FUEL FEED SYSTEM OF INTERNAL COMBUSTION ENGINE Russian patent published in 1999 - IPC

FIELD: mechanical engineering; internal combustion engines with injection of fuel (mainly gasoline) into combustion chamber through electrically controlled nozzles. SUBSTANCE: to provide automatically capacity of fuel injection pump corresponding to required operating conditions of engine and constant pressure before nozzles at all duties, constant pressure throttle valve is built into system fuel main line before nozzles and hydraulic accumulator. Controlled throttle at inlet of fuel injection pump is made in form of bushing and spring-loaded spool. Spring space of spool end is connected with fuel tank or with outlet of fuel feed pump, and space at opposite end is connected with outlet of fuel injection pump. Inlet of throttling section is connected with pressure main line of fuel feed pump, and outlet, with inlet of fuel injection pump. EFFECT: provision of automatic maintenance of required capacity of fuel injection pump corresponding to engine operating conditions, simplified design. 2 cl, 1 dwg