Patent ID: 9511759
Filing Date: 2016-12-06
CPC Classification: B60W,F16D

Claim Text:
1. A clutch control device for a work vehicle, comprising: an accelerator pedal operation determination unit that determines as to whether or not an accelerator pedal is being operated; a vehicle speed detection unit that detects a vehicle speed of the work vehicle; a braking force detection unit that detects a braking force of the work vehicle; a clutch cutoff condition storage unit that stores a clutch cutoff condition that is defined as characteristics of the braking force of the work vehicle with respect to whether or not the accelerator pedal is being operated and the vehicle speed of the work vehicle; a determination unit that determines that the clutch cutoff condition has been established when the braking force of the work vehicle is equal to or greater than a value according to the characteristics of the braking force defined as the clutch cutoff condition, based upon whether or not the accelerator pedal is being operated, as determined by the accelerator pedal operation determination unit, the vehicle speed of the work vehicle detected by the vehicle speed detection unit and the braking force of the work vehicle detected by the braking force detection unit; and a clutch control unit that controls engagement/release of a clutch so as to release the clutch when the determination unit determines that the clutch cutoff condition has been established, wherein: the characteristics of the braking force defined as the clutch cutoff condition includes a first characteristic used when the accelerator pedal is being operated, in which the braking force at which the clutch is released decreases with increase in the vehicle speed, and a second characteristic used when the accelerator pedal is not being operated, in which the braking force at which the clutch is released is fixed at a predetermined value; and the braking force determined according to the second characteristic is lower than the braking force determined according to the first characteristic in a low-speed range in which the vehicle speed is lower than a value corresponding to an intersection point between the first characteristic and the second characteristic.