A Semi-Physical NOx Model for Diesel Engine Control IFP Energies Nouvelles

Format:

Conference/Event

Author/Creator:

Quérel, Quérel, author.

Contributor:

Grondin, Olivier

Letellier, Christophe

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

In this paper, a new physics-based model for the prediction of NOx emissions produced by diesel engines is presented. The aim of this work is to provide a reference model for the validation of control strategies and NOx estimators. The model describes the NOx production in the burned gas zone where the burned gas temperature sub-model is adapted to be generic and tunable. The model consists of three main sub-models for the estimation of the burned gas temperature, the concentration of the species in the burned gases and the NOx formation, respectively. A new model for estimating the burned gas temperature, known to have a strong impact on thermal NOx formation rate, is proposed. The model depends on the intake burned gas ratio and the combustion phasing computed from the cylinder pressure. This model has a limited number of calibration parameters identified so that NOx model output matches with experimental data measured in a four-cylinder, four-stroke, direct-injection diesel engine. The proposed model is compared with a standard physical zero-dimensional thermodynamic approach. The new burned gas temperature sub-model enables to highly improve NOx estimation accuracy both in steady-state and transient operations, compared to purely physical models

Notes:

Vendor supplied data

Publisher Number:

2013-01-0356

Access Restriction:

Restricted for use by site license