乘用车未燃碳氢化合物排放规律解析

基于乘用车汽油发动机未燃碳氢化合物排放产生机理分析，根据某型乘用车怠速HC排放实测样本数据，分析并研究了HC排放的统计规律，建立了描述这种统计规律的分布函数与分布密度函数数学模型。验证表明，利用所建数学模型得到的计算结果与样本实测结果高度吻合。在此基础上，提出了修改在用汽车排气污染物限值国家标准的具体建议，并指出应强化I／M制度以有效地控制在用汽车的排放污染。

Emission Law Analysis of Passenger Cars' Unburned Hydrocarbon

Based on the producing mechanism analysis of unburned hydrocarbon emission exhausted by gasoline engines, and the actual detected HC emission sample data of a given type passenger cars on idle condition, the statistical laws of HC emission have been researched, the distribution function and the distribution density function models used to describe these laws have been established too. Checking computation showed that the calculating results got by the models have very high calculating precision. On the basis of above - mentioned research, the specific proposals have been put forward to revise the relevant limit values of Chinese national standard about in - use passenger cars exhaust pollutant, and I/M program should be enforced in order to control the exhaust pollution of in - use vehicles efficiently.