燃气车PEMS排放测试与发动机台架WHTC测试对比分析  

Comparison between PEMS and Bench WHTC Test for Natural Gas Vehicle

作　　者：张腾 刘兴华[2] 靳航 陈龙 陈占明 韩文涛 ZHANG Teng;LIU Xinghua;JIN Hang;CHEN Long;CHEN Zhanming;HAN Wentao(Weichai Power Co.,Ltd.,Weifang 261061,China;School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing 100081;FAW Automotive Co.,Ltd.,Changchun 130011,China;Chang an Universuty School of Automobile,Xi'an 710064,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061 [2]北京理工大学机械与车辆学院,北京100081 [3]一汽解放汽车有限公司,吉林长春130011 [4]长安大学汽车学院,陕西西安710064

出　　处：《车用发动机》2022年第3期82-87,共6页Vehicle Engine

摘　　要：重型车辆的整车排放测试是国Ⅵ排放法规的重要测试项目之一。以满足国Ⅵ排放法规的重型天然气发动机为研究对象,分别进行发动机台架WHTC循环和整车实际道路排放PEMS测试,并将发动机运行工况、排放测试结果进行对比分析。研究发现,两种排放测试方法发动机运行工况有一定的相似性,但是WHTC循环测试时发动机排温上升较快且过量空气系数波动较小,三元催化器的催化转化效率较高。两种测试方法下污染物排放均满足国Ⅵ排放限值,但是由于发动机运行工况及外界条件的变化,两者之间的排放存在着一定的差异,发动机台架WHTC循环排放值较低,NO_(x)的比排放值相差16.41%,CO排放相差20.2%,THC排放相差15.8%。发动机在进行开发标定时需要兼顾两种工况,对排放留出更宽裕度。The vehicle emission test of heavy vehicle is one of the important test items of ChinaⅥemission regulation.Taking ChinaⅥheavy-duty natural gas engine as the research object,the engine bench WHTC cycle and the PEMS real world emission test were respectively carried out,and the engine operating conditions and emission test results were compared and analyzed.The results show that engine operating conditions of the two methods are similar to some extent,but engine exhaust temperature of WHTC has a quick rise and the excess air coefficient has a little fluctuation so that three-way catalytic converter has high catalytic conversion efficiency.The pollutant emission of both methods can meet the limit requirements of ChinaⅥemission,but a certain difference between them exists due to the change of engine operating conditions and external conditions.The bench WHTC cycle emission is lower and the differences of NO_(x),CO and THC specific emission are 16.41%,20.2%and15.8%respectively.Accordingly,the development and calibration of engine needs to take into account the two operating conditions to leave more allowance for emissions.

关 键 词：重型发动机 天然气发动机 台架试验 实际道路排放 排放测量 

分 类 号：TK43[动力工程及工程热物理—动力机械及工程]