乘用车汽油机实际道路行驶中NO排放穿透现象与机理分析  

Analysis on the Penetration Phenomenon and Mechanism of NO Emissions from Gasoline Engines of Passenger Cars in Actual Road Driving

作　　者：寇英杰 张永浩 胡宗杰[2] 范宝庆 吴宁 沈源 李理光[1,2] 

机构地区：[1]同济大学中德学院,上海 [2]同济大学汽车学院,上海 [3]吉利汽车动力研究院,浙江 宁波

出　　处：《环境保护前沿》2021年第2期380-390,共11页Advances in Environmental Protection

摘　　要：为了满足将在中国正式实施的国家六b排放法规的要求,减少实际道路条件下的瞬态排放是其有效措施之一。本文针对实际道路条件下的NO排放特性,以一款在中国市场出售的轻型汽油车为研究对象,使用NO快速采样分析仪作为车载测量设备,对该车实际道路运行下三效催化反应器(TWC)前后的NO排放浓度进行采样和分析。研究发现,换挡瞬态过程是导致瞬时NOx排放升高的重要因素:换挡的同时若不踩油门踏板,排气管则出现NOx瞬时峰值。基于对换档和燃油切断条件的数据分析,提出采用NOx瞬态排放的优化控制策略减少车辆在实际道路上的NOx排放的方法。In order to meet the requirements of the national 6b emission regulations that will be officially implemented in China, reducing transient emissions under actual road conditions is one of its ef-fective measures. For this article, aiming at the characteristics of NO emission under actual road conditions, a light gasoline vehicle sold in the Chinese market as the research object, the NO fast sampling analyzer is used as a vehicle-mounted measurement device. The NO emission concentra-tion before and after the three-way catalytic reactor is sampled and analyzed on the actual road. Studies have found that the transient process of shifting is an important factor leading to the in-crease of instantaneous NOx emissions: if you do not step on the accelerator pedal while shifting, the exhaust pipe will have an instantaneous peak of NOx. Based on the data analysis of gear shift and fuel cut-off conditions, an optimized control strategy for NOx transient emissions is proposed to reduce the NOx emissions of vehicles on actual roads.

关 键 词：轻型汽油车 实际道路条件 车载瞬态测量 NO_x排放 

分 类 号：U46[机械工程—车辆工程]