Electromagnetic fuel injector

F - Mech Eng,Light,Heat,Weapons – 02 – M

Patent

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F02M 51/06 (2006.01) F02M 61/16 (2006.01) F02B 1/04 (2006.01) F02M 51/08 (2006.01) F02M 63/00 (2006.01)

Patent

CA 1092459

ELECTROMAGNETIC FUEL INJECTOR -- Abstract of the Disclosure -- An electromagnetic fuel injector for use in a spark ignition internal combustion engine and, in parti- cular, for use in a low pressure, throttle body fuel injection system for such an engine. The fuel injector includes an electromagnet actuated valve having a semi- spherical seating surface thereon for cooperation with an annular valve seat at one end of a nozzle assembly for controlling the injection flow of fuel from the injector and a flat surface for abutment against the end of the armature of an electromagnet. This valve is biased toward a closed position in seating engagement against the valve seat by a spring associated with the armature and is biased toward an open position relative to the valve seat by an opposed spring upon energization of the electromagnet. The electromagnet structure includes a small diameter axial extending small diameter guide pin slidably received in a guide bore of the armature for reducing sliding friction of the armature. In a preferred enbodiment the nozzle assembly is threaded into the injector body to abut against a deformable abutment shoul- der whereby the stroke of the armature-valve can be adjusted. 52

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