VEHICLE CONTROL SYSTEM

• US 20140207334A1
• Filed: 07/20/2011
• Published: 07/24/2014
• Est. Priority Date: 07/20/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Yoshimitsu Agata
• Inventors: Itabashi, Kaiji, Tanahashi, Toshio, Takeuchi, Keisuke, Agata, Yoshimitsu, Kawasaki, Tomohide, Noumura, Shin
• Granted Patent: US 9,002,578 B2
• Time in Patent Office: Days
• US Class Current: 701/37
• CPC Class Codes: B60W 10/00 Conjoint control of vehicle sub-units of different type or different function for propulsion of purely electrically-propelled vehicles with power supplied within the vehicle B60L50/00 - B60L58/00
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 10/20 including control of steering systems
• CPC Class Codes: B60W 10/22 including control of suspension systems
• CPC Class Codes: B60W 2050/0022 Gains, weighting coefficients or weighting functions
• CPC Class Codes: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2520/125 Lateral acceleration
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: B60W 40/10 related to vehicle motion
• CPC Class Codes: B60W 50/082 Selecting or switching between different modes of propelling
• CPC Class Codes: F16H 2059/003 Detecting or using driving style of a driver, e.g. for adapting shift schedules
• CPC Class Codes: F16H 59/48 Inputs being a function of acceleration
• CPC Class Codes: F16H 61/10 Controlling shift hysteresis

Abstract

A vehicle control system configured to judge a vehicle behavior or a driving preference of a driver based on acceleration of the vehicle including at least longitudinal acceleration. An acceleration value used in the judgment is obtained on the basis of a weighted detection value of the actual longitudinal acceleration of the vehicle, and a weighted parameter which is varied by an operation to increase a driving force of the vehicle executed by the driver. A weight on the parameter is reduced in case a weight on the detection value of the longitudinal acceleration is increased, and the weight on the parameter is increased in case the weight on the detection value of the longitudinal acceleration is reduced.

Claims

1. A vehicle control system, which is configured to judge a vehicle behavior or a driving preference of a driver based on acceleration of the vehicle including at least longitudinal acceleration, charactcrizcd in that wherein:

an acceleration value used to judge the vehicle behavior or the driving preference is obtained on the basis of a weighted detection value of the actual longitudinal acceleration of the vehicle, and a weighted parameter which is varied by an operation to increase a driving force of the vehicle executed by the driver; and

a weight on the parameter is reduced in case a weight on the detection value of the longitudinal acceleration is increased, and the weight on the parameter is increased in case the weight on the detection value of the longitudinal acceleration is reduced.

3. The vehicle control system as claimed in claim 1, wherein:

the weight on the detection value of the longitudinal acceleration is increased under the situation in which the longitudinal acceleration is easy to be established; and

the weight on the parameter is increased under the situation in which the longitudinal acceleration is difficult to be established.

4. The vehicle control system as claimed in claim 3, wherein:

the situation in which the longitudinal acceleration is easy to be established includes a situation in which the vehicle is running at a low speed;

the situation in which the longitudinal acceleration is difficult to be established includes a situation in which the vehicle is running at a high speed;

the weight on the parameter is reduced and the weight on the detection value of the longitudinal acceleration is increased in case the vehicle is running at a low speed; and

the weight on the parameter is increased and the weight on the detection value of the longitudinal acceleration is reduced in case the vehicle is running at a high speed.

5. The vehicle control system as claimed in claim 1, wherein the parameter includes at least any one of:

(i) an opening rate of an accelerator;

(ii) a ratio of the detection value of the longitudinal acceleration to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is detected; and

(iii) a ratio of the longitudinal acceleration calculated on the basis of the opening degree of the accelerator to the maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated.

6. The vehicle control system as claimed in claim 1, wherein the parameter is normalized within a tire friction circle of the vehicle.

9. The vehicle control system as claimed in claim 3, wherein the parameter includes at least any one of:

(i) an opening rate of an accelerator;

(ii) a ratio of the detection value of the longitudinal acceleration to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is detected; and

(iii) a ratio of the longitudinal acceleration calculated on the basis of the opening degree of the accelerator to the maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated.

10. The vehicle control system as claimed in claim 4, wherein the parameter includes at least any one of:

(i) an opening rate of an accelerator;

(ii) a ratio of the detection value of the longitudinal acceleration to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is detected; and

(iii) a ratio of the longitudinal acceleration calculated on the basis of the opening degree of the accelerator to the maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated.

13. The vehicle control system as claimed in claim 3, wherein the parameter is normalized within a tire friction circle of the vehicle.

14. The vehicle control system as claimed in claim 4, wherein the parameter is normalized within a tire friction circle of the vehicle.

15. The vehicle control system as claimed in claim 5, wherein the parameter is normalized within a tire friction circle of the vehicle.

18. The vehicle control system as claimed in claim 9, wherein the parameter is normalized within a tire friction circle of the vehicle.

19. The vehicle control system as claimed in claim 10, wherein the parameter is normalized within a tire friction circle of the vehicle.

2. A vehicle control system, which is configured to control at least any one of characteristics of a speed change, a driving force, a steering and a suspension, on the basis of a detection value of longitudinal acceleration of a vehicle, and a parameter which is varied by an operation to increase the driving force of the vehicle executed by a driver, wherein:

the detection value and the parameter are weighted individually; and

a weight on the parameter is reduced in case a weight on the detection value of the longitudinal acceleration is increased, and the weight on the parameter is increased in case the weight on the detection value of the longitudinal acceleration is reduced.

7. The vehicle control system as claimed in claim 2, wherein:

the weight on the detection value of the longitudinal acceleration is increased under the situation in which the longitudinal acceleration is easy to be established; and

the weight on the parameter is increased under the situation in which the longitudinal acceleration is difficult to be established.

8. The vehicle control system as claimed in claim 2, wherein the parameter includes at least any one of:

(i) an opening rate of an accelerator;

(ii) a ratio of the detection value of the longitudinal acceleration to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is detected; and

(iii) a ratio of the longitudinal acceleration calculated on the basis of the opening degree of the accelerator to the maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated.

11. The vehicle control system as claimed in claim 7, wherein the parameter includes at least any one of:

(i) an opening rate of an accelerator;

(ii) a ratio of the detection value of the longitudinal acceleration to a maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is detected; and

(iii) a ratio of the longitudinal acceleration calculated on the basis of the opening degree of the accelerator to the maximum longitudinal acceleration possible to be established at a moment when the longitudinal acceleration is calculated.

12. The vehicle control system as claimed in claim 2, wherein the parameter is normalized within a tire friction circle of the vehicle.

16. The vehicle control system as claimed in claim 7, wherein the parameter is normalized within a tire friction circle of the vehicle.

17. The vehicle control system as claimed in claim 8, wherein the parameter is normalized within a tire friction circle of the vehicle.

20. The vehicle control system as claimed in claim 11, wherein the parameter is normalized within a tire friction circle of the vehicle.