WO2003074314A2 - Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle - Google Patents

Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle Download PDF

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Publication number
WO2003074314A2
WO2003074314A2 PCT/DE2003/000652 DE0300652W WO03074314A2 WO 2003074314 A2 WO2003074314 A2 WO 2003074314A2 DE 0300652 W DE0300652 W DE 0300652W WO 03074314 A2 WO03074314 A2 WO 03074314A2
Authority
WO
WIPO (PCT)
Prior art keywords
creep torque
vehicle
brake pressure
brake
transmission
Prior art date
Application number
PCT/DE2003/000652
Other languages
German (de)
French (fr)
Other versions
WO2003074314A3 (en
Inventor
Reinhard Berger
Klaus KÜPPER
Original Assignee
Luk Lamellen Und Kupplungsbau Beteiligungs Kg
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
Priority claimed from DE10308698A external-priority patent/DE10308698A1/en
Priority claimed from DE10308690A external-priority patent/DE10308690A1/en
Priority claimed from DE10308712.5A external-priority patent/DE10308712B4/en
Priority claimed from DE10308692A external-priority patent/DE10308692A1/en
Priority claimed from DE10308713.3A external-priority patent/DE10308713B4/en
Priority claimed from DE10308691A external-priority patent/DE10308691A1/en
Priority claimed from DE10308714A external-priority patent/DE10308714A1/en
Priority claimed from DE10308716A external-priority patent/DE10308716A1/en
Priority claimed from DE10308689A external-priority patent/DE10308689A1/en
Priority claimed from DE10308700.1A external-priority patent/DE10308700B4/en
Priority to PCT/DE2003/000652 priority Critical patent/WO2003074314A2/en
Priority to AU2003215516A priority patent/AU2003215516A1/en
Priority to DE10390838T priority patent/DE10390838D2/en
Priority claimed from DE10308748A external-priority patent/DE10308748A1/en
Priority claimed from DE10308697A external-priority patent/DE10308697A1/en
Application filed by Luk Lamellen Und Kupplungsbau Beteiligungs Kg filed Critical Luk Lamellen Und Kupplungsbau Beteiligungs Kg
Priority to DE10308699A priority patent/DE10308699A1/en
Priority claimed from DE10308719A external-priority patent/DE10308719A1/en
Priority to FR0302754A priority patent/FR2840660B1/en
Publication of WO2003074314A2 publication Critical patent/WO2003074314A2/en
Publication of WO2003074314A3 publication Critical patent/WO2003074314A3/en

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Classifications

    • 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
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18063—Creeping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/122—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger for locking of reverse movement
    • 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
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • 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
    • 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
    • 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
    • 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
    • B60W30/18—Propelling the vehicle
    • B60W30/1819—Propulsion control with control means using analogue circuits, relays or mechanical links
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D29/00—Clutches and systems of clutches involving both fluid and magnetic actuation
    • F16D29/005—Clutches and systems of clutches involving both fluid and magnetic actuation with a fluid pressure piston driven by an electric motor
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/08—Regulating clutch take-up on starting
    • 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
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/18—Braking system
    • B60W2510/182—Brake pressure, e.g. of fluid or between pad and disc
    • 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
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/12—Brake pedal position
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1023—Electric motor
    • F16D2500/1025—Electric motor with threaded transmission
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1026—Hydraulic
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle speed
    • F16D2500/3111—Standing still, i.e. signal detecting when the vehicle is standing still or bellow a certain limit speed
    • 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
    • F16H2312/06—Creeping

Definitions

  • the invention relates to an automated transmission and a method for controlling a creep torque in the transmission of a vehicle.
  • automated manual transmissions and parallel shift transmissions (PSG) are known as automatic transmissions from vehicle technology. It has been shown that with such transmissions it can happen that the vehicle rolls back briefly when starting on a mountain. This may be because the creep torque on the clutch is only built up when the driver has released the brake.
  • the invention has for its object a transmission and a method for controlling a creep torque in an automated transmission
  • Propose vehicle, in particular rolling back of the vehicle is avoided when driving uphill.
  • This object is achieved, on the one hand, according to the invention by a method for controlling a creeping torque on a clutch in an automated transmission, in which the time of construction and / or the course of the creeping torque is determined as a function of at least one operating parameter of the vehicle. Depending on the selected operating parameter, this can be used to implement an improved creep strategy for the vehicle.
  • the brake pressure of the vehicle brake can preferably be used as the operating parameter.
  • the method according to the invention can, for. B. implement a hill start aid by building up the creep torque or activating a creep torque at the start of releasing the brake. This can be achieved by the fact that
  • Creep torque depending on the brake pressure is built up, for example. It is also possible for any other operating parameters of the vehicle to be used are, with operating parameters any motor, gear size or the like is to be understood. It is possible that the creep torque can also be built up as a function of predetermined driving conditions. Accordingly, rolling back of the vehicle, in particular when driving uphill, can be prevented by creeping moment build-up as early as possible.
  • the creep torque is built up when the brake pressure coming from above falls below a defined threshold value. This means that the brake is initially closed and the brake pressure z. B. is slowly reduced because the driver goes with his foot from the brake pedal, for example. The creep torque should only be built up if the vehicle falls below a certain threshold to be determined, in order to prevent the vehicle from rolling back.
  • the creep torque on the clutch is built up in a function-dependent manner, preferably on the brake pressure. For example, a steadily increasing creep torque can be built up with decreasing brake pressure until the maximum permissible creep torque is preferably applied to the clutch.
  • the creep torque is increased, for example, in a continuously linear, progressive, degressive or also stepwise manner with decreasing brake pressure.
  • the method according to the invention thus prevents the creep torque from generally being built up at low brake pressures. Otherwise, the vehicle could not be stopped, for example in the plane, even with slight brake application. Furthermore, continuous creeping against the brake can be prevented by the method for controlling the creep torque according to the invention. This means that fuel consumption when idling and any disturbing vibrations in the vehicle can also be avoided.
  • the tactile point determination is combined with the creep strategy in the method according to the invention.
  • the method presented proposes a hill start aid in which a creep torque build-up is provided as a function of the brake pressure and the brake pressure threshold value.
  • This hill start aid can also be used, for example, in other driving situations and is preferably used in automated manual transmissions (ASG), parallel shift transmissions (PSG) or similar transmission systems.
  • the object of the invention can be achieved by an automatic transmission for a vehicle, in which at least one device for controlling a creep torque is provided as a function of at least one operating parameter.
  • the transmission according to the invention can preferably be used to carry out the proposed method.
  • the device preferably has at least one sensor or the like for recognizing the operating parameter.
  • a hill start aid for the vehicle is advantageously implemented in which, for example, as the operating parameter.
  • B. the brake pressure of the vehicle brake is used.
  • FIG. 1 shows a flow diagram of a method according to the invention
  • FIG. 2 shows a course of the creep torque as a function of the brake pressure
  • Figure 3 shows a sudden curve of the creep torque depending on the
  • FIG. 4 shows a course of the creeping torque as a function of the brake pressure, with a low creeping torque when closing and an increased creeping torque when opening the brake.
  • FIG. 1 The method according to the invention is illustrated in FIG. 1 using a flow chart.
  • Vehicle brake is less than a threshold value p_Brems_Schwelle the brake pressure. If not, the process is ended without the creep torque building up. If so, z. B. builds up a creep torque depending on the falling brake pressure so that the vehicle does not roll back on a slope when releasing the brake.
  • FIGS. 2 to 4 show various possible functional relationships between the brake pressure p_Brems_neu and the creeping torque, the course of the creeping torque when the brake is opened being indicated by a solid line and the course of the creeping torque when the brake is applied is indicated by a dotted line.
  • the creep torque is built up in a ramp shape when the brake pressure p_Brems_neu drops to open the brake.
  • the creeping moment builds up suddenly.
  • a curve of the creep torque is shown in FIG. 4, a slight one when the brake is applied
  • Creep torque and an increased creep torque is provided when the brake is opened.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)

Abstract

The invention relates to a method for controlling a creeping torque on a clutch of an automatic transmission. The time at which the creeping torque builds up and/or the course of the creeping torque are/is determined according to at least one operating parameter of the vehicle. The invention also relates to a transmission for a vehicle, particularly for carrying out the method, in which a device for controlling a creeping torque according to at least one operating parameter is provided.

Description

Getriebe und Verfahren zum Ansteuern eines Kriechmomentes bei einem automatischen Getriebe eines Fahrzeuges Transmission and method for controlling a creep torque in an automatic transmission of a vehicle
Die Erfindung betrifft ein automatisiertes Getriebe und ein Verfahren zum Ansteuern eines Kriechmomentes bei dem Getriebe eines Fahrzeuges.The invention relates to an automated transmission and a method for controlling a creep torque in the transmission of a vehicle.
Beispielsweise sind aus der Fahrzeugtechnik automatisierte Schaltgetriebe (ASG) und Parallelschaltgetriebe (PSG) als automatische Getriebe bekannt. Es hat sich gezeigt, dass es bei derartigen Getrieben vorkommen kann, dass das Fahrzeug beim Anfahren an einem Berg kurzzeitig zurückrollt. Dies kann daran liegen, dass das Kriechmoment an der Kupplung erst aufgebaut wird, wenn der Fahrer die Bremse gelöst hat.For example, automated manual transmissions (ASG) and parallel shift transmissions (PSG) are known as automatic transmissions from vehicle technology. It has been shown that with such transmissions it can happen that the vehicle rolls back briefly when starting on a mountain. This may be because the creep torque on the clutch is only built up when the driver has released the brake.
Der Erfindung liegt die Aufgabe zugrunde, ein Getriebe und ein Verfahren zum Ansteuern eines Kriechmomentes bei einem automatisierten Getriebe einesThe invention has for its object a transmission and a method for controlling a creep torque in an automated transmission
Fahrzeuges vorzuschlagen, wobei insbesondere bei einer Berganfahrt ein Zurückrollen des Fahrzeuges vermieden wird.Propose vehicle, in particular rolling back of the vehicle is avoided when driving uphill.
Diese Aufgabe wird zum einen erfindungsgemäß durch ein Verfahren zum Ansteuern eines Kriechmomentes an einer Kupplung bei einem automatisierten Getriebe gelöst, bei dem der Zeitpunkt des Aufbaus und/oder der Verlauf des Kriechmoments in Abhängigkeit von zumindest einem Betriebsparameter des Fahrzeuges bestimmt wird. Auf diese kann in Abhängigkeit von dem gewählten Betriebsparameter eine verbesserte Kriechstrategie bei dem Fahrzeug realisiert werden.This object is achieved, on the one hand, according to the invention by a method for controlling a creeping torque on a clutch in an automated transmission, in which the time of construction and / or the course of the creeping torque is determined as a function of at least one operating parameter of the vehicle. Depending on the selected operating parameter, this can be used to implement an improved creep strategy for the vehicle.
Im Rahmen einer Ausgestaltung der vorliegenden Erfindung kann vorzugsweise als Betriebsparameter der Bremsdruck der Fahrzeugbremse verwendet werden. In diesem Fall kann das erfindungsgemäße Verfahren z. B. eine Berganfahrhilfe durch einen Aufbau des Kriechmomentes bzw. eine Kriechmomentaktivierung zu Beginn des Lösens der Bremse realisieren. Dies kann dadurch erreicht werden, dass dasIn the context of an embodiment of the present invention, the brake pressure of the vehicle brake can preferably be used as the operating parameter. In this case, the method according to the invention can, for. B. implement a hill start aid by building up the creep torque or activating a creep torque at the start of releasing the brake. This can be achieved by the fact that
Kriechmoment in Abhängigkeit des Bremsdrucks beispielsweise aufgebaut wird. Es ist auch möglich, dass andere beliebige Betriebsparameter des Fahrzeuges verwendet werden, wobei unter Betriebsparameter jede Motor-, Getriebegröße oder dergleichen zu verstehen ist. Möglicherweise kann der Aufbau des Kriechmoments auch in Abhängigkeit von vorbestimmten Fahrzuständen erfolgen. Demnach kann durch einen möglichst frühzeitigen Kriechmomentenaufbau ein Zurückrollen des Fahrzeuges, insbesondere bei Berganfahrten, verhindert werden.Creep torque depending on the brake pressure is built up, for example. It is also possible for any other operating parameters of the vehicle to be used are, with operating parameters any motor, gear size or the like is to be understood. It is possible that the creep torque can also be built up as a function of predetermined driving conditions. Accordingly, rolling back of the vehicle, in particular when driving uphill, can be prevented by creeping moment build-up as early as possible.
Gemäß einer Weiterbildung kann vorgesehen sein, dass das Kriechmoment aufgebaut wird, wenn der Bremsdruck von oben kommend einen definierten Schwellenwert unterschreitet. Dies bedeutet, dass die Bremse zunächst geschlossen ist und der Bremsdruck z. B. langsam verringert wird, da der Fahrer beispielsweise mit seinem Fuß von dem Bremspedal geht. Erst wenn ein bestimmter, festzulegender Schwellenwert unterschritten wird, sollte das Kriechmoment aufgebaut werden, um somit ein Zurückrollen des Fahrzeuges zu verhindern.According to a further development, it can be provided that the creep torque is built up when the brake pressure coming from above falls below a defined threshold value. This means that the brake is initially closed and the brake pressure z. B. is slowly reduced because the driver goes with his foot from the brake pedal, for example. The creep torque should only be built up if the vehicle falls below a certain threshold to be determined, in order to prevent the vehicle from rolling back.
Es ist auch möglich, dass, wenn der Bremsdruck von oben kommend einen definierten Schwellenwert unterschreitet, das Kriechmoment an der Kupplung in funktionaler Abhängigkeit bevorzugt vom Bremsdruck aufgebaut wird. Beispielsweise kann mit abnehmendem Bremsdruck ein stetig steigendes Kriechmoment aufgebaut werden, bis vorzugsweise das maximale zulässige Kriechmoment an der Kupplung anliegt.It is also possible that if the brake pressure coming from above falls below a defined threshold value, the creep torque on the clutch is built up in a function-dependent manner, preferably on the brake pressure. For example, a steadily increasing creep torque can be built up with decreasing brake pressure until the maximum permissible creep torque is preferably applied to the clutch.
Erfindungsgemäß kann auch vorgesehen sein, dass das Kriechmoment beispielsweise stetig linear, progressiv, degressiv oder auch stufenweise mit abnehmendem Bremsdruck erhöht wird.According to the invention, it can also be provided that the creep torque is increased, for example, in a continuously linear, progressive, degressive or also stepwise manner with decreasing brake pressure.
Um zu verhindern, dass sich das Fahrzeug nach dem Aktivieren des Kriechmomentes fortbewegt, auch wenn der Fahrer noch auf dem Bremspedal steht, ist eine Korrelation mit dem sinkenden Bremsdruck besonders vorteilhaft. Wenn das Fahrzeug an einer Steigung vom Fahrer mit der Bremse gehalten wird, kann davon ausgegangen werden, dass der Bremsdruck-Schwellenwert überschritten wird. Somit kann bereits beim Lösen der Bremse das Kriechen als Anfahrhilfe aktiviert werden. Es sind auch andere mögliche Abhängigkeiten bei der Berücksichtigung des Aufbaus des Kriechmomentes denkbar.In order to prevent the vehicle from moving after activation of the creeping torque, even when the driver is still on the brake pedal, a correlation with the falling brake pressure is particularly advantageous. If the driver holds the vehicle with the brake on a slope, it can be assumed that the brake pressure threshold is exceeded. This means that creep can be activated as a starting aid when the brake is released. There are others too possible dependencies when considering the structure of the creep torque conceivable.
Somit wird durch das erfindungsgemäße Verfahren verhindert werden, dass generell bei niedrigen Bremsdrücken der Aufbau des Kriechmomentes durchgeführt wird. Ansonsten könnte das Fahrzeug auch bei leichter Bremsbetätigung beispielsweise in der Ebene nicht angehalten werden. Ferner kann durch das Verfahren zum Ansteuern des Kriechmomentes gemäß der Erfindung ein Dauerkriechen gegen die Bremse verhindert werden. Somit kann auch der Kraftstoffverbrauch im Leerlauf und eventuell störende Vibrationen im Fahrzeug vermieden werden.The method according to the invention thus prevents the creep torque from generally being built up at low brake pressures. Otherwise, the vehicle could not be stopped, for example in the plane, even with slight brake application. Furthermore, continuous creeping against the brake can be prevented by the method for controlling the creep torque according to the invention. This means that fuel consumption when idling and any disturbing vibrations in the vehicle can also be avoided.
Im Rahmen einer Weiterbildung der vorliegenden Erfindung kann vorgesehen sein, dass die Tastpunktermittlung mit der Kriechstrategie bei dem erfindungsgemäßen Verfahren kombiniert werden.As part of a further development of the present invention, it can be provided that the tactile point determination is combined with the creep strategy in the method according to the invention.
Durch das vorgestellte Verfahren wird eine Berganfahrhilfe vorgeschlagen, bei der ein Kriechmomentenaufbau in Abhängigkeit des Bremsdruckes und des Bremsdruck- Schwellenwertes vorgesehen wird. Diese Berganfahrhilfe kann beispielsweise auch bei anderen Fahrsituationen verwendet und bevorzugt bei automatisierten Schaltgetrieben (ASG), Parallelschaltgetrieben (PSG) oder dergleichen Getriebesystemen eingesetzt werden.The method presented proposes a hill start aid in which a creep torque build-up is provided as a function of the brake pressure and the brake pressure threshold value. This hill start aid can also be used, for example, in other driving situations and is preferably used in automated manual transmissions (ASG), parallel shift transmissions (PSG) or similar transmission systems.
Ferner kann die Aufgabe der Erfindung durch ein automatisches Getriebe für ein Fahrzeug gelöst werden, bei dem zumindest eine Einrichtung zum Ansteuern eines Kriechmomentes in Abhängigkeit zumindest eines Betriebsparameters vorgesehen ist. Das erfindungsgemäße Getriebe kann vorzugsweise zum Durchführen des vorgeschlagenen Verfahrens verwendet werden.Furthermore, the object of the invention can be achieved by an automatic transmission for a vehicle, in which at least one device for controlling a creep torque is provided as a function of at least one operating parameter. The transmission according to the invention can preferably be used to carry out the proposed method.
Vorzugsweise weist die Einrichtung zumindest einen Sensor oder dergleichen zum Erkennen des Betriebsparameters auf. Durch die Verwendung der Einrichtung in dem Getriebe wird in vorteilhafter Weise eine Berganfahrhilfe für das Fahrzeug realisiert, bei der als Betriebsparameter z. B. der Bremsdruck der Fahrzeugbremse verwendet wird. Weitere Vorteile und vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen und den nachfolgend beschriebenen Zeichnungen. Es zeigen:The device preferably has at least one sensor or the like for recognizing the operating parameter. By using the device in the transmission, a hill start aid for the vehicle is advantageously implemented in which, for example, as the operating parameter. B. the brake pressure of the vehicle brake is used. Further advantages and advantageous configurations result from the subclaims and the drawings described below. Show it:
Figur 1 ein Flussdiagramm eines erfindungsgemäßen Verfahrens;FIG. 1 shows a flow diagram of a method according to the invention;
Figur 2 einen Verlauf des Kriechmomentes in Abhängigkeit des Bremsdruckes;FIG. 2 shows a course of the creep torque as a function of the brake pressure;
Figur 3 einen sprungartigen Verlauf des Kriechmomentes in Abhängigkeit desFigure 3 shows a sudden curve of the creep torque depending on the
Bremsdruckes; undBrake pressure; and
Figur 4 einen Verlauf des Kriechmomentes in Abhängigkeit des Bremsdruckes, wobei ein geringes Kriechmoment beim Schließen und ein erhöhtes Kriechmoment beim Öffnen der Bremse vorliegt.FIG. 4 shows a course of the creeping torque as a function of the brake pressure, with a low creeping torque when closing and an increased creeping torque when opening the brake.
In Figur 1 wird das erfindungsgemäße Verfahren an Hand eines Flussdiagramms dargestellt.The method according to the invention is illustrated in FIG. 1 using a flow chart.
Zu Beginn des Verfahrens wird geprüft, ob der Bremsdruck p_Brems_neu derAt the beginning of the process, it is checked whether the brake pressure p_Brems_neu der
Fahrzeugbremse kleiner als ein Schwellenwert p_Brems_Schwelle des Bremsdruckes ist. Wenn nein wird das Verfahren beendet, ohne dass ein Aufbau des Kriechmomentes erfolgt. Wenn ja wird z. B. in Abhängigkeit des sinkenden Bremsdruckes ein Kriechmoment aufgebaut, damit das Fahrzeug an einer Steigung beim Lösen der Bremse nicht zurückrollt.Vehicle brake is less than a threshold value p_Brems_Schwelle the brake pressure. If not, the process is ended without the creep torque building up. If so, z. B. builds up a creep torque depending on the falling brake pressure so that the vehicle does not roll back on a slope when releasing the brake.
In den Figuren 2 bis 4 sind verschiedene mögliche funktionale Zusammenhänge zwischen dem Bremsdruck p_Brems_neu und dem Kriechmoment gezeigt, wobei der Verlauf des Kriechmomentes beim Öffnen der Bremse mit einer durchgezogenen Linie und der Verlauf des Kriechmomentes beim Schließen der Bremse mit einer punktierten Linie gekennzeichnet ist. In Figur 2 wird das Kriechmoment rampenförmig bei sinkendem Bremsdruck p_Brems_neu zum Öffnen der Bremse aufgebaut. In Figur 3 erfolgt der Kriechmomentenaufbau sprungartig. Schließlich wird in Figur 4 ein Verlauf des Kriechmomentes dargestellt, wobei beim Schließen der Bremse ein geringesFIGS. 2 to 4 show various possible functional relationships between the brake pressure p_Brems_neu and the creeping torque, the course of the creeping torque when the brake is opened being indicated by a solid line and the course of the creeping torque when the brake is applied is indicated by a dotted line. In FIG. 2, the creep torque is built up in a ramp shape when the brake pressure p_Brems_neu drops to open the brake. In FIG. 3, the creeping moment builds up suddenly. Finally, a curve of the creep torque is shown in FIG. 4, a slight one when the brake is applied
Kriechmoment und beim Öffnen der Bremse ein erhöhtes Kriechmoment vorgesehen ist.Creep torque and an increased creep torque is provided when the brake is opened.
Es ist jedoch anzumerken, dass die in den Figuren 2 bis 4 gezeigten Zusammenhänge nur gelten, wenn die Bremsdruckschwelle p_Brems_Schwelle überschritten wird. Anderenfalls gelten für das Öffnen der Bremse auch die punktierten Linien, welche normalerweise den Verlauf des Kriechmomentes beim Schließen der Bremse kennzeichnen.However, it should be noted that the relationships shown in FIGS. 2 to 4 only apply if the brake pressure threshold p_Brems_Schwelle is exceeded. Otherwise, the dotted lines also apply to the opening of the brake, which normally characterize the course of the creep torque when the brake is closed.
Die mit der Anmeldung eingereichten Patentansprüche sind Formulierungsvorschläge ohne Präjudiz für die Erzielung weitergehenden Patentschutzes. Die Anmelderin behält sich vor, noch weitere, bisher nur in der Beschreibung und/oder Zeichnungen offenbarte Merkmalskombinationen zu beanspruchen.The patent claims submitted with the application are proposals for formulation without prejudice for the achievement of further patent protection. The applicant reserves the right to claim further combinations of features previously only disclosed in the description and / or drawings.
In Unteransprüchen verwendete Rückbeziehungen weisen auf die weitere Ausbildung des Gegenstandes des Hauptanspruches durch die Merkmale des jeweiligen Unteranspruches hin; sie sind nicht als ein Verzicht auf die Erzielung eines selbständigen, gegenständlichen Schutzes für die Merkmalskombinationen der rückbezogenen Unteransprüche zu verstehen.Back-references used in subclaims indicate the further development of the subject matter of the main claim by the features of the respective subclaim; they are not to be understood as a waiver of the achievement of independent, objective protection for the combinations of features of the related subclaims.
Da die Gegenstände der Unteransprüche im Hinblick auf den Stand der Technik amSince the subjects of the subclaims with regard to the prior art on
Prioritätstag eigene und unabhängige Erfindungen bilden können, behält die Anmelderin sich vor, sie zum Gegenstand unabhängiger Ansprüche oder Teilungserklärungen zu machen. Sie können weiterhin auch selbständige Erfindungen enthalten, die eine von den Gegenständen der vorhergehenden Unteransprüche unabhängige Gestaltung aufweisen.The applicant reserves the right to make its own and independent inventions on the priority date to make them the subject of independent claims or declarations of division. They can furthermore also contain independent inventions which have a design which is independent of the objects of the preceding subclaims.
Die Ausführungsbeispiele sind nicht als Einschränkung der Erfindung zu verstehen. Vielmehr sind im Rahmen der vorliegenden Offenbarung zahlreiche Abänderungen und Modifikationen möglich, insbesondere solche Varianten, Elemente und Kombinationen und/oder Materialien, die zum Beispiel durch Kombination oder Abwandlung von einzelnen in Verbindung mit den in der allgemeinen Beschreibung und Ausführungsformen sowie den Ansprüchen beschriebenen und in den Zeichnungen enthaltenen Merkmalen bzw. Elementen oder Verfahrensschritten für den Fachmann im Hinblick auf die Lösung der Aufgabe entnehmbar sind und durch kombinierbare Merkmale zu einem neuen Gegenstand oder zu neuen Verfahrensschritten bzw. Verfahrensschrittfolgen führen, auch soweit sie Herstell-, Prüf- und Arbeitsverfahren betreffen. The exemplary embodiments are not to be understood as a restriction of the invention. Rather, there are numerous changes and changes within the scope of the present disclosure Modifications possible, in particular those variants, elements and combinations and / or materials, for example by combining or modifying individual ones in conjunction with the features or elements or process steps described in the general description and embodiments and the claims and contained in the drawings the skilled person can be found with regard to the solution of the task and, by means of combinable features, lead to a new object or to new process steps or process step sequences, also insofar as they relate to manufacturing, testing and working processes.

Claims

Patentansprüche claims
1. Verfahren zum Ansteuern eines Kriechmomentes an einer Kupplung bei einem automatisierten Getriebe, dadurch gekennzeichnet, dass der Zeitpunkt des Aufbaus und/oder der Verlauf des Kriechmoments in Abhängigkeit von zumindest einem1. A method for controlling a creep torque on a clutch in an automated transmission, characterized in that the time of construction and / or the course of the creep torque as a function of at least one
Betriebsparameter des Fahrzeuges bestimmt wird.Operating parameters of the vehicle is determined.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass als Betriebsparameter der Bremsdruck (p_Brems_neu) der Fahrzeugbremse verwendet wird.2. The method according to claim 1, characterized in that the brake pressure (p_Brems_neu) of the vehicle brake is used as the operating parameter.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass das Kriechmoment aufgebaut wird, wenn der Bremsdruck (p_Brems_neu) von oben kommend einen definierten Schwellenwert (p_Brems_Schwelle) unterschreitet.3. The method according to claim 2, characterized in that the creep torque is built up when the brake pressure (p_Brems_neu) coming from above falls below a defined threshold value (p_Brems_Schwelle).
4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Kriechmoment in funktionaler Abhängigkeit von dem Bremsdruck (p_Brems_neu) aufgebaut wird.4. The method according to claim 2 or 3, characterized in that the creep torque is built up as a function of the brake pressure (p_Brems_neu).
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass bei abnehmendem Bremsdruck (p_Brems_neu) ein stetig steigendes Kriechmoment aufgebaut wird, bis ein maximales zulässiges Kriechmoment an der Kupplung anliegt.5. The method according to claim 4, characterized in that with decreasing brake pressure (p_Brems_neu) a steadily increasing creep torque is built up until a maximum permissible creep torque is applied to the clutch.
6. Verfahren nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass das Kriechmoment linear, progressiv, degressiv oder stufenweise mit abnehmendem Bremsdruck (p_Brems_neu) aufgebaut wird.6. The method according to any one of claims 2 to 5, characterized in that the creep torque is built up linearly, progressively, degressively or gradually with decreasing brake pressure (p_Brems_neu).
7. Getriebe für ein Fahrzeug, insbesondere zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Einrichtung zum Ansteuern eines Kriechmomentes in Abhängigkeit zumindest eines Betriebsparameters vorgesehen ist.7. Gearbox for a vehicle, in particular for performing the method according to one of claims 1 to 6, characterized in that a device for controlling a creep torque is provided as a function of at least one operating parameter.
8. Getriebe nach Anspruch 7, dadurch gekennzeichnet, dass die Einrichtung zumindest einen Sensor zum Erkennen des Betriebsparameters aufweist. 8. Transmission according to claim 7, characterized in that the device has at least one sensor for detecting the operating parameter.
PCT/DE2003/000652 2002-03-07 2003-02-28 Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle WO2003074314A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE10308699A DE10308699A1 (en) 2002-03-07 2003-02-28 Creeping torque control method for clutch of automobile automatic transmission controls creeping torque timing and/or characteristic dependent on vehicle operating parameter
PCT/DE2003/000652 WO2003074314A2 (en) 2002-03-07 2003-02-28 Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle
DE10390838T DE10390838D2 (en) 2002-03-07 2003-02-28 Transmission and method for driving a creep torque in an automatic transmission of a vehicle
AU2003215516A AU2003215516A1 (en) 2002-03-07 2003-02-28 Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle
FR0302754A FR2840660B1 (en) 2002-03-07 2003-03-06 TRANSMISSION AND METHOD FOR CONTROLLING A RAMPING WORKING TORQUE APPLYING TO AUTOMATIC TRANSMISSION OF A VEHICLE

Applications Claiming Priority (16)

Application Number Priority Date Filing Date Title
DE10209917.0 2002-03-07
DE10209917 2002-03-07
DE10308689A DE10308689A1 (en) 2002-03-07 2003-02-28 Gear changing method for dual-clutch gearbox uses torque control of clutches dependent on gearbox loading and/or gear changing mode
DE10308700.1A DE10308700B4 (en) 2002-03-07 2003-02-28 A method of performing an upshift from an initial gear to a target gear in the dual-clutch transmission of a vehicle
DE10308712.5A DE10308712B4 (en) 2002-03-07 2003-02-28 Vehicle with a drive train and method for controlling the drive train of a vehicle
DE10308713.3A DE10308713B4 (en) 2002-03-07 2003-02-28 A dual clutch transmission and method for controlling and / or regulating a dual clutch transmission in a crossover circuit
DE10308692A DE10308692A1 (en) 2002-03-07 2003-02-28 Gear shifting method for dual-clutch gear shift transmission for automobile has active clutch opened until slip limit is reached with control of torque delivered by engine
DE10308748A DE10308748A1 (en) 2002-03-07 2003-02-28 Process and device for driving a motor vehicle controls a parallel switching gear with a double coupling in the drive train
DE10308697A DE10308697A1 (en) 2002-03-07 2003-02-28 Gear changing method for dual-clutch gearbox provides downwards gear changing dependent on gear changing mode and/or vehicle parameters
DE10308698A DE10308698A1 (en) 2002-03-07 2003-02-28 Starting strategy for dual-clutch gearbox for automobile has drive switched from starting clutch to second clutch upon detection of threshold clutch temperature
DE10308690A DE10308690A1 (en) 2002-03-07 2003-02-28 Gear changing strategy for automobile dual-clutch gearbox has input shaft of inactive parallel drive train increased during gear pre-selection
DE10308719A DE10308719A1 (en) 2002-03-07 2003-02-28 Position adjustment method for motion transmission between clutch actuator and spring-loaded clutch
DE10308716A DE10308716A1 (en) 2002-03-07 2003-02-28 Clutch characteristic adaptation method for dual-clutch gearbox for automobile provides zero point adjustment for displacement measurement of clutch actuators during driving
DE10308714A DE10308714A1 (en) 2002-03-07 2003-02-28 Clutch control method for automobile dual-clutch gearbox has clutches controlled for slip regulation during overlapping gear shift
DE10308691A DE10308691A1 (en) 2002-03-07 2003-02-28 Gear selection method for dual-clutch system for parallel switched gearbox provides pre-selection of gear for inactive parallel drive train dependent on gear selected for active parallel drive train
PCT/DE2003/000652 WO2003074314A2 (en) 2002-03-07 2003-02-28 Transmission and method for controlling a creeping torque of an automatic transmission of a vehicle

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DE (2) DE10390838D2 (en)
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JP2005344859A (en) * 2004-06-03 2005-12-15 Nissan Motor Co Ltd Starting friction element control device of vehicle
JP4872235B2 (en) * 2005-04-28 2012-02-08 日産自動車株式会社 Shift control device for multi-stage automatic transmission
DE102005021720A1 (en) 2005-05-11 2006-11-16 Zf Friedrichshafen Ag Method and device for controlling a standstill circuit of an automatic transmission
DE102006042356A1 (en) * 2006-09-08 2008-03-27 Zf Friedrichshafen Ag Method for detecting the application point of a clutch, in particular a wet starting clutch
DE102006042357A1 (en) * 2006-09-08 2008-03-27 Zf Friedrichshafen Ag Method for detecting the application point of a clutch, in particular a wet starting clutch
FR2927040B1 (en) * 2008-02-05 2010-04-16 Renault Sas METHOD FOR OPERATING A STARTING ASSISTANCE SYSTEM FOR A MOTOR VEHICLE ON THE SIDE

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WO2003074314A3 (en) 2003-11-13
DE10308699A1 (en) 2003-10-09
FR2840660A1 (en) 2003-12-12
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AU2003215516A1 (en) 2003-09-16
FR2840660B1 (en) 2007-04-20

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