Method for controlling an adjuster on a motor vehicle

• US 6,943,516 B2
• Filed: 12/02/2002
• Issued: 09/13/2005
• Est. Priority Date: 12/01/2001
• Status: Expired due to Fees

• Current Assignee: Brose Fahrzeugteile GmbH & Company KG Coburg
• Original Assignee: Brose Fahrzeugteile GmbH & Company KG Coburg
• Inventors: Steiner, Michael, Rösch, Thomas, Schiegel, Stefan, Fuchs, Thorsten, Carl, Ingo, Woller, Alexander
• Primary Examiner(s): Masih, Karen
• Application Number:
  US10/496,337
• Publication Number:
  US 20040257019A1
• Time in Patent Office: 1,016 Days
• Field of Search: 361/23, 318/466, 318/563, 318/565, 318/566, 318/467, 318/468, 318/469
• US Class Current: 318/466
• CPC Class Codes: B60N 2/0224 Non-manual adjustments, e.g. with electrical operation
• CPC Class Codes: B60N 2/0226 User interfaces specially adapted for seat adjustment
• CPC Class Codes: B60N 2/0244 with logic circuits
• CPC Class Codes: B60N 2/0272 using sensors or detectors for detecting the position of seat parts
• CPC Class Codes: B60N 2/0277 characterised by the calculation method or calculation flow chart of sensor data for adjusting the seat
• CPC Class Codes: B60N 2/06 slidable B60N2/12 , B60N2/2209 take precedence
• CPC Class Codes: B60N 2210/14 Inductive; Magnetic field
• CPC Class Codes: B60N 2220/20 using a deterministic algorithm

Abstract

A method for controlling a vehicle seat adjuster in an adjusting path having a first mechanical stop and a second mechanical stop. A user sets an adjustment position of the adjuster inside the adjusting path. A protective stop is also automatically set in the adjusting path in the vicinity of the mechanical stops or another mechanical block blocking the adjusting path. The protective stop causes the adjusting motion to be reduced or stopped upon reaching of the protective stop. This helps produce a smooth braking of the vehicle seat and reduces the mechanical strain on the mechanical stops. The protective stop may be corrected with an updated protective stop. The updated protective stop is maintained despite any user action if a condition dependent on the adjusting motion of the adjuster is fulfilled. Learning regions within the adjusting path are provided to allow the setting of updated protective stops within the learning regions.

Claims

1. A method for controlling an adjusting device in a motor vehicle having at least one adjusting path between a first mechanical stop and a second mechanical stop, the method comprising:

setting an adjustment position of the adjusting device inside the adjusting path responsive to a user action;

determining the set adjustment position inside the adjusting path;

setting a protective stop position in the adjusting path, the protective stop position triggering a reduction in adjusting energy for stopping an adjusting motion within a region of a mechanical block blocking the adjusting motion; and

correcting the protective stop position with an updated protective stop position which is maintained despite the user action responsive to a detecting of a condition associated with the adjusting motion of the adjusting device.

2. The method according to claim 1 further comprising:

inactivating the protective stop position via an evaluator logic evaluating individual adjusting results of the adjusting motion.

3. The method according to claim 2, wherein the inactivation of the protective stop position is undertaken based on the evaluation of a history of the individual adjusting results.

4. The method according to one of the preceding claims wherein the individual adjusting results of the adjusting motion include results which cause stopping of the adjusting motion.

5. The method according to claim 2, wherein the individual adjusting results of the adjusting motion include results associated with starting of the adjusting motion and change in the direction of the adjusting motion.

6. The method according to claim 1, wherein at least one of location, time, and number of individual adjusting results of the adjusting motion is the condition dependent on the adjusting motion.

7. The method according to claim 1 comprising:

determining a learning region associated with the protective stop position, the learning region including one or more range limits determined based on the protective stop position, wherein the correcting of the protective stop position with the updated protective stop position occurs based on a determination of whether the updated protective stop position or position associated with the mechanical stop lies within the range limits.

8. The method according to claim 7, wherein the determining of the learning region further includes:

determining existence of a block blocking the adjusting motion at one of the mechanical stops; and

calculating the range limits of the learning range based on the adjusting position, the adjusting position being associated with the block blocking the adjusting motion.

9. The method according to claim 8, wherein the range limits are calculated so that a blocking position of the block lies on or within the range limits.

10. The method according to one of claims 7 and 9 wherein a first learning range limit is associated with a first mechanical stop and a second learning range limit is associated with a second mechanical stop, and wherein a locking range is identified between the first learning range limit and the second learning range limit, wherein the setting of the updated protective stop position associated with one of the mechanical stops is prevented in the locking range.

11. The method according to claim 10, wherein at least one of the set protective stop positions is deactivated if a blocking of the adjusting motion is determined within the locking range.

12. The method according to claim 8, wherein the learning range limits and set protective stop positions are deactivated if the adjustment position is determined outside of the learning range limits and the locking range.

13. The method according to claim 10, wherein the distance between a first protective stop position associated with the first mechanical stop and a second protective stop position associated with the second mechanical stop is compared with a minimum distance, and at least one of the protective stop positions is changed if the distance between the first and second protective positions is equal to or less than the minimum distance.

14. The method according to claim 13, wherein both protective stop positions and the associated learning range limits are deactivated if the distance is equal to or less than the minimum distance.

15. The method according to claim 13, wherein the minimum distance is predetermined for the adjusting device and is retrieved for the comparison from a non-volatile memory.

16. The method according to claim 13, wherein the minimum distance is calculated from a measured maximum adjusting path.

17. The method according to claim 7, wherein the adjusting speed is reduced at least inside the learning range limits.

18. The method according to claim 7, wherein the protective stop positions and learning range limits are calculated in a computer unit and stored in a non-volatile memory.

19. The method according to claim 7, wherein based on a determination of a first protective stop position associated with the first mechanical stop, a second protective stop position is determined for the second mechanical stop.

20. The method according to claim 19, wherein the correcting of the protective stop position further comprises:

determining an error in the protective stop position;

determining a desired protective stop position;

correcting the protective stop position based on the desired protective stop position;

based on the corrected protective stop position, determining and correcting a second protective stop position assigned to the other mechanical stop.

21. The method according to claim 19, wherein the adjustment position is assigned to a position value which is changed based on the adjustment of the adjusting device, the position value being corrected if a shift in the position value relative to an actual adjustment position is determined, the correction including setting the actual adjustment position value changed in position relative to at least one protective stop position, to the actual adjustment position.

22. The method according to one of claims 19 and 21, wherein the actual adjustment position value is set to the actual adjustment position, the actual adjustment position value being changed relative to a first protective stop position and a second protective stop position which are dependent on each other.

23. The method according to claim 21, wherein the position value is a numerical value which is incremented or decremented in dependence on the drive motion of a drive of the adjuster.

24. The method according to claim 21, wherein the first protective stop position and the second protective stop position are stored as values which do not vary.

25. The method according to claim 21, wherein the correction of the position value is calculated based on an adjustment position associated with a block blocking the adjusting motion so that the first protective stop position is positioned in the region of the first mechanical stop and the second protective stop position is positioned in the region of the second mechanical stop.

26. The method according to claim 21, wherein at least one of the protective stop positions is deactivated if a shift of the position value in relation to the actual adjustment position in the adjusting path is determined.

27. The method according to claim 19, wherein the first protective stop position and the second protective stop position are positioned based on a predeterminable or detectable minimum distance.

28. The method according to claim 19, wherein the adjusting path is copied onto a virtual position axis, the first protective stop position and the second protective stop position which is based on the first protective stop position are arranged fixed on the virtual position axis, the actual adjustment position being assigned to a virtual position value on the virtual position axis, and the virtual position axis being aligned with the adjusting path if a shift in the virtual position axis relative to the adjusting path is determined.

29. The method according to claim 28, wherein the shift in the position axis relative to the adjusting path is calculated based on an adjustment position associated with a block blocking the adjusting motion so that the first protective stop position is positioned in the region of the first mechanical stop and the second protective stop position is positioned in the region of the second mechanical stop.

30. The method according to one of claims 28 and 29, wherein at least one of the protective stop positions is deactivated if a shift in the virtual position axis relative to the adjusting path is determined.

31. The method according to claim 19, wherein at least one of the protective stop positions is deactivated at least temporarily if after a stopping of the adjusting motion conditioned by one of the protective stop positions, the adjusting device is controlled again in the adjusting direction.

32. The method according to claim 19, wherein at least one of the protective stop positions is deactivated at least temporarily if a predetermined number of adjustments of the adjusting device is detected.

33. The method according to claim 19, wherein the first learning range limit is assigned to the first mechanical stop, the second learning range limit is assigned to the second mechanical stop, a blocking range is provided between the first learning range limit and the second learning range limit, and at least one of the protective stop positions is deactivated if a blocking of the adjusting motion is determined within the blocking range.

34. The method according to claim 1, wherein responsive to a detecting of the mechanical block, the protective stop position which may be inactivated through the user action is set, the protective stop position being replaced with through the updated protective stop position which is independent of the user action responsive to a detection of the condition associated with the adjusting motion.

35. The method according to claim 34, wherein the condition is associated with the adjusting motion into one of the mechanical stops.

36. The method according to claim 35, wherein the condition is associated with a position of the mechanical stop opposite the blocking in the adjusting path.

37. The method according to claim 36, wherein the opposing mechanical stop is determined from a minimum spacing of the two mechanical stops.

38. The method according to claim 35, wherein the condition is associated with an adjusting characteristic at the blocking, the method further comprising evaluating a development over a progression path and associating the development to a development of an adjustment variable.

39. The method according to claim 34, wherein the condition is sensing the blocking at one of the mechanical stops.

40. The method according to claim 34, wherein the condition is determining that an inaccuracy of a specific adjustment position does not exceed a maximum value.

41. The method according to claim 40, wherein the inaccuracy is based on a number of adjustments, and the condition is determining that the number of adjustments does not exceed a maximum value.

42. The method according to one of claims 40 or 41, wherein the inaccuracy is based on a number of direction changes of the adjustment, and the condition is determining that the number of direction changes of the adjustment does not exceed a maximum value.

43. The method according to claim 40, wherein the inaccuracy is based on a break in the supply voltage of the adjusting device, and the condition is determining that there are no detections of the break in the supply voltage during an adjustment.

44. The method according to claim 34, wherein the condition is sensing an adjustment position independent of the blocking in the adjusting position between the mechanical stops.

45. The method according to claim 34, wherein a jamming detector is configured to detect jamming of objects or persons through the adjusting device in the vehicle, and the condition is detecting that no jamming has occurred.

46. The method according to claim 34, wherein the adjusting device is operated in a calibrating mode and the condition is that in this calibrating mode the blocking is carried out at the mechanical stops.

47. The method according to claim 34, wherein the user action is undertaken through manual actuation of an operating device controlling the adjusting device.

48. The method according to claim 47, wherein the user action is renewed manual actuation of an actuating element of the operating device assigned to the direction of the adjusting motion after setting the protective stop position.

49. The method according to claim 48, wherein the user action is manual actuation of a release actuating element.

50. The method according to claim 34, wherein the user action is undertaken interactively via an input unit and an output unit between the adjusting device and the user.

51. The method according to claim 34, wherein to replace the protective stop position with the updated protective stop position, the protective stop is changed from a protective stop position which may be inactivated to a protective stop position which is independent of user action.

52. The method according to claim 34, wherein to replace the protective stop position with the updated protective stop position, the protective stop position is cancelled and the updated protective stop position is activated.

53. The method according to claim 34, wherein when setting the protective stop position as a result of detection of the mechanical block, a second protective stop position is set, the second protective stop position being associated with the mechanical stop opposing the blocking in the adjusting path, and wherein on reaching the second protective stop position, both the protective and second protective stop positions are replaced by third and fourth protective stop positions that are maintained despite the user action.

54. The method according to claim 53, wherein on not reaching the second protective stop position in the event of renewed blockage, the second protective stop position is reset opposite the actual blockage in the adjusting path.

55. The method according to one of claims 53 and 54, wherein the set protective stop position is a protective stop position which may be inactivated by user action, wherein the condition dependent on the adjusting motion is reaching the second protective stop position.

56. The method according to claim 53, wherein the second protective stop position is set at a predetermined minimum distance in the adjusting path away from the blockage or the set protective stop position, the minimum distance being based on a desired travel path.

57. The method according to claim 34, wherein the adjustment position is associated with a position value, the association being changed in dependence on the adjustment of the adjusting device, the position value being corrected when a shift of the position value relative to the actual adjustment position is determined, the correction including setting an actual position value to the actual adjustment position.

58. The method according to claim 57, wherein the position value is corrected when the condition associated with the adjusting motion is fulfilled.

59. The method according to claim 34, further comprising determining a learning range associated with the protective stop position whose range limits are set based on the position of the protective stop position, wherein in correcting the protective stop position, the setting of the updated protective stop position is permitted if a new position value associated with the updated protective stop position or the mechanical block lies within the learning range.

60. The method according to claim 59, wherein the range limits of the learning range are set if the learning range is associated with the protective stop position which is independent of the user action.

61. The method according to claim 7, wherein in the event of detecting the mechanical block, first and second protective stop positions which may be inactivated by user action are set, the second protective stop position being associated with the mechanical stop set opposite the blockage in the adjusting path and being located a predetermined distance away from the first protective stop position, the first and second protective stop positions each being replaceable by a new protective stop position independent of the user action when the adjustment position reaches the position of the second protective stop position.

62. The method according to claim 61, further comprising:

setting one or more memory positions for automatically moving the adjusting device to the set memory positions, the memory positions being set in relation to the first and second protective stop positions; and

updating the protective stop positions in response to a detection of a blockage on the adjusting path.

63. The method according to one of claims 61 and 62, wherein in response of an adjustment position not being located between the first protective stop position and the second protective stop position, the first and second protective stop positions being deactivated and the adjustment position being set to a value between the first and second protective stop positions.

64. The method according to claim 62, wherein the memory positions are either deactivated or set to the actual value of the adjustment position.

65. The method according to claim 61, wherein the predetermined distance is calculated based on a distance between the mechanical stops detected during original calibration.