Injection valve and method for its manufacturing

Abstract

An injection valve ( 16 ) has an actuator module ( 4 ) with a cavity ( 20 ) and an actuator unit ( 14 ). The injection valve ( 16 ) further has a fluid module ( 2 ), being disposed at least partially within the cavity ( 20 ) of the actuator module ( 4 ) and a housing and a valve needle ( 8 ). The valve needle ( 8 ) is disposed in the housing and is actuatable by the actuator unit ( 14 ). The valve needle ( 8 ) is operable to prevent a fluid injection in a closing position and permit the fluid injection in further. The actuator module ( 4 ) is adhered to the fluid module ( 2 ) via a metal adhesive ( 16 ), which is arranged between a surface of the housing of the fluid module ( 2 ) and a surface of a wall of the cavity ( 20 ) of the actuator module ( 4 ).

1 . An injection valve, comprising
 an actuator module with a cavity and an actuator unit,   a fluid module, being disposed at least partially within the cavity of the actuator module and comprising a housing and a valve needle, being disposed in the housing and being actuatable by the actuator unit, the valve needle is operable to prevent a fluid injection in a closing position and permit the fluid injection in further positions at a fluid module end, with the actuator module being adhered to the fluid module via a metal adhesive, which is arranged between a surface of the housing of the fluid module and a surface of a wall of the cavity of the actuator module.   
   
   
       2 . The injection valve according to  claim 1 , wherein the metal adhesive is arranged on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is associated to the smallest gap between the housing of the fluid module and the wall of the actuator module. 
   
   
       3 . The injection valve according to  claim 1 , wherein the metal adhesive is arranged on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the actuator unit of the actuator module and the fluid module end. 
   
   
       4 . The injection valve according to  claim 1 , wherein the actuator module comprises an electrical connector being electrically coupled to the actuator unit, the metal adhesive is arranged on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the electrical connector and the fluid module end. 
   
   
       5 . A method for manufacturing an injection valve, comprising the steps of:
 providing a fluid module with a valve needle and a housing, wherein the valve needle is disposed within the housing and is operable to prevent a fluid injection in a closing position and permit the fluid injection in further positions at a fluid module end,   providing an actuator module with a cavity and an actuator unit to actuate the valve needle,   at least sectionally applying a metal adhesive on a surface of the housing of the fluid module and/or on a surface of a wall of the cavity of the actuator module,   putting the actuator module over the fluid module in such a way, that the fluid module is disposed at least partially within the cavity of the actuator module, wherein the metal adhesive is in contact with the surface of the housing of the fluid module and the surface of the wall of the cavity of the actuator module, and   hardening the metal adhesive.   
   
   
       6 . The method according to  claim 5 , wherein the metal adhesive is applied on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is associated to the smallest gap between the housing of the fluid module and the wall of the actuator module if the fluid module and the actuator module are assembled. 
   
   
       7 . The method according to  claim 5 , wherein the metal adhesive is applied on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the actuator unit of the actuator module and the fluid module end if the fluid module and the actuator module are assembled. 
   
   
       8 . The method according to  claim 5 , wherein the actuator module comprises an electrical connector being electrically coupled to the actuator unit, wherein the metal adhesive is applied on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the electrical connector and the fluid module end if the fluid module and the actuator module are assembled. 
   
   
       9 . An method for providing an injection valve, comprising the steps of:
 providing an actuator module with a cavity and an actuator unit,   disposing a fluid module at least partially within the cavity of the actuator module, wherein the fluid module comprises a housing and a valve needle, being disposed in the housing and being actuatable by the actuator unit, wherein the valve needle is operable to prevent a fluid injection in a closing position and permit the fluid injection in further positions at a fluid module end,   adhering the actuator module to the fluid module via a metal adhesive, which is arranged between a surface of the housing of the fluid module and a surface of a wall of the cavity of the actuator module.   
   
   
       10 . The method according to  claim 9 , further comprising the step of arranging the metal adhesive on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is associated to the smallest gap between the housing of the fluid module and the wall of the actuator module. 
   
   
       11 . The method according to  claim 9 , further comprising the step of arranging the metal adhesive on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the actuator unit of the actuator module and the fluid module end. 
   
   
       12 . The method according to  claim 9 , further comprising the step of coupling an electrical connector electrically to the actuator unit, and
 arranging the metal adhesive on an area of the surface of the housing of the fluid module and/or on an area of the surface of the wall of the cavity of the actuator module which is located between the electrical connector and the fluid module end.