Title:
FUEL INJECTION VALVE
Document Type and Number:
WIPO Patent Application WO/2020/017252
Kind Code:
A1
Abstract:
A fuel injection valve (93) comprises: a valve body (20) having an injection opening (34) provided to a first direction–side end thereof; and a needle valve (31) provided to the inner side of the valve body (20) in a manner capable of displacement in an axial direction that is both the first direction and a second direction opposite the first direction. A back pressure chamber (36) for driving the needle valve (31) in the axial direction by means of pressure change in the chamber interior is formed on the inner side of the valve body (20) further to the second direction side than the needle valve (31). The fuel injection valve (93) is provided with, on the inner side of the valve body (20), a control valve (52) for controlling the pressure within the back pressure chamber (36), and is provided with an actuator (54) for driving the control valve (52). The control valve (52) is longer in the axial direction than the needle valve (31). The actuator (54) and the second direction–side end of the control valve (52) are disposed further to the second direction side than the axial-direction center (C1) of the valve body (20).
Inventors:
TANADA HIROKI (JP)
KAMBARA MOTOYA (JP)
KAMBARA MOTOYA (JP)
Application Number:
PCT/JP2019/025080
Publication Date:
January 23, 2020
Filing Date:
June 25, 2019
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
F02M47/00; F02M51/06; F02M61/10; F02M61/16
Foreign References:
| JP2009216022A | 2009-09-24 | |||
| JPS4912229A | 1974-02-02 | |||
| JP2011196228A | 2011-10-06 |
Attorney, Agent or Firm:
YAMADA, Tsuyoshi (JP)
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