Patent ID: 8479898
Filing Date: 2013-07-09
Classification: B60G,B60T,E02F

Abstract:
1. A control device for a work vehicle, comprising: a hydraulic brake device that generates a braking force corresponding to a brake pedal operation performed while the vehicle is traveling; a brake lock unit that applies and releases a hydraulic lock on the hydraulic brake device; a brake pedal operation detection unit that detects an operation of the brake pedal; a brake lock control unit that controls the brake lock unit so as to apply the hydraulic lock on the hydraulic brake device upon detecting via the brake pedal operation detection unit a predetermined depressing operation of the brake pedal; a ram cylinder that supports an axle of the vehicle; a cylinder lock unit that applies and releases a hydraulic lock on the ram cylinder so that the axle is not allowed to rock when the ram cylinder is in a lock engaged state and is allowed to rock when the ram cylinder is in a lock released state; a traveling pedal operation detection unit that detects an operation of a traveling pedal; a vehicle speed detection unit that detects a vehicle speed; and a cylinder lock control unit that controls the cylinder lock unit so as to apply the hydraulic lock on the ram cylinder when lock engage conditions under which non-operation at the traveling pedal is detected by the traveling pedal operation detection unit and the vehicle speed detection unit detects that the vehicle is in a stationary state or is traveling at a speed equal to or lower than a predetermined speed are achieved, and so as to release the hydraulic lock on the ram cylinder only after the hydraulic lock on the hydraulic brake device is released by the brake lock unit.