| 摘要 |
<p>PROBLEM TO BE SOLVED: To restrain any vibration and noise from occurring by moderating compressive load acting on a piston at the time of clutch connection and coolant compression through simple structure. SOLUTION: A spool 48, where a movable discharge valve 53 is locked, makes this movable discharge valve 53 shift from a nonworking position to a working position when compressed coolant gas is fed to a second control room 60. In a bursting passage 62, its one end side is connected to a rear side suction chamber 30, and the other end side is opened on a fitting peripheral surface 47a with the spool 48 in a spool supporting part 47. In addition, in this bursting passage 63, its opening position comes nearer to a rear side discharge chamber 33 to a sealing position 67a in a state that the movable discharge valve 53 is set up in a nonworking position, and further, it is set up as to come nearer to the second control room 60 to the sealing position 67 in a state that the movable discharge valve 53 is set up in a working position, respectively.</p> |
