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1. (WO2018021124) FUEL INJECTION VALVE

Pub. No.:    WO/2018/021124    International Application No.:    PCT/JP2017/026178
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jul 21 01:59:59 CEST 2017
IPC: F02M 51/06
F16K 31/06
H01F 7/16
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: SAIZEN Makoto
西前 誠
MATSUMOTO Shuichi
松本 修一
TAKEDA Hideto
武田 英人
IMAI Keita
今井 啓太
Title: FUEL INJECTION VALVE
Abstract:
This fuel injection valve is provided with: a coil (70); a fixed core (50); a movable core (40); a valve body (30); an inner core portion (52) which is a portion of the fixed core which faces the movable core; an outer core portion (51) which is a portion of the fixed core which faces the movable core, and which is positioned further outwards than the inner core portion with respect to a ring centre line (C); a non-magnetic member (60) which is provided between the inner core portion and the outer core portion, and which has weaker magnetism than the fixed core; an inner welded portion (W20) which is a welded portion between the inner core portion and the non-magnetic member, and which is provided at the movable-core side of the non-magnetic member, and/or at the opposite side to the movable core; and an outer welded portion (W10) which is a welded portion between the outer core portion and the non-magnetic member, and which is provided to a welding surface (60b) of the non-magnetic member at the same side as the inner welded portion. A recess (61) is formed in a portion of the welding surface between the inner welded portion and the outer welded portion.