325 内部EGRによる天然ガス予混合圧縮着火機関の性能向上(OS-1 天然ガス予混合圧縮着火機関,研究発表講演)

概要

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In order to decrease a required intake temperature for a premixed charge compression ignition engine fuelled by natural gas, the internal EGR was conducted by pilot opening of an intake valve at the beginning of the exhaust stroke. A part of burnt gas with a high temperature was directly introduced into a suction pipe through an intake valve. It was shown that the auto ignition is stabilized by the EGR especially under the relatively low fuel-quantity condition due to an increase in a gas temperature at the beginning of compression stroke. As a result, in the case with EGR rate of about 20%, the same value of maximum IMEP can be produced as the case without EGR, while the fuel consumption with EGR is smaller than that without it.
一般社団法人日本機械学会の論文
2005-03-18