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An Experimental Study on the Improvement of Fuel Economy according to Coolant and Oil Temperature  

Cho, Won-Joon (Graduate School, Hanyang University)
Kim, Hyung-Ik (Graduate School, Hanyang University)
Lee, Ki-Hyung (Department of Mechanical Engineering, Hanyang University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.1, 2009 , pp. 72-79 More about this Journal
Abstract
Recently, the internal combustion engines have focused on reducing the $CO_2$ gas in order to cope with severe regulations for fuel economy. Therefore, various new technologies have been developed. Among them, cooling system is spotlighted because it has great effect on fuel economy. In this study, we measured the friction losses of engine parts according to engine speed and oil temperature. We also obtained optimized oil temperature which has the minimum friction losses. Then, we selected optimized oil temperature range and gave informations of friction losses for each engine parts. In addition, we analyzed relationship between coolant temperature and oil temperature by using engine performance test system. From this experiment, we obtained the database for relationship between coolant temperature and oil temperature. Then, we found the optimal temperature about engine oil. We analyzed BSFC and exhaust emissions by controlling the high coolant temperture. If we controlled coolant temperature more higher, BSFC has a little difference but exhaust emissions such as THC and CO have reduced. By using these experimental results, we predicted that IC engine have more low fuel consumption and exhaust emissions by optimized cooling control strategy.
Keywords
BMEP; BSFC; Power; Mass flow rate; Coolant temperature; Oil temperature; Frictional loss;
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  • Reference
1 D.C. Han and M. R. Cho, "Friction Characteristics of Direct Acting Type OHC Valve Train System," J. KSTLE, Vol.14, No.1, pp.23-27, 1998
2 J. M. Pieprzak, P. A. Willermet and D. Klassen, "A Tappet Rotation Monitor Based on Light Reflectance - Development and Functional Testing," SAE 890722, 1989
3 M. Hoshi, Recucing Friction Losses in Automobile Engines, Tribology International, 1984
4 J. T. Kovach and E. A. Tsakiris and L. T. Wang, "Engine Friction Reduction for Improved Fuel Economy," SAE 820085, 1982
5 M.R. Cho., D.Y. Oh and D.C. Han, "The Problem of Engine Friction Test by Strip Down Method," A. of KSME, Vol.26, No.11, pp.2429-2435, 2002
6 M.R. Cho, J.S. Kim, D.Y. Oh and D.C. Han, "The Effect of Additional Factors on the Engine Friction Characteristics," A. of KSME, Vol.26, No.10, pp.2159-2164, 2002
7 J. Choi, "Design Techniques of Lubricating System for Ultra Low Fuel Consumption Engines," Workshop of Gasoline Engines, Diesel Engines, Fuels & Lubricants Activities, pp.107-129, 1997
8 Y. Ogita, K. Niwa and T. Tanaka, "Measurement of Bearing Friction Loss Under Dynamic Load," SAE 880547, 1988