Host: The Japan Society of Mechanical Engineers
Name : The Ninth International Conference on Modeling and Diagnostics for Advanced Engine Systems (COMODIA 2017)
Date : July 25, 2017 - July 28, 2017
PM (Particle Matter) emission exhausted from internal combustion engine is one of the major air pollutants, and its reduction in combustion field is strongly required for future development of internal combustion engine. In order to develop effective after-treatment system to reduce the PM exhausted from diesel engine, PM behavior in exhaust line of small size diesel engine was investigated. In this study, PM number and mass concentration distributions were measured along the exhaust line using SMPS (Scanning Mobility Particle Sizer) and LPI (Low Pressure Impactor). PMs of various sizes were captured by LPI. Volatile and non-volatile compositions in captured PM were separated by drying under 120°C and 240°C. In addition, PM behavior and characteristics at the case of exhaust line heating were also measured. As the result, it was shown that number and mass concentrations of larger size PM at downstream part in exhaust line under high speed low load operation was higher than those of the upstream part. Mass concentration of larger size PM in downstream part at heated exhaust line (380°C) was not as high as that of no heating condition. Mass concentration of PM under 70% load operation increased along exhaust line. Especially, smaller size PM at downstream part in exhaust line under 70% load operation was higher than that of the upstream. Further, mass concentration of PM in downstream part at exhaust line heating condition was higher than that of no heating condition. From these results, additional soot composition in PM seems to be formed in the exhaust line under the high temperature line condition.
