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Pure electric two-gear AMT gear shifting control method based on synchronous track optimization

A technology of trajectory optimization and control method, applied in the direction of transmission control, transmission, components with teeth, etc., can solve the problem of inability to shift control and transplantation, and achieve the effect of smooth shifting and good shifting quality.

Inactive Publication Date: 2018-03-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the shift control strategy of traditional fuel vehicles has become mature and perfect, and it is mainly the coordinated control of the engine and the clutch. However, the clutchless pure electric vehicle cancels the clutch, and the power source is the drive motor, so it cannot Simply transplant the traditional car shift control to the pure electric car shift process

Method used

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  • Pure electric two-gear AMT gear shifting control method based on synchronous track optimization
  • Pure electric two-gear AMT gear shifting control method based on synchronous track optimization
  • Pure electric two-gear AMT gear shifting control method based on synchronous track optimization

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Embodiment

[0019] In this embodiment, taking the first gear up to the second gear as an example, the control strategies of the driving motor, the gear shifting motor, and the shifting process of the gear shifting process are described in detail.

[0020] For the driving motor, its working mode is divided into three types: torque mode, free mode and speed regulation mode. During the shifting process, the drive motor is in the torque mode during the zero clearing phase and the torque recovery phase, in the speed regulation mode during the speed regulation stage, and in the free mode during the rest of the stages.

[0021] With the gear shifting impact as the limit, determine the torque change rate of the driving motor during the process of clearing the torque of the driving motor and the process of restoring the torque of the driving motor; For the purpose of quickly adjusting to a smaller range, determine the target speed of the drive motor speed regulation.

[0022] For the shift motor,...

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PUM

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Abstract

The invention provides a pure electric two-gear AMT gear shifting control method based on synchronous track optimization. A gear shifting motor and drive motor parallel coordinated control strategy isprovided, the synchronizer work process is decomposed in details, and the optimal synchronous track is determined through the PI control method and the optimal control method based on the minimum principle; and the good gear shifting quality is guaranteed, and the gear shifting smoothness and rapidness are improved.

Description

technical field [0001] The invention relates to the field of electric vehicles. Background technique [0002] At present, due to people's increasing emphasis on environmental protection and effective and rational use of energy, pure electric vehicles with high-efficiency, energy-saving, and environmentally friendly models have become the development trend of the automotive industry. [0003] The main performance of pure electric vehicles includes two parts: economy and power. In order to improve vehicle economy, power and shift comfort, it is necessary to design a two-speed AMT shift control strategy for pure electric vehicles. At present, the shift control strategy of traditional fuel vehicles has become mature and perfect, and it is mainly the coordinated control of the engine and the clutch. However, the clutchless pure electric vehicle cancels the clutch, and the power source is the drive motor, so it cannot Simply transplant the traditional car shift control to the pur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/08F16H61/02F16H59/36F16H61/26F16H63/30F16H3/06
CPCF16H3/06F16H59/08F16H59/36F16H61/0213F16H61/26F16H63/30F16H2059/082
Inventor 刘永刚曾浩宇秦大同罗先兵
Owner CHONGQING UNIV
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