Method for operating steer-by-wire system

By determining the driver's manual torque based on the steering angle and driving speed in the online steering system, the problem of unnatural steering feel in existing technologies is solved, and the adjustment is simplified and the naturalness of steering feedback is improved.

CN120916935APending Publication Date: 2025-11-07ROBERT BOSCH GMBH
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Patent Information

Application Number
CN202480017507.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-03-09
Filing Date
2024-01-25
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

In online steering systems, existing technologies struggle to accurately determine the driver's manual torque, resulting in an unnatural steering feel, and the side effects of active return and rack force are significant.

Method used

By determining the driver's manual torque based on steering angle and driving speed, ignoring the dynamic effect of rack force, and using the driving conditions to pre-determine the static and dynamic driver's manual torque, combined with center sensing function and active return function, the steering feedback is optimized.

Benefits of technology

It simplifies the adjustment of the steering system, avoids the side effects of rack and pinion forces, improves the naturalness and accuracy of steering feel, and reduces the cross-influence of the system.

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Abstract

The invention relates to a method for operating a steer-by-wire system (1) in a vehicle, in which the steering system (1) can be controlled by means of a steering handle (2), a driver manual torque, which comprises a static driver manual torque and can comprise a dynamic driver manual torque, is applied to the steering handle (2), the driver manual torque is determined as a function of the driving situation of the vehicle, and the steering system (1) is controlled by means of the steering handle (2). And calculating a static driver manual torque based on the steering angle and the driving speed irrespective of the dynamic effect of the rack force.
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