ATTACHMENT STRUCTURE OF FUEL INJECTION DEVICE NOZZLE PLATE

摘要

A metal valve body having a fuel injection port includes a nozzle plate accommodation part accommodating a nozzle plate of synthetic resin and aligning a center of the nozzle plate with a central axis of the valve body. A front end surface abutting against the nozzle plate is accommodated in the nozzle plate accommodation part. A swage projection fixes the nozzle plate to the front end side on which the fuel injection port is formed. The nozzle plate is swage-fixed in the state in which a spring action part is elastically deformed on the front end side of the valve body by the swage projection, and a nozzle hole formation part is constantly pushed against the front end surface of the valve body by the elastic force of the spring action part.

主权项

1. An attachment structure of a fuel injection device nozzle plate having a nozzle hole for atomizing and injecting fuel flowing from a fuel injection port of a fuel injection device, wherein:
a metal valve body having the fuel injection port on a front end side includes a nozzle plate accommodation part accommodating the fuel injection device nozzle plate of synthetic resin, a nozzle plate supporting part supporting the fuel injection device nozzle plate accommodated in the nozzle plate accommodation part, and a nozzle plate fixation part fixing the fuel injection nozzle plate to the front end side on which the fuel injection port is formed, the fuel injection device nozzle plate includes a nozzle hole formation part in which the nozzle hole is formed and a spring action part fixed to the front end side of the valve body by the nozzle plate fixation part while being elastically deformed, and the spring action part constantly pushes the nozzle hole formation part against the nozzle plate supporting part of the valve body when the spring action part is fixed to the front end side of the valve body by the nozzle plate fixation part while being elastically deformed.