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1. (WO2017153064) FUEL INJECTION VALVE

Pub. No.:    WO/2017/153064    International Application No.:    PCT/EP2017/050323
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Tue Jan 10 00:59:59 CET 2017
IPC: F02M 65/00
F02M 51/06
F02M 57/00
Applicants: ROBERT BOSCH GMBH
Inventors: LEUKERT, Torsten
Title: FUEL INJECTION VALVE
Abstract:
Fuel injection valve having an injector housing (1) and a nozzle body (2) which forms a high pressure chamber (3) which can be filled with highly pressurized fuel. A nozzle needle (4) which is configured such that it can be moved with a reciprocating movement is arranged in said high pressure chamber (3), which nozzle needle (4) interacts with a sealing surface (9) with a nozzle body seat (12) in order to open and close at least one injection opening (11). Here, the nozzle needle (4) has a guide section (7''), with which it is guided in the radial direction in a guide region (8) of the high pressure chamber (3), and in the process forms an electrical contact resistance (R 3 ) between the nozzle body (2) and the nozzle needle (4) in the guide region (8). The nozzle body (2) and the nozzle needle (4) can be contacted electrically, with the result that an electric voltage (U) can be applied between the nozzle body (2) and the nozzle needle (4). The electrical contact resistance (R 3 ) is dependent on the stroke of the nozzle needle (4).