| 摘要 |
The strut unit includes a piston dividing an oil-filled working cylinder into first and second working spaces, wherein the second working space is connected to a high pressure chamber having a gas cushion; a hollow piston rod defining a pump cylinder; and a pump rod received in pump cylinder. The pump rod has a bore extending between its ends, and a deregulating opening which connects the bore to the second working space when the piston rod is extended. A first check valve permits flow from the low pressure chamber into the bore; a second check valve permits flow from the bore into the pump cylinder; and a third check valve permits flow from the pump cylinder to the second working space. The check valves are formed as substantially identical modules having cylindrical valve housings which can be press fit into a recess in either of two orientations.
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