<p>A hydraulic control device for use in a hydraulic system having a pump supplying fluid from a reservoir to a working circuit. The control device detects leaks in the working circuit by monitoring the level of hydraulic fluid in the reservoir. In the event of a drop in the level of hydraulic fluid beyond a predetermined low level, the control device automatically diverts the fluid output side of the pump to the fluid input side to prevent further loss of fluid in the working circuit and to safeguard against cavitation in the pump due to the low level of fluid in the reservoir. The control device also senses excessive pressure peaks in the working circuit and operates to relieve the excessive pressure peaks by automatically venting a portion of the fluid on the output side of the pump to the reservoir.</p>
申请公布号
DE2533164(B2)
申请公布日期
1981.06.19
申请号
DE19752533164
申请日期
1975.07.24
申请人
INTERNATIONAL HARVESTER COMPANY MBH, 4040 NEUSS, DE
发明人
PFEIL, CHRISTIAN, DIPL.-ING., 4040 NEUSS, DE;BREIDENBACH, HANS, 4041 DELRATH, DE
