Fuel feed system for fuel-injected IC engine - has primary and secondary fuel pumps in series to intensify pressure before transfer to common injector line

摘要

A fuel delivery system for a fuel-injected IC engine has a primary pump (2) with pressure regulator (3) which controls the supply of fuel from the tank (1) to a secondary pump (20) where the pressure is increased to a level determined by the sensor (5) and electronic controller (4). The pump (20) is operated by a piezoelectric diaphragm which is pulse energised from the controller (4) and delivers fuel via the line (6) to the injectors (7).