Dynamic Mapping of Diesel Engine through System Identification

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

From a control design point of view, modern diesel engines are dynamic, nonlinear, MIMO systems. This paper presents a method to find low-complexity black-box dynamic models suitable for model predictive control (MPC) of NOx and soot emissions based on on-line emissions measurements. A four-input-five-output representation of the engine is considered, with fuel injection timing, fuel injection duration, exhaust gas recirculation (EGR) and variable geometry turbo (VGT) valve positions as inputs, and indicated mean effective pressure, combustion phasing, peak pressure derivative, NOx emissions, and soot emissions as outputs. Experimental data were collected on a six-cylinder heavy-duty engine at 30 operating points. The identification procedure starts by identifying local linear models at each operating point. To reduce the number of dynamic models necessary to describe the engine dynamics, Wiener
models are introduced and a clustering algorithm is proposed. A resulting set of two to five dynamic models is shown to be able to predict all outputs at all operating points with good accuracy.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Mechanical Engineering
  • Control Engineering

Keywords

  • Diesel engines, System identification, Wiener models
Original languageEnglish
Title of host publicationProceedings of the 2010 American Control Conference
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Pages3015-3020
ISBN (Electronic)978-1-4244-7427-1
ISBN (Print)978-1-4244-7426-4
Publication statusPublished - 2010
Publication categoryResearch
Peer-reviewedYes
EventAmerican Control Conference, 2010 - Baltimore, MD, Baltimore, MD, United States
Duration: 2010 Jun 302010 Jul 2

Publication series

NameAmerican Control Conference. Proceedings
ISSN (Print)0743-1619
ISSN (Electronic)2378-5861

Conference

ConferenceAmerican Control Conference, 2010
CountryUnited States
CityBaltimore, MD
Period2010/06/302010/07/02

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