Modeling the Effects of EGR and Injection Pressure on Emissions in a High-Speed Direct-Injection Diesel Engine 2001-01-1004
Experimental data is used in conjunction with multi-dimensional modeling in a modified version of the KIVA-3V code to characterize the emissions behavior of a high-speed, direct-injection diesel engine. Injection pressure and EGR are varied across a range of typical small-bore diesel operating conditions and the resulting soot-NOx tradeoff is analyzed. Good agreement is obtained between experimental and modeling trends; the HSDI engine shows increasing soot and decreasing NOx with higher EGR and lower injection pressure. The model also indicates that most of the NOx is formed in the region where the bulk of the initial heat release first takes place, both for zero and high EGR cases. The mechanism of NOx reduction with high EGR is shown to be primarily through a decrease in thermal NOx formation rate.
Citation: Richards, K., Subramaniam, M., Reitz, R., Lai, M. et al., "Modeling the Effects of EGR and Injection Pressure on Emissions in a High-Speed Direct-Injection Diesel Engine," SAE Technical Paper 2001-01-1004, 2001, https://doi.org/10.4271/2001-01-1004. Download Citation
K. J. Richards, M. N. Subramaniam, Rolf D. Reitz, Ming-Chia Lai, N. A. Henein, Paul C. Miles
Engine Research Center, University of Wisconsin-Madison, Wayne State University, Sandia National Laboratories
SAE 2001 World Congress
Multi-Dimensional Engine Modeling 2001-SP-1604, SAE 2001 Transactions Journal of Fuels and Lubricants-V110-4