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International Journal of Automotive Technology > Volume 6(2); 2005 > Article
International Journal of Automotive Technology 2005;6(2): 119-124.
MEASUREMENT OF SIZE DISTRIBUTION OF DIESEL PARTICLES: EFFECTS OF INSTRUMENTS, DILUTION METHODS, AND MEASURING POSITIONS
H. KIM1, S. LEE2, J. KIM3, G. CHO1, N. SUNG2, Y. JEONG1
1Korea Institute of Machinery and Materials
2Sungkyunkwan University
3Myongji University
ABSTRACT
Size distribution of diesel particles measured by ELPI and SMPS were compared. The results of ELPI and SMPS showed acceptable agreements in the qualitative comparison but showed differences in the quantitative comparison. In addition, the results of ELPI and SMPS showed a same trend about the change of engine loads. In this study, the effects of dilution methods and measuring positions on the measurement of PM size distribution were also studied by using the SMPS. As results, the decrease of large particles and the increase of small particles were observed when the dilution air was heated. It was also observed that the number concentration of the diesel particles was varied within 20% by the different measuring positions of 140 cm.
Key Words: Diesel engine, Particulate matters (PM), Size distribution, ELPI (Electrical Low Pressure Impactor), SMPS (Scanning Mobility Particle Sizer), Dilution, Measuring position
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