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Effects of Engine Loads on Exhaust Emissions and Particulate Matter with Morphological Characteristics in a Common Rail 4 Cylinder Diesel Engine  

Roh, Hyun-Gu (Induk, University, Department of Mechanical & Automobile Engineering)
Choi, Seuk-Cheun (Korea Instititute of Industrial Technology, Korea National Cleaner Production Center, Green Management Planning Office)
Lee, Chang-Sik (Hanyang, University, Department of Mechanical Engineering)
Publication Information
Journal of the Korean Society of Combustion / v.15, no.3, 2010 , pp. 57-66 More about this Journal
Abstract
The purpose of this paper is to investigate the effects of fuel injection strategy and engine load on the structure and emissions characteristics of a DI diesel engine with 1.6L of piston displacement. In order to analyze the particulate matter (PM) and exhaust emissions characteristics in a direct injection diesel engine, the quantity of PM and exhaust emissions (including HC, CO and $NO_X$) were investigated under various injection strategies and engine loads. Two different injection strategies (one pilot/main injection and two pilots/main injection) was investigated under the various engine loads. A thermophoretic sampling method with a scanning electron microscope (SEM) were used to obtain the PM morphology (including primary particles, the size of the agglomerates, the number of agglomerates, the fractal dimension). The quantity of soot gradually increased with increasing engine load at both injection strategies. The primary particles in the PM agglomerates indicate that the average of the primary particle and radius of gyration increased as the engine load increased.
Keywords
Diesel engine; Engine load; Injection strategy; PM morphology and Injection strategy;
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