US 11,835,020 B2
Fuel injection valve
Masayuki Niwa, Nisshin (JP); Yosuke Nakagawa, Kariya (JP); Masahiro Okuma, Kariya (JP); Noritsugu Kato, Kariya (JP); and Hiroki Kaneta, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Jan. 6, 2021, as Appl. No. 17/142,631.
Application 17/142,631 is a continuation of application No. PCT/JP2019/019426, filed on May 16, 2019.
Claims priority of application No. 2018-132562 (JP), filed on Jul. 12, 2018.
Prior Publication US 2021/0123403 A1, Apr. 29, 2021
Int. Cl. F02M 61/10 (2006.01)
CPC F02M 61/10 (2013.01) 20 Claims
OG exemplary drawing
 
1. A fuel injection valve, comprising:
a nozzle body having an injection hole, configured for fuel injection, and a fuel passage connecting to the injection hole; and
a needle configured to open and close the fuel passage to switch between fuel injection from the injection hole and stopping the fuel injection, wherein
an injection hole axis extends along a center of the injection hole,
an injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis,
the injection hole perpendicular cross section has a flat shape,
the injection hole perpendicular cross section has an area gradually expanding from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape,
the inlet is formed in a curved surface,
the outlet is formed in a flat surface,
the inlet has an outer end and an inner end with respect to a radial direction of a center line of the nozzle body,
the outlet has an outer end and an inner end with respect to the radial direction of the center line of the nozzle body, and
the inlet and the outlet are inclined relative to each other, such that a linear distance between the outer end of the inlet and the outer end of the outlet is smaller than a linear distance between the inner end of the inlet and the inner end of the outlet.