Valve train assembly

Abstract

A valve train assembly has at least a camshaft with at least a first cam body and a second cam body, each axially movable over the camshaft between a first axial position and a second axial position and each earn body being provided with a first cam for controlling a valve in the first axial position and a second cam for controlling the valve in the second axial position; and one or more couplers for coupling the movement of the cam bodies. A first groove extends along a part of the circumference of the first cam body. A second groove extends along a part of the circumference of the second cam body, An engager for engaging alternately the first. and second groove is included, such that either the first cam body is moved to the first axial position or the second cam body is moved to the second axial position.

1 : A valve train assembly comprising:
 a camshaft including a first cam body and a second cam body, each cam body being axially movable over the camshaft between a first axial position and a second axial position, and each cam body including a first cam configured to control a valve in the first axial position and a second cam configured to control the valve in the second axial position;   a coupler configured to couple a movement of the first cam body and the second cam body;   a first groove extending along a part of a circumference of the first cam body;   a second groove extending along a part of a circumference of the second cam body; and   an engager configured to alternately engage the first and second groove, such that either the first cam body is moved to the first axial position or the second cam body is moved to the second axial position.   
     
     
         2 : The assembly of  claim 1 , wherein the engager includes a first movable pin configured to engage in the first groove and a second movable pin configured to engage in the second groove. 
     
     
         3 : The assembly of  claim 2 , wherein the engager further includes a solenoid connected to each movable pin,
 wherein the solenoid is configured to move a respective movable pin into engagement with the respective groove.   
     
     
         4 : The assembly of  claim 1 , wherein the first groove includes, in rotation direction, an axial direction component towards a side of the second axial position, and
 wherein the second groove includes, in rotation direction, an axial direction component towards a side of the first axial position   
     
     
         5 : The assembly of  claim 4 , wherein the first groove is mirror-symmetrical to the second groove. 
     
     
         6 : The assembly of  claim 1 , wherein the first cam body and second cam body are substantially cylindrical. 
     
     
         7 . The assembly of  claim 6 , wherein the cam bodies include an axial groove, and
 wherein the cam shaft includes a corresponding axial rib.