循环测量工况下汽油车颗粒物排放试验研究  

An Experimental Study on the Particulate Emission from Gasoline Vehicles Under Cycle Test Conditions

作　　者：王凤滨[1] 包俊江[2] 乔维高[1] 高俊华[2] 

机构地区：[1]武汉理工大学汽车工程学院,武汉430070 [2]中国汽车技术研究中心,天津300162

出　　处：《汽车工程》2009年第8期737-740,共4页Automotive Engineering

摘　　要：利用电子低压冲击仪对4辆采用不同技术的国Ⅳ排放汽油车进行了颗粒物分布特性的试验研究。试验按照国Ⅳ测试循环(NEDC)在转鼓试验台上进行,测量了冷启动下排气中颗粒物的特性分布。试验结果表明:汽油机排气中包含有大量的超细颗粒物,其中以0.02～0.5μm的粒子居多;颗粒物排放主要在NEDC循环的冷启动阶段和加速过程中产生;汽油直接喷射车辆颗粒物数量比气道汽油喷射的高。An experimental study on the distribution characteristics of particulates emitted from 4 gasoline vehicles with different technologies for State-iV emission standard is conducted using electrical low-pressure impactor （ELPI）. The test is performed on chassis dynamometer with State-Ⅳ test cycle （equivalent to European NEDC） and the distribution of exhaust particulates at cold start condition is measured. Test results show that there are a great number of ultra-fine particulates in gasoline engine exhaust gas, most of which are with a size between 0. 02 μm and 0. 5 μm; the particulates is generated mainly in the phases of cold-start and acceleration of NEDC; and the number of particulates emitted from gasoline direct injection vehicle is more than that from vehicle with port fuel injection.

关 键 词：汽油车 颗粒物排放 电子低压冲击仪 

分 类 号：U467.48[机械工程—车辆工程]