| 闭环控制系统空燃比波动对三效催化剂活性的影响 |
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| 引用本文： | 李俊,王建昕,肖建华,庄人隽,杨伟东. 闭环控制系统空燃比波动对三效催化剂活性的影响[J]. 汽车工程, 2000, 22(2): 134-138 |
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| 作者姓名： | 李俊 王建昕 肖建华 庄人隽 杨伟东 |
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| 作者单位： | 清华大学,汽车安全与节能国家重点实验室 |
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| 摘 要： | 通过对国外资料的考察分析，论述了空经波动对车用三效催化剂活性的影响，在催化剂与电喷发动机的匹配中，必须考虑催化剂的动态特性。对催化剂的动态性能和静态性能进行了试验对比，并针对不同幅值和频率的空燃比波动对催化剂性能的影响进行了试验研究。结果表明催化剂在动态的性能好于静态；随空燃比叔动幅值的增大，催化剂选择窗口变宽。
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| 关 键 词： | 空燃比波动 闭环控制系统 汽车 三效催化剂 |
Effect of A/F Ratio Fluctuation in a Closed-loop Control System on Conversion Efficiency of Three-way Catalyst |
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| Li Jun,Wang Jianxin,Xiao Jianhua,Zhuang Renjun,Yang Weidong. Effect of A/F Ratio Fluctuation in a Closed-loop Control System on Conversion Efficiency of Three-way Catalyst[J]. Automotive Engineering, 2000, 22(2): 134-138 |
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| Authors: | Li Jun Wang Jianxin Xiao Jianhua Zhuang Renjun Yang Weidong |
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| Affiliation: | Li Jun,Wang Jianxin,Xiao Jianhua,Zhuang Renjun,Yang Weidong;(Tsinghua University, State Key Laboratory of Automobile Safety and Energy Conservation) |
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| Abstract: | Based on the review and analysis of foreign researches, the paper presented the effet of A/F ratio fluctuation on conversion efficiency of three way catalyst. The dynamic performance of catalyst must be evaluated when it is to match with engine. The difference between dynamic performance and static performance of catalyst is studied by test. And the effect of A/F ratio fluctuation with difference amplitude and frequency has been studied. The results show that dynamic performance of catalyst is better than static performance and the selection window will be widen when the amplitude of A/F ratio fluctuation is enlarged. |
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| Keywords: | Automotive catalyst A/F ratio fluctuation Selection window |
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