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

Patent metadata

Field	Value
Publication number	US-10286948-B2
Application number	US-201615377548-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 17, 2015
Publication date	May 14, 2019
Grant date	May 14, 2019

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.

First claim

What is claimed is:

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.

Assignees

• Continental automotive systems inc

Inventors

• Yang Ying
• Ye Bo
• Schneider Michael Gerhard
• Schumann Clinton

Classifications

• B60T8/1755 Primary

  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 title

• B62D5/0481 Primary

  monitoring the steering system, e.g. failures · CPC title

• B60T2270/403

  Brake circuit failure · CPC title

• B60T17/221

  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 title

• B60T2270/413

  Plausibility monitoring, cross check, redundancy · CPC title