Patent ID: 6719664
Filing Date: 2004-04-13
Classification: B60K,B60W,F16H,Y10T

Abstract:
A control apparatus of a lock-up clutch for a vehicle having a hydraulic power transmission with a lock-up clutch which directly connects between an engine and an automatic transmission, the control apparatus comprising:a fuel-cut control portion stopping supplying a fuel to the engine at a time when the vehicle is decelerated, and restarting supplying the fuel to the engine at a time of judging that a rotational speed of the engine becomes a predetermined fuel-cut end rotational speed; a slip control portion which executes a slip control of the lock-up clutch at the time when the vehicle is decelerated; and a shift transmission control portion which performs a down shift of the automatic transmission at a time of judging that at least any one of the rotational speed of the engine and an input shaft rotational speed of the automatic transmission becomes a down shift rotational speed which is higher than the fuel-cut end rotational speed by a predetermined amount, during an execution of the slip control by the slip control portion.