A Research On Torque Distribution Strategy Of Parallel Hybrid Electric Vehicle Based On Advisor2002

Energy depletion and environmental pollution are two major challenges to the globalautomotive industry. So the research and production of energy conservation andenvironment protection transports are closely related to the country’s sustainabledevelopment issues. Hybrid electric vehicle is a new product which is combinedtraditional vehicle and electric vehicle. The hybrid electric vehicle takes the advantages ofthe low emission of electric vehicles while has the high power performance of the normalengine. With the unique properties, the hybrid electric vehicle is seen as the first choice tosaving the problems about energy resource and environment. It is equipped with twopower sources, the traditional internal combustion engine and motor. Therefore, HEVvehicle control technology is more complex than conventional vehicle, especially thecontrol problems about the reasonable distribution of the two power source output torque,the hybrid vehicle drive system how to use the output torque to improve the overallefficiency. In this paper, the parallel type HEV hybrid electric vehicles is taken asexperimental subject, the issue of torque distribution strategy has been studied.Firstly, this paper showed the development history of hybrid cars and itsachievements, from which we can see that hybrid electric vehicles suffered the degree ofattention. And the current common modeling methods in hybrid electric vehicles andsimulation software are described, which prepare the way for the subsequent researchpaper.Secondly, the basic structures and characters of three kinds of hybrid electric vehicles,which are series, parallel, and hybrid-type, are described. In this paper parallel is taken asthe research object, the mathematical simulation models of vehicle body, wheels,transmission, engine, motor and battery and other major components are built.Thirdly, ADVISOR2002simulation software is used for secondary development. Thetorque distribution controller is embedded in vehicle model. The electric auxiliary controlstrategy and fuzzy logic control strategy are used for system simulation. The paperconsidered with fuel economy, battery charge status, vehicle power and efficiency aspects of the vehicle, to comparing the pros and cons of control strategy.Finally, particle swarm optimization algorithm is used to optimize the membershipfunctions and control rules for the shortage of the fuzzy control strategy. The simulationresults showed that fuzzy control strategy is superior to electric auxiliary control strategy,and fuzzy control strategy could obtain a better efficiency than before after optimizationalgorithm optimized.