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Comparison of HCCI Operating Ranges for Combinations of Intake Temperature, Engine Speed and Fuel Composition
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 03, 2002 by SAE International in United States
Annotation ability available
Event: Future Car Congress
A series of engine experiments have been performed to explore the impact intake temperature, engine speed and fuel composition on the HCCI operating range of a CFR engine. The experimental matrix covers a range of engine speeds 600 - 2000 RPM), intake temperatures (300 K - 400 K), and four different fuels. Three of the fuels had different chemical composition but had equivalent research octane numbers of 91.8. The fourth fuel, a blend of primary reference fuels had a research octane number of 70.
The acceptable HCCI operating range of the engine was defined through two criteria; the rate of pressure rise needed to be less than 10 MPa per crank angle and the covariance of the indicated mean effective pressure needed to be less than 10 percent. Using these limits the HCCI operating range for the engine was evaluated for the experimental matrix. Data for emissions, and fuel consumption as well as in-cylinder pressure were recorded.
The HCCI operating range was broader for the lower octane fuel. Finally it is observed that the chemical composition of the fuel is important. With all other input parameters being equivalent, the three fuels with the same research octane number all exhibit different HCCI operating regimes.
- Tanet Aroonsrisopon - Engine Research Center, University of Wisconsin - Madison
- David E. Foster - Engine Research Center, University of Wisconsin - Madison
- Takeshi Morikawa - Yamaha Motor Company, Ltd. - currently in residence at the Engine Research Center, University of Wisconsin - Madison
- Minoru Iida - Yamaha Motor Company, Ltd.
CitationAroonsrisopon, T., Foster, D., Morikawa, T., and Iida, M., "Comparison of HCCI Operating Ranges for Combinations of Intake Temperature, Engine Speed and Fuel Composition," SAE Technical Paper 2002-01-1924, 2002, https://doi.org/10.4271/2002-01-1924.
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