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A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission

A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission servo control system. The vehicle ground speed is continuously monitored by a speed sensor operatively associated with a rotating gear in the vehicle drive train that rotates in proportion to vehicle ground speed, to create a ground speed signal. The selectable set speed signal can be input to controller memory by driving the vehicle at a desired ground speed and then activating a speed set switch. The speed control algorithm of the controller thereafter compares the set speed to the ground speed signal from the speed sensor and corrects the control signal to the proportional valve to correct hydrostatic transmission speed output.

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A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission

A cruise control system for a utility vehicle, which is speed-controlled by a hydrostatic transmission, includes a controller having an input for receiving a selectable set speed signal, and an output for sending a speed control signal to at least one proportional valve of a hydrostatic transmission servo control system. The vehicle ground speed is continuously monitored by a speed sensor operatively associated with a rotating gear in the vehicle drive train that rotates in proportion to vehicle ground speed, to create a ground speed signal. The selectable set speed signal can be input to controller memory by driving the vehicle at a desired ground speed and then activating a speed set switch. The speed control algorithm of the controller thereafter compares the set speed to the ground speed signal from the speed sensor and corrects the control signal to the proportional valve to correct hydrostatic transmission speed output. ovements of the pistons to operate an operation object according to the signal, wherein: the disk plate is separated into a first disk plate to which the root of the operation lever is attached and a second disk plate which is tiltably supported by the tilting fulcrum; twisting means are disposed to twist the first disk plate about the lever axis of the operation lever independent of the second disk plate; and a signal corresponding to the twisted position of the first disk plate about the lever axis is output to operate the operation object according to the signal. 6. The operation lever device according to claim 5, wherein the twisting means twists the operation lever about the lever axis from a neutral twisting position to a predetermined twisting position, and wherein the operation lever device further comprises: an elastic member for returning the operation lever to the neutral twisting position when the operation lever is twisted about the lever axis. 7. An operation lever device which is provided with a disk plate to which the root of an operation lever is attached and a tilting fulcrum which tiltably supports the disk plate, moves pistons via the disk plate according to the tilting operation of the operation lever, and outputs a signal according to the movements of the pistons to operate an operation object according to the signal, wherein: the disk plate is separated into a first disk plate to which the root of the operation lever is attached and a second disk plate which is tiltably supported by the twisting fulcrum; twisting means are disposed to twist the first disk plate about the lever axis of the operation lever independent of the second disk plate from a neutral twisting position to a predetermined twisting position; an elastic member is disposed to return the first disk plate to the neutral twisting position when the first disk plate is twisted about the lever axis, and a signal is output according to the twisting position of the first disk plate about the lever axis to operate the operation object according to the signal. 8. The operation lever device according to claim 5 or 7, wherein the first disk plate is twistably supported by the second disk plate through a bearing. 73515, 20000600, Elton et al., 074/564; US-6109241, 20000800, Engelgau, 123/399; US-6173625, 20010100, McFarlane et al., 074/512; US-6178847, 20010100, Willemsen et al., 074/512; US-6389927, 20020500, Willemsen, 074/514