Formation Characteristics of Diesel Nanoparticles

Nanoparticles formed in motor vehicle exhaust have received increasing attention due to their potential adverse health effects. But there are a lot of uncertain points for chemical properties and formation mechanisms of diesel nanoparticles. The objective of this study was to characterize nanopartic...

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Bibliographic Details
Published inNihon Kikai Gakkai rombunshuu. B hen Vol. 72; no. 723; pp. 2612 - 2618
Main Authors KUBO, Shuichi, NAKANO, Michio, KONDOH, Teruaki, YAMAMOTO, Masami
Format Journal Article
LanguageJapanese
English
Published The Japan Society of Mechanical Engineers 2006
Subjects
Condensation
Diesel Engine
Diesel Fuel
Hydrocarbons
Nanoparticle
Nucleation
Particulate Matter
Sulfur
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Summary:Nanoparticles formed in motor vehicle exhaust have received increasing attention due to their potential adverse health effects. But there are a lot of uncertain points for chemical properties and formation mechanisms of diesel nanoparticles. The objective of this study was to characterize nanoparticles emitted from a light-duty diesel engine operated on a dynamometer. Diesel nanoparticles which typically range in diameter from 3 to 30 nm were observed only under idling, high load and deceleration conditions. The formation characteristics of diesel nanoparticles under idling and high load conditions depended mainly on fuel distillation characteristics and sulfur content in fuel, respectively while fuel-cut control of fuel injection in deceleration process had a strong influence on those under deceleration condition. Nanoparticles under idling and deceleration conditions were composed mainly of high boiling point hydrocarbons (heavy hydrocarbons) in fuel and/ or lubricating oil and those under high load conditions consisted of sulfuric acid. The formation characteristics of diesel volatile nanoparticles was controlled by number concentration of accumulation mode particles.
ISSN:0387-5016
1884-8346
DOI:10.1299/kikaib.72.2612