Middle-position calibrating method for electric power-assisted steering tube column

Abstract

The invention discloses a middle-position calibrating method for an electric power-assisted steering tube column. The middle-position calibrating method comprises the following steps: S1, detecting whether the whole vehicle state, including tire pressure values of tires, and toe-in values of front wheels, meet requirements or not before starting an engine, and besides, detecting whether a handwheel, a steering mechanism and a steering wheel are positioned at the middle position of the whole vehicle; S2, if middle-position calibration is not performed on the electric power-assisted steering tube column, or the middle-position calibration for the electric power-assisted steering tube column is not finished, executing S3, wherein an indication module continuously flashes for indication; S3, comparing standard middle-position information with middle-position calibration information of the electric power-assisted steering tube column, which is detected in real time, if the middle-position calibration information of the electric power-assisted steering tube column, which is detected in real time, is not matched with the standard middle-position information, performing middle-position calibration correcting operation; and S4, if the electric power-assisted steering tube column does not need to continue middle-position calibration, indicating that the middle-position calibration of the electric power-assisted steering tube column is correct by the indication module. The middle-position calibrating method disclosed by the invention is convenient and easy to operate.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a method for calibrating the center position of an electric power steering column. Background technique [0002] For EPS (Electric Power Steering Column) with active centering function, the EPS controller needs to record the middle position of the steering wheel (hereinafter referred to as the median data) before the vehicle leaves the factory, so as to complete functions such as active centering and center position compensation, and improve The stability and reliability of the vehicle steering system. [0003] 1. At present, the steering system mainly ensures that the vehicle has the basic steering return ability through the design of the four-wheel alignment parameters of the whole vehicle. The design requirements are high, and the process effect is not ideal; [0004] 2. The cost of developing four-wheel alignment equipment is high, and the required period is long. Increased...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, the steering system mainly ensures that the vehicle has the basic steering return ability through the design of the four-wheel alignment parameters of the whole vehicle. The design requirements are high, and the process effect is not ideal;

[0004] 2. The cost of developing four-wheel alignment equipment is high, and the required period is long

Increase the cost of vehicle development, while lengthening the vehicle development cycle

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