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Performance Evaluation and Optimization of Diesel Fuel Properties and Chemistry in an HCCI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published November 02, 2009 by SAE International in United States
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The nine CRC fuels for advanced combustion engines (FACE fuels) have been evaluated in a simple, premixed HCCI engine under varying conditions of fuel rate, air-fuel ratio, and intake temperature. Engine performance was found to vary mainly as a function of combustion phasing as affected by fuel cetane and engine control variables. The data was modeled using statistical techniques involving eigenvector representation of the fuel properties and engine control variables, to define engine response and allow optimization across the fuels for best fuel efficiency.
In general, the independent manipulation of intake temperature and air-fuel ratio provided some opportunity for improving combustion efficiency of a specific fuel beyond the direct effect of targeting the optimum combustion phasing of the engine (near 5 CAD ATDC). High cetane fuels suffer performance loss due to easier ignition, resulting in lower intake temperatures, which increase HC and CO emissions and result in the need for more advanced combustion phasing. The FACE fuels also varied in T90 temperature and % aromatics, independent of cetane number. T90 temperature was found to have an effect on engine performance when combined with high cetane, but % aromatics did not, when evaluated independently of cetane and T90.
CitationBunting, B., Eaton, S., and Crawford, R., "Performance Evaluation and Optimization of Diesel Fuel Properties and Chemistry in an HCCI Engine," SAE Technical Paper 2009-01-2645, 2009, https://doi.org/10.4271/2009-01-2645.
- “Fuels for Advanced Combustion Engines (FACE) Working Group Mission Statement”, www.crcao.com/news/index.html, November 16, 2005.
- Szybist, James P.McFarlane Joanna, and Bunting Bruce G., Comparison of Simulated and Experimental Combustion of Biodiesel Blends in a Single Cylinder Diesel HCCI Engine, SAE paper 2007-01-4010.
- Bunting, Bruce G.Eaton, Scott, Naik, Chitralkumar V. Puduppakkam Chen-Pang, Chou Karthik V., and Meeks Ellen, A Comparison of HCCI Ignition Characteristics of Gasoline Fuels Using a Single-Zone Kinetic Model with a Five Component Surrogate Fuel, SAE paper 2008-01-2399.
- Bunting, Bruce G.Eaton, Scott J.Storey John, Fairbridge Craig, Mitchell Ken, Crawford Robert W., Gallant Tom, Franz Jim, and Alnaijar Mikhail, The Chemistry, Properties, and HCCI Combustion Behavior of Refinery Streams Derived from Canadian Oil Sands Crude, SAE paper 2008-01-2406.
- Bunting Bruce G., Eaton Scott J., Crawford Robert W., Xu Yi, and Wolf Les R., Kumar Shankar, Stanton Don, and Fang Howard, Performance of Biodiesel Blends of Different FAME Distributions in HCCI Combustion, SAE paper 2009-01-1342.
- “ASTM Test Analyses of FACE Diesel Fuels - Final”, www.crcao.com/news/index.html, August 28, 2008.
- Bunting Bruce G., Crawford Robert W., Wolf Les R., and Xu Yi, The Relationships of Diesel Fuel Properties, Chemistry, and HCCI Engine Performance as Determined by Principal Components Analysis, SAE paper 2007-01-4059.