排气歧管结构型式对整车HC排放的影响  

Influence of Exhaust Manifold Structure Type on Vehicle HC Emission

作　　者：吴喜庆 崔振伟 王亚飞 夏铭希 马荣勇 韩艳辉 

机构地区：[1]中国第一汽车股份有限公司天津技术开发分公司 [2]中国第一汽车股份有限公司技术中心

出　　处：《汽车工程师》2017年第2期25-27,共3页Automotive Engineer

摘　　要：为了分析排气歧管的结构型式和氧传感器的布置位置对整车碳氢(HC)排放的影响,通过整车I型试验分析得出,蚌壳式和弯管式排气歧管结构型式及其在冷启动阶段触媒温度上升的快慢是造成HC排放差异的主要原因。并通过三维模拟计算,分析了2种排气歧管的整体流场和前氧传感器位置的气流分布对整车HC排放方面的影响,分析结果表明蚌壳式排气歧管在HC排放上优于弯管式排气歧管,满足了减少整车HC排放要求。In type I test, the structures of mussel type and bending type exhaust manifold and the temperature rising speed is the main reason for the differenee of HC emission during cold start in order to analyze the effect of the exhaust manifold structure type and the arrangement position of oxygen sensor on vehicle HC emission. The influence of overall flow field of 2 kinds of exhaust manifolds and air flow distribution in the front of oxygen sensor on vehicle HC emission is analyzed by 3D simulation, the results show that the pefformanee of mussel type exhaust manifold is better than bending exhaust manifold on HC emission, meeting the requirements of reducing vehicle HC emission.

关 键 词：排气歧管 HC排放 冷启动 触媒温度 氧传感器 

分 类 号：U464.134.4[机械工程—车辆工程]