The pitch pressure control methodological null valve element

摘要

PROBLEM TO BE SOLVED: To provide a pressure controlling method for a motor-operated pressure regulating valve capable of regulating fluid pressure on a secondary side by approximating the fluid pressure to reference pressure in a pressure regulating range.;SOLUTION: A differential value between fluid pressures in switching an upper limit switch and/or a lower limit switch between ON and OFF is set to be enough large to regulate the fluid pressure on the secondary side of a valve element to fluid pressure near a neutral position in the pressure regulating range defined by the upper limit switch and the lower limit switch.;COPYRIGHT: (C)2002,JPO