| 摘要 |
PROBLEM TO BE SOLVED: To provide a tractor capable of executing vehicle stop control by surely and accurately decelerating only by brake operation, and capable of surely executing vehicle stop by brake operation even when deceleration is not detected or stepping force of an operator is weak.SOLUTION: A tractor includes an advance-retreat clutch 48 provided between an engine 5 and travel devices 2 and 3, a brake 135, a brake pedal 19, a brake operation force sensor 160 provided on a footrest part 19a of the brake pedal 19, and a control device 120 having a function for reducing an operation pressure of the advance-retreat clutch 48 to a prescribed pressure when stepping force equal to or more than a prescribed value is detected by the brake operation force sensor 160 and reducing the operation pressure to a pressure lower than the prescribed pressure when variation in speed or deceleration detected by a vehicle speed sensor 122 is small. Stepping is detected by the brake operation force sensor 160 provided on the footrest part 19a, and therefore, intentional brake operation by an operator can be detected. Further, vehicle stop is surely performed by brake operation even when deceleration is not detected or stepping force is weak.SELECTED DRAWING: Figure 12 |
