DRIVING SUPPORT APPARATUS

• US 20140303868A1
• Filed: 11/14/2011
• Published: 10/09/2014
• Est. Priority Date: 11/14/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Otake, Hirotada
• Granted Patent: US 9,278,672 B2
• Time in Patent Office: Days
• US Class Current: 701/70
• CPC Class Codes: B60T 7/12 for automatic initiation; for initiation not subject to will of driver or passenger limiting speed of vehicles other than rail vehicles B60K31/00
• CPC Class Codes: B60W 30/181 Preparing for stopping
• CPC Class Codes: B60W 30/18109 Braking
• CPC Class Codes: B60W 30/18154 Approaching an intersection
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes

Abstract

A driving support apparatus is provided with a support control device configured to calculate, based on a remaining distance from a stop position at which a vehicle stops by stop indication of a first traffic signal located in a travel direction of the vehicle to a point of the first traffic signal, an estimated variation distance for a second traffic signal located in the travel direction of the vehicle after the first traffic signal, and create a target vehicle travel state obtained by changing timing to start stopping support at the second traffic signal based on the estimated variation distance; and a support device capable of outputting driving support information to support driving of the vehicle based on a target travel state quantity of the vehicle.

Claims

1. A driving support apparatus which supports driving of a vehicle, comprising:

a support control device configured to calculate, based on a remaining distance from a stop position at which the vehicle stops by stop indication of a first traffic signal located in a travel direction of the vehicle to a point of the first traffic signal, an estimated variation distance for a second traffic signal located in the travel direction of the vehicle after the first traffic signal, and create a target vehicle travel state obtained by changing timing to start stopping support at the second traffic signal based on the estimated variation distance; and

a support device capable of outputting driving support information to support the driving of the vehicle based on a target travel state quantity calculated by the support control device.

2. The driving support apparatus according to claim 1, wherein

the support control device determines a target stop position at which the vehicle stops by stop indication of the second traffic signal based on a difference between the estimated variation distance and a reference stop position of the second traffic signal, and create the target vehicle travel state based on the target stop position, thereby changing the timing to start the stopping support.

3. The driving support apparatus according to claim 1, wherein

the support control device corrects a target vehicle speed at the time braking by brake is started for the second traffic signal based on the estimated variation distance, and creates the target vehicle travel state based on the corrected target vehicle speed at the time the braking by brake is started, thereby changing the timing to start the stopping support.

4. The driving support apparatus according to claim 1, wherein

the support control device multiplies a forgetting coefficient by the remaining distance to calculate the estimated variation distance obtained by correcting the remaining distance.

5. The driving support apparatus according to claim 4, wherein

the forgetting coefficient is smaller, as an inter-traffic signal distance from the point of the first traffic signal to a point of the second traffic signal is longer.

6. The driving support apparatus according to claim 4, wherein

the support control device changes correlation between the forgetting coefficient and the inter-traffic signal distance for each traffic signal or period of time.

7. The driving support apparatus according to claim 6, wherein

the support control device determines a rate of decrease of the forgetting coefficient based on information indicating a change in value of the remaining distance accumulated for each of the traffic signal or the period of time.

8. The driving support apparatus according to claim 4, wherein

at the time the vehicle makes a lane change, the support control device changes the forgetting coefficient to a value smaller than a value of the forgetting coefficient before the lane change.

9. The driving support apparatus according to claim 4, wherein

at the time the vehicle turns right or left, the support control device changes the value of the forgetting coefficient to 0.

10. The driving support apparatus according to claim 1, wherein

the support device outputs the driving support information to support in encouraging recommended driving operation.

11. The driving support apparatus according to claim 10, wherein

the driving support information includes information to provide instruction to release acceleration request operation and braking request operation.

12. The driving support apparatus according to claim 10, wherein

the driving support information includes information to provide instruction to start the braking request operation.

13. The driving support apparatus according to claim 2, wherein

the support control device multiplies a forgetting coefficient by the remaining distance to calculate the estimated variation distance obtained by correcting the remaining distance.

14. The driving support apparatus according to claim 3, wherein

the support control device multiplies a forgetting coefficient by the remaining distance to calculate the estimated variation distance obtained by correcting the remaining distance.

15. The driving support apparatus according to claim 5, wherein

the support control device changes correlation between the forgetting coefficient and the inter-traffic signal distance for each traffic signal or period of time.

16. The driving support apparatus according to claim 5, wherein

at the time the vehicle makes a lane change, the support control device changes the forgetting coefficient to a value smaller than a value of the forgetting coefficient before the lane change.

17. The driving support apparatus according to claim 6, wherein

at the time the vehicle makes a lane change, the support control device changes the forgetting coefficient to a value smaller than a value of the forgetting coefficient before the lane change.

18. The driving support apparatus according to claim 7, wherein

at the time the vehicle makes a lane change, the support control device changes the forgetting coefficient to a value smaller than a value of the forgetting coefficient before the lane change.

19. The driving support apparatus according to claim 5, wherein

at the time the vehicle turns right or left, the support control device changes the value of the forgetting coefficient to 0.

20. The driving support apparatus according to claim 6, wherein

at the time the vehicle turns right or left, the support control device changes the value of the forgetting coefficient to 0.