ID 375

Reduction of particulate emissions from a direct injection spark ignition engine by using high injection pressure of 50MPa

Yujin Ahn
Department of Mechanical Engineering Undergraduate School of Hanyang University
South Korea

Ziyoung Lee
Department of Mechanical Convergence Engineering Graduate School of Hanyang University
South Korea

Jingeun Song
Department of Mechanical Convergence Engineering Graduate School of Hanyang University
South Korea

Sungwook Park
School of Mechanical Engineering of Hanyang University
South Korea

Abstract:

In this study, investigation of particle number (PN) and soot emissions under wall wetting condition (BTDC 330°) of a direct injection spark ignition engine was conducted by varying the fuel injection pressure from 10MPa to 50MPa. An AC motor and an optical single cylinder engine were utilized to measure particulate and gaseous emissions for various engine operating conditions. Experimental data were acquired under engine operation speed of 1,500rpm, intake flow rate of 130LPM, and fuel mass of 14.145mg/stroke maintaining stoichiometric combustion condition. Results showed that high injection pressure abated the deteriorating effect of spray-wall interaction. The PN and soot were reduced by about 91% and 98% as the injection pressure increased from 10MPa to 50MPa, respectively. The particulate emission levels of wall wetting condition with high injection pressure of 50MPa was even comparable with those of non-wall wetting condition; The fuel film formed under 50MPa injection pressure entirely evaporated before the spark timing.