METHOD AND DEVICE FOR WEAR DIAGNOSIS OF A MOTOR VEHICLE

• US 20110234391A1
• Filed: 08/20/2009
• Published: 09/29/2011
• Est. Priority Date: 09/30/2008
• Status: Active Grant

• Current Assignee: Vitesco Technologies GmbH (Continental AG)
• Original Assignee: Continental Automotive GmbH (Continental AG)
• Inventors: Grolleau, Matthieu, Kiran, Suraj, Caramigeas, Thierry, Barth, Reinhard, Lobey, Olivier
• Granted Patent: US 8,970,359 B2
• Time in Patent Office: Days
• US Class Current: 340/438
• CPC Class Codes: G07C 5/006 Indicating maintenance
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005

Abstract

In a method and a device for wear diagnosis of a motor vehicle, driving events and driving conditions occurring during driving operation are detected, the detected driving events and driving conditions are assigned in each case a wear index value using a table which is stored in a memory of the motor vehicle and which adds up the wear index values assigned to the detected driving events and driving conditions in order to form a total wear index value, and the determined total wear index value is compared with a reference total wear index value derived from a stored characteristic curve.

Claims

1. A method for wear diagnosis of a motor vehicle, comprising:

detecting driving events and driving conditions occurring during the driving operation of the motor vehicle,

assigning the detected driving events and driving conditions in each case to a wear index value using a table which is stored in a memory of the motor vehicle,

adding the wear index values assigned to the detected driving events and driving conditions in order to form a total wear index value, and

comparing the total wear index value with a reference total wear index value derived from a stored reference characteristic curve.

2. The method according to claim 1, further comprising:

producing an assignment table in which in each case a wear index value is assigned to a multiplicity of driving events and driving conditions,

producing a reference characteristic curve for the total wear index value, and

storing the assignment table and the reference characteristic curve in the memory of the motor vehicle.

3. The method according to claim 1, wherein the comparison of the total wear index value with the reference total wear index value derived from the reference characteristic curve is carried out at predefined distance readings of the motor vehicle.

4. The method according to claim 1, wherein the comparison of the total wear index value with the reference total wear index value derived from the reference characteristic curve is carried out at predefined time intervals.

5. The method according to claim 1, wherein the reference characteristic curve comprises reference total wear index values which are each assigned to a distance reading of the motor vehicle.

6. The method according to claim 5, wherein a reference total wear index value which is assigned to a desired overall service life of the motor vehicle is predefined.

7. The method according to claim 1, wherein if a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, an acoustic and/or visual warning signal is output.

8. The method according to claim 1, wherein if a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, a warning signal is stored in a fault memory of the motor vehicle.

9. The method according to claim 1, wherein if a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, one or more vehicle assemblies are actuated in such a way that the future wear occurring during the driving operation is reduced.

10. A device for wear diagnosis of a motor vehicle, comprising:

a control unit operable to detects driving events and driving conditions occurring during the driving operation of the motor vehicle, and

a memory operable to store an assignment table, according to which assignment table driving events and driving conditions are each assigned a wear index value,

and to store a reference characteristic curve, according to which reference characteristic curve predefined distance readings of the motor vehicle are each assigned a reference total wear index value, and

Wherein the control unit is operable to assign in each case a wear index value to driving events and driving conditions detected during the driving operation, using the stored assignment table, to add these wear index values to form a total wear index value and to compare the total wear index value with an associated reference total wear index value derived from the stored reference characteristic curve.

11. The device according to claim 10, wherein said device has a memory which is provided for storing the total wear index value determined during the driving operation.

12. The device According to claim 10, wherein the comparison of the total wear index value determined during the driving operation with an associated reference total wear index value derived from the stored reference characteristic curve is carried out by the control unit at predefined distance readings of the motor vehicle.

13. The device according to claim 10, wherein the comparison of the total wear index value determined during the driving operation with an associated reference total wear index value derived from the stored reference characteristic curve is carried out by the control unit at predefined time intervals.

14. The device according to claim 10, wherein when a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, the control unit actuates an output unit in such a way that at least one of an acoustic and a visual warning signal is output.

15. The device according to claim 10, wherein when a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, the control unit initiates storage of a warning signal in a fault memory of the motor vehicle.

16. The device according to claim 10, wherein when a total wear index value determined during the driving operation is larger than an associated reference total wear index value derived from the reference characteristic curve, the control unit actuates one or more vehicle assemblies in such a way that the wear occurring during the driving operation is reduced.

17. A system for wear diagnosis of a motor vehicle, comprising:

means for detecting driving events and driving conditions occurring during the driving operation of the motor vehicle,

means for assigning the detected driving events and driving conditions in each case to a wear index value using a table which is stored in a memory of the motor vehicle,

means for adding the wear index values assigned to the detected driving events and driving conditions in order to form a total wear index value, and

means for comparing the total wear index value with a reference total wear index value derived from a stored reference characteristic curve.

18. The system according to claim 17, further comprising:

means for producing an assignment table in which in each case a wear index value is assigned to a multiplicity of driving events and driving conditions,

means for producing a reference characteristic curve for the total wear index value, and

means for storing the assignment table and the reference characteristic curve in the memory of the motor vehicle.

19. The system according to claim 17, wherein the comparison of the total wear index value with the reference total wear index value derived from the reference characteristic curve is carried out at predefined distance readings of the motor vehicle.

20. The system according to claim 17, wherein the comparison of the total wear index value with the reference total wear index value derived from the reference characteristic curve is carried out at predefined time intervals.