A displacement control valve that performs transition between operating capacities in a reduced time period. A valve element for introducing refrigerant from a discharge chamber into a pressure-regulating chamber after reducing discharge pressure Pd of the refrigerant to pressure Pc1, and a valve element...http://www.google.ca/patents/US6662581?utm_source=gb-gplus-sharePatent US6662581 - Variable displacement compressor and displacement control valve for variable displacement compressor
