Zero-dimensional modeling of NOx formation with least squares interpolation

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Physical models of NOx formation are becoming more and more interesting in the area of combustion feedback control. The fact that cylinder pressure sensors are made available on the market enables fast and accurate calculations of heat release, which is an essential part of every physical NOx formation model. This article describes such a zero-dimensional model for a diesel engine using crank angle-resolved cylinder pressure to determine heat release. The model also incorporates the thermal effect of exhaust gas recirculation that is proven to have a major effect on NOx formation rates. The reaction mechanisms used to describe NOx formation rates are given by the well-known Zeldovich mechanism. The model output results given in this article show an average deviation of about 12.0% from acquired measured NOx data. The least squares interpolation approach indicates a negligible difference from the original model with an average deviation of 1.2% in 25 measurement points.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Annan maskinteknik

Nyckelord

Originalspråkengelska
Sidor (från-till)944-953
TidskriftInternational Journal of Engine Research
Volym15
Utgåva nummer8
StatusPublished - 2014
PublikationskategoriForskning
Peer review utfördJa

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Per Tunestål, Ola Stenlåås & Carlos Jorques Moreno

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Projekt: ForskningSamarbete med industri

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