Performance and emission characteristics of a low heat rejection spark ignited engine fuelled with E20

• Published in: Journal of mechanical science and technology Vol. 26; no. 4; pp. 1241 - 1250
• Main Authors: Ramesh Kumar, C., Nagarajan, G.
• Format: Journal Article
• Language: English
• Published: Heidelberg Korean Society of Mechanical Engineers 01.04.2012; Springer Nature B.V; 대한기계학회
• Subjects: Analytical and numerical techniques; Applied sciences; Atmospheric pollution; Combustion; Combustion chambers; Control; Devices using thermal energy; Dynamical Systems; Emissions control; Energy; Energy. Thermal use of fuels; Engineering; Engines; Engines and turbines; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Heat exchangers (included heat transformers, condensers, cooling towers); Heat transfer; Industrial and Production Engineering; Internal combustion engines: gazoline engine, diesel engines, etc; Mechanical Engineering; Mechanical engineering. Machine design; Physics; Pollution; Pollution sources. Measurement results; Reduction; Rejection; Thermal barrier coatings; Thermal insulation; Vibration; 기계공학; Emission; SI engine; E20; Combustion; LHR; Cylinder head; Intake valve; Exhaust valve; Cooling; Performance characteristic; Thermal insulation; Heat flow; Diesel engine; High temperature; Experimental study; Thermal barrier; Heat engine; Combustion chamber; Cooling system; Thermal barrier coatings; Internal combustion engine; Fuel mixture; Heat transfer
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-012-0206-0

In internal combustion engines, the concept of low heat rejection (LHR) using thermal barrier coating on the surface of combustion chamber is gaining attention. Thermal barrier coating reduces the heat transfer to the cooling system, protects engine components from peak heat flux and fluctuating temperature produced during combustion and improves the performance of the engine. Information in the literature is plentiful for LHR diesel engine and only few studies exist on LHR spark ignited engine. The application of thermal barrier coating in spark ignited engine is limited by pre-ignition and knocking due to elevated combustion chamber temperature. A spark ignited engine with moderate insulation on the combustion chamber and higher octane fuel can overcome this difficulty. The objective of the present experimental study is to quantify the changes in performance and emission characteristics brought by partial thermal insulation on the combustion chamber of a four stroke spark ignited engine fueled with E20 blend. Partial thermal insulation was created by coating 0.3 mm thick Alumina (Al 2 O 3 ) on the cylinder head, inlet and exhaust valves. The changes are quantified with respect to unmodified engine fueled with gasoline. The combustion parameters such as flame development and rapid burn duration are also estimated and compared. The results indicate that partially insulated SI engine when fueled with E20 improves performance and reduces emission. A maximum of 48% reduction in THC and 50% reduction in CO emission at part load was achieved.