Revision of IVE model using on-board emission measurements for diesel vehicles and application of revised IVE model

IVE model is one of the widely used international vehicle emission models.In order to make it more adaptive to vehicles in local area such as China,basic emission factors in IVE model are revised in this study.Firstly,basic emission factors of diesel vehicles in IVE model are compared with on-board emission measurements of 13 typical diesel vehicles,and revised coefficients are acquired.Then,revised IVE model is used to calculate vehicle emission factors in Ningbo.Results show that basic emission factors of CO in IVE model are mostly close to on-board emission measurements,following NOx and HC.Start-up emission factors of CO from vehicles in Ningbo are much higher than other pollutants,which are about 20 times HC and NOX.Running emission factors of bus are the highest,following heavy-duty truck,passenger car,and light-duty truck.