FUEL INJECTOR

The invention relates to a fuel injector for internal combustion engines, which comprises an axial bore (8) which can be cross-flown by fuel in the nozzle body (7), said bore receiving a nozzle needle (6) which is guided in an axially displaceable manner in the nozzle body (7). Said nozzle needle (6...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KOCH HANS JOACHIM, SCHEIBE WOLFGANG, WILDING RALPH, ZIEGLER THOMAS, CADAVID GIRALDO RICARDO, KLEIBER STEFAN, KERCKHOFF ANTON
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:The invention relates to a fuel injector for internal combustion engines, which comprises an axial bore (8) which can be cross-flown by fuel in the nozzle body (7), said bore receiving a nozzle needle (6) which is guided in an axially displaceable manner in the nozzle body (7). Said nozzle needle (6) comprises a seating surface in the nozzle head on one end thereof, and supports a bushing (1) which can be displaced in relation to the nozzle needle (6) and which is arranged on the periphery of the nozzle needle (6), on the other end thereof. Said bushing (1) defines a control chamber (10) which is connected to the chamber which is circulated by fuel on the external side of the bushing (1) via an inlet channel (2, 9) in the bushing (1) and which is supported in an elastic manner on the nozzle needle (6), in a position counter to an axial component of the fuel injector which is connected to the nozzle head (7), and comprises an outlet channel which is controlled by a control valve. According to the invention, a filter (3) for filtering the fuel which flows over the inlet channel (2, 9) to the control chamber is provided on the bushing (1).