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1. (WO2018221077) ELECTROMAGNETIC VALVE, ELECTROMAGNETIC INLET VALVE MECHANISM, AND HIGH-PRESSURE FUEL PUMP

Pub. No.:    WO/2018/221077    International Application No.:    PCT/JP2018/016525
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: F02M 59/36
F02M 59/34
F02M 59/44
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: SAITO Atsuji
斉藤 淳治
USUI Satoshi
臼井 悟史
NEMOTO Masashi
根本 雅史
AKIYAMA Moritsugu
秋山 壮嗣
TOKUMARU Kazuaki
徳丸 千彰
UCHIYAMA Yasuhisa
内山 康久
HAYATANI Masahiko
早谷 政彦
ONOSE Toru
小野瀬 亨
HIMOTO Tohru
枇本 亘
SUMIYA Noboru
住谷 登
Title: ELECTROMAGNETIC VALVE, ELECTROMAGNETIC INLET VALVE MECHANISM, AND HIGH-PRESSURE FUEL PUMP
Abstract:
Provided are an electromagnetic valve, an electromagnetic inlet valve mechanism, and a high-pressure fuel pump that suppress movement of an inlet valve in the radial direction and improve flow rate controllability even when pressure becomes high or flow rate becomes high. This valve mechanism is provided with: a spring member that includes an end coil section and a movable section and that is secured by a spring support section on the side opposite the end coil section; and a valve body that is biased by the end coil section-side of the spring member. The valve body has formed therein a protrusion section that protrudes toward the spring support section-side and that is located on the radially inner side of the spring member. In a cross-section that passes through the radial center of the spring member and is cut in the spring member axial direction, a tip section of the protrusion section is positioned on the spring support section-side with respect to a coil cross-section on both sides of at least the first turn of the movable section that is adjacent to the end coil section.