A prime mover control device of a work vehicle equipped with a torque converter includes: a speed ratio calculation unit that calculates a speed ratio of the torque converter; and a rotational speed limit unit that, when a speed ratio falls within a preset speed ratio range, limits a maximum rotational speed of the prime mover to be lower as compared with a maximum rotational speed set when a speed ratio falls without the preset speed ratio range. When a state in which the speed ratio calculated by the speed ratio calculation unit falls within the preset speed ratio range is maintained for a predetermined time period, the rotational speed limit unit changes a maximum rotational speed of the prime mover to a higher maximum rotational speed than the limited maximum rotational speed limited to be lower by the rotational speed limit unit.

A method for a speed controller for a motor vehicle, wherein a speed prescription is set by the driver and automatic adjustment of the speed to the speed prescription is carried out at least by setting an engine torque prescription, wherein at the start of the speed control the engine torque prescription is set to an initial value, wherein the initial value is determined in accordance with at least one parameter.

A method for a speed controller for a motor vehicle, wherein a speed prescription is set by the driver and automatic adjustment of the speed to the speed prescription is carried out at least by setting an engine torque prescription, wherein at the start of the speed control the engine torque prescription is set to an initial value, wherein the initial value is determined in accordance with at least one parameter.

In various embodiments, the present disclosure includes a cruise control system with (a) a vehicle having a steering system, an accelerator system, a braking system, a battery, a display, a processor, and memory; and (b) a cruise control program, operatively coupled to the accelerator system and configured to display a most recent cruising setpoint and a menu of user-adjustable cruising setpoints.

A prime mover control device of a work vehicle equipped with a torque converter includes: a speed ratio calculation unit that calculates a speed ratio of the torque converter; and a rotational speed limit unit that, when a speed ratio falls within a preset speed ratio range, limits a maximum rotational speed of the prime mover to be lower as compared with a maximum rotational speed set when a speed ratio falls without the preset speed ratio range. When a state in which the speed ratio calculated by the speed ratio calculation unit falls within the preset speed ratio range is maintained for a predetermined time period, the rotational speed limit unit changes a maximum rotational speed of the prime mover to a higher maximum rotational speed than the limited maximum rotational speed limited to be lower by the rotational speed limit unit.

In various embodiments, the present disclosure includes a cruise control system with (a) a vehicle having a steering system, an accelerator system, a braking system, a battery, a display, a processor, and memory; and (b) a cruise control program, operatively coupled to the accelerator system and configured to display a most recent cruising setpoint and a menu of user-adjustable cruising setpoints.

In various embodiments, the present disclosure includes a cruise control system with (a) a vehicle having a steering system, an accelerator system, a braking system, a battery, a display, a processor, and memory; and (b) a cruise control program, operatively coupled to the accelerator system and configured to display a most recent cruising setpoint and a menu of user-adjustable cruising setpoints.

In various embodiments, the present disclosure includes a cruise control system with (a) a vehicle having a steering system, an accelerator system, a braking system, a battery, a display, a processor, and memory; and (b) a cruise control program, operatively coupled to the accelerator system and configured to display a most recent cruising setpoint and a menu of user-adjustable cruising setpoints.