Method for electromechanically setting steering angle and motor vehicle comprising electromechanical steering system

A technology of steering device and motor vehicle, applied in steering mechanism, power steering mechanism, steering rod and other directions, can solve the problems of reducing driving safety and driving comfort, and achieve high driving comfort and driving safety, driving safety improved effect

Active Publication Date: 2013-03-06
AUDI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces driving safety and driving comfort, since the driver must actively countersteer in order to maintain the original direction of travel

Method used

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  • Method for electromechanically setting steering angle and motor vehicle comprising electromechanical steering system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Motor vehicle 10 has an electromechanical steering system 12 . The electromechanical steering system can be designed as a superposition steering system, in which an additional steering angle provided by the electric motor can be combined with the steering angle provided by the driver, for example by means of a transmission connected to the steering system. The predetermined steering wheel angle is superimposed on the operating device 14 . As an alternative, the electromechanical steering device 12 can also be designed as a “steer-by-wire” steering system.

[0020] The two rear wheels 16 , 18 are driven by two different electric motors 20 , 22 . It is conceivable that the front wheels 24 , 26 are also driven by a further different electric motor.

[0021] Now, if the electric motor 20 fails, a yaw moment is generated when the motor vehicle 10 is moving. The magnitude of the yaw moment depends on the drive force Fa produced by the wheels 18 that are still being driven....

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PUM

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Abstract

In order to make available a method for electromechanically setting a steering angle, which method increases the driving comfort and the driving safety when driving a motor vehicle (10), an additional steering angle is defined as a function of an operating state of at least one machine (20, 22) for driving a wheel (16, 18) and / or at least one variable which represents this operating state. The additional steering angle which is defined in such a way is then superimposed on, or added to a steering angle which has been predefined by a driver by means of a steering handle (14). The steering wheel angle can in this way be at least partially decoupled from the steering angle of the wheel. As a result, the setting of the steering angle with the electromechanical steering system is better adapted to a current driving situation.

Description

technical field [0001] The invention relates to a method for electromechanically adjusting the steering angle of the type mentioned in the preamble of claim 1 . The invention also relates to a motor vehicle of the type mentioned in the preamble of claim 5 . Background technique [0002] The use of electromechanical steering systems has been described for modern motor vehicles. In the electromechanical steering system, a distinction is made between so-called “steer-by-wire” steering systems and steering systems with superimposed transmissions. [0003] With the "steer-by-wire" steering system, the driver's steering presets at the steering wheel can be determined by means of sensors and then carried out exclusively electrically by means of electromechanical actuators. An additional steering angle can also be combined with the driver's steering preset in order to increase the stability of the motor vehicle in certain driving situations. [0004] In steering systems with supe...

Claims

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Application Information

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IPC IPC(8): B62D6/00B62D137/00
CPCB62D6/002B62D5/008
Inventor T・迈斯纳M・魏因M・罗伊特
Owner AUDI AG
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