Electronic control for a hydraulically driven generator
DCFirst Claim
1. A hydraulic system for driving an auxiliary power source, located aboard a motor vehicle having a primary power source, at a substantially constant speed despite fluctuations in rotational speed of the primary power source, the system comprising:
- a variable displacement hydraulic pump drivably connectable to the primary power source, the hydraulic pump having an inlet for receiving fluid, an outlet for discharging fluid under pressure and a pump displacement input;
a hydraulic motor drivably connectable to an auxiliary power source, the hydraulic motor having an inlet for receiving fluid under pressure and an outlet for discharging fluid;
a fluid circuit including a supply conduit for conducting fluid discharged by the pump to the motor, a return conduit for returning fluid discharged by the motor to the pump;
a pump displacement control cooperating with the pump displacement input in order to vary the displacement of the pump; and
a control circuit in communication with the pump displacement control for controlling the pump output so that a desired hydraulic motor and associated auxiliary power source speed can be maintained.
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Accused Products
Abstract
Hydraulic system for driving an auxiliary power source is provided, which is specifically adapted for use with a system for controlling hydraulically driven AC generator. The system includes a hydraulic pump and hydraulic motor that are connected by a fluid circuit. The hydraulic motor drivably connected to an AC generator and is operated in a manner to generate a stable AC power output. The system may include a valve which bypasses fluid around the motor or a variable displacement pump so that the fluid flow rate through the hydraulic motor is controlled in a manner to maintain the desired AC generator output level. Sensors are further provided measuring operating parameters of the system so that the controller can maintain desired operating condition limits.
32 Citations
11 Claims
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1. A hydraulic system for driving an auxiliary power source, located aboard a motor vehicle having a primary power source, at a substantially constant speed despite fluctuations in rotational speed of the primary power source, the system comprising:
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a variable displacement hydraulic pump drivably connectable to the primary power source, the hydraulic pump having an inlet for receiving fluid, an outlet for discharging fluid under pressure and a pump displacement input; a hydraulic motor drivably connectable to an auxiliary power source, the hydraulic motor having an inlet for receiving fluid under pressure and an outlet for discharging fluid; a fluid circuit including a supply conduit for conducting fluid discharged by the pump to the motor, a return conduit for returning fluid discharged by the motor to the pump; a pump displacement control cooperating with the pump displacement input in order to vary the displacement of the pump; and a control circuit in communication with the pump displacement control for controlling the pump output so that a desired hydraulic motor and associated auxiliary power source speed can be maintained. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification