Title
On-line fuel-efficiency optimization of Diesel engines using constrained multivariable extremum-seeking
Author
van der Weijst, R.
van Keulen, T.
Willems, F.P.T.
Publication year
2018
Abstract
Advanced control concepts are required to maximize the fuel-efficiency of Diesel engines and to comply with emission legislation. The aim of this paper is to develop a controller that fully utilizes the fuel-path and air-path hardware, and is adaptive for real-world disturbances. The control design comprises a feedback control system, which uses air-path actuators and fuel injection settings to robustly track engineout NOx emission and engine power demands, as well as two parameters that are known to influence the NOx emission versus fuel consumption trade-off; combustion phasing and pumping losses. Furthermore, an on-line implementable convex cost criterion is proposed that evaluates the injector opening time to obtain a cost output which is equivalent to fuel efficiency. A multivariable constrained extremum-seeking method is applied to minimize the cost output, as a function of combustion phasing and pumping losses, subject to constraints on the tracking performance of the low-level control system. The control design is implemented on a Euro-VI Diesel engine equipped with exhaust gas recirculation and a variable geometry turbine, as well as in-cylinder pressure sensors. The experiments demonstrate the effectiveness of the applied extremum-seeking approach in finding the (constrained) optimum, for a constant engine speed and torque. © 2018 European Control Association (EUCA).
Subject
Adaptive control systems
Combustion
Constrained optimization
Control theory
Economic and social effects
Efficiency
Engine cylinders
Exhaust gas recirculation
Feedback control
Fuels
Leveling (machinery)
Nitrogen oxides
Product design
Advanced control
Combustion phasing
Emission legislation
Extremum seeking
In-cylinder pressures
Low level control system
Tracking performance
Variable geometry turbines
Diesel engines
To reference this document use:
http://resolver.tudelft.nl/uuid:ba416c8a-ab46-4de0-8711-81c72c4250e8
TNO identifier
861666
Publisher
Institute of Electrical and Electronics Engineers Inc.
ISBN
9783952426982
Source
2018 European Control Conference, ECC 2018, 16th European Control Conference, ECC 2018, 12 June 2018 through 15 June 2018, 213-218
Article number
8550156
Bibliographical note
Sponsor: European Control Association (EUCA)
Document type
conference paper