Title:
FUEL INJECTION VALVE
Document Type and Number:
Japanese Patent JP2016050564
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To solve such the problem that in the conventional injector, since an out-orifice is arranged on the downstream side of a control valve of a three-way valve structure and the control valve is arranged in a hydraulic control chamber, the volume of the hydraulic control chamber is increased to increase pressure pulsation of fuel, and controllability of a needle is deteriorated.SOLUTION: In an injector, since an out-orifice hole 52 is provided in a control plate 6 located on a more upstream side of a control valve chamber 13 and further, the control plate 6 is arranged in a pressure control chamber 14, the volume of a hydraulic control chamber is made small, and thus the pressure pulsation in the pressure control chamber 14 can be reduced. Moreover, even when an out-orifice flow amount is increased for the purpose of reducing a fuel pressure in the pressure control chamber 14 at high speed to improve valve opening responsiveness of a needle 1, the pressure pulsation in the pressure control chamber 14 can be reduced. Accordingly, a deterioration in controllability of the needle 1 can be suppressed during the valve opening operation of the needle.SELECTED DRAWING: Figure 3
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Inventors:
TANADA YUKI
UEDA TAIJI
KAMAHARA MOTOYA
UEDA TAIJI
KAMAHARA MOTOYA
Application Number:
JP2014178105A
Publication Date:
April 11, 2016
Filing Date:
September 02, 2014
Export Citation:
Assignee:
DENSO CORP
NIPPON SOKEN
NIPPON SOKEN
International Classes:
F02M51/06; F02M47/00; F02M51/00
Domestic Patent References:
| JP2009528480A | 2009-08-06 | |||
| JP2008002306A | 2008-01-10 |
Attorney, Agent or Firm:
Kenji Ishiguro
Shinji Hase
Shinji Hase