Simulation of Urea-SCR Process Applied to Lean-burn SI Engines

2009-01-2776

11/02/2009

Event
SAE 2009 Powertrains Fuels and Lubricants Meeting
Authors Abstract
Content
Lean-burn combustion in SI engines can significantly reduce fuel consumption but NOx reduction becomes challenging because classic three-way catalyst (TWC) is no more efficient. Urea-SCR is then an interesting alternative solution because of its high NOx conversion efficiency without any additional fuel consumption.
The coupling between two SI lean-burn engines (stratified and homogeneous combustion) and a urea-SCR catalyst was simulated on the NEDC cycle. Simulation results showed that the SCR efficiency would comply with the limits required by future Euro 5/6 regulations. Associated urea solution consumptions were estimated thanks to a simplified model.
Finally, a comparison with a Diesel application was also made. It showed that the required amount of reducing agent remained significantly higher for SI lean-burn engines than for Diesel engine.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2776
Pages
13
Citation
Zinola, S., Raux, S., and Dabadie, J., "Simulation of Urea-SCR Process Applied to Lean-burn SI Engines," SAE Technical Paper 2009-01-2776, 2009, https://doi.org/10.4271/2009-01-2776.
Additional Details
Publisher
Published
Nov 2, 2009
Product Code
2009-01-2776
Content Type
Technical Paper
Language
English