# US 2018/0320649 A1 · Attachment structure of fuel injection device nozzle plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0320649 A1 - Document ID: US20180320649A1 - Status: Published application - Kind: A1 - Application number: 16/032,692 - Filed: 2018-07-11 - Published: 2018-11-08 - Earliest claimed: 2013-11-11 - Assignees: Enplas Corporation - Applicants: Enplas Corporation - Inventors: Koji NOGUCHI - Web page: https://patentgrep.com/patent/US20180320649A1 ## CPC - F02M 61/1853: {Orifice plates} - F02M 51/08: specially for low-pressure fuel-injection - F02M 61/1893: {Details of valve member ends not covered by groups F02M61/1866 - F02M61/188} - F02M 69/044: {for injecting into the intake conduit downstream of an air throttle valve} - F02M 51/06: Injectors peculiar thereto {with means directly operating the valve needle} - F02M 69/043: {for injecting into the intake conduit upstream of an air throttle valve} - F02M 2200/8053: involving mechanical deformation of the apparatus or parts thereof - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract 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. ## Claims ### Claim 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 includes a nozzle plate accommodation part accommodating the fuel injection device nozzle plate of synthetic resin and aligning a center of the fuel injection device nozzle plate with a central axis of the valve body, a nozzle plate supporting part abutting against the fuel injection device nozzle plate accommodated in the nozzle plate accommodation part, and a swage 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 swage-fixed to the front end side of the valve body while being elastically deformed since the swage part is plastically 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 swage part while being elastically deformed. ### Claim 2 (depends on 1) The attachment structure of a fuel injection device nozzle plate according to claim 1, wherein a plurality of spring action parts are formed around the nozzle hole formation part, and a plurality of swage parts are formed so as to correspond to the plurality of spring action parts. ### Claim 3 (depends on 2) The attachment structure of a fuel injection device nozzle plate according to claim 2, wherein a part of the spring action part engages with a rotation prevention groove formed by partially cutting out the nozzle plate accommodation part, so the fuel injection device nozzle plate is positioned and fixed while being prevented from rotating about the central axis of the valve body. ### Claim 4 (depends on 2) The attachment structure of a fuel injection device nozzle plate according to claim 2, wherein the fuel injection device nozzle plate is provided with a rotation prevention projection engaging with a rotation prevention groove formed by partially cutting out the nozzle plate accommodation part and the rotation prevention projection engages with the rotation prevention groove, so the fuel injection device nozzle plate is positioned and fixed while being prevented from rotating about the central axis of the valve body. ### Claim 5 (depends on 2) The attachment structure of a fuel injection device nozzle plate according to claim 2, wherein the spring action part has an inclined plane pushed by the swage part having been plastically deformed and is pushed against the nozzle plate supporting part by an inclined plane component force acting on the inclined plane. ### Claim 6 (depends on 1) The attachment structure of a fuel injection device nozzle plate according to claim 1, wherein a plurality of spring action parts are formed around the nozzle hole formation part, and the nozzle plate accommodation part is formed so as to surround the fuel injection device nozzle plate and the swage part is formed as at least a part of the nozzle plate accommodation part. ### Claim 7 (depends on 6) The attachment structure of a fuel injection device nozzle plate according to claim 6, wherein the fuel injection device nozzle plate is provided with a rotation prevention projection engaging with a rotation prevention groove formed by partially cutting out the nozzle plate accommodation part and the rotation prevention projection engages with the rotation prevention groove, so the fuel injection device nozzle plate is positioned and fixed while being prevented from rotating about the central axis of the valve body. ### Claim 8 (depends on 6) The attachment structure of a fuel injection device nozzle plate according to claim 6, wherein the spring action part has an inclined plane pushed by the swage part having been plastically deformed and is pushed against the nozzle plate supporting part by an inclined plane component force acting on the inclined plane. ### Claim 9 (depends on 1) The attachment structure of a fuel injection device nozzle plate according to claim 1, wherein a part of the spring action part engages with a rotation prevention groove formed by partially cutting out the nozzle plate accommodation part, so the fuel injection device nozzle plate is positioned and fixed while being prevented from rotating about the central axis of the valve body. ### Claim 10 (depends on 1) The attachment structure of a fuel injection device nozzle plate according to claim 1, wherein the fuel injection device nozzle plate is provided with a rotation prevention projection engaging with a rotation prevention groove formed by partially cutting out the nozzle plate accommodation part and the rotation prevention projection engages with the rotation prevention groove, so the fuel injection device nozzle plate is positioned and fixed while being prevented from rotating about the central axis of the valve body. ### Claim 11 (depends on 1) The attachment structure of a fuel injection device nozzle plate according to claim 1, wherein the spring action part has an inclined plane pushed by the swage part having been plastically deformed and is pushed against the nozzle plate supporting part by an inclined plane component force acting on the inclined plane.