Real-Time Test System And Experimental Study Of Particulate Matter Emissions From Vehicle

With the haze impacts worldwide,people are increasingly concerned about the values of PM(Particulate Matter),especially in recent years,many experts point out that PM2.5 can induce bronchitis,cardiovascular and other aspects of diseases.Those experts point to the vehicle emissions which travel in the urban road,such a voice that has been attached great importance to industry experts,after extensive research,the result show that there is indeed a great impact for environmental pollution.It also show that,the city by automobile exhaust testing will be highly valued in the future.But at this stage,vehicle exhaust testing method is gradually to the real-time measurement,portable,inexpensive,accurate measurement and other direction,at this time,who use the light scattering particle to measure the vehicle emission will reflect its unique advantage.This paper selects MAHA MET6.3 which named PM analyzer to measure the particle concentration and distribution of pollutants,mainly for the following studies:(1)By Mie scattering theory basic formula,and other computationally intensive function approximation and Mie scattering,in order to study the feasibility of measuring in vehicle emissions of particulate matter detection applications.(2)Be built on vehicle emissions testing system in typical urban roads,increasing the feature of particulate matter emissions testing,and set up a comprehensive inspection system at the core of particulate matter emissions testing,from gasoline and diesel vehicles tested two aspects,planning the technical route,and drawn up technology roadmap,focuses on the inductive method of the test system emission factors,and this paper apply VB program to developed a particulate matter test platform.(3)Using MAHA MET6.3 particulate matter analyzers and five-gas analyzer to test the particulate matter concentration in parallel.Selecting typical test models,and finish the experiment including idling condition,Vmas for gasoline and free acceleraton method for diesel,according to integration and analysis to the process data,and draw up the exhaust emissions depend on vehicles under each condition method.In the end,analyzing and forecasting the results of experiment characteristics of different types of vehicles.The result show that basically consistent with the actual experimental data.