| 摘要 |
The hydraulic control arrangement has a pump (10) which serves to supply a single-acting working cylinder (18) and a double-acting working cylinder (32). The control is effected either via a reversing valve (16) and an electromagnetically releasable, pilot-controlled non-return valve (17) or via two of such valves (50, 51; 103, 123), of which each is allocated to a working cylinder. Whereas the pump is switched on to extend both working cylinders and to lower the double-acting one, the single-acting working cylinder is retracted with the pump switched off. As a result, the electromagnetically operable non-return valve (17) is relieved. A control arrangement of this type is especially suitable for actuating liftgates of trucks. <IMAGE>
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