Patent ID: 6793158
Filing Date: 2004-09-21
Classification: F02M

Abstract:
A fuel injector for an internal combustion engine; the injector comprising a fuel inlet; actuating means; and a metering valve activated by said actuating means to open and close an injection nozzle, and comprising a control chamber communicating with said inlet and defined by an end wall having a hole permitting fuel outflow from said control chamber, a shutter activated by the actuating means to move along a longitudinal axis with respect to said end wall, and mating means for mating said shutter and said end wall to close said hole in fluidtight manner; said mating means comprising a first and a second surface carried by said shutter and said end wall respectively, and which extend about said hole facing and parallel to each other, and mate by resting one on the other; characterized in that said mating means also comprise channeling means formed about said hole in at least one of said first and second surfaces.