CONTROL VALVE FOR VARIABLE DISPLACEMENT TYPE COMPRESSOR, VARIABLE DISPLACEMENT TYPE COMPRESSOR, AND VARIABLE SETTING METHOD FOR SET SUCTION PRESSURE

摘要

PROBLEM TO BE SOLVED: To provide a control valve for a variable displacement type compressor in which a set suction pressure can be varied. ;SOLUTION: A bellows 66 and a setting spring 68 urging the bellow 66 toward an extension direction are provided within a pressure sensing chamber 63 of an internal control type capacity control valve 60. The pressure sensing chamber 63 communicates with a suction chamber 38 (a region of a suction pressure Ps) of a compressor through a fixed throttle 69, while the pressure sensing chamber 63 can communicate with a discharge chamber 39 (a region of a discharge pressure Pd) of the compressor through a discharge gas feeding passage 52. A fixed throttle 71 and a solenoid valve 73 are provided halfway through the passage 52. A controller 58 controls opening/closing of the solenoid valve 73 according to data on a vehicle running state. According to the opening/ closing of the solenoid valve 73, a set suction pressure of the control valve 60 is variably set to a value between an initial value decided depending on the setting spring 68 and a value except the initial value.;COPYRIGHT: (C)2000,JPO