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1. (WO2018042910) FUEL INJECTION DEVICE

Pub. No.:    WO/2018/042910    International Application No.:    PCT/JP2017/025849
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Jul 19 01:59:59 CEST 2017
IPC: F02M 61/18
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: KUSAKABE Ryo
草壁 亮
IIZUKA Akira
飯塚 智
OGURA Kiyotaka
小倉 清隆
Title: FUEL INJECTION DEVICE
Abstract:
The present invention provides a fuel injection device having a reduced spray reaching distance. To this end, among multiple injection orifices, the orifice formed to have a larger injection orifice angle, that is, an angle formed by the normal direction to the seat surface and the central axis direction of the orifice, than the injection orifice angles of the other injection orifices is configured such that the flow velocity at the exit face of the injection orifice when the valve is opened becomes smaller than the flow velocity at the exit face of any other injection orifice when the valve is opened.