A control device of a hybrid vehicle including an engine, an electric motor coupled to a power transmission path between the engine and drive wheels, and a clutch connecting/disconnecting a power transmission path between the engine and both the electric motor and the drive wheels, the control device performing detection of air-fuel ratio variation between cylinders of the engine, the control device changing an operation state of the clutch based on a request drive force of the vehicle, and the control device performing the detection of air-fuel ratio variation when the clutch is in an open state or a slip amount of the clutch is equal to or larger than a preset value.

A mechanical front wheel drive roller wedging control system includes a 4WD switch in a vehicle operator station, a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position, and a throttle pedal switch actuated by the throttle pedal and that deactivates the roller cage drag mechanism when the throttle pedal is released. In an alternative embodiment, a controller may deactivate the roller cage drag mechanism when a throttle position sensor or engine speed sensor is below a minimum value.

A mechanical front wheel drive roller wedging control system includes a 4WD switch in a vehicle operator station, a roller cage drag mechanism electrically activated by the 4WD switch and providing a drag on a roller cage if the 4WD switch is in an on position, and a throttle pedal switch actuated by the throttle pedal and that deactivates the roller cage drag mechanism when the throttle pedal is released. In an alternative embodiment, a controller may deactivate the roller cage drag mechanism when a throttle position sensor or engine speed sensor is below a minimum value.

Disclosed are a method and an apparatus for controlling a damper clutch to prevent engine stall, and more particularly, to a method and an apparatus for controlling a damper clutch to prevent engine stall which can decide and correct when there is any error in control of a damper clutch in order to prevent engine stall. The method and the apparatus for controlling the damper clutch can decide and correct that a control unit of a damper clutch controller shows a wrong duty command value or a wrong current command value, thereby preventing engine stall, restraining decrease of acceleration power and blocking generation of noise or vibration.

Disclosed are a method and an apparatus for controlling a damper clutch to prevent engine stall, and more particularly, to a method and an apparatus for controlling a damper clutch to prevent engine stall which can decide and correct when there is any error in control of a damper clutch in order to prevent engine stall. The method and the apparatus for controlling the damper clutch can decide and correct that a control unit of a damper clutch controller shows a wrong duty command value or a wrong current command value, thereby preventing engine stall, restraining decrease of acceleration power and blocking generation of noise or vibration.

This clutch control device includes a clutch apparatus configured to connect and disconnect power transmission between a prime mover and an output target, a clutch actuator configured to output a driving force for actuating the clutch apparatus, and a driving mechanism configured to receive the driving force of the clutch actuator and actuate the clutch apparatus, and the driving mechanism is able to apply a driving force in either a disconnecting direction or a connecting direction to the clutch apparatus.