Braking control for rail vehicles with adaptive lining characteristic curve

Patent metadata

Field	Value
Publication number	US-11052884-B2
Application number	US-201616064939-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 21, 2015
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

The invention relates to a device and a method for controlling a braking device of a rail vehicle, wherein a pressure characteristic curve of the braking device is changed by means of characteristic curve change device as a function of a frictional characteristic of a type of brake lining used in the braking device.

First claim

The invention claimed is:

1. An apparatus for controlling a brake device of a rail vehicle, the apparatus comprising:
a characteristic curve changing device for varying a pressure characteristic curve of the brake device dependent on a friction characteristic of a brake pad type used in the brake device, wherein the characteristic curve changing device effects a vertical shift of pressure-speed characteristic curve along the pressure axis dependent on the friction characteristic, and
a determining device for determining the friction characteristic based on a control signal, which indicates the selected brake pad type
wherein the friction characteristic of the brake pad type is an average friction coefficient.

2. The apparatus of claim 1 , wherein the apparatus generates the control signal in response to a manual, electrical, electronic or electropneumatic switchover connected to the use of a new brake pad type.

3. The apparatus of claim 1 , wherein the apparatus generates the control signal for the variation of the pressure characteristic curve both in a rapid braking operation and in a normal service braking operation.

4. The apparatus of claim 1 , wherein the characteristic curve changing device effects the vertical shift of the pressure-speed characteristic curve in a pressure transmitter by aerating an additional pilot-control volume or by generating an additional piston area by connecting two control chambers.

5. The apparatus of claim 4 , wherein the characteristic curve changing device performs the aeration of the additional pilot-control volume or the generation of the additional piston area by actuating a solenoid valve.

6. The apparatus of claim 5 , wherein the solenoid valve is an impulse valve.

7. The apparatus of claim 1 , wherein the characteristic curve changing device effects the vertical shift of the pressure-speed characteristic curve in a pressure transmitter by pressure variation in a second control chamber of two control chambers.

8. The apparatus of claim 7 , wherein the characteristic curve changing device performs the pressure variation in multi-stage fashion.

9. A brake system for a rail vehicle, having an apparatus controlling a brake device of the rail vehicle, the apparatus comprising:
a characteristic curve changing device for varying a pressure characteristic curve of the brake device dependent on a friction characteristic of a brake pad type used in the brake device, wherein the characteristic curve changing device effects a vertical shift of pressure-speed characteristic curve along the pressure axis dependent on the friction characteristic, and
a determining device for determining the friction characteristic based on a control signal which indicates the selected brake pad type
wherein the friction characteristic of the brake pad type is an average friction coefficient.

10. A method for controlling a brake device of a rail vehicle, the method comprising:
varying a pressure characteristic curve of the brake device in a manner dependent on a friction characteristic of a brake pad type used in the brake device, wherein the varying is a vertical shift of pressure-speed characteristic curve along the pressure axis dependent on the friction characteristic, and
determining the friction characteristic based on a control signal which indicates the brake pad type
wherein the friction characteristic of the brake pad type is an average friction coefficient.

11. The method of claim 10 , wherein the varying and determining are part of a braking process, wherein the braking process is a rapid braking operation.

12. A non-transitory computer program product having code means for controlling a brake device of the rail vehicle, when the computer program is executed in a computer system, the method comprising varying a pressure characteristic curve of the brake device in a manner dependent on a friction characteristic of a brake pad type used in the brake device, wherein the varying is a vertical shift of pressure-speed characteristic curve along the pressure axis dependent on the friction characteristic, and determining the friction characteristic based on a control signal which indicates the brake pad type, wherein the friction characteristic of the brake pad type is an average friction coefficient.

Assignees

• Knorr Bremse Systeme

Inventors

• Herden Marc-Oliver

Classifications

• B60T8/1818

  Lever mechanism · CPC title

• B60T2270/14

  hydraulic model · CPC title

• B60T8/56

  having means for changing the coefficient of friction · CPC title

• B61H13/34

  Details · CPC title

• B60T8/1705 Primary

  for rail vehicles · CPC title