摘要
利用车载排放检测仪(SEMTECH)和电子低压冲击仪(ELPI)进行了某非道路风冷非增压柴油机的气态污染物的测量和排放颗粒物粒径及质量分布特征研究。试验按照非道路柴油机排放标准规定的工况进行测量。试验结果表明:试验用非道路柴油机气态污染物中NOx的排放较差;微粒数量排放均成单峰对数正态分布,积聚模态微粒数浓度随负荷增加而增大,随负荷的减小积聚模态的粒径分布向小粒径方向移动,变化规律与车用柴油机相似,但粒径整体要大于车用柴油机;不同粒径微粒的质量呈双峰分布,分别对应积聚模态和粗粒子模态,积聚模态微粒对总质量排放的贡献较大,但与车用柴油机相比分担率有所不同。
With a SEMTECH onboard emission measuring device and an electrical low-pressure impaetor （ELPI） , the gaseous emissions of an off-road air-cooler naturally aspirated diesel engine were measured, and the number and mass weighted size distribution of PM were studied. Based on the test cycle of China off-road emission, the test results showed high NOx concentrations from off-road diesel engine. Meanwhile, the particle number weighted size showed the unimodal and lognormal distributions, and the number of Accumulation Mode particle was increased as engine load is increased. The mean diameter of particle from the off-road engine was larger than that of the vehicle-use engine. However, the mass weighted size of the particle gave the bimodal distribution, corresponding to the Accumulation Mode and the Coarse Mode. The study indicated that Accumulation Mode particle would contribute more to mass, but had different proportion compared with that of the vehicle-use engine.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
2009年第3期237-241,共5页
Transactions of Csice
基金
中国博士后科学基金项目(20070420301)
关键词
非道路柴油机
气态污染物
微粒
粒径分布
质量分布
Off-road diesel engine
Gas pollution
Particle
Size distribution
Mass distribution
