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Hybrid 2-Zone Diesel Combustion Model for NO Formation

Journal Article
ISSN: 1946-3936, e-ISSN: 1946-3944
Published September 13, 2009 by Consiglio Nazionale delle Ricerche in Italy
Hybrid 2-Zone Diesel Combustion Model for NO Formation
Citation: Oppenauer, K. and Re, L., "Hybrid 2-Zone Diesel Combustion Model for NO Formation," SAE Int. J. Engines 2(2):584-596, 2010,
Language: English


This paper presents a methodology which is able to calculate emissions over crank angle (CA) using the measured cylinder pressure. The models are based on a 2-zone Diesel combustion process calculation combined with data based methods to fulfill the objective of a wide operating range, for a later possible use in transients — differently from the standard methods, which usually work accurate only in a small range. The resulting hybrid or grey box oriented model structure offers many advantages when purely physical modeling is too complicated and the combination with data based methods allow to obtain better results. The workflow of CA based emission models on the basis of a 2-zone calculation is presented. The focus of this paper is to explain the development process of a nitric oxide (NO) formation model, which is accurate over a wide operating range. For future similar data based particulate matter (PM) models the shown workflow could be used too.