Valve train actuating device for an internal combustion engine

Abstract

A valve train actuating device for an internal combustion engine including a lever-type cam follower and a hydraulic support element for supporting the cam follower is provided. The hydraulic support element includes at least one piston guided in a housing ( 1 ), the piston having at least one reservoir ( 3 ) for pressure medium for a hydraulic valve lash adjustment. The piston cooperates on a supporting head ( 2 ) projecting out of the housing ( 1 ) with a supporting region ( 4 ) of the cam follower, and a pressure medium inlet is configured on the supporting head ( 2 ) and on the supporting region ( 4 ) for supplying pressure medium to the reservoir ( 3 ).

1 . A valve train actuating device for an internal combustion engine comprising a lever-type cam follower and a hydraulic support element for supporting the cam follower, said hydraulic support element comprising at least one piston guided in a housing, said piston comprising at least one reservoir for pressure medium for a hydraulic valve lash adjustment, and said piston cooperating on a supporting head projecting out of the housing with a supporting region of the cam follower, and a pressure medium inlet is configured on the supporting head and on the supporting region for supplying pressure medium to the reservoir. 
     
     
         2 . The valve train actuating device according to  claim 1 , wherein the pressure medium inlet is formed by two corresponding through-bores on the supporting region of the cam follower and on the supporting head of the piston. 
     
     
         3 . The valve train actuating device according to  claim 2 , wherein a diameter of the through-bore on the supporting region of the cam follower is larger than a diameter of the through-bore on the supporting head of the piston. 
     
     
         4 . The valve train actuating device according to  claim 1 , wherein a collector for collecting pressure medium and for routing the pressure medium into the through-bore is arranged in a region of the through-bore on an outer side of the supporting region of the cam follower turned away from the supporting head. 
     
     
         5 . The valve train actuating device according to  claim 4 , wherein the collector comprise at least one baffle plate that is connected to the supporting region of the cam follower. 
     
     
         6 . The valve train actuating device according to  claim 5 , wherein the baffle plate is configured with a funnel-like shape or with a V-shaped cross-sectional profile. 
     
     
         7 . The valve train actuating device according to  claim 5 , wherein the baffle plate is configured as a sheet metal clip that surrounds the supporting region of the cam follower at least partially. 
     
     
         8 . The valve train actuating device according to  claim 5 , wherein the baffle plate is configured in one piece with a retaining element for fixing the supporting head of the piston on the supporting region of the cam follower. 
     
     
         9 . The valve train actuating device according to  claim 1 , wherein the piston comprises two piston parts arranged coaxially to each other and behind each other in the housing, said piston protruding with a piston upper part out of the housing on the supporting head and the reservoir is arranged in an interior of the two piston parts. 
     
     
         10 . The valve train actuating device according to  claim 9 , wherein, starting from an end of the piston upper part facing away from the supporting head of piston upper part is arranged coaxially in the reservoir of the piston upper part, a bushing that extends into the supporting head.