Patent ID: 6047907
Filing Date: 2000-04-11
Classification: F02M,Y10S

Abstract:
A solenoid actuated fuel injector for use with an internal combustion engine, said fuel injector comprising:a housing having a longitudinal axis;a valve body fixed to said housing having a cylindrical sidewall generally coaxial with said axis and laterally bounding the interior of said body;a valve seat at one end of said valve body and having a seating surface facing the interior of said valve body and including a fuel outlet opening centered on the axis;means for conducting pressurized fuel into said valve body against said seating surface;a spherical valve ball moveable between a seated position against the seating surface to close said outlet opening against fuel flow, and an open position spaced from the seat surface to allow fuel flow through said outlet opening;biasing means in said valve body and biasing said valve ball toward said seated position;an armature axially moveable in said valve body and including valve ball capturing means at an end proximate said seating surface, said valve ball capturing means being engageable with the ball outer surface adjacent said seating surface and allowing the valve ball to move relative to the armature; anda solenoid coil operable to draw said armature away from said seating surface, thereby moving said valve ball to said open position and allowing fuel to pass through said fuel outlet opening, deactivation of said solenoid coil allowing said biasing means to return said valve ball to said seated position against said seating surface and to align itself in said seated position, thereby closing said outlet opening against the passage of fuel.