Steering gear autonomous zero calibration control system and method

By designing the steering gear autonomous zero calibration control system, the coordinated work of multiple modules is used to adjust the zero angle of the steering wheel in real time, the problem of "zero drift" caused by changes in vehicle quality and tire pressure in the prior art is solved, and a higher reliability and accuracy of the steering system is achieved.

CN119872690AActive Publication Date: 2025-04-25SHAANXI FAST AUTO DRIVE GRP CO LTD
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Patent Information

Application Number
CN202411936022.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-04-25
Estimated Expiration
2044-12-26

AI Technical Summary

Technical Problem

The existing automobile steering system cannot achieve autonomous zero calibration when the vehicle quality and tire pressure change, resulting in a "zero drift" phenomenon in the steering wheel, affecting the reliability and accuracy of the steering system.

Method used

A steering wheel autonomous zero-position calibration control system is designed. Through the coordinated work of modules such as data acquisition module, vehicle quality calculation module, steering wheel angle calculation module, tire pressure calculation module, linear driving judgment module and zero-angle control module, the zero-angle angle of the steering wheel is calculated and adjusted in real time to ensure that the steering wheel remains in the zero position when driving in a straight line.

Benefits of technology

It realizes autonomous zero calibration of the vehicle when the vehicle quality and tire pressure changes, avoids the problem of steering wheel deviation, saves drivers' maintenance costs, and improves the performance and reliability of steering products.

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Abstract

The invention provides a steering gear autonomous zero calibration control system and a steering gear autonomous zero calibration control method. The steering gear autonomous zero calibration control system comprises a data acquisition module used for acquiring required bus message information; the vehicle mass calculation module is used for calculating the vehicle mass; the steering wheel angle calculation module is used for calculating a corresponding steering wheel sensor angle value; the tire pressure calculation module is used for receiving the tire pressure measured by the tire pressure sensor; the straight-line driving judgment module is used for judging whether the vehicle is in a straight-line driving state or not according to the wheel rotation angle obtained by the wheel rotation angle sensor in the steering controller; the zero angle control module is used for vehicle zero angle control calibration; and the data storage module is used for storing the data in the corresponding NVRAM after the vehicle learns new zero angle data. The problem that a steering wheel is not correct due to the fact that the electric power steering zero angle of the vehicle deviates from the zero position due to changes of the mass and the tire pressure of the vehicle is solved.
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