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

Robert van der Weijst; Thijs van Keulen; Frank Willems

doi:10.1016/j.conengprac.2019.03.008

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

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

Control Systems Technology

Research output: Contribution to journal › Article › Academic › peer-review

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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 language	English
Pages (from-to)	133-144
Number of pages	12
Journal	Control Engineering Practice
Volume	87
DOIs	https://doi.org/10.1016/j.conengprac.2019.03.008
Publication status	Published - 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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10.1016/j.conengprac.2019.03.008

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title = "Constrained multivariable extremum-seeking for online fuel-efficiency optimization of Diesel engines",

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.",

keywords = "Constraint handling, Diesel engine control, Extremum-seeking, Fuel-efficiency optimization, Multivariable control, Real-time optimization, Real-world driving emissions",

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