| 摘要 |
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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