Wheel balancer with pressure adjustment

• US 6,293,147 B1
• Filed: 12/23/1999
• Issued: 09/25/2001
• Est. Priority Date: 12/23/1999
• Status: Expired due to Term

• Current Assignee: Hunter Engineering Company
• Original Assignee: Hunter Engineering Company
• Inventors: Colarelli, Nicholas J. III, Douglas, Michael W., Parker, Paul Daniel
• Primary Examiner(s): MOLLER, RICHARD ALAN
• Application Number:
  US09/471,834
• Time in Patent Office: 642 Days
• Field of Search: 734/62, 734/87, 731/462, 731/463, 731/464, 731/465, 734/60, 340/442, 340/445, 340/447, 340/449, 340/614, 340/870.16, 340/870.17, 116/34.R, 700/275, 700/279
• US Class Current: 73/462
• CPC Class Codes: G01M 1/16 by oscillating or rotating the body to be tested

Abstract

A wheel balancing system for the reduction of vehicle wheel and pneumatic tire assembly vibrations with the capacity to determine and selectively adjust the pneumatic tire'"'"'s pressure simultaneously with wheel balancing. The balancing system includes a drive for rotating the tire and wheel assembly; a sensing system for the selective determination of vibration causation and correction information; a pneumatic system for the adjustment of the pneumatic tire'"'"'s pressure; a control system for instituting the determined vibration corrections and pressure adjustments; as well as a communication system for receiving, transmitting and presenting data or instructions. The sensing system is responsive to the wheel balancing systems operational status, the wheel and tire assembly'"'"'s operational status, wireless or network communications and input from the user. The control system includes automatic provisions for safety, convenience, time efficiency, balancing and pressure adjustment. The pneumatic system, under direction of the control system, institutes an automatic adjustment of the tire'"'"'s pressure; and the communication system includes notification and display provisions.

Claims

1. A wheel balancer comprising:

a shaft for receiving a wheel and tire assembly to be balanced;

a drive for rotating the wheel and tire assembly;

a sensor system operatively connected to the shaft for ascertaining imbalance information;

an analysis system responsive to the imbalance information from the sensor system for determining information to correct the ascertained imbalance;

said balancer further including a pressure sensor to read the pneumatic tire pressure of said wheel and tire assembly.

2. The wheel balancer of claim 1 wherein said balancer creates a record of the pneumatic tire pressure read from the pressure sensor.

3. The wheel balancer of claim 1 wherein the pressure sensor automatically senses the pneumatic tire pressure upon operative connection to a gas flow valve of the wheel and tire assembly.

4. The wheel balancer of claim 1 wherein the said wheel and tire assembly includes an onboard pressure sensor and transmitter and the said balancer pressure sensor receives the tire pressure information by wireless communication.

5. The wheel balancer of claim 1 wherein the balancer has a mode for determining balancing information and a mode for determining pressure information.

6. The wheel balancer of claim 5 wherein said pressure mode has a safety interlock for the prevention of onset of balancing mode.

7. The wheel balancer of claim 6 wherein said pressure mode has a safety interlock for the interruption of balancing operation upon the onset of pressure mode.

8. The wheel balancer of claim 6 wherein said pressure mode safety interlock is engaged selectively.

9. The wheel balancer of claim 8 wherein said pressure mode safety interlock is disengaged selectively.

10. The wheel balancer of claim 9 wherein said pressure mode safety interlock is disengaged by return of said gas flow valve connection to a home position.

11. The wheel balancer of claim 1 wherein said balancer is further provided with a desired tire pressure.

12. A wheel balancer as described in claim 11 wherein said balancer further includes a display for depicting the desired tire pressure.

13. A wheel balancer as described in claim 1 wherein said balancer further includes a display for depicting the pressure sensed in the wheel and tire assembly.

14. A wheel balancer as described in claim 13 wherein the display interactively operates for inputting and depicting the desired pressure and outputting and depicting both the sensed pressure and the tire pressure adjustment progress.

15. A wheel balancer and pneumatic system as described in claim 14 wherein the display device is a graphical display.

16. The wheel balancer of claim 11 wherein the desired tire pressure is manually inputted.

17. The wheel balancer of claim 16 wherein a graphical interface is utilized to manually input the desired pressure.

18. The wheel balancer of claim 11 wherein the balancer determines if the sensed tire pressure is within a reference amount of the desired tire pressure.

19. The wheel balancer of claim 11 wherein the balancer automatically determines if the sensed tire pressure is within a reference amount of the desired tire pressure upon receiving information of the tire'"'"'s pressure.

20. The wheel balancer of claim 18 wherein the balancer determines a pressure differential between the sensed tire pressure and the desired tire pressure, and wherein the balancer provides a first signal when said pressure differential is greater than the reference amount.

21. The wheel balancer of claim 18 wherein the balancer determines a pressure differential between the sensed tire pressure and the desired tire pressure, and wherein the balancer provides a second signal when said pressure differential is not greater than the reference amount.

22. The wheel balancer of claim 20 further including a pressure control system operatively connected to the pressure sensing and analysis systems, said pressure control system including a source of pressurized gas and a pressure line adapted for connection to a gas flow valve of the tire.

23. The wheel balancer of claim 18 wherein the balancer, in response to sensing a tire pressure differential greater than the reference amount, automatically adjusts the tire pressure to within the reference amount of the desired pressure.

24. The wheel balancer of claim 5 wherein the wheel balancer is further provided with a desired tire pressure, said balancer thereupon determines a pressure differential equal to the difference between the sensed tire pressure and the desired tire pressure, whereupon when said balancer determines the pressure differential is greater than a reference amount the balancer automatically enters the pressure mode.

25. A wheel balancer as described in claim 23 further including an information processor responsive to the desired tire pressure and the pressure sensed in the tire and wheel assembly.

26. A wheel balancer as described in claim 25 wherein said information processor automatically determines if the sensed tire pressure is within the reference amount of the desired pressure.

27. A wheel balancer as described in claim 26 wherein the processor automatically notifies the user when said processor determines a pressure difference between the desired pressure and the sensed tire pressure greater than the reference amount.

28. A wheel balancer as described in claim 27 wherein said information processor directs the operation of said a gas flow controller.

29. A wheel balancer as described in claim 28 wherein said processor automatically directs the gas flow controller to bring the difference between the tire and wheel assembly pressure and the desired pressure to within less than the reference amount.

30. A wheel balancer as described in claim 29 wherein the processor operates according to a stored program to execute the automatic direction of the control system to correct the tire pressure.

31. A wheel balancer and information processor as described in claim 25 wherein said processor is further responsive to a remote source of data.

32. A wheel balancer and information processor as described in claim 31 wherein said remote source of data includes tire and/or gas temperature.

33. A wheel balancer and information processor as described in claim 31 wherein said remote data source is onboard the tire and wheel assembly.

34. A wheel balancer and information processor as described in claim 25 wherein said processor creates a record of the tire pressure.

35. A wheel balancer and information processor as described in claim 34 wherein the processor transmits said pressure record to a remote unit.

36. A wheel balance and information processor as described in claim 34 wherein the processor directs the making of a printout of the pressure record.

37. A wheel balancer as described in claim 1 further including a load roller disposed to apply force to said wheel and tire assembly when the assembly is mounted on the shaft.

38. A wheel balancer as described in claim 1 wherein said wheel balancer further includes a device for mounting and dismounting tires from wheels.

39. The wheel balancer of claim 1 wherein the balancer can further sense the ambient temperature and the tire'"'"'s internal temperature.

40. A wheel balancer as described in claim 39 further comprising a pressure control system which can sense the ambient temperature and the tire'"'"'s internal temperature upon connection of a pressure line to a gas flow valve of the tire and provide an information processor with these temperatures;

said processor utilizing the sensed temperature information and a provided reference temperature for a target pressure to adapt the target pressure to account for differences between the reference temperature, the internal tire temperature and the ambient temperature thereby allowing immediate pressure adjustment when the internal temperature differs from the reference temperature.

41. A method for adjusting a pneumatic tire'"'"'s pressure in connection with a wheel balancer for balancing a wheel and tire assembly comprising:

attaching to the pneumatic tire'"'"'s inflation valve a gas pressurization control system component of the wheel balancer;

inputting to said pressure control system a target pressure for the tire;

determining an initial pressure of the tire and automatically determining if the initial pressure is within a reference amount of the target pressure.

42. The method as set forth in claim 41 wherein a display is utilized to depict the target pressure and the initial pressure of the tire.

43. The method as set forth in claim 42 wherein the display is a graphic display.

44. The method as set forth in claim 41 further including notifying the user when the tire pressure differs from the target pressure by more than the reference amount.

45. The method as set forth in claim 41 further including notifying the user when the tire pressure differs from the target pressure by less than the reference amount.

46. The method as set forth in claim 41 further including directing the control system to institute the required correction to the tire pressure to bring the tire pressure within the reference amount of the target pressure.

47. The method as set forth in claim 41 further including the preliminary steps of utilizing a tire changing device for mounting a pneumatic tire on a wheel assembly and removing the wheel assembly with mounted pneumatic tire from the tire changing device before attaching the gas pressurization control system component to the pneumatic tire'"'"'s inflation valve.

48. The method as set forth in claim 46 wherein an information processor operating under a stored program executes the automatic direction of the control system to correct the tire pressure.

49. The method as set forth in claim 41 wherein the user provides the target pressure.

50. The method as set forth in claim 41 wherein a remote data source provides the target pressure.

51. The method as set forth in claim 41 further including making a record of the tire pressure data.

52. The method as set forth in claim 51 further including creating a printout of said tire pressure data record.

53. The method as set forth in claim 51 further including transmitting said tire pressure data record to a remote unit.

54. The method as set forth in claim 47 further including providing an information processor with an ambient temperature, an internal temperature of the tire and a reference temperature for the target pressure upon connection of the pressure line to the tire'"'"'s gas flow valve;

said information processor utilizing the temperature information to adapt the target pressure to account for differences between the reference temperature, the internal tire temperature and the ambient temperature prior to executing automatic direction of the control system to correct the tire pressure thereby allowing pressure adjustment when the internal temperature differs from the reference temperature.

55. A wheel balancer comprising:

a shaft for receiving a wheel and pneumatic tire assembly to be balanced;

a drive for rotating the shaft to thereby rotate the wheel and tire assembly;

a sensor system operatively connected to the shaft for ascertaining imbalance information;

said wheel and tire assembly including an onboard device for registering information of at least one operating parameter, including the pneumatic tire pressure, and said wheel and tire assembly including a wireless transmitter for sending the operating parameter information;

a wheel balancer analysis system, responsive to the imbalance information from the sensor system, for determining information to correct the ascertained imbalance;

said wheel balancer analysis system receiving additional information from the onboard device for registering operating parameters including data reflective of the tire'"'"'s actual pneumatic pressure.

56. The wheel balancer of claim 55 wherein the wheel balancer analysis system is responsive to operating parameter information from said wheel and tire onboard device including data reflective of the tire'"'"'s internal temperature.

57. The wheel balancer of claim 55 wherein said balancer registers the operating parameter information from said wheel and tire onboard device, wherein the operating parameter information includes a data set recorded by said wheel and tire onboard device.

58. The wheel balancer of claim 55 wherein the balancer operates in a balance mode for the analysis of vehicle and wheel assembly imbalance information and in an additional pressure mode for the analysis of tire pressurization information.

59. The wheel balancer of claim 58 wherein the pressure mode is responsive to the onboard operating parameters data relay device'"'"'s communication to determine a pressure differential function from the tire'"'"'s actual pressure and the tire'"'"'s optimal pressure.

60. The wheel balancer of claim 59 wherein the analysis system in either mode automatically communicates to user that the actual tire pressure is not optimal upon determining the actual pressure differs from the optimal pressure by more than a reference amount.

61. The wheel balancer of claim 60 wherein the analysis system automatically switches to the pressure mode upon determining that the actual tire pressure differs from the optimal pressure by more than the reference amount.

62. A wheel balancer comprising:

a shaft for receiving a pneumatic tire and wheel assembly to be balanced;

a drive for rotating the shaft to thereby rotate the tire and wheel assembly;

a sensor system operatively connected to the shaft for ascertaining imbalance information;

an analysis system responsive to the imbalance information from the sensor system for determining information to correct the ascertained imbalance;

a gas flow control system including a pressure sensor, a pressure source, controllers for the governing of gas flow through the control system and an operative connection for attachment to the inflation valve of an pneumatic tire;

said analysis system including at least one information processor in operational direction of the gas flow system controllers;

at least one said processor operating under at least one stored program to direct the gas flow system to adjust the pneumatic tire'"'"'s pressure to within less than a reference amount of a target pressure upon operative connection to the inflation valve of the pneumatic tire.

63. The wheel balancer of claim 62 wherein said pressure adjustment occurs automatically upon attachment of the operative connection to the tire inflation valve.

64. The wheel balancer of claim 62 wherein wheel balancing operation is prevented until the tire pressure has been measured.

65. A method for adjusting a pneumatic tire'"'"'s pressure in connection with a wheel balancer for balancing a wheel and tire assembly comprising:

providing a gas pressurization control system component of the wheel balancer;

determining a measured pressure of the tire and a target pressure for the tire;

said gas pressurization control system further determining if the measured pressure of the tire is within a reference amount of the target pressure.

66. The method as set forth in claim 65 wherein said gas pressurization control system automatically determines if the measured pressure of the tire is within a reference amount of the target pressure upon attaching a connection component of the gas control system to the tire'"'"'s inflation valve.