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Estimation of Cylinder-Wise Combustion Features from Engine Speed and Cylinder Pressure
- Christoph Kallenberger - Robert Bosch GmbH ,
- Haris Hamedović - Robert Bosch GmbH ,
- Franz Raichle - Robert Bosch GmbH ,
- Jörg Breuninger - Robert Bosch GmbH ,
- Wolfgang Fischer - Robert Bosch GmbH ,
- Klaus Benninger - Robert Bosch GmbH ,
- Albert Nistor - Chalmers University of Technology ,
- Abdelhak M. Zoubir - Technische Universität Darmstadt
ISSN: 1946-3936, e-ISSN: 1946-3944
Published April 14, 2008 by SAE International in United States
Citation: Kallenberger, C., Hamedović, H., Raichle, F., Breuninger, J. et al., "Estimation of Cylinder-Wise Combustion Features from Engine Speed and Cylinder Pressure," SAE Int. J. Engines 1(1):198-207, 2009, https://doi.org/10.4271/2008-01-0290.
Advanced engine control and diagnosis strategies for internal combustion engines need accurate feedback information from the combustion engine. The feedback information can be utilized to control combustion features which allow the improvement of engine's efficiency through real-time control and diagnosis of the combustion process.
This article describes a new method for combustion phase and IMEP estimation using one in-cylinder pressure and engine speed. In order to take torsional deflections of the crankshaft into account a gray-box model of the crankshaft is identified by subspace identification. The modeling accuracy is compared to a stiff physical crankshaft model. For combustion feature estimation, the identified MISO (multiple input single output) system is inverted. Experiments for a four-cylinder spark-ignition engine show the superior performance of the new method for combustion feature estimation compared to a stiff model approach.