# US 2016/0258407 A1 · Method of manufacturing an injector for injecting fluid and injector for injecting fluid > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0258407 A1 - Document ID: US20160258407A1 - Status: Published application - Kind: A1 - Application number: 15/059,346 - Filed: 2016-03-03 - Published: 2016-09-08 - Earliest claimed: 2015-03-05 - Assignees: Continental Automotive GmbH - Applicants: Continental Automotive GmbH - Inventors: STEFANO FILIPPI; MAURO GRANDI; FRANCESCO LENZI; VALERIO POLIDORI - Web page: https://patentgrep.com/patent/US20160258407A1 ## CPC - F02M 61/18: Injection nozzles, e.g. having valve seats; {Details of valve member seated ends, not otherwise provided for} - F02M 51/0614: {characterised by arrangement of electromagnets or fixed armature} - F02M 51/0671: {the armature having an elongated valve body attached thereto} - F02M 51/0689: {and permanent magnets (F02M51/0696 takes precedence)} - F02M 61/161: {Means for adjusting injection-valve lift} - F02M 61/168: {Assembling; Disassembling; Manufacturing; Adjusting} - F02M 65/001: {Measuring fuel delivery of a fuel injector} - F02M 61/188: {Spherical or partly spherical shaped valve member ends} - F02M 2200/8061: involving press-fit, i.e. interference or friction fit - F02M 2200/8084: involving welding or soldering - F02M 2200/8092: adjusting or calibration - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract A valve assembly is provided with a valve body, a valve needle and an armature. An actuator assembly surrounds the valve assembly. The actuator assembly includes a housing and a coil. The coil can be energized so as to induce a force for axially displacing the armature. A flow characteristic of fluid to be injected by the injector is adjusted by axially shifting the valve assembly and the actuator assembly relative to one another. ## Claims ### Claim 1 A method of manufacturing an injector for injecting fluid, the method comprising: providing a valve assembly having a valve body, a valve needle and an armature, the valve body defining a longitudinal axis and being formed with a cavity configured to receive therein the valve needle and the armature, the valve needle and the armature being mounted for axial movement relative to the valve body and being operable to control an injection of fluid from the cavity to an exterior of the injector; providing an actuator assembly surrounding the valve assembly, the actuator assembly including a housing and a coil, the coil being energizeable to induce a force for axially displacing the armature; and adjusting a flow characteristic of the fluid to be injected by the injector by axially shifting the valve assembly and the actuator assembly relative to one another. ### Claim 2 (depends on 1) The method according to claim 1, wherein the actuator assembly comprises, in addition to the coil, a further magnetic element which is operable to induce a force for axially displacing the armature. ### Claim 3 (depends on 1) The method according to claim 1, which further comprises: providing a physical model having an input parameter; operating the injector for determining a value of the input parameter; determining a shifting value by using the physical model with the determined value of the input parameter; and axially shifting the valve assembly and the actuator assembly relative to one another depending on the shifting value thus determined. ### Claim 4 (depends on 1) The method according to claim 1, which further comprises a step of fixedly coupling the valve assembly and the actuator assembly to one another after the adjusting step. ### Claim 5 (depends on 4) The method according to claim 4, which comprises welding the valve assembly and the actuator assembly to one another. ### Claim 6 (depends on 1) The method according to claim 1, wherein the fluid is a gas. ### Claim 7 (depends on 6) The method according to claim 6, wherein the fluid is air or nitrogen. ### Claim 8 (depends on 1) The method according to claim 1, wherein the fluid is a liquid. ### Claim 9 (depends on 8) The method according to claim 8, wherein the fluid is N-heptane. ### Claim 10 An injector for injecting fluid, the injector comprising: a valve assembly having a valve body, a valve needle and an armature, said valve body defining a longitudinal axis and being formed with a cavity configured to receive therein said valve needle and said armature, said valve needle and said armature being mounted for axial movement relative to said valve body and being operable to control a flow rate of injected fluid from the cavity to an exterior of said injector; an actuator assembly surrounding said valve assembly, said actuator assembly having a housing and a coil, said coil being energizeable to induce a force for axially displacing the armature; and wherein said valve assembly and said actuator assembly are shaped and disposed to enable an adjustment of a flow characteristic of fluid to be injected by the injector by axially shifting said valve assembly and said actuator assembly relative to one another during an assembly of the injector. ### Claim 11 (depends on 10) The injector according to the claim 10, wherein said valve assembly and said actuator assembly are friction-locked to one another, but said valve assembly and said actuator assembly are not positively engaged so as to block a relative axial movement of said valve assembly and said actuator assembly. ### Claim 12 (depends on 10) The injector according to the claim 10, wherein said actuator assembly does not laterally overlap any portion of said valve assembly which said actuator assembly overlaps axially. ### Claim 13 (depends on 10) The injector according to the claim 10, wherein said valve assembly comprises a valve spring disposed to axially bias said valve needle, said valve spring being received in said cavity and having a stiffness equal to 25 N/mm or higher. ### Claim 14 (depends on 10) The injector according to the claim 10, wherein a rigid connection is established between said valve assembly and said actuator assembly. ### Claim 15 (depends on 14) The injector according to the claim 14, wherein said rigid connection is a welded connection. ### Claim 16 (depends on 10) The injector according to the claim 10, wherein said actuator assembly comprises a further magnetic element. ### Claim 17 (depends on 16) The injector according to the claim 16, wherein said further magnetic element is a permanent magnet. ### Claim 18 (depends on 16) The injector according to the claim 16, wherein said further magnetic element is arranged with poles thereof oriented radially with respect to the longitudinal axis.