着火遅れ制御下におけるベンゼン系・n-ヘキサン混合燃料のディーゼル排気特性

抄録

The influence of the aromatic content in fuels on the soot and NO_x emissions from a diesel engine was analyzed under controlled ignition lags with spark-assisted operation. Benzene-hexane mixtures and other hydrocarbons were used in the tests. The experiments showed that, regardless of the molecular structure, the soot concentration in the exhaust was described by a linear-combination function with two variables of ignition lags and C/H ratio of the fuels. With increased C/H ratios, the soot emission increased more for higher equivalence ratios at unchanged ignition lag. The NO_x emission increased slightly with an increase in the C/H ratio and ignition lag.