Vehicle force imbalance detection

Patent metadata

Field	Value
Publication number	US-10801910-B2
Application number	US-201816043476-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Jul 24, 2018
Publication date	Oct 13, 2020
Grant date	Oct 13, 2020

Abstract

A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to identify a wheel having a force imbalance based on wheel speed data from each of a plurality of vehicle wheels, and to identify a wheel force imbalance fault when the force imbalance exceeds at least one of a distance threshold and a time threshold.

First claim

What is claimed is:

1. A system, comprising a computer including a processor and a memory, the memory storing instructions executable by the processor to:
determine that a distance traveled by a vehicle from a location indicating a start of a route exceeds a predetermined distance;
then, collect, from one or more wheel speed sensors in communication with the processor, wheel speed data from each of a plurality of wheels;
identify a wheel having a force imbalance based on the collected wheel speed data; and
identify a wheel force imbalance fault when a distance duration of the force imbalance exceeds a distance threshold or a time duration of the force imbalance exceeds a time threshold.

2. The system of claim 1 , wherein the instructions further include instructions to apply a tuned resonance filter to filter at least one of road noise and vibrations from road variation.

3. The system of claim 1 , wherein the instructions to identify the wheel further include instructions to identify a plurality of peaks of the wheel speed data.

4. The system of claim 1 , wherein the instructions to identify the wheel force imbalance fault further include instructions to determine at least one of the distance threshold and the time threshold based on a magnitude of the force imbalance.

5. The system of claim 1 , wherein the instructions to collect wheel speed data further include instructions to determine that a vehicle is moving straight and then and only then to start collecting the wheel speed data from the wheels of the vehicle.

6. The system of claim 5 , wherein the instructions to determine that the vehicle is moving straight further include instructions to determine, from the wheel speed data, a first wheel speed for a first front wheel and a second wheel speed for a second front wheel and to determine that the vehicle is moving straight when the first wheel speed is within a predetermined speed threshold of the second wheel speed.

7. The system of claim 1 , wherein the instructions to identify the wheel further include instructions to identify a sine wave indicating a variation of the wheel speed from the wheel speed data.

8. The system of claim 1 , wherein the instructions to identify the wheel force imbalance fault further include instructions to determine whether the wheels require immediate repair based on a magnitude of the force imbalance.

9. The system of claim 1 , wherein the instructions to identify the wheel force imbalance fault further include instructions to determine a magnitude of the force imbalance and then to identify the wheel force imbalance fault when the magnitude exceeds a magnitude threshold.

10. The system of claim 1 , wherein the instructions further include instructions to determine whether an identified second wheel has a second force imbalance and to identify a wheel force imbalance fault for the second wheel when the second force imbalance exceeds at least one of the distance threshold and the time threshold.

11. A method, comprising:
determining that a distance traveled by a vehicle from a location indicating a start of a route exceeds a predetermined distance;
then, collecting, from one or more wheel speed sensors, wheel speed data from each of a plurality of wheels;
identifying one of the wheels having a force imbalance based on the collected wheel speed data; and
identifying a wheel force imbalance fault when a distance duration of the force imbalance exceeds a distance threshold or a time duration of the force imbalance exceeds a time threshold.

12. The method of claim 11 , further comprising applying a tuned resonance filter to filter at least one of road noise and vibrations from road variation.

13. The method of claim 11 , further comprising determining at least one of the distance threshold and the time threshold based on a magnitude of the force imbalance.

14. The method of claim 11 , further comprising determining a magnitude of the force imbalance and then identifying the wheel force imbalance fault when the magnitude exceeds a magnitude threshold.

15. A system, comprising:
a plurality of vehicle wheels;
a respective wheel speed sensor for each vehicle wheel;
means for determining that a distance traveled by a vehicle from a location indicating a start of a route exceeds a predetermined distance;
means for collecting, from the wheel speed sensors, wheel speed data for each of a plurality of vehicle wheels;
means for identifying one of the wheels having a force imbalance based on the wheel speed data; and
means for identifying a wheel force imbalance fault when the force imbalance exceeds at least one of a distance threshold and a time threshold.

16. The system of claim 15 , further comprising means for applying a tuned resonance filter to filter at least one of road noise and vibrations from road variation.

17. The system of claim 15 , further comprising means for determining at least one of the distance threshold and the time threshold based on a magnitude of the force imbalance.

18. The system of claim 15 , further comprising means for determining whether the wheels require immediate repair based on a magnitude of the force imbalance.

19. The system of claim 15 , further comprising means for determining a magnitude of the force imbalance and then identifying the wheel force imbalance fault when the magnitude exceeds a magnitude threshold.

Assignees

• Ford Global Tech Llc

Inventors

• Raad Joseph M
• Slavin Daniel F
• Recker Darrel Alan
• TROST Kelly
• Landolsi Fakhreddine

Classifications

• B60C23/0408

  transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver · CPC title

• G01M1/28 Primary

  with special adaptations for determining imbalance of the body in situ, e.g. of vehicle wheels · CPC title

• B60C23/062

  Frequency spectrum analysis of wheel speed signals, e.g. using Fourier transformation · CPC title

• G01M17/013

  Wheels · CPC title