Method and control device for avoiding an overheating of a brake of a vehicle

Patent metadata

Field	Value
Publication number	US-10654462-B2
Application number	US-201715784817-A
Country	US
Kind code	B2
Filing date	Oct 16, 2017
Priority date	Apr 17, 2015
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

In a method for avoiding an overheating of a brake of a vehicle, in particular of a commercial vehicle and/or a trailer, a first temperature signal and at least a second temperature signal are read in, with the first temperature signal representing a temperature of the brake and/or of a functional part of the brake, and the at least second temperature signal representing at least one additional temperature of at least one additional brake of the vehicle. An error state of the brake is detected using the first temperature signal and the second temperature signal in order to avoid an overheating of the brake. A control device for carrying out the method is also disclosed.

First claim

What is claimed is:

1. A method for avoiding overheating of a brake of at least one of a utility vehicle, a trailer, and both a utility vehicle and a trailer, comprising:
reading in a first temperature signal representing a temperature of the brake, a functional part of the brake, or both the brake and the functional part of the brake;
reading in at least one second temperature signal representing at least one further temperature of at least one further brake of the vehicle;
determining a fault state of the brake using the first temperature signal and the second temperature signal;
distributing a braking request between the utility vehicle and the trailer or among axles of the utility vehicle and the trailer upon determining the fault state in order to avoid overheating of the brake; and
when an increase, constant in a tolerance range, in the temperature of brake linings of the brake is ascertained, with a rotating wheel, performing a braking operation at a relatively high brake pressure, once during a subsequent operational braking operation, with an unchanged braking performance of the vehicle, and/or applying the brake at least once when the vehicle is stationary.

2. The method as claimed in claim 1 , wherein the brake is arranged on an axle, and the at least one further brake is arranged on the same axle or on a further axle.

3. The method as claimed in claim 1 , wherein for determining the fault state, a temperature difference is determined as a difference between the first temperature signal and the further temperature signal, and the fault state is determined if the temperature difference exceeds a difference threshold value.

4. The method as claimed in claim 1 , wherein, when reading in the first temperature signal, an additional temperature signal is read in, which additional temperature signal represents an additional temperature of an additional brake and/or of a functional part of the additional brake, and wherein, when determining the fault state, the fault state is determined using the additional temperature signal.

5. The method as claimed in claim 4 , wherein, when determining the fault state, the temperature difference is determined as a difference between the temperature signal or the temperature and a mean value of the temperature signals or of the temperature represented by the temperature signals, and wherein the mean value is defined as at least one of a median, a trimmed mean value, an arithmetic mean, and an expected value.

6. The method as claimed in claim 2 , wherein, in the event of a fault state and/or when a constant, relatively high temperature is detected after braking, an acoustic and/or visual signal is output.

7. The method as claimed in claim 1 , wherein a detected fault state is transmitted via a logbook system or geolocalization system to a workshop for supplying a spare part or planning a service interval.

8. The method as claimed in claim 1 , wherein measurement of at least one temperature is carried out using a pole wheel and/or an ABS sensor.

9. The method as claimed in claim 1 , characterized in that the signals are passed on in a wireless fashion.

10. The method as claimed in claim 2 , wherein for determining the fault state, a temperature difference is determined as a difference between the first temperature signal and the further temperature signal, and the fault state is determined if the temperature difference exceeds a difference threshold value.

11. The method as claimed in claim 2 , wherein, when reading in the first temperature signal, an additional temperature signal is read in, which additional temperature signal represents an additional temperature of an additional brake and/or of a functional part of the additional brake, and wherein, when determining the fault state, the fault state is determined using the additional temperature signal.

12. The method as claimed in claim 11 , wherein, when determining the fault state, the temperature difference is determined as a difference between the temperature signal or the temperature and a mean value of the temperature signals or of the temperature represented by the temperature signals, and wherein the mean value is defined as at least one of a median, a trimmed mean value, an arithmetic mean, and an expected value.

13. The method as claimed in claim 2 , wherein a detected fault state is transmitted via a logbook system or geolocalization system to a workshop for supplying a spare part or planning a service interval.

14. The method as claimed in claim 3 , wherein a detected fault state is transmitted via a logbook system or geolocalization system to a workshop for supplying a spare part or planning a service interval.

15. The method as claimed in claim 4 , wherein a detected fault state is transmitted via a logbook system or geolocalization system to a workshop for supplying a spare part or planning a service interval.

16. A controller for executing the method as claimed in claim 1 , the controller comprising:
an interface for reading in the first temperature signal and at least the second temperature signal; and
a determining device for determining the fault state of the brake using the first temperature signal and the second temperature signal, in order to avoid overheating of the brake.

17. A brake system for at least one of a utility vehicle, a trailer, and a utility vehicle and a trailer, comprising:
a controller for executing the method of claim 1 ;
a first brake, arranged on an axle, the brake designed to supply one of the first and second temperature signals; and
a second brake, arranged on the axle or on a further axle, the second brake designed to supply another of the first and second temperature signals.

18. A utility vehicle, a trailer, or a utility vehicle and a trailer, having a brake system as claimed in claim 17 .

19. A computer program product with program code for carrying out the method of claim 1 , wherein the computer program product is executed on a controller comprising:
an interface for reading in the first temperature signal and at least the second temperature signal; and
a determining device for determining the fault state of the brake using the first temperature signal and the second temperature signal, in order to avoid overheating of the brake.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Hecker Falk
• Koch Werner
• Mayr Mathias
• Theil Robert
• Werth Alexander

Classifications

• F16D66/00

  Arrangements for monitoring working conditions, e.g. wear, temperature · CPC title

• B60T2270/406

  Test-mode; Self-diagnosis · CPC title

• B60T17/221 Primary

  Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems (hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M) · CPC title

• B60T17/22

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• F16D2066/001

  Temperature · CPC title