CONTROL OF EXHAUST EMISSIONS OF CI ENGINE

Compression ignition (CI) engines run efficiently with alcohols and vegetable oils. However, alcohols due to low ignitions characteristics and vegetable oil with high viscosity cause problems of combustion in CI engines. The drawbacks associated with these fuels call for semi adiabatic diesel engine (SADE). The advantages of high volatility of alcohol and high Cetane number and calorific value of vegetable oil can be taken into consideration if their fuels are used in SADE. CI engines emit particulate matter (PM) and oxides of nitrogen (NOx). Inhaling of these pollutants affect the human health apart from causing environment disorders. Hence, products of exhaust are to be addressed. Tests were aimed in controlling products of exhaust on SADE with air gap insulated piston and air gap insulated liner with varied air gap thickness with carbureted C2H5OH and cottonseed oil at different injection pressures. The PM and NO x were determined by using sophisticated analyzers. The SADE with carbureted C2H5OH and cottonseed oil decreased the product of exhaust with respect to diesel fuel on base engine.