過渡運転時におけるディーゼル未燃炭化水素の排出および成分特性 : 熱工学,内燃機関,動力など

概要

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Unburnt HC and its components including 1,3 butadiene and benzene from a DI diesel engine during both start up to warm up" and "increasing load" operations were investigated. At start-up with a high equivalence ratio the THC gradually increased with elapsed cycles, and then decreased sharply with a rapid decrease in equivalence ratio at warm-up operation. Coolant temperature strongly influenced on the THC concentrations and the THC with lower coolant temperature are remarkably higher throughout the "start-up to warm-up". Reducing the equivalence ratio and shortening the duration of high equivalence ratio operation at start-up are effective to reduce THC emission. The lower hydrocarbon components determined the THC behavior for both "start-up to warm-up" and "increasing load" operations, while the proportion of each HC component was not significantly changed. Of the components, ethylene comprised the larger portion of the low hydrocarbon components, 1,3 butadiene and benzene are slightly detected for both transient operations.
一般社団法人日本機械学会の論文
2001-07-25