FUEL INJECTORS

摘要

A jet opening 13a for injecting fuel can be opened and closed by a ball valve 23 of a movable element 20. An orifice plate 14 is disposed on a downstream side of the jet opening and has between about eight to eighteen circular jet holes formed for further atomizing fuel particles exhausted by the jet opening 13a. Upstream side openings of the jet holes can be dispersed on a plurality of circles. A thickness t of the orifice plate and a diameter phid of the jet holes can be set to be 0.53<=t/phid<=0.82. A shortest distance L between said upstream side openings of the jet holes and a diameter phid of the jet holes can be set to be L>phid.