DE102013205385B3 - Method for defined braking of rotating components in automatic transmission of motor vehicle during shut-off of engine, involves reporting engine shutdown over electrical system of transmission - Google Patents

Method for defined braking of rotating components in automatic transmission of motor vehicle during shut-off of engine, involves reporting engine shutdown over electrical system of transmission Download PDF

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Publication number
DE102013205385B3
DE102013205385B3 DE201310205385 DE102013205385A DE102013205385B3 DE 102013205385 B3 DE102013205385 B3 DE 102013205385B3 DE 201310205385 DE201310205385 DE 201310205385 DE 102013205385 A DE102013205385 A DE 102013205385A DE 102013205385 B3 DE102013205385 B3 DE 102013205385B3
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Germany
Prior art keywords
transmission
engine
motor vehicle
rotating components
automatic transmission
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DE201310205385
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German (de)
Inventor
Marc Klein
Joachim Berrang
Björn Lamber
Jörg Hockertz
Joachim König
Tim Geiß
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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Classifications

    • 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
    • F16H61/14—Control of torque converter lock-up clutches
    • F16H61/143—Control of torque converter lock-up clutches using electric control means
    • 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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/45—Engine shutdown at standstill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/09—Reducing noise
    • 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
    • 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
    • F16H2312/20—Start-up or shut-down

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

The method involves reporting an engine shutdown over an electrical system of the transmission, where a converter clutch or one or multiple switching elements is acted upon in the transmission over a timer-controlled variable with pressure such that the turbine speed is equalized to the engine speed. The residual pressure is used in hydraulic system of the transmission for controlling the converter clutch or one or multiple switching elements.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors gemäß dem Oberbegriff des Patentanspruchs 1. The present invention relates to a method for defined braking of rotating components in an automatic transmission of a motor vehicle when stopping the engine according to the preamble of patent claim 1.

Beim Abstellen des Motors laufen die durch den Motor angetriebenen Bauteile im Getriebe bis zum Stillstand aus. In den Getriebepositionen "Park" oder "Neutral" ist im Automatgetriebe kein Kraftschluss bis zu den Antriebsrädern hergestellt. Die Turbine des Wandlers wird über den hydrodynamischen Kreislauf von der Pumpe des Wandlers angetrieben, wobei sich dadurch die Getriebeeingangswelle dreht, da sie mit der Turbine des Wandlers verbunden ist. Wird der Motor abgestellt, läuft dieser bis zum Stillstand aus, was zur Folge hat, dass auch die Turbine bzw. die Getriebeeingangswelle nicht mehr angetrieben werden und somit bis zum Stillstand auslaufen. When the engine is switched off, the components driven by the engine in the transmission coast to a standstill. In the "Park" or "Neutral" gearbox positions, there is no traction in the automatic transmission up to the drive wheels. The turbine of the converter is driven via the hydrodynamic circuit by the pump of the converter, thereby rotating the transmission input shaft, since it is connected to the turbine of the converter. If the engine is turned off, it runs to a standstill, with the result that the turbine or the transmission input shaft are no longer driven and thus run to a standstill.

In der Regel sinkt die Motordrehzahl schneller bis zum Stillstand ab als die Drehzahl der drehenden Bauteile im Getriebe, so dass es in der Zeitspanne vom Stillstand des Motors bis die drehenden Bauteile im Getriebe zum Stillstand gekommen sind in nachteiliger Weise durch Bewegungen von Getriebebauteilen zu unerwünschten akustischen Auffälligkeiten kommen kann. In general, the engine speed drops faster to a standstill than the rotational speed of the rotating components in the transmission, so that it has come to a standstill in the period from standstill of the engine to the rotating components in the transmission disadvantageously by movements of transmission components to unwanted acoustic Abnormalities can occur.

Aus der DE 10 2007 003 726 A1 der Anmelderin geht ein Verfahren zum Betreiben eines Fahrzeugantriebsstranges mit einer zum betriebszustandsabhängigen Zu- und Abschalten über ein Motor-Start-Automatik-System betätigbaren Brennkraftmaschine und einem Abtrieb, die über eine Verbindungseinrichtung miteinander in Wirkverbindung bringbar sind, hervor. Hierbei weist die Verbindungseinrichtung wenigstens ein mit betriebszustandsabhängig variierbarer Übertragungsfähigkeit ausgebildetes Schaltelement auf, welches eine Anfahrkupplung oder eine Wandlerüberbrückungskupplung sein kann, dessen Übertragungsfähigkeit im Schubbetrieb des Fahrzeugantriebsstranges und bei Vorliegen einer Anforderung des Motor-Start-Automatik-Systems zum Abschalten der Brennkraftmaschine auf einen in Abhängigkeit eines Betriebszustands des Fahrzeugantriebsstranges variierbaren ersten Sollwert eingestellt wird, zu dem über das Schaltelement Drehmoment führbar ist und zu dem eine Drehzahl der Brennkraftmaschine an eine Drehzahl des Abtriebs oder an eine zu der Drehzahl des Abtriebs äquivalente Drehzahl angepasst wird. From the DE 10 2007 003 726 A1 the applicant is a method for operating a vehicle powertrain with an operable state-dependent activation and deactivation via an engine-start-automatic system operable internal combustion engine and an output, which can be brought together via a connecting means in operative connection, out. In this case, the connecting device has at least one switchable with operating state-dependent variable transmission capability switching element, which may be a starting clutch or a lockup clutch whose transmission capacity in overrun of the vehicle drive train and in the presence of a request of the engine start-automatic system for switching off the internal combustion engine to a depending an operating state of the vehicle driveline variable first setpoint is set, to which via the switching element torque is feasible and to which a speed of the internal combustion engine is adapted to a rotational speed of the output or at an equivalent speed to the rotational speed of the output.

Ferner geht aus der DE 10 2011 005 284 A1 der Anmelderin ein Verfahren zur Realisierung des Segelbetriebs bei einem Kraftfahrzeug mit einem Automatgetriebe hervor, im Rahmen dessen die Wandlerüberbrückungskupplung des Automatgetriebes geschlossen oder in einen Zustand mit geringem Schlupf überführt wird, wobei die Drehmomentübertragungsfähigkeit mindestens eines im Fahrgang, aus dem in den Segelbetrieb eingestiegen wird, drehmomentführenden Schaltelementes derart abgesenkt wird, dass sich im Schaltelement ein Schlupf einstellt. Furthermore, goes from the DE 10 2011 005 284 A1 in the context of which the torque converter lockup clutch of the automatic transmission is closed or transferred to a state of low slip, the torque transmission capability of at least one in the drive, from which is entered in the sailing operation, the Applicant a method for realizing the sail operation in a motor vehicle with an automatic transmission torque-conducting switching element is lowered so that sets a slip in the switching element.

Ferner ist im Rahmen der EP 2 280 195 A1 der Anmelderin ein Verfahren zur Steuerung eines Automatgetriebes eines Kraftfahrzeuges umfassend mindestens einen Planetenradsatz und einen im Drehmomentfluss vorgeschalteten Drehmomentwandler mit einer Wandlerüberbrückungskupplung beschrieben. Hierbei wird die Wandlerüberbrückungskupplung bei im Wesentlichen stehendem Kraftfahrzeug in Richtung Schließen betätigt. Furthermore, under the EP 2 280 195 A1 the applicant describes a method for controlling an automatic transmission of a motor vehicle comprising at least one planetary gear and a torque converter upstream in torque flow with a lockup clutch. In this case, the lockup clutch is actuated in the substantially stationary motor vehicle in the direction of closing.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors anzugeben, durch dessen Durchführung die Motor- und Getriebedrehzahl gemeinsam bis zum Stillstand auslaufen. Dadurch sollen die durch Bewegungen von Getriebebauteilen bei stillstehendem Motor verursachten unerwünschten akustischen Auffälligkeiten vermieden werden. The present invention has for its object to provide a method for the defined braking of rotating components in an automatic transmission of a motor vehicle when stopping the engine through the implementation of the engine and transmission speed together expire to a standstill. As a result, the unwanted acoustic abnormalities caused by movements of transmission components with the engine stopped should be avoided.

Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor. This object is solved by the features of patent claim 1. Further embodiments and advantages of the invention will become apparent from the dependent claims.

Demnach wird ein Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors vorgeschlagen, im Rahmen dessen, wenn über das Bordnetz dem Getriebe eine Motorabschaltung gemeldet wird, die Wandlerkupplung über einen Timer gesteuert variabel mit Druck derart beaufschlagt wird, dass die Turbinendrehzahl an die Motordrehzahl angeglichen wird. Dadurch wird erreicht, dass die Motor- und Getriebedrehzahl gemeinsam bis zum Stillstand auslaufen. Bei einem Neustart des Motors ist die Durchführung des Verfahrens automatisch deaktiviert. Accordingly, a method for the defined braking of rotating components in an automatic transmission of a motor vehicle when stopping the engine is proposed, in the context of which, when the vehicle electrical system is reported via the electrical system, the converter clutch is controlled by a timer variably pressurized so that the Turbine speed is matched to the engine speed. This ensures that the engine and transmission speed run together to a standstill. When the engine is restarted, the procedure is automatically deactivated.

Alternativ zur Ansteuerung der Wandlerkupplung können ein oder mehrere Schaltelemente im Getriebe mit Druck beaufschlagt werden, so dass die drehenden Bauteile im Getriebe definiert abgebremst werden, um ein Angleichen der Turbinendrehzahl an die Motordrehzahl zu bewirken. As an alternative to the control of the converter clutch, one or more shift elements in the transmission can be pressurized, so that the rotating components in the transmission are braked in a defined manner in order to bring about an adjustment of the turbine speed to the engine speed.

Zur Ansteuerung der Wandlerkupplung oder der Schaltelemente ist genügend Restdruck im hydraulischen System des Getriebes vorhanden, obwohl die Pumpe auch ausläuft, da die Pumpenförderleistung erst weit unter der Leerlaufdrehzahl des Motors nicht mehr gewährleistet ist. Ferner ist auch die Stromversorgung der elektronischen Getriebesteuerung gewährleistet, da die Stromzufuhr nicht mit dem Abstellen des Motors abgeschaltet wird. To control the converter clutch or switching elements sufficient residual pressure in the hydraulic system of the transmission is present, although the pump also expires, since the pump delivery is not guaranteed much below the idle speed of the engine. Furthermore, the power supply of the electronic transmission control is guaranteed, since the power supply is not switched off when the engine is switched off.

Das hier vorgestellte Verfahren funktioniert in den Getriebepositionen P oder N, in denen der Fahrer üblicherweise den Motor abstellt. Für den Fall, dass der Motor abgestellt wird, wenn sich das Getriebe in einer kraftschlüssigen Position befindet (beispielsweise R oder D), beispielsweise wenn der Fahrer irrtümlicherweise aus einer kraftschlüssigen Position den Motor abstellt oder wenn die Getriebesteuerung im Rahmen einer Standabkopplung mit Motor-Start-Stopp-Automatik den Motor abstellt, wird vor der Ansteuerung der Wandlerkupplung oder der Schaltelemente zumindest eins der zuvor geschlossenen Schaltelemente geöffnet, um ein Verspannen im Antriebsstrang und Komforteinbußen zu verhindern. The method presented here works in the gear positions P or N, in which the driver usually turns off the engine. In the event that the engine is stopped, when the transmission is in a non-positive position (such as R or D), for example, if the driver erroneously turns off the engine from a positive position or if the transmission control in the context of a standstill with engine start Stop automatic switches off the engine, at least one of the previously closed switching elements is opened before driving the converter clutch or the switching elements to prevent distortion in the drive train and loss of comfort.

Claims (3)

Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors, dadurch gekennzeichnet, dass wenn über das Bordnetz dem Getriebe eine Motorabschaltung gemeldet wird, die Wandlerkupplung oder ein oder mehrere Schaltelemente im Getriebe über einen Timer gesteuert variabel mit Druck derart beaufschlagt werden, dass die Turbinendrehzahl an die Motordrehzahl angeglichen wird. Method for defined braking of rotating components in an automatic transmission of a motor vehicle when the engine is switched off, characterized in that when the vehicle transmission via the on-board network engine shutdown is reported, the converter clutch or one or more switching elements in the transmission via a timer controlled variably be pressurized with pressure in that the turbine speed is matched to the engine speed. Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors nach Anspruch 1, dadurch gekennzeichnet, dass für den Fall, dass der Motor abgestellt wird, wenn sich das Getriebe in einer kraftschlüssigen Position befindet, vor der Ansteuerung der Wandlerkupplung oder eines oder mehrerer Schaltelemente zumindest eins der zuvor geschlossenen Schaltelemente geöffnet wird, um ein Verspannen im Antriebsstrang und Komforteinbußen zu verhindern. A method for defined braking of rotating components in an automatic transmission of a motor vehicle when stopping the engine according to claim 1, characterized in that in the event that the engine is turned off when the transmission is in a non-positive position, before driving the converter clutch or a or more switching elements at least one of the previously closed switching elements is opened to prevent distortion in the drive train and comfort losses. Verfahren zum definierten Abbremsen drehender Bauteile in einem Automatgetriebe eines Kraftfahrzeugs beim Abstellen des Motors nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zur Ansteuerung der Wandlerkupplung oder eines oder mehrerer Schaltelemente der Restdruck im hydraulischen System des Getriebes verwendet wird. Method for the defined braking of rotating components in an automatic transmission of a motor vehicle when stopping the engine according to claim 1 or 2, characterized in that the residual pressure in the hydraulic system of the transmission is used to control the converter clutch or one or more switching elements.
DE201310205385 2013-03-27 2013-03-27 Method for defined braking of rotating components in automatic transmission of motor vehicle during shut-off of engine, involves reporting engine shutdown over electrical system of transmission Active DE102013205385B3 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014221747A1 (en) * 2014-10-27 2016-04-28 Zf Friedrichshafen Ag Method for operating a vehicle drive train
DE102017203348A1 (en) 2017-03-01 2018-09-06 Zf Friedrichshafen Ag Method and control device for operating a motor vehicle
DE102017215805A1 (en) 2017-09-07 2019-03-07 Zf Friedrichshafen Ag A method for defined braking of rotating parts in an automatic transmission of a motor vehicle comprising an electrically driven auxiliary oil pump when stopping the engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007003726A1 (en) * 2007-01-25 2008-07-31 Zf Friedrichshafen Ag Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side
EP2280195A1 (en) * 2009-07-27 2011-02-02 ZF Friedrichshafen AG Method for controlling a lock up clutch of a hydrodynamic converter
DE102011005284A1 (en) * 2011-03-09 2012-09-13 Zf Friedrichshafen Ag Method for realization of sail operation in motor vehicle, involves closing lock-up clutch of automatic transmission or placing lock-up clutch of automatic transmission in low slip state, during sail operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007003726A1 (en) * 2007-01-25 2008-07-31 Zf Friedrichshafen Ag Internal-combustion engine's vehicle drive train operating method for use in e.g. car, involves adjusting negotiability of switching element to reference value for switching off engine, and adjusting speed of engine to speed of output side
EP2280195A1 (en) * 2009-07-27 2011-02-02 ZF Friedrichshafen AG Method for controlling a lock up clutch of a hydrodynamic converter
DE102011005284A1 (en) * 2011-03-09 2012-09-13 Zf Friedrichshafen Ag Method for realization of sail operation in motor vehicle, involves closing lock-up clutch of automatic transmission or placing lock-up clutch of automatic transmission in low slip state, during sail operation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014221747A1 (en) * 2014-10-27 2016-04-28 Zf Friedrichshafen Ag Method for operating a vehicle drive train
DE102017203348A1 (en) 2017-03-01 2018-09-06 Zf Friedrichshafen Ag Method and control device for operating a motor vehicle
DE102017215805A1 (en) 2017-09-07 2019-03-07 Zf Friedrichshafen Ag A method for defined braking of rotating parts in an automatic transmission of a motor vehicle comprising an electrically driven auxiliary oil pump when stopping the engine
DE102017215805B4 (en) 2017-09-07 2024-09-12 Zf Friedrichshafen Ag Method for the defined braking of rotating parts in an automatic transmission of a motor vehicle comprising an electrically driven additional oil pump when the engine is switched off

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