Patent ID: 8676458

Claim:
An automatic clutch control device, comprising: a clutch interposed between a driving shaft of a prime mover for a vehicle and an input shaft of a transmission; a clutch actuator for controlling the disconnection and connection of the clutch; a target clutch torque calculation section for calculating a target clutch torque; a gear change control section responsive to a gear change command for controlling a clutch torque transmitted from the prime mover to the input shaft by the operation of the clutch actuator to perform a disconnection control that disconnects the clutch and for controlling the clutch torque to become the target clutch torque to perform an engaging control that synchronizes the prime mover rotational speed of the prime mover with the input shaft rotational speed of the input shaft; a prime mover rotational speed detecting section for detecting as prime mover rotational speed the rotational speed of the driving shaft of the prime mover; an input shaft rotational speed detecting section for detecting the input shaft rotational speed of the input shaft; an accelerator pressing-down speed detecting section for detecting the pressing-down and the pressing-down speed of an accelerator; a pressing-down speed threshold value judging section for judging whether or not the accelerator pressing-down speed detected by the accelerator pressing-down speed detecting section exceeds at least one predetermined pressing-down speed threshold value, when a downshift gear change command for a gear change from a higher gear stage to a lower gear stage is outputted after the pressing-down of the accelerator is detected; a prime mover rotational speed increasing control section operated when the accelerator pressing-down speed exceeds the at least one predetermined pressing-down speed threshold value, for disconnecting the input shaft and the prime mover by the disconnection control of the clutch and then for controlling the prime mover rotational speed to increase and come to be equal to the input shaft rotational speed of the input shaft which has been increased by the lower speed gear stage, having been established in response to the gear change command, beyond the input shaft rotational speed before the gear change; and a target clutch torque change calculation section for calculating a change amount that changes the target clutch torque in dependence on the magnitude of the accelerator pressing-down speed.