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Engine Emission Modeling Using a Mixed Physics and Regression Approach
Journal article

Engine Emission Modeling Using a Mixed Physics and Regression Approach

  • Benz, Michael Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
  • Onder, Christopher H. Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
  • Guzzella, Lino Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
  • 2010-1-19
Published in:
  • Journal of Engineering for Gas Turbines and Power. - ASME International. - 2010, vol. 132, no. 4
Fuel Technology
Mechanical Engineering
Energy Engineering and Power Technology
Nuclear Energy and Engineering
Aerospace Engineering
English This paper presents a novel control-oriented model of the raw emissions of diesel engines. An extended quasistationary approach is developed where some engine process variables, such as combustion or cylinder charge characteristics, are used as inputs. These inputs are chosen by a selection algorithm that is based on genetic-programming techniques. Based on the selected inputs, a hybrid symbolic regression algorithm generates the adequate nonlinear structure of the emission model. With this approach, the model identification efforts can be reduced significantly. Although this symbolic regression model requires fewer than eight parameters to be identified, it provides results comparable to those obtained with artificial neural networks. The symbolic regression model is capable of predicting the behavior of the engine in operating points not used for the model parametrization, and it can be adapted easily to other engine classes. Results from experiments under steady-state and transient operating conditions are used to show the accuracy of the presented model. Possible applications of this model are the optimization of the engine system operation strategy and the derivation of virtual sensor designs.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/140213
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