Characters Of Diesel Vehicle Fine Particulate Matter (PM_2.5) Emission And Applied Research Of MOVES Model

With the increasing number of vehicles,the problem of environmental pollution caused by motor vehicles is more and more obvious.In recent years,the cause of the smog problem in most of the Northern provinces has a direct relationship with the largely emission of PM_2.5 from diesel engine.Diesel vehicle is the main contribution to the source of PM_2.5,so the research on PM_2.5 emission of diesel vehicle,PM_2.5 emission factors of diesel and diesel vehicle emissions of the PM_2.5,is very important for the control of vehicle exhaust pollution.In this study,diesel engine in a large city in East China works as the research object,selecting 23 diesel vehicles,including light trucks?8 vehicles?,medium truck and heavy truck?3 vehicles?,4 vehicles,8 buses,vehicle type selection covers the vast majority of the diesel vehicle emissions market.Test equipment?Portable emission measurement system,PEMS?were selected to test the vehicle emission vehicles and the PM_2.5 emission factor calculated by the experimental vehicle,a PM_2.5 diesel vehicle emission inventory.The results show that the emission standard for light truck PM_2.5 average emission factor is 0.0266g/km and the National ? emission standards for light truck PM_2.5 average emission factor is 0.0049g/km;the emission standard for medium truck PM_2.5 average emission factor is 0.2362g/km,the National ? emis,sion standard for medium truck PM_2.5 average emission factor is 0.0812g/km;the national ?emission standard more renewal The emission factor of PM_2.5 heavy duty truck motive for 0.1381g/km,the emission factor of PM_2.5 heavy truck without replacing the engine for 0.2947g/km,National ? emission standards for heavy duty truck PM_2.5 average emission factor is 0.0392g/km;the national ? emission standard to replace the engine's PM_2.5 emission factor for 0.0185g/km bus,PM_2.5 bus emission standard without changing engine average the emission factor of 0.1141g/km;China IV standards for new energy buses PM_2.5 average emission factor is 0.0090g/km,the National ?emission label common bus PM_2.5 emission factor for 0.0135g/km.emission standards for diesel vehicles significantly reduced emissions of PM_2.5.Light truck,medium truck,heavy truck and bus in discharge standards after PM_2.5 emission factor decreased 54.8%-86.6%,63.5%-67.5%,86.1%-87.4%,88.4%-92.1%.of the diesel vehicles in PM_2.5 row The total discharge amount is 365.9 tons,of which the share rate of PM_2.5 of heavy truck is,and the share rate of medium truck is about 12.4%,the share rate of light truck emission is about 15.1%,and the share rate of bus is only 1.66%.The MOVES model is also used in the study of vehicle emission simulation experiment.By comparing the results of model and the actual test results showing that there is about 10%of the gap between the MOVES model of domestic vehicle emission simulation results and actual results,the change regularity of different types of diesel PM_2.5 emissions calculated is in agreement with the experimental results.