FUEL INJECTION NOZZLE

摘要

A fuel injection nozzle of the outwardly opening type has a valve member (16) movable outwardly by the fuel pressure within a bore (15) in a nozzle body (10). The valve member is biased to the closed position by an elastic member in the form of a rod (18) formed integrally with the valve member and extending within the bore. At its end remote from the valve head the rod engages a collar (20) between which and an adjacent part of the valve body is a shim (21). The thickness of the shim is selected so that the tension force in the rod is higher than is required to give the desired nozzle opening pressure and this is adjusted to the desired value by compressing a portion of the nozzle body using a cap nut (24) which secures the nozzle body to a supporting part.