American Journal of Mechanical Engineering
ISSN (Print): 2328-4102 ISSN (Online): 2328-4110 Website: Editor-in-chief: Kambiz Ebrahimi, Dr. SRINIVASA VENKATESHAPPA CHIKKOL
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American Journal of Mechanical Engineering. 2015, 3(4), 122-125
DOI: 10.12691/ajme-3-4-3
Open AccessArticle

Performance Evaluation of Spark Ignition Engine at Constant Load Using Ethanol as Doping Agent

J.O Azubuike1, and O.M.I Nwafor1

1Mechanical Engineering Department, Federal University of Technology, Owerri.Imo State Nigeria

Pub. Date: August 05, 2015

Cite this paper:
J.O Azubuike and O.M.I Nwafor. Performance Evaluation of Spark Ignition Engine at Constant Load Using Ethanol as Doping Agent. American Journal of Mechanical Engineering. 2015; 3(4):122-125. doi: 10.12691/ajme-3-4-3


This project work is significant globally as the world is raising concern on global environmental challenges seen in recent times. Just of recent, the president of Nigeria Dr. Goodluck Jonathan was at UN Convention held at Geneva to join in world to deliberate on sustainable Energy and global warming issues. One critical source of environmental pollution is found to be associated with S.I. Engines running on Leaded Petrol. This Leaded Petrol contains Lead Compound known as Tetra Ethyl Lead (TEL) which gives out a poisonous substance. TEL is known with its ability to resist knock and raise octane rating. This paper examines the effect of replacing poisonous lead use as anti-knock agent with alcohol. The sources of alcohol in Nigeria are numerous and includes Woodchips which is non-edible Lignocelluosic Biomass. Alcohol obtained from these sources was blended with Petrol at different Blend ratio of 5% 10%, 15%, 20%, 30% and 40%. The purpose of blending is to obtain an optimum anti-knock blend ratio resulting to satisfactory engine operations. Alcohol is a renewable energy which is environmentally friendly. The test run of the blends was made on S.I Engine. The Engine Performance was evaluated at full-load condition. The results show that at full load, 20/80 ethanol/petrol blend gave the optimum engine performance.

brake power BSFC fuel consumption thermal efficiency

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[1]  API (1980) Manual of Petroleum Measurement Standard Chapter 11.1 Volume xixii Adjunt to ASTMD 1250-80.
[2]  Appendix B, Transportation Energy Data Book: Centre for Transportation Analysis Oak Ridge National Laboratory.
[3]  Black Market Britain: Fake Fuel BBC New 2004-06-09, Retrieved 2008-04-16.
[4]  David M Mousdale (2008) “Biofuels Biotechnology Chemistry and Sustainable Development. CRC Press in an Imprint of Taylor and Francis Group.
[5]  Dietmar Seyferth, 2003 “The rise and fall of Tetrathyllead2organometallics.
[6]  Drum K (2013): America’s real Criminal Element Lead Mother Jones.
[7]  GM Engineers Discovers that Lead Gas Reduce (2014): The History Channel Website. Retrieved 11:24 September 12 hpptt//
[8]  Gasoline Gallon Equivalent (GGE) Definition “Energy Gov Retrieved 12 October 2014.
[9]  IEA 2004 Biofuel for Transport: An International Perspective Interview by International Energy Agency. Source: Accessed 14 October, 2014.
[10]  J.L Kitman (2000) The Secret History of Lead: The Nation March 20, 2000 on
[11]  Kerr Jim (2008) “Lost of Intrigue Behind Olds, Starting Woes” Winnipeg Free Press Retrieved 13 June 2014.
[12]  Kovarik Bill and C.F Kettering (1921) “Discovery of Tetrarethl Lead in the context of Technological Alternative”. Society of Automobile Engineers, fuels and Lubricant Conference Beltimore Maryland.
[13]  Lim Y and S. Tanaka (2006) “Ethanol Fermentation from Biomass Resources: Current State and Prospects. Applied Microbiology Biotechnology Page 627-642.
[14]  National Research Council (1981) “Feeding Value of Ethanol Production”.National Academy Press Washington D.C. USA.
[15]  Nwakaire J.N, S.L Ezeoha and B.O Ugwuishiwu (2003) “Production of Cellulosic Ethanol from Wood Sawdust” Agric Eng Int: CIER Journal 15 (3) 6-140.
[16]  Nwafor,O.M.I 2004. “Emission Characteristics of Diesel Engine Operating on Rapeseed Methyl Ester.” International Journal of World Renewable Energy 29 (1) 119-129.
[17]  O.C Nwufo, C.F Nwaiwu,J.O Igbokwe and O.M.I Nwafor (2014): Production and Characterisation of Bio-ethanol from various Nigerian Feedstocks.
[18]  R.C Dubey (2004) “A Textbook of Biotechnology” S. Chand and Company Ltd 7361 Ram Najar New Delhi.
[19]  Taylor and Francis (2009) Journal of Wood Chemistry and Technology Volume 30.