Lane departure avoidance control

• US 20070225914A1
• Filed: 03/21/2006
• Published: 09/27/2007
• Est. Priority Date: 03/21/2006
• Status: Abandoned Application

• Current Assignee: Nissan Technical Center North America Incorporated (Nissan Motor Co., Ltd.)
• Original Assignee: Nissan Technical Center North America Incorporated (Nissan Motor Co., Ltd.)
• Inventors: Tsuda, Hiroshi, Kawazoe, Hiroshi
• Application Number:
  US11/385,393
• Publication Number:
  US 20070225914A1
• Time in Patent Office: Days
• US Class Current: 701/301
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 2050/0024 Variable gains
• CPC Class Codes: B60W 30/12 Lane keeping
• 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

Abstract

An a lane departure prevention system is described having a position detector for detecting positional information of a vehicle with respect to a lane of travel. A determining unit is included for comparing the positional information with a first threshold value indicating a predetermined positional relation with respect to the lane of travel, and for determining a tendency of the vehicle to depart from the lane of travel on the basis of a comparison result. At least one control is selectively adjusted when the determining unit determines that the vehicle is tending to depart from the lane of travel. The at least one control is selectively delayed or selectively reduced as a result of a proximate predetermined physical object.

Claims

1. A lane departure prevention system comprising:

a position detector for detecting positional information of a vehicle with respect to a lane of travel;

a determining unit for comparing said positional information with a first threshold value indicating a predetermined positional relation with respect to said lane of travel, and for determining a tendency of said vehicle to depart from said lane of travel on the basis of a comparison result; and

at least one control being selectively adjusted as a result of a predetermined physical object.

2. The lane departure prevention system of claim 1, wherein said at least one control is at least one of selectively delayed and selectively reduced.

3. The lane departure prevention system of claim 1, wherein said at least one control is at least one of a warning control, a steering control, a gain control, and a braking control.

4. The lane departure prevention system of claim 1, wherein said physical object is in an adjacent lane.

5. The lane departure prevention system of claim 1, wherein said physical object is adjacent said lane of travel.

6. The lane departure prevention system of claim 1, wherein said lane of travel includes a first lane edge proximate to said physical object and a second lane edge distant from said physical object and a controlled position is shifted toward said second lane edge when said vehicle is proximate to said physical object.

7. The lane departure prevention system of claim 1, wherein said lane of travel includes a first lane edge proximate to said physical object and a second lane edge distant from said physical object and said at least one control is at least one of selectively delayed and selectively reduced in response to a distance between said physical object and said first lane edge.

8. The lane departure prevention system of claim 1, wherein said at least one control is at least one of selectively delayed and selectively reduced in response to at least one characteristic of said physical object.

9. The lane departure prevention system of claim 8, wherein said at least one characteristic of said physical object is size.

10. The lane departure prevention system of claim 8, wherein said at least one characteristic of said physical object is its relative velocity with respect to said vehicle.

11. The lane departure prevention system of claim 8, wherein said at least one characteristic of said physical object is at least a subset of (i) the size of said physical object, (ii) its position relative to said vehicle, and (iii) relative velocity with respect to said vehicle.

12. The lane departure prevention system of claim 8, wherein a TTLC/gain is at least one of selectively delayed and selectively reduced in response to at least one characteristic of said physical object being at least a subset of (i) the size of said physical object, (ii) its position relative to said vehicle, and (iii) relative velocity with respect to said vehicle.

13. The lane departure prevention system of claim 1, wherein said at least one control is at least one of selectively delayed and selectively reduced in response to a user'"'"'s driving behavior.

14. The lane departure prevention system of claim 11, wherein said driving behavior is recorded and stored.

15. The lane departure prevention system of claim 1, wherein said lane of travel includes a first lane edge and a second lane edge and said at least one control is not selectively adjusted by selectively delaying or selectively reducing said at least one control if a first physical object is disposed proximate said first lane edge and a second physical object is disposed proximate said second lane edge.

16. A lane departure prevention method comprising:

detecting positional information of a vehicle with respect to a lane of travel;

comparing said positional information with a first threshold value indicating a predetermined positional relation with respect to said lane of travel, and for determining a tendency of said vehicle to depart from said lane of travel on the basis of a comparison result; and

selectively adjusting at least one vehicle control as a result of a predetermined physical object.

17. The lane departure prevention method of claim 16, wherein said adjusting includes at least one of selectively delaying and selectively reducing said at least one vehicle control.

18. The lane departure prevention method of claim 16, wherein said lane of travel includes a first lane edge proximate to said physical object and a second lane edge distant said physical object, further including shifting a controlled position toward said second lane edge as said vehicle is proximate said physical object.

19. The lane departure prevention method of claim 16, wherein said adjusting includes at least one of selectively delaying and selectively reducing in response to a size of said physical object.

20. The lane departure prevention method of claim 16, wherein said adjusting includes at least one of selectively delaying and selectively reducing in response to a difference in velocity between said vehicle and said physical object.

21. The lane departure prevention method of claim 16, wherein said adjusting includes at least one of selectively delaying and selectively reducing in response to a relative velocity with respect to said physical object.

22. The lane departure prevention method of claim 16, wherein said lane of travel includes a first lane edge proximate said physical object and a second lane edge distant said physical object, said adjusting includes at least one of selectively delaying and said selectively reducing in response to a relative position between said physical object and said first lane edge.

23. The lane departure prevention method of claim 16, wherein adjusting includes at least one of said selectively delaying and said selectively reducing in response to a user'"'"'s driving behavior.

24. The lane departure prevention system of claim 16, further including recording and storing a user'"'"'s driving behavior.