Volume No. 7 Issue No.: 1A Page No.: 523-529 July-September 2012

 

EVALUATION OF ENGINE PERFORMANCE AND EMISSION CHARACTERISTICS OF ZIRCONIA COATED PISTON SURFACE IN SI ENGINE

 

Senthilkumar Tamilkolundu* and Kumara Gurubaran Balasubrmanian

Department of Automobile Engineering, Anna University of Technology, Tiruchirappalli (INDIA)

 

Received on : May 25,2012

 

ABSTRACT

 

The efficiency and fuel economy of the engine primarily depends on the working of the piston. Better efficiency and fuel economy of SI engine can be achieved by insulation of the combustion chamber components to reduce heat rejection using the technique of coating the engine components. However, such insulation will also increase the operating temperature of the piston surface. Since existing ring or liner materials cannot withstand these higher operating temperatures, alternatives are needed for this critical tribological interface. In SI engines, thermal barrier coating like Zirconia have been employed to improve fuel efficiency to reduce corrosion of piston, reduce pollution, low fuel consumption and improve lubrication oil life. The insulated engines have attractive emission characteristics due to the more complete combustion in the insulated configurations. These investigations to evaluate the performance and emission characteristics of the Yttria zirconia coated piston in the multi cylinder petrol engine are presented. Test results indicate that coatings on the piston produced a reduction in fuel consumption while coatings on the piston surface were more effective in reducing heat rejection and achieve better emission charaterstics when compared to base line test results.

 

Keywords : Thermal Barrier Coating, SI engine, Engine performance, Heat rejection, Engine emissions

 

 

BACK