Author(s): A.R. Surendar, A. Siddharth Rathan Kumar, M Vinoth, T. Senthilkumar

Abstract: Increased utilization of conventional fossil fuels has urged the development of alternative power sources, also along with it the IC engines have been developing with advanced combustion techniques. One such is the relatively new Homogeneous charge compression ignition (HCCI) engine technology whichis a combination of gasoline and diesel engines, capitalizing on the advantages of high engine efficiency and low emissions levels.This paper describes about history of origin, research works and the working process of HCCI engines along with its advantages.Also the problems and limitations in using HCCI engines and different strategies and methods to be adopted to resolve them are discussed.