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EGR gas composition effects on ignition delays in diesel combustion

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Title: EGR gas composition effects on ignition delays in diesel combustion
Authors: Kobashi, Yoshimitsu Browse this author →KAKEN DB
Todokoro, Masaki Browse this author
Shibata, Gen Browse this author
Ogawa, Hideyuki Browse this author →KAKEN DB
Mori, Toshihiro Browse this author
Imai, Daichi Browse this author
Keywords: Ignition delay
Exhaust gas recirculation
Diesel engine
Nitrogen oxide
Issue Date: 1-Dec-2020
Publisher: Elsevier
Journal Title: Fuel
Volume: 281
Start Page: 118730
Publisher DOI: 10.1016/j.fuel.2020.118730
Abstract: This paper presents the effects on ignition delays of a range of exhaust gas compositions recirculated in the intake air. The ignition delays were measured in a single-cylinder diesel engine introducing a variety of hydrocarbons, nitrogen oxides (NOx), and carbon monoxide (CO) into the intake gas, and changing the concentrations of these components. The experimental results show that the ignition delay decreases with the NOx addition, NO2 promotes the ignition more than NO, and this effect is more pronounced at higher intake gas temperatures. The ignition delay decreases with HC addition under NOx rich conditions while there is little effect under low NOx conditions, and the ignition delay changes with the kinds of hydrocarbons. The CO has little effect on the ignition delay. With the aid of chemical reaction analysis, the mechanisms of these changes are elucidated.
Rights: © <2020>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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