Patent ID: 6514049
Filing Date: 2003-02-04
Classification: F04B,Y10T

Abstract:
A control valve used in connection with a variable displacement compressor that varies the discharge capacity by controlling an inclination of a cam plate located in a crank chamber, the inclination of the cam plate being variable based on control pressure in a control pressure region, monitor pressure being monitored at a predetermined point in a refrigerant circuit for causing a change in the control pressure and ultimately varying the discharge capacity, said control valve comprising:a housing; an internal control valve mechanism located inside said housing having a first valve body and a first reacting member, the first reacting member operably connected to the first valve body for reacting to the monitor pressure to cause a change in the control pressure; and an external control valve mechanism located inside said housing having a second valve body and a second reacting member, the second reacting member for reacting to an external signal to cause the second valve body to change the control pressure, wherein said internal control valve mechanism and said external control valve mechanism operate independently.