Emissions Reduction Potential of Extremely High Boost and High EGR Rate for an HSDI Diesel Engine and the Reduction Mechanisms of Exhaust Emissions

Event
SAE World Congress & Exhibition
Authors Abstract
Content
The effects of an increasing boost pressure, a high EGR rate and a high injection pressure on exhaust emissions from an HSDI (High Speed Direct Injection) diesel engine were examined. The mechanisms were then investigated with both in-cylinder observations and 3DCFD coupled with ϕT-map analysis.
Under a high-load condition, increasing the charging efficiency combined with a high injection pressure and a high EGR rate is an effective way to reduce NOx and soot simultaneously, which realized an ultra low NOx of 16ppm at 1.7MPa of IMEP (Indicated Mean Effective Pressure).
The flame temperature with low NOx and low soot emissions is decreased by 260K from that with conventional emissions. Also, the distribution of the fuel-air mixture plot on a ϕT-map is moved away from the NOx and soot formation peninsula, compared to the conventional emissions case.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-01-1189
Pages
13
Citation
Wakisaka, Y., Hotta, Y., Inayoshi, M., Nakakita, K. et al., "Emissions Reduction Potential of Extremely High Boost and High EGR Rate for an HSDI Diesel Engine and the Reduction Mechanisms of Exhaust Emissions," SAE Int. J. Fuels Lubr. 1(1):611-623, 2009, https://doi.org/10.4271/2008-01-1189.
Additional Details
Publisher
Published
Apr 14, 2008
Product Code
2008-01-1189
Content Type
Journal Article
Language
English