This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
IMEP-Estimation and In-Cylinder Pressure Reconstruction for Multicylinder SI-Engine by Combined Processing of Engine Speed and One Cylinder Pressure
Technical Paper
2005-01-0053
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In order to optimize the performance and emission of engines, advanced control and diagnostic systems require detailed feedback information about the combustion process. In this context, cost-effective solutions are of interest.
The contribution describes a method for reconstructing cylinder-individual features of each combustion cycle by processing the instantaneous fluctuations of the engine speed and the in-cylinder pressure of one cylinder. Model-based torque estimation, analyzing both of the signals simultaneously, provides an accurate estimation of the mean indicated pressure. Using this method, a new algorithm for advanced misfire detection is presented. Furthermore, a new pressure model with a feasible number of parameters is proposed. It is combined with the torque estimation in order to reconstruct the unknown pressure traces of the cylinders not equipped with sensors. Measurement data obtained from a vehicle with a four cylinder SI-engine is used to demonstrate the performance of the methods over the whole range of engine speed and load.
Recommended Content
Authors
Citation
Hamedović, H., Raichle, F., Breuninger, J., Fischer, W. et al., "IMEP-Estimation and In-Cylinder Pressure Reconstruction for Multicylinder SI-Engine by Combined Processing of Engine Speed and One Cylinder Pressure," SAE Technical Paper 2005-01-0053, 2005, https://doi.org/10.4271/2005-01-0053.Also In
References
- Heywood J.B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Hohenberg G. “Advanced approaches for heat transfer calculations,” SAE Technical Paper 790825 1979
- Guezennec Y.G. Gyan P. “A novel approach to real-time estimation of the individual cylinder combustion pressure for S.I. engine control,” SAE Technical Paper 1999-01-0209 1999
- Citron S.J. O'Higgins J.E. Chen L.Y. “Cylinder by cylinder engine pressure and pressure torque waveform determination utilizing speed fluctuations,” SAE Technical Paper 890486 1989
- Fehrenbach H. “Berechnung des Brennraumdruckverlaufes aus der Kurbelwellen-Winkelgeschwindigkeit von Verbrennungsmotoren,” Fortschritt-Berichte VDI 6 255 1991
- Klenk M. Moser W. Mueller W. Wimmer W. “Misfire detection by evaluating crankshaft speed - A means to comply with OBDII,” SAE Technical Paper 93099 1993
- Larsson S. Schagerberg S. “SI-engine cylinder pressure estimation using torque sensors,” SAE Technical Paper 2004-01-1369 2004
- Wagner M. Böhme J.F. Förster J. “In-cylinder pressure estimation from structure-borne sound,” SAE Technical Paper 2000-01-0930 2000
- Villarino R. Böhme J.F. “Fast in-cylinder pressure reconstruction from structure-borne sound using the EM-algorithm,” Proc. ICASSP'03 6 597 600 2003
- Villarino R. Böhme J.F. “Misfire detection in automotive engines using structure-borne sound,” SAE Technical Paper 2004-01-0520 2004
- Savitzky A. Golay M.J.E. “Smoothing and differentiation of data by simplified least squares procedures,” Analytical Chemistry 36 1627 1639 1964