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1. (WO2017178132) FUEL INJECTION NOZZLE

Pub. No.:    WO/2017/178132    International Application No.:    PCT/EP2017/053227
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Wed Feb 15 00:59:59 CET 2017
IPC: F02M 51/06
F02M 61/16
Applicants: ROBERT BOSCH GMBH
Inventors: LANG, Heike
COMMER, Peter
Title: FUEL INJECTION NOZZLE
Abstract:
The invention relates to a fuel injection nozzle, comprising an injector housing (1) and an nozzle body (2), which forms a high-pressure chamber (15) that can be filled with fuel that is under high pressure. A nozzle needle (5) is arranged in said high-pressure chamber (15) for movement in a reciprocating manner, which nozzle needle interacts with a sealing surface (7) having a nozzle seat (6) in order to open and close at least one injection opening (8). In addition, the high-pressure chamber (15) has a sleeve element (14), in which a first coil (10) and a second coil (9) are arranged. Furthermore, a first magnet core (12) is arranged in the high-pressure chamber (15). The end of the nozzle needle (5) facing away from the nozzle seat is designed as a second magnet core (11). Furthermore, the distance d between the end of the nozzle needle (5) facing away from the nozzle seat and the first magnet core (12) corresponds to the maximum nozzle needle stroke.