Ford Motor Company Limited

Brian R Kelm

Jayendra J Amin

Andrew J Klapp

Roderick D Taylor

Roderick Donald Taylor

Gary A Dage

Robert H Bean

An automotive air conditioning system has a continuously running compressor that is cycled between a high capacity mode and a low capacity mode, to achieve a desired cooling of the vehicle passenger compartment without undesired compressor stumble or compressor overheating.

Automotive air conditioning

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. As the bypass ports are uncovered, the partially compressed gas from the working chamber is vented to the low pressure chamber reducing the output of the pump. By opening several sets of ports progressively from early stages of compression to final compression, the compressor capacity is reduced with minimum waste work.

Scroll compressor capacity control valve

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.

Climate control system for electric vehicle

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.

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Northville, MI, United States of America

Brian R Kelm