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

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 (Al2O3) 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.

[1]  Nicolas Jeuland,et al.  Potentiality of Ethanol As a Fuel for Dedicated Engine , 2004 .

[2]  M. Al-Hasan.  Effect of ethanol-unleaded gasoline blends on engine performance and exhaust emission , 2003 .

[3]  Fikret Yuksel,et al.  The use of ethanol–gasoline blend as a fuel in an SI engine , 2004 .

[4]  G. Woschni.  A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine , 1967 .

[5]  Siew Hwa Chan,et al.  Performance and emissions characteristics of a partially insulated gasoline engine , 2001 .

[6]  Hakan Bayraktar,et al.  Experimental and theoretical investigation of using gasoline–ethanol blends in spark-ignition engines , 2005 .

[7]  B. Nagalingam,et al.  Performance of Thin-Ceramic-Coated Combustion Chamber with Gasoline and Methanol as Fuels in a Two-Stroke SI Engine , 1994 .

[8]  Imdat Taymaz,et al.  The effect of thermal barrier coatings on diesel engine performance , 2007 .

[9]  K. Z. Mendera.  Effects of plasma sprayed zirconia coatings on diesel engine heat release , 2000 .

[10]  J. Yamin,et al.  THE EFFECT OF COMBUSTION DURATION ON THE PERFORMANCE AND EMISSION CHARACTERISTICS OF PROPANE-FUELED 4-Stroke S. I. ENGINES , 2003 .

[11]  John B. Heywood,et al.  Internal combustion engine fundamentals , 1988 .

[12]  Hakan Bayraktar,et al.  Theoretical investigation of flame propagation process in an SI engine running on gasoline–ethanol blends , 2007 .

[13]  H. Ricardo.  The High-Speed Internal-Combustion Engine , 1968 .

[14]  Dennis N. Assanis,et al.  The effect of thin ceramic coatings on spark-ignition engine performance , 1990 .

[15]  I. H. Garbie,et al.  Complexity Analysis of Industrial Organizations Based on a Perspective of Systems Engineering Analysts , 2011 .

[16]  M. A. Ceviz,et al.  Effects of ethanol–unleaded gasoline blends on cyclic variability and emissions in an SI engine , 2005 .