Method for controlling the torque converter clutch (tcc) pressure during coast downshift events
AssigneeGM Global Technology Operations LLC
InventorVincent HOLTZ
Life of this patent
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Abstract
A method is provided for controlling the torque converter clutch (TCC) pressure during coast downshift events. In order to provide a method for controlling the TCC pressure during coast downshift events, it is proposed that coast pressure compensation is computed at the beginning of the shift and that the coast pressure compensation is applied on the TCC pressure during the coast downshift. With such pressure compensation it is possible to stay in regulation mode which improves both shift quality and fuel consumption.
Claims8
A method for controlling a torque converter clutch (TCC) pressure during a coast downshift event, comprising the steps of:
- computing a coast pressure compensation at a beginning of a shift;
- and
- applying the coast pressure compensation on the TCC pressure during the coast downshift event.
Dependencies are inferred from the claim text.