Abstract Today restrictions on pollutant emissions are forcing more and more the use of catalystbased after-treatment systems both in SI and in Diesel engines. The application of monolith cores with a honeycomb structure is an established practice: however, to overcome drawbacks such as poor flow homogenization, the use of ceramic foams has been recently investigated [1,2,3] as an alternative showing better conversion efficiencies (even if with higher pressure losses). The scope of this paper is to analyse the effects of foam substrates on engine performance. For this purpose a 0D “crank-angle” real-time mathematical model developed by the Authors [4,5] has been enhanced improving the heat exchange model of the exhaust manifold to take account of thermal transients and adding an original 0D model of the catalytic converter to describe mass flows and thermal processes. The model has been used to simulate a 1.6l turbocharged Diesel engine during a driving cycle (EUDC). Effects of honeycomb and foam substrates on fuel consumption and on variations of catalyst temperatures and pressures are compared in the paper.
Real-time simulation of the effects of catalyst on automotive engines performance
2016-01-01
17 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Real-time simulation of the effects of catalyst on automotive engines performance
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