# US 2016/0258408 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 2016/0258408 A1 - Document ID: US20160258408A1 - Status: Published application - Kind: A1 - Application number: 15/032,173 - Filed: 2014-10-08 - Published: 2016-09-08 - Earliest claimed: 2013-11-11 - Assignees: Enplas Corporation - Applicants: Enplas Corporation - Inventors: Koji NOGUCHI - Web page: https://patentgrep.com/patent/US20160258408A1 ## 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 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. ### Claim 2 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 3 (depends on 2) The attachment structure of a fuel injection device nozzle plate according to claim 2, 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 4 (depends on 2) The attachment structure of a fuel injection device nozzle plate according to claim 2, 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 5 (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 6 (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 7 (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 8 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 cylindrical nozzle plate accommodation part accommodating the fuel injection device nozzle plate of synthetic resin and a nozzle plate supporting part supporting the fuel injection device nozzle plate accommodated in the nozzle plate accommodation part using the front end side on which the fuel injection port is formed, the nozzle plate accommodation part has, on a part of an inner peripheral surface close to an opening end, a removal prevention projection preventing the fuel injection device nozzle plate accommodated in the nozzle plate accommodation part from being removed so that the removal prevention projection is hooked on the fuel injection device nozzle plate, the fuel injection device nozzle plate includes a nozzle hole formation part in which the nozzle hole is formed and a plurality of spring action parts formed radially outward of the nozzle hole formation part, and each of the spring action parts is elastically deformed in a diameter reducing direction by the removal prevention projection when the fuel injection nozzle plate is accommodated in the nozzle plate accommodation part to enable the fuel injection nozzle plate to pass radially inward of the removal prevention projection, elastically restored in a diameter increasing direction when the fuel injection nozzle plate is accommodated in the nozzle plate accommodation part and makes contact with an inner peripheral surface of the nozzle plate accommodation part, aligns a center of the fuel injection device nozzle plate with a central axis of the valve body, is bent by the removal prevention projection, and pushes the nozzle hole formation part against the nozzle plate supporting part. ### Claim 9 (depends on 8) The attachment structure of a fuel injection device nozzle plate according to claim 8, wherein the nozzle plate supporting part is provided with a spring action part relief groove enabling the spring action part bent by the removal prevention projection to be further bent. ### Claim 10 (depends on 8) The attachment structure of a fuel injection device nozzle plate according to claim 8, wherein the spring action part is configured so as not to make contact with the nozzle plate supporting part even when the spring action part is bent by the removal prevention projection. ### Claim 11 (depends on 8) The attachment structure of a fuel injection device nozzle plate according to claim 8, wherein the fuel injection nozzle plate has a rotation prevention projection engaging with a rotation prevention groove formed in the nozzle plate accommodation part. ### Claim 12 (depends on 3) The attachment structure of a fuel injection device nozzle plate according to claim 3, 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 13 (depends on 3) The attachment structure of a fuel injection device nozzle plate according to claim 3, 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 14 (depends on 4) The attachment structure of a fuel injection device nozzle plate according to claim 4, 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 15 (depends on 3) The attachment structure of a fuel injection device nozzle plate according to claim 3, 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 16 (depends on 4) The attachment structure of a fuel injection device nozzle plate according to claim 4, 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 17 (depends on 9) The attachment structure of a fuel injection device nozzle plate according to claim 9, wherein the fuel injection nozzle plate has a rotation prevention projection engaging with a rotation prevention groove formed in the nozzle plate accommodation part. ### Claim 18 (depends on 10) The attachment structure of a fuel injection device nozzle plate according to claim 10, wherein the fuel injection nozzle plate has a rotation prevention projection engaging with a rotation prevention groove formed in the nozzle plate accommodation part.