A control oriented multivariable identification procedure for turbocharged diesel engines
by Chris Criens; Thijs Van Keulen; Frank Willems; Maarten Steinbuch
International Journal of Powertrains (IJPT), Vol. 5, No. 2, 2016

Abstract: In this paper, multisine frequency response function identification is used for non-parametric modelling of the air path of a turbocharged diesel engine around a fixed operating point. The variable geometry turbine (VGT) and exhaust gas recirculation (EGR) valve are used as inputs. The nitrogen oxide emissions, air-fuel equivalence ratio, and pressure difference between the intake and exhaust manifold are the considered outputs. A time-efficient and accurate identification procedure for this input-output system is devised, analysed, and executed experimentally for a range of operating points. The analysis quantifies the individual effects of noise and nonlinearities and shows that the identified linear models capture the actual local behaviour with over 97.2% accuracy.

Online publication date: Fri, 13-May-2016

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