Torque control of hydraulic motors

Details Torque control of hydraulic motors Torque control of hydraulic motors

1979-02-08

1980-04-01

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60427, 60445, 60451, 60484, F16H 3946, F16H 3910

Patent

active

041954793

ABSTRACT:
A vehicle drive system including a rotary output, variable displacement, hydraulic motor (22) adapted to drive a wheel or the like, a pump (10) for providing hydraulic fluid under pressure to the motor, a pressure control valve (30) connected to the motor for regulating the displacement thereof to achieve a desired system pressure and having a pressure responsive surface (34) receiving a signal representative of system pressure and a biasing spring (36) acting in opposition thereto. The invention contemplates the improvement wherein a variable, settable, pressure reducing device (60,106) is connected to the pump and to the pressure control valve to apply hydraulic fluid under reduced pressure to the pressure control valve in bucking relation to the system pressure signal.

REFERENCES:
patent: 3984978 (1976-10-01), Alderson

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