This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Knock Behavior of SI-Engines: Thermodynamic Analysis of Knock Onset Locations and Knock Intensities
Technical Paper
2006-01-0225
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A general definition and an index for the assessment of different engine knock behavior have been developed. The knock onset locations have been determined by piezoresistive pressure actuators and optical fiber probes in full load engine operation mode. The thermodynamic conditions at the knock onset locations have been quantified by CFD-calculations. Therefore the local fuel concentration, mixture temperature and residual gas concentration have been considered. These calculated thermodynamic conditions were further used to calculate the necessary volume of an exothermal center for the generation of the maximal measured pressure amplitudes.
Recommended Content
Authors
Citation
Rothe, M., Heidenreich, T., Spicher, U., and Schubert, A., "Knock Behavior of SI-Engines: Thermodynamic Analysis of Knock Onset Locations and Knock Intensities," SAE Technical Paper 2006-01-0225, 2006, https://doi.org/10.4271/2006-01-0225.Also In
References
- Zeldovic Y.B. Regime Classification of an Exothermic Reaction with Nonuniformal Initial Conditions Combustion and Flame 39 211 214 1980
- König G. Maly R.R. Bradly D. Lau A.K.C. Sheppard C.G.W. Role of Exothermic Centers on Knock Initiation and Knock Damage SAE Transaction Series, SAE Paper 902136 1990
- Kleinschmidt W. 2000
- Worret R. Bernhardt S. Schwarz F. Spicher U. Application of Different Cylinder Pressure Based Knock Detection Methods in Spark Ignition Engines SAE Technical Paper Series, 2002-01-1668
- Warnatz J. Maas U. Dibble R. Springer Verlag 2001
- Maas U. Warnatz J. Detailed Numerical Modeling of H 2 -O 2 Ignition by Hot Spots Progress in Astronautics and Aeronautics 131 1989
- Maas U. Warnatz J. Ignition Processes in Hydrogen-Oxygen Mixtures and the Influence of the Uniform Pressure Assumption Progress in Astronautics and Aeronautics 113 1988
- Goyal G. Warnatz J. Maas U. Numerical studies of hot spot ignition in H 2 -O 2 and CH 4 -air mixtures 23 rd Symposium on Combustion The Combustion Institute Pittsburgh PA 1767 1773 1990
- Lewis B. von Elbe G. Combustion, Flames and Explosions of Gases Academic Press Inc. Orlando 3rd 1987
- Kollmeier H. P. RWTH Aachen 1987
- Kaufmann M. Berckmüller M. Wetzel M. Hartmann M. Schenk M. Brehm N. Schwarz C. 53 2005
- Maiwald O. 3-8325-0933-X 2005
- Zierep J. G. Braun Verlag Karlsruhe 1976
- Weller H.G. Uslu S. Gosman A.D. Maly R.R. Herweg R. Heel B. Prediction of Combustion in Homogenous-Charge Spark Ignition Engines International Symposium COMODIA 1994
- Peters H. Worret R. Spicher U. Numerical Analyses of the Combustion Process in a Spark-Ignition Engine 5th International Symposium, COMMODIA 2001 Nagoya, Japan 2001