CLUTCH CHARACTERISTIC ADAPTION METHOD FOR AUTOMATIC DUAL CLUTCH TRANSMISSION
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Abstract
A method for clutch characteristic curve adaptation of an automatic dual-clutch transmission which comprises two sub-gearboxes each with an input shaft connected, via a friction clutch, to the drive shaft of a motor and several gears that are shifted via a friction-synchronized gear clutch. A value of the current touch point of the friction clutch can be determined with the motor running and the gears disengaged in a load-free sub-gearbox. The method includes the steps of starting synchronization of a gear clutch with a defined force of a regulator. Waiting until the gear clutch is synchronized. Engaging the friction clutch of the until the gear clutch is synchronizes. Determination the current touch point from the current synchronous torque of the gear clutch and the current regulating parameter of the associated clutch regulator. Then, adapting the clutch characteristic curve of the friction clutch in view of the current touch point.
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Citations
50 Claims
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1-25. -25. (canceled)
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26. A method for clutch characteristic curve adaptation of an automatic dual-clutch transmission of a vehicle which comprises two sub-gearboxes each comprising an input shaft (3, 4) connected, via a friction clutch (K1, K2), to a drive shaft (2) of a drive motor (M) and a plurality of gears (G1-G6, R) that are shiftable via a friction-synchronized gear clutch (S1-S4), whereby a current value of a touch point of an associated friction clutch (K1, K2) is determined in conjunction with a partial engagement of the associated friction clutch (K1, K2) and acquisition of relevant operating parameters with the drive motor (M) operating and the plurality of gears (G1-G6, R) disengaged in a load-free sub-gearbox, the method comprising the steps of:
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starting of the synchronous point of a gear clutch (S1, S3;
S2, S4) of the load-free sub-gearbox with a defined regulating force of an associated gear regulator (pGK=pSync)waiting until synchronization is attained for the gear clutch being synchronized (nGE=nSync); successively engaging the associated friction clutch (K1;
K2) of the same sub-gearbox until cessation of the synchronization at the gear clutch being synchronized is determined (nGE≠
nSync);ascertaining the current touch point (xTP, pTP) of the associated friction clutch from a current synchronous torque (MSync) of the gear clutch being synchronized and a current regulating parameter (xK, pK) of the associated clutch regulator; and adapting a clutch characteristic curve of the associated friction clutch (K1, K2) with the current touch point (xTP, Ptp). - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification