| 摘要 |
<p>An axial piston pump (10) or the like rotary hydraulic machine, which includes a rotational cylinder block (28) and a valve plate (44) affixed within the housing (12) and including arcuate slots (46, 48) corresponding to the radius of rotation of the cylinders (30). The slots (46, 48) respectively connect cylinders (30) to the machine inlet and outlet ports (50, 52) as the cylinders register with the slots. The valve plate (44) also includes first and second pressure valves (72, 74) adjacent to leading edges (73, 75) of the arcuate slots (46, 48) (with respect to the direction of cylinder rotation) and responsive to fluid pressure for porting the cylinders (30) to the adjacent slots (46, 48) and thereby, in effect, extending the arcuate dimension of the slots (46, 48) and altering machine timing as a function of fluid pressure.</p> |
