A camshaft

摘要

A composite camshaft for use in an internal combustion engine comprises a tubular steel shaft 1 and a plurality of cams 31-38 mounted on the shaft. The shaft has a plurality of circumferentially spaced longitudinally extending grooves or projections 11-14 which in number are equal to or less than the engine cylinders. Every cam is identically shaped to have at least one projection or groove 30 in its inner periphery for co- operation with one of the grooves or projections of the shaft. The projection or groove 30 is angularly spaced by a preselected angle ??? from a symmetrical centre-line of the cam, passing through the cam nose, the preselected angle being one half of an angle ??? defined between the case noses of a pair of inlet and exhaust cams.