VELVE GEAR OF AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a valve gear of an internal combustion engine, said valve gear comprising a gas exchange valve (11) and a valve actuating element (4) provided with a contact surface (8) for a front surface (9) on a valve rod (10) of the gas exchange valve (11) actuated by the valve actuating element (4) in the opening and closing direction. According to the invention, the contact surface (8) and/or the front surface (9) are provided with a wear protection layer (12) consisting of at least one metal-free amorphous hydrocarbon layer containing sp2- and sp3- hybridised carbon.