Patent ID: 6601784
Filing Date: 2003-08-05
Classification: F02M

Abstract:
A fuel injector for use in an internal combustion engine, comprising:an injector body having a through extending fuel flow passage; a magnetic pole fixed within the body and defining a portion of the passage; a solenoid coil surrounding the pole; a valve seat having a discharge opening and fixed at an outlet end of the passage; and a valve assembly including an injection valve biased toward the valve seat to close fuel flow through the passage, a magnetic armature movable with the valve and responsive to action of the coil for movement between open and closed positions and a flexural element connecting the armature with the injector body and restricting radial movement while allowing axial movement of the armature within the fuel passage, wherein the flexural element is unloaded when the valve is in the closed position and the flexural element is resiliently flexed and biases the valve in a closing direction when the valve is in the open position.