Title:
FUEL INJECTION VALVE
Document Type and Number:
Japanese Patent JP2014137038
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of improving a sealing property while maintaining a physique.SOLUTION: A first needle 20 that can move forward and backward integrally with a movable core has an elastic member 24 that can contact a first valve seat 111 formed on a protrusion 110 of a first cylinder member 11. A second needle 30 provided at a position opposite to the first needle 20 has a valve part 31 that can contact a second valve seat 112 of the protrusion 110. The valve part 31 is formed so that a diameter R2 of a second seal of the valve part 31 and the second valve seat 112 is larger than a diameter R1 of a first seal of the elastic member 24 and the first valve seat 111. When the first needle 20 is separated from the first valve seat 111 by an electromagnetic suction force between the stationary core and the movable core, fuel in a first pressure chamber 26 flows in an intermediate chamber 27. When the second needle 30 is separated from the second valve seat 112 by pressure of the fuel in the second pressure chamber 27, the fuel in the intermediate chamber 27 is injected into a cylinder of an engine through the second pressure chamber 36 and an injection hole 141.
Inventors:
SUZUKI KUNINORI
FUJINO TOMOKI
FUJINO TOMOKI
Application Number:
JP2013007118A
Publication Date:
July 28, 2014
Filing Date:
January 18, 2013
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M51/06
Domestic Patent References:
| JP2009537742A | 2009-10-29 | |||
| JPH0199967U | 1989-07-05 | |||
| JP2012533024A | 2012-12-20 | |||
| JP2005337207A | 2005-12-08 |
Attorney, Agent or Firm:
Masaki Hattori