Estimation of the Engine-Out NO2/NOx Ratio in a EURO VI Diesel Engine Politecnico di Torino

Format:

Conference/Event

Author/Creator:

Finesso, Finesso, author.

Contributor:

Misul, Daniela

Spessa, Ezio

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:

The present work has the aim of developing a semi-empiricalcorrelation to estimate the NO₂/NOx ratio as a functionof significant engine operating variables in a modern EURO VIdiesel engine.The experimental data used in the present study were acquired atthe dynamic test bench of ICEAL-PT (Internal Combustion EngineAdvanced Laboratory at the Politecnico di Torino), in the frame ofa research activity on the optimization of a General Motors Euro VIprototype 1.6-liter diesel engine equipped with a single-stagevariable geometry turbine and a solenoid Common Rail system. Theexperimental tests were conducted over the whole engine map.A preliminary analysis was carried out to evaluate theuncertainty of the experimental acquired data and theNO₂/NOx ratio. The main engine variables which wereexpected to be related to the NO₂ formation were then identified,and a second-order polynomial model was introduced to model theNO₂/NOx ratio as a function of the abovementionedrelated engine variables. All the input variable combinations wereconsidered in the investigation, in order to identify the mostimportant for the evaluation of the NO₂/NOx ratio.Finally, a simplified exponential correlation was established toestimate the NO₂/NOx ratio, that could be used inseveral applications, including feed-forward model-based combustioncontrol. The model was tested and validated on a NEDC cycle (NewEuropean Driving Cycle)

Notes:

Vendor supplied data

Publisher Number:

2013-01-0317

Access Restriction:

Restricted for use by site license