Research On Powertrain Matching And Operation Optimization Of Pure Electric Vehicle

Pure electric vehicles have unparalleled advantages in solving environmental pollution and energy shortage problems.It has become the main force of the new generation in the automotive industry.One of the key technical issues is the matching and operation optimization of electric vehicle powertrain,which has significant significance in improving the performance of the entire vehicle.The main research contents of this paper are as follows:(1)The characteristics and layout of key components of the powertrain are analyzed,and the mechanical model of the electric vehicle under different driving conditions is established.Combined with the performance index,the parameters such as drive motor,power battery set and total transmission ratio are matched reasonably;(2)Focusing on the problems of electric vehicle acceleration power and maximum driving range,the acceleration torque compensation,speed control,and maximum regenerative braking force distribution are optimized under normal driving acceleration,energy limitation,and braking return energy;(3)Completed the vehicle’s secondary development based on the ADVISOR vehicle simulation platform,and verified the above parameters matching and operation optimization strategy.The main technical features studied in this paper are:(1)Integrate the acceleration intention of the driver and the state of charge of the battery into the fuzzy algorithm to control the output torque of the drive motor in real time during the running of the electric vehicle;(2)By analyzing the relationship between the braking force received by the front and rear wheels when the vehicle is braking,the braking force on the front driving wheel is distributed according to the magnitude of the braking strength.After theoretical analysis and experimental tests,it is verified that the optimized parameters and control strategies improve the driving experience and driving safety to a certain extent,improve the vehicle acceleration and the maximum driving speed performance,and increase the maximum driving mileage.