The Study Of Xi’an Motor Vehicle Exhaust Emission Quantitative Simulation

With the increasingly serious motor vehicle pollution, quantitative motor vehicle emission is important. Under the existing conditions,from the perspective of motor vehicles,the way to reduce pollutant emissions has two methods:using the development of regulations, standards and other regulatory emissions or improve the performance of the vehicle itself. However,with the enhancement and improvement of development,efficiency of the two methods is getting low. Therefore,it is need to study how to reduce vehicle emissions from a traffic point of view,so the introduction of vehicle exhaust quantitative model is used to study this issue.On the basis of a review of vehicle exhaust on quantitative models,the paper chooses to use EPA(the United States Environment Protect Agency) newly developed quantitative models MOVES(Motor Vehicle Emission Simulator) to study vehicle exhaust. After analyzed the use and the parameters of the model,set some simulation scenarios on the control variables method, in turn to do sensitivity analysis ofthe affecting the county-level model parameters on vehicle emissions.Then,enter the sensitivity factors to simulate and evaluate passenger car and light truck emission factors of CO、NOx and THC. By combining different standard models of Beijing’s emission factors,emission factors for the simulation results were evaluated.Finally, after summarize the paper,this paper assume that combining with the traffic simulation model and vehicle emission model can provides a new idea for the future traffic pollution evaluation.Major theoretical and practical significances of this study are:1. Clarified the relationship ofthe data exchange between the major MOVES modules, provided a base for the future development of China’s own quantitative model of vehicle exhaust.2. Analyzed sensitivity factors of county-level MOVESmodel,provideda basis for Xi’an vehicle emissions factor analog, and a possible energy saving way by studying the factors affecting the operation of the emissions.3. Provided references for the development of new exhaust emission control strategy, through using MOVES to simulate, evaluate and analyze Xi’an peak emission.4. Provided a new method for the transportation of Environmental Impact Assessment though the proposed combination of County-level MOVES model and micro-level traffic simulation model.