Pollutant emission and fuel economy of hybrid electric vehicles in plateau regions
To investigate whether hybrid electric vehicles can achieve energy savings and emissions reduction in plateau regions,real driving emissions(RDE)tests were conducted using a portable onboard emissions measure-ment system in two cities on extended-range electric vehicles(E-REV),plug-in hybrid electric vehicles(PHEV),and gasoline vehicles compliant with China Ⅵ emission standards.The study analyzed the actual emission charac-teristics and fuel economy of hybrid electric vehicles in plateau regions.The results indicate that lower coolant tem-peratures and higher values of the product of speed and acceleration(v·a)result in higher instantaneous emissions of carbon monoxide(CO)and nitrogen oxides(NOx).After excluding cold start emissions,the reduction propor-tions of CO and NOx emissions during the cold start phase are greater than those of carbon dioxide(CO2)emis-sions.The pollutant emissions of hybrid electric vehicles are less affected by plateau environments.As the altitude increases,CO emissions rise for PHEVs and gasoline vehicles,while CO emissions decrease for E-REV.The CO2 emissions for E-REVs,PHEVs,and gasoline vehicles increase,and NOx emissions decrease.Compared to gaso-line vehicles,the NOx reduction of E-REV and PHEV in plateau regions is mainly observed in suburban and high-way conditions.The fuel consumption(FC)of E-REV increases with altitude,and PHEVs demonstrate better fuel economy compared to E-REV.
hybrid electric vehiclereal driving emissionsfuel economyemission
万方数据
维普
