CREEP CONTROLLER FOR CONTINUOUSLY VARIABLE TRANSMISSION

摘要

PURPOSE:To make improvements in drivability by controlling a clutch pressure so as to make a creep at time of backward shift operation larger than that by a slip of a hydraulic clutch in a hold mode at time of forward shift operation. CONSTITUTION:A control unit reads a creep desired value PCC out of a map 200 or 202 according to engine speed NE at time of the forward or backward shift of a hold mode, and performs the specified control operation, thereby controlling a clutch pressure. Since the map 202 in the hold mode at time of the backward shift operation is set to be larger than the map 200 at time of the forward shift of its target creep value by a lip of a hydraulic clutch, if a creep at time of forward movement of a vehicle is reduced, it utilizes a large creep at time of backward movement, thereby making the vehicle possible to go back without operating an accelerator pedal. Thus, drivability at time of the backward shift operation is improvable without entailing any damage to the drivability at time of forward shift operation.