Patent ID: 7097114

Claim:
An injector nozzle for an internal combustion engine having anti-deposit characteristics, said injector nozzle comprising: (a) an injector nozzle seat portion and needle adapted to fit against said seat and adapted to be moved between a closed position against said seat and an open position away from contact with said seat; (b) an injector nozzle pipe portion having an entrance, an inside diameter at said entrance, an interior surface, and a degree of taper; said injector nozzle having an injector nozzle seat portion and needle of such dimensions, an inside diameter at said entrance, and a degree of taper such that, when fuel is passed through said injector nozzle during operation of said internal combustion engine, a sonic shock wave is created within said injector nozzle pipe portion, and as deposits from said fuel begin to develop on said interior surface of said injector nozzle pipe portion during said operation, the frequency of said sonic shock wave changes from a first frequency at which said sonic shock wave does not cause said deposits to be removed, to a second frequency at which said sonic shock wave causes said deposits to be removed.