| 摘要 |
The invention discloses a pressure fluid control arrangement, especially for hydrostatic control mechanisms for motor vehicles. The control arrangement consists of an outer valve element 2 and an inner valve element 3 concentrically arranged therein and able to move relative thereto by the vehicle's steering wheel. The valve element has a plurality of ring-shaped control channels, which are placed in various communication with each other upon relative movement of the element, so that communication is maintained between a high-pressure oil pump 7, a displacement pump 20 serving as a dispensing arrangement and operated by the vehicle's steering wheel, and a servomotor 27 for the vehicle's controlled wheels. To prevent loss of pressurised oil dispensed from the displacement pump 20 to the servomotor because of unavoidable leakage, thereby resulting in nonexact adjustment of the servomotor, the control channels 21, 14, 22, 23 which provide pressurised oil to the servomotor are surrounded by channels 10, 9 which are in direct communication with the high-pressure oil pump. Because at least the same high pressure prevails in these latter channels as in the former, leakage from the channels communicating with the servomotor is effectively prevented. <IMAGE> |
