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| Effect of Tire Treadwear Rate on the Physical Characterization of Tire Wear Particles in Laboratory Measurements | |||||
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| Writer | 관리자 | Date | 2021-04-14 10:46 | Hit | 188 |
Effect of Tire Treadwear Rate on the Physical Characterization of Tire Wear Particles in Laboratory Measurements Abstract Vehicles are one of the main sources of particulate matter (PM) in urban areas. The interest in the human health effects of PM associated with road traffic has been studied to characterize the particles and sources. Many researches focused on exhaust emissions, but recent studies have reported that non-exhaust sources such as road dust, tire wear particles (TWPs) and brake wear particles (BWPs) account for an equal amount of exhaust emissions. Tires generally wear out due to the friction between the tire and the road pavement. Minimizing the tire wear could reduce the non-exhaust emission from the tire. Typically, tire treadwear rate (TWR) is an indicator of the PM from tires. Tires that wear out quicker will produce higher tire PM than a more durable tire. In this study, the effects of tire treadwear rate on the physical properties of TWPs were investigated in laboratory measurements such as tire simulator and chassis dynamometer. A tire simulator installed in an enclosing chamber was employed to eliminate artifacts caused by interfering particles during the generation and measurement of TWPs. The results showed that the higher tire treadwear rate generated lower PM under constant speed conditions. However, there is no obvious correlation between the treadwear rate and PM under slip conditions. Notably, formation of ultrafine particles were observed during the slip conditions.
▶Sources : Journal of Korean Society for Atmospheric Environment Vol. 35, No. 6, December 2019 |
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