柴油质量对柴油机排放的影响  

Effect of Diesel Fuel Quality on Emission from a Diesel Engine

作　　者：王志伟[1] 杜宝程[1] 蒋习军[1] 

机构地区：[1]中国汽车工程研究院车辆排放与节能重庆市重点实验室,重庆400039

出　　处：《重庆工学院学报（自然科学版）》2008年第8期17-21,共5页Journal of Chongqing Institute of Technology

基　　金：重庆市科技计划攻关项目(2005AB6017)

摘　　要：阐述了柴油规范要求和国内现状,利用2种柴油进行排放对比试验,研究柴油十六烷值和硫含量对柴油机排放的影响.试验结果表明:十六烷值越高,柴油的着火性能越好,着火延迟期越短,可燃混合气燃烧改善,CO排放生成机率降低,燃烧初期缸内峰值温度降低,缸内NOx生成时间相对缩短,NOx排放会降低,导致局部区域不完全燃烧,使THC排放增加;硫含量越高生成的颗粒物排放也越高.This paper introduces the regulations on diesel fuel and the present domestic situations. Through the emission tests with two kinds of diesel fuel, the effect of cetane number and sulfur on emission from a diesel engine is studied and analyzed. The results show that with higher cetane number, Diesel fuel＇ s igni- tion performance becomes better and its ignition delay becomes shorter, combustible mixed gases＇ combustion is improved, the rate of CO emission lowers, peak temperature inside the cylinder decreases, NOx forming time shortens relatively, resulting in local incomplete combustion and THC emission increase; and the higher sulfur content is, the higher chances of particle emission.

关 键 词：柴油质量 排放 柴油机 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]