This invention reduces the size of the solenoid section of the control valve and simplifies its mechanism. In particular, the invention is intended to enable the control of a variable capacity compressor. In the differential pressure section B.sub.1, a path is formed between a compressor's P.sub.c pressure...http://www.google.ca/patents/US5282329?utm_source=gb-gplus-sharePatent US5282329 - Solenoid type control valve
