Patent ID: 7818110

Claim:
A work vehicle travel control device that controls travel of a work vehicle in accordance with set lines indicating a relationship between an operation stroke of an operation device and a speed ratio of left and right crawler tracks or wheels of a vehicle body, wherein a first line on which the speed ratio decreases corresponding to a change in the operation stroke, a second line that has hysteresis with respect to the first line and on which the speed ratio increases corresponding to a change in the operation stroke, and third lines on which the speed ratio changes corresponding to a change in the operation stroke and the change in the speed ratio with respect to the change in the operation stroke is smaller than that of the first line and that of the second line, are set, and control means is provided for controlling the speed ratio to decrease in accordance with the first line when the operation device is operated from a point on the first line in a direction that the speed ratio decreases, to increase in accordance with the second line when the operation device is operated from a point on the second line in a direction that the speed ratio increases, to change in accordance with the third lines when the operation device is operated from a point on the first line in a direction that the speed ratio increases, or when the operation device is operated from a point on the second line in a direction that the speed ratio decreases.