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The Development of Real-time NOx Estimation Model and its Application Seoul National Univ
- Format:
- Conference/Event
- Author/Creator:
- Lee, Lee, author.
- 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:
- To meet the stringent emission regulations on diesel engines,engine-out emissions have been lowered by adapting new combustionconcepts such as low-temperature combustion and after-treatmentsystems have also been used to reduce tailpipe emissions. Tooptimize the control of both in-cylinder combustion and theefficiency of an after treatment system to reduce NOx, the amountof real-time NOx emissions should be determined.Therefore, in previous studies, the authors developed areal-time NO estimation model based on the in-cylinder pressure andthe data available from the ECU during engine operation. The modelwas evaluated by comparing its results with a CFD model, whichagreed well. Then, the model was implemented on an embedded systemwhich allows real-time applications, and was verified on a2.2-liter diesel engine. The model showed good agreement with theexperimental results at various steady-state conditions and simpletransient conditions.In this paper, to verify the performance and to investigate thecharacteristics of the real-time estimation of the model, theengine-out NO emissions measured by a fast NOx analyzer and theestimated NO emissions were compared during ECE-15 and EUDC cycles.Furthermore, to extend the NO model to a complete NOx predictionmodel, an empirical NO₂ prediction model is proposed based on theexperiments under steady-state conditions. The in-house EGRprediction model was also applied in the NOx prediction model foraccurate cycle-by-cycle prediction and used as an input duringtransient engine operations
- Notes:
- Vendor supplied data
- Publisher Number:
- 2013-01-0243
- Access Restriction:
- Restricted for use by site license
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