Method for controlling a rear axle steering system of a motor vehicle

A technology for motor vehicles and rear axles, which is applied to steering mechanisms, steering rods, and automatic steering control components. It can solve problems such as loss of control and inward deflection of motor vehicles, and achieve steering movement prevention, increased driving safety, and improved driving performance. safety effect

CN109747710BActive Publication Date: 2021-06-22AUDI AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-06-22

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Abstract

The invention relates to a method for controlling a rear axle steering system (6) of a motor vehicle (1), wherein the steering angle of wheels of the rear axle (4) is adjusted. When a predetermined lateral acceleration of the motor vehicle (1) is reached, the steering angle and / or the gradient of the steering angle of the wheels of the rear axle (4) is limited depending on the friction value of the road surface on which the motor vehicle (1) is driving.
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Description

technical field

[0001] The invention relates to a method for controlling the steering of a rear axle of a motor vehicle, in which the steering angle of the wheels of the rear axle is adjusted, and to a device for carrying out the method. Background technique

[0002] Vehicles currently produced are basically designed to understeer for safety reasons. When cornering in the limit range of lateral dynamics, the slip angle at the rear axle is smaller than at the front axle, which prevents the vehicle from turning uncontrollably inwards and allows the driver to control it.

[0003] Motor vehicles with rear-wheel or rear-axle steering strongly influence the dynamic relationship of the slip angle between the front and rear axles. With a suitable counter-steering movement of the rear axle relative to the front axle, the driving behavior changes in the direction of oversteer. With a steering movement in the same direction, the driving behavior is instead shifted in the direction of...

Examples

Embodiment Construction

[0021] figure 1 A motor vehicle 1 is shown very schematically, which has a body 2 , a front axle 3 and a rear axle 4 in a known manner. In this case both the front axle 3 and the rear axle 4 are steering axles. The manner and method of how the front axle 3 and the rear axle 4 turn will not be described in detail here. However, a corresponding steering system is also shown very schematically, which is assigned to the front axle 3 or the rear axle 4 and with which the front axle 3 and the rear axle 4 are steered. The steering system of the front axle 3 is referred to here as the front axle steering system 5 and the steering system of the rear axle 4 as the rear axle steering system 6 . The front-axle steering system 5 is here in principle independent of the rear-axle steering system 6 , but it is also possible to establish a specific correlation, which is not mechanical but electronic.

[0022] The rear axle steering system 6 has a steering angle adjusting device 7 , which ba...