A method for learning engine clutch kiss point of a hybrid vehicle is provided. The method includes adjusting a speed of a driving motor to be reduced when a deceleration event is generated in front of the hybrid vehicle and adjusting a speed of an engine to be synchronized with the speed of the driving motor. An engine clutch that connects the engine with the driving motor or disconnects the engine from the driving motor is engaged to start and then a kiss point of the engine clutch is learned by detecting the kiss point that is generated when the engine clutch is in a slip state.

An AWD-vehicle control device includes a transfer clutch that adjusts a driving force, a detector that detects a steering angle of a steering wheel, a detector that detects an accelerator pedal opening, a detector that detects a vehicle speed, a detector that detects an engine revolution speed, a detector that detects a turbine revolution speed of a torque converter, and a transfer clutch controller that adjusts hydraulic pressure supplied to the transfer clutch and controls a coupling force of the transfer clutch. If a predetermined period has passed from the accelerator pedal opening becoming less than a predetermined opening, the vehicle speed is within a predetermined range, a deviation between the engine and turbine revolution speeds is less than a predetermined speed, and the steering angle is equal to a first predetermined angle or greater, the transfer clutch controller controls the hydraulic pressure to reduce the coupling force.

A vehicle control device disengages a clutch provided between an engine and a driving wheel at a brake-off and an accelerator-off during traveling of the vehicle, and stops the engine and carries out inertia traveling. The vehicle control device starts the engine by the push-start by engaging the clutch and by transmitting the power of the driving wheel to the engine, if it is determined that a brake pedal has been depressed during the inertia traveling.

An AWD-vehicle control device includes a transfer clutch that adjusts a driving force, a detector that detects a steering angle of a steering wheel, a detector that detects an accelerator pedal opening, a detector that detects a vehicle speed, a detector that detects an engine revolution speed, a detector that detects a turbine revolution speed of a torque converter, and a transfer clutch controller that adjusts hydraulic pressure supplied to the transfer clutch and controls a coupling force of the transfer clutch. If a predetermined period has passed from the accelerator pedal opening becoming less than a predetermined opening, the vehicle speed is within a predetermined range, a deviation between the engine and turbine revolution speeds is less than a predetermined speed, and the steering angle is equal to a first predetermined angle or greater, the transfer clutch controller controls the hydraulic pressure to reduce the coupling force.

A method for learning engine clutch kiss point of a hybrid vehicle is provided. The method includes adjusting a speed of a driving motor to be reduced when a deceleration event is generated in front of the hybrid vehicle and adjusting a speed of an engine to be synchronized with the speed of the driving motor. An engine clutch that connects the engine with the driving motor or disconnects the engine from the driving motor is engaged to start and then a kiss point of the engine clutch is learned by detecting the kiss point that is generated when the engine clutch is in a slip state.

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.

A power transmitting apparatus can be configured to restart an engine when the acceleration pedal is actuated in an assist-start engine speed range and can improve responsiveness of engine restart. Such a power transmitting apparatus of a vehicle can provided with a clutch for selectively transmitting or cutting off a driving power of an engine to wheels. The power transmitting apparatus can comprise an assist-controller configured to increase an engine rotational speed above an self-start rotational speed by actuating the clutch when the vehicle is decelerated and fuel supply to the engine is stopped, in response to operation of an acceleration pedal of the vehicle, when the engine rotational speed is in an assist-start range which is an engine rotational speed range lower than the self-start rotational speed and higher than a starter-start rotational speed in which the engine cannot be started by a starter.

A vehicle control system is provided. The vehicle control system is applied to a vehicle having a clutch device adapted to selectively connect and disconnect a power transmission route between a prime mover and drive wheels. The vehicle control system disconnects the power transmission route during running to allow the vehicle to coast. The vehicle control system is comprised of: a means detecting a vehicle speed; a means detecting an operation of an accelerator by a driver; a means detecting a braking operation of the driver; an execution means executing a coasting control when an operating amount of the accelerator is reduced to be smaller than a predetermined value during running, by bringing the clutch device into disengagement to disconnect the power transmission route so as to allow the vehicle to coast; a determination means determining whether or not a deceleration demand of the driver is larger than a predetermined value during execution of the coasting control based on the vehicle speed and the braking operation; and a termination means determining a fact that the deceleration demand is strong if the deceleration demand is larger than the predetermined value, and that terminates the coasting control by bringing the clutch device into engagement to connect the power transmission route.