WORK VEHICLE, AND WORK VEHICLE CONTROL DEVICE AND CONTROL METHOD

In the present invention, a braking force function determination unit determines at least one of the offset and the slope of a required braking force for a braking force function that shows the relationship between the rotational speed of an output shaft of a transmission and a required braking force and monotonically increases the required braking force on the rotational speed so that the absolute value of at least one of the offset and the slope increases as the number of the selected speed stage input into a pull force indication device becomes smaller. A required braking force function determination unit determines the required braking force on the basis of the rotational speed of the output shaft of the transmission and the braking force function. 制动力函数决定部以如下方式决定制动力函数的相对于要求制动力的偏移和倾斜度中的至少一方，即，输入到牵引力指示装置的速度挡选择的挡数越小则偏移和倾斜度中的至少一方的绝对值变得越大，所述制动力函数示出变速器的输出轴的转速与要求制动力的关系且要求制动力相对于转速单调增加。要求制动力决定部基于变速器的输出轴的转速和制动力函数来决定要求制动力。