Ventilbetätigungsmechanismus für eine Brennkraftmaschine

摘要

A valve actuating mechanism for the inlet valves (E) of a cylinder of an internal combustion engine has first drag levers (6), each operating an inlet valve (E) and actuated by a cam (2, 3 or 4), for a lower rotation speed range, and second drag levers (9) which are arranged between adjacent first drag levers (6) and actuated by their own identical cams (8) for the upper rotation speed range. The second drag levers (9) are interconnected by a cross-member (10). The first drag levers (6) contain radially movable pistons (12) which are pushed outwards in the upper rotation speed range by a pressurized medium and on which the cross-member (10) of the second drag levers (9) can be supported. The valves (E) are thus actuated by the second drag levers (9) according to the contour of the cams (8).