EP2350498A1 - Method for engaging a torque converter lock-up clutch in a power transmission of a mobile machine - Google Patents

Method for engaging a torque converter lock-up clutch in a power transmission of a mobile machine

Info

Publication number
EP2350498A1
EP2350498A1 EP09783530A EP09783530A EP2350498A1 EP 2350498 A1 EP2350498 A1 EP 2350498A1 EP 09783530 A EP09783530 A EP 09783530A EP 09783530 A EP09783530 A EP 09783530A EP 2350498 A1 EP2350498 A1 EP 2350498A1
Authority
EP
European Patent Office
Prior art keywords
engine
transmission
clutch
torque
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09783530A
Other languages
German (de)
French (fr)
Inventor
Hans Höfler
Thomas Kurz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP2350498A1 publication Critical patent/EP2350498A1/en
Withdrawn legal-status Critical Current

Links

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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • F16H2059/147—Transmission input torque, e.g. measured or estimated engine torque
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • 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
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/14—Inputs being a function of torque or torque demand
    • F16H59/141—Inputs being a function of torque or torque demand of rate of change of torque or torque demand
    • 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
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor

Definitions

  • the present invention relates to a method for closing bridging couplings in a load-slide transmission of a work machine according to the preamble of patent claim 1.
  • an open converter lock-up clutch is actuated in the closing direction when the turbine speed exceeds a threshold value at which the turbine torque is equal when the lockup clutch is closed and the lockup clutch is open.
  • a closed lockup clutch is actuated in the opening direction when the turbine speed falls below a threshold value at which the turbine torque is the same when the lockup clutch is open and open.
  • the present invention has for its object to provide a method for closing the Wandlerüberbrückungskuppiu ⁇ g in a powershift transmission of a work machine, by its implementation, the shift quality of the circuits of the lockup clutch, especially in the partial load range is improved.
  • the acceleration and thus the acceleration shock when switching the WandlerüberbrückungskuppSung should be largely reduced or avoided. Further embodiments and advantages of the invention will become apparent from the dependent claims.
  • the snubber clutch is passed through an engine guide during the closing process by increasing the engine torque, i. the gradient of
  • wsra before a: clutch determines the upcoming engine or Turbine ⁇ mome ⁇ t, wherein depending on the determined engine or turbine torque of the gradient of the engine torque during the circuit and optionally a defined time after the circuit via the transmission control is performed such that an acceleration of the vehicle and thus an acceleration shock when switching is reduced or avoided.
  • the turbine torque is determined via the converter characteristic applied in transmission control.
  • the guidance takes place in dependence on the circuit of the torque or turbine torque on the basis of an in
  • the gradient of the engine torque can, according to, a development of
  • the second characteristic agrees with the first characteristic or that the first characteristic is used to guide the gradient of the engine torque after the circuit.

Abstract

In the proposed method for engaging the torque converter lock-up clutch in a power transmission of a mobile machine, the available engine moment or turbine moment is determined prior to shifting the lock-up clutch, and the gradient of the engine moment is controlled during the shifting process and, optionally, for a defined period of time following the shifting process by means of the transmission controller in such a way that an acceleration of the vehicle and thus a jerk is reduced or prevented during the shifting process.

Description

Verfahren zum Schließen der Wandlerüberbrückungskupplung In einem Lastschaltgetriebe einer Arbeitsmaschine Method of closing the lockup clutch In a power shift transmission of a work machine
Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Schließen srüberbrückungskuppluπg in einem Lastschaitgetriebe einer Arbeitsmaschine gemäß dem Oberbegriff des Patentanspruchs 1.The present invention relates to a method for closing bridging couplings in a load-slide transmission of a work machine according to the preamble of patent claim 1.
Zur Reduzierung der Verlustleistung in einem hydrodynamischen Drehmomentwand ier wird nach dem Stand der Technik bei Lastschaltgetrieben eine Wandlerüberbrückungskupplung eingesetzt, durch die das Turbineπrad des Wandlers mit dem Pumpenrad verbindbar ist. Bei geschlossener Wandlerüberbrückungskupplung entsteht somit eine verlustlose Antriebsverbiπdung zwischen dem Antriebsmotor und dem Getriebe des Fahrzeugs,To reduce the power loss in a hydrodynamic torque wall ier a converter lockup clutch is used in the prior art in powershift transmissions, through which the Turbineπrad the converter is connected to the impeller. When the converter lock-up clutch is closed, a lossless drive connection thus arises between the drive motor and the transmission of the vehicle,
Bei bisher bekannten Anwendungen bei Arbeitsmaschinen, wie beispielsweise bei Dumper, Grader und Kranfahrzeugen erfolgt das Schließen und Öffnen der Wandlerüberbrückungskupplung in Abhängigkeit der Turbinen» drehzah! unter Berücksichtigung der Wandlerkenniinie, Hierbei wird eine offene Wandlerüberbrückungskupplung im Schließsinne betätigt, wenn die Turbinen- drehzahl einen Schwellenwert überschreitet, bei dem das Turbinendrehmoment bei geschiossener und offener Wandlerüberbrückungskupplung gleich groß ist. Nach dem Stand der Technik wird eine geschlossene Wandlerüberbrückungskupplung im Öffnungssinne betätigt, wenn die Turbinendrehzahl einen Schwellenwert unterschreitet, bei dem das Turbinendrehmoment bei geschlossener und offener Wandlerüberbrückungskupplung gleich groß ist. Diese Schaltpunkte werden durch die Drehzahldifferenz zwischen der Turbine und der Pumpe ermittelt.In hitherto known applications for working machines, such as, for example, dumpers, graders and crane vehicles, the closing and opening of the lockup clutch takes place in dependence on the turbines. Taking into account the converter characteristic, an open converter lock-up clutch is actuated in the closing direction when the turbine speed exceeds a threshold value at which the turbine torque is equal when the lockup clutch is closed and the lockup clutch is open. According to the prior art, a closed lockup clutch is actuated in the opening direction when the turbine speed falls below a threshold value at which the turbine torque is the same when the lockup clutch is open and open. These switching points are determined by the speed difference between the turbine and the pump.
Diese Vorgehensweise resultiert in den unteren Gängen darin, dass bei Schaltungen der Wandlerüberbrückungskupplung im Teillastbereich durch einen von der Motordrückung während der Schaltung verursachten Anstieg des Motormomeπtes ein Beschleunigen des Fahrzeuges verursacht wird, welches in der Regel vom Fahrer ais unangenehmer Schaltstod empfunden wird.This procedure results in the lower gears in that in circuits of the lockup clutch in the partial load range through causing an increase in Motormomeπtes caused by the engine retardation during the circuit, an acceleration of the vehicle, which is usually perceived by the driver as an unpleasant Schaltstod.
Aus der DE 37 12 498 C2 ist ein Verfahren zur Integralregelung eines Motors und eines Automatgetriebes, zwischen denen ein Drehmomentwandfer angeordnet ist, der eine Überbrückungskuppiung aufweist, welche in mindestens einer Schaltstufe des Automatgetriebes eiπrückbar ist, im Rahmen dessen das Motordrehmoment während eines Schaltvorgangs geregelt wird, umFrom DE 37 12 498 C2 a method for integral control of a motor and an automatic transmission between which a Drehmomentwandfer is arranged, which has a Brückungskuppiung which is eiπrückbar in at least one switching stage of the automatic transmission, in the context of which the engine torque is controlled during a switching operation , around
Bei dem bekannten Verfahren wird die Regelung des Motordrehmoments beim Hochschalten in Abhängigkeit von dem ermittelten Zustand der Überbrückungskuppiung eingeleitet, wobei im ausgerückten Zustand der Über¬In the known method, the control of the engine torque during upshifting is initiated as a function of the determined state of the lock-up clutch, wherein in the disengaged state the Über¬
wird, wenn die gegenwärtig erfasste Motordrehzah! unter die vorhergehend erfasste Motordrehzahl absinkt und wobei im eingerückten Zustand der Überbrückungskuppiung die Regelung des Motordrehmoments dann eingeleitetwhen the currently detected engine speed! falls below the previously detected engine speed and wherein the control of the engine torque then initiated in the engaged state of the lock-up
der sich durch Multiplikation der Abtriebswelleπdrehzahl mit dem Übersetzungsverhältnis der zuvor eingestellten Schaltstufa des Automatgetriebesby multiplying the Abtriebswelleπdrehzahl with the gear ratio of the previously set Schaltstufa the automatic transmission
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Schließen der Wandlerüberbrückungskuppiuπg in einem Lastschaltgetriebe einer Arbeitsmaschine anzugeben, durch dessen Durchführung die Schaltqualität der Schaltungen der Wandlerüberbrückungskupplung, insbesondere im Teillastbereich verbessert wird. Hierbei soll die Beschleunigung und somit der Beschleunigungsstoß beim Schalten der WandlerüberbrückungskuppSung weitgehend reduziert bzw. vermieden werden. Weitere erfindungsgemäße Ausgestaltungen und Vorteile gehen aus den Unteransprüchen hervor.The present invention has for its object to provide a method for closing the Wandlerüberbrückungskuppiuπg in a powershift transmission of a work machine, by its implementation, the shift quality of the circuits of the lockup clutch, especially in the partial load range is improved. Here, the acceleration and thus the acceleration shock when switching the WandlerüberbrückungskuppSung should be largely reduced or avoided. Further embodiments and advantages of the invention will become apparent from the dependent claims.
zum bchi iung vorgeschlagen, sn brückuπgskupplung durch eine Motorführung während des Schließvorgangs lusst wird, indem der Anstieg des Motormomentes d.h. der Gradient desFor the sake of brevity, the snubber clutch is passed through an engine guide during the closing process by increasing the engine torque, i. the gradient of
zu diesem Zweck wsra vor einer : kupplung das anstehende Motor- oder Turbineπmomeπt ermittelt, wobei in Abhängigkeit des ermittelten Motor- oder Turbinenmomentes der Gradient des Motormomentes während der Schaltung und optional eine definierte Zeit nach der Schaltung über die Getriebesteuerung derart geführt wird, dass eine Beschleunigung des Fahrzeugs und somit ein Beschleunigungsstoß beim Schalten reduziert bzw. vermieden wird.For this purpose, wsra before a: clutch determines the upcoming engine or Turbineπmomeπt, wherein depending on the determined engine or turbine torque of the gradient of the engine torque during the circuit and optionally a defined time after the circuit via the transmission control is performed such that an acceleration of the vehicle and thus an acceleration shock when switching is reduced or avoided.
der Motorsteuerung erfasst und über das CAN (Controller Area Network) Getriebesteuerung übermittelt; das Turbinenmoment wird über das in Getriebesteuerung angelegte Wandler- kennfefd ermittelt.recorded the engine control and transmitted via the CAN (Controller Area Network) transmission control; The turbine torque is determined via the converter characteristic applied in transmission control.
Vorzugsweise erfolgt die Führun während der Schaltung in Abhäng vor der Schaltung der Waπdler- oder Turbinenmomentes anhand einer inPreferably, during the shifting, the guidance takes place in dependence on the circuit of the torque or turbine torque on the basis of an in
Der Gradient des Motormomentes kann gemäß, einer Weiterbildung derThe gradient of the engine torque can, according to, a development of
eine definierte Zeit geführt werden, wobei dies vorzugsweise über eine in der Getriebesteueruπg abgelegte zweiten Kennlinie erfolgt. Hierbei kann vorgesehen sein, dass das Moment rampenförmig an das der Gaspedafsteüung ent-a defined time, this preferably via a in the Getriebesteueruπg deposited second characteristic is carried out. In this case, it may be provided that the torque ramps up to that of the accelerator opening.
Ferner kann vorgesehen sein, dass die zweite Kennlmie mit der ersten Kennlinie übereinstimmt bzw. dass zur Führung des Gradienten des Motormomentes nach der Schaltung die erste Kennlinie verwendet wird,Furthermore, it can be provided that the second characteristic agrees with the first characteristic or that the first characteristic is used to guide the gradient of the engine torque after the circuit.
Durch die erfindungsgemäße Konzeption kann während des Schließens der Wandlerüberbrückungskupplung der Anstieg des Motormomentes, Insbesondere bei Teiflastschaltungen reduziert bzw. vermieden werden, wodurch der Beschleunigungsstoß beim Schalten reduziert wird. Due to the conception according to the invention, during the closing of the lockup clutch, the increase of the engine torque, in particular in partial load shifting, can be reduced or avoided, whereby the acceleration shock during shifting is reduced.

Claims

Patentansprüche claims
1. Verfahren zum Schließen derWandlerüberbrückungskuppiung in Lastschaltgetriebe einer Arbeitsmaschine, dadurch geken nzeichnet, dass vor einer Schattung der Waπdlerüberbrückungskuppluπg das anstehende Motor- oder Turbinenmoment ermittelt wird und in Abhängigkeit des ermittelten Motor- oder Turbinenmomentes der Gradient des Motormomentes während der Schaltung und optional eine definierte Zeit nach der Schaltung über die Getriebesteuerung derart geführt wird, dass eine Beschleunigung des Fahrzeugs und somit ein Beschleunigungsstoß beim Schalten reduziert bzw. vermieden wird.1. A method for closing the converter bridging in power shift gearbox of a working machine, characterized Porsche Style nken signifies that before shading the Waπdlerüberbrückungskuppluπg the upcoming engine or turbine torque and depending on the determined engine or turbine torque of the gradient of the engine torque during the circuit and optionally a defined time is performed after the circuit via the transmission control such that an acceleration of the vehicle and thus an acceleration shock when switching is reduced or avoided.
2. Verfahren zum Schließen der Wandlerüberbrückungskuppfung in einem Lastschaltgetriebe einer Arbeltsmaschine, nach Anspruch 1, dadurch gekennze ich net, dass das Motormoment von der Motorsteuerung erfasst und über das CAN an die Getriebesteuerung übermϊtteit wird, wobei das Turbinenrnoment über das in der Getriebesteuerung angelegte Wandlerkennfeld ermittelt wird.2. A method for closing the lockup lockup in a powershift transmission Arbeltsmaschine according to claim 1, characterized i net, that the engine torque is detected by the engine control and übermϊtteit on the CAN to the transmission control, wherein the turbine torque determined by the applied in the transmission control transducer map becomes.
3. Verfahren zum Schließen der Wandlerüberbrückungskuppiung in einem Lastschaltgetriebe einer Arbeitsmaschlne, nach Anspruch 1 oder 2, dadurch gekenn zeichnet, dass die Führung des Gradienten des Motormomentes während der Schaltung in Abhängigkeit des vor der Schaltung der Wandlerüberbrückungskupplung anstehenden Motor- oder Turbinenmo- meπtes anhand einer in der Getriebesteuerung abgelegten ersten Kenniinie3. A method for closing the lockup clutch in a powershift transmission Arbeitsmaschlne, according to claim 1 or 2, characterized in that the leadership of the gradient of the engine torque during the circuit depending on the pending before the circuit of the lockup clutch engine or Turbinenmo- meteπtes based on a stored in the transmission control first Kenniinie
einer Arbeitsmaschine, nach Anspruch 1, 2 oder 3, geken n zeich net, Motormomeπtes für eine definierte Zeit nach der Schaltung über die Getriebe-a working machine according to claim 1, 2 or 3, characterized Motormomeπtes for a defined time after switching over the transmission
einem Lastschaitgetriebe einer Arbe geken n zeich net, dass Motormoment rampenförmig an das der Gaspedalsteliung entsprechende leführt wird. A load shifter of an arm will show that engine torque is ramped to that corresponding to the accelerator pedal position.
EP09783530A 2008-10-23 2009-09-29 Method for engaging a torque converter lock-up clutch in a power transmission of a mobile machine Withdrawn EP2350498A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008043109A DE102008043109A1 (en) 2008-10-23 2008-10-23 A method of closing the lockup clutch in a power shift transmission of a work machine
PCT/EP2009/062591 WO2010046203A1 (en) 2008-10-23 2009-09-29 Method for engaging a torque converter lock-up clutch in a power transmission of a mobile machine

Publications (1)

Publication Number Publication Date
EP2350498A1 true EP2350498A1 (en) 2011-08-03

Family

ID=41323528

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09783530A Withdrawn EP2350498A1 (en) 2008-10-23 2009-09-29 Method for engaging a torque converter lock-up clutch in a power transmission of a mobile machine

Country Status (5)

Country Link
US (1) US20110196588A1 (en)
EP (1) EP2350498A1 (en)
CN (1) CN102203469A (en)
DE (1) DE102008043109A1 (en)
WO (1) WO2010046203A1 (en)

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Also Published As

Publication number Publication date
DE102008043109A1 (en) 2010-04-29
WO2010046203A1 (en) 2010-04-29
CN102203469A (en) 2011-09-28
US20110196588A1 (en) 2011-08-11

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