Title:
FUEL INJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/155092
Kind Code:
A1
Abstract:
The present invention addresses the problem of variations in spray beams or injection flow volumes from individual injection openings due to changes in the flow of fuel into the injection openings during each injection, which are caused by movements of a valve body in indefinite directions due to a minute gap that exists between the valve body and a guide. A fuel injection device is provided with: a valve body (303, 102) which is seated on or unseated from a seat portion 304; a plurality of guide portions (302a, 302b, 302c, 302d) for slidably guiding the valve body (303, 102); and a plurality of flow channel portions (306a, 306b, 306c, 306d) formed between guide portions 302 (302a, 302b, 302c, 302d) that are circumferentially adjacent to each other. Among the plurality of flow channel portions (306a, 306b, 306c, 306d), a first flow channel portion (306c) is configured such that a cross-sectional area thereof in a horizontal plane perpendicular to a central axis 100a of the valve body (303, 102) is smaller than a cross-sectional area in the horizontal plane of all the other flow channel portions (306a, 306b, 306d).
Inventors:
ISHII EIJI (JP)
YOSHIMURA KAZUKI (JP)
YASUKAWA YOSHIHITO (JP)
YOSHIMURA KAZUKI (JP)
YASUKAWA YOSHIHITO (JP)
Application Number:
PCT/JP2018/002840
Publication Date:
August 30, 2018
Filing Date:
January 30, 2018
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
F02M61/16; F02M51/06; F02M61/18
Foreign References:
| JP2006144749A | 2006-06-08 | |||
| JP2002227749A | 2002-08-14 | |||
| JPH10299605A | 1998-11-10 | |||
| JP2000170625A | 2000-06-20 |
Attorney, Agent or Firm:
TODA Yuji (JP)
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