| 摘要 |
PURPOSE:To perform optimum flow correction control to a flow pattern by comparing the flow of pressure oil, detected by a flow sensor, with the flow pattern of a motor speed control means, and correcting the rotating speed of the motor in order to compensate the flow corresponding to the deviation. CONSTITUTION:A flow sensor 19 for detecting the flow of pressure oil is provided between a hydraulic jack 2 and a valve device 9 in a hydraulic pipeline 6. The flow Ffh detected by the flow sensor 19 is compared with the target flow Fref of a target flow reference preparing part 22 in a subtracter 23, and if there is deviation, the rotating speed of a motor 7 is increased/decreased for correction by the feedback control of the inverter of a power supply 11 according to the positive/negative of the deviation Fref'. Certain traveling characteristics and riding comfortableness can be thereby maintained constantly. |
