METHOD AND APPARATUS FOR DIAGNOSING A CHASSIS FRAME STATE

• US 20140074350A1
• Filed: 09/11/2013
• Published: 03/13/2014
• Est. Priority Date: 09/12/2012
• Status: Abandoned Application

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: DEGENSTEIN, Thomas, CHAARI, Lazhar, SCHAEDLER, Olaf
• Application Number:
  US14/023,976
• Publication Number:
  US 20140074350A1
• Time in Patent Office: Days
• US Class Current: 701/34.4
• CPC Class Codes: G01M 17/007 Wheeled or endless-tracked vehicles G01M17/08 takes precedence
• CPC Class Codes: G07C 5/0825 using optical means

Abstract

A method is provided for diagnosing the chassis frame state of a motor vehicle, which includes, but is not limited to ascertaining at least one diagnostic variable and displaying this diagnostic variable. At least one ascertained and displayed diagnostic variable indicates a balance, track width and/or brake disk planarity state for a chassis frame of the motor vehicle; and/or is determined based on an in particular periodic asymmetry in a steering gear.

Claims

1. A method for diagnosing a chassis frame state of a motor vehicle, comprising:

ascertaining a diagnostic variable; and

displaying the diagnostic variable;

wherein the diagnostic variable indicates a parameter for a chassis frame of the motor vehicle, and

wherein the diagnostic variable is determined based at least in part on periodic asymmetry in a steering gear.

2. The method according to claim 1, wherein the diagnostic variable is determined based at least in part on an SRS value.

3. The method according to claim 1, wherein a state of the chassis frame on which the diagnostic variable at least partially depends is an at least partially compensated diagnostic variable.

4. The method according to claim 1, wherein the diagnostic variable is transferred if a change therein exceeds a prescribed limit.

5. The method according to claim 1, wherein the diagnostic variable is displayed in an activatable diagnostic mode.

6. The method according to claim 1, wherein the diagnostic variable is displayed as an evaluated diagnostic variable.

7. The method according to claim 1, wherein the diagnostic variable is displayed during vehicle operation.

10. The method according to claim 1, wherein the parameter is balance.

11. The method according to claim 1, wherein the parameter is track width.

12. The method according to claim 1, wherein the parameter is a brake disk planarity state.

13. The method according to claim 1, wherein the diagnostic variable is determined based at least in part on a vehicle speed.

8. A diagnostic device for diagnosing a chassis frame state of a motor vehicle, comprising:

a determination device that is configured to ascertain diagnostic variable indicating a parameter for a chassis frame of the motor vehicle based at least in part on a periodic asymmetry in a steering gear; and

a display device that is configured to display the diagnostic variable.

14. The diagnostic device according to claim 8, wherein the diagnostic variable is displayed inside the motor vehicle.

15. The diagnostic device according to claim 8, wherein the parameter is balance.

16. The diagnostic device according to claim 8, wherein the parameter is track width.

17. The diagnostic device according to claim 8, wherein the parameter is a brake disk planarity state.

18. The diagnostic device according to claim 8, wherein the diagnostic variable is determined based at least in part on an SRS value.

19. The diagnostic device according to claim 8, wherein a state of the chassis frame on which the diagnostic variable at least partially depends is an at least partially compensated diagnostic variable.

20. The diagnostic device according to claim 8, wherein the diagnostic variable is transferred if a change therein exceeds a prescribed limit.

21. The diagnostic device according to claim 8, wherein the diagnostic variable is displayed in an activatable diagnostic mode.

9. (canceled)