Yongjin Jung

TL;DR: In this article, the effects of the injection pressure and injection timing on the combustion and emission characteristics in a single-cylinder common-rail direct injection (CRDI) diesel engine fueled with waste cooking oil (WCO) biodiesel and commercial diesel fuel were investigated.

TL;DR: In this paper, the spray and combustion characteristics of gasoline and diesel were investigated in a direct injection compression ignition engine equipped with a common rail injection system under a constant volume chamber and under an evaporating condition in an optical engine.

TL;DR: In this article, the performance of the combined catalytic reduction (SCR) system was investigated under operating conditions of engine loads and speeds in a 3.4-liter diesel engine, and the results from the combined catalyst were compared with those from vanadium-based and Cu-zeolite catalysts alone.

TL;DR: In this article, the exhaust gas of a single-cylinder direct-injection compression-ignition engine was investigated by thermogravimetric analysis (TGA), elemental analysis, and transmission electron microscopy (TEM), and two fuels were used: biodiesel derived from waste cooking oil and commercial diesel fuel.

TL;DR: In this article, the authors investigated NO and NO2 emissions over urea-based selective catalytic reduction (SCR) systems in a nonroad diesel engine, where two types of metal ion-exchanged zeolites were used; one is Fe, the other is Cu.