EP2080914A2 - Pressure device for a vehicle - Google Patents
Pressure device for a vehicle Download PDFInfo
- Publication number
- EP2080914A2 EP2080914A2 EP08168578A EP08168578A EP2080914A2 EP 2080914 A2 EP2080914 A2 EP 2080914A2 EP 08168578 A EP08168578 A EP 08168578A EP 08168578 A EP08168578 A EP 08168578A EP 2080914 A2 EP2080914 A2 EP 2080914A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure medium
- dryer
- pressure
- vehicle according
- chamber
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 claims description 2
- 238000011161 development Methods 0.000 description 13
- 230000018109 developmental process Effects 0.000 description 13
- 238000013022 venting Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000002274 desiccant Substances 0.000 description 3
- 238000010981 drying operation Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 238000007605 air drying Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/048—Arrangements for compressed air preparation, e.g. comprising air driers, air condensers, filters, lubricators or pressure regulators
Definitions
- the invention relates to a pressure medium device of a vehicle having a pressure medium source, a pressure medium chamber, wherein the pressure medium source communicates with the pressure medium chamber via a first pressure medium line, and a dryer, which is arranged between the pressure medium source and the pressure medium chamber in the first pressure medium line.
- a pressure medium device of the type mentioned is from the DE3919438A1 known.
- the pressure fluid device known from this publication has a pressure medium source, an air spring as a consumer, a connecting line from the pressure medium source to the air spring and an adsorption dryer.
- the adsorption dryer When the air spring is acted upon by the pressure medium source with pressure medium, the adsorption dryer is operated in a drying operation. In this case, moisture is deposited from the pressure medium in a desiccant desorption dryer and stored. To empty the air spring, the adsorption dryer is flowed through in the opposite direction in the regeneration mode, with part of the moisture deposited on the desiccant being able to be discharged into the atmosphere via an outlet of the adsorption dryer.
- a disadvantage of the known device is that the operation of the dryer requires a drying operation and a regeneration operation and thus the pressure medium device can only be operated cyclically.
- a further disadvantage is that a filling process of an air spring may have to be interrupted due to the drying capacity of the dryer which is too low.
- a vehicle height adjusting device with a pressure medium source, a lifting device and a water separator, which is arranged in a connecting line between the pressure medium source and the lifting device.
- the water separator can be connected optionally to the atmosphere or the lifting device.
- the disadvantage of this device is that only a cyclical drying operation of the compressed air is made possible and the separated water is stored in the device. The stored water may cause damage to failure of the height adjuster.
- the air drying plant has two drying tanks, which alternately dry the compressed air flowing through them by means of a changeover or regenerate the desiccant with a portion of the dry compressed air.
- the disadvantage of this device is the large space requirement and the technical control effort of the air drying plant with two dryers and a switching system. Another disadvantage is that the moisture is stored in the drying containers.
- the object of the invention is to provide a suitable for a vehicle pressure fluid device that allows continuous operation and their space is low.
- the advantage of the invention lies in the fact that the one or more pressure medium container can be filled with pressure medium continuously and without interruption, so that any number of filling operations can be carried out without overloading the dryer with moisture.
- Another advantage is that at least one pressure medium chamber can be filled with a single dryer and at the same time the moisture can be removed from the dryer and thus from the system of the pressure medium device. It is also advantageous that no regeneration phase of the dryer is required, during which the pressure medium source is out of operation or can not promote into the pressure medium chambers.
- Another advantage is that little or no moisture or no water is stored in the dryer, but the moisture extracted from the pressure medium by the dryer during the filling process of the pressure medium chamber (s) can be discharged directly into the environment.
- Another advantage is that the filling process of the pressure medium chamber at any operating point, ie at any required pressure of the pressure medium chamber, can be performed while parallel and simultaneously the drying process is carried out by a part of the subsidized and dried pressure medium in the dryer and can be used to carry the moisture from the dryer to the atmosphere.
- the dryer has a vent port, via which a part of the conveyed pressure medium can be discharged into the environment in order to remove moisture from the dryer.
- the dryer has a vent space, which is connected via the vent port to the atmosphere, and wherein a second pressure medium line is connected to the vent space, which branches off from the first pressure medium line.
- the advantage of this development is the fact that the dryer has a pressure chamber and a vent space, which communicate with each other through a water-permeable or water-vapor-permeable separating layer.
- the pressure medium conveyed by the pressure medium source is conducted into the pressure chamber of the dryer, where at least part of the moisture of the pressure medium is transported by diffusion through the separating layer into the venting space of the dryer.
- the moisture in the venting chamber is discharged through pressure medium from the pressure chamber of the dryer via the venting port into the atmosphere.
- the advantage is that only a small part of the pressure medium from the pressure chamber of the dryer is transferred into the venting chamber of the dryer and finally via the vent port into the atmosphere.
- the other and larger part of the pressure medium can be used for filling at least one pressure chamber or the like.
- the second pressure medium line branches off from the first pressure medium line, wherein the branch point especially between the dryer and the pressure medium chamber is located.
- the second pressure medium line has a throttle.
- a portion of the moisture of the conveyed pressure medium by the return of the pressure medium source promoted and / or dried by the dryer pressure medium can be discharged into the environment.
- the advantage of this development is the fact that the moisture removed from the pressure medium by the dryer is discharged directly from the dryer by means of the subsidized and / or dried pressure medium into the environment.
- the proportion of the recirculated, funded by the pressure medium source and / or dried by the dryer pressure medium, which is deliverable to the environment is controllable and / or controllable.
- the proportion of the pressure medium conveyed and / or dried by the dryer, which is used for carrying out the moisture from the dryer into the environment can be regulated or controlled as a function of the ambient temperature, the ambient pressure and / or the ambient humidity. The higher the ambient temperature and / or the ambient humidity, the higher the proportion of the dried pressure medium for the execution of the humidity is to be selected in order to set the desired pressure dew point in the pressure medium chamber or the pressure medium device.
- the advantage of this development is the fact that the amount of pressure fluid used to fill the pressure fluid chamber can be adapted to the requirements of the necessary pressure dew point reduction in the pressure medium chamber, taking into account the ambient conditions.
- the Pressure fluid device is thus very efficient and can be adapted by the control and / or control exactly to the required pressure dew point reduction.
- control and / or control of the proportion of the recirculated, dried by the dryer pressure medium, which can be discharged into the environment, with a proportional valve is feasible.
- the advantage of this development is the fact that the control and / or control of the proportion of the recirculated, funded by the pressure medium source and / or dried by the dryer pressure medium, which can be discharged into the environment, cost feasible with simple means.
- the vent port can be blocked by a vent valve.
- the advantage of this development is that the vent port can be selectively opened and closed with a vent valve.
- the vent valve is controllable by the outlet pressure of the pressure medium source.
- the pressure medium source When operating the pressure medium source is in the outlet before an increased pressure, which is used to control the vent valve, so that the valve can always be opened during operation of the pressure medium source.
- the vent valve is controllable by the suction pressure of the pressure medium source.
- the vent valve is electrically controlled.
- the advantage of this development is the fact that the vent valve can be opened and closed independently of the operation of the pressure medium source.
- the pressure medium in the first pressure medium line can flow only in one direction from an outlet of the dryer in the direction of the pressure medium chamber.
- the FIG. 1 shows a schematic diagram of a pressure medium device 1, which is designed as an open level control system.
- the pressure medium device 1 includes a control unit 30, a compressor 2, an air dryer 10, two air spring 4a, 4b, a pressure accumulator 6 and a pressure sensor 20.
- the compressor 2 is arranged over a arranged in the first pressure medium line 8 air dryer 10 and a check valve 18 and a first and second solenoid valve 24a, 24b connected to the air springs 4a, 4b and via a pressure accumulator valve 26 to the accumulator 6.
- the solenoid valves 24a, 24b or 26 In order to discharge compressed air from the pressure medium device is one of the solenoid valves 24a, 24b or 26 to operate and at the same time to switch the exhaust valve 28, so that compressed air either from the air springs 4a, 4b or discharge the accumulator 6 through the filter 22 into the atmosphere.
- the pressure in the first pressure medium line 8 is measured by the pressure sensor 20, wherein the pressure value can be processed and stored by the control unit 30.
- the proportion of, during the filling of the pressure accumulator 6 discharged into the atmosphere, compressed air can be additionally controlled by a valve, such as a proportional valve 14.
- the valves 14, 16, 24a, 24b, 26, 28 are electrically controlled and controlled by the control unit 30.
- FIG. 2 shows a pressure fluid device 1, which only by the control of the exhaust valve 16 of the pressure medium device of FIG. 1 different.
- the exhaust valve 16 he FIG. 2 is driven by the pressure which exists between the compressor 2 and the air dryer inlet 10a. If this pressure exceeds a limit value, then the outlet valve 28 changes over to the second switching state (not shown) and switches the connection from the venting space 11 of the air dryer 10 to the venting connection 12.
- FIG. 3 shows a known per se closed pressure fluid device 1. Also in this closed pressure fluid device 1 is during the transfer of compressed air from the atmosphere through the compressor 2, via the air dryer 10 in the pressure accumulator 6 or one of the air springs 4a to 4d, a portion of the dried compressed air discharged from or behind the air dryer outlet 10b via the second pressure medium line 13 into the vent space 11 and from there via the then switched vent valve 16 to the vent port 12 into the atmosphere.
- FIG. 4 shows a further pressure medium device 1 with a compressor 2, an air dryer 10, a check valve 18, a first and second solenoid valve 24a, 24b and a first and second air spring 4a, 4b. Also in this pressure fluid device 1 is during the transfer of compressed air from the atmosphere through the filter 22, the suction line 9, through the compressor 2, via the air dryer 10 in one of the air springs 4a and / or 4b, a portion of the dried compressed air from or behind the air dryer outlet 10b discharged via the second pressure medium line 13 into the vent space 11 and from there via the then switched vent valve 16 via the vent line 12a to the vent port 12 into the atmosphere.
- the vent valve 16 is designed in this case as a 3/2-way valve with electrical control, wherein the electrical connection to the control unit of the pressure medium device 1 is not shown in detail. It is also possible to pneumatically actuate the vent valve 16, such as in Fig. 2 shown. In the first, shown switching state of the vent valve 16, the pressure line 8 is connected to the atmosphere.
- FIG. 5 11 shows a sectional view of an air dryer 10, which has an air dryer inlet 10a, an air dryer outlet 10b, a valve or a throttle 14, a second pressure line 13, a venting space 11 and a venting port 12.
- compressed air is transferred via the air dryer inlet 10a in the air dryer 10 and forwarded via the air dryer outlet 10b, then a portion of the dried compressed air via the valve or the throttle 14, which are arranged in the second pressure medium line 13, in the vent space 11 transferred and forwarded from there to the vent port.
- the part of the dried compressed air, which is transferred into the venting space 11, absorbs the moisture removed from the compressed air and transports it to the venting port 12 in the atmosphere.
- the humidity of the compressed air is transferred via a membrane in the dryer in the vent space.
- the valve 14 may be implemented as a proportional valve, throttle, check valve, or a combination thereof.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
Abstract
Description
Die Erfindung betrifft eine Druckmittelvorrichtung eines Fahrzeuges mit einer Druckmittelquelle, einer Druckmittelkammer, wobei die Druckmittelquelle mit der Druckmittelkammer über eine erste Druckmittelleitung in Verbindung steht, und einem Trockner, welcher zwischen der Druckmittelquelle und der Druckmittelkammer in der ersten Druckmittelleitung angeordnet ist.The invention relates to a pressure medium device of a vehicle having a pressure medium source, a pressure medium chamber, wherein the pressure medium source communicates with the pressure medium chamber via a first pressure medium line, and a dryer, which is arranged between the pressure medium source and the pressure medium chamber in the first pressure medium line.
Eine Druckmittelvorrichtung der eingangs genannten Art ist aus der
Aus der
Aus der
Aus der
Aufgabe der Erfindung ist es, eine für ein Fahrzeug geeignete Druckmittelvorrichtung zu schaffen, die einen kontinuierlichen Betrieb gestattet und deren Bauraum gering ist.The object of the invention is to provide a suitable for a vehicle pressure fluid device that allows continuous operation and their space is low.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. Bei der erfindungsgemäßen Druckmittelvorrichtung ist während der Befüllung einer Druckmittelkammer durch die Druckmittelquelle mindestens ein Teil der Feuchtigkeit des geförderten Druckmittels über den Trockner in die Umgebung abgebbar.This object is achieved by the features of
Der Vorteil der Erfindung ist darin zu sehen, dass der oder die Druckmittelbehälter kontinuierlich und ohne Unterbrechung mit Druckmittel befüllt werden kann bzw. können, so dass beliebig viele Füllvorgänge durchführbar sind, ohne den Trockner mit Feuchtigkeit zu überladen. Ein weiterer Vorteil ist, dass mit einem einzigen Trockner wenigstens eine Druckmittelkammer befüllt werden kann und gleichzeitig die Feuchtigkeit aus dem Trockner und somit aus dem System der Druckmittelvorrichtung abgeführt werden kann. Vorteilhaft ist auch, dass keine Regenerationsphase des Trockners erforderlich ist, währenddessen die Druckmittelquelle außer Betrieb ist bzw. nicht in die Druckmittelkammern fördern kann. Ein weiterer Vorteil ist, dass keine oder kaum Feuchtigkeit bzw. kein Wasser im Trockner gespeichert wird, sondern die durch den Trockner aus dem Druckmittel entzogene Feuchtigkeit während des Befüllvorgangs der Druckmittelkammer(n) direkt in die Umgebung abgegeben werden kann. Die Gefahr einer Beeinträchtigung der Druckmittelvorrichtung durch Feuchtigkeit bzw. Wasser in Form von Korrosion oder Einfrieren wird sicher verhindert. Ein weiterer Vorteil ist, dass der Befüllvorgang der Druckmittelkammer in jedem beliebigen Betriebspunkt, d.h. bei jedem geforderten Druck der Druckmittelkammer, durchgeführt werden kann, während parallel und gleichzeitig der Trocknungsvorgang durchgeführt wird, indem ein Teil des geförderten und getrockneten Druckmittels im Trockner zurückgeführt und zum Ausführen der Feuchtigkeit aus dem Trockner in die Atmosphäre verwendet werden kann.The advantage of the invention lies in the fact that the one or more pressure medium container can be filled with pressure medium continuously and without interruption, so that any number of filling operations can be carried out without overloading the dryer with moisture. Another advantage is that at least one pressure medium chamber can be filled with a single dryer and at the same time the moisture can be removed from the dryer and thus from the system of the pressure medium device. It is also advantageous that no regeneration phase of the dryer is required, during which the pressure medium source is out of operation or can not promote into the pressure medium chambers. Another advantage is that little or no moisture or no water is stored in the dryer, but the moisture extracted from the pressure medium by the dryer during the filling process of the pressure medium chamber (s) can be discharged directly into the environment. The risk of deterioration of the pressure medium device by moisture or water in the form of corrosion or freezing is reliably prevented. Another advantage is that the filling process of the pressure medium chamber at any operating point, ie at any required pressure of the pressure medium chamber, can be performed while parallel and simultaneously the drying process is carried out by a part of the subsidized and dried pressure medium in the dryer and can be used to carry the moisture from the dryer to the atmosphere.
Gemäß einer Weiterbildung der Erfindung nach Anspruch 2 ist vorgesehen, dass der Trockner einen Entlüftungsanschluss aufweist, über welchen ein Teil des geförderten Druckmittels in die Umgebung abgebbar ist, um Feuchtigkeit aus dem Trockner abzuführen. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass die dem Druckmittel durch den Trockner entzogene Feuchtigkeit direkt vom Trockner in die Umgebung abgegeben wird, womit lange Leitungswege eingespart werden. Ein weiterer Vorteil ist, dass das geförderte und getrocknete Druckmittel für das Ausführen der Feuchtigkeit aus dem Trockner in die Umgebung verwendbar ist.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 3 ist vorgesehen, dass der Trockner einen Entlüftungsraum aufweist, welcher über den Entlüftungsanschluss mit der Atmosphäre verbunden ist, und wobei eine zweite Druckmittelleitung mit dem Entlüftungsraum verbunden ist, welche von der ersten Druckmittelleitung abzweigt. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass der Trockner einen Druckraum und einen Entlüftungsraum aufweist, welche durch eine wasserdurchlässige bzw. wasserdampfdurchlässige Trennschicht miteinander in Verbindung stehen. Das von der Druckmittelquelle geförderte Druckmittel wird in den Druckraum des Trockners geleitet und dort wird zumindest ein Teil der Feuchtigkeit des Druckmittels durch Diffusion über die Trennschicht in den Entlüftungsraum des Trockners transportiert. Die Feuchtigkeit im Entlüftungsraum wird durch Druckmittel aus der Druckkammer des Trockners über den Entlüftungsanschluss in die Atmosphäre abgeführt. Der Vorteil besteht darin, dass nur ein geringer Teil des Druckmittels aus der Druckkammer des Trockners in die Entlüftungskammer des Trockners und schließlich über den Entlüftungsanschluss in die Atmosphäre überführt wird. Der andere und größere Teil des Druckmittels kann für Befüllung mindestens einer Druckkammer oder dgl. verwendet werden.According to one embodiment of the invention according to claim 3 it is provided that the dryer has a vent space, which is connected via the vent port to the atmosphere, and wherein a second pressure medium line is connected to the vent space, which branches off from the first pressure medium line. The advantage of this development is the fact that the dryer has a pressure chamber and a vent space, which communicate with each other through a water-permeable or water-vapor-permeable separating layer. The pressure medium conveyed by the pressure medium source is conducted into the pressure chamber of the dryer, where at least part of the moisture of the pressure medium is transported by diffusion through the separating layer into the venting space of the dryer. The moisture in the venting chamber is discharged through pressure medium from the pressure chamber of the dryer via the venting port into the atmosphere. The advantage is that only a small part of the pressure medium from the pressure chamber of the dryer is transferred into the venting chamber of the dryer and finally via the vent port into the atmosphere. The other and larger part of the pressure medium can be used for filling at least one pressure chamber or the like.
Gemäß einer Weiterbildung der Erfindung nach Anspruch 4 ist vorgesehen, dass die zweite Druckmittelleitung von der ersten Druckmittelleitung abzweigt, wobei der Abzweigpunkt insbesondere zwischen dem Trockner und der Druckmittelkammer liegt. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass ein geringer Teil des trockenen Druckmittels für das Ausführen der Feuchtigkeit in die Atmosphäre verwendet wird.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 5 ist vorgesehen, dass die zweite Druckmittelleitung eine Drossel aufweist. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass der Druck in der ersten Druckmittelleitung erhalten bleibt und der Druck in der Entlüftungskammer auf annähernd Atmosphärendruck abgesenkt werden kann.According to one embodiment of the invention according to claim 5, it is provided that the second pressure medium line has a throttle. The advantage of this development is the fact that the pressure in the first pressure medium line is maintained and the pressure in the venting chamber can be lowered to approximately atmospheric pressure.
Gemäß einer Weiterbildung der Erfindung nach Anspruch 6 ist vorgesehen, dass ein Teil der Feuchtigkeit des geförderten Druckmittels durch die Rückführung von der Druckmittelquelle geförderten und/oder durch den Trockner getrockneten Druckmittels in die Umgebung abgebbar ist. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass die dem Druckmittel durch den Trockner entzogene Feuchtigkeit direkt vom Trockner mittels des geförderten und/oder getrockneten Druckmittels in die Umgebung abgegeben wird.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 7 ist vorgesehen, dass der Anteil des rückgeführten, von der Druckmittelquelle geförderten und/oder durch den Trockner getrockneten Druckmittels, welches in die Umgebung abgebbar ist, regelbar und/oder steuerbar ist. Der Anteil des durch den Trockner geförderten und/oder getrockneten Druckmittels, welcher für das Ausführen der Feuchtigkeit aus dem Trockner in die Umgebung verwendet wird, kann in Abhängigkeit der Umgebungstemperatur, des Umgebungsdrucks und/oder der Umgebungsfeuchtigkeit geregelt oder gesteuert werden. Je höher die Umgebungstemperatur und/oder die Umgebungsfeuchtigkeit ist, desto höher ist der Anteil des getrockneten Druckmittels zur Ausführung der Feuchtigkeit zu wählen, um den gewünschten Drucktaupunkt in der Druckmittelkammer bzw. der Druckmittelvorrichtung einzustellen. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass die Menge des zur Befüllung der Druckmittelkammer verwendeten Druckmittels an die Erfordernisse der notwendigen Drucktaupunktabsenkung in der Druckmittelkammer unter Heranziehung der Umgebungsbedingungen anpassbar ist. Die Druckmittelvorrichtung ist somit sehr effizient einsetzbar und durch die Regelung und/oder Steuerung genau auf die erforderliche Drucktaupunktabsenkung anpassbar.According to one embodiment of the invention according to claim 7, it is provided that the proportion of the recirculated, funded by the pressure medium source and / or dried by the dryer pressure medium, which is deliverable to the environment, is controllable and / or controllable. The proportion of the pressure medium conveyed and / or dried by the dryer, which is used for carrying out the moisture from the dryer into the environment, can be regulated or controlled as a function of the ambient temperature, the ambient pressure and / or the ambient humidity. The higher the ambient temperature and / or the ambient humidity, the higher the proportion of the dried pressure medium for the execution of the humidity is to be selected in order to set the desired pressure dew point in the pressure medium chamber or the pressure medium device. The advantage of this development is the fact that the amount of pressure fluid used to fill the pressure fluid chamber can be adapted to the requirements of the necessary pressure dew point reduction in the pressure medium chamber, taking into account the ambient conditions. The Pressure fluid device is thus very efficient and can be adapted by the control and / or control exactly to the required pressure dew point reduction.
Gemäß einer Weiterbildung der Erfindung nach Anspruch 8 ist vorgesehen, dass die Regelung und/oder Steuerung des Anteils des rückgeführten, durch den Trockner getrockneten Druckmittels, welcher in die Umgebung abgebbar ist, mit einem Proportionalventil durchführbar ist. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass die Regelung und/oder Steuerung des Anteils des rückgeführten, von der Druckmittelquelle geförderten und/oder durch den Trockner getrockneten Druckmittels, welcher in die Umgebung abgebbar ist, kostengünstig mit einfachen Mittel durchführbar ist.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 9 ist vorgesehen, dass der Entlüftungsanschluss durch ein Entlüftungsventil sperrbar ist. Der Vorteil dieser Weiterbildung besteht darin, dass der Entlüftungsanschluss mit einem Entlüftungsventil gezielt geöffnet und geschlossen werden kann.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 10 ist vorgesehen, dass das Entlüftungsventil durch Druckmittel steuerbar ist. Der Vorteil dieser Weiterbildung besteht darin, dass die Ansteuerung des Entlüftungsventils durch Druckmittel erfolgt, welches der Druckmittelvorrichtung entnommen werden kann, was einfach und kostengünstig durchführbar ist.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 11 ist vorgesehen, dass das Entlüftungsventil durch den Auslassdruck der Druckmittelquelle steuerbar ist. Bei Betrieb der Druckmittelquelle liegt im Auslass ein erhöhter Druck vor, welcher zur Ansteuerung des Entlüftungsventils verwendbar ist, so dass das Ventil immer während des Betriebs der Druckmittelquelle geöffnet werden kann.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 12 ist vorgesehen, dass das Entlüftungsventil durch den Ansaugdruck der Druckmittelquelle steuerbar ist. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass die Druckmittelvorrichtung im Betrieb einen Unterdruck im Einlassbereich erzeugt. Dieser Unterdruck ist zur Ansteuerung des Entlüftungsventils während des Betriebs der Druckmittelquelle verwendbar.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 13 ist vorgesehen, dass das Entlüftungsventil elektrisch steuerbar ist. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass das Entlüftungsventil auch unabhängig vom Betrieb der Druckmittelquelle geöffnet und geschlossen werden kann.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 14 ist vorgesehen, dass das Druckmittel in der ersten Druckmittelleitung nur in der einen Richtung von einem Ausgang des Trockners in Richtung der Druckmittelkammer strömen kann. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass kein Druckmittel aus einer Druckmittelkammer über den Trockner in die Umgebung abgegeben wird.According to one embodiment of the invention according to
Gemäß einer Weiterbildung der Erfindung nach Anspruch 15 ist vorgesehen, dass in der ersten Druckmittelleitung zwischen dem Trockner und der Druckmittelkammer ein Ventil angeordnet ist, welches die erste Durchflussrichtung des Druckmittels vom Trockner zur Druckmittelkammer freigibt und die zweite Durchflussrichtung von der Druckmittelkammer zum Trockner sperrt. Der Vorteil dieser Weiterbildung ist darin zu sehen, dass nur die eine Durchflussrichtung des Druckmittels vom Trockner zur Druckmittelkammer einfach, sicher und kostengünstig mittels beispielsweise eines Rückschlagventils oder eines Magnetventils festlegbar ist.According to one embodiment of the invention according to claim 15, it is provided that in the first pressure medium line between the dryer and the pressure medium chamber, a valve is arranged, which releases the first flow direction of the pressure medium from the dryer to the pressure medium chamber and blocks the second flow direction of the pressure medium chamber to the dryer. The advantage of this development is the fact that only one flow direction of the pressure medium from the dryer to the pressure medium chamber is simple, safe and inexpensive by means of, for example, a check valve or a solenoid valve can be fixed.
Ausführungsbeispiele und weitere Vorteile der Erfindung werden im Zusammenhang mit den nachstehenden Figuren erläutert, darin zeigen:
- Fig. 1
- ein erstes schematisches Schaltbild einer offenen Niveauregelanlage,
- Fig. 2
- ein zweites schematisches Schaltbild einer offenen Niveauregelanlage,
- Fig. 3
- ein schematisches Schaltbild einer geschlossenen Niveauregelanlage,
- Fig. 4
- ein schematisches Schaltbild einer Ablassschaltung einer Niveauregelanlage,
- Fig. 5
- Trockner -Schnittzeichnung.
- Fig. 1
- a first schematic diagram of an open level control system,
- Fig. 2
- a second schematic diagram of an open level control system,
- Fig. 3
- a schematic diagram of a closed level control system,
- Fig. 4
- a schematic diagram of a discharge circuit of a level control system,
- Fig. 5
- Dryer cut-to-size.
Die
Um den Druck in dem Druckspeicher 6 zu erhöhen, wird Luft aus der Atmosphäre über den Filter 22, die Ansaugleitung 9, den Kompressor 2, den Lufttrockner 10, das Rückschlagventil 18, die Druckmittelleitung 8, das Druckspeicherventil 26 in den Druckspeicher 6 überführt. Entsprechendes gilt für die Befüllung der Luftfedern 4a, 4b mittels des Kompressors 2 direkt aus der Atmosphäre. Während der Befüllung des Druckspeichers 6 oder der Luftfedern 4a, 4b wird ein Teil der bereits vom Lufttrockner 10 getrockneten Druckluft über die zweite Druckmittelleitung 13, den Entlüftungsraum 11, das geschaltete Entlüftungsventil 16 und den Entlüftungsanschluss 12 in die Atmosphäre abgelassen. Dabei wird ein Teil der Druckluft von dem Lufttrockner-Auslass 10b zu dem Entlüftungsraum 11 geleitet. Wie in dem Beispiel der
Die
Die
Die
Die
- 1 -1 -
- DruckmittelvorrichtungPressure medium device
- 2 -2 -
- Kompressorcompressor
- 4a -4a -
- erste Luftfederfirst air spring
- 4b -4b -
- zweite Luftfedersecond air spring
- 4c -4c -
- dritte Luftfederthird air spring
- 4d -4d -
- vierte Luftfederfourth air spring
- 6 -6 -
- Druckspeicheraccumulator
- 8 -8th -
- erste Druckmittelleitungfirst pressure medium line
- 9 -9 -
- Ansaugleitungsuction
- 10 -10 -
- Trocknerdryer
- 10a -10a -
- Trockner-EinlassDryer inlet
- 10b -10b -
- Trockner-AuslassDrier outlet
- 11 -11 -
- Entlüftungsraumvent space
- 12 -12 -
- Entlüftungsanschlussexhaust port
- 12a -12a -
- Entlüftungsleitungvent line
- 13 -13 -
- zweite Druckmittelleitungsecond pressure medium line
- 14 -14 -
- Proportionalventilproportional valve
- 16 -16 -
- Entlüftungsventilvent valve
- 18 -18 -
- Rückschlagventilcheck valve
- 20 -20 -
- Drucksensorpressure sensor
- 22 -22 -
- Filterfilter
- 24a -24a -
- erstes Magnetventilfirst solenoid valve
- 24b -24b -
- zweites Magnetventilsecond solenoid valve
- 24c -24c -
- drittes Magnetventilthird solenoid valve
- 24d -24d -
- viertes Magnetventilfourth solenoid valve
- 26 -26 -
- DruckspeicherventilAccumulator valve
- 27a -27a -
- erstes Umschaltventilfirst changeover valve
- 27b -27b -
- zweites Umschaltventilsecond changeover valve
- 28 -28 -
- Auslassventiloutlet valve
- 30 -30 -
- Steuereinheitcontrol unit
Claims (15)
während der Befüllung mindestens einer Druckmittelkammer (4a, 4b, 4c, 4d, 6) durch die Druckmittelquelle (2) ein Teil der Feuchtigkeit des geförderten Druckmittels über den Trockner (10) in die Umgebung abgebbar ist.Pressure medium device (1) of a vehicle having a pressure medium source (2), a pressure medium chamber (4a, 4b, 4c, 4d, 6), wherein the pressure medium source (2) with the pressure medium chamber (4a, 4b, 4c, 4d, 6) via a first Pressure medium line (8) is in communication, and a dryer (10) which is arranged between the pressure medium source (2) and the pressure medium chamber (4a, 4b, 4c, 4d, 6) in the first pressure medium line (8), characterized in that
during the filling of at least one pressure medium chamber (4a, 4b, 4c, 4d, 6) by the pressure medium source (2) a part of the moisture of the conveyed pressure medium via the dryer (10) can be discharged into the environment.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008004950A DE102008004950A1 (en) | 2008-01-18 | 2008-01-18 | Pressure medium device of a vehicle |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2080914A2 true EP2080914A2 (en) | 2009-07-22 |
EP2080914A3 EP2080914A3 (en) | 2012-08-15 |
EP2080914B1 EP2080914B1 (en) | 2014-06-11 |
Family
ID=40521531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08168578.6A Not-in-force EP2080914B1 (en) | 2008-01-18 | 2008-11-07 | Pressure device for a vehicle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2080914B1 (en) |
DE (1) | DE102008004950A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010086038A1 (en) * | 2009-01-28 | 2010-08-05 | Continental Aktiengesellschaft | Method for controlling the regeneration cycles for an air dryer in a closed ride control system for vehicles |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010011571B4 (en) * | 2010-03-16 | 2023-01-19 | Zf Cv Systems Hannover Gmbh | Air dryer device and method for operating an air dryer device |
DE102019130837B3 (en) * | 2019-11-15 | 2021-04-01 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for regenerating a dryer of an air suspension system of an electric vehicle and an air suspension system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3015071A1 (en) | 1979-04-19 | 1980-10-30 | Tokico Ltd | VEHICLE HEIGHT ADJUSTMENT |
DE3231519A1 (en) | 1982-08-25 | 1984-03-01 | Robert Bosch Gmbh, 7000 Stuttgart | Compressed air production system |
DE3919438A1 (en) | 1989-06-14 | 1990-12-20 | Wabco Westinghouse Fahrzeug | Auxiliary low pressure air regenerating air dryer - is supplied from emptying consumer unit to intermediate balancing container |
EP1536959B1 (en) | 2002-09-02 | 2007-05-02 | WABCO GmbH | Pneumatic spring system for a vehicle |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109196U (en) * | 1979-01-25 | 1980-07-31 | ||
JPS5913137Y2 (en) * | 1979-08-20 | 1984-04-19 | トキコ株式会社 | vehicle height adjustment device |
GB8422444D0 (en) * | 1984-09-05 | 1984-10-10 | Dowty Fuel Syst Ltd | Pure-air generator |
-
2008
- 2008-01-18 DE DE102008004950A patent/DE102008004950A1/en not_active Withdrawn
- 2008-11-07 EP EP08168578.6A patent/EP2080914B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3015071A1 (en) | 1979-04-19 | 1980-10-30 | Tokico Ltd | VEHICLE HEIGHT ADJUSTMENT |
DE3231519A1 (en) | 1982-08-25 | 1984-03-01 | Robert Bosch Gmbh, 7000 Stuttgart | Compressed air production system |
DE3919438A1 (en) | 1989-06-14 | 1990-12-20 | Wabco Westinghouse Fahrzeug | Auxiliary low pressure air regenerating air dryer - is supplied from emptying consumer unit to intermediate balancing container |
EP1536959B1 (en) | 2002-09-02 | 2007-05-02 | WABCO GmbH | Pneumatic spring system for a vehicle |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010086038A1 (en) * | 2009-01-28 | 2010-08-05 | Continental Aktiengesellschaft | Method for controlling the regeneration cycles for an air dryer in a closed ride control system for vehicles |
US8490991B2 (en) | 2009-01-28 | 2013-07-23 | Continental Teves Ag & Co Ohg | Method for controlling the regeneration cycles for an air dryer in a closed ride control system for vehicles |
Also Published As
Publication number | Publication date |
---|---|
DE102008004950A1 (en) | 2009-07-23 |
EP2080914A3 (en) | 2012-08-15 |
EP2080914B1 (en) | 2014-06-11 |
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