Method for operating a transversal guidance system of a motor vehicle, and motor vehicle

Patent metadata

Field	Value
Publication number	US-10875524-B2
Application number	US-201615571383-A
Country	US
Kind code	B2
Filing date	Mar 11, 2016
Priority date	May 8, 2015
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

The invention elates to a method for operating a transversal guidance system of a motor vehicle through two independent channels to perform automatic transversal guidance interventions. Through the first channel, transversal interventions are performed via a first transversal guidance actuator controlled by means of a driver-operated steering handle. Through the second channel, a vehicle system sets a target, roll angle, and a second transversal guidance actuator is controlled by a transversal guidance system that performs a transversal guidance intervention based on the roll angle. The vehicle system displays the roll angle as a notification to the driver of the transversal guidance intervention. The invention also relates to a motor vehicle configured to perform the method.

First claim

The invention claimed is:

1. A method for operating a transversal guidance system of a motor vehicle, that is adapted to perform an automatic transversal guidance intervention through two independent channels, comprising:
controlling, in a first channel, a first transversal guidance actuator by means of a steering handle operated by a driver; and
controlling, in a second channel, a second transversal guidance actuator, which does not have an effect on the steering handle, to perform the transversal guidance intervention, comprising:
setting a target roll angle by a vehicle system;
setting a display roll angle of the motor vehicle that depends on at least one intervention parameter describing at least one of a direction or a magnitude of the transversal guidance intervention based on the target roll angle set by the vehicle system; and
notifying the driver of the transversal guidance intervention by the display roll angle.

2. The method of claim 1 , further comprising:
using the first transversal guidance actuator, which is or may be separated from the steering handle, as the second transversal guidance actuator.

3. The method of claim 1 , further comprising:
using an additional transversal guidance actuator as the second transversal guidance actuator, which is different from the first transversal guidance actuator.

4. The method of claim 1 , further comprising:
using, as the first transversal guidance actuator, a front axle steering system coupled with the steering handle;
using, as the second transversal guidance actuator, a rear axle steering system, a braking system allowing different braking interventions on opposite sides of the motor vehicle, an overlap steering system, or an active lane adjusting system; or
using, as the vehicle system, an active driving system for setting the display roll angle.

5. The method of claim 1 , wherein the display roll angle is selected according to a virtual steering angle of the steering handle leading to the same transversal guidance effect caused by the transversal guidance intervention.

6. The method of claim 1 , wherein the display roll angle is selected according to a currently acting transversal force due to the transversal guidance intervention.

7. The method of claim 1 , wherein the display roll angle is scaled according to a presetting by the driver.

8. The method of claim 1 , further comprising:
using, as the transversal guidance system, a lane tracking system, a safety system, or a vehicle guidance system adapted for full automatic guidance of the vehicle.

9. The method of claim 1 , further comprising:
assessing, by the transversal guidance system, whether a criticality criterion is met, wherein if the criticality criterion indicates that a situation requires attention of the driver for the transversal guidance intervention planned by the transversal guidance system, further comprising:
controlling, by the transversal guidance system, the steering handle to output an indication signal that attracts the attention of the driver,
wherein the indication signal comprises a vibration or an oscillation of the steering handle.

10. The method of claim 9 , wherein the criticality criterion describes the transversal guidance system approaching a system limit of the transversal guidance system while dropping below at least one threshold value.

11. A motor vehicle, comprising:
a first transversal guidance actuator;
a second transversal guidance actuator;
a steering handle;
a transversal guidance system; and
a vehicle system, configured to:
control the first transversal guidance actuator by means of the steering handle operated by a driver; and
control the second transversal guidance actuator, which does not have an effect on the steering handle, to perform the transversal guidance intervention, comprising:
setting a target roll angle by the vehicle system;
setting a display roll angle of the motor vehicle that depends on at least one intervention parameter describing at least one of a direction or a magnitude of the transversal guidance intervention based on the target roll angle set by the vehicle system; and
notifying the driver of the transversal guidance intervention by the display roll angle.

12. The motor vehicle of claim 11 , further comprising:
a control device of the transversal guidance system configured to:
use the first transversal guidance actuator, which is or may be separated from the steering handle, as the second transversal guidance actuator.

13. The motor vehicle of claim 11 , further comprising:
a control device of the transversal guidance system configured to:
use an additional transversal guidance actuator as the second transversal guidance actuator, which is different from the first transversal guidance actuator.

14. The motor vehicle of claim 11 , further comprising:
using, as the first transversal guidance actuator, a front axle steering system coupled with the steering handle;
using, as the second transversal guidance actuator, a rear axle steering system, a braking system allowing different braking interventions on opposite sides of the motor vehicle, an overlap steering system, or an active lane adjusting system; or
using, as the vehicle system, an active driving system for setting the display roll angle.

15. The motor vehicle of claim 11 , wherein the display roll angle is selected according to a virtual steering angle of the steering handle leading to the same transversal guidance effect caused by the transversal guidance intervention.

16. The motor vehicle of claim 11 , wherein the display roll angle is selected according to a currently acting transversal force due to the transversal guidance intervention.

17. The motor vehicle of claim 11 , wherein the display roll angle is scaled according to a presetting by the driver.

18. The motor vehicle of claim 11 , further comprising: using, as the transversal guidance system, a lane tracking system, a safety system, or a vehicle guidance system adapted for full automatic guidance of the vehicle.

19. The motor vehicle of claim 11 , further comprising:
assessing, by the transversal guidance system, whether a criticality criterion is met, wherein if the criticality criterion indicates that a situation requires the attention of the driver for the transversal guidance intervention planned by the transversal guidance system, further comprising:
controlling, by the transversal guidance system, the steering handle to output an indication signal that attracts the attention of the driver,
wherein the indication signal comprises a vibration or an oscillation of the steering handle.

20. The motor vehicle of claim 19 , wherein the criticality criterion describes the transversal guidance system approaching a system limit of the transversal guidance system while dropping below at least one threshold value.

Assignees

• Audi Ag

Inventors

• Mueller Christoph

Classifications

• B60Y2300/82

  Torque vectoring · CPC title

• B60W2520/125

  Lateral acceleration · CPC title

• B60T2201/08

  Lane monitoring; Lane Keeping Systems · CPC title

• B60T2260/06

  Active Suspension System · CPC title

• B60W10/18

  including control of braking systems · CPC title