Electromagnetic fuel injection valve

摘要

A valve (5) controlled by an electromagnetic metering valve (41) comprising a head (49) having a control chamber (56), a supply conduit (57), and a drain conduit (58). The head (49) also presents a cavity (67) communicating with the supply conduit (57) and in which a portion (68) of the moving element (8, 28) for closing the injection orifice (11) slides in such a manner as to choke the supply conduit (57) during injection. The supply conduit (57) communicates with a receiving chamber (59) located between a seat (51) in the body (6) of the valve (5) and the outer surface of an appendix (54) on the head (49); and the moving element (8, 28) is pushed into the closed position by the combined action of the pressure at each end, and a spring (37) located close to the injection chamber (19).