The Opening report

崔驿（车辆gi1403 0121428250307）

1.Purpose and Significance (including domestic and foreign research status analysis)

(1) Analysis of research status at home and abroad:

In 2001, Endo H introduced Toyota Motor Corporation's Toyota Hybrid System Continuously Variable Transmission (ths-c) developed for small trucks in "Development of Toyota's transaxle for mini-van hybrid vehicles." Lightweight and efficient. The unit achieves good driving comfort through continuously variable control and provides high power drive control through wet multi-disc clutches.

In 2009 Xie Jinli's dissertation "Virtual Prototype Simulation of Differential Planetary Power Synthesizer in PHEV and Vehicle Performance Analysis Based on ADVISOR" optimized and matched the power of hybrid electric vehicles based on the actual road conditions of the automobile. Parametric modeling and simulation studies were conducted on the key components of the transmission system, the Iridium wheel transmission, so that hybrid electric vehicles could achieve an optimized combination of low fuel consumption and low exhaust emissions. The optimized parameters can meet the expected performance indicators, at the same time, it can bring down the manufacturing cost of the whole vehicle, and the key parameters of the power system are also more reasonable, which is of practical significance to the design of the transmission system and power matching of the PHEV.

In 2010, “Study on Coupled Vibration of Electric Vehicle Drive Motors and Front Drive Axle”, Xue Yuchun conducted a study on the coupled vibration of the specific structure (the drive motor and the front drive axle monolithic structure) of typical electric vehicle steering systems and drive systems. A four-degree-of-freedom-shock model was established, and the influence of the gyro effect and the road's unevenness excitation on the drive motor was analyzed. The simulation of the vibration response of the actual vehicle model is given and the ideal numerical analysis results are obtained. It provides a reliable theoretical basis for the further development of electric vehicles.

In 2011, C.E.Ceri et al. invented a multi-stage transaxle for a front wheel drive vehicle. The present invention provides a front wheel drive transmission having an input member, an output member, four planetary gear sets, a plurality of coupling members, and a plurality of torque transmitting devices. Each planetary gear set includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting device includes a clutch and a brake provided in a transmission case.

In 2011, Bai Ruiping invented a transaxle for an electric vehicle. Compared with the existing technology, the utility model has reduced the efficiency of variable speed transmission in the intermediate transmission section, and has a compact structure, so that the drive axle has better road adaptability.

In 2011, Peter J introduced GM Voltec's hybrid system in The GM Voltec 4ET50 multi-mode electric transaxle. It uses General Motors' front-wheel drive dual-mode hybrid and a new one. The power drive motor, optimized generator and improved control element allow two EV drive modes and two ER drive modes.