公开(公告)号：US20210277861A1

公开(公告)日：2021-09-09

申请号：US17329864

申请日：2021-05-25

Applicant: DENSO CORPORATION

Inventor： Kouichi MOCHIZUKI ,  Koichi OHATA ,  Atsuya OKAMOTO ,  Noritsugu KATO ,  Yuki KATO

IPC: F02M61/18

Abstract: A fuel injection valve including: an injection hole body formed of metal and having an injection hole configured to inject fuel; and a metal holder that has a cylindrical shape having an insertion port in which the injection hole body is inserted, and is fusion welded to a portion of the injection hole body located inside the insertion port. The injection hole body includes a body-side fused portion formed by fusion welding, a heat-affected portion which is located on a side of the insertion port with respect to the body-side fused portion, and of which a tissue structure is changed due to heat of the fusion welding, and a seal portion located on an opposite side of the heat-affected portion from the body-side fused portion and extending in an annular shape around a cylinder center line of the holder to come into close contact with the holder.