US 2021/0277861 A1 · FUEL INJECTION VALVE

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.

Claims5

Dependent claims

A fuel injection valve comprising:

an injection hole body formed of metal and having an injection hole configured to inject fuel;
and
a holder formed of metal in a cylindrical shape and having an insertion port in which the injection hole body is inserted, the holder being fusion welded to a portion of the injection hole body located inside the insertion port, wherein
the injection hole body includes
a body-side fused portion formed by fusion welding,
a heat-affected portion located on a side of the insertion port with respect to the body-side fused portion,
a tissue structure of the heat-affected portion being 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, wherein
the seal portion extends in an annular shape around a cylinder center line of the holder and is in close contact with the holder.

6 more elements

Dependencies are inferred from the claim text.

Fuel injection valve

Life of this patent

Fuel injection valve

Life of this patent

Abstract

Claims5