The Development Of Electric-drive Mechanical Transmission

The development of the internal-combustion engine car is one of the most important achievements for the modern industrial technology. However, the applications of the highly developed automobile industry and a lot of car have led to serious environmental and hydrocarbon resources problems. The quality of atmospheric degradation, global warming and the lack of oil resources become the threat of modern life. Ever more stringent emission regulations and fuel efficiency standards promote the safety, clean and efficient rapid development of vehicle. Today, electric vehicles, hybrids electric vehicles, all kinds of drive system technology supplied by fuel cells are known to be the most effective solution in the foreseeable future.Hybrids Electric vehicle has the advantages of long driving distance, amazing power system and lower pollution and noise. The power coupling system is the key to the hybrid system, there is few breakthroughs have been achieved. The electric-drive mechanical transmission solves the intractable problem of power coupling applied on the parallel hybrid system in virtue of the motor&transmission integrated technology and the rapid and accurate motor speed adjustment characteristic.EMT is HEV automatic transmission system, dealing with the integration between motor and transmission. The integration method not only reduce the power system length, and turn transmission shifting synchronous process from passive friction synchronous to active friction synchronization, making shift process more smoothly more quickly. In addition, the measures improve the efficiency of the vehicle, shorten the development cycle and improve the market competitiveness of hybrid vehicles.The thesis first tells the structure of Electric-drive mechanical transmission and the design of the key parts. Secondly, research the control strategy based on the hybrid system. And then, design the control system and test bench. The result of test bench experiment and loading experiment show that the system satisfies the design requirements.The experimental results show that EMT research results can resolve AMT shifting interrupt obviously and shifting power interrupt time problem.