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Effect of Fuel Characteristics on the Performances and Emissions of an Early-injection LTC / Diesel Engine
Technical Paper
2008-01-2408
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
New combustion processes like LTC (Low Temperature Combustion) that includes HCCI (Homogeneous Charge Compression Ignition), PCCI (Premixed Charge Compression Ignition), PPCI (Partial Premixed Compression Ignition)… are promising ways to reduce simultaneously NOx and PM. Nevertheless, these combustion processes can be used only on a limited part of the engine load and speed map. Therefore, it appeared interesting to assess how the fuel, through its characteristics, could enhance the operating range in such combustion processes. That was the aim of an international consortium carried out by IFP and supported by numerous industrial companies.
First a specific procedure has been developed to compare the different fuels on a early injection HCCI single cylinder engine. Then, using this procedure, a matrix of fuels having different cetane numbers (CN = 40-63), volatilities and chemical compositions has been tested. Their propensity to increase the operating range limited by some criteria like smoke, noise… has been measured and compared to a conventional EN590 Diesel fuel.
Using this methodology, it has been shown that a low CN fuel leads to a long auto ignition delay, which lets more time for the fuel vaporization process and, consequently, gives a better homogenization of the fuel, air and exhaust gases mixture. A high fuel volatility also favors the homogenization process. Moreover, it has been shown that in addition to these classical physical properties, the fuel composition highly impacts the combustion behavior and, therefore, noise and smoke emissions. For instance, it has been observed that an appropriate fuel combining all these parameters could improve the operating range of more than 30%.
These results are a first step in the definition and the validation of the Combustion Driving Concept: the way to obtain the optimum combustion development through the fuel formulation.
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Citation
Pesant, L., Forti, L., and Jeuland, N., "Effect of Fuel Characteristics on the Performances and Emissions of an Early-injection LTC / Diesel Engine," SAE Technical Paper 2008-01-2408, 2008, https://doi.org/10.4271/2008-01-2408.Also In
References
- Jeuland N. Montagne X. Duret P. “Engine and fuel related issues of gasoline CAI (Controlled auto-Ignition) combustion” SAE paper 2003-01-1856
- Stanglmaier R.H. Roberts C.E. “Homogeneous Charge Compression Ignition (HCCI): Benefits, Compromises, and future engine applications” SAE 1999-01-3682
- Walter B. Gatellier B. “Development of the high power NADI concept using dual mode diesel combustion to achieve zero NOx and particulate emissions” SAE 2002-01-1744
- Walter B. Gatellier B. “Near zero NOx emissions and high fuel efficiency Diesel engine: the NADI™ concept using dual mode combustion” Oil & Gas Science and Technology 58 1 101 114 2003
- Gatellier B. Ranini A. Castagné M. “New developments of the NADI concept to improve operating range, exhaust emissions and noise” Oil & Gas Science and Technology 61 1 7 23 2006
- Iwabuchi Y. Kawai K. Shoji T. Takeda Y. “Trial of new concept diesel combustion system - premixed compression-ignited combustion” SAE 1999-01-0185
- Jeuland N. Montagne X. Duret P. “New HCCI/CAI combustion process development: methodology for determination of relevant fuel parameters” Oil & Gas Science and Technology 59 6 571 579 2004
- Jeuland N. Montagne X. “New HCCI/CAI combustion process development: methodology for determination of relevant fuel parameters” Oil & Gas Science and Technology 61 1 85 94 2006
- Ryan T.W. III Matheaus A.C. “Fuel requirements for HCCI engine operation” SAE 2003-01-1813
- Kalghatgi G.T. Risberg P. Angström H.-E. “Advantages of fuels with high resistance to auto-ignition in late-injection, low-temperature, compression ignition combustion” SAE 2006-01-3385
- Kitano K. Nishiumi R. Tsukasaki Y. Tanaka T. Morinaga M. “Effects of fuel properties on Premixed Charge Compression Ignition combustion in a direct injection Diesel engine” SAE 2003-01-1815
- Alseda D. Montagne X. Dagaut P. “Homogeneous Charge Compression Ignition: Formulation effect of a Diesel fuel on the initiation and the combustion - Potential of acetals impact in a Diesel base fuel” SAE 2007-24-0018
- Gibbs G.J. Calcote H.F. “Effect of molecular structure on burning velocity” Journal of chemical and engineering data 4 3 1959
- Farrell J.T. Johnston R.J. Androulakis I.P. “Molecular structure effects on laminar burning velocities at elevated temperature and pressure” SAE 2004-01-2936
- Kawano D. Naito H. Suzuki H. Ishii H. Hori S. Goto Y. Odaka M. “Effects of fuel properties on combustion and exhaust emissions of Homogeneous Charge Compression Ignition (HCCI) engine” SAE 2004-01-1966
- Shibata G. Oyama K. Urushihara T. Nakano T. “Correlation of low temperature heat release with fuel composition and HCCI engine combustion” SAE 2005-01-0138