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Time-Resolved Particle Size Distributions

Time-resolved particle size distributions (PSD) are essential for understanding the rapid changes in particle emissions from engines. Engine emissions testing requires tools that can measure particle concentrations and size variations in real-time, capturing transient events and providing a detailed profile of exhaust particulates. With high-resolution measurements, researchers gain insight into emission behaviors under different operational conditions, aiding the development of cleaner technologies and compliance with stringent emission standards. TSI’s particle sizing instruments, like the Engine Exhaust Particle Sizers (EEPS™), deliver sub-second response times, allowing researchers to track dynamic changes in PSD, critical for evaluating control technologies and understanding the downwind impacts of combustion processes.

Engine Particle Characterization

Physico-chemical characterization of particles emitted by internal combustion engines allows researchers to understand their structure, morphology, and chemical composition, which significantly influence their behavior and properties. This critical information can help engine manufacturers reduce particle emissions, assist climatologists in developing atmospheric chemistry models, inform public health researchers as to the human health effects of exposure to these particles, and aid aftertreatment manufacturers in designing particle filters to protect heavy equipment operators. The particles have to be sampled in an intelligent way to gather this information, however. MSP, a Division of TSI®, has been an industry leader for over 30 years in developing and manufacturing unique and innovative cascade impactors for size-resolved particle sampling, with applications spanning environmental sources, pharmaceutical aerosols, engine particle emissions, and more.