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Hydrogen as an ignition-controlling agent for HCCI combustion engine by suppressing the low-temperature oxidation

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Title: Hydrogen as an ignition-controlling agent for HCCI combustion engine by suppressing the low-temperature oxidation
Authors: Shudo, Toshio Browse this author
Yamada, Hiroyuki Browse this author
Keywords: Internal combustion engine
HCCI
Ignition control
Low-temperature oxidation
DME
Issue Date: Sep-2007
Publisher: Elsevier Ltd.
Journal Title: International Journal of Hydrogen Energy
Volume: 32
Issue: 14
Start Page: 3066
End Page: 3072
Publisher DOI: 10.1016/j.ijhydene.2006.12.002
Abstract: Homogeneous charge compression ignition (HCCI) combustion enables internal combustion engines to achieve higher thermal efficiency and lower NOx emission than with conventional combustion systems. Controlling the ignition timing in accordance with the operating conditions is crucial for utilizing HCCI combustion engines. Adding hydrogen-containing gas is known to retard the autoignition of dimethyl ether (DME) considerably. The effective ignition control by hydrogen can expand the operation range of equivalence ratios and engine loads in HCCI combustion. This research investigated the mechanisms in the ignition control by the chemical kinetics analysis. The results show that the retarded ignition can be attributed to a consumption of OH by hydrogen during low-temperature oxidation of DME. The decreased OH concentration leads to retarded heat release and delays the onset of the high-temperature oxidation.
Relation: http://www.sciencedirect.com/science/journal/03603199
Type: article (author version)
URI: http://hdl.handle.net/2115/30292
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)

Submitter: 首藤 登志夫

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