensured.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren zum Betrieb eines automatischen Start-Stopp-Systems mit den Merkmalen gemäß Patentanspruch 1 gelöst.This object is achieved by a method for operating an automatic start-stop system having the features according to claim 1.
Dem erfindungsgemäßen Verfahren liegt dabei die Idee zugrunde, dass ein Automatikgetriebe zumindest eine Gangstufe, häufig die zweite Gangstufe, aufweist, aus welcher, z. B. durch bloßes Öffnen von Ventilen, in die erste Gangstufe zurück geschaltet werden kann, ohne dass dazu Schaltelemente in dem Getriebe betätigt werden müssen. Dementsprechend sieht das erfindungsgemäße Verfahren vor, dass nach Erfüllung einer Abschaltbedingung automatisch eine Gangstufe eingelegt wird, welche höher ist als die erste Gangstufe und aus welcher eine Rückschaltung in die erste Gangstufe ohne Betätigung eines Schaltelementes des automatischen Getriebes möglich ist. Nach dem Einlegen der Gangstufe wird der Verbrennungsmotor automatisch abgeschaltet und nach Erfüllung einer Wiederstartbedingung wird der Verbrennungsmotor automatisch wieder gestartet, wobei im Wiederstart und damit im Drehzahlhochlauf automatisch die erste Gangstufe eingelegt wird.The inventive method is based on the idea that an automatic transmission has at least one gear, often the second gear, from which, for. B. by merely opening valves, can be switched back to the first gear, without the need for switching elements must be operated in the transmission. Accordingly, the inventive method provides that after fulfilling a shutdown automatically a gear is engaged, which is higher than the first gear and from which a downshift into the first gear without actuating a switching element of the automatic transmission is possible. After engaging the gear, the engine is automatically switched off and after fulfilling a restart condition, the engine is automatically restarted, with the first gear is automatically engaged in the restart and thus in the speed-up.
Die eingelegte höhere Gangstufe zum Zeitpunkt des Wiederstarts stellt aufgrund des kleineren Übersetzungsverhältnisses einen ruckfreien Startvorgang sicher. Die unmittelbar nach dem Wiederstart durchgeführte Rückschaltung in die erste Gangstufe gewährleistet die erforderliche Dynamik bei der Weiterfahrt. Dabei wird ausgenutzt, dass diese Rückschaltung ohne Betätigung eines Schaltelementes im Getriebe erfolgen kann, so dass kein Hydraulikdruck erforderlich ist. Die vorliegende Erfindung weist somit den Vorteil auf, dass ohne jegliche Zusatzkomponente ein ruckfreier Wiederstart des Verbrennungsmotors möglich ist und dennoch die erforderliche Dynamik erzielbar ist.The engaged higher gear stage at the time of restarting ensures a smooth starting operation due to the smaller gear ratio. The downshift to the first gear stage, which is carried out immediately after the restart, ensures the required dynamics when driving onwards. It is exploited that this downshift can be done without actuation of a switching element in the transmission, so that no hydraulic pressure is required. The present invention thus has the advantage that a jerk-free restart of the internal combustion engine is possible without any additional component and yet the required dynamics can be achieved.
In den Unteransprüchen finden sich vorteilhafte Ausgestaltungen und Verbesserungen des in Patentanspruch 1 angegebenen Verfahrens.In the dependent claims are advantageous embodiments and improvements of the method specified in claim 1.
Gemäß einer bevorzugten Weiterbildung wird nach Erfüllung einer Abschaltbedingung der Verbrennungsmotor für eine vorgebbare erste Anzahl von Motorzyklen mit einem ersten Ventilhub betrieben und nach dem Einlegen der höheren Gangstufe, aber vor dem Abstellen des Verbrennungsmotors der Verbrennungsmotor für eine vorgebbare zweite Anzahl von Motorzyklen mit einem zweiten Ventilhub betrieben. Dabei ist der zweite Ventilhub größer als der erste Ventilhub.According to a preferred embodiment of the fulfillment of a shutdown condition of Engine operated for a predetermined first number of engine cycles with a first valve lift and operated after inserting the higher gear, but before switching off the engine, the internal combustion engine for a predetermined second number of engine cycles with a second valve lift. In this case, the second valve lift is greater than the first valve lift.
Vor dem Abschalten des Verbrennungsmotors wird der Verbrennungsmotor üblicherweise mit einem großen Ventilhub betrieben. Um nach Erfüllung einer Abschaltbedingung ein möglichst rasches Einlegen der höheren Gangstufe und damit ein möglichst rasches Abschalten des Verbrennungsmotors zu gewährleisten, wird der Verbrennungsmotor im Leerlauf kurzzeitig mit einem niedrigen Ventilhub betrieben und erst nach erfolgtem Gangwechsel auf den großen Ventilhub umgestellt, in welchem der Verbrennungsmotor schließlich abgeschaltet wird.Before switching off the internal combustion engine, the internal combustion engine is usually operated with a large valve lift. In order to ensure the fastest possible engagement of the higher gear and the fastest possible shutdown of the engine after fulfillment of a shutdown condition, the engine is briefly operated at idle with a low valve lift and converted only after a gear change to the large valve lift, in which the engine finally is switched off.
Die Aufgabe wird erfindungsgemäß auch durch ein automatisches Start-Stopp-System mit den Merkmalen gemäß des nebengeordneten Patentanspruchs gelöst.The object is achieved by an automatic start-stop system with the features according to the independent claim.
Das Start-Stopp-System umfasst dabei eine Auswerteeinheit zum Prüfen von Abschaltbedingungen, bei deren Erfüllung der Verbrennungsmotor automatisch abgeschaltet werden soll, sowie von Wiederstartbedingungen, bei deren Erfüllung der Verbrennungsmotor automatisch wieder gestartet werden soll. Das Start-Stopp-System umfasst außerdem eine Getriebesteuereinheit, welche das automatische Getriebe derart steuert, dass nach Erfüllung einer Abschaltbedingung aber vor dem Abschalten des Verbrennungsmotors eine Gangstufe eingelegt wird, welche höher ist als die erste Gangstufe und aus welcher eine Rückschaltung in die erste Gangstufe ohne Betätigung eines Schaltelementes des automatischen Getriebes möglich ist, und dass unmittelbar nach einem automatischen Wiederstart des Verbrennungsmotors die erste Gangstufe eingelegt wird.The start-stop system comprises an evaluation unit for checking shut-off conditions, in the fulfillment of which the internal combustion engine is to be switched off automatically, as well as restart conditions, during the fulfillment of which the internal combustion engine is to be automatically restarted. The start-stop system further includes a transmission control unit which controls the automatic transmission so that after completion of a shutdown condition but before the shutdown of the internal combustion engine, a gear is engaged, which is higher than the first gear and from which a downshift to the first gear without operation of a switching element of the automatic transmission is possible, and that immediately after an automatic restart of the internal combustion engine, the first gear is engaged.
Gemäß einer vorteilhaften Ausführungsform des erfindungsgemäßen Start-Stopp-Systems ist außerdem eine Motorsteuereinheit vorgesehen, welche den Verbrennungsmotor derart steuert, dass er nach Erfüllung der Abschaltbedingung für eine vorgebbare erste Anzahl von Motorzyklen mit einem ersten Ventilhub betrieben wird und nach dem Einlegen der höheren Gangstufe, aber vor dem Abstellen des Verbrennungsmotors für eine vorgebbare zweite Anzahl von Motorzyklen mit einem zweiten Ventilhub betrieben wird, wobei der zweite Ventilhub größer ist als der erste Ventilhub.According to an advantageous embodiment of the start-stop system according to the invention also an engine control unit is provided which controls the internal combustion engine such that it is operated after fulfillment of the shutdown condition for a predetermined first number of engine cycles with a first valve lift and after inserting the higher gear, but is operated before stopping the internal combustion engine for a predetermined second number of engine cycles with a second valve lift, wherein the second valve lift is greater than the first valve lift.
Ein weiterer Vorteil ergibt sich durch das Standabkoppeln. Hierbei wird beim Anhalten des Kraftfahrzeuges mit oder ohne Erfüllung der Abschaltbedingungen für den Verbrennungsmotor eine Standabkopplung umgesetzt. Diese Standabkopplung stellt aufgrund des aufgetrennten Kraftschlusses im Automatikgetriebe einen ruckfreien Wiederstart sicher.Another advantage is the stand decoupling. In this case, a standstill is implemented when stopping the motor vehicle with or without meeting the shutdown for the engine. This stall decoupling ensures a smooth restart due to the separated frictional connection in the automatic transmission.
Die Erfindung wird nachfolgend unter Bezugnahme auf die beiliegende Figur erläutert.The invention will be explained below with reference to the accompanying figure.
Es zeigen:Show it:
Zur Steuerung des Verbrennungsmotors
Um Treibstoff zu sparen, kann der Verbrennungsmotor
Zur Prüfung der Abschaltbedingungen und Wiederstartbedingungen empfängt die Auswerteeinheit
Um das Einlegen dieser Gangstufe in möglichst kurzer Zeit zu ermöglichen, wird nach Erfüllung einer Abschaltbedingung der Verbrennungsmotor
Wird durch die Auswerteeinheit
Damit wird ein Start-Stopp-System für ein Kraftfahrzeug mit Automatikgetriebe geschaffen, welches ohne jegliche Zusatzkomponente alle Anforderungen an Ruckfreiheit und Dynamik erfüllt.Thus, a start-stop system for a motor vehicle with automatic transmission is created, which meets all requirements for freedom from jerk and dynamics without any additional component.
Claims (5)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102013222811A1 (en) | 2013-11-11 | 2015-05-13 | Zf Friedrichshafen Ag | A method for shortening the reaction time of an automatic transmission of a motor vehicle comprising a hydraulic control device with a pressure regulator from an engine stop the start-stop system |
WO2017029045A1 (en) * | 2015-08-14 | 2017-02-23 | Zf Friedrichshafen Ag | Method for operating an automatic gearbox of a motor vehicle |
GB2547959A (en) * | 2016-01-08 | 2017-09-06 | Cummins Inc | Communication interface for start-stop systems and methods |
US10352439B2 (en) | 2015-08-14 | 2019-07-16 | Zf Friedrichshafen Ag | Method for operating an automatic transmission of a motor vehicle |
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DE102013222811A1 (en) | 2013-11-11 | 2015-05-13 | Zf Friedrichshafen Ag | A method for shortening the reaction time of an automatic transmission of a motor vehicle comprising a hydraulic control device with a pressure regulator from an engine stop the start-stop system |
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US20180238442A1 (en) * | 2015-08-14 | 2018-08-23 | Zf Friedrichshafen Ag | Method for operating an automatic gearbox of a motor vehicle |
US10352439B2 (en) | 2015-08-14 | 2019-07-16 | Zf Friedrichshafen Ag | Method for operating an automatic transmission of a motor vehicle |
CN107850206B (en) * | 2015-08-14 | 2019-08-20 | Zf 腓德烈斯哈芬股份公司 | Method for running the automatic transmission of motor vehicle |
US10436314B2 (en) | 2015-08-14 | 2019-10-08 | Zf Friedrichshafen Ag | Method for operating an automatic gearbox of a motor vehicle |
GB2547959A (en) * | 2016-01-08 | 2017-09-06 | Cummins Inc | Communication interface for start-stop systems and methods |
US10081361B2 (en) | 2016-01-08 | 2018-09-25 | Cummins Inc. | Communication interface for start-stop systems and methods |
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US10773720B2 (en) | 2016-01-08 | 2020-09-15 | Cummins, Inc. | Communication interface for start-stop systems and methods |
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