Electronic control for a hydraulically driven generator

  • US 7,759,811 B2
  • Filed: 11/26/2008
  • Issued: 07/20/2010
  • Est. Priority Date: 01/17/2006
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims

    Thank you for your feedback