| 摘要 |
<p>PURPOSE:To achieve constant horsepower or long lamp Pc control, nearly equal to the theoretical value and without causing any change in the characteristics of said control due to change in varying moment, by actuating a control mechanism for regulating the displacement of a variable control element by means of another control pressure forming mechanism. CONSTITUTION:Control pressure (PF), controlled by the second variable orifice 46 formed between sleeve 41 and servo spool 43, is acted in back chamber 26 of control piston 21. Here, arrangement is such that control pressure (PF) acted in back chamber 26 is automatically regulated to cope with the varying moment acted to swash plate 11, if the varying moment acted to swash plate 11 is changed, so that displacement of swash plate 11 is not caused by the change in the varying moment. That is, it is enabled to achieve control nearly equal to the theoretical value, without causing change in the characteristics of constant horsepower or long lamp Pc control due to change in the varying moment.</p> |
