Internal combustion engine

摘要

Two or more valves which are positioned opposite one another relative to a center plane in which the cylinder axis and the crankshaft axis are located and which are arranged in the cylinder head in a parallel, upright position, are actuated via separate cams and levers by a camshaft which is spaced from the center plane and extends in parallel with the crankshaft. The lever actuating the valve on the same side of the center plane as the camshaft is configured as a one-armed lever which is positioned underneath the camshaft and is supported by a bearing on the cylinder head. The lever actuating the valve on the other side of the center plane is configured as a rocker lever, its axle being situated above the one-armed lever, parallel to the camshaft. The compact and rigid design of the valve gear achieved in this manner is particularly well suited for four-valve arrangements, permitting the one-armed levers together with the corresponding cams to be positioned between the rocker levers and their cams (relative to a cross-plane of each cylinder).