The experimental investigation on performance and emission characteristics of ceramic coated diesel engine using diesel and biodiesel

Abstract

In this study, the effect of diesel and biodiesel (Sesame oil methyl ester) blends on performance and exhaust emissions of a single cylinder, ceramic coated diesel engine were investigated. In this work, the piston crown and outer surface of the cylinder liner of a diesel engine was coated with the ceramic material Aluminum Titanate by plasma spray technique. Thus, a thermal barrier was provided to the parts of combustion chamber with this ceramic coating. Ceramic coatings applied to the combustion chamber of diesel engine are preferred to reduce the transfer of heat from the combustion chamber to the cooling system. The biodiesel (Sesame oil methyl ester) was initially prepared from sesame oil by transesterfication process. Then, it is blended with diesel to a suitable proportion of 10% and 20% by volume. In this investigation, the brake thermal efficiency for diesel in ceramic coated engine was found to be higher than the conventional diesel engine. The efficiency was improved by 1.77% compared to conventional diesel engine. The emissions like carbon monoxide and hydrocarbon except oxides of nitrogen were decreased due to complete combustion of the fuel in the thermally insulated combustion chamber of the LHR engine.NOX was found to be higher for LHR engine with diesel and biodiesel blends due to higher in-cylinder gas temperature as compared to the conventional diesel engine using diesel fuel.