METHOD AND SYSTEM FOR ADDRESSING IMPROPER TOWING OF A VEHICLE

• US 20090319121A1
• Filed: 06/20/2008
• Published: 12/24/2009
• Est. Priority Date: 06/20/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: Chokelal, Raymond S.C., Ostan, Terry W., MacDonald, Charles G.
• Granted Patent: US 8,005,589 B2
• Time in Patent Office: Days
• US Class Current: 701/35
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence

Abstract

A method and system that can be used to address improper towing of a vehicle so that unnecessary damage to the vehicle can be detected, recorded, prevented, avoided, etc. According to an exemplary embodiment, the method uses a vehicle power signal and one or more wheel movement signal(s) to detect instances of improper towing and, if detected, initiates a remedial action. Remedial actions could include, for example, alerting the tow truck operator through a visual and/or audible alarm, sending a wireless warning message to a remote call center, and recording the relevant information for subsequent analysis. In one embodiment, the wheel movement signals are provided by tire pressure monitoring (TPM) sensors already located in the vehicle.

Claims

1. Method for addressing improper towing of a vehicle, comprising the steps of:

a) receiving a vehicle power signal that is representative of the power status of the vehicle;

b) receiving a wheel movement signal that is representative of movement in a wheel of the vehicle;

c) utilizing the vehicle power signal and the wheel movement signal to determine if the vehicle is being improperly towed; and

d) if the vehicle is being improperly towed, then responding with a remedial action.

2. The method of claim 1, wherein step (a) further comprises receiving the vehicle power signal from a body control module (BCM) over a vehicle communications network.

3. The method of claim 1, wherein step (b) further comprises receiving the wheel movement signal from a tire pressure monitoring (TPM) sensor located at the wheel of the vehicle.

4. The method of claim 3, wherein the wheel movement signal is sent from the TPM sensor located at the wheel of the vehicle to a remote function actuator (RFA) located elsewhere in the vehicle over a wireless link.

5. The method of claim 4, wherein the remote function actuator (RFA) wakes up a body control module (BCM) in response to receiving the wheel movement signal.

6. The method of claim 1, wherein step (b) further comprises receiving the wheel movement signal from a wheel speed sensor that is located near the wheel of the vehicle.

7. The method of claim 6, wherein wheel movement signal is sent from the wheel speed sensor located near the wheel of the vehicle to an electronic brake control module (EBCM), and the wheel speed sensor and the electronic brake control module (EBCM) are powered up following the occurrence of a wakeup event.

8. The method of claim 7, wherein the wakeup event includes at least one event selected from the list consisting of:

detecting a temporary accessory mode activation and detecting a diagnostic trouble code (DTC).

9. The method of claim 1, wherein step (b) further comprises receiving a wheel movement signal from each wheel of the vehicle, and step (c) further comprises utilizing the vehicle power signal and the wheel movement signals from each wheel of the vehicle to determine relative differences in rotational velocities and utilizing the relative differences in rotational velocities to determine if the vehicle is being improperly towed.

10. The method of claim 1, wherein step (d) further comprises responding with one or more remedial action(s) that includes activating an alarm that can be perceived by a tow truck operator.

11. The method of claim 1, wherein step (d) further comprises responding with one or more remedial action(s) that includes sending a warning message from a telematics unit to a remote facility over a wireless communications link.

12. The method of claim 1, wherein step (d) further comprises responding with one or more remedial action(s) that includes electronically storing the wheel movement signal(s) for subsequent analysis.

13. System for addressing improper towing of a vehicle, comprising:

a tire pressure monitoring (TPM) sensor that is coupled to a wheel of the vehicle and provides a wheel movement signal that is representative of movement of the wheel;

a first electronic module that receives the wheel movement signal from the TPM sensor and is usually powered up when the vehicle is in a power-mode off condition; and

a second electronic module that is coupled to the first electronic module and is usually powered down when the vehicle is in a power-mode off condition;

wherein during a power-mode off condition, movement of the wheel causes;

i) the TPM sensor to send the wheel movement signal to the first electronic module, ii) the first electronic module to wake up the second electronic module, iii) the second electronic module to utilize the wheel movement signal and the power-mode off condition to determine if the vehicle is being improperly towed, and iv) the second electronic module to initiate a remedial action if the vehicle is being improperly towed.

14. The system of claim 13, wherein the first electronic module is a remote function actuator (RFA) and the wheel movement signal is sent from the TPM sensor to the RFA over a wireless link.

15. The system of claim 13, wherein the second electronic module is a body control module (BCM).

16. The system of claim 13, further including a plurality of TPM sensors coupled to a plurality of wheels, wherein the second control module utilizes wheel movement signals from the plurality of TPM sensors to determine relative differences in rotational velocities of the plurality of wheels, and utilizes the relative differences in rotational velocities to determine if the vehicle is being improperly towed.

17. The system of claim 13, further including an alarm that can be perceived by a tow truck operator, wherein the remedial action includes activating the alarm.

18. The system of claim 13, further including a telematics unit, wherein the remedial action includes sending a warning message from the telematics unit to a remote facility over a wireless communications link.