Total Cylinder Sampling from a Diesel Engine: Part III - Particle Measurements 830243
Particle formation, growth, coagulation and combustion in the cylinder of an indirect injection passenger car type diesel engine have been studied using a system which allows the cylinder contents to be rapidly expelled through a blowdown port, diluted, and collected in a sample bag for subsequent analysis. Characteristic blowdown times were about 0.5 ms. Samples were analyzed using a condensation nuclei counter to determine particle number concentrations and an electrical aerosol analyzer to determine particle volume concentrations in the 0.01 to 1.0 μm diameter range.
Measurements were made with the engine operating at 1000 rpm and an equivalence ratio of 0.32. Peak particle number concentration in the cylinder 13 times the exhaust level, and peak particle volume (or mass) concentration in the cylinder 3 times the exhaust level were observed. These results suggest that significant particle coagulation and oxidation occur during the expansion stroke.
Citation: Du, C. and Kittelson, D., "Total Cylinder Sampling from a Diesel Engine: Part III - Particle Measurements," SAE Technical Paper 830243, 1983, https://doi.org/10.4271/830243. Download Citation
Author(s):
Cao Jian Du, David B. Kittelson
Affiliated:
Dept. of Mechanical Engineering, University of Minnesota (On leave from the Department of Research and Development, Shanghai Diesel Engine Works, Shanghai, People’s Republic of China)
Pages: 20
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Diesel / compression ignition engines
Engine cylinders
Particulate matter (PM)
Combustion and combustion processes
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