Forward vehicle brake warning system

• US 8,854,198 B2
• Filed: 12/17/2008
• Issued: 10/07/2014
• Est. Priority Date: 11/17/2005
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan North America Incorporated (Nissan Motor Co., Ltd.)
• Inventors: Tengler, Steve, Heft, Ronald
• Primary Examiner(s): HUNNINGS, TRAVIS R
• Application Number:
  US12/337,169
• Publication Number:
  US 20090096598A1
• Time in Patent Office: 2,120 Days
• Field of Search: 340/435, 340/436, 340/438, 340/901, 340/902, 340/903, 340/905, 701/301
• US Class Current: 340/436
• CPC Class Codes: G08G 1/0965 responding to signals from another vehicle, e.g. emergency vehicle
• CPC Class Codes: G08G 1/161 Decentralised systems, e.g. inter-vehicle communication

Abstract

A forward vehicle brake warning system includes an incoming message receiving component, an adverse driving condition obtaining component, an incoming message relevancy component, a relevancy adjustment component and a driver warning component. The incoming message receiving component is configured to receive hard brake messages from neighboring vehicles located within a prescribed communication region around a host vehicle. The adverse driving condition obtaining component is configured to receive driving condition information affecting drivability of the host vehicle. The incoming message relevancy component is configured to perform a relevancy determination of the hard brake messages. The relevancy adjustment component is configured to adjust the relevancy determination to selectively filter the hard brake messages received depending upon the driving condition information. The driver warning component configured to alert a driver of the host vehicle.

Claims

1. A forward vehicle brake warning system comprising:

an incoming message receiving component that receives hard brake messages from neighboring vehicles located within a prescribed communication region around a host vehicle equipped with the forward vehicle brake warning system, each of the hard brake messages including a vehicle location of a corresponding one of the neighboring vehicles and a hard brake indication;

an incoming message relevancy component that performs a relevancy determination, based on the vehicle location of the neighboring vehicle sending the hard brake messages received by the incoming message receiving component, determining the hard brake messages are relevant in response to the vehicle location being within an adjustable zone of interest, determining the hard brake messages are irrelevant in response to the vehicle location being outside the adjustable zone of interest, filtering out irrelevant hard brake messages and retaining relevant messages, the adjustable zone of interest being an area in front of the host vehicle that is bound by a maximum distance ahead measured from the front of the host vehicle forward along a current trajectory of the host vehicle and a lateral dimension measured relative to the front of the host vehicle side-to-side from the current trajectory of the host vehicle;

a relevancy adjustment component that adjusts the relevancy determination by selectively changing the maximum distance ahead of the adjustable zone of interest relative to the host vehicle and changing the lateral dimension to selectively filter the hard brake messages received such that in response to a decrease in the maximum distance, the lateral dimension is increased and in response to an increase in the maximum distance the lateral dimension is decreased; and

a driver warning component that alerts a driver of the host vehicle with a warning signal in response to relevant messages identified during the relevancy determination by the incoming message relevancy component.

2. The forward vehicle brake warning system as set forth in claim 1, wherein

the relevancy adjustment component selectively changes the maximum distance in response to changes in visibility impairing conditions.

3. The forward vehicle brake warning system as set forth in claim 1, further comprising

an adverse driving condition obtaining component that receives driving condition information affecting drivability of the host vehicle, wherein the relevancy adjustment component adjusts the relevancy determination based on the driving condition information;

and

wherein the relevancy adjustment component selectively changes the lateral dimension view in response to changes in traction impairing conditions.

4. The forward vehicle brake warning system as set forth in claim 1, wherein

the adjustable zone of interest is further bound by a minimum distance ahead measured from the front of the host vehicle forward along a current trajectory of the host vehicle such that the incoming message relevancy component determines whether or not the hard brake messages are relevant in response to the vehicle location being within the adjustable zone of interest between the minimum distance and maximum distance, and determines the hard brake messages are irrelevant in response to the vehicle location being outside the adjustable zone of interest.

5. The forward vehicle brake warning system as set forth in claim 4, wherein

the relevancy adjustment component further adjusts the relevancy determination by selectively changing the minimum distance of the adjustable zone of interest relative to the host vehicle.

6. The forward vehicle brake warning system as set forth in claim 1, wherein

the relevancy adjustment component adjusts the relevancy determination based on a detected host vehicle speed.

7. The forward vehicle brake warning system as set forth in claim 1, further comprising

an adverse driving condition obtaining component that receives driving condition information affecting drivability of the host vehicle, wherein the relevancy adjustment component adjusts the relevancy determination based on the driving condition information.

8. The forward vehicle brake warning system as set forth in claim 7, wherein

the adverse driving condition obtaining component further includes a host vehicle operating state section that detects a host vehicle operating state of the host vehicle as the driving condition information.

9. The forward vehicle brake warning system as set forth in claim 8, wherein

the host vehicle operating state section detects operation of a host vehicle traction control system as the host vehicle operating state.

10. The forward vehicle brake warning system as set forth in claim 8, wherein

the host vehicle operating state section detects operation of a host vehicle windshield wiper system as the host vehicle operating state.

11. The forward vehicle brake warning system as set forth in claim 7, wherein

the adverse driving condition obtaining component further includes a weather condition receiving section that detects weather conditions of the host vehicle as the driving condition information.

12. A forward vehicle brake warning system comprising:

an incoming message receiving component that receives hard brake messages from neighboring vehicles located within a prescribed communication region around a host vehicle equipped with the forward vehicle brake warning system;

an incoming message relevancy component that performs a relevancy determination of the hard brake messages received by the incoming message receiving component, filtering out irrelevant hard brake messages transmitted from neighboring vehicles outside an adjustable zone of interest and retaining relevant messages transmitted from neighboring vehicles within the adjustable zone of interest, the adjustable zone of interest being an area in front of the host vehicle that is bound by a maximum distance ahead measured from the front of the host vehicle forward along a current trajectory of the host vehicle and a lateral dimension measured relative to the front of the host vehicle side-to-side from the current trajectory of the host vehicle;

a relevancy adjustment component that adjusts the maximum distance ahead and the lateral dimension to selectively filter the hard brake messages received, such that in response to a decrease in the maximum distance, the lateral dimension is increased and in response to an increase in the maximum distance the lateral dimension is decreased; and

a driver warning component that alerts a driver of the host vehicle with a warning signal in response to relevant messages identified during the relevancy determination by the incoming message relevancy component.

13. The forward vehicle brake warning system as set forth in claim 12, wherein

the relevancy adjustment component further adjusts the relevancy determination based on a detected host vehicle speed.

14. The forward vehicle brake warning system as set forth in claim 12, further comprising

an adverse driving condition obtaining component that receives driving condition information affecting drivability of the host vehicle, wherein the relevancy adjustment component adjusts the relevancy determination based on the driving condition information.

15. The forward vehicle brake warning system as set forth in claim 14, wherein

the relevancy adjustment component selectively changes the maximum distance in response to changes in visibility impairing conditions.

16. The forward vehicle brake warning system as set forth in claim 14, wherein

the relevancy adjustment component selectively changes the lateral dimension in response to changes in traction impairing conditions.

17. The forward vehicle brake warning system as set forth in claim 14, wherein

the adverse driving condition obtaining component further includes a host vehicle operating state section that detects a host vehicle operating state of the host vehicle as the driving condition information.

18. The forward vehicle brake warning system as set forth in claim 17, wherein

the host vehicle operating state section detects operation of a host vehicle traction control system as the host vehicle operating state.

19. The forward vehicle brake warning system as set forth in claim 17, wherein

the host vehicle operating state section detects operation of a host vehicle windshield wiper system as the host vehicle operating state.

20. The forward vehicle brake warning system as set forth in claim 14, wherein

the adverse driving condition obtaining component further includes a weather condition receiving section that detects weather conditions of the host vehicle as the driving condition information.

21. The forward vehicle brake warning system as set forth in claim 12, wherein the lateral dimension of the adjustable zone of interest is defined by a lateral angle of view of the host vehicle.

22. A forward vehicle brake warning system comprising:

an incoming message receiving component that receives hard brake messages from neighboring vehicles located within a prescribed communication region around a host vehicle equipped with the forward vehicle brake warning system, the hard brake messages each including a vehicle location of the corresponding neighboring vehicle, and a hard brake indication;

an incoming message relevancy component that performs a relevancy determination of the hard brake messages received by the incoming message receiving component determining the hard brake messages are relevant when the vehicle location of the neighboring vehicle sending the hard brake message is within an adjustable zone of interest, and determining the hard brake messages are irrelevant when the vehicle location of the neighboring vehicle sending the hard brake message is outside of the adjustable zone of interest, filtering out irrelevant hard brake messages and retaining relevant messages, the adjustable zone of interest being an area in front of the host vehicle that is bound between a minimum distance, a maximum distance ahead measured from the front of the host vehicle forward along a current trajectory of the host vehicle and a lateral dimension measured relative to the front of the host vehicle side-to-side from the current trajectory of the host vehicle, the minimum distance being spaced apart from the front of the host vehicle and the maximum distance, the maximum distance being confined to a length smaller than the distance to areas outside the prescribed communication region;

a relevancy adjustment component that adjusts the maximum distance ahead and the lateral dimension to selectively filter the hard brake messages received, such that in response to a decrease in the maximum distance, the lateral dimension is increased and in response to an increase in the maximum distance the lateral dimension is decreased; and

a driver warning component that alerts a driver of the host vehicle with a warning signal in response to relevant messages identified during the relevancy determination by the incoming message relevancy component.