The Research Of Vehicle's Emissions On Urban Main Road Based On VSP

The increase of the auto consumption led to the deteriorating of urban environment. Some large and medium-sized cities in China the auto take the more than half of the total amount pollution. In recent years, the important feature of air pollution tend is vehicle emissions exhaust pollution take much place from smoke pollution. Reduce air pollution; vehicle emission control situation has become an urgent task. As a link between the city's major regional trunk roads,It is also a major commitment of vehicle exhaust pollution source line carrier. Especially in some large cities in its existing main road transport is not functioning fully, uneven distribution of traffic. Makes frequent jams in urban areas, motor vehicle operating in bad conditions. Motors work in the worst operating conditions, such as idling,poor working conditions. Need such a rich combustion state vehicle to meet the operating conditions change,the better dynamic performance. This is bound to cause further increased vehicle emissions.Take the above factors into consider of main road vehicle emission characteristics. under consideration targets "saving energy and reducing emission "Exploring the relationship between Main Road traffic flow with the pollutants that will made the benefit of develop urban transport planning, improving the theory infrastructure construction and lay the foundation for traffic management and transport. It has real value.Traffic related environmental quality evaluationIn analyzing the impact of actual vehicle conditions in trunk road , established experimental program emissions factors. Focuses on the particular vehicle's operations mode under actual conditions. Using the on board Vehicle emission test equipment OEM2100 which produced by Clean Air Technologies Inc in United States to use the gas analyzed emission and GPS equipment and other facilities test platform,obtain the emissions data and run status data. By anglicizing operate conditions and emissions data in, and the establishment the model of a micro-state movement of vehicles between emissions.This paper based on VSP model established the instantaneous emission rates mode. From the perspective of physics, Analysis mathematical model of the engine load conditions based on vehicle specific power analytical methods of the emission rates. According measured the frequency VSP and vehicle's speed on road divisional vehicle operation in District 17 bins; further establish the the various micro-cycling operation of the VSP and vehicle emission rates modelAnalysis main road traffic flow character, establish the model of calculation emissions method of trunk sections. Analysis test data available for variously period's road condition, vehicles operation and VSP distribution sections of the main roads in order to determine the emission rates. Further more using theories based on the emission rate of traffic engineering. The calculation of emission inventory methods by real-time traffic flow and density characteristics of traffic flow of the Describes the analysis of the main road traffic flows based on the emission components division and conversion coefficient method.The most serious pollutants point of Trunk Road is the intersection. This paper has taken a special study on it. Analysis the situation in specific areas. road and the ability to identify certain traffic signal control measures under the operating rules, According to the vehicle so that the establishment of emission model , model-specific conditions under braking deceleration, Idle,speed up the process of analyzing the intersection of the exhaust emission pollution.. After the establishment of a traffic intersection on condition of the premises through a typical f emissions intersection of numerical simulation methods. The method carried out in Jiefang crossing a key intersection in Changchun as the example. The results of paper provide a theoretical basis for the evaluation of urban trunk road traffic environment research; will have a positive impact on China's traffic environmental problems.