Deceleration setting system, deceleration setting method, and deceleration setting program

• US 9,469,299 B2
• Filed: 08/22/2014
• Issued: 10/18/2016
• Est. Priority Date: 08/22/2013
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Niwa, Toshiaki, Kodan, Tomoki, Tanaka, Kuniaki
• Primary Examiner(s): Shaawat, Mussa A
• Application Number:
  US14/466,212
• Publication Number:
  US 20150057905A1
• Time in Patent Office: 788 Days
• US Class Current: 1/1
• CPC Class Codes: B60W 2555/60 Traffic rules, e.g. speed limits or right of way
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 2720/106 Longitudinal acceleration
• CPC Class Codes: B60W 30/143 Speed control B60W30/16 takes precedence
• CPC Class Codes: B60W 30/18109 Braking
• CPC Class Codes: G08G 1/096725 where the received information generates an automatic action on the vehicle control

Abstract

Deceleration control systems, methods, and programs acquire from learning information a target deceleration point in front of a traveling vehicle and an associated deceleration end point. The deceleration end point is a point representative of one or more locations at which deceleration of the vehicle or another vehicle was actually completed in the past as the vehicle or the other vehicle approached the associated deceleration end point. The systems, methods, and programs determine a distance between the acquired target deceleration point and the acquired deceleration end point as a predicted distance over which traffic is present. The systems, methods, and programs communicate with a vehicle ECU to perform a deceleration control of the vehicle so that (i) the longer the determined distance, the greater the deceleration rate applied during the deceleration control, and (ii) the deceleration is complete by the time the vehicle reaches the acquired deceleration end point.

Claims

1. A deceleration setting system for a vehicle, the system comprising:

a memory that stores;

a computer-executable deceleration control program; and

map information describing a map;

a processor that, when the deceleration control program is executed;

accesses learning information, the learning information including target deceleration points associated with deceleration end points, each target deceleration point being a point on a road where deceleration of the vehicle must be completed, and each deceleration end point being a point representative of one or more locations at which deceleration of the vehicle or another vehicle was actually completed in the past as the vehicle or the other vehicle approached the associated deceleration end point;

acquires from the learning information a target deceleration point in the direction of travel of the vehicle and the deceleration end point associated with the acquired target deceleration point;

based on the map information, determines a distance between the acquired target deceleration point and the acquired deceleration end point;

predicts that the determined distance is a distance over which traffic is present prior to the target deceleration point in the direction of travel of the vehicle; and

communicates with a vehicle ECU to perform a deceleration control of the vehicle so that (i) the longer the determined distance, the greater the deceleration rate applied during the deceleration control, and (ii) the deceleration is complete by the time the vehicle reaches the acquired deceleration end point.

2. The deceleration setting system according to claim 1, wherein, when the deceleration control program is executed, the processor cancels the deceleration control when the predicted distance over which traffic is present is equal to or greater than a predetermined threshold distance.

3. The deceleration setting system according to claim 1, wherein, when the deceleration control program is executed, the processor sets the deceleration control so that the deceleration is complete when a predetermined target speed of the vehicle is achieved at the acquired deceleration end point.

4. The deceleration setting system according to claim 1, wherein, when the deceleration control program is executed, the processor:

determines whether the predicted distance over which traffic is present is within a first predetermined distance range or a second predetermined distance range, each distance falling within the first predetermined distance range being shorter than each distance falling within the second predetermined distance range;

when the predicted distance over which traffic is present is within the first predetermined distance range, performs the deceleration control of the vehicle so that a first predetermined deceleration rate is applied during the deceleration control; and

when the predicted distance over which traffic is present is within the second predetermined distance range, performs the deceleration control of the vehicle so that a second predetermined deceleration rate is applied during the deceleration control, the second predetermined deceleration being greater than the first predetermined deceleration rate.

5. The deceleration setting system according to claim 1, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point; and

when the deceleration control program is executed, the processor selects the one of the plurality of deceleration end points associated with the acquired target deceleration point that is closest to the acquired target deceleration point as the acquired deceleration end point.

6. The deceleration setting system according to claim 1, wherein the learning information is stored in the memory.

7. The deceleration setting system according to claim 1, wherein the learning information is stored on a remote server.

8. The deceleration setting system according to claim 1, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point, each one of the plurality of deceleration end points associated with the acquired target deceleration point being associated with at least one of a particular day of the week and a particular time of the day; and

when the deceleration control program is executed, the processor selects one of the plurality of deceleration end points associated with the acquired target deceleration point as the acquired deceleration end point based on the associated at least one of a particular day of the week and a particular time of the day.

9. A deceleration setting method for a vehicle, the system comprising:

accessing, with a processor;

map information describing a map; and

learning information, the learning information including target deceleration points associated with deceleration end points, each target deceleration point being a point on a road where deceleration of the vehicle must be completed, and each deceleration end point being a point representative of one or more locations at which deceleration of the vehicle or another vehicle was actually completed in the past as the vehicle or the other vehicle approached the associated deceleration end point;

acquiring from the learning information, with the processor, a target deceleration point in the direction of travel of the vehicle and the deceleration end point associated with the acquired target deceleration point;

based on the map information, determining, with the processor, a distance between the acquired target deceleration point and the acquired deceleration end point;

predicting, with the processor, that the determined distance is a distance over which traffic is present prior to the target deceleration point in the direction of travel of the vehicle; and

causing the processor to communicate with a vehicle ECU to perform a deceleration control of the vehicle so that (i) the longer the determined distance, the greater the deceleration rate applied during the deceleration control, and (ii) the deceleration is complete by the time the vehicle reaches the acquired deceleration end point.

10. The deceleration setting method according to claim 9, further comprising canceling, with the processor, the deceleration control when the predicted distance over which traffic is present is equal to or greater than a predetermined threshold distance.

11. The deceleration setting method according to claim 9, further comprising setting, with the processor, the deceleration control so that the deceleration is complete when a predetermined target speed of the vehicle is achieved at the acquired deceleration end point.

12. The deceleration setting method according to claim 9, further comprising:

determining, with the processor, whether the predicted distance over which traffic is present is within a first predetermined distance range or a second predetermined distance range, each distance falling within the first predetermined distance range being shorter than each distance falling within the second predetermined distance range;

when the predicted distance over which traffic is present is within the first predetermined distance range, performing, with the processor, the deceleration control of the vehicle so that a first predetermined deceleration rate is applied during the deceleration control; and

when the predicted distance over which traffic is present is within the second predetermined distance range, performing, with the processor, the deceleration control of the vehicle so that a second predetermined deceleration rate is applied during the deceleration control, the second predetermined deceleration being greater than the first predetermined deceleration rate.

13. The deceleration setting method according to claim 9, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point; and

the method further comprises selecting, with the processor, the one of the plurality of deceleration end points associated with the acquired target deceleration point that is closest to the acquired target deceleration point as the acquired deceleration end point.

14. The deceleration setting method according to claim 9, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point, each one of the plurality of deceleration end points associated with the acquired target deceleration point being associated with at least one of a particular day of the week and a particular time of the day; and

the method further comprises selecting, with the processor, one of the plurality of deceleration end points associated with the acquired target deceleration point as the acquired deceleration end point based on the associated at least one of a particular day of the week and a particular time of the day.

15. A computer-readable storage medium storing a computer-executable deceleration setting program for a vehicle, the program comprising:

instructions causing a processor to access;

map information describing a map; and

learning information, the learning information including target deceleration points associated with deceleration end points, each target deceleration point being a point on a road where deceleration of the vehicle must be completed, and each deceleration end point being a point representative of one or more locations at which deceleration of the vehicle or another vehicle was actually completed in the past as the vehicle or the other vehicle approached the associated deceleration end point;

instructions causing the processor to acquire from the learning information a target deceleration point in the direction of travel of the vehicle and the deceleration end point associated with the acquired target deceleration point;

instructions causing the processor to, based on the map information, determine a distance between the acquired target deceleration point and the acquired deceleration end point;

instructions causing the processor to predict that the determined distance is a distance over which traffic is present prior to the target deceleration point in the direction of travel of the vehicle; and

instructions causing the processor to communicate with a vehicle ECU to perform a deceleration control of the vehicle so that (i) the longer the determined distance, the greater the deceleration rate applied during the deceleration control, and (ii) the deceleration is complete by the time the vehicle reaches the acquired deceleration end point.

16. The computer-readable storage medium according to claim 15, the program further comprising instructions causing the processor to cancel the deceleration control when the predicted distance over which traffic is present is equal to or greater than a predetermined threshold distance.

17. The computer-readable storage medium according to claim 15, the program further comprising instructions causing the processor to set the deceleration control so that the deceleration is complete when a predetermined target speed of the vehicle is achieved at the acquired deceleration end point.

18. The computer-readable storage medium according to claim 15, the program further comprising:

instructions causing the processor to determine whether the predicted distance over which traffic is present is within a first predetermined distance range or a second predetermined distance range, each distance falling within the first predetermined distance range being shorter than each distance falling within the second predetermined distance range;

instructions causing the processor to, when the predicted distance over which traffic is present is within the first predetermined distance range, perform the deceleration control of the vehicle so that a first predetermined deceleration rate is applied during the deceleration control; and

instructions causing the processor to, when the predicted distance over which traffic is present is within the second predetermined distance range, perform the deceleration control of the vehicle so that a second predetermined deceleration rate is applied during the deceleration control, the second predetermined deceleration being greater than the first predetermined deceleration rate.

19. The computer-readable storage medium according to claim 15, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point; and

the program further comprises instructions causing the processor to select the one of the plurality of deceleration end points associated with the acquired target deceleration point that is closest to the acquired target deceleration point as the acquired deceleration end point.

20. The computer-readable storage medium according to claim 15, wherein:

the learning information includes a plurality of deceleration end points associated with the acquired target deceleration point, each one of the plurality of deceleration end points associated with the acquired target deceleration point being associated with at least one of a particular day of the week and a particular time of the day; and

the program further comprises instructions causing the processor to select one of the plurality of deceleration end points associated with the acquired target deceleration point as the acquired deceleration end point based on the associated at least one of a particular day of the week and a particular time of the day.