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A Predictive Real Time NOx Model for Conventional and Partially Premixed Diesel Combustion
Lunds Tekniska Högskola, Värme- och kraftteknik.
2006 (English)In: SAE, Session: Diesel Engine Modeling, 2006Conference paper (Refereed)
Abstract [en]

A previously presented robust and fast diagnostic NOx model was modified into a predictive model. This was done by using simple yet physically-based models for fuel injection, ignition delay, premixed heat release rate and diffusion combustion heat release rate. The model can be used both for traditional high temperature combustion and for high-EGR low temperature combustion. It was possible to maintain a high accuracy and calculation speed of the NOx model itself. The root mean square of the relative model error is 16 % and the calculation speed is around one second on a PC. Combustion characteristics such as ignition delay, CA50 and the general shape of the heat release rate are well predicted by the combustion model. The model is aimed at real time NOx calculation and optimization in a vehicle on the road.

Place, publisher, year, edition, pages
, SAE Technical Papers, 2006-01-3329
Keyword [en]
Calculation speed, Combustion characteristics, Combustion model, Diesel combustion, Diffusion combustion, Heat Release Rate (HRR), High-temperature combustion, Ignition delays, Low temperature combustion, Model errors, Physically based models, Predictive models, Premixed, Real time, Root Mean Square
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-177565DOI: 10.4271/2006-01-3329ScopusID: 2-s2.0-84877226287OAI: diva2:873260
Powertrain & Fluid Systems Conference and Exhibition, Toronto, ON, CANADA, 16 October 2006 through 19 October 2006

QC 20151124

Available from: 2015-11-23 Created: 2015-11-23 Last updated: 2015-11-24Bibliographically approved

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Hultqvist, Anders
Mechanical Engineering

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ReferencesLink to record
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