高海拔地区载荷对重型柴油车NOx排放的影响

The Influence of Load on NOx Emission of Heavy-duty Diesel Vehicles in High Altitude Areas

按照国家标准GB 17691-2018《重型柴油车污染物排放限值及测量方法(中国第六阶段)》要求,重型柴油车需进行PEMS试验时,试验条件范围增加。它不仅要求进行高海拔地区的排放试验,试验载荷也扩展至10%~100%;因此,车辆在进行PEMS试验时,需尽可能地按照严苛的条件进行。本文介绍了在高海拔地区分别进行低载荷和高载荷状态下的PEMS试验,对试验结果进行分析计算,总结出在高海拔地区不同载荷对排放的影响。

According to the requirements of the national standard GB17691-2018“Pollutant Emission Limits and Measurement Methods for Heavy-Duty Diesel Vehicles(China Phase Vi)”,when heavy-duty diesel vehicles need to undergo PEMS tests,the scope of test conditions is increased.Not only does it require emission tests at high altitudes,but the test load is also extended to 10%to 100%,Therefore,when the vehicle conducts PEMS tests,it is necessary to follow the strict conditions as much as possible.In this paper,the PEMS test under low load and high load is carried out in the high altitude area,and the test results are analyzed and calculated,and the effects of different loads on emissions in the high altitude area are summarized.