Tire pressure monitoring system and method therefor

• US 20060232390A1
• Filed: 04/19/2005
• Published: 10/19/2006
• Est. Priority Date: 04/19/2005
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Bartnick, Brian K., Knoll, Richard J., Hall, Wallace T.
• Granted Patent: US 7,323,975 B2
• Time in Patent Office: Days
• US Class Current: 340/442
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver

Abstract

A tire pressure monitoring system for a vehicle with at least one tire includes at least one pressure sensor adapted for sensing pressure inside the at least one tire. The system also includes at least one indicator adapted to communicate a stop signal indicating that pressure inside the at least one tire is equal to a target pressure. The indicator is also adapted to communicate a continue signal indicating that pressure inside the at least one tire is unequal to a target pressure. The continue signal is adapted to indicate how close the pressure inside the at least one tire is to the target pressure. The tire pressure monitoring system further includes a controller in communication with the at least one pressure sensor and the at least one indicator. The controller is adapted to determine the target pressure according to a predicted operating condition of the at least one tire.

Claims

1. A tire pressure monitoring system for a vehicle with at least one tire comprising:

at least one pressure sensor adapted for sensing pressure inside the at least one tire;

at least one indicator adapted to communicate a stop signal indicating that pressure inside the at least one tire is equal to a target pressure; and

a controller in communication with said at least one pressure sensor and said at least one indicator, said controller being adapted to determine the target pressure according to a predicted operating condition of the at least one tire.

2. A tire pressure monitoring system as set forth in claim 1 including a temperature sensor communicating with said controller to detect an ambient temperature.

3. A tire pressure monitoring system as set forth in claim 1 including a location sensor communicating with said controller to detect a location of the at least one tire.

4. A tire pressure monitoring system as set forth in claim 1 including a speed and distance measurement device communicating with said controller to detect a speed and a distance traveled by the at least one tire.

5. A tire pressure monitoring system as set forth in claim 1 wherein said controller includes a clock to determine a date and time.

6. A tire pressure monitoring system as set forth in claim 1 wherein said controller includes a database of historic temperature statistics.

7. A tire pressure monitoring system as set forth in claim 1 wherein said controller includes a timer to detect a time period during which the speed of the at least one tire is approximately zero.

8. A tire pressure monitoring system as set forth in claim 1 wherein said at least one indicator is one of a type chosen from a group comprising a visual indicator, an audible indicator, and a mechanical indicator.

9. A tire pressure monitoring system as set forth in claim 1 including a plurality of indicators to communicate a signal indicating the pressure inside the at least one tire.

10. A tire pressure monitoring system for a vehicle with at least one tire comprising:

at least one pressure sensor adapted for sensing pressure inside the at least one tire;

at least one indicator adapted to communicate a signal indicating that pressure inside the at least one tire is equal to a target pressure and adapted to communicate a signal indicating that pressure inside the at least one tire is unequal to a target pressure.

11. A tire pressure monitoring system as set forth in claim 10 wherein said at least one indicator is one of a type chosen from a group comprising a visual indicator, an audible indicator, and a mechanical indicator.

12. A tire pressure monitoring system as set forth in claim 10 wherein said at least one indicator is located on the vehicle near the at least one tire.

13. A tire pressure monitoring system as set forth in claim 10 including a controller in communication with said at least one pressure sensor and said at least one indicator, said controller being adapted to determine the target pressure according to a predicted operating condition of the at least one tire.

14. A method of monitoring pressure inside a tire of a vehicle, said method comprising the steps of:

triggering a pressure adjustment mode;

adjusting the pressure inside the tire; and

indicating that the pressure inside the tire is approaching a target pressure.

15. A method as set forth in claim 14 wherein said step of triggering comprises a trigger event chosen from a group comprising actuating a trigger manually, detecting a change to the pressure inside the tire indicative of a vehicle operator adjusting the pressure inside the tire, and sensing the vehicle has been placed in park.

16. A method as set forth in claim 14 wherein said step of indicating comprises communicating a signal to an area adjacent the tire.

17. A method as set forth in claim 14 wherein said step of indicating comprises communicating a repetitive continue signal that increases in frequency as pressure inside the tire approaches the target pressure.

18. A method as set forth in claim 14 including the step of determining the target pressure according to a predicted operating condition of the tire before the step of indicating.

19. A method as set forth in claim 18 wherein the predetermined operating condition is determined by comparing a current ambient temperature to a predicted ambient temperature.

20. A method as set forth in claim 18 wherein the predetermined operating condition is determined by measuring distance traveled by the tire after the tire has been stationary for more than a predetermined time.

21. A method of monitoring a pressure inside a tire of a vehicle, said method comprising the steps of:

determining a predicted operating condition of the tire;

determining a target pressure according to said predicted operating condition of the tire;

adjusting the pressure inside the tire; and

indicating that the pressure inside the tire is equal to said target pressure.

22. A method as set forth in claim 21 wherein said step of determining a predicted operating condition comprises comparing a current ambient temperature to a predicted ambient temperature.

23. A method as set forth in claim 21 wherein said step of determining a predicted operating condition comprises measuring distance traveled by the tire after the tire has been stationary for more than a predetermined time.

24. A method as set forth in claim 21 including the step of indicating that the tire pressure is approaching the target pressure before said step of indicating.

25. A method as set forth in claim 21 wherein said step of determining a predicted operating condition comprises communicating a repetitive continue signal that increases in frequency as pressure in the tire approaches said target pressure.