Patent ID: 8869764
Filing Date: 2014-10-28
Classification: F01L,F01M

Abstract:
1. A valve drive for an internal combustion engine, with a rocker arm ( 40 ) being arranged in its cylinder head, pivotal by the cams of a cam shaft, and supported with one end ( 41 ) at the valve shaft of a charge-cycle valve, while it comprises a ball scraper ( 46 ) at its other end, which rests on the spherical end section ( 44 , 45 ) of a support element ( 42 , 43 ) embodied as a hydraulic valve clearance compensation element, characterized in that a groove shaped ventilation channel ( 57 , 59 ) is arranged in the contact area between the ball scraper ( 46 ) of the rocker arm ( 40 ) and the spherical end section ( 44 , 45 ) of the support element ( 42 , 43 ), by which the oil reservoir ( 54 ) of the support element ( 42 , 43 ) is open towards the outside; wherein said groove shaped ventilation channel ( 57 , 59 ) is connected to a central lubrication channel ( 58 ) in said support element ( 42 , 43 ); and, wherein both oil and air are vented outside said spherical end section ( 44 , 45 ) of said support element ( 42 , 43 ) through said groove shaped ventilation channel ( 57 , 59 ) and said central lubrication channel ( 58 ).