Electro-hydraulic control system for a power drive unit

Details Electro-hydraulic control system for a power drive unit Electro-hydraulic control system for a power drive unit

1982-03-30

1984-12-11

Freeh, William L.

Motors: expansible chamber type

Three or more cylinders arranged in parallel radial or...

Cylinders parallel to rotation axis

60911, 417217, 417222, F01B 1304, F01B 2500

Patent

active

044871090

ABSTRACT:
The invention relates to an electro-hydraulic control system for a power drive unit having a wobbler controlled variable displacement hydraulic motor wherein the electro-hydraulic control system causes the displacement of the hydraulic motor to match a load to be driven by a power drive unit output shaft coupled to the motor. The system results in the hydraulic motor displacement matching the load as a combined function of the input command signal, the actual wobbler position, as well as the velocity and position of the power drive unit output shaft.

REFERENCES:
patent: 3429225 (1969-02-01), Keyworth
patent: 3667225 (1972-06-01), Karman
patent: 4103489 (1978-08-01), Fletcher
patent: 4139987 (1979-02-01), Budzich
patent: 4210066 (1980-01-01), Aldrich
patent: 4351152 (1982-09-01), Reynolds

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