Title:
FUEL INJECTION VALVE AND FUEL INJECTION SYSTEM
Document Type and Number:
Japanese Patent JP2019157678
Kind Code:
A
Abstract:
To provide a fuel injection valve capable of suppressing accumulation of deposit on an injection hole body.SOLUTION: An entire part at a downstream-side of fuel flow with respect to a seat surface 20s of an outer face of a needle 20 is a valve element tip surface 22, and a distance between the valve element tip surface 22 and the injection hole body 11 in a direction of an axis C1 of the needle 20 is a needle separation distance Ha (valve element separation distance). Further a circle on the axis C1 passing through centers of inflow ports 11in of injection holes 11a is an inflow central virtual circle R2, and a part including at least the center axis of a face opposed to the valve element tip surface 22, of the injection hole body 11 is a body bottom surface 112. The valve element tip surface 22 is curved in a direction to be projected to a side of the injection hole body 11, and the needle separation distance Ha is continuously reduced along a direction toward the axis C1 in a radial direction from a peripheral edge of the inflow central virtual circle R2.SELECTED DRAWING: Figure 8
Inventors:
IMAI KEITA
KITO TAKANORI
HARADA HIROYUKI
KITO TAKANORI
HARADA HIROYUKI
Application Number:
JP2018042228A
Publication Date:
September 19, 2019
Filing Date:
March 08, 2018
Export Citation:
Assignee:
DENSO CORP
International Classes:
F02M61/18; F02D41/02; F02D41/32; F02M51/00; F02M51/06; F02M61/10; F02M61/16
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo