EFFECT OF FUEL TYPE AND ENGINE PARAMETERS ON PERFORMANCE AND EMISSION CHARACTERISTICS OF A SPARK IGNITED DIRECT INJECTION ENGINE

The stricter worldwide emission legislation and growing demand of efficient vehicles having lower specific fuel consumption with greatly improved power requires significant effort. An important factor to determine the Emission and Performance factor of an Engine is the Fuel Injection System. This has led to the improvement of this technology from the carburettor to the port Injection and finally to the direct injection engine. The Direct Injection Spark Ignition Engine has been tested with variety of fuels such as bio-diesel, blends of ethanol and gasoline, LPG, CNG etc. The study is based on the comparison of emissions such as NOx and CO as well as the performance parameters of the engine such as BSFC. The reviewer will also get information about the change in the engine performance and emission characteristics when important engine parameters are varied. Recent research and development has shown that SI direct injection engines, coupled with optimal conditions can provide much better performance and emission characteristics than the conventional SI engines. This paper provides a comprehensive review of the technical optimality of a direct injection SI engine by suggesting optimum fuel type and engine parameters.