Injection valve and method of making orifice

Details Injection valve and method of making orifice Injection valve and method of making orifice

2011-01-25

2011-01-25

Cronin, Stephen K (Department: 3747)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C123S470000, C123S472000

Reexamination Certificate

active

07874070

ABSTRACT:
An injection valve has a nozzle body, a valve needle positioned in the nozzle body, an actuator for actuating the valve needle, and an orifice plate fixed at an end of the nozzle body. The orifice plate has a valve seat for cooperating with the valve needle and an orifice for injecting a fluid. The orifice plate is provided with a projection having a convex-curved surface on an orifice outlet side of the orifice plate. A flat surface portion is formed in the area of the convex-curved surface, and the outlet of the orifice is located in the flat surface portion.

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