年次大会
Online ISSN : 2424-2667
ISSN-L : 2424-2667
セッションID: G071051
会議情報
G071051 分光測定を用いたノッキング時の末端ガスにおける低温酸化反応挙動の解析([G071-05]エンジンシステム部門,一般セッション(5))
長谷川 智弘石野 賢司飯島 晃良田辺 光昭吉田 幸司庄司 秀夫
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会議録・要旨集 フリー

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抄録
There are strong demands today to further improve the thermal efficiency of internal combustion engines against a backdrop of various environmental issues, including rising carbon dioxide (CO_2) emissions and global warming. One factor that impedes efforts to improve the thermal efficiency of spark ignition engines is the occurrence of knocking. The aim of this study was to elucidate the details of knocking based on spectroscopic measurements and visualization of phenomena in the combustion chamber of a test engine that was operated on two primary reference fuels with different octane ratings (0 MON, 80 MON). The ignition timing was retarded in the experiments to delay the progress of flame propagation, making it easier to capture the behavior of low temperature reactions at the time knocking occurred. Spectroscopic measurements were made at the light emission wavelength and transmitted light wavelength corresponding to those of formaldehyde (HCHO) produced as an intermediate product during a cool flame. Measurements were also made at the light emission wavelength of the OH radical that plays an important role in combustion. As a result, pressure rise by low temperature reaction is considered to be one of the factors affecting knocking intensity.
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© 2013 一般社団法人 日本機械学会
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