EP4077072A1 - Steuerluftsystem und verfahren zur steuerung eines steuerluftsystems - Google Patents
Steuerluftsystem und verfahren zur steuerung eines steuerluftsystemsInfo
- Publication number
- EP4077072A1 EP4077072A1 EP20817273.4A EP20817273A EP4077072A1 EP 4077072 A1 EP4077072 A1 EP 4077072A1 EP 20817273 A EP20817273 A EP 20817273A EP 4077072 A1 EP4077072 A1 EP 4077072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- air
- control
- pressure
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000013022 venting Methods 0.000 abstract 2
- 230000001276 controlling effect Effects 0.000 description 8
- 239000000543 intermediate Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
- B60T1/087—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium in hydrodynamic, i.e. non-positive displacement, retarders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/04—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades causing a directed flow, e.g. Föttinger type
Definitions
- the invention relates to a control air system, MRCU, for providing compressed air with an adjustable air pressure in an air space, preferably for controlling the braking torque of a hydrodynamic retarder.
- the invention also relates to a method for checking the functional state of the control air system.
- the compressed air supply of the control air system for the hydrodynamic retarder is usually connected to the compressed air system of the motor vehicle, for example the compressed air supply for the brake air system that is used in Nutzfahrzeu conditions to release the brakes.
- DE 102011 106522 B3 describes a control air system and a method for controlling a hydrodynamic retarder by means of a control air system.
- an air space is provided which can be filled or emptied with compressed air via the control air system, so that a desired control air pressure is set in the air space.
- the control air pressure is recorded by means of a sensor which is arranged between an inlet valve and an outlet valve. The functionality of the inlet valve and the outlet valve is determined by specified switching sequences solely by means of the control air pressure detected by the sensor.
- DE 10 2014 201 750 A1 describes a method for monitoring a supply pressure in a pneumatic or hydraulic pressure system.
- the supply pressure is made available from a pressure supply.
- the actual value of the supply pressure is recorded and compared with a target pressure value. If the recorded actual value is smaller than the setpoint pressure value assigned in the comparison, a warning message is issued and / or the printing system or a unit controlled by it is put out of operation.
- the detection and the comparison of the actual value of the supply pressure and repetitions of the Druckver run in the pressure source can be made dependent.
- the object of the invention is to propose an alternative structure for a control air system with which an extended method for functional diagnosis can be carried out.
- the object is achieved according to the invention by a control air system according to claim 1 and a method according to claim 8. Further advantageous features of the embodiment according to the invention can be found in the subclaims.
- a control air system is proposed for providing compressed air with an adjustable air pressure in an air space, which is preferably suitable for controlling the braking torque of a hydrodynamic retarder.
- the basic structure of the control air system includes:
- control connection via which the air space can be filled with compressed air to provide a control air pressure
- compressed air supply line into which an electrically actuatable inlet valve is switched in order to supply compressed air to the air space
- a sensor for at least indirectly detecting or calculating the pressure between the inlet valve and the outlet valve;
- a control device which is set up to control or regulate the control air pressure in the air space.
- a switching device is connected upstream of the inlet valve in the compressed air supply line in the direction of flow of the compressed air, which switching device interrupts the compressed air supply line to a compressed air connection in the non-actuated state.
- a switching device in the sense of the invention is a device means by means of which the control system can be connected to a compressed air supply or the compressed air supply can be interrupted, with the switching device not being able to vent the air space. The switching device enables the function of the inlet valve to be checked via a diagnostic cycle.
- two or more separately controllable inlet valves can also be connected in parallel.
- the function of the inlet valves can be tested individually in a diagnostic cycle.
- the switching device can comprise an electrically actuatable pilot valve and a pneumatically actuatable pilot valve, the pilot valve being switchable via a control line connected to the compressed air connection in which the pilot valve is switched.
- the inlet valve, the outlet valve and the pilot valve can be designed as a 2/2-way valve and the pilot valve as a 3/2-way valve.
- a secondary outlet can be provided between the pilot control valve and the inlet valve, and a secondary line into which a secondary valve is connected can also be connected to the secondary connection.
- This secondary valve is preferably an electrically controllable 2/2 way valve which can also be switched by means of the control device.
- the auxiliary valve can be any external valve.
- control air system for providing compressed air with an adjustable air pressure in an air space, preferably for controlling the braking torque of a hydrodynamic retarder.
- the control air system has at least the basic structure described above construction (according to claim 1), wherein the method for checking the functional state of inlet valve and outlet valve comprises the following steps: simultaneous switching of the switching device in the compressed air supply line, from a closed position to an open position, and switching of the outlet valve to a closed position, whereby to check the Functional status of the valves
- the switching device is switched to the closed position, in which case a fault condition of the inlet valve and / or the switching device is deduced if the pressure detected or calculated at least indirectly by the sensor falls to a fixed pressure within a definable time interval , and
- the outlet valve is switched to the open position, in which case a fault condition of the outlet valve is deduced if the pressure detected or calculated at least indirectly by the sensor does not fall to the ambient pressure within a definable time interval.
- a secondary outlet can be provided between the pilot valve and the inlet valve, a secondary line being connected to the secondary connection into which a secondary valve is connected, with an intermediate step between the second and third to check the functional state of the secondary valve Step, with the switching device closed, the inlet valve is switched to the open position, it being possible to deduce an error state of the secondary valve if the pressure detected or calculated at least indirectly by the sensor falls below a definable minimum pressure within a definable time interval.
- Fig. 1 control air system with auxiliary valve Fig. 2 a possible advantageous diagnostic cycle
- the control air system 1 is controlled or regulated via an only indicated controller 12 or CPU, the electrically switchable valves 3, 5a, 5b, 6, 13 and the sensor 8 being connected to or switched by them. Furthermore, a secondary outlet A2 is provided, to which an external secondary valve 13 is connected, which can also be controlled via the control of the MRCU.
- valves 5a, b and 6 are switched to the basic position so that the air space 11 is vented via the outlet valve 6.
- a diagnosis must be carried out every time the vehicle is started. This is carried out when the vehicle ignition is switched on with the aim of running through the Diagnostic cycle pneumatic malfunctions can be recognized at the individual valves of the MRCU.
- the MRCU is also designed so that the correct functioning of the auxiliary valve 13 connected to the auxiliary outlet A2 can also be checked. Recognizing the function of the (external) secondary valve 13 is extremely advantageous for ensuring a further function on the overall product retarder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019134843.9A DE102019134843A1 (de) | 2019-12-18 | 2019-12-18 | Steuerluftsystem für einen hydrodynamischen Retarder |
PCT/EP2020/084033 WO2021121947A1 (de) | 2019-12-18 | 2020-12-01 | Steuerluftsystem und verfahren zur steuerung eines steuerluftsystems |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4077072A1 true EP4077072A1 (de) | 2022-10-26 |
Family
ID=73694997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20817273.4A Withdrawn EP4077072A1 (de) | 2019-12-18 | 2020-12-01 | Steuerluftsystem und verfahren zur steuerung eines steuerluftsystems |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4077072A1 (de) |
DE (1) | DE102019134843A1 (de) |
WO (1) | WO2021121947A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023046451A1 (de) * | 2021-09-24 | 2023-03-30 | Eto Magnetic Gmbh | Pneumatische steuervorrichtung für eine hydrodynamische bremse |
DE102022111889B3 (de) * | 2022-05-12 | 2023-07-20 | Norgren Gmbh | Steuerluftsystem für einen hydrodynamischen Retarder |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19929152A1 (de) * | 1999-06-25 | 2001-01-04 | Voith Turbo Kg | Ventileinrichtung zur Steuerung der Funktionsweise eines hydrodynamischen Retarders |
DE102011106522B3 (de) * | 2011-06-15 | 2012-10-25 | Voith Patent Gmbh | Steuerluftsystem und Verfahren zur Steuerung eines hydrodynamischen Retarders mittels einem solchen System |
DE102014201750A1 (de) * | 2014-01-31 | 2015-08-06 | Voith Patent Gmbh | Verfahren zur Überwachung eines Versorgungsdruckes in einem pneumatischen oder hydraulischen Drucksystem und Steuerluftsystem |
DE102017009954A1 (de) * | 2017-10-26 | 2019-05-02 | Wabco Gmbh | Achsventilmodul und Relaisventilmodul einer Druckluftbremsanlage |
-
2019
- 2019-12-18 DE DE102019134843.9A patent/DE102019134843A1/de not_active Withdrawn
-
2020
- 2020-12-01 WO PCT/EP2020/084033 patent/WO2021121947A1/de unknown
- 2020-12-01 EP EP20817273.4A patent/EP4077072A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
WO2021121947A1 (de) | 2021-06-24 |
DE102019134843A1 (de) | 2021-06-24 |
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Effective date: 20220718 |
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AK | Designated contracting states |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NORGREN GMBH Owner name: VOITH PATENT GMBH |
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Effective date: 20231220 |