A transient, one-dimensional lean NOx trap (LNT) model is described and implemented for vehicle systems simulations. The model accounts for conservation of chemical species and thermal energy, and includes the effects of O₂ storage and NOx storage (in the form of nitrites and nitrates). Nitrites and nitrates are formed by diffusion of NO and NO₂, respectively, into sorbent particles, and reaction rates are controlled by chemical kinetics and solid-phase diffusion. The model also accounts for thermal aging and sulfation by means of empirical correlations, which have been derived from laboratory experiments. Example simulation results using the Powertrain Systems Analysis Toolkit (PSAT) are presented.
Lean NOx Trap Modeling for Vehicle Systems Simulations
Sae Int. J. Fuels Lubr
Sae International Journal of Fuels and Lubricants
SAE 2010 World Congress & Exhibition ; 2010
Sae International Journal of Fuels and Lubricants ; 3 , 1 ; 468-485
12.04.2010
18 pages
Aufsatz (Konferenz)
Englisch
Lean NOx trap modeling for vehicle systems simulations
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