Deterioration in Automobile Cams and Tappets

A paper was presented to the Automobile Division of the Institution of Mechanical Engineers in London, on 8th January, by Dr. It. Cazaud, Dipl.Eng., M. Renout, and C. Daubertes, Dipl.Eng. (all at Simea, France) entitled “Contribution to the Study of Deterioration in Automobile Engine Cams and Tappets”. The cam‐tappet wear problem has become very important in the past few years because of the continuous increase in maximum rotational speed of engines and it would seem that the ideal solution lies in decreasing the inertia forces by giving up the rocker system, and using the arrangement of the overhead camshaft acting directly on the valve stem.