Three Way Catalyst Modeling with Ammonia and Nitrous Oxide Kinetics for a Lean Burn Spark Ignition Direct Injection (SIDI) Gasoline Engine University of Wisconsin-Madison

Format:

Conference/Event

Author/Creator:

Gong, Gong, author.

Contributor:

Rutland, Christopher

Conference Name:

SAE 2013 World Congress & Exhibition (2013-04-16 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2013

Summary:

A Three-Way Catalyst (TWC) model with global TWC kinetics forlean burn DISI engines were developed and validated. The modelincorporates kinetics of hydrocarbons and carbon monoxideoxidations, NOx reduction, water-gas and steam reformingand oxygen storage. Ammonia (NH₃) and new nitrous oxide (N₂O)kinetics were added into the model to study NH₃ and N₂O formationin TWC systems.The model was validated over a wide range of engine operatingconditions using various types of experimental data from a leanburn automotive SIDI engine. First, well-controlled time-resolvedsteady state data were used for calibration and initial modeltests. In these steady state operations, the engine was switchedbetween lean and rich conditions for NOx emissioncontrol. Then, the model was further validated using a large set oftime-averaged steady state data. Temperature dependencies of NH₃and N₂O kinetics in the TWC model were examined and well capturedby the model. Finally, the model was tested in a highly transientFTP drive cycle with cold start conditions. Comparisons between thedata and simulation results indicate that the model is able topredict the experimental data fairly well. The global TWC kineticsin this study are a good starting point for further refinement

Notes:

Vendor supplied data

Publisher Number:

2013-01-1572

Access Restriction:

Restricted for use by site license