Technical Paper
Analysis and Prediction of in Cylinder NOx Emissions for Lean Burn CNG/H2 Transit Bus Engines
2004-06-08
2004-01-1994
In the immediate future the introduction of a wider variety of fuel types will play a significant role in reducing emissions and in solving the energy needs of the transportation industry. Both compressed natural gas, CNG, and hydrogen are expected to play significant roles, and the present paper shows that these fuels, when used together, can offer large benefits in NOx emissions. Significant reductions in NOx emissions will be required for CNG transit buses and heavy duty trucks, if they are to meet the future stringent emissions standards that come into effect in the year 2007. In the present paper we have applied a newly developed engine model with detailed chemical reactions to predict the “in cylinder” production to NOx under realistic engine conditions.
