メタノール直接噴射による予混合圧縮着火機関の燃焼制御と運転領域拡大(熱工学,内燃機関,動力など)

概要

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The control of ignition timing, the suppression of rapid combustion, and the expansion of stable operating range upto higher load maintaining ultra low NO_x and smokeless combustion were achieved by direct methanol injection in a premixed charge compression ignition engine. The combustion suppression effect increased with advancing methanol injection timing as the methanol widely distributed in combustion chamber. With increasing in methanol injection amount, the onset of low temperature oxidation delayed and the heat release in the low temperature oxidation decreased. This reduction of low temperature oxidation resulted in suppression of the temperature rise before the onset of high temperature oxidation, then delayed the onset of high temperature oxidation, and suppressed the rapid combustion. At high load the fraction of methanol injection amount have to be more than 50% to achieve normal combustion without too early ignition and knocking. Flame luminosities during the low and high temperature oxidations decreased with methanol injection.
一般社団法人日本機械学会の論文
2003-06-25