直接噴射式メタノール機関の過給時の性能と燃焼特性

概要

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Effects of supercharging on a engine performance and exhaust emissions in a spark-assisted direct injection methanol engine were investigated under heavy load conditions. The test results indicated that the supercharging has the effects of improving thermal efficiency, CO and NO_x emissions. The combustion analyses showed that the supercharging suppress a rapid combustion of stratified mixture which include fuel spray drop, and makes contributions to promote premixture with rapid fuel spray evaporating and fuel-air mixing. As a result, supercharging increased heat release during the premixed combustion. In addition, increasing of premixed combustion with the supercharging reduced the deterioration of brake thermal efficiency during the EGR under heavy load conditions. The supercharging with EGR can significantly reduce the NO_x emissions while keeping the high thermal efficiency as direct injection diesel engines.
社団法人日本機械学会の論文
1998-05-25