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Mean Value Models for Exhaust System Temperatures
Linköpings universitet, Institutionen för systemteknik, Fordonssystem. Linköpings universitet, Tekniska fakulteten.
2003 (engelsk)Inngår i: SAE technical paper series, ISSN 0148-7191, Vol. 111, nr 3Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Exhaust temperatures are important for turbine and catalyst performance. A set of exhaust temperature models suitable for turbo matching as well as design and analysis of engine control systems are developed and investigated. The models are lumped parameter heat transfer models, that fall within the category of mean value engine models. The model is developed for describing exit temperatures from the exhaust manifold and temperature drops in pipe sections in the exhaust system. The components used to model the exhaust temperature are: engine out temperature, temperature drop in a straight pipe, and a set of heat transfer modes. The model is validated using data from three different engines. It is shown that, for a spark ignited engine operating at MBT and stoichiometric conditions, it is sufficient to model the engine out temperature as a linear function of mass flow. Recommendations for tuning the model are also given. A thorough survey of exhaust heat transfer literature is also made together with a comparative summary of the different heat transfer modes that are present in the exhaust.

sted, utgiver, år, opplag, sider
2003. Vol. 111, nr 3
Emneord [en]
Engine Modelling
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-137255DOI: 10.4271/2002-01-0374Scopus ID: 2-s2.0-33645325872OAI: oai:DiVA.org:liu-137255DiVA: diva2:1094334
Tilgjengelig fra: 2017-05-09 Laget: 2017-05-09 Sist oppdatert: 2017-05-18bibliografisk kontrollert

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