专利名称：METHOD AND DEVICE FOR CONTROLLING A
HYDRAULIC SYSTEM
发明人：ANDERSSON, BO,LUNDGREN, BERTIL申请号：EP10792421申请日：20100623公开号：EP2446151A4公开日：20140312
摘要：A method and a device for controlling a load sensing hydraulic system, having abypass valve (F), which is controlled by a pump pressure (P) and which when the hydraulicsystem is in operation diverts a pump flow of hydraulic fluid to a tank (E). The bypassvalve (F) is pre-stressed towards a closed position and is put on load by the pumppressure (P) towards an open position against the action of the pre-stress. When thehydraulic system operates in a idling operation a first pre-stress element (I) limits thepre-stress to a first pressure and upon activation of the hydraulic system, a pressureregulator (10) increases the pre-stress to a second, substantially higher pressure byapplying a hydraulic, constant second pre-stress force, that is added to the first pre-stress force and is substantially greater than this.
申请人：NORDHYDRAULIC AB
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