三效催化转化器快速老化过程性能仿真  

Performance Simulation of Fast Aging Process of Three-Way Catalytic Converter

作　　者：龚金科[1,2] 郭华[1,3] 蔡皓[1] 龙罡[1] 

机构地区：[1]湖南大学机械与汽车工程学院,长沙410082 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [3]上海内燃机研究所,上海200438

出　　处：《内燃机工程》2010年第3期100-104,共5页Chinese Internal Combustion Engine Engineering

基　　金：湖南省科技攻关基金项目资助(湘科技[2002]87号);湖南省自然科学基金重点项目(06JJ20018)

摘　　要：基于三效催化转化器详细化学反应机理以及老化机理,建立了包含老化过程的三效催化转化器表面动力学模型,并与CFD软件相耦合,根据100 h快速老化试验条件,建立了三效催化转化器快速老化过程的二维单孔道老化特性模型。对该模型进行数值仿真,得到了特征转化效率随快速老化时间的变化规律以及老化前后三效催化转化器的起燃特性、空燃比特性曲线。结果表明:仿真结果与试验结果基本一致,这为三效催化转化器的老化过程性能分析提供了有效的理论方法。Based on the aging mechanism and the detailed reaction mechanism of three-way catalytic converter （TWC）, a kinetic model of TWC, including aging process, was established. In combination with CFD software, an aging characteristic model of two-dimension single-channel of TWC was established according to fast aging bench test condition. Based on the model, the performance of TWC was simulated. The characteristic conversion efficiency as a function of aging time as well as light off characteristics ~ air fuel ratio characteristics before and after aging were obtained. The simulated results were in agreement with the bench test result. This simulation can provide an effective theory method for analyzing the performance of TWC aging process.

关 键 词：内燃机 三效催化转化器 反应机理 老化机理 快速老化 性能仿真 

分 类 号：TK411.5[动力工程及工程热物理—动力机械及工程]