| 摘要 |
A lock-up clutch control device which controls a lock-up clutch ( 6 ) provided in a torque converter ( 5 ) interposed between an engine ( 3 ) and a transmission ( 4 ) used with a vehicle, is disclosed. The lock-up clutch control device has a differential pressure generating device ( 7,8 ), a vehicle speed sensor ( 13 ), a throttle valve opening sensor ( 14 ), an transmission input shaft rotation speed sensor ( 16 ), engine torque detection means ( 2 ), and a controller ( 1 ). The controller ( 1 ) determines, based on the detected vehicle speed (VSP) and the detected throttle valve opening (TVO), whether or not a control region of a torque converter is a converter region wherein control is performed to disengage the lock-up clutch. When the control region of the torque converter is not the converter region, the controller ( 1 ) determines whether or not the control region of the torque converter is a slip control region wherein control is performed to make the lock-up clutch slip, based on the detected input shaft rotation speed (Npri) of the transmission and the detected engine torque (Te). When the control region of the torque converter is the slip control region, the controller commands the differential pressure generating device ( 7,8 ) to cause a slip of the lock-up clutch ( 6 ).
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