Transactions of Society of Automotive Engineers of Japan
Online ISSN : 1883-0811
Print ISSN : 0287-8321
ISSN-L : 0287-8321
Study of Mechanism Producing Multi-Stage Heat Release in Supercharged HCCI Using Blended Fuel
-Reaction Analyses by FTIR Method, In-cylinder Spectroscopy and Chemical Kinetic Simulation-
Akira IijimaMitsuo AsanumaKiyoshi KomatsuRyosuke ShimizuKoji YoshidaHideo Shoji
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2012 Volume 43 Issue 2 Pages 337-343

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Abstract
This study investigated the mechanism producing the multi-stage heat release behavior of a supercharged HCCI engine operated on blended fuels of DME and methane. These aspects were investigated by making spectroscopic measurements of in-cylinder gas, FTIR analysis of intermediate products and by conducting chemical kinetic analyses. The results revealed that the DME is mainly consumed during cool flame and accumulate HCHO. In addition, in the first-stage heat release of the main combustion, HCHO is consumed and CO is produced. Meanwhile, methane is not appreciably consumed in the first-stage heat release of the main combustion and consumed just prior to the second-stage heat release. That explains why the heat release of the hot flame occurred in two distinct stages.
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© 2012 Society of Automotive Engineers of Japan, Inc.
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