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AssigneeWestport Research Inc.
InventorsPatric Ouellette, Alain M. J. Touchette, Guowei Li, Silviu Dumitrescu
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A gaseous and liquid fuel injection valve for an internal combustion engine comprises an injection valve body that houses two separate concentric fuel injection valve assemblies. The first valve assembly is a pilot fuel needle valve assembly, which comprises a first needle movable in the direction of the longitudinal axis of the body between an open and a closed position. The second valve assembly is a gaseous fuel needle valve assembly, which comprises a second needle movable in the direction of the longitudinal axis between an open and a closed position. The gaseous fuel needle valve assembly controls the injection of gaseous fuel into the combustion chamber through a plurality of gaseous fuel holes formed in a nozzle tip of the gaseous fuel needle valve assembly. At least one of the nozzle tips is rotatable to thereby change the position of the pilot fuel holes with respect to the gaseous fuel holes. The number of the plurality of pilot fuel holes is different from the number of the plurality of gaseous fuel holes.
A gaseous and liquid fuel injection valve for an internal combustion engine, said fuel injection valve comprising:
A method of injecting pilot and gaseous fuel into an internal combustion engine, said engine comprising a combustion chamber and an injection valve associated therewith, said injection valve comprising (1) an injection valve body, (2) a pilot fuel needle valve assembly disposed within said body, said pilot fuel needle valve assembly comprising a first needle that is movable in the direction of the longitudinal axis of said body between an open and a closed position, said pilot fuel needle valve assembly having a plurality of pilot fuel holes formed in a nozzle tip thereof, and (3) 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 that is movable in the direction of said longitudinal axis between an open and a closed position, said gaseous fuel needle valve assembly having a plurality of gaseous fuel holes formed in a nozzle tip thereof, said plurality of pilot fuel holes being different in number from said plurality of gaseous fuel holes, said method comprising:
Dependencies are inferred from the claim text.