METHOD AND SYSTEM FOR RESETTING TIRE PRESSURE MONITORING SYSTEM FOR AN AUTOMOTIVE VEHICLE

• US 20060139158A1
• Filed: 12/15/2004
• Published: 06/29/2006
• Est. Priority Date: 12/15/2004
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Miller, Thomas, McQuade, Thomas, Mince, Robert
• Granted Patent: US 7,224,269 B2
• Time in Patent Office: Days
• US Class Current: 340/445
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60C 23/0418 Sharing hardware components like housing, antenna, receiver or signal transmission line with other vehicle systems like keyless entry or brake control units
• CPC Class Codes: B60C 23/0462 Structure of transmission protocol
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 5/085 using electronic data carriers
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks

Abstract

A tire pressure monitoring system (12) for a vehicle (10) includes a vehicle speed sensor (38, 98) that is used to generate a vehicle speed signal. A receiver (28) operates using a first protocol when the vehicle speed signal is below a first speed threshold and operates using a second protocol when the vehicle speed is above the speed threshold. A remote keyless entry system (23) is coupled to the receiver and operates when the vehicle speed is below a speed threshold. The remote keyless entry system (23) receives signals from a keyless entry transmitter (60) using the first protocol. A tire pressure monitoring system (12) has a pressure transmitter (16A-16E) that generates a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed signal is above the speed threshold.

Claims

1. A method comprising:

determining a vehicle speed;

when the vehicle speed is below a speed threshold, generating a first preamble signal and a first data signal using a first protocol from a tire pressure sensor;

when the vehicle is below the speed threshold, operating a receiver using the first protocol; and

when the vehicle is above the speed threshold, operating the receiver using the second protocol.

2. A method as recited in claim 1 wherein generating a first preamble signal and a first data signal using a first protocol from a tire pressure sensor comprises generating the first preamble signal and the first data signal using the first protocol, and a second preamble signal and a second data signal using a second protocol from the tire pressure sensor.

3. A method as recited in claim 1 further comprising when the vehicle speed is below a speed threshold, operating a vehicle system using the first protocol.

4. A method as recited in claim 3 further comprising when the vehicle is above the speed threshold, disabling the vehicle system.

5. A method as recited in claim 4 wherein the vehicle system comprises a remote keyless entry system.

6. A method as recited in claim 1 wherein the first protocol comprises amplitude shift key.

7. A method as recited in claim 1 wherein the second protocol comprises frequency shift key.

8. A method as recited in claim 1 wherein the vehicle speed threshold is about 20 miles per hour.

9. A method as recited in claim 1 wherein determining vehicle speed comprises determining vehicle speed from a speed detector circuit of a pressure transmitter circuit and a vehicle speed sensor.

10. A system comprising:

a vehicle speed sensor generating a vehicle speed signal;

a receiver operating using a first protocol when the vehicle speed signal is below a speed threshold and operating using a second protocol when the vehicle speed signal is above the speed threshold;

a remote keyless entry system coupled to the receiver operating when the speed signal is below a speed threshold, said remote keyless entry system receiving signals from a keyless entry transmitter using the first protocol; and

a tire pressure monitoring system coupled to the receiver, said tire pressure monitoring system having a pressure transmitter generating a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed is above the speed threshold.

11. A system as recited in claim 10 wherein the first protocol comprises amplitude shift key.

12. A system as recited in claim 10 wherein the second protocol comprises frequency shift key.

13. A system as recited in claim 10 wherein when the vehicle speed is above a speed threshold, disabling the remote keyless entry system.

14. A system as recited in claim 10 wherein the speed sensor comprises a speed detector in a pressure transmitter.

15. A system as recited in claim 10 wherein the speed sensor comprises a vehicle speed sensor.

16. A system as recited in claim 10 wherein the speed sensor comprises a speed detector in a pressure transmitter and a vehicle speed sensor.

17. A method comprising:

determining a vehicle speed;

when the vehicle speed is below a speed threshold, operating a remote keyless entry system using the first protocol;

when the vehicle speed is below a speed threshold, generating a first preamble signal and a first data signal using a first protocol, a second preamble signal and a second data signal using a second protocol from a tire pressure sensor;

when the vehicle is below the speed threshold, operating a receiver using the first protocol;

when the vehicle is above the speed threshold, disabling the remote keyless entry system; and

when the vehicle is above the speed threshold, operating the receiver using the second protocol.

18. A method as recited in claim 17 wherein the first protocol comprises amplitude shift key.

19. A method as recited in claim 17 wherein the second protocol comprises frequency shift key.

20. A method as recited in claim 17 wherein determining vehicle speed comprises determining vehicle speed from a speed detector circuit of a pressure transmitter circuit and a vehicle speed sensor.