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Dynamic Mapping of Diesel Engine through System Identification

Författare:
Publiceringsår: 2012
Språk: Engelska
Sidor: 223-239
Publikation/Tidskrift/Serie: Identification for Automotive Systems (Lecture Notes in Control and Information Sciences )
Volym: 418
Dokumenttyp: Konferensbidrag
Förlag: Springer

Sammanfattning

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.

Disputation

Nyckelord

  • Technology and Engineering

Övrigt

Workshop on Identification for Automotive Systems
2010-07-15
Linz, Austria
Published
Yes
  • LCCC
  • ISSN: 0170-8643

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