Pressure controlled injector for injecting fuel
AssigneeRobert Bosch GmbH
InventorFriedrich Boecking
Life of this patent
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Abstract
The invention relates to an injector for reservoir (common rail) injection systems for direct-injection internal combustion engines in which a nozzle needle which is surrounded by a nozzle chamber is guided in an injector housing. The inlet of the nozzle chamber is closable and openable via an externally actuatable closing element. From the nozzle inlet, inlets branch off to control parts. The inlets are embodied as throttle elements, one of which is closable on the outlet side via a closing element.
Claims8
An injector for injecting fuel into the combustion chambers of an internal combustion engine, the injector comprising a nozzle needle (13), which is guided in an injector housing (2) and surrounded by a nozzle chamber (12), said nozzle chamber (12) having an inlet (9) closable and openable via an externally actuatable, first closing element (5), and inlets (10, 11) to control chambers (24, 29) which inlets (10, 11) branch off from the inlet (9), said inlets (10, 11) being embodied as throttle elements, wherein said control chambers (24, 29) are connected to a leaking oil line (26), and wherein the connection of a selected one of said control chambers (24, 29) to the leaking oil line (26) is closable via a second closing element (23), wherein the second closing element (23) is a valve ring (23) which surrounds a control part portion (19).
Dependencies are inferred from the claim text.