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HCCI Operating Range in a Turbo-charged Multi Cylinder Engine with VVT and Spray-Guided DI
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 20, 2009 by SAE International in United States
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Homogenous charge compression ignition (HCCI) has been identified as a promising way to increase the efficiency of the spark-ignited engine, while maintaining low emissions. The challenge with HCCI combustion is excessive pressure rise rate, quantified here with Ringing Intensity. Turbocharging enables increased dilution of the charge and thus a reduction of the Ringing Intensity. The engine used is an SI four cylinder base with 2.2L displacement and is equipped with a turbocharger. Combustion phasing control is achieved with individual intake/ exhaust cam phasing. Fuel injection with spray guided design is used. Cycle resolved combustion state is monitored and used for controlling the engine either in closed or open loop where balancing of cylinder to cylinder variations has to be done to run the engine at high HCCI load. When load is increased the NOx levels rise, the engine is then run in stoichiometric HCCI mode to be able to use a simple three-way catalyst. The fuel used is 95 RON pump gasoline and injection strategies are evaluated in order to maintain low soot levels and high efficiency. Limitations and benefits on operating range are examined between 1000 and 3000 rpm. This paper investigates how to extend the HCCI range and how to reduce the high pressure rise rate with: increased boost from turbocharging, external EGR and different injection strategies. A higher boost pressure was found to extend the load range. It is shown that the limitation from high RI, NOx or soot is not the same in all engine speed and load points. By turbocharging the engine in HCCI mode there is greater flexibility to increase the range of practical operating points.
CitationJohansson, T., Johansson, B., Tunestål, P., and Aulin, H., "HCCI Operating Range in a Turbo-charged Multi Cylinder Engine with VVT and Spray-Guided DI," SAE Technical Paper 2009-01-0494, 2009, https://doi.org/10.4271/2009-01-0494.
Homogeneous Charge Compression Ignition Engines, 2009
Number: SP-2242; Published: 2009-04-20
Number: SP-2242; Published: 2009-04-20
- Christensen, M. Johansson, B. Amnéus, P. Mauss, F. “Supercharged homogeneous charge compression ignition,” SAE Paper 980787
- Christensen, M. Johansson, B. “Supercharged homogeneous charge compression ignition (hcci) with exhaust gas recirculation and pilot fuel,” SAE Paper 2000-01-1835
- Hyvönen, J. Haraldsson, G. Johansson, B. “Supercharging HCCI to extend the operating range in a multi-cylinder VCR-HCCI engine,” SAE Paper 2003-01-3214
- Olsson, J-O. Tunestål, P. Johansson, B. “Boosting for high load HCCI,” SAE Paper 2004-01-0940
- Heywood, J. B. “Internal Combustion Engine Fundamentals,” McGraw-Hill New York 1988
- Andreae, M.M Cheng, W.K. Kenney, T. Yang, J. “On HCCI Engine Knock,” SAE Paper 2007-01-1858
- Eng, J.A. “Characterization of pressure waves in HCCI combustion,” SAE Paper 2002-01-2859
- Koopmans, L. Ogink, R. Denbratt, I. “Direct gasoline injection in the negative valve overlap of a homogeneous charge compression ignition engine,” SAE Paper 2003-01-1854
- Yang, J. Kenney, T. “Some concepts of DISI engine for high fuel efficiency and low emissions,” SAE Paper 2002-01-2747
- www.DieselNet.com Smoke Opacity
- Schindler, W. Nöst, M. Thaller, W. Luxbacher, T. “Stationäre und transiente messtechnische Erfassung niedriger Rauchwerte,” MTZ 2001 / 10
- Sjöberg, M. Dec, J.E. Hwang, W. “Thermodynamic and Chemical Effects of EGR and Its Constituents on HCCI Autoignition,” SAE Paper 2007-01-0207
- Yamaoka, S. Kakuya, H. Nagakawa, S. Okada, T. Shimada, A. Kihara, Y. “HCCI Operation Control in a Multi-Cylinder Gasoline Engine,” SAE Paper 2005-01-0120
- Persson, H. Pfeiffer, R. Hultqvist, A. Johansson, B. Strm, H. “Cylinder-to-Cylinder and Cycle-to-Cycle Variations at HCCI Operation With Trapped Residuals,” SAE Paper 2005-01-0130