Variable displacement compressor

Abstract

A branch passage which branches off from a portion of a supply passage on the downstream side of a supply control valve and communicates with a suction chamber is provided, and when providing a release control valve which, while allowing working fluid to flow, moves in response to the differential pressure between the downstream side pressure of the supply control valve and the pressure of a control pressure chamber on the supply passage, while preventing the movement of a valve element from being inhibited by a foreign substance in refrigerant, a leakage of the refrigerant into a suction chamber is suppressed when supplying the refrigerant from a discharge chamber to the control pressure chamber via the supply passage, enhancing control performance. A release control valvehas a valve elementincluding a valve bodywhich, being disposed, in a valve housing spaceprovided on a supply passage, so as to be movable in an axial direction of the valve housing space, varies the degree of opening of the communication between a control pressure chamberand a branch passage, and a flangewhich is abutted, in an axial direction of the valve housing space, against a shoulderformed on the inner peripheral wall of the valve housing space, thereby sealing between the valve bodyand the inner peripheral wall of the valve housing space, wherein a configuration is such that the branch passageis covered by the valve bodyin a state in which the flangeis abutted against the shoulder