Internal combustion engine for vehicle or aircraft - has camshaft driven directly by crankshaft via gears, camshaft also being output shaft

摘要

The engine has a crankshaft (1) used to drive a camshaft (2), which rotates at half its speed. The camshaft is the output shaft, and can support the maximum engine performance acting on the crankshaft. The cross-sectional area of the camshaft is greater than that of the crankshaft, and the drive is transferred to the camshaft via a gear or gears (4,5), or via a pulley and chain belt. At least one of the bearings (7) supporting the camshaft is a tapered roller bearing.