Design of Valve Train for Heavy Duty Application

Abstract

Today’s high speed and heavy-duty engine demands precise design and analysis of the various engine components. Amongst the various components, valve train of an Internal Combustion (IC) engine plays the crucial role. The components of valve train like camshaft, tappet, pushrod, rocker arm, valves etc. are subjected to inertia and vibrational forces. The valves are also subjected to thermal loads. These forces should be studied to make sure precise and controlled functioning of the valve train. The complex task of valve train system design and development can be achieved by theoretical and simulation analysis which considers mechanical, thermal and hydrodynamic factors. Different simulation tools are available for valve train kinematic analysis. This chapter describes about the methods of cam design, valve train layouts, theoretical analysis of valve train design and comparison with simulation results, tribology of valve train and experimentation of valve train.