An optimized integrated system and shift control method of a driving motor and an automatic transmission

Abstract

The invention provides an optimized integrated system with a drive motor and an automatic transmission and a gear shifting control method. The optimized integrated system comprises the drive motor, an input shaft, a torsional damper, the automatic transmission, a transmission shaft, a main speed reducer and an integrated control unit. An output shaft of the drive motor is connected with one end of the torsional damper through a spline, and the other end of the torsional damper is connected with an input shaft of the automatic transmission through a spline. An output shaft of the automatic transmission is connected with one end of the transmission shaft through a universal joint, and the other end of the transmission shaft is connected with the main speed reducer through a universal joint. The drive motor is directly connected with the automatic transmission through the torsional damper, damage of impact generated in the gear shifting process to the shaft of the drive motor is reduced, and meanwhile, the gear shifting failure rate caused by gear shifting impact is reduced. According to the optimized integrated system, the gear shifting time is shortened, the phenomena of power impact and unsmooth gear shifting are eliminated, equipment abrasion is lowered, and the dynamic performance, the economic performance and the smoothness of an electric automobile are improved.

Description

technical field [0001] The invention belongs to the field of automobile power transmission research, and in particular relates to an optimized integrated system of a drive motor and an automatic transmission and a shift control method. Background technique [0002] At present, most domestic electric vehicle transmission systems adopt the direct drive mode of drive motors, and many pure electric buses on the market use direct drive motors with high power and high torque. Although the use of this driving method reduces the difficulty of matching the power system design, it greatly increases the investment in the drive motor. The drive motor used in this situation has the disadvantages of large size, heavy weight, low utilization efficiency, and the drive controller. Various disadvantages such as low utilization rate of effective capacity and waste of energy have seriously affected the popularization and application of electric vehicles. In addition, the analysis and applicati...

AI Technical Summary

Problems solved by technology

[0007] At present, there is a huge demand for PMSM+AMT integrated motor drive system at home and abroad, but due to the lack of key technologies with independent intellectual property rights, the PMSM+AMT integrated control technology with high efficiency and high dynamic response has become a bottleneck in the development of electric vehicles

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