METHOD FOR DEMANDING SAFETY REACTIONS FOR A RAIL VEHICLE

• US 20110093142A1
• Filed: 10/29/2010
• Published: 04/21/2011
• Est. Priority Date: 06/10/2008
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: WERKMEISTER, NORBERT, BURG, WILHELM
• Granted Patent: US 8,774,990 B2
• Time in Patent Office: Days
• US Class Current: 701/19
• CPC Class Codes: B61L 15/0063 Multiple on-board control systems, e.g. "2 out of 3"-systems

Abstract

A method for demanding safety reactions for a rail vehicle having a plurality of appliances each able to demand a safety reaction when required, namely a braking process or a traction inhibit or both for the rail vehicle, includes:

• • a) identification of a state in which one of the safety reactions should be carried out by one of the appliances,
  • b) demanding the safety reaction by the appliance through a data bus, and
  • c) feeding back information to the demanding appliance that the safety reaction has been carried out or intervening in a safety loop to initiate the desired safety reaction, if the safety reaction is not carried out.

Claims

1. A method for demanding safety reactions for a rail vehicle, the method comprising the following steps:

providing a plurality of appliances each configured to demand a safety reaction selected from the group consisting of a braking process, a traction inhibit and both a braking process and a traction inhibit for the rail vehicle when required, as follows;

a) identifying a state in which one of the safety reactions should be carried out by one of the appliances;

b) demanding the safety reaction by the appliance over a data bus; and

c) either feeding back information to the demanding appliance that the safety reaction has been carried out or intervening in a safety loop to initiate a desired safety reaction if the safety reaction has not been carried out.

2. The method for demanding safety reactions according to claim 1, which further comprises carrying out step b) by normally demanding low-wear full braking in the event of a braking demand.

3. The method for demanding safety reactions according to claim 1, which further comprises carrying out step c) by providing feedback through a measured pressure value for a main air line of the rail vehicle, when a braking process has been carried out.

4. The method for demanding safety reactions according to claim 1, which further comprises carrying out step c) by feeding back a braking process being carried out or a traction inhibit being carried out through a train speed value to the demanding appliance.

5. The method for demanding safety reactions according to claim 1, which further comprises carrying out step c) by feeding back a braking process being carried out through a braking control system or feeding back a traction inhibit being carried out through a drive control system to the demanding appliance.

6. The method for demanding safety reactions according to claim 1, which further comprises carrying out step c) by defining a predefined time period from the demand for the safety reaction for the feedback of a braking process being carried out or a traction inhibit bring carried out, and carrying out the intervention in the safety loop if there is no feedback to the appliance within the predefined time period.

7. The method for demanding safety reactions according to claim 1, which further comprises carrying out step b) by bridging the demand for the braking process or the traction inhibit with the appliance, if required.

8. The method for demanding safety reactions according to claim 7, which further comprises bridging the braking demand with fault switches.

9. The method for demanding safety reactions according to claim 8, which further comprises redundantly reading the fault switches and evaluating the fault switches with the appliances each being configured to demand a braking process or a traction inhibit for the rail vehicle when required.

10. The method for demanding safety reactions according to claim 1, which further comprises switching off the appliance when a demand for a braking process or a traction inhibit by a specific appliance is not desired.

11. The method for demanding safety reactions according to claim 1, which further comprises individually projecting a mode of the braking process or a traction inhibit demanded in step b).