TRAVEL RESISTANCE ARITHMETIC DEVICE

• US 20160016564A1
• Filed: 04/02/2013
• Published: 01/21/2016
• Est. Priority Date: 04/02/2013
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: OTAKE, Hirotada, SAKAGUCHI, Eiji
• Granted Patent: US 9,771,054 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60T 2201/04 Hill descent control
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60T 8/245 Longitudinal vehicle inclination
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 40/076 Slope angle of the road
• CPC Class Codes: B60W 40/1005 Driving resistance
• CPC Class Codes: G01C 21/3697 Output of additional, non-guidance related information, e.g. low fuel level G01C21/3679 takes precedence
• CPC Class Codes: G08G 1/0112 from the vehicle, e.g. floating car data [FCD]
• CPC Class Codes: G08G 1/0129 for creating historical data or processing based on historical data
• CPC Class Codes: G08G 1/0141 for traffic information dissemination

Abstract

A driving assistance device 1 is provided with a gradient/road surface resistance estimating unit 24b which estimates gradient/road surface resistance (travel resistance) G which a vehicle 2 receives from a travel road and a database 11 which stores the gradient/road surface resistance in association with positional information as a stored value G_L. A gradient/road surface resistance correcting unit 24c of the driving assistance device 1 corrects a stored value G_L—i+1 of the gradient/road surface resistance stored in the database 11 in association with a correction target area (place i+1) on the travel road based on a ratio (G_i/G_L—i) between a stored value G_L—i of the gradient/road surface resistance stored in the database 11 in association with a predetermined area (place i) on the travel road through which the vehicle 2 has already passed and an estimated value G_i of the gradient/road surface resistance estimated by the gradient/road surface resistance estimating unit 24b in the place i (step S101) to output as a corrected value G_H—i+1 of the gradient/road surface resistance in the place i+1 while the vehicle 2 travels the travel road (step S102).

Claims

1. A travel resistance arithmetic device comprising:

a controller configured to estimate travel resistance which a vehicle receives from a travel road; and

a memory configured to store the travel resistance in association with positional information,

wherein the controller is configured to;

correct, based on difference between a stored value of the travel resistance stored in the memory in association with a predetermined area on the travel road through which the vehicle has already passed and an estimated value of the travel resistance estimated by the controller in the predetermined area, the stored value stored in the memory in association with a correction target area on the travel road and;

output the corrected stored value as the travel resistance in the correction target area while the vehicle travels the travel road.

2. The travel resistance arithmetic device according to claim 1, wherein the controller is configured to correct the stored value stored in the memory in association with the correction target area in further consideration of the difference between the stored value and the estimated value of the travel resistance in a past predetermined area through which the vehicle has passed before the predetermined area and output the corrected stored value as the travel resistance in the correction target area.

3. The travel resistance arithmetic device according to claim 1, wherein the controller is configured to change a process of correcting the stored value according to a degree of separation between the correction target area and a previous correction target area through which the vehicle has already passed.

4. The travel resistance arithmetic device according to claim 1, wherein the memory is configured to store the estimated value of the travel resistance estimated by the controller as the stored value.

5. The travel resistance arithmetic device according to claim 1,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

6. The travel resistance arithmetic device according to claim 2, wherein the controller is configured to change a process of correcting the stored value according to a degree of separation between the correction target area and a previous correction target area through which the vehicle has already passed.

7. The travel resistance arithmetic device according to claim 2, wherein the memory is configured to store the estimated value of the travel resistance estimated by the controller as the stored value.

8. The travel resistance arithmetic device according to claim 3, wherein the memory is configured to store the estimated value of the travel resistance estimated by the controller as the stored value.

9. The travel resistance arithmetic device according to claim 6, wherein the memory is configured to store the estimated value of the travel resistance estimated by the controller as the stored value.

10. The travel resistance arithmetic device according to claim 2,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

11. The travel resistance arithmetic device according to claim 3,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

12. The travel resistance arithmetic device according to claim 4,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

13. The travel resistance arithmetic device according to claim 6,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

14. The travel resistance arithmetic device according to claim 7,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

15. The travel resistance arithmetic device according to claim 8,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.

16. The travel resistance arithmetic device according to claim 9,

wherein the controller is configured to perform the correction based on difference between travel resistance information obtained by arbitrating travel resistance information based on a travel history of an own vehicle stored in the memory, geographical information stored in map information, and travel resistance information based on a travel history of another vehicle externally obtained, and the estimated value of the travel resistance estimated by the controller in the predetermined area.