Arrangement and method for preventing false detection of electronic stability control primary circuit loss

• US 10,286,948 B2
• Filed: 12/13/2016
• Issued: 05/14/2019
• Est. Priority Date: 12/17/2015
• Status: Active Grant

• Current Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Original Assignee: Continental Automotive Systems, Inc. (Continental AG)
• Inventors: Yang, Ying, Ye, Bo, Schneider, Michael Gerhard, Schumann, Clinton
• Primary Examiner(s): Chen, Shelley
• Application Number:
  US15/377,548
• Publication Number:
  US 20170174256A1
• Time in Patent Office: 882 Days
• Field of Search: None
• CPC Class Codes: B60T 17/221 Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M
• CPC Class Codes: B60T 2270/403 Brake circuit failure
• CPC Class Codes: B60T 2270/413 Plausibility monitoring, cross check, redundancy
• CPC Class Codes: B60T 8/1755 Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02
• CPC Class Codes: B60T 8/885 using electrical circuitry
• CPC Class Codes: B62D 5/0481 monitoring the steering system, e.g. failures

Abstract

A method of detecting for primary circuit loss of an electronic stability control system for a vehicle comprises checking that a lateral acceleration sensor is installed and working properly, a yaw sensor is installed and working properly, and a steering wheel angle sensor is installed and working properly. An absolute value of the lateral acceleration sensor is compared with a first pre-defined threshold, an absolute value of the yaw sensor is compared with a second pre-defined threshold, and an absolute value of the steering wheel angle sensor is compared with a third pre-defined threshold. It is determined that primary circuit loss detection is not required when any of the three sensors are equal to and above the respective pre-defined thresholds and that primary circuit loss detection is required when all of the three sensors are below the respective pre-defined threshold.

Claims

1. A method of detecting for primary circuit loss of an electronic stability control system for a vehicle comprising:

checking that a lateral acceleration sensor is installed and working properly;

comparing an absolute value of the lateral acceleration sensor with a first pre-defined threshold;

checking that a yaw sensor is installed and working properly;

comparing an absolute value of the yaw sensor with a second pre-defined threshold;

checking that a steering wheel angle sensor is installed and working properly;

comparing an absolute value of the steering wheel angle sensor with a third pre-defined threshold;

determining that primary circuit loss detection is not required when any of the three sensors are equal to and above the respective pre-defined threshold; and

determining that primary circuit loss detection is required when all of the three sensors are below the respective pre-defined threshold.

2. The method of claim 1, further comprising selecting a wheel slip threshold for a main primary circuit loss detection algorithm when primary circuit loss detection is required.

3. The method of claim 1, further comprising starting a main primary circuit loss detection algorithm when primary circuit loss detection is required.

4. The method of claim 1, further comprising setting a degradation flag when any of the lateral acceleration sensor, the yaw sensor, and the steer wheel angle sensor are not working properly.

5. The method of claim 1, further comprising setting a degradation flag when all of the lateral acceleration sensor, the yaw sensor, and the steer wheel angle sensor are not working properly.

6. An electronic stability control system comprising:

a lateral acceleration sensor capable of measuring lateral acceleration of the vehicle;

a yaw sensor capable of measuring yaw of the vehicle;

a steering wheel angle sensor capable of measuring a steering angle of the vehicle;

an electronic control unit connected to the lateral acceleration sensor, yaw sensor, and steering wheel angle sensor, wherein the electronic control unit is configured with instructions for;

checking that the lateral acceleration sensor is installed and working properly;

comparing an absolute value of the lateral acceleration sensor with a first pre-defined threshold;

checking that the yaw sensor is installed and working properly;

comparing an absolute value of the yaw sensor with a second pre-defined threshold;

checking that the steering wheel angle sensor is installed and working properly;

comparing an absolute value of the steering wheel angle sensor with a third pre-defined threshold;

determining that primary circuit loss detection is not required when any of the three sensors are equal to and above the respective pre-defined threshold; and

determining that primary circuit loss detection is required when all of the three sensors are below the respective pre-defined threshold.

7. The electronic stability control system of claim 6, wherein the electronic control unit is further configured with instructions for:

selecting a wheel slip threshold for a main primary circuit loss detection algorithm when primary circuit loss detection is required.

8. The electronic stability control system of claim 6, wherein the electronic control unit is further configured with instructions for starting a main primary circuit loss detection algorithm when primary circuit loss detection is required.

9. The electronic stability control system of claim 6, wherein the electronic control unit is further configured with instructions for setting a degradation flag when any of the lateral acceleration sensor, the yaw sensor, and the steer wheel angle sensor are not working properly.

10. The electronic stability control system of claim 6, wherein the electronic control unit is further configured with instructions for setting a degradation flag when all of the lateral acceleration sensor, the yaw sensor, and the steer wheel angle sensor are not working properly.