Study of the effects on exhaust emissions in direct injection diesel engines: effects of fuel injection system, distillation properties and cetane number

摘要

The effect of injection nozzle, diesel fuel density (volatility) and cetane number on diesel exhaustemissions were investigated. Decreasing injection nozzle hole diameter decreases PM emission.However, a small nozzle hole increases NO{sub}x emission and decreases the effect of fuel on PMemission. Decreasing fuel density is effective for reduction of NO{sub}x emission. But the effect issmaller than that of nozzle hole diameter and injection pressure. Furthermore injection timingretardation decreases the effect of fuel density on NO{sub}x emission.