Relationships Between Smoke Measurements and Particulate Measurements

This study explored the relationships among particulate and carbon concentrations, and Bosch smoke number. The experiments were made on a 0.72-L, single-cylinder, divided-chamber, diesel engine. The Bosch smoke number correlates well with the carbon concentration and, to a lesser degree, with the particulate concentration. The theoretically based correlation established in this study between carbon concentration and Bosch smoke number agrees with several past correlations obtained in large, open-chamber diesel engines. Finally, no relationship was evident between the volatile concentration of particulates and the exhaust hydrocarbon concentration.