IMEP-Estimation and In-Cylinder Pressure Reconstruction for Multicylinder SI-Engine by Combined Processing of Engine Speed and One Cylinder Pressure 2005-01-0053
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.
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. Download Citation
Haris Hamedović, Franz Raichle, Jörg Breuninger, Wolfgang Fischer, Werner Dieterle, Martin Klenk, Johann F. Böhme
Robert Bosch GmbH, Ruhr-Universität Bochum
SAE 2005 World Congress & Exhibition
Electronic Engine Controls 2005-SP-1975, SAE 2005 Transactions Journal of Engines-V114-3