The Influence of Variable Valve Timing System over Internal Combustion Engine’s Performances

Abstract

This article presents the influence that variable valve timing system manifests on the internal combustion engine’s performance and environmental parameters. By modifying the moment of opening and closing the valves, earlier or later in comparison with the classical valve timing system, combined with a modified overlap, exhaust gas emission, engine torque, specific fuel consumption, and pumping loses are optimized so that the engine becomes “friendlier” to the environment. At the end of the article, the conclusion is presented.