Patent ID: 7832661
Filing Date: 2010-11-16
Classification: F02M,Y10T

Abstract:
1. A fuel injector for an internal combustion engine, comprising: a body having an inlet, an outlet and a longitudinal axis entering therethrough; a valve assembly regulating the flow of fuel to a combustion chamber wherein a closure member rests on a valve seat in a closed position to prohibit the flow of fuel, the valve seat having an upstream surface meeting a downstream surface to form a radius edge; a sealing band coined into the radius edge, deforming the radius edge and thereby defining a concave oblique third contact surface of the valve seat, upon the axial movement downwards of an assembly member onto a sealing surface of the valve seat, the oblique third contact surface being coin fitted with an outer convex surface of the closure member so that a portion of the outer convex surface of the closure member conforms in a complementary mating manner with and engages the concave oblique third contact surface in the closed position; and an orifice disk having at least one orifice for allowing fuel to pass from the valve assembly to the combustion chamber when the closure member is biased into an open position; wherein, prior to the formation of the sealing band, the upstream surface has an included angle that is greater than an included angle of the downstream surface thereby defining an included angle of the radius edge, and wherein the included angle of the radius edge is bisected by a line through a contact point of the closure member with the radius edge, and the center of the closure member.