Claims
- 1. A system for controlling a brake pressure valve having a storage pressure input, a brake pressure output, an electromagnet and an armature, the armature being operable by excitation of the electromagnet for opening-up or shutting-off the storage pressure input with respect to the brake pressure output, the system comprising:
a voltage source; an electronic control system for controlling a pulse-type excitation of the electromagnet; and a measuring device for measuring an actually present supply voltage of the voltage source, wherein the electronic control system generates voltage pulses for exciting the electromagnet in order to generate a defined opening or closing movement sequence of the armature, the electronic control system varying pulse times as a function of the actually present supply voltage.
- 2. The system according to claim 1, wherein the electronic control system varies at least one of a duration of the voltage pulses and non-excited states situated in-between the voltage pulses.
- 3. The system according to claim 1, wherein the electromagnet is excited such that, at a start of the opening or closing movement of the armature, an active value of the voltage present at the electromagnet is equal to a defined attraction voltage (UA) which is higher than a minimum attraction voltage (UAmin) of the armature.
- 4. The system according to claim 2, wherein the electromagnet is excited such that, at a start of the opening or closing movement of the armature, an active value of the voltage present at the electromagnet is equal to a defined attraction voltage (UA) which is higher than a minimum attraction voltage (UAmin) of the armature.
- 5. The system according to claim 1, wherein when the armature is pulled-in, the electromagnet is excited such that an active value of the voltage present in the pulled-in armature position at the electromagnet is equal to a defined holding voltage (UH) which is lower than the attraction voltage (UA).
- 6. The system according to claim 2, wherein when the armature is pulled-in, the electromagnet is excited such that an active value of the voltage present in the pulled-in armature position at the electromagnet is equal to a defined holding voltage (UH) which is lower than the attraction voltage (UA).
- 7. The system according to claim 3, wherein when the armature is pulled-in, the electromagnet is excited such that an active value of the voltage present in the pulled-in armature position at the electromagnet is equal to a defined holding voltage (UH) which is lower than the attraction voltage (UA).
- 8. The system according to claim 1, wherein cyclically at regular intervals or, as required, for a short time for a defined time period (Δt1), the excitation of the electromagnet is varied such that an active voltage (UR) is present at the electromagnet which is higher than the holding voltage (UH) and lower than the attraction voltage (UA).
- 9. The system according to claim 2, wherein cyclically at regular intervals or, as required, for a short time for a defined time period (Δt1), the excitation of the electromagnet is varied such that an active voltage (UR) is present at the electromagnet which is higher than the holding voltage (UH) and lower than the attraction voltage (UA).
- 10. The system according to claim 3, wherein cyclically at regular intervals or, as required, for a short time for a defined time period (Δt1), the excitation of the electromagnet is varied such that an active voltage (UR) is present at the electromagnet which is higher than the holding voltage (UH) and lower than the attraction voltage (UA).
- 11. The system according to claim 5, wherein cyclically at regular intervals or, as required, for a short time for a defined time period (Δt1), the excitation of the electromagnet is varied such that an active voltage (UR) is present at the electromagnet which is higher than the holding voltage (UH) and lower than the attraction voltage (UA).
- 12. The system according to claim 1, wherein a pressure sensor is provided for measuring the actual storage pressure and a pressure sensor is provided for measuring the actual brake pressure.
- 13. The system according to claim 2, wherein a pressure sensor is provided for measuring the actual storage pressure and a pressure sensor is provided for measuring the actual brake pressure.
- 14. The system according to claim 3, wherein a pressure sensor is provided for measuring the actual storage pressure and a pressure sensor is provided for measuring the actual brake pressure.
- 15. The system according to claim 5, wherein a pressure sensor is provided for measuring the actual storage pressure and a pressure sensor is provided for measuring the actual brake pressure.
- 16. The system according to claim 8, wherein a pressure sensor is provided for measuring the actual storage pressure and a pressure sensor is provided for measuring the actual brake pressure.
- 17. The system according to claim 1, wherein an electronic memory is provided which is connected with the electronic control system, characteristic diagrams being stored in the memory by which, from actually present brake system parameters, desired pulse times or desired pulse frequencies are obtainable for controlling the electromagnet.
- 18. The system according to claim 2, wherein an electronic memory is provided which is connected with the electronic control system, characteristic diagrams being stored in the memory by which, from actually present brake system parameters, desired pulse times or desired pulse frequencies are obtainable for controlling the electromagnet.
- 19. The system according to claim 3, wherein an electronic memory is provided which is connected with the electronic control system, characteristic diagrams being stored in the memory by which, from actually present brake system parameters, desired pulse times or desired pulse frequencies are obtainable for controlling the electromagnet.
- 20. The system according to claim 17, wherein the actually present brake system parameters include a momentary actual brake pressure and an actual storage pressure.
- 21. The system according to claim 18, wherein the actually present brake system parameters include a momentary actual brake pressure and an actual storage pressure.
- 22. The system according to claim 19, wherein the actually present brake system parameters include a momentary actual brake pressure and an actual storage pressure.
- 23. The system according to claim 17, wherein the electronic control system modifies the stored desired pulse times or desired pulse frequencies according to actually learned parameters.
- 24. The system according to claim 1, wherein the electromagnet and the armature are dimensioned such that the armature pulls-in at a lowest possible supply voltage occurring during the operation.
- 25. A method for controlling a brake pressure valve having a storage pressure input, a brake pressure output, an electromagnet and an armature, wherein an electronic control system controls a voltage source coupled to the electromagnet in a pulse-type excitation manner, the method comprising the acts of:
measuring an actually present supply voltage and providing the actually present supply voltage to the electronic control system; generating voltage pulses for exciting the electromagnet by the electronic control system for a defined opening/closing movement sequence of the armature, the electronic control system varying pulse times as a function of the actually present supply voltage.
- 26. The method according to claim 25, wherein the act of varying the pulse times is carried out by varying at least one of a duration of the voltage pulses and a non-excitation state arranged in-between the voltage pulses.
- 27. The method according to claim 25, wherein the act of generating voltage pulses for exciting the electromagnet further comprises the act of maintaining an active value of the voltage present at the electromagnet equal to a defined attraction voltage which is higher than a minimum attractive voltage of the armature at the start of the opening/closing movement of the armature.
- 28. The method according to claim 27, wherein when the armature is pulled-in, the electronic control system excites the electromagnet such that an active value of the voltage present in the pulled-in armature position at the electromagnet is equal to a defined holding voltage which is lower than the attraction voltage.
- 29. The method according to claim 28, wherein cyclically at regular intervals or, as required, for a short time for a defined time period, the electronic control system varies the excitation of the electromagnet such that an active voltage is present at the electromagnet which is higher than the holding voltage and lower than the attraction voltage.
Priority Claims (1)
Number |
Date |
Country |
Kind |
100 57 900.0 |
Nov 2000 |
DE |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of PCT Application No. PCT/EP01/13581 filed on Nov. 22, 2001.
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCT/EP01/13581 |
Nov 2001 |
US |
Child |
10290260 |
Nov 2002 |
US |