Title:
FUEL INJECTION VALVE
Document Type and Number:
Japanese Patent JP2018009548
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection valve which can suppress a bounce of a movable core while suppressing vibration or a hammering sound at valve-opening.SOLUTION: A housing 20 has a fuel passage 100 for guiding fuel into an injection hole. A needle 30 is arranged so as to be reciprocal in the fuel passage 100, and opens and closes the injection hole. A movable core 40 is arranged outside the needle 30 in a radial direction. A fixed core 50 has a regulation face 520 which can regulate the movement of the movable core 40 to a valve-opening direction by abutting on an upper face 410. An elastic member 70 is formed into a cylindrical shape, and arranged at the injection hole side of the fixed core 50, an end face of the elastic member at the injection hole side when the needle 30 closes the injection hole is located at the injection hole side rather than a virtual plane Vp including the regulation face 520, and the elastic member has a member lower end face 702 which can abut on the upper face 410 of the movable core 40 at the end face at injection hole side, and is elastically deformable to an axial direction. In the elastic member 70, a damper chamber 101 being an annular space is formed between and among an internal peripheral wall, the upper face 410 and the fixed core 50.SELECTED DRAWING: Figure 2
Inventors:
OIKAWA SHINOBU
ITO EIJI
ITO EIJI
Application Number:
JP2016140409A
Publication Date:
January 18, 2018
Filing Date:
July 15, 2016
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M51/06; F02M61/16
Domestic Patent References:
| JP2003021014A | 2003-01-24 | |||
| JP2014141902A | 2014-08-07 | |||
| JP2013100756A | 2013-05-23 | |||
| JP2010196505A | 2010-09-09 | |||
| JP2012225185A | 2012-11-15 |
Attorney, Agent or Firm:
Masaki Hattori