Camshaft Adjuster

Abstract

A camshaft adjuster including an electric servo motor ( 21 ) that is mounted in a first housing ( 14 ) and an electronics module ( 37 ), which supplies the servo motor ( 21 ) with electricity is provided. A second housing ( 26 ), which is separate from the first housing ( 14 ), is allocated to the electronics module and is attached by its exterior to the first housing ( 14 ). A wall ( 29 ) of the second housing ( 26 ) separates the servo motor ( 21 ) and the electronics module ( 37 ) to be mounted separately. A power supply and a logic element are integrated into the electronics module, allowing the camshaft adjuster to be operated as an autonomous unit.

1 . Camshaft adjuster comprising an electric servo motor arranged in a first housing and an electronics module, which is used for supplying the servo motor with electricity, a second housing, which is attached to the first housing from an outside thereof, is allocated to the electronics module, wherein a wall of the first housing or second housing separates the servo motor from the electronics module.  
   
   
       2 . Camshaft adjuster according to  claim 1 , wherein the servo motor is a brushless direct-current motor.  
   
   
       3 . Camshaft adjuster according to  claim 1 , wherein an electric connection can be established between the servo motor and the electronics module with an attachment of the second housing to the first housing via a plug connection.  
   
   
       4 . Camshaft adjuster according to  claim 1  wherein in that the servo motor and/or the electronics module are connected electrically with at least one electrical line extending outside of the first housing and/or the second housing.  
   
   
       5 . Camshaft adjuster according to  claim 1 , wherein the electronics module and the second housing are arranged at least partially radially on a side of the servo motor.  
   
   
       6 . Camshaft adjuster according to  claim 5 , wherein the first housing and the second housing are formed integrally with each other and are closed with each other with a common cover.  
   
   
       7 . Camshaft adjuster according to  claim 1 , wherein a second servo motor is provided and the electronics module is arranged at least partially between the two servo motors.  
   
   
       8 . Camshaft adjuster according to  claim 1 , wherein the electronics module has a circuit board with electronic components.  
   
   
       9 . Camshaft adjuster according to  claim 7 , wherein the wall is part of the first housing and the circuit board is attached directly to the wall.  
   
   
       10 . Camshaft adjuster according to  claim 7 , wherein several circuit boards are arranged one behind the other parallel to the wall and interconnected with each other.  
   
   
       11 . Camshaft adjuster according to  claim 1 , wherein the electronics module includes at least one sensor for operating states of the servo motor.  
   
   
       12 . Camshaft adjuster according to  claim 1 , wherein connections for three phases of the servo motor are integrated into the electronics module.  
   
   
       13 . Camshaft adjuster according to  claim 1 , wherein a heat-conductive paste or a heat-conductive pad is provided between the electronics module and adjacent components.  
   
   
       14 . Camshaft adjuster according to  claim 1 , wherein one of the preceding claims, characterized in that the electronics module has a cooling device.  
   
   
       15 . Camshaft adjuster according to  claim 1 , wherein the first housing with the servo motor forms a component, which can be attached to a housing of the camshaft adjuster, and the second housing with the electronics module forms another separate component, which can be attached to the first housing.  
   
   
       16 . Camshaft adjuster according to  claim 15 , wherein the housing of the camshaft adjuster can be attached to a cylinder head housing from an outside thereof.  
   
   
       17 . Camshaft adjuster according to  claim 14 , wherein cylinder head functions are integrated into a component with the first housing and the servo motor.  
   
   
       18 . Camshaft adjuster according to  claim 1 , wherein the wall is formed by the second housing and the wall receives a bearing for a control shaft of the servo motor.  
   
   
       19 . Camshaft adjuster according to  claim 1 , wherein the electronics module is encapsulated or extrusion coated.  
   
   
       20 . Camshaft adjuster according to  claim 1  wherein the first and/or second housing provide at least one separate or common cooling device.