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Utilizing FAME as a Cetane Number Improver for a Light-duty Diesel Engine
Technical Paper
2014-01-1392
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
As the petroleum depletion, some of this demand will probably have to be met by increasing the production of diesel fuels from heavy oil or unconventional oil in the near future. Such fuels may inevitably have a lower cetane number (CN) with a higher concentration of aromatic components. The objective of the present research is to identify the effects of a typical biodiesel fuel as a CN improver for a light-duty diesel engine for passenger cars.
Our previous study indicates that methyl oleate (MO), which is an oxygenated fuel representative of major constituents of many biodiesel types, can reduce soot and NOx emissions simultaneously by optimizing performance under exhaust gas recirculation (EGR) when used as a diesel fuel additive. In addition, it was found that MO tends to reduce the ignition delay.
We employed a 2.2 L passenger car DI diesel engine complying with the Euro 4 emissions regulation. Four different fuels were compared: JIS#2 diesel fuel, which has a CN of 57 (D100) for a reference fuel, a very low CN diesel fuel (CN45), a blend of CN45 with 40% MO (named CN45+MO), and a blend of CN45 with an alternative CN improver, 2-Ehtyl-Hexyl-Nitrate (EHN), which has the same CN as D100 (named CN45+EHN). These fuels were compared in terms of their thermal efficiency, combustion and exhaust emission characteristics.
Experiments were performed using seven engine torque and speed combinations that were selected to reflect typical operating conditions in passenger car diesel engines, focusing on the effects of important parameters such as pilot injection, injection pressure, EGR ratio and the use of premixed charged compression ignition (PCCI).
The engine test results showed that CN45 generated longer ignition delays than the other tested fuels under all operating conditions and that pilot injection with this fuel was not sufficient to ensure ignition and effective main combustion at low engine speeds and loads, particularly when using high EGR ratios. This increased fuel consumption and unburned fuel emissions (CO & THC). It was judged that too much amount of MO must be added to improve the deterioration brought by CN45. We therefore compared the performance of CN45+MO to that of CN45+EHN under low temperature and enhanced EGR conditions. CN45+MO produced lower soot and NOx emissions. In addition, the brake specific energy consumption (BSEC), defined on an energy basis, for CN45+MO did not differ significantly from those for CN45+EHN or D100. These effects are due to the enhancement of low temperature reactions brought by oxygenated fuels such as MO. Moreover, MO can reduce maximum pressure rise rates associated with engine noise and vibration observed in case of CN45.
In summary, MO is a useful CN improver for light-duty diesel engine.
Authors
Topic
Citation
Cui, X., Lu, P., Nakamura, H., Matsunaga, M. et al., "Utilizing FAME as a Cetane Number Improver for a Light-duty Diesel Engine," SAE Technical Paper 2014-01-1392, 2014, https://doi.org/10.4271/2014-01-1392.Also In
References
- Japan Petroleum Energy Center http://www.pecj.or.jp/japanese/jpecnews/jpecnews_H19.html 2009 11
- Ladommatos N. , Parsi M. and Knowles A. The effect of fuel cetane improver on diesel pollutant emissions Fuel 75 1 8 14 1996
- chaluvadi Nihanth , Vijay P. , Puli R. , dadi Yogeswar , Pavan CH. V. V. N. Diesel Engine Performance Improvement by Using Cetane Improver International Journal of Engineering and Innovative Technology 2 10 179 182 2013 4
- Shudo T. , Nakajima T. , Ogawa H. and Suzuki K. Combustion Control by Pilot Fuel Injection for Utilizing Low Cetane Number Fuels in Diesel Engines The Japan Society of Mechanical Engineers 73-733 180 186 2007 9
- Rode A. B. , Chung K. , Kim Y. and Hong I. S. Synthesis and Cetane-Imroving Performance of 1,2,4,5-Tetraoxane and 1,2,4,5,7,8-Hexaoxonane Derivatives Energy Fuels 2010 24 1636 1639 2010 10
- Salooja , K. C. The Role of Combustion Promoters J. Inst. Petroleum 48 460 119 129 1962
- Hashimoto K. , Akutsu Y. , Arai M. and Tamura M. Chemical Reaction Mechanism of Cetane Number Improving Agents Sekiyu Gakkaishi 41 5 341 1998
- Cui , X. , Kim , T. , Fujii , Y. , Kusaka , J. et al. The Effects of Jatropha-derived Biodiesel on Diesel Engine Combustion and Emission Characteristics SAE Technical Paper 2012-01-1637 2012 10.4271/2012-01-1637
- United States Environmental Protection Agency 2002 A Comprehensive Analysis of Biodiesel Impacts on Exhaust Emissions Draft Technical Report, EPA420-P-02-001
- Cui X. , Kim T. , Fujii Y. , Kusaka J. , Daisho Y. Effects of Biodiesel on Diesel Engine Combustion and Emission Characteristics - Detailed Combustion and Chemical Kinetic Analyses Transactions of Society of Automotive Engineers of Japan 44 2 311 318 2013 3
- Yoshimoto Y. , and Kinoshita E. Applied technology of vegetable oils for diesel engines - use of biodiesel fuel Journal of the Combustion Society of Japan 51 156 2009 121 128
- Carlucci P. , Ficarella A. , and Laforgia D. Effects of pilot injection parameters on combustion for common rail diesel engines SAE transactions 2003 112 932 943
- Wang X. , Kuti Z. H, O. A. , Zhang W. , and Nishida K. Experimental and analytical study on biodiesel and diesel spray characteristics under ultra-high injection pressure International Journal of Heat and Fluid Flow 31 2010 659 666
- Nakakita K. , Kondoh T. , and Watanabe S. A study on diesel combustion with high-pressure fuel injection (improvement of combustion and exhaust emissions using small-hole-diameter nozzles) The Japan Society of Mechanical Engineers 60-577 1994 1999 254 262
- Suzuki M. , Nishida K. , and Hiroyasu H. Mixture formation process in a diesel spray with high injection pressure (behavior of spray injected into a model combustion chamber) The Japan Society of Mechanical Engineers 60-569 1994 2001 327 334
- Maiboom A. , Tauzia X. , and Hetet J. F. Experimental study of various effects of exhaust gas recirculation (EGR) on combustion and emissions of an automotive direct injection diesel engine Energy 33 2008 22 34
- Szybist James P. , Boehman Andre L. , Taylor Joshua D. , and McCormick Robert L. Evaluation of formulation strategies to eliminate the biodiesel NOx effect Fuel Processing Technology 86 2005 1109 1126
- Reid R. C. , and Prausnitz J. M. The properties of gases and liquids McGRAW-HILL, Inc. 4th 1987
- Tanaka S. A Chemical Kinetics Study of Fuel Effects on HCCI Combustion PhD Thesis Waseda University 2004
- http://www.enecho.meti.go.jp/hinnkakuhou/data/anzenbdf.pdf
- Cui X. , Zhou B. , Matsunaga M. , Fujii Y. , Kusaka J. , Daisho Y. A Numerical Study of the Effects of FAME Blends on Diesel Combustion and Emissions Characteristics Using a 3-D CFD Code Combined with Detailed Kinetics and Phenomenological Soot Formation Models SAE International, 2013-01-2689
- Cheng A. S. , Upatnieks A. , and Mueller C. J. Investigation of the impact of biodiesel fuelling on NOx emissions using an optical direct injection diesel engine Int. J. Engine Res. 2006 8 1 297 318
- Matsumoto Y. , Cui X. , Daisho Y. , Nishio Y. , Murata Y. , Koubayashi T. and Kimura T. The Effect of In-cylinder EGR Gas Stratification on Diesel Emission The 20 th Internal Combustion Engine Symposium 2009 97 102
- Ladommatos , N. , Abdelhalim , S. , Zhao , H. , and Hu , Z. Effects of EGR on Heat Release in Diesel Combustion SAE Technical Paper 980184 1998 10.4271/980184
- Johnson , Rodney A Fundamental Study of the Oxidation Behavior of SI Primary Reference Fuels with Propionaldehyde and DTBP as an Additive PhD diss. Drexel University 2008
- Murata Y , Nishio Y , Kusaka J , Daisho Y , Kawano D , Suzuki H , Ishii H , and Goto Y Numerical Analysis of Miller-Premixed Charge Compression Ignition Combustion on a Dynamic-T Map IMechE 2010 Int. J. Engine Res. 11 89 98
- Hisadome Y. , Ohkubo T. , Cui X. , Matsumoto Y. , Fujita S. , Daisho Y. , Ohashi T. and Takabayashi T. The Effect of Use of Biodiesel Fuel on Diesel Emission Transactions of Society of Automotive Engineers of Japan 42 2 March 2011 527 532
- Cui X. , Kiyomatsu M. , Touma K. , Hisadome Y. , Kusaka J. , and Daisho Y. The Effects on Diesel Engine Combustion and Emission Characteristics by Using Biodiesel 2011 JSAE Annual Congress (Autumn), 131-20115585