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A New Strategy to Achieve Radical Combustion Through Exhaust Port Throttling for Two Stroke Engine
Saqaff Ahmed Alkaff , Mohamed Khan
Pages - 139 - 148     |    Revised - 30-04-2010     |    Published - 10-06-2010
Volume - 4   Issue - 2    |    Publication Date - May 2010  Table of Contents
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KEYWORDS
Spark Ignition Combustion. , , , Two Stroke Engine, Radical Combustion, Exhaust Port Throttling, Trial Plates for Throttling Control
ABSTRACT
Radical combustion is a critical condition behind control. In two stroke engine, condition of radical combustion could be achieved through control of the trapped exhaust gases at a certain condition, might be include the engine load, speed, concentration of the unburned hydrocarbons, their temperature and other operational parameters. An earlier work was conducted towards the achievement of the radical combustion. The exhaust gases were controlled, using a throttling mechanism just at the exhaust port opening. The mechanism was made to throttle the opening of the exhaust port at a range of 1% to 8 % [1]. However several difficulties were faced, mainly with the control mechanism of throttling. In addition the complexity in identifying the critical conditions at which the radical combustion could be achieved. In this paper, a new strategy was used to control the exhaust port throttling in a way to manage the amount of exhaust gases trapped and avoiding the drawbacks of the throttling mechanism in the earlier work.. Three trial plates were used, one-sixth closed, one-third closed and half closed to throttle the exhaust gases leaving the combustion chamber. Investigating of the engine running, incorporated with this new strategy of exhaust port throttling (throttling control at the exit of the exhaust port) leads to several interesting results about the criticality and conditions at which radial combustion is occurring. Results reveal the possibility of achieving radical combustion, when using the one-sixth closed plate under relatively higher load. Therefore, partial trapping of the exhaust gases should be carried, through restriction of the opening of the exhaust port not exceed 15% of port exit area. However it is more interesting, that throttling of the exhaust for two stroke engines have clear effect on the quality and stability of the combustion and hence its direct effect on the fuel consumption and the rate of pollutants expelled to the environment.
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1 G.P. Huffman, F.E. Huggins, Naresh Shah and Anup Shah. “Behavior of basic elements during coal combustion”. Progress in Energy and Combustion Science, Volume 16, Issue 4, Pages 243-251, 1990.
2 John M. Simmie . “Detailed chemical kinetic models for the combustion of hydrocarbon fuels”. Progress in Energy and Combustion Science, Volume 29, Issue 6,Pages 599-634; 2003.
3 B. Lewis and G. Von Elbe.” Combustion, Flames And Explosions Of Gases” , Academic Press, New York, (1951).
4 John B. Heywood. “Internal Combustion Engines Fundamentals”. Mc-Graw hill Publishing Company. (1988).
5 Stone Richard. “ Introduction to internal combustion”. Mac Millan Publisher Ltd.; London (1985).
6 Kito, S., Wakai, K., Takahashi, S. and Komori, K. "Ignition Limit of Lean Mixture by Hydrogen Flame Jet Ignition." Proceedings of 15th Internal Combustion Engine Symposium; in Seoul, pp.233-238(1999).
7 Takeharu Hasegawa . ”Gas Turbine Combustion and Ammonia Removal Technology of Gasified Fuels”. Energies Journal , Volume 3, Issue 3. 335-449; 2010.
8 Semin ; Abdul Rahim Ismail and Rosli Abu Bakar. “ Combustion Temperature Effect of Diesel Engine Convert to Compressed Natural Gas Engine “. American Journal of Engineering and Applied Sciences . Vol: 2 Issue: 1; P 212-216;.2009.
9 Catania, A.E., D. Misul, E. Spessa and A. Vassallo. “ Analysis of combustion parameters and their relation to operating variables and exhaust emissions in an upgraded multivalve bi-fuel CNG SI engine”. SAE Paper No. 2004-01-0983;2004.
10 E. I. Zabryanskii1 and V. P. Grebenshchikov. “Combustion temperatures of hydrocarbons and fuels” . Journal Chemistry and Technology of Fuels and Oils . Springer New York. P. Volume 8, Number 2;. P. 138-140;1972.
11 Ming Jia and Maozhao Xie . “A chemical kinetics model of iso-octane oxidation for HCCI engines.” Fuel Journal, volume 85(17–18) 2593–2604;2006.
12 Wakai, K., Shimizu, S., Fuma, H., Hirata T. and Taniguchi, H. "Study on the combustion in a Divided Chamber (Ignition Mechanism of Main Chamber Mixture)." Transaction of JSME (Section B) , 51-465, pp.1600-1609;1985.
13 Kuo, Kenneth K. “ Principles Of Combustion” . John Wiley & Sons, Inc., New York, (1986).
14 Spalding, D.B. “ Combustion and Mass Transfer”. Pegamon Press, New York, (1979).
15 Y. Ishibashi. “Basic understanding of activated radical combustion and its two-stroke engine application and benefits”. SAE paper 2000-01-1836;2000.
16 H. Zhao, J. Li, T. Ma and N. Ladommatos, “Performance and analysis of a 4-stroke multi-cylinder gasoline engine with CAI combustion”. SAE paper 2002-01-0420; March 2002
17 Q J. . Allen, D. Law. “Variable valve actuated controlled auto-ignition: speed load maps and strategic regimes of operation”. SAE paper 2002-01-0422 ; March 2002.
18 Steven Ashley. “A Radical Way to Burn”. Mechanical Engineering Journal. P.64-67; 1996.
19 Alkaff S. A, Ahmed Suhimi and, Hakim A Abbass. “ Radical Combustion for Two Stroke Spark Ignition Engines”. Bureau of Research and Consultancy (BRC) Seminar. MARA University Technology (UITM), Shah Alam, Malaysia, 1998.
20 Alkaff S. A, Ahmed Suhimi and, Hakim A Abbass. “Radical Combustion in Two Stroke (SI) Engines, Performance and Exhaust Emissions”. Bureau Of Research And Consultancy Journal, UiTM Malaysia.1, 11-24,1999.
21 y. ohyama. “Engine Control Using Combustion Model” . International Journal of Automotive Technology, Vol. 2, No. 2, pp. 53?62 (2001)
22 Soek Woo Kim and Yasuo Moriyoshi .”Analysis of Compression Ignition Combustion in Schnurle-Type Gasoline Engine”. KSME International Journal Vol: 18; No. 8, P. 1451-1406; 2004.
23 P. Amneus, D. Nilsson, F. Mauss, M. Christensen and B. Johansson. “ Homogeneous Charge Compression Ignition Engine”. The fourth International Symposium COMODIA 98; P. 567-572;1998.
24 Wijesinghe and G Hong. “Study of the auto-ignition combustion operating region of a small two-stroke engine”. Proc. IMechE Vol. 223 Part D: J. Automobile Engineering; P 651.659 2009.
25 Shunsuk Hashimoto, Yasunori Amino, Koji Yoshida, Hideo Shoji and Atsushi Saima. “ Analysis of OH Radical Emission Intensity during Auto ignition in a 2-Stroke Engine”. The fourth International Symposium COMODIA 98. P 405-410;1998.
26 Alkaff S. A, Ahmed Suhimi and, Hakim A Abbass.” Radical combustion. New concept for two stroke (SI) engines” . ASEAN Journal On Scientific and Technology for Development Singapore. 17 (2) :91-99, 2000.
27 V.Ya. Basevich. “Chemical kinetics in the combustion processes: A detailed kinetics mechanism and its implementation”. Progress in Energy and Combustion Science, Volume 13,Issue 3, Pages 199-248, 1987.
28 Noorfidza Yub Harun; M.T. Afzal and Noorliza Shamsudin. “ Reactivity Studies of Sludge and Biomass Combustion”. International Journal of Engineering (IJE), Volume (3) : Issue(5). P 413-426. November 2009
Mr. Saqaff Ahmed Alkaff
- Yemen
saqaff@yemen.net.ye
Mr. Mohamed Khan
- Yemen