Parameters That Affect the Impact of Auxiliary Gas Injection in a DI Diesel Engine

2000-01-0233

03/06/2000

Event
SAE 2000 World Congress
Authors Abstract
Content
The authors used auxiliary gas injection (AGI) to increase in-cylinder mixing during the latter portion of combustion in a direct injection (DI) diesel engine in order to reduce soot emissions without affecting NOx. Experiments were conducted using various gas injection directions and compositions to explore the effect of these parameters. Simulations were employed to provide additional insight. AGI direction was found to have a profound impact on soot emissions. Researchers suggested that this was due to changes in the fuel spray-gas jet interaction with injection direction. Simulations supported this theory and suggested that the number of soot clouds affected by the gas jet may also be a factor. The oxygen content of the gas jet was also found to have an influence on emissions. Researchers found that, when the oxygen content of the gas jet was increased, soot emissions decreased. However, this was found to have a detrimental affect on NO. This was believed to stem from the fact that a portion of the injected gas was entrained causing it to have a direct impact on the composition inside the fuel spray where most of the soot chemistry takes place.
Meta TagsDetails
DOI
https://doi.org/10.4271/2000-01-0233
Pages
11
Citation
Kurtz, E., Mather, D., and Foster, D., "Parameters That Affect the Impact of Auxiliary Gas Injection in a DI Diesel Engine," SAE Technical Paper 2000-01-0233, 2000, https://doi.org/10.4271/2000-01-0233.
Additional Details
Publisher
Published
Mar 6, 2000
Product Code
2000-01-0233
Content Type
Technical Paper
Language
English