Hydromechanical control system for a power drive unit

Details Hydromechanical control system for a power drive unit Hydromechanical control system for a power drive unit

1988-04-07

1990-04-10

Smith, Leonard E.

Motors: expansible chamber type

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

Means varies cyclic relation between reciprocating member...

F01B 1304

Patent

active

049150162

ABSTRACT:
A hydromechanical control system for a power drive unit having a hydraulic motor of the axial piston type, including a wobbler to vary the axial displacement of the pistons of the motor. A cylinder block is coupled to a shaft for rotation therewith. The cylinder block defines a plurality reciprocally movable therein. A port plate is provided at one end of the cylinder block, with kidney-shaped ports concentric with the axis of rotation of the cylinder block, in alignment with the cylinders and in communication with fluid supply and return conduits. A solenoid-operated piston-cylinder device rotatably adjusts the position of the port plate to adjust the positions of the ports relative to the incline plane of the wobbler.

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