ACCUMULATOR CONTROL DEVICE

摘要

<P>PROBLEM TO BE SOLVED: To reduce noise caused by a hydraulic pulse of an oil pump in a working machine such as a hydraulic excavator. Ž<P>SOLUTION: An accumulator control device 18 is equipped with a hydraulic cylinder 14 and a cylinder block which forms a rotary shaft rotatably arranged and a plurality of cylinder separating in circumferential direction from the rotary shaft and extending in axial direction, and rotates integrally with the rotary shaft. Furthermore, the control device is installed on a working machine which has a hydraulic pump 12 supplying a hydraulic fluid driving the hydraulic cylinder 14 and an accumulator 17 connected with a discharging port of this hydraulic pump 12 through an opening/closing valve 16, and controls a pressure accumulation movement of the accumulator 17 by the opening/closing valve 16. An opening/closing valve control means 18C is provided to control the opening/closing valve 16 to an opening condition when a sound pressure level of the noise within a cab box 9 exceeds a predetermined threshold value. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž