Provided is a lock-up clutch control system for a vehicle, in which, when the accelerator pedal is released in a slip engagement mode, lock-up re-engagement with reduced engagement shock is performed, thereby improving fuel economy. A torque converter (4) having a lock-up clutch (3) is disposed between an engine (1) and a continuously variable transmission (6). The vehicle is provided with a coast lock-up control unit configured to bring the engine (1) in a fuel cut-off state when the accelerator pedal is released in a slip engagement mode in which a differential rotation is present in the lock-up clutch (3) with the accelerator pedal being depressed. Upon accelerator fool release operation, the coast lock-up control unit performs an engine torque control to synchronize engine rotation speed and turbine rotational speed, re-engages the lock-up clutch (3) in a rotation synchronization state, and, after the re-engagement, and performs fuel cut-off
LOCK-UP CLUTCH CONTROL DEVICE FOR VEHICLE
LOCK-UP-KUPPLUNGSSTEUERUNGSVORRICHTUNG FÜR EIN FAHRZEUG
DISPOSITIF DE COMMANDE D'EMBRAYAGE DE VERROUILLAGE POUR VÉHICULE
2018-11-28
Patent
Electronic Resource
English