FIELD: mechanical engineering; gaseous or liquid fuel systems of internal combustion engines. SUBSTANCE: diaphragm installed in pressure regulator housing is rigidly connected with rod whose end is mechanically coupled with valve dividing space inside housing into first and second chambers. First chamber has first union for connecting to reservoirs keeping fuel under pressure. Second chamber has second union for connecting to engine fuel system. Diaphragm is loaded by spring with adjusting screw resting against free end of spring. Screw is installed along diaphragm axis in hole in housing cover. Pressure regulator has second diaphragm whose diameter exceeds that of first diaphragm. Second diaphragm is coupled by rod coaxial with first rod, with first diaphragm. Second diaphragm divides pressure regulator housing into third and fourth chambers. Third chamber communicates with atmosphere through hole in pressure regulator housing. Fourth chamber has third union for connection with engine manifold. EFFECT: increased accuracy of fuel pressure control at pressure regulator output depending on different operating conditions of engine. 1 dwg
