马 标

（安徽江淮汽车股份有限公司技术中心，安徽 合肥 230601）

摘要:为了满足国家轻型车排放限值以及耐久性监管要求，强化对三元催化器（TWC）的热老化考核，通过阿累尼乌斯（Arrhenius）方程分析了高温对TWC耐久性的影响，建立了TWC实车道路老化和台架快速老化的等效关系。利用试验车的实车道路耐久温度曲线，计算TWC快速老化时间，并进行试验车排放试验验证。结果表明，快速老化排放和16万公里实车道路排放偏差在10%以内，安装等效老化后的TWC的试验车排放满足国Ⅴ限值要求，并留有一定的裕度。

关键词：三元催化器；老化等效机理；实车道路老化；快速老化

Abstract: In order to meet the national emission limits and durability monitoring requirements, as well as to emphasize the evaluation of three-way catalyst (TWC) thermal aging, equivalent relationship between vehicle road aging and test-bench accelerated aging was established by analyzing the impact of high temperature on TWC durability using Arrhenius formula. TWC accelerated aging time was calculated using the temperature curve from vehicle road testing, and validation testing of the vehicle emission when equipped with the aged catalyst was carried out. The results show that the difference in emissions between using the accelerated aged TWC and using the TWC after 160k km road testing is within 10%. Vehicle equipped with the accelerated aging TWC meets the China V emissions limits with certain margin.

Keywords: Three-Way Catalyst；Equivalent Aging Mechanism；Vehicle Road Aging；Accelerated Aging；