~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~试验研究柴油机设计与制造DesignandManufactureofDieselEngine2023年第2期第29卷(总第183期)驾驶行为对轻型车实际行驶污染物排放特性的影响李树宇(奇瑞汽车股份有限公司,安徽芜湖241007)摘要:为研究在不同驾驶行为下某轻型车的实际行驶污染物排放(RDE)特性,采用便携式车载排放分析设备,分别在激烈驾驶行为、正常驾驶行为、柔和驾驶行为3种条件下对某电控增压进气道喷射(PFI)发动机进行了RDE试验研究(试验时未对发动机进行任何改动)。结果表明:激烈驾驶行为在市区工况影响最大;CO和氮氧化物(NOx)排放结果与加速行为呈现正相关,即激烈驾驶行为排放>正常驾驶行为排放>柔和驾驶行为排放,其中CO的总体符合性因子在激烈驾驶行为下超过符合性因子限值(2.1),而NOx的符合性因子在激烈驾驶行为下市郊工况明显增加,且在限值以内;激烈驾驶行为下所排放的颗粒数(PN)远高于柔和驾驶行为,且郊区工况颗粒物(PM)排放最多,高速次之,整体排放结果远超过符合性因子限值(2.1)。国六车型开发时应重点优化整车的CO和PM排放。关键词:轻型车;排放特性;驾驶行为;实际行驶污染物排放(RDE)InfluenceofdrivingbehavioronrealdriveemissioncharacteristicsoflightvehiclesLIShuyu(CheryAutomobileCo.,Ltd.,Wuhu241007,Anhui,China)Abstract:Inordertostudytherealdriveemission(RDE)characteristicsofalightvehicleunderdifferentdrivingbehaviors,aportableemissionmeasurementsystemwasusedtocarryoutRDEtestre⁃searchonanelectronicallycontrolledportfuelinjection(PFI)engineunderintensedrivingbehavior,nor⁃maldrivingbehaviorandsoftdrivingbehavior,withoutanychangestotheengineduringthetest.There⁃sultsshowthatthedrivingbehavioraffectspositiveacceleration,andtheurbandrivingconditionsunderintensedrivingbehaviorhavethegreatestimpact.COandNOxemissionresultsarepositivelycorrelatedwithaccelerationbehavior,theresultisintensedrivingbehavior>normalbehavior>softdrivingbehavior,inwhichtheoverallcompliancefactorofCOexceedscompliancefactorlimit(2.1)underintensedrivingbehavior,whilethecompliancefactorofNOxsignificantlyincreasesinsuburbandrivingconditionsunderintensedrivingbehavior,andiswithinthelimit.Theparticulatenumber(PN)und...