Study on the Optimization of Shifting Strategy for Hybrid Electric Vehicle

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Zhenyuan Zhong ◽  
Xuewu Liu ◽  
Lei Yang ◽  
Chen Zhang ◽  
Yuan Li
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Shifting Strategy ◽  
Hybrid Electric

Optimal Gear Ratio and Gear Shift Strategy Design for a Parallel Hybrid Electric Vehicle Equipped With AMT

2010 ◽  
Author(s):  
Morteza Montazeri-Gh ◽  
Zeinab Pourbafarani ◽  
Hassan Nehzati
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Fitness Function ◽  
Gear Ratio ◽  
Optimization Constraints ◽  
Parallel Hybrid Electric Vehicle ◽  
Shifting Strategy ◽  
Parallel Hybrid ◽  
Hybrid Electric ◽  
Optimal Approach

This paper presents an optimal approach for the design of gear ratios and gear shifting strategy for parallel hybrid electric vehicle (HEV) equipped with automated manual transmission (AMT). For this purpose, an AMT model is firstly provided and integrated with a pre-transmission parallel HEV model to develop a comprehensive simulation tool for vehicle powertrain performance evaluation. Using genetic algorithm (GA), an optimization problem is then formulated for the optimal design of the AMT variables including its gear ratios as well as the variables defined for the gear shifting strategy. A weighted aggregation of the HEV fuel consumption and emissions is also employed as the fitness function. In addition, the vehicle driving performance characteristics are considered as the optimization constraints. To optimize the gearshift strategy and gear ratios, GA optimization process is performed for several traffic conditions. The results show that the approach is quite effective. A considerable improvement is achieved at congested condition due to its sensitivity to the stop-start operation of the vehicle.

Design and Control Strategy of a 4WD Hybrid Electric Vehicle with a Two-Speed Transmission

2013 ◽  
Vol 380-384 ◽  
pp. 605-608
Author(s):  
Ze Yu Chen ◽  
Xue Jiao Li ◽  
Bin Jiao
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Power Distribution ◽  
Hybrid Electric Vehicle ◽  
System Structure ◽  
Parallel Hybrid Electric Vehicle ◽  
Shifting Strategy ◽  
Parallel Hybrid ◽  
Hybrid Electric ◽  
And Control

A new-style four-wheeled driving (4WD) series-parallel hybrid electric vehicle (HEV) plus with a two speed transmission is presented in this paper. The system structure and operation principles are discussed systematically, and then the control strategy is proposed. Control strategy focus on the multi modes switch logic and power distribution. In addition, shifting strategy of the two speed transmission is researched. Simulation results indicate that the presented 4WD HEV can realize nice dynamic property; the presented control strategy is correct and effective.

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