Rumble strip responsive system: vehicle control on rumble strip

• US 20060224293A1
• Filed: 03/31/2005
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Technical Center North America Incorporated (Nissan Motor Co., Ltd.)
• Inventors: Tsuda, Hiroshi, Kawazoe, Hiroshi
• Granted Patent: US 7,477,978 B2
• Time in Patent Office: Days
• US Class Current: 701/70
• 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 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: B60W 40/064 Degree of grip
• CPC Class Codes: B62D 6/00 Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits means for initiating a change in direction B62D1/00; steering valves B62D5/06; combined with means for inclining the vehicle body or wheels on bends B62D9/00

Abstract

A device adapted to automatically control the effective output of a vehicle control system/component that, for example, automatically applies braking and/or steering control, in response to tire contact with a rumble strip. The device includes a processor configured to receive a first signal indicative of contact of a vehicle tire with a rumble strip. The processor also includes logic to determine that at least one vehicle tire is in contact with a rumble strip based at least on the first signal. If the processor has received the first signal and has determined that the at least one vehicle tire is in contact with the rumble strip, the processor then issues a command to control the effective output of at least one of a vehicle control component or a vehicle control system. For example, an automatically applied braking force may be reduced to ½ its normal applied force.

Claims

1. A device adapted to automatically control the effective output of a vehicle control system/component in response to tire contact with a rumble strip, comprising:

a processor adapted to receive at least a first signal indicative of contact of a first vehicle tire with a rumble strip, wherein the processor includes logic to;

determine that at least one vehicle tire is in contact with a rumble strip based at least on the first signal; and

only if the processor has received the first signal and has determined that the at least one vehicle tire is in contact with the rumble strip, issue a command to control the effective output of at least one of a vehicle control component or a vehicle control system to take into consideration influence of a reduced coefficient of friction due to tire contact with the rumble strip.

2. The device of claim 1, wherein the command is issued after at least one of the respective vehicle control component or the vehicle control system has been engaged.

3. The device of claim 1, wherein the command is issued before at least one of the respective vehicle control component or the vehicle control system has been engaged.

4. The device of claim 1, further comprising a rumble strip sensor adapted to sense input from a rumble strip into the first vehicle tire and output the first signal indicative of contact between the first vehicle tire and the rumble strip.

5. The device of claim 1, wherein the command disables at least one of the vehicle control component or the vehicle control system.

6. The device of claim 5, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control.

7. The device of claim 1, or 15, or 20, wherein the processor is further adapted to receive a second signal indicative of at least one of a freezing outside temperature and a value of an outside temperature, wherein the processor further includes logic to:

analyze the second signal and determine whether the outside temperature is a freezing temperature; and

only if the processor determines that the outside temperature is a freezing temperature, issue the command.

8. The device of claim 1, or 15, or 20, wherein the processor is adapted to receive an input indicative of a type of rumble strip in contact with the first vehicle tire, and wherein the processor further includes logic to analyze the first signal and further issue the command based on the type of rumble strip in contact with the first vehicle tire.

9. The device of claim 1, wherein the processor is adapted to receive an input indicative of a type of rumble strip in contact with the first vehicle tire, and wherein the processor further includes logic to analyze the first signal and further issue the command based on the type of rumble strip in contact with the first vehicle tire, and wherein at least one of (i) the first signal carries the input and (ii) a second signal carries the input.

10. The device of claim 1, wherein the processor is adapted to receive an input indicative of a type of rumble strip in contact with the first vehicle tire, and wherein the processor further includes logic to analyze the first signal and further issue the command based on the type of rumble strip in contact with the first vehicle tire, and wherein the logic to analyze the first signal and issue the command based on the type of rumble strip in contact with the first vehicle tire includes logic to:

determine that the input is indicative of a first type of rumble strip as opposed to at least a second type of rumble strip, and only if a determination is made that the input is indicative of the first type of rumble strip, issue the command, wherein the command controls the effective output of at least one of a vehicle control component or a vehicle control system in a first predetermined manner; and

determine that the input is indicative of a second type of rumble strip as opposed to at least a first type of rumble strip, and only if a determination is made that the input is indicative of the second type of rumble strip, issue the command, wherein the command controls the effective output of at least one of a vehicle control component or a vehicle control system in a second predetermined manner, wherein the second predetermined manner is different than the first predetermined manner.

11. The device of claim 1, wherein the processor is adapted to receive an input indicative of a type of rumble strip in contact with the first vehicle tire, and wherein the processor further includes logic to analyze the first signal and further issue the command based on the type of rumble strip in contact with the first vehicle tire, and wherein the logic to analyze the first signal and further determine whether to issue the command based on the type of rumble strip in contact with the first vehicle tire includes:

logic to analyze the input and determine that the input is indicative of a first type of rumble strip as opposed to at least a second type of rumble strip; and

issue the command only if a determination is made that the input is indicative of a first type of rumble strip as opposed to at least a second type of rumble strip.

12. The device of claim 1, or 5, or 15, or 18, or 20, or 24, wherein the processor is further adapted to:

receive an input indicative of a state of the vehicle with respect to vehicle road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in continued contact with the rumble strip;

determine whether the vehicle is in a state of continued road departure based on the input; and

only if the first vehicle tire is in continued contact with the rumble strip and the vehicle is in the state of continued road departure, issue the command.

13. The device of claim 1, or 5, or 15, or 19, or 20, or 25, wherein the processor is further adapted to:

receive a first input indicative of a side of the vehicle on which the vehicle tire in contact with the rumble strip is located; and

receive a second input indicative of a state of the vehicle with respect to vehicle road departure and direction of road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in a continued contact with the rumble strip;

determine whether the vehicle is in a state of continued road departure based on the second input; and

only if the vehicle is in the state of continued road departure, and, with respect to a lateral direction of the vehicle, only if the direction of road departure is opposite the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located, issue the command.

14. The device of claim 9, wherein at least one of the first signal carries the input and a second signal carries at least a portion of the input.

15. The device of claim 1, wherein the command partially limits the effective output of at least one of the vehicle control component or the vehicle control system.

16. The device of claim 15, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control.

17. The device of claim 15, wherein the processor is further adapted to receive a second signal indicative of at least one of a freezing outside temperature and a value of an outside temperature, wherein the processor further includes logic to:

analyze the second signal and determine whether the outside temperature is a freezing temperature; and

only if the processor determines that the outside temperature is a freezing temperature, issue the command.

18. The device of claim 1, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control, and wherein the issued command changes a ratio of right to left automatic brake application.

19. The device of claim 1, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control, and wherein the issued command changes a ratio of right to left automatic brake application, wherein the ratio of right to left automatic brake application is greater than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the right side, and wherein the ratio of right to left automatic brake application is lesser than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the left side.

20. The device of claim 1, wherein the command reduces at least one of a gain of the vehicle control component or a gain of the vehicle control system.

21. The device of claim 20, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control.

22. The device of claim 20, wherein the processor is further adapted to receive a second signal indicative of at least one of a freezing outside temperature and a value of an outside temperature, wherein the processor further includes logic to:

analyze the second signal and determine whether the outside temperature is a freezing temperature; and

only if the processor determines that the outside temperature is a freezing temperature, issue the command.

23. The device of claim 20, wherein the processor is further adapted to:

receive a first input indicative of a side of the vehicle on which the vehicle tire in contact with the rumble strip is located; and

receive a second input indicative of a state of the vehicle with respect to vehicle road departure and direction of road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in a continued contact with the rumble strip;

determine whether the vehicle is in a state of continued road departure based on the second input; and

only if the vehicle is in the state of continued road departure, and, with respect to a lateral direction of the vehicle, only if the direction of road departure is opposite the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located, issue the command.

24. The device of claim 21, wherein the issued command changes a ratio of right to left automatic brake application.

25. The device of claim 21, wherein the issued command changes a ratio of right to left automatic brake application, wherein the ratio of right to left automatic brake application is greater than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the right side, and wherein the ratio of right to left automatic brake application is less than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the left side.

29. The device of claim 1, wherein the processor is adapted to receive an input indicative of a type of rumble strip in contact with the first vehicle tire, wherein the processor further includes logic to analyze the first signal and further issue the command based on the type of rumble strip in contact with the first vehicle tire, wherein the command activates at least one of a vehicle control component or a vehicle control system, and wherein the logic to analyze the first signal and issue the command based on the type of rumble strip in contact with the first vehicle tire includes logic to:

determine that the input is indicative of a first type of rumble strip as opposed to at least a second type of rumble strip, and only if a determination is made that the input is indicative of the first type of rumble strip, issue the command.

26. A device adapted to automatically control the effective output of a vehicle control system/component in response to tire contact with a rumble strip, comprising:

a processor adapted to receive at least a first signal indicative of at least one of (i) contact of a first vehicle tire with a rumble strip and (ii) absence of contact of the first vehicle tire with a rumble strip, wherein the processor includes logic to;

determine that no vehicle tire is in contact with a rumble strip based at least on one of (i) the first signal and (ii) an absence of the first signal; and

only if the processor has determined that no vehicle tire is in contact with the rumble strip, issue a command to enable at least one of a vehicle control component or a vehicle control system.

27. The device of claim 26, wherein at least one of the vehicle control component or the vehicle control system includes at least one of a brake control and a steering control.

28. The device of claim 26, wherein the processor is further adapted to receive a second signal indicative of at least one of a freezing outside temperature and a value of an outside temperature, wherein the processor further includes logic to:

analyze the second signal and determine whether the outside temperature is a freezing temperature; and

only if the processor determines that the outside temperature is not a freezing temperature, issue the command, wherein the command activates at least one of a vehicle control component or a vehicle control system.

30. The device of claim 26, wherein the processor is further adapted to:

receive a second input indicative of a state of the vehicle with respect to vehicle road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in continued contact with the rumble strip;

determine whether the vehicle is in a state of continued road departure based on the second input; and

only if the first vehicle tire is not in continued contact with the rumble strip and the vehicle is in the state of continued road departure, issue the command.

31. The device of claim 26, wherein the processor is further adapted to:

receive a first input indicative of a side of the vehicle on which the vehicle tire in contact with the rumble strip is located; and

receive a second input indicative of a state of the vehicle with respect to vehicle road departure and direction of road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in a continued contact with the rumble strip;

determine whether the vehicle is in a state of continued road departure based on the second input; and

only if the vehicle is in the state of continued road departure, and, with respect to a lateral direction of the vehicle, only if the direction of road departure is the same as the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located, issue the command.

32. The device of claim 27, wherein the processor is further adapted to:

receive an input indicative of a state of the vehicle with respect to vehicle road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in continued contact with the rumble strip;

determine whether the vehicle is in a state of road departure recovery or continued road departure based on the second input; and

only if the first vehicle tire is not in continued contact with the rumble strip and the vehicle is in the state of continued road departure, issue the command;

wherein the issued command changes a ratio of right to left automatic brake application.

33. The device of claim 27, wherein the processor is further adapted to:

receive a first input indicative of a side of the vehicle on which the tire in contact with the rumble strip is located; and

receive a second input indicative of a state of the vehicle with respect to vehicle road departure and direction of road departure;

wherein the processor further includes logic to;

determine whether the first vehicle tire is in a continued contact with the rumble strip;

determine whether the vehicle is in a state of road departure recovery or continued road departure based on the second input; and

only if the vehicle is in the state of continued road departure, and, with respect to a lateral direction of the vehicle, only if the direction of road departure is the same as the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located, issue the command;

wherein the issued command changes a ratio of right to left automatic brake application, wherein the ratio of right to left automatic brake application is greater than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the right side, and wherein the ratio of right to left automatic brake application is less than one if the side of the vehicle on which the vehicle tire in continued contact with the rumble strip is located is the left side.

34. A program product for automatically controlling the effective output of vehicle control system/component in response to tire contact with a rumble strip comprising machine-readable program code for causing, when executed, a machine to perform the following method:

determine that at least one vehicle tire is in contact with a rumble strip based at least on a first signal indicative of contact between a vehicle tire and a rumble strip; and

only if the processor has received the first signal and has determined that the at least one vehicle tire is in contact with the rumble strip, issue a command to control the effective output of at least one of a vehicle control component or a vehicle control system.