| Hybrid electric vehicle is one of the automotive industry development directions. Hybrid electromechanical coupling is an important component for hybrid electric vehicles. In order to meet the needs of the market, develop the coupling with hybrid electric motor and AMT system for passenger cars, and study its characteristic. I passed a lot of reading on the hybrid electric vehicle in papers, books, journals, knowledge of foreign hybrid electric vehicle development history and domestic research and development status. I read these articles based on the collection, collation classification with the development of hybrid electric vehicle related information. This paper introduces the function of the HEV electromechanical coupling system, domestic and international status and development trend. Foreign automobile manufacturers which started early, has been mass-produced car on the market. Such as Toyota, Honda. As of May 2008, Prius hybrid sedan in Japan and abroad have been breaking the cumulative sales of 1.5 million mark. The domestic automobile manufacturers of hybrid vehicles to be late. And in financial and manpower investment and foreign automobile companies do not. There is no mass-market to mature automotive products. Domestic auto manufacturers of hybrid electric vehicle research, largely due to the promotion of the Olympic Games. During the Olympics, the domestic automobile manufacturers a variety of hybrid vehicles were on operational trial. As the size of large passenger cars, with space superiority, application of mixing in the bus than in passenger cars on the power system is easy to realize, therefore, domestic passenger car types in this area more. The passenger cars by the body of space constraints, part sizes should be small, so very few varieties of hybrid passenger cars, and the hybrid mix of degree are low, fuel-saving effect is not obvious. Improve the degree of hybrid hybrid passenger cars are an important way to improve fuel efficiency. For passenger cars, electromechanical coupling power transmission device with compact structure, high efficiency, easily controlled and low-cost is the most important. Development of electromechanical coupling gear based on the needs of the coupled transmission characteristics of the various components were studied. Motor characteristics on HEV are introduced here, and we give qualitative analysis on the relation between the two characteristics of speed ratio and power, and the DC motor,AC induction motors,switched reluctance motors,permanent magnet synchronous motor characteristics are analyzed and compared. By comparison, the article is given to choose the direction of the motor coupling. Small size, light weight, high efficiency, low price, technical maturity of choosing the type of coupling motor aspects to be considered. The same time, electronically controlled automatic mechanical transmission types were introduced, and electronically controlled pneumatic mechanical automatic transmission, electronically controlled hydraulic mechanical automatic transmission and electronically controlled automatic transmission electrical mechanical advantages and disadvantages of the controller to analyzed. Make a decision to adopt mount electrical mechanical electronic control automatic transmission. The Electronic controlled and Electronic powered AMT system not only has the function and the characteristic which the automatic transmission requests, moreover retained the manual transmission's characteristic, such as high efficiency, low cost and easiness to manufacture, so it has a widespread prospect and superiority in the market of China. AMT control strategies include the formulation of the law and the clutch shift the formulation of the law. By comparing the various control methods, they identified control methods. On the base of analyzing the characteristics of the components, designed the structure. Through the analysis of structure and the related calculations, finished the design details of the coupler with hybrid electric motor and AMT system . This article contains parts of the calculation and analysis, gear, shaft, bearing fatigue strength calculation, axis deformation analysis, sprocket, chain fatigue strength calculation, transmission gearbox housing of the Calculation of the shell that contains the safety factor, stress, deformation the motor cooling water jacket of the CFD flow analysis, application Nastran software for AMT-shift in the motor thermodynamic analysis. The system has a high level of integration, simple structure and low machining costs. The test tried out the coupler achieves requirements for matching the vehicle and using it to develop the control system for the vehicle. At present, based on this motor and AMT-coupled actuators, produced a trial batch BESTURN hybrid cars - B70HEV, has been completed demonstration runs of the Beijing Olympic Games. The demonstration runs achieved good running fuel efficiency.
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