| 摘要 |
PROBLEM TO BE SOLVED: To prevent the early wearing of a fixed mechanism to prevent a unpleasant knocking at the time of starting of an engine. SOLUTION: This hydraulic fluid circuit comprises a reversible hydraulic engine 10, a braking device 12, two main conduits 26, 28 connected to two main holes for supply and discharge of the engine, and a main selector 50 suitable for occupying two operating positions for selecting a flow of fluid between a static position, the main hole of the engine, and the main conduit connected therewith. The circuit also comprises a selecting middle system 52 capable of occupying a first arrangement where the main selector 50 is kept at the static position, and a second arrangement where the main selector 50 is apart from the static position. Control means 50, 60 for the selecting middle system are connected to the braking device 12 in such a way that the middle system can shift from the first arrangement to the second arrangement only when a brake does not operate.
|
