摘要
利用ELPI粒径分析仪测定发动机燃用纯柴油、B20和B100的微粒排放特性．燃用生物柴油后发动机排放微粒的总数量增加．与B20和柴油相比，在发动机大部分工作区域内微粒排放都为最高，增加的微粒数量主要来自于超细微粒．燃用B20的微粒排放数量受转速变化影响较为明显，高转速区域和低转速高负荷时排放普遍增多，排放微粒数量较少的区域出现在1400～1600r／min．分析表明：微粒的数量排放和质量排放之间没有必然联系，降低微粒质量的措施不一定能降低微粒的数量，鉴于微粒数量对大气颗粒物的贡献及对人体的危害，有必要对微粒数量排放进行限制．
Electrical low pressure impactor （ELPI） is used to measure the particle emission characteristics of the engine when it is fueled with diesel, B20 and B100. After using the biodiesel, the amount of the particulate emitted by the engine will increase. Compared with B20 and the diesel, the amount of the emitted particulate of biodiesel is the largest in most cases, and the particle over is mainly from the ultrafine particles. The amount of the emitted particle is largely influenced by the rotate speed when the engine is fueled with B20. When in high rotate speed regions, or when in low rotate speed regions but heavily - loaded, the amount of the emitted particulate increases. The region where the amount is lower is at the speed of 1 400 - 1 600 r/min. The research result shows that there is no necessary relationship between the amount of the emitted particle and the mass of the emitted particulate matter. The measurements taken to reduce the mass of the particles may not be able to reduce the amount of particles. Considering that the particles can pollute the atmosphere and is harmful to the human health, it is necessary to restrict the amount of emitted particle.
出处
《车辆与动力技术》
2009年第4期29-32,36,共5页
Vehicle & Power Technology
