Empirical Study of Energy in Diesel Combustion Emissions with EGR Application
2011-01-1817
08/30/2011
- Event
- Content
- Modern diesel engines were known for producing ultra-low levels of hydrogen and hydrocarbons. However, as emission control techniques such as exhaust gas recirculation (EGR) are implemented to meet stringent NOx standards, the resulting increase in partial-combustion products can be significant in quantity both as pollutants and sources of lost engine efficiency. In this work, a modern common-rail diesel engine was configured to investigate the EGR threshold for elevated carbon monoxide, hydrocarbon, and hydrogen emissions at fixed loads and fixed heat-release phasing. It is noted that increase in hydrocarbons, in particular light hydrocarbons (such as methane, ethylene, and acetylene) was concurrent with ultra-low NOx emissions. Hydrogen gas can be emitted in significant quantities with the application of very high EGR. Under ultra-low NOx production conditions for medium and high load conditions, the light hydrocarbon species can account for the majority of hydrocarbon emissions.
- Pages
- 8
- Citation
- Xie, K., Han, X., Asad, U., Reader, G. et al., "Empirical Study of Energy in Diesel Combustion Emissions with EGR Application," SAE Technical Paper 2011-01-1817, 2011, https://doi.org/10.4271/2011-01-1817.