Clutch control device and μ correction coefficient calculating method

A clutch control device for a clutch which connects and disconnects a rotational driving force transmitted to a staged transmission from an engine of a vehicle, the clutch control device comprising:

• clutch control means for controlling a control amount of the clutch;
• engine-speed detection means for detecting a speed of the engine;
• shifting-condition detection means for detecting a shifting condition of the transmission;
• rate-of-change-of-engine-speed-during-shifting calculation means for detecting a rate-of-change of the engine speed during shifting of the transmission;
• actual-rotational-difference absorption-torque calculation means for calculating an actual-rotational-difference absorption torque used for a rotational change during the shifting by applying the rate-of-change of the engine speed into the calculation;
• engine-torque calculation means for calculating an engine torque which the engine generates, by applying at least a throttle opening and the engine speed into the calculation;
• and
• frictional-correction-coefficient calculation means for calculating a correction coefficient of a friction coefficient of the clutch,
• wherein the frictional-correction-coefficient calculation means calculates an actual clutch capacity from a sum of an average value of actual-rotational-difference absorption-torques during shifting and an average value of engine torques calculated during the shifting, and further calculates a frictional correction coefficient on the basis of a ratio of the actual clutch capacity and a demanded clutch capacity calculated from a condition of the vehicle;
• and
• the clutch control means controls the clutch on the basis of the frictional correction coefficient.