Autonomous control for vehicle pedal mis-apply situations

• US 8,255,121 B2
• Filed: 07/07/2009
• Issued: 08/28/2012
• Est. Priority Date: 07/07/2009
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Zagorski, Chad T., Chatterjee, Aamrapali, Cutler, Daniel B.
• Primary Examiner(s): Zanelli, Michael J.
• Application Number:
  US12/498,929
• Publication Number:
  US 20110010034A1
• Time in Patent Office: 1,148 Days
• Field of Search: None
• US Class Current: 701/45
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/103 Accelerator thresholds, e.g. kickdown
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 50/10 Interpretation of driver requests or demands
• CPC Class Codes: B60W 50/12 Limiting control by the driver depending on vehicle state, e.g. interlocking means for the control input for preventing unsafe operation

Abstract

A method is provided for detecting a likely pedal misapplication event and mitigating the effects of a pedal misapplication. In one embodiment the method comprises determining if likely pedal misapplication has occurred by the steps of: determining if a gear shift has occurred within a threshold time; determining if a vehicle velocity is below a threshold velocity; determining if the accelerator pedal is above a threshold application level; determining if the brake pedal is being applied by the driver; and determining if an obstacle is in the vehicle path and within a threshold distance. If these criteria are found, a likely pedal misapplication is detected.

Claims

1. A method for determining pedal misapplication in a vehicle, the method comprising the steps of:

determining if a first pedal is applied above a first threshold level;

determining if a second pedal is applied below a second threshold level;

determining if an obstacle is within a path of the vehicle and within a threshold distance; and

determining if pedal misapplication has likely occurred based at least in part on the determining if the first pedal is applied above the first threshold level, the determining if the second pedal is applied below the second threshold level, and the determining if the obstacle is within the path of the vehicle and within the threshold distance.

2. The method of claim 1, further comprising the step of:

determining if a gear shift occurred within a threshold period of time.

3. The method of claim 1, further comprising the step of:

determining if a vehicle velocity is below a threshold velocity.

4. The method of claim 1, wherein the first pedal is an accelerator pedal, and wherein the second pedal is a brake pedal.

5. The method of claim 1, further comprising the step of:

engaging wrong pedal mitigation in response to a determined pedal misapplication.

6. The method of claim 5, wherein the step of engaging wrong pedal mitigation in response to the determined pedal misapplication comprises:

engaging autonomous braking in the vehicle.

7. The method of claim 5, wherein the step of engaging wrong pedal mitigation in response to the determined pedal misapplication comprises:

idling a torque request to the vehicle.

8. The method of claim 1, wherein the step of determining if the obstacle is within the path of the vehicle and within the threshold distance comprises:

using an ultrasonic sensor.

9. The method of claim 1, wherein the step of determining if the obstacle is within the path of the vehicle and within the threshold distance comprises:

using a sensor selected from a group consisting of an ultrasonic sensor, a radar sensor, a lidar sensor and a vision sensor.

10. A method for selectively mitigating pedal misapplication in a vehicle, the method comprising the steps of:

A) determining if pedal misapplication is occurring by;

determining if a gear shift occurred within a threshold period of time;

determining if a vehicle velocity is below a threshold velocity;

determining if an accelerator pedal is applied at a level above a first threshold;

determining if a brake pedal is being applied; and

determining if an obstacle is within a path of the vehicle and within a threshold distance;

B) applying wrong pedal mitigation if pedal misapplication is determined to be occurring.

11. The method of claim 10, wherein the step of applying wrong pedal mitigation if pedal misapplication is determined to be occurring comprises:

engaging autonomous braking in the vehicle.

12. The method of claim 10, wherein the step of applying wrong pedal mitigation if pedal misapplication is determined to be occurring comprises:

idling a torque request to the vehicle.

13. The method of claim 10, wherein the step of determining if the obstacle is within the path of the vehicle and within the threshold distance comprises:

using an ultrasonic sensor.

14. A system for selectively mitigating pedal misapplication in a vehicle, the system comprising:

an accelerator pedal detector configured to detect a position of an accelerator pedal;

a brake pedal detector configured to detect a position of a brake pedal;

an obstacle detector configured to detect objects in a vehicle path; and

a processor coupled to the accelerator pedal detector, the brake pedal detector, and the obstacle detector, the processor configured to;

A) determine if pedal misapplication is occurring by;

determining if the position of the accelerator pedal is above a first threshold;

determining if the position of the brake pedal is below a second threshold; and

determining if an obstacle is within a path of the vehicle and within a threshold distance; and

B) apply wrong pedal mitigation if pedal misapplication is determined to be occurring.

15. The system of claim 14, wherein the system further comprises a gear shift detector coupled to the processor, and wherein the processor is further configured to determine if pedal misapplication is occurring by:

determining if a gear shift occurred within a threshold period of time.

16. The system of claim 14, wherein the system further comprises a velocity detector coupled to the processor, and wherein the processor is further configured to determine if pedal misapplication is occurring by:

determining if a vehicle velocity is below a threshold velocity.

17. The system of claim 14, wherein the processor is configured to apply wrong pedal mitigation if pedal misapplication is determined to be occurring by:

engaging autonomous braking in the vehicle.

18. The system of claim 14, wherein the processor is configured to apply wrong pedal mitigation if pedal misapplication is determined to be occurring by:

idling a torque request to the vehicle.