FUEL INJECTION VALVE - HITACHI AUTOMOTIVE SYSTEMS LTD

Title:

FUEL INJECTION VALVE

Document Type and Number:

WIPO Patent Application WO/2015/190196

Kind Code:

A1

Abstract:

When diameters of an injection hole cup and an injection hole cup support are reduced, a distance between a welded connection part of the injection hole cup and the injection hole cup support and a valve seat portion or valving element guide portion of the injection hole cup is reduced, and the valve seat portion or valving element guide portion is deformed due to distortion generated at a time of solidification after welding. This is insufficient to maintain shape accuracy. A fuel injection valve according to the present invention has, between a welded fixation part and a valve seat and guide portion of an injection hole cup, such a form that rigidity is reduced with respect to distortion generated at a time of welding. As a result, the valve seat and guide portion of the injection hole cup is prevented from being deformed due to the distortion generated at a time of solidification after the welding, and it is possible to maintain desired accuracy and prevent an increase of leaking fuel and deteriorations of a flow rate and a spray variation.

Inventors:

MIYAKE TAKAO (JP)
EHARA HIDEHARU (JP)
OGURA KIYOTAKA (JP)
IIZUKA AKIRA (JP)

Application Number:

PCT/JP2015/063407

Publication Date:

December 17, 2015

Filing Date:

May 11, 2015

Export Citation:

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Assignee:

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

International Classes:

F02M51/06; F02M61/16

Foreign References:

JP2008121679A	2008-05-29
JP5482836B2	2014-05-07
JP2001500213A	2001-01-09
JP4510804B2	2010-07-28