| 摘要 |
<p>PURPOSE:To simplify a structure, by providing an actuator which enables a valve part of a valve mechanism, controlling communication between a crank chamber and a suction chamber, to be restricted to a closed condition. CONSTITUTION:A control valve mechanism 35, which is provided to be arranged in a suction chamber 14, controls its communication with a crank chamber 10. The control valve mechanism 35, comprising a valve 353, valve seat 354 and a vacuum actuator 37, performs control action in accordance with a suction pressure, when the atmospheric pressure is introduced to a chamber 372, while moves a dish 376 to the upper placing the valve part 353 in a closed condition when a negative pressure is introduced. Accordingly, a valve for maintaining a piston stroke can be used in common with the valve controlling the suction chamber and the crank chamber.</p> |
