Gear shifting control method for electrically-controlled mechanical automatic transmission of pure electric commercial vehicle

Abstract

The invention relates to a gear shifting control method for an electrically-controlled mechanical automatic transmission of a pure electric commercial vehicle. The method comprises the following steps: S1, acquiring gear shifting test data, and acquiring optimal reference rotating speeds of a clutch of the vehicle under different driving conditions through neural network regression training; S2, recognizing the driving condition of a driver through K-means clustering, and calling the optimal reference rotating speed of the clutch from a regression neural network trained in step S1 according to the recognition result of the driving condition; and S3, according to the difference value between the clutch rotating speed collected in real time and the clutch optimal rotating speed under the current driving working condition, performing compensation control on on the clutch target torque by an automatic gearbox control unit of the vehicle through an active-disturbance-rejection control algorithm, so that the difference value between the clutch actual rotating speed and the reference rotating speed is made to be zero, and therefore the optimal gear shifting state of the vehicle is achieved. The gear shifting control quality can be guaranteed, and accurate vehicle gear shifting control is achieved.

Description

technical field [0001] The invention relates to the technical field of automatic transmission control, in particular to an electronically controlled mechanical automatic transmission shift control method for pure electric commercial vehicles. Background technique [0002] Electromechanical automatic transmission (Automated Manual Transmission, AMT) has the characteristics of high mechanical efficiency and low cost, but AMT will inevitably experience power interruption when shifting gears, which will reduce the smoothness of shifting, while pure electric commercial The vehicle has a large inertia and is relatively less affected by power interruptions, so AMT has a good application prospect in the field of pure electric commercial vehicles. The gear shift control module is an important part of the AMT system. In the gear shift phase, in order to achieve the multi-objective optimization of the friction and impact, ensure the comfort of the gear shift and the service life of the...

AI Technical Summary

Problems solved by technology

In actual vehicle applications, AMT generally adopts the traditional rule-based shift control method, which relies on a large number of parameter calibration work, and fixed control parameters are difficult to adapt to the internal and external disturbances of the system, and vehicles equipped with AMT are prone to shifting problems. issues such as gear judder and clutch ablation

With the promotion of the AMT powertrain system in the field of commercial vehicles, the requirements of customers and the market are getting higher and higher. The traditional shift control method restricts the further improvement of the shift performance of the AMT powertrain. Therefore, it is necessary to load The pure electric commercial vehicle is the research object, and the shift comfort of AMT is taken as the control target, and the influence of the internal and external interference of the shift system is considered to further improve the shift quality of the pure electric commercial vehicle

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