Method and device for determining a braking torque on a braking system for a rail vehicle

Patent metadata

Field	Value
Publication number	US-10071715-B2
Application number	US-201414889673-A
Country	US
Kind code	B2
Filing date	May 9, 2014
Priority date	May 13, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A method for determining a braking torque on a braking system for a rail vehicle. The braking system associated with at least one wheel or at least one wheelset includes at least one brake disc for generating a braking force in response to at least one brake signal, at least one brake lining interacting with the brake disc and a brake caliper connected to the brake lining and a brake housing and a securing bracket. The brake caliper is mounted together with a brake housing in at least one first bearing point and a second bearing point, the second bearing point is at a distance from the first bearing point at a predefined bearing distance, a first sensor for providing a first measuring signal and a second sensor for providing a second measuring signal are arranged on the brake housing or between the housing and the bracket.

First claim

The invention claimed is:

1. A method for determining a braking torque at a brake system for a rail vehicle, wherein, to generate a braking force in response to a braking signal, the brake system, which is assigned to at least one wheel or at least one wheelset, comprises at least one brake disk, at least one brake pad which interacts with the brake disk, a brake caliper which is connected to the brake pad, and also connected to one of a brake housing and a bracket, wherein the brake caliper is mounted by way of a brake housing at at least one first bearing point and one second bearing point, wherein the second bearing point is spaced apart from the first bearing point by a predefined bearing spacing, wherein a first sensor for providing a first measurement signal and at least one second sensor for providing a second measurement signal are arranged on the brake system, wherein the first measurement signal and the second measurement signal each represent a bearing force, or a value derived therefrom, the method comprising:
reading in the first measurement signal and the second measurement signal; and
detecting a braking torque using an installation dimension, the bearing spacing and the first measurement signal and the second measurement signal, wherein the installation dimension corresponds to the spacing between an axis of rotation of the brake disk and the first bearing point, and
generating a braking force in response to the detected braking torque.

2. The method of claim 1 , wherein, the first measurement signal represents a first bearing force associated with the first bearing point, and the second measurement signal represents a second bearing force associated with the second bearing point.

3. The method of claim 1 , wherein, in the detection step, a friction force is detected using the first measurement signal and the second measurement signal.

4. The method of claim 1 , wherein, in the reading-in step, a first and a second measurement signal are read in, wherein the first measurement signal and the second measurement signal each represent a deformation in the brake system.

5. The method of claim 4 , wherein, in the detection step, a contact pressure force of the brake pad against the brake disk is detected using the first measurement signal and the second measurement signal, when the brake disk is not in rotation and, in a standstill state, no friction force is transmitted.

6. The method of claim 1 , wherein, in the detection step, a friction radius is detected using the installation dimension, the bearing spacing and the first measurement signal and the second measurement signal, wherein the friction radius represents a spacing between an axis of rotation of the wheel and a resultant point of action of the brake pad on the brake disk.

7. The method of claim 1 , wherein, in the reading-in step, an item of information regarding a change in length of the installation dimension and/or an item of information regarding a change in a position of an axis of the wheel in a tolerance range perpendicular to the direction of extent of the installation dimension are/is read in, and wherein, in the detection step, the braking torque and/or the friction force and/or the friction radius are/is detected using the item of information regarding a change in length and/or the item of information regarding a change in a position.

8. The method of claim 7 , wherein, in the determination step, the braking force is determined using a friction radius.

9. A non-transitory computer program product having program code that, when executed, carries out the method of claim 1 .

10. A method for outputting a braking signal for a braking force at a brake system for a rail vehicle, wherein, to generate a braking force in response to a braking signal, the brake system, which is assigned to at least one wheel or at least one wheelset, comprises at least one brake disk, at least one brake pad which interacts with the brake disk, and a brake caliper which is connected to the brake pad, wherein the brake caliper is mounted by way of a brake housing at at least one first bearing point and one second bearing point, wherein the second bearing point is spaced apart from the first bearing point by a predefined bearing spacing, wherein a first sensor for providing a first measurement signal and a second sensor for providing a second measurement signal are arranged on the brake caliper, wherein the first measurement signal and the second measurement signal each represent a bearing force, or a value derived therefrom, the method comprising:
reading in a braking torque that has been detected as recited in claim 1 , and
determining a braking force using a predetermined setpoint braking torque and the read-in braking torque to output a braking signal and generating a braking force in response to the output braking signal.

11. The method of claim 10 , wherein, in the determination step, the braking force is determined using a friction force.

12. An apparatus for determining a braking torque at a brake system for a rail vehicle, wherein, to generate a braking force in response to a braking signal, the brake system, which is assigned to at least one wheel or at least one wheelset, comprises at least one brake disk, at least one brake pad which interacts with the brake disk, and a brake caliper which is connected to the brake pad, wherein the brake caliper is mounted by way of the brake housing at at least one first bearing point and one second bearing point, wherein the second bearing point is spaced apart from the first bearing point by a predefined bearing spacing, wherein a first sensor for providing a first measurement signal and a second sensor for providing a second measurement signal are arranged either on the brake housing or between the brake housing and the bracket, wherein the first measurement signal and the second measurement signal each represent a bearing force, or a value derived therefrom, the apparatus comprising:
an interface for reading in the first measurement signal and the second measurement signal; and
a device configured to detect a braking torque using an installation dimension, the bearing spacing and the first measurement signal and the second measurement signal, wherein the installation dimension corresponds to the spacing between an axis of rotation of the brake disk and the first bearing point,
wherein the braking system is configured to generate a braking force in response to the detected braking torque.

13. An apparatus for outputting a braking signal for a braking force at a brake system for a rail vehicle, wherein, to generate a braking force in response to a braking signal, the brake system, which is assigned to at least one wheel or at least one wheelset, comprises at least one brake disk, at least one brake pad which interacts with the brake disk, and a brake caliper which is connected to the brake pad, wherein the brake caliper is mounted by way of the brake housing at at least one first bearing point and one second bearing point, wherein the second bearing point is spaced apart from the first bearing point by a predefined bearing spacing, wherein a first sensor for providing a first measurement signal and a second sensor for providing a second measurement signal are arranged on the brake caliper, wherein the first measurement signal and the second measurement signal each represent a bearing force, or a value derived therefrom, the apparatus comprising:
an interface for reading in the first measurement signal and the second measurement signal; and
a device configured to detect a braking torque using an installation dimension, the bearing spacing and the first measurement sig

Assignees

• Knorr Bremse Systeme

Inventors

• Mathieu Michael
• Grepl Roman
• Fuderer Erich
• Schubert Michael
• Elstorpff Marc-Gregory
• Lang Rupert

Classifications

• F16D2066/005

  Force, torque, stress or strain · CPC title

• F16D66/00

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

• B60T8/1705

  for rail vehicles · CPC title

• B60T8/52 Primary

  Torque sensing, i.e. wherein the braking action is controlled by forces producing or tending to produce a twisting or rotating motion on a braked rotating member · CPC title

• F16D55/2245

  in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes (similar brakes for rail vehicles B61H5/00) · CPC title