A variable displacement compressor and a displacement control valve for use in
such compressors, varies the displacement of the compressor by closing or opening
a control path between a discharge chamber or a suction chamber and a crank chamber.
The valve includes a valve body for closing or opening the control path; a control
rod; and a rod passage receiving the control rod. A first end of the control rod
is affixed to the valve body, and the control rod extends from the valve body to
a solenoid for urging the valve body to close or open the control path. The control
rod is tapered, such that a first cross-sectional area of the control rod proximate
to the valve body is greater than a second cross-sectional area of the control
rod proximate to the solenoid to close or open the control path. A method for manufacturing
such compressors includes the steps of providing a displacement control valve,
wherein the valve comprises a valve body, a control rod, a rod passage receiving
the control rod, wherein a first end of the control rod is affixed to the valve
body and the control rod extends from the valve body to the solenoid for urging
the valve body to close or open the control path; and tapering the control rod.
The rod is tapered, such that a first cross-sectional area of the control rod proximate
to the valve body is greater than a second cross-sectional area of the control
rod proximate to the solenoid for urging the valve body to close or open the control path.
