INJECTOR WITH LOWER DYNAMIC LOSSES

摘要

High-pressure fuel injector comprising a needle (2) sliding in an injector body (1), having, on each side of this needle, an injection chamber (7) and a control chamber (13) on which the discharge via a solenoid valve (23) causes the opening of the injection chamber (7), characterized in that the control chamber (13) has at least a main passage (17) and a secondary passage (18) of a cross section smaller than that of the main passage (17), and a moving member (14) for shutting off the main passage (17) when the control chamber (13) is set to discharge.