Patent ID: 8328296

Claim:
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 parking brake device; a brake lock unit that applies a hydraulic lock on the hydraulic brake device so that the hydraulic brake device is continuously engaged in operation, and releases the hydraulic lock on the hydraulic brake device; a work brake device that includes the brake lock unit, and that is configured to continuously engage the hydraulic brake device in operation when the work vehicle is engaged in a work operation, irrespective of the brake pedal operation; a brake pedal operation detection unit that detects an operation of the brake pedal; a selection member that is to be operated by an operator to select one of a work position for engaging the work brake device in operation when the work vehicle is engaged in a work operation, a parking position for engaging the parking brake device in operation when the work vehicle is parked, and an off position for releasing the work brake device and the parking brake device; a change-over switch that is to be operated by an operator to select whether the hydraulic lock of the hydraulic brake device is controlled automatically or manually; and a control unit that, when the selection member selects the off position and the change-over switch selects that the hydraulic lock is controlled automatically, controls the brake lock unit so as to apply the hydraulic lock on the hydraulic brake device so that the work brake device is engaged in operation, upon detecting via the brake pedal operation detection unit a first predetermined depressing operation of the brake pedal; wherein, after the hydraulic lock is applied on the hydraulic brake device, the control unit (a) releases the hydraulic lock on the hydraulic brake device to release the work brake device when the first predetermined depressing operation is no longer detected and then the brake pedal operation detection unit again detects the first predetermined depressing operation or a second predetermined depressing operation of the brake pedal that is different from the first predetermined depressing operation, and (b) releases the hydraulic lock on the hydraulic brake device and engages the parking brake device in operation when the selection member selects the parking position.