Driver assistance system and method for its control

• US 20070203617A1
• Filed: 01/31/2007
• Published: 08/30/2007
• Est. Priority Date: 02/02/2006
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Haug, Karsten
• Application Number:
  US11/701,025
• Publication Number:
  US 20070203617A1
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60T 2201/08 Lane monitoring; Lane Keeping Systems
• CPC Class Codes: B60T 2201/083 using active brake actuation
• CPC Class Codes: B60T 2201/087 using active steering actuation
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 2050/0071 Controller overrides driver automatically
• CPC Class Codes: B60W 2050/0073 Driver overrides controller
• CPC Class Codes: B60W 2420/40 Photo, light or radio wave sensitive means, e.g. infrared sensors
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 2556/20 Data confidence level
• CPC Class Codes: B60W 2710/20 Steering systems
• CPC Class Codes: B60W 2720/403 between front and rear axle
• CPC Class Codes: B60W 30/12 Lane keeping
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: B62D 15/025 Active steering aids, e.g. helping the driver by actively influencing the steering system after environment evaluation B62D1/28 takes precedence
• CPC Class Codes: B62D 15/029 Steering assistants using warnings or proposing actions to the driver without influencing the steering system

Abstract

A driver assistance system 1 includes at least driver assistance functions such as LDW (lane departure warning) and LKS (lane keeping support). The activation and deactivation of the driver assistance functions (LDW, LKS) are a function of a confidence level V.

Claims

1. A driver assistance system, comprising:

an arrangement for providing at least driver assistance functions, including at least one of LDW (lane departure warning) and LKS (lane keeping support), wherein activation and deactivation of the driver assistance functions are a function of a confidence level.

2. The driver assistance system of claim 1, wherein a size of a torque provided for automatic lateral steering of the vehicle is a function of the confidence level.

3. The driver assistance system of claim 1, wherein the confidence level is a function of a quality of a lane detection.

4. The driver assistance system of claim 1, wherein a grayscale gradient of roadway markings or lane markings, is taken into consideration when ascertaining the confidence level.

5. The driver assistance system of claim 1, wherein the confidence level is a function of a reciprocal of a sum of error squares of lane support points of a lane trajectory.

6. The driver assistance system of claim 1, wherein the confidence level is a function of consistency of lane information over sequentially recorded frames of an image detection system.

7. The driver assistance system of claim 1, wherein the confidence level is a function of a plausibility comparison between signals of an ambient environmental sensor and signals of a navigation system.

8. The driver assistance system of claim 1, wherein the confidence level is a function of an ambient brightness.

9. The driver assistance system of claim 1, wherein the confidence level is a function of a signal of a rain sensor.

10. The driver assistance system of claim 1, wherein the confidence level is a function of a signal of a mist sensor.

11. The driver assistance system of claim 1, wherein the confidence level is a function of a signal of a temperature sensor.

12. The driver assistance system of claim 1, wherein an interface is provided for representing states of the driver assistance functions.

13. The driver assistance system of claim 1, wherein the interface includes at least one of light emitting diodes and an acoustic warning unit.

14. A method for controlling a driver assistance system, which includes a driver assistance function, including at least one of LDW (lane departure warning) and LKS (lane keeping support), the method comprising:

determining a confidence level and at least one of an activation and a deactivation of the driver assistance functions as a function of a confidence level.

15. The method of claim 14, wherein threshold values are provided for the confidence level, and if the confidence level falls below a threshold value, a characteristic quantity of the driver assistance function is at least reduced, or a driver assistance function is deactivated.

16. The method of claim 14, wherein the confidence level is reduced stepwise.

17. The method of claim 14, wherein the confidence level is reduced continuously.