Method for guaranteeing reliability of emergency operating conditions of a motor vehicle tyres

• US 20050057347A1
• Filed: 08/24/2002
• Published: 03/17/2005
• Est. Priority Date: 10/11/2001
• Status: Active Grant

• Current Assignee: Daimler AG (Mercedes-Benz Group AG)
• Original Assignee: Daimler Chrysler Company LLC (Stellantis NV)
• Inventors: Weissenger, Juergen, Runtsch, Gerd, Gaus, Hermann, Baader, Dirk
• Granted Patent: US 7,455,140 B2
• Time in Patent Office: Days
• US Class Current: 340/442
• CPC Class Codes: B60C 23/20 Devices for measuring or signalling tyre temperature only
• CPC Class Codes: B60K 28/10 responsive to conditions relating to the vehicle
• CPC Class Codes: B60K 31/04 and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
• CPC Class Codes: B60W 2530/20 Tyre data
• CPC Class Codes: B60W 30/146 Speed limiting

Abstract

In a method for ensuring safe tire emergency running operation in a motor vehicle that is equipped with tires that have emergency running properties when the tire pressure is greatly reduced or absent altogether, a device is provided for detecting an emergency running mode of the motor vehicle. The device for limiting the driving speed limits the driving speed of the motor vehicle whenever emergency running is detected.

Claims

1-10. -10. (Cancelled)

11. A method for ensuring safe tire emergency running operation in a motor vehicle that is equipped with tires having emergency running properties when the tire pressure is greatly reduced or absent altogether, and a device which detects that the motor vehicle is in a tire emergency running mode, wherein:

upon detection of tire emergency running operation, driving speed of the motor vehicle is limited by the device for detecting the tire emergency running mode.

12. The method as claimed in claim 11, wherein at least one further predeterminable condition must be satisfied in order for the driving speed of the motor vehicle to be limited when tire emergency running operation is detected.

13. The method as claimed in claim 12, wherein:

driving speed is recorded; and

a driving speed threshold value is set as a predeterminable condition; and

driving speed is limited to a predeterminable limit value when the recorded driving speed drops below the driving speed threshold value.

14. The method as claimed in claim 13, wherein the driving speed threshold value is equal to the limit value.

17. The method as claimed in claim 12, wherein:

a change in tire temperature time is determined;

a threshold value for the change in tire temperature is predetermined as the predeterminable condition; and

the driving speed is limited to a predeterminable limit value when the determined change in tire temperature over time exceeds the threshold value.

18. The method as claimed in claim 17, wherein the driving speed is limited to a predeterminable limit value when the determined change in the tire temperature over time exceeds the threshold value for the change in tire temperature for a predeterminable period of time.

19. The method as claimed in claim 12, wherein:

an accelerator pedal displacement threshold value is predetermined; and

limitation driving speed is interrupted for a predeterminable period of time if the accelerator pedal is depressed beyond the pedal displacement threshold value.

20. The method as claimed in claim 19, wherein:

the full throttle position is predetermined as the accelerator pedal displacement threshold value; and

the limit on the driving speed is interrupted for a predeterminable period of time if the accelerator pedal is moved into the full throttle position.