Tire pressure management system valve integrity verification method

• US 20060007007A1
• Filed: 03/15/2005
• Published: 01/12/2006
• Est. Priority Date: 12/03/2001
• Status: Active Grant

• Current Assignee: Dana Heavy Vehicle Systems Group LLC (Dana, Inc.)
• Original Assignee: Dana Heavy Vehicle Systems Group LLC (Dana, Inc.)
• Inventors: Claussen, Stephen P., Stacer, Daryl J.
• Granted Patent: US 7,265,659 B2
• Time in Patent Office: Days
• US Class Current: 340/605
• CPC Class Codes: B60C 23/00318 on the wheels or the hubs
• CPC Class Codes: B60C 23/00354 Details of valves
• CPC Class Codes: B60C 23/00372 characterised by fluid diagrams
• CPC Class Codes: B60C 23/04 mounted on the wheel or tyre
• CPC Class Codes: Y10T 137/36 With pressure-responsive pressure-control means
• CPC Class Codes: Y10T 137/3631 Diaphragm, bellows or expansible tube

Abstract

A method of verifying the integrity of a valve in service in a tire pressure management system is disclosed. The method of verifying valve integrity of a valve interposed between a tire and conduit assemblies for conducting fluid to and/or from the tire in a tire maintenance system includes closing the valve for prohibiting fluid flow into the conduit assemblies in fluid communication with the valve and monitoring the pressure of fluid in the conduit assemblies in fluid communication with the valve for ascertaining a pressure increase therein.

Claims

1-12. -12. (canceled)

13. A method of verifying integrity of a valve disposed between a tire and a conduit conducting fluid to or from said tire in a tire pressure management system, comprising the steps of:

urging said valve to a closed position;

generating a fluid pressure signal indicative of fluid pressure in said conduit;

updating a counter when said fluid pressure signal meets a first predetermined condition indicative of an increase in fluid pressure in said conduit; and

initiating an alarm if a value of said counter meets a second predetermined condition.

14. The method of claim 13 wherein said valve is a check valve.

15. The method of claim 13 wherein said urging step includes the substep of venting said conduit.

16. The method of claim 15 wherein said substep of venting said conduit includes the substep of urging a pressure control valve in fluid communication with said conduit to a position in which said conduit is in fluid communication with atmosphere.

17. The method of claim 13 wherein said fluid pressure signal is generated by a sensor in fluid communication with said conduit.

18. The method of claim 13, further comprising the step of repeating said urging, generating and updating steps if said value of said counter fails to meet said second predetermined condition.

19. The method of claim 13 wherein said initiating step includes the substep of illuminating a lamp.

20. The method of claim 13 wherein said initiating step occurs within a predetermined time.

21. A tire pressure management system, comprising:

a conduit conducting fluid to and from a tire;

a valve disposed between said conduit and said tire;

a sensor in fluid communication with said conduit and generating a fluid pressure signal indicative of fluid pressure in said conduit;

an alarm; and

,

an electronic control unit configured to selectively urge said valve to a closed position, to update a counter when said fluid pressure signal meets a first predetermined condition indicative of an increase in fluid pressure in said conduit after urging said valve to a closed position, and to activate said alarm if a value of said counter meets a second predetermined condition.

22. The tire pressure management system of claim 21, further comprising:

a fluid tank; and

,

a first pressure control valve disposed between said fluid tank and said conduit.

23. The tire pressure management system of claim 22 wherein said pressure control valve is a solenoid valve.

24. The tire pressure management system of claim 22 wherein said electronic control unit is configured to control said first pressure control valve.

25. The tire pressure management system of claim 24 wherein said electronic control unit is configured to open said first pressure control valve if said fluid pressure does not meet a third predetermined condition relative to a target pressure.

26. The tire pressure management system of claim 22, further comprising a second pressure control valve disposed between said first pressure control valve and said conduit.

27. The tire pressure management system of claim 26 wherein said second pressure control valve is a solenoid valve.

28. The tire pressure management system of claim 26 wherein said electronic control unit is configured to control said second pressure control valve.

29. The tire pressure management system of claim 26 wherein said conduit is placed in fluid communication with atmosphere when said second pressure control valve assumes an open position.

30. The tire pressure management system of claim 21, further comprising a pressure control valve in fluid communication with said conduit wherein said conduit is placed in fluid communication with atmosphere when said pressure control valve assumes an open position.

31. The tire pressure management system of claim 30 wherein said pressure control valve is a solenoid valve.

32. The tire pressures management system of claim 30 wherein said electronic control unit is configured to control said pressure control valve.

33. The tire pressure management system of claim 21 wherein said electronic control unit is configured to determine whether said fluid pressure signal meets said first predetermined condition a predetermined period of time after urging said valve to a closed position.

34. The tire pressure management system of claim 21 wherein said valve is a check valve.

35. The tire pressure management system of claim 21 wherein said alarm comprises a lamp.