Patent ID: 6273346
Filing Date: 2001-08-14
Classification: F02B,F02M,Y02T

Abstract:
A fuel injector for injecting fuel into a combustion chamber of a spark ignition engine, comprising:an injector body having an axial passage,a one-piece element fixed within the body in a downstream portion of said axial passage, formed with a seat located between a spraying orifice and an axial bore,a needle terminated by a closure element for co-operating with said seat, said needle being slidably received in said bore and axially displaceable between a first axial position, in which the closure element bears against the seat, and a second axial position in which the closure element is spaced apart from the seat,said one-piece element being diabolo-shaped and co-operating with said downstream portion of the body to define an annular fuel feed chamber having a plurality of ports communicating the fuel feed chamber with said bore immediately upstream from the seat and opening out tangentially into the bore, andpassage means for feeding the chamber with fuel from said axial passage.