Research Of Bus Driving Cycle Building Methods In Xi'an

Vehicle driving cycle is used to describe the driving characteristics of a certain type of vehicles in a particular traffic environment and can reflect the traffic characteristics of a particular area.The manifestation is the speed-time process,which is an important reference for vehicle development and design.At present,the traveling driving cycle used in our country are equivalent to the European ECE15 + EUDC cycle,which is different from the actual traffic situation in our country.Therefore,it is of great practical significance to construct driving cycle that match the actual driving cycle for a specific city,a specific area and a specific route so as to provide basic reference data for vehicle parameter matching and control strategy development.In this paper,several methods are compared.The main work of this article is as follows:First,using the site strength method to compare bus lines in Xi'an,a representative of the bus line was screened,and the processing and convergence of raw driving cycle data were judged.Second,using cluster analysis based on eigenvalues,cluster analysis based on distance between centers,V-A analysis of short-stroke division and V-A analysis of variable-step interception respectively.Third,Taking the typical roads in Xi'an as the research object,the methods of constructing the above four driving cycle were evaluated,and the selection of 10 characteristic parameters(average speed,average acceleration,acceleration ratio,etc.)as the standard.The paper analyze the constructing driving cycle?European ECE driving cycle and China's urban bus driving cycle's error and make comparative evaluation.Fourth,using ADVISOR simulation software,establish the vehicle model,motor model,battery model,transmission system,such as pure electric bus model.Based on this model,the simulation studies are conducted on the four types of driving cycle and the ECE driving cycle in Europe and the driving cycle of urban buses in China.