大型公交车实际行驶排放评价CO2窗口法的设计与应用  

Design & Application of CO2-Based Window Method in RDE Evaluation of Large Bus

作　　者：彭美春[1] 廖清睿 谢焕宁 Peng Meichun;Liao Qingrui;Xie Huanning(Guangdong University of Technology,Guangzhou 510006)

机构地区：[1]广东工业大学,广州510006

出　　处：《汽车技术》2020年第5期55-58,共4页Automobile Technology

基　　金：2015年广州市交通行业节能专项资金项目(穗交函[2015]892号)。

摘　　要：设计了大型公交车实际行驶排放(RDE)评价CO2窗口法,以欧洲瞬态循环(ETC)工况的CO2排放量确定窗口大小,拟合发动机有效功率与CO2排放速率的线性关系式,提出以窗口平均CO2排放速率占比判断有效窗口的方法,推导出CO2窗口排气污染物比排放值的计算公式,并通过CO2窗口比排放值与功基窗口比排放值的换算,推导出CO2窗口法比排放限值。将设计的CO2窗口法应用于某大型液化天然气(LNG)公交车RDE车载测试评价,结果表明,该方法与功基窗口法评价结论有较好的一致性。A CO2-based window method to evaluate Real Drive Emission(RDE) of large bus is designed. A method to judge the effective window by the mean CO2 emission rate proportion of window is proposed, by using CO2 emission of European Transient Cycle(ETC) to determine the size of window, and by fitting engine effective power with linear relation of CO2 emission rate, thus the formula to calculate the specific emission value of CO2-based window exhaust pollutants is derived. Then the specific emission limit value of CO2-based window method is derived by converting the specific emission limit value of CO2-based window method and specific emission value of power-based window. The designed CO2-based window method is applied to RDE on-board test emission of a large LNG bus, which shows that this method is consistent with the power-based window method in evaluation conclusion.

关 键 词：液化天然气公交车 实际行驶排放 车载测试 CO2窗口法 

分 类 号：U467[机械工程—车辆工程]