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Emissions Trade-Off and Combustion Characteristics of a High-Speed Direct Injection Diesel Engine
Technical Paper
2001-01-0197
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2001 World Congress
Language:
English
Abstract
The emissions trade-off and combustion characteristics of a high speed, small-bore, direct injection, single cylinder, diesel engine are investigated at three different load conditions. The experiments covered a wide range of parameters including the injection pressure, exhaust gas recirculation (EGR) rate and swirl ratio (Sw). The effects of each parameter on the ignition delay (ID), apparent rate of energy release (ARER), NOx, Bosch smoke unit (BSU), CO and hydrocarbons are investigated. The results show that the NOx emission dropped continuously with the increase in EGR (up to 55%), but with increasing smoke emission in a classical trade-off relationship. The increase in injection pressure generally reduced smoke with NOx penalty; however, the NOx penalty decreased at higher EGR. There also appears to be an increase in the cool flame intensity at the high EGR rates. Applying swirl at high EGR rate and high injection pressure conditions further reduced smoke emissions.
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Citation
Henein, N., Lai, M., Singh, I., Wang, D. et al., "Emissions Trade-Off and Combustion Characteristics of a High-Speed Direct Injection Diesel Engine," SAE Technical Paper 2001-01-0197, 2001, https://doi.org/10.4271/2001-01-0197.Also In
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