Patent ID: 6439192
Filing Date: 2002-08-27
Classification: F02D,F02M,Y02T

Abstract:
A gaseous and liquid fuel injection valve for an internal combustion engine, said fuel injection valve comprising:(a) an injection valve body; (b) a pilot fuel needle valve assembly disposed within said body, said pilot fuel needle valve assembly comprising a first needle movable in the direction of the longitudinal axis of said body between an open and a closed position for controlling injection of pilot fuel into a combustion chamber of said engine through a plurality of pilot fuel holes formed in a nozzle tip of said pilot needle valve assembly; (c) a gaseous fuel needle valve assembly disposed within said body and concentric with said pilot fuel needle valve assembly, said gaseous fuel needle valve assembly comprising a second needle movable in the direction of said longitudinal axis between an open and a closed position for controlling the injection of gaseous fuel into said combustion chamber through a plurality of gaseous fuel holes formed in a nozzle tip of said gaseous fuel needle valve assembly; wherein at least one of said nozzle tips is rotatable to thereby change the position of said pilot fuel holes with respect to said gaseous fuel holes, and wherein the number of said plurality of pilot fuel holes is different from the number of said plurality of gaseous fuel holes.