Effect of High Turbulence Mixing on Reduction of Exhaust Emissions from a DI Diesel Engine Employing EGR and Pilot Injection 18ICES/063
Authors
Shingo Okamoto - The University of Tokushima
Ryota Shibamoto - Hino Motors, Ltd.
Yoshiyuki Kidoguchi - The University of Tokushima
Kei Miwa - The University of Tokushima
Abstract
This study tried to reduce exhaust emissions from DI diesel engines. Effects of high turbulence combustion applied by EGR and pilot injection was investigated. High turbulence combustion using high squish combustion chamber can reduce NOX with less deterioration of particulate emissions. At high load, EGR is effective to reduce NOX. Early timing of pilot injection forms a large number of pre-mixture before main injection due to high turbulence mixing, leading to lower pressure-rise at initial burning and lower particulate emissions. At medium and low load, EGR is effective to NOX reduction although pilot injection produces high particulate and THC emissions.