Constrained multivariable extremum-seeking for online fuel-efficiency optimization of Diesel engines

Robert van der Weijst (Corresponding author), Thijs van Keulen, Frank Willems

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Abstract

This work presents a new method for online fuel-efficiency optimization of Diesel engines, using constrained extremum-seeking. A two-input optimization problem, which is suitable for extremum-seeking, is integrated into a tracking control system. As a result, both air-path and fuel-path actuators are used for tracking and extremum-seeking. A key element of the proposed method is a cost function based on real-time BSFC estimation. Moreover, an existing constrained extremum-seeking method is extended to multiple output constraints. Experiments on a Euro-VI heavy-duty Diesel engine demonstrate the constraint handling, robustness with respect to real-world disturbances, and the fuel saving potential of the control design.

Original languageEnglish
Pages (from-to)133-144
Number of pages12
JournalControl Engineering Practice
Volume87
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • Constraint handling
  • Diesel engine control
  • Extremum-seeking
  • Fuel-efficiency optimization
  • Multivariable control
  • Real-time optimization
  • Real-world driving emissions

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