Drivetrain System Design And Analysis For Hybrid Electric Commercial Vehicle

Energy-saving and environmental protection is the focus of the current development of automotive technology. Electric vehicles and hybrid electric vehicles become to the mainstream of the energy-saving and environmental protection vehicles. This paper presented my research on the drive train of the hybrid electric light commercial vehicle which relied on the national 863 project. The main contents of this paper are as follows:(1) The history, research status and categories of the hybrid vehicles were described in this paper. Based on a detailed analysis of the advantages and disadvantages of different hybrid power systems, this paper explained the background of this research project.(2) By studying on the market needs, advantages and disadvantages of different drive-train structures and existing technology accumulation in the company which undertaken the project, the power-train system for the 863 project was designed in this paper. The key components were analysised and designed to match the vehicle design target.(3) The characteristic of coupling device and its electro-hydraulic control unit were discussed in the article. The simulation models of the two compents were established and simulated. Through the analysis and simulation was provided the academic base for the research of the forward vehicle model and the design of vehicle control unit.(4) On the basis of sufficiently research on theoretical and experimental data, models of the key components and driver model were advanced in this paper. The three parameter shift schedule of AMT, which is based on speed, throttle and SOC, was introduced. The control strategy was designed, and the vehicle's forward model was built in Matlab/Simulink to access the performance of control strategy. The test results show that the performance of designed control system meets the design requirements, and the vehicle has a substantial increase in economic performance.(5) According to the plans of the project, the test-bed of the coupling device was designed and the tests of static characteristics and dynamic characteristics of the coupling device were carried out. The test results indicated that the established model in this paper is reasonable and it can be used in the model of hybrid electric vehicle.