Patent ID: 6878095

Claim:
An automatic-clutch control system of a transmission with an automatic clutch for a vehicle, the transmission producing a transmission ratio by changing an engagement state of gears in the transmission under an input power canceled state realized by disengaging the automatic clutch, the automatic-clutch control system comprising: a controller configured to slip the automatic clutch by decreasing an engagement force of the automatic clutch when the vehicle is put in a coast traveling condition and a deceleration of the vehicle is greater than or equal to a first predetermined value under a condition that shifting is not being executed, wherein the controller is configured to decrease the engagement force of the automatic clutch according to an increase of the deceleration of the vehicle, and the controller is configured to disengage the automatic clutch when the vehicle is put in a coast traveling condition and when the deceleration of the vehicle is greater than or equal to a second predetermined value, which is greater than the first predetermined value.