Browse Publications Technical Papers 2006-01-3551
2006-10-31

Simulated Performance of a Diesel Aftertreatment System for U.S. 2010 Application 2006-01-3551

An aftertreatment system for medium and heavy-duty diesel engines has been modeled for U.S. 2010 application. The aftertreatment system is comprised of a lean NOx trap (LNT) and an ammonia selective catalytic reduction (SCR) catalyst in series. Descriptions of the fully transient, one-dimensional LNT and SCR models are presented. The models simulate flow, heat transfer, and chemical reactions in the LNT and SCR catalysts. The models can be used to predict catalyst performance over a range of operating conditions and driving cycles.
Simulated results of NOx conversion efficiency, species concentrations, and gas temperature were compared to experimental data for a 13-mode test. The model results showed the LNT-SCR model predicts system performance with reasonable accuracy in comparison to experimental data. Therefore, two model applications were investigated. First, LNT and SCR volumes were varied to examine the effect on NOx conversion efficiency and NH3 production. Second, a long pipe was modeled between the LNT and SCR catalysts to examine the effect of the pipe on the thermal response of the system and SCR NOx conversion efficiency. The design implications of both studies are discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Advanced NOx Aftertreatment System And Controls For On-Highway Heavy Duty Diesel Engines

2006-01-3552

View Details

TECHNICAL PAPER

Investigation of Urea Deposits in Urea SCR Systems for Medium and Heavy Duty Trucks

2010-01-1941

View Details

JOURNAL ARTICLE

Reduction of Heavy-Duty Diesel Exhaust Particle Number and Mass at Low Exhaust Temperature Driving by the DOC and the SCR

2012-01-1664

View Details

X