| 摘要 |
PURPOSE:To aim at enhancing the responsiveness and stability of a feedback control system, by actually detecting the tilting angle of a rocker cam, and by feeding-back the thus detected tilting angle to control a servo-valve. CONSTITUTION:A tilting angle detector 18 for detecting the tilting angle of a rocker cam 6 is disposed in a hydraulic pump, and an output from the detector 18 is delivered to a counter-comparator amplifier 17. Accordingly the tilting angle of the rocker cam may be corrected irrespective of delays in the responses of a servo-valve 8, a hydraulic pump 4 and a hydraulic motor 5, and therefore, the delay of feedback signals may be greatly reduced. With this arrangement, the responsiveness of the feedback system for the servo-valve 8 may be made satisfactory, and therefore, it is possible to enhance the stability of the feedback control system. |
