Abstract: The invention relates to a valve train for gas exchange valves of an internal combustion engine, having a base camshaft, a plurality of cam carriers, which are arranged in a rotationally fixed and axially movable way on the base camshaft, as well as stopping devices for retaining the cam carriers in defined displacement positions along the base camshaft, with the stopping devices comprising in each case a pressure-applying element, which is inserted into a recess of the base camshaft and pressed in the radial direction of the base camshaft against an opposite inner circumferential section of the cam carrier. In order to counteract noise generation in the valve train, a first variant of the invention provides an additional pressure-applying element at an axial distance from the pressure-applying element. This additional pressure-applying element is pressed against an opposite inner circumferential section of the cam carrier.

Abstract: The invention relates to a valve train for gas exchange valves of an internal combustion engine, having a base camshaft, a plurality of cam carriers, which are arranged in a rotationally fixed and axially movable way on the base camshaft, as well as stopping devices for retaining the cam carriers in defined displacement positions along the base camshaft, with the stopping devices comprising in each case a pressure-applying element, which is inserted into a recess of the base camshaft and pressed in the radial direction of the base camshaft against an opposite inner circumferential section of the cam carrier. In order to counteract noise generation in the valve train, a first variant of the invention provides an additional pressure-applying element at an axial distance from the pressure-applying element. This additional pressure-applying element is pressed against an opposite inner circumferential section of the cam carrier.

Abstract: In a valve spring retainer plate for supporting the spring forces of closing springs acting upon gas exchange valves in the valve operation of internal combustion engines having a reinforcement member of a material of lower strength and an annular supporting member of a material of higher strength being positioned between the reinforcement member and the closing spring, it is proposed that the supporting member for simplifying the manufature and the premounting merely is maintained on the reinforcement member by friction fit.