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A variable displacement compressor includes a swash plate and a displacement control valve. The swash plate is moved between a maximum inclination position and a minimum inclination position in accordance with the pressure in a crank chamber. The control valve changes the crank chamber pressure to c

A variable displacement compressor includes a swash plate and a displacement control valve. The swash plate is moved between a maximum inclination position and a minimum inclination position in accordance with the pressure in a crank chamber. The control valve changes the crank chamber pressure to change the swash plate inclination. The control valve includes a valve body and an electromagnetic actuator for moving the valve body. Movement of the valve body is controlled according to current supplied to the actuator. The control valve also includes a fluid damper for applying fluid resistance to the valve body. The fluid resistance prevents the valve body from moving too quickly. The fluid damper therefore prevents the crank chamber pressure from being suddenly changed. Also, the fluid damper prevents the swash plate inclination from being suddenly changed. Instead of using the fluid damper, the sudden movement of the valve body may be prevented by controlling current supplied to the electromagnetic actuator.

대표청구항 ▼

[ What is claimed is:] [1.]1. A compressor comprising:a housing;a cylinder bore formed in the housing;a control pressure chamber defined in the housing;a piston housed in the cylinder bore, wherein the piston compresses gas drawn into the cylinder bore and discharges the gas from the cylinder bore;a

[ What is claimed is:] [1.]1. A compressor comprising:a housing;a cylinder bore formed in the housing;a control pressure chamber defined in the housing;a piston housed in the cylinder bore, wherein the piston compresses gas drawn into the cylinder bore and discharges the gas from the cylinder bore;a drive shaft rotatably supported by the housing;a drive plate operably coupled to the piston to convert rotation of the drive shaft into reciprocation of the piston, wherein the drive plate is supported by the drive shaft to incline relative to the drive shaft, and is moved between a maximum inclination position and a minimum inclination position inaccordance with the pressure in the control pressure chamber, wherein the inclination of the drive plate defines the stroke of the piston and the displacement of the compressor;a control valve, wherein the control valve controls the pressure in the control pressure chamber to change the inclination of the drive plate, and wherein the control valve is actuated based on an electrical signal; anda damping device for decreasing the speed of operation of the control valve.