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An HCCI Engine Fuelled with Iso-octane and Ethanol
Technical Paper
2006-01-3246
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper investigates Homogeneous Charge Compression Ignition (HCCI) combustion on an engine that is fuelled with ethanol, iso-octane, and ethanol/iso-octane. The engine is a four-stroke three cylinder indirect injection type diesel engine converted to a single cylinder HCCI operation. In order to clarify the effects of fuel chemistry on HCCI combustion, the trials were done at a constant engine speed, a fixed initial charge temperature and engine coolant temperature. The HCCI engine was fuelled with a lean mixture of air and fuel (ethanol, iso-octane or mixture of ethanol/iso-octane).
The engine performance parameters studied here include indicated mean effective pressure (IMEP) and thermal efficiency. Heat-release rate (HRR) analysis was done to determine the effect of fuels on combustion on-set. The experimental results demonstrate that the addition of iso-octane to ethanol retards the on-set of combustion and subsequently leads to a reduction of the IMEP and thermal efficiency. For a particular fuel, the on-set of combustion depends closely on the intake charge temperature (as reported by several other researchers) and any increase in the initial charge temperature leads to advances in the on-set of combustion. Furthermore, the experimental results demonstrate that operating the engine on a lean charge reduces engine-out NOx emissions significantly.
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Gnanam, G., Sobiesiak, A., Reader, G., and Zhang, C., "An HCCI Engine Fuelled with Iso-octane and Ethanol," SAE Technical Paper 2006-01-3246, 2006, https://doi.org/10.4271/2006-01-3246.Also In
References
- Tabaczynski, R. “Future Powertrain Technologies” ASME ICE Meeting Austin, Texas, USA 2000
- Oakley, A. et al. “Dilution Effects on the Controlled Auto-Ignition (CAI) Combustion of Hydrocarbon and Alcohol Fuels”, “Homogenous Charge Compression Ignition (HCCI) Engines; Key Research and Development Issues ” SAE PT-94
- Guerrieri, D. et al. “Investigation into the Vehicle Exhaust Emissions of High Percentage Ethanol Blends” SAE paper 950777 1995
- Zhao, F. et al. “Homogenous Charge Compression Ignition (HCCI) Engines; Key Research and Development Issues ” SAE PT-94
- Furutani, M. et al. “An investigation into the effect of fuel composition on HCCI combustion characteristics” Proceedings of Comodia '98 173 177 1998
- Christensen, M. et al. “Demonstrating the Multi Fuel Capacity of a Homogeneous Charge Compression Ignition Engine with Variable Compression Ratio” SAE paper 1999-01-3679 1999
- Cairns, A. Baxill, H. “The Effects of Combined Internal and External EGR on Gasoline Controlled Auto-Ignition” SAE paper 2005-01-0133
- Zhang, Y. et al. “The Combustion and Emission Characteristics of Ethanol on a Port Fuel Injection HCCI Engine” SAE paper 2006-01-0631
- Mack, J.H. et al. “Investigation of HCCI combustion of diethyl ether and ethanol mixtures using carbon 14 tracing and numerical simulations” Proceedings of the Combustion Institute 30 2 2693 2700 2005
- Lü, X. et al. “Experimental study on the auto-ignition and combustion characteristics in the HCCI combustion operation with ethanol/n-heptane blend fuels by port injection” Fuel, In Press, Uncorrected Proof 8 June 2006
- Zoldak, P. “Design of a Research Engine for HCCI Combustion” University of Windsor 2005
- Tanaka, S. et al. “Two-stage ignition in HCCI combustion and HCCI control by fuel and additives” Combustion and Flame 132 219 239 2003
- Marriott, C. D Reitz, R.D. “Experimental Investigation of Direct Injection Gasoline for Premixed Compression Ignited Combustion Phasing Control” SAE paper 2002-01-0418
- Martinez-Frias, J. et al. “HCCI Engine Control by Thermal Management” SAE paper 2000-01-2869
- Ayoma, T. et al. “An Experimental Study on Premixed-Charge Compression Ignition Gasoline Engine” SAE paper 960081
- Pucher, G. et al. “Alternative Combustion Systems for Piston Engines Involving Homogeneous Charge Compression Ignition Concepts - A Review of Studies Using Methanol, Gasoline and Diesel Fuel” SAE paper 962063
- Christensen, M. Johansson, B. “Supercharged Homogeneous Charge Compression Ignition” SAE paper 980787
- Xie, H. et al. “Comparison of HCCI Combustion Respectively Fueled with Gasoline, Ethanol and Methanol through Trapped Residual Gas Strategy” SAE paper 2006-01-0635
- Christensen, M Johansson, B. “Homogeneous Charge Compression Ignition with Water Injection” SAE paper 1999-01-0182
- Van Blarigan., P. et al. “Homogeneous Charge Compression Ignition with a Free Piston: A New Approach to Ideal Otto Cycle Performance” SAE paper 982484