A clutch control device includes an ECU that controls a clutch actuator, the ECU sets a control target value of the clutch capacity according to the operation amount detected by the clutch operation amount sensor, and executes feedback control so that the control parameter which is detected by the control parameter sensor approaches the control target value, and changes a method of the feedback control when the control parameter reaches a predetermined control state change determination value during the feedback control.

A method for controlling an engagement of a lock-up clutch (LUC) of a torque converter of a machine is disclosed. The method includes detecting a pedal tap of a pedal, wherein the pedal tap is detected when the pedal is depressed from a position corresponding to a pedal displacement less than a first threshold displacement to a position corresponding to a pedal displacement greater than a second threshold displacement, and then released to a position corresponding to a pedal displacement less than the first threshold displacement within a threshold time duration. The method further includes causing the LUC to move to the LUC unlocked position if the pedal tap is detected.

A system and method of diagnosing a clutch pedal position sensor of a vehicle includes determining if a speed of the vehicle speed is less than a first predetermined speed, recording a maximum clutch pedal voltage, determining if a vehicle launch event is in progress, recording a minimum clutch pedal voltage, determining a voltage difference between the maximum clutch pedal voltage and the minimum clutch pedal voltage, and declaring a clutch pedal position sensor fault based on a comparison between the voltage difference and a threshold voltage.

A method is disclosed for controlling an actuator to activate a motor vehicle clutch. A shift operation is acquired for a motor vehicle transmission. A shift actuator is controlled as a function of the acquired shift operation. The acquisition of the shift operation includes acquiring an operational force that is exerted on a shift mechanism during the operation, A shifting duration for the shift operation and/or a clutch adjustment duration (i.e., disengaging and/or engaging) of the motor vehicle clutch is modified as a function of the acquired shift operation.

An apparatus for determining a failure of an engine clutch is provided. The apparatus includes an engine clutch that is disposed between an engine generating power and a motor and a driving information detector that senses driving information including a shift speed stage, an engine speed, a motor speed, a SOC of a battery, and a vehicle speed. A controller then determines a driving mode of the engine from the detected driving information and determines whether oil leakage of the engine clutch is generated from the driving information and the driving mode.