Abstract: A variable displacement compressor for an air conditioning system includes a suction throttle valve. The suction throttle valve includes a housing with a cavity formed therein. A first piston reciprocatingly disposed in the cavity is configured to cause a variable restriction of a flow of refrigerant through a suction inlet formed in the housing. The suction inlet provides fluid communication between a suction port and the cavity formed in the housing. The refrigerant flows through the suction port in a direction that is not parallel to a direction the piston reciprocates within the cavity. The suction throttle valve is configured to increase the restriction in the suction inlet when a crankcase pressure associated with the variable displacement compression is increased relative to an external suction pressure of the refrigerant entering the suction throttle valve.

Abstract: A variable displacement compressor for an air conditioning system includes a suction throttle valve. The suction throttle valve includes a housing with a cavity formed therein. A first piston reciprocatingly disposed in the cavity is configured to cause a variable restriction of a flow of refrigerant through a suction inlet formed in the housing. The suction inlet provides fluid communication between a suction port and the cavity formed in the housing. The refrigerant flows through the suction port in a direction that is not parallel to a direction the piston reciprocates within the cavity. The suction throttle valve is configured to increase the restriction in the suction inlet when a crankcase pressure associated with the variable displacement compression is increased relative to an external suction pressure of the refrigerant entering the suction throttle valve.

Abstract: A variable displacement piston compressor comprising a housing and a shaft supported within the housing for rotational movement about an axis. The shaft includes a stepped down portion defining a reduced diameter within the shaft. A pin extends generally outward from the shaft and includes a distal end. A sleeve is mounted about the shaft, is slidable along the shaft, and is rotatable with the shaft. The sleeve extends over a portion of the stepped down portion of the shaft and defines a radial gap between the sleeve and the stepped down portion. A swash-ring is supported on the sleeve and is rotatable with the shaft. The swash-ring is pivotably coupled to the distal end of the pin. The swash-ring defines an angle with the axis that is adjustable with respect to the axis. A biasing member engages the sleeve and biases the sleeve along the shaft.

Abstract: A variable displacement piston compressor comprising a housing and a shaft supported within the housing for rotational movement about an axis. The shaft includes a stepped down portion defining a reduced diameter within the shaft. A pin extends generally outward from the shaft and includes a distal end. A sleeve is mounted about the shaft, is slidable along the shaft, and is rotatable with the shaft. The sleeve extends over a portion of the stepped down portion of the shaft and defines a radial gap between the sleeve and the stepped down portion. A swash-ring is supported on the sleeve and is rotatable with the shaft. The swash-ring is pivotably coupled to the distal end of the pin. The swash-ring defines an angle with the axis that is adjustable with respect to the axis. A biasing member engages the sleeve and biases the sleeve along the shaft.

Abstract: A scroll compressor has a housing, fixed and movable scrolls mounted in the housing, and a control valve. The fixed scroll has a discharge port and pairs of bypass ports located at thermodynamically symmetrical points in the compression cycle relative to said discharge port The moving scroll is mounted in the housing and intermeshed with the fixed scroll to trap a volume of fluid. A rotatable, cylindrical control valve has pairs of slots therein that are alignable with the pairs of bypass ports to sequentially vent the trapped fluid and modulate the capacity of the compressor. The valve controls the pumping capacity of the scroll compressor by placing a series of bypass ports across the base of the fixed scroll. The bypass ports allow gas to flow from the compression chambers via the control valve to the low pressure chamber. The flow and sequencing of the ports is controlled by rotating the valve crossing over the ports.

Abstract: A climate control system for an electric vehicle includes a programmed microcomputer for controlling the pre-conditioning of the vehicle prior to usage as well as heating, ventilating and air conditioning of the vehicle under normal operating conditions. The microcomputer responds to a plurality of vehicle operator inputs and sensor inputs and provides outputs to control the speed of the compressor, condenser fan and blower fan, and the position of a temperature blend door and a Fresh Air/Recirculating Air door to optimize the use of electrical energy.

Abstract: An accumulator for an air conditioning system having a compressor, a condenser and an evaporator wherein the accumulator receives refrigerant from the evaporator at a location near an upper wall thereof, said accumulator including a domed baffle plate in its interior adjacent the accumulator inlet opening whereby liquid portions of the refrigerant are dispersed to the sides of the accumulator allowing the gaseous components of the refrigerant to accumulate in the upper regions of the accumulator adjacent the inlet opening of an outlet tube that extends vertically through the accumulator.