MULTIPLE DISK SWIRL ATOMIZER FOR FUEL INJECTOR

摘要

An electrically operated fuel injector (20) for injecting fuel into an internal combustion engine comprising a fuel inlet at which pressurised fuel enters the fuel injector (20), a fuel passageway extending from the fuel inlet through the fuel injector (20) to a nozzle from which fuel is injected into an engine, an electrically operated needle valve (42) for opening and closing the fuel passageway between the fuel inlet and the nozzle, and a stack of thin disks (22A, 22B) disposed proximate the nozzle and comprising orifice means through which fuel axially passes before being injected into an engine from the nozzle, the stack of thin disks (22A, 22B) comprising a first disk (22A) disposed upstream of a second disk (22B), the first and second disks (22A, 22B) comprising respective areas disposed face-to-face against each other, whereby the first disk (22A) comprises a first through-orifice (60A, 60B, 60C, 60D), said areas cooperatively define between themselves a channel (68A, 68B, 68C, 68D) into which the first through-orifice (60A, 60B, 60C, 60D) delivers fuel, the second disk (22B) comprises a second through-orifice (62) to which the channel (68A, 68B, 68C, 68D) conveys fuel, and the channel (68A, 68B, 68C, 68D) is constructed and arranged in relation to the second through-orifice (62) in the second disk (22B) such that a tangential component of velocity is imparted to fuel passing axially through and exiting the second through-orifice in the second disk (22B).