Hydrostatic self-regulating drive system

Details Hydrostatic self-regulating drive system Hydrostatic self-regulating drive system

1984-11-30

1986-06-24

Michalsky, Gerald A.

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

60447, B60K 4116, B60K 1710

Patent

active

045961182

ABSTRACT:
A hydrostatic drive system has an internal combustion engine, a main pump driven by the engine and having a control element displaceable to vary the pump displacement, a control pump driven by the engine, an output motor having a control element displaceable to vary the motor displacement and having a rotary output, and conduits interconnecting the main pump and output motor for driving of the motor by the pump. A speed-measuring pump is connected to the motor output and produces a pressure differential corresponding to the speed of the motor output. A pump controller is powered by the control pump and connected to the pump control element for adjusting the pump displacement. A motor controller is connected to the motor control element for adjusting the motor displacement. An engine controller includes a first engine cylinder connected to the speed-measuring motor and operable thereby for adjusting the engine speed and a second engine cylinder connected to the control pump and operable thereby for affecting engine speed.

REFERENCES:
patent: 4149380 (1979-04-01), Nonnenmacher

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