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Expansion of Operating Range and Reduction of Engine out Emission in Low Temperature Diesel Combustion with Boosting  

Shim, Eui-Joon (Department of Mechanical Engineering, KAIST)
Han, Sang-Wook (Department of Mechanical Engineering, KAIST)
Jang, Jin-Young (Department of Mechanical Engineering, KAIST)
Park, Jung-Seo (Department of Mechanical Engineering, KAIST)
Bae, Choong-Sik (Department of Mechanical Engineering, KAIST)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.17, no.5, 2009 , pp. 31-38 More about this Journal
Abstract
Supercharging system was adopted to investigate the influence of boost pressure on operating range and exhaust emissions by using a supercharger at low temperature diesel combustion (LTC) condition in a 5-cylinder 2.7 L direct injection diesel engine. The experimental parameters such as injection quantity, injection timing, injection pressure and exhaust gas recirculation (EGR) rate were varied to find maximum operating range in LTC condition. As a result of adopting increased boost pressure in LTC, wider operating range was achieved compared with naturally aspirated condition due to increased mixing intensity. Increased boost pressure resulted in lower hydrocarbon (HC) and carbon monoxide (CO) emissions due to increased swirl rate and mixing intensity, which induced complete combustion. Moreover, increased boost pressure in LTC resulted in much lower soot emissions compared with high speed direct injection (HSDI) condition.
Keywords
Low temperature diesel combustion(LTC); Exhaust gas recirculation(EGR); High speed direct injection(HSDI); Supercharge; Nitrogen oxides(NOx); Soot;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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