A self-learning method and system for current valve pressure difference-current characteristics

Abstract

The present invention provides a self-learning method and system for the pressure difference-current characteristic of a current valve. The self-learning method is applied to the self-learning system, including: obtaining multiple self-learning current points of the pressure difference-current characteristic; Under the set working conditions, apply respective learning current points to the current valves; after a preset time, obtain the motor bus currents corresponding to the respective learning current points; calculate the corresponding first pressure difference according to the motor bus currents ; Obtain the second pressure difference corresponding to the respective learning current points according to the stored pressure difference-current characteristics; calculate the difference between the first pressure difference and the second pressure difference, and according to the difference , to adjust the stored pressure difference-current characteristics. The invention adjusts the pressure difference-current characteristics of the current valve through a self-learning method, thereby reducing the manufacturing process cost of the current valve while improving the braking accuracy of the electronic stability control system.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a self-learning method and system for current valve pressure difference-current characteristics. Background technique [0002] The electronic stability control system is a new type of active safety system for vehicles. It is a further expansion of the functions of the anti-lock braking system and traction control system of the vehicle. On this basis, the yaw rate sensor and lateral acceleration sensor are added when the vehicle is turning. And the steering wheel angle sensor, through the ECU to control the driving force and braking force of the front, rear, left and right wheels to ensure the stability of the vehicle. [0003] For electronic stability control systems, braking accuracy is a very important indicator. At present, the accuracy of the relationship between pressure difference and current is ensured mainly by improving the manufacturing process accuracy ...

AI Technical Summary

Problems solved by technology

[0003] For electronic stability control systems, braking accuracy is a very important indicator. At present, the accuracy of the relationship between pressure difference and current is ensured mainly by improving the manufacturing process accuracy of the current valve. Generally, the manufacturing process accuracy of the current valve is required to reach 10%, the manufacturing process cost is very high; in addition, because the production and calibration of the current valves cannot be completely the same, there will be some differences in the pressure difference-current characteristic curves of each current valve, resulting in the braking accuracy of the electronic stability control system cannot meet the actual Require

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