Article

Hybrid drivetrain and its application in off-road vehicle

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Abstract

The configuration and characteristics of the hybrid drivetrain and its applications were studied. The method of selecting the hybrid drivetrain was also presented. The configuration of the parallel hybrid drivetrain with combination of traction forces has been selected as the drivetrain scheme of the CFA6470HEV hybrid electric off-road vehicle. The parameters that matched the CFA6470HEV hybrid drivetrain have also been studied, and the proper parameters of the motor and battery set have been achieved.

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Article
In order to optimize the energy assembly control system of CFA6470 hybrid electric vehicle (HEV) using the mild hybrid control strategy was studied. The energy controller was designed and was divided into five modules, and optimal methods of the throttle angle and vehicle shift as well as the energy assignment strategy were studied too. The method deciding the state of charge of the battery pack was presented with the energy conservation principle. According to ECE-EUDC cycles, simulations were done for the system with two different anticipant vehicle speeds. The results indicate that in the CFA6470 HEV, when the engine operates with the demanded cycles, the energy can be assigned as the scheduled goal among engine, motor and battery pack according to the mild hybrid control strategy and the state of charge of battery pack is same changed with the vehicle running state.
Article
The energy regenerative braking system (ERBS) of the CFA6470 parallel hybrid electric vehicle (CFA6470PHEV) has been designed using the T-S fuzzy model and fuzzy control toolbox in the MATLAB. The inputs and outputs of the system, along with their membership functions, are reported. The T-S fuzzy model is established for the system and the fuzzy inference system (FIS) is also established. The simulation results indicate that, in the course of driving, the braking torque provided by the electrical motor is controlled in the region that the electrical motor permits, the mechanical braking torque can reach a high value, and the results are consistent with the model.
Article
The hybrid ratio of a parallel hybrid electric vehicle (PHEV) and its energy management strategy are analysed. On the basis of the drivetrain configuration of the CFA6470 parallel hybrid electric vehicle (CFA6470PHEV), the energy management system of the CFA6470PHEV is designed. The optimisation of the engine throttle angle and vehicle shift, along with the mild hybrid and full hybrid strategy are also studied. An energy balance method is introduced to estimate the state of charge for the battery pack. The energy management system is simulated with the experimental data of the engine and ECE-EUDC cycles. Simulation results indicate that the energy management system is feasible and achieve the anticipated goal.
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