Fuel injection nozzle for internal combustion engines
AssigneeRobert Bosch GmbH
InventorsEwald Eblen, Odon Kopse
Life of this patent
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Abstract
A fuel injection nozzle is proposed having two nozzle needles in which the control of the fuel delivered via an inflow line is effected by means of a slide valve embodied as a 3-way valve, which in a preferred embodiment of the invention is simultaneously embodied as a 3-position valve and permits not only the alternative exertion of the fuel pressure upon one of the nozzle needles but also a common pressure exertion of both nozzle needles.
Claims7
A fuel injection nozzle for internal combustion engines comprising a nozzle body including a fuel inlet line and having two nozzle needles disposed longitudinally in said nozzle body and thereby arranged to control fuel flow from the inlet line to at least one injection port, each of said nozzle needles having pressure shoulders thereon, a pressure chamber disposed in said nozzle body in the region of said pressure shoulders and further including a separate inlet channel communicating with each of said pressure chambers, at least one of which is arranged to communicate with said fuel inlet line via a slide valve means as needed, characterized in that said slide valve means is embodied as a 3-way valve provided with a slide, by means of which said fuel inlet line can be made to communicate with at least one of said separate inlet channels to said pressure chambers in said nozzle body.
Dependencies are inferred from the claim text.