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DE4004482A1 - Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer - Google Patents

Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer

Info

Publication number
DE4004482A1
DE4004482A1 DE4004482A DE4004482A DE4004482A1 DE 4004482 A1 DE4004482 A1 DE 4004482A1 DE 4004482 A DE4004482 A DE 4004482A DE 4004482 A DE4004482 A DE 4004482A DE 4004482 A1 DE4004482 A1 DE 4004482A1
Authority
DE
Germany
Prior art keywords
dryer
compressed air
compressor
air dryer
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Withdrawn
Application number
DE4004482A
Other languages
German (de)
Inventor
Siegfried Ing Grad Mayer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE4004482A priority Critical patent/DE4004482A1/en
Priority to ITMI910280A priority patent/IT1247831B/en
Priority to FR9101453A priority patent/FR2658251B1/en
Priority to JP3018797A priority patent/JPH04219114A/en
Publication of DE4004482A1 publication Critical patent/DE4004482A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04Special measures taken in connection with the properties of the fluid
    • F15B21/041Removal or measurement of solid or liquid contamination, e.g. filtering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002Air treatment devices
    • B60T17/004Draining and drying devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Drying Of Gases (AREA)
  • Compressor (AREA)

Abstract

Compressed air for activating devices in pneumatic systems e.g. brake cylinders (17,18) for a vehicle derivs from a motor-driven compressor (10) with the compressed air passing through a dryer (13) for delivery along feed lines (12,16) to the devices. Between the dryer and the devices the air is fed via. multi-way valves e.g. a pair of similar 3/2 way valves arranged in sequence. In one partic. setting of the first valve, air from the compressor and the dryer is discharged directly into the atmos. taking moisture collected by the dryer while regenerating the dryer. The second valve continues operating to supply the cylinders. ADVANTAGE - Effective regeneration is performed at correct intervals.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Schaltungseinrichtung zur Regeneration eines Luftrockners nach der Gattung des Hauptanspruchs. In Pneumatiksystemen, speziell in der Kraftfahrzeug-Pneumatik, werden regenerierbare Trockner eingesetzt, um ein Vereisen der Stellelemente und Korrosion zu vermeiden. Das Trockenmittel muß durch eine entsprechende Schalteinrichtung regelmäßig regeniert werden. Bekannte Schalteinrichtungen benötigen für diesen Zweck eine verhältnismäßig große Anzahl von Ventilen. Außerdem steht zur Trockenmittel-Regenerierung nur das im System vorhandene Luftvolumen zur Verfügung.The invention relates to a circuit device Regeneration of an air dryer according to the genus of the main claim. In pneumatic systems, especially in automotive pneumatics, regenerable dryers are used to freeze the Avoid control elements and corrosion. The desiccant must regularly regenerated by an appropriate switching device will. Known switching devices require one for this purpose relatively large number of valves. Also stands for Desiccant regeneration only the air volume in the system to disposal.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Schalteinrichtung zur Regeneration eines Lufttrockners mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß es mit vertretbarem Aufwand möglich ist, den Trockner bedarfsgerecht zu regenieren, indem die Verdichterlaufzeit zur Regenerierung des Trockners durch ent­ sprechende Sensoren gesteuert wird. The switching device according to the invention for the regeneration of a Air dryer with the characteristic features of the main claim has the advantage that it is reasonable it is possible to regenerate the dryer as needed by using the Compressor run time for regeneration of the dryer by ent speaking sensors is controlled.  

Weitere Vorteile der Erfindung ergeben sich aus den Unteransprüchen, der nachfolgenden Beschreibung und Zeichnung.Further advantages of the invention result from the subclaims, the following description and drawing.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der nachfolgenden Beschreibung und Zeichnung widergegeben. Letztere zeigt zwei Aus­ führungsbeispiele von Schalteinrichtungen in schematischer Dar­ stellung.Two embodiments of the invention are in the following Description and drawing reproduced. The latter shows two offs examples of switching devices in schematic Dar position.

Beschreibung der ErfindungsbeispieleDescription of the invention examples

In Fig. 1 ist mit 10 ein Verdichter bezeichnet, der von einer Antriebsmaschine 11 angetrieben ist. An den Verdichter ist eine Druckleitung 12 angeschlossen, die in einen Trockner 13 eindringt, dann weiterführt zu einem 3/2-Wegeventil 14 mit den Schaltstellungen I und II und dann weiter zu einem 3/2-Wegeventil 15 ebenfalls mit den Schaltstellungen I und II. Vom Wegeventil 15 führt die Druck­ leitung 12 zu Verbrauchern, außerdem ist an das Wegeventil 15 noch eine zweite Druckleitung 16 angeschlossen, die ebenfalls zu Ver­ brauchern führt. Dies können Druckluftzylinder 17, 18 sein, denen Steuerventile 19, 20 zugeordnet. Die Wegeventile 14, 15 sind elektromagnetisch betätigbar.In Fig. 1, 10 denotes a compressor which is driven by a prime mover 11 . A pressure line 12 is connected to the compressor, which penetrates into a dryer 13 , then continues to a 3/2-way valve 14 with the switching positions I and II and then further to a 3/2-way valve 15 likewise with the switching positions I and II From the directional control valve 15 , the pressure line 12 leads to consumers, and a second pressure line 16 is also connected to the directional control valve 15 , which also leads to consumers. These can be compressed air cylinders 17 , 18 to which control valves 19 , 20 are assigned. The directional control valves 14 , 15 can be actuated electromagnetically.

Bei dem Trockner 13 handelt es sich um einen regenierbaren, wodurch ein Vereisen der Verbraucher und Korrosion vermieden wird. Das Trockenmittel im Trockner muß durch eine entsprechende Druckluft­ schaltung regelmäßig regeneriert werden. Dies geschieht im Aus­ führungsbeispiel nach Fig. 1 dadurch, daß zum Regenerieren das Wegeventil 14 in Schaltstellung II gebracht wird, so daß die durch den Trockner fließende Luft frei ausgeblasen wird. Dabei wird die im Trockenmittel enthaltene Feuchtigkeit mitgeführt, welche durch die zuvor geförderte, verdichtete Luft sich im Verdichter angesammelt hat. The dryer 13 is a regenerable one, which prevents icing up of the consumer and corrosion. The desiccant in the dryer must be regularly regenerated by an appropriate compressed air circuit. This is done in the off operation example of FIG. 1 in that for regenerating the directional control valve 14 is brought in the switching position II, so that the current flowing through the drying air is freely blown out. The moisture contained in the desiccant is carried along, which has accumulated in the compressor due to the previously conveyed, compressed air.

Das elektromagnetisch betätigbare 3/2-Wegeventil 15 dient zur Verteilung der Druckluft zu den Verbraucherleitungen.The electromagnetically actuated 3/2-way valve 15 is used to distribute the compressed air to the consumer lines.

Beim Ausführungsbeispiel nach Fig. 2 ist in der Druckleitung 12 vor dem Verdichter 10 ein elektromagnetisch betätigbares 3/2-Wegeventil mit den Schaltstellungen I und II angeordnet. Hinter dem Trockner ist in der Druckleitung 12 ebenfalls ein elektromagnetisch betätig­ bares 3/2-Wegeventil 23 angeordnet, und zwar noch vor dem Trockner 13. Von der Druckleitung 12 geht hinter dem Trockner 13 eine Leitung 24 aus, die zum Wegeventil 22 zurückführt. Hinter der Mündungsstelle befindet sich in der Druckleitung 12 ein Rückschlagventil 25, das sich vom Trockner in Richtung zu den Verbrauchern zu öffnen vermag.In the embodiment according to FIG. 2, an electromagnetically actuable 3/2-way valve with the switching positions I and II is arranged in the pressure line 12 upstream of the compressor 10 . An electromagnetically operable 3/2-way valve 23 is also arranged downstream of the dryer in the pressure line 12 , specifically before the dryer 13 . A line 24 , which leads back to the directional control valve 22 , extends from the pressure line 12 behind the dryer 13 . A check valve 25 is located behind the mouth in the pressure line 12 and can be opened from the dryer in the direction of the consumers.

Mit diesem Ausführungsbeispiel ist es möglich, den Trockner 13 mit der Saugseite des Verdichters 10 zu verbinden. Dies ist dann der Fall, wenn das Wegeventil 22 in Schaltstellung II steht. Steht das Wegeventil 23 ebenfalls in Schaltstellung II, dann wird über die Leitung 24 und das Wegeventil 22 im Trockner 13 ein Unterdruck erzeugt, mit dessen Hilfe eine wesentlich effektivere und schnellere Regenerierung des Trockners 13 erreicht wird.With this embodiment it is possible to connect the dryer 13 to the suction side of the compressor 10 . This is the case when the directional valve 22 is in switch position II. If the directional control valve 23 is also in switch position II, then a vacuum is generated in the dryer 13 via the line 24 and the directional control valve 22 , with the aid of which a substantially more effective and faster regeneration of the dryer 13 is achieved.

Claims (4)

1. Schalteinrichtung zur Regeneration eines Lufttrockners (13) in einem Pneumatiksystem, wobei der Lufttrockner dem Verdichter (10) nachgeschaltet ist und beide hintereinander an der Druckluftleitung (12) liegen, und mit wenigstens einem Wegeventil zur Steuerung des Luftstroms durch den Lufttrockner unter Herstellung einer Verbindung vom Verdichter zum Verbraucher, dadurch gekennzeichnet, daß dem Lufttrockner (13) ein Mehrwegeventil (14) nachgeschaltet ist mit einer Schaltstellung (II), in welcher Verbindung hergestellt ist vom Verdichter (10) über den Lufttrockner (13) zur Atmosphäre.1. Switching device for the regeneration of an air dryer ( 13 ) in a pneumatic system, the air dryer being connected downstream of the compressor ( 10 ) and both lying one behind the other on the compressed air line ( 12 ), and with at least one directional control valve for controlling the air flow through the air dryer to produce one Connection from the compressor to the consumer, characterized in that the air dryer ( 13 ) is followed by a multi-way valve ( 14 ) with a switch position (II), in which connection is made from the compressor ( 10 ) via the air dryer ( 13 ) to the atmosphere. 2. Schalteinrichtung zur Regeneration eines Lufttrockners nach dem Oberbegriff des Anspruchs 1, dadurch gekennzeichnet, daß zwischen dem Verdichter (10) und dem Lufttrockner (13) ein erstes Mehrwege­ ventil (23) angeordnet ist mit einer Schaltstellung (II), in welcher eine Verbindung vom Verdichter zur Atmosphäre besteht und daß dem Verdichter ein Mehrwegeventil (22) vorgeschaltet ist, durch das eine Verbindung von der Druckluftleitung (12) stromabwärts des Luft­ trockners über das erste Mehrwegeventil (23) zum Einlaß des Ver­ dichters herstellbar ist, und daß stromabwärts der Abzweigung dieser Verbindung ein Rückschlagventil (25) angeordnet ist, das sich in Richtung vom Lufttrockner zu den Verbrauchern zu öffnen vermag. 2. Switching device for the regeneration of an air dryer according to the preamble of claim 1, characterized in that between the compressor ( 10 ) and the air dryer ( 13 ) a first multi-way valve ( 23 ) is arranged with a switching position (II) in which a connection from the compressor to the atmosphere and that the compressor is a multi-way valve ( 22 ) upstream, through which a connection from the compressed air line ( 12 ) downstream of the air dryer via the first multi-way valve ( 23 ) to the inlet of the United poet can be produced, and that downstream of the A check valve ( 25 ) is arranged at the junction of this connection and can open in the direction from the air dryer to the consumers. 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Mehrwegeventile 3/2-Wegeventile sind.3. Device according to claim 1 or 2, characterized in that the multi-way valves are 3/2-way valves. 4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Mehrwegeventile elektromagnetisch betätigbar und mittels eines Programms steuerbar sind.4. Device according to claim 3, characterized in that the Multi-way valves can be operated electromagnetically and by means of a Program are controllable.
DE4004482A 1990-02-14 1990-02-14 Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer Withdrawn DE4004482A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE4004482A DE4004482A1 (en) 1990-02-14 1990-02-14 Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer
ITMI910280A IT1247831B (en) 1990-02-14 1991-02-05 MANEUVERING DEVICE TO REGENERATE AN AIR DRYER
FR9101453A FR2658251B1 (en) 1990-02-14 1991-02-08 CONNECTION DEVICE FOR THE REGENERATION OF AN AIR DRYER, PARTICULARLY FOR MOTOR VEHICLES.
JP3018797A JPH04219114A (en) 1990-02-14 1991-02-12 Changeover device for regenerating air drier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4004482A DE4004482A1 (en) 1990-02-14 1990-02-14 Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer

Publications (1)

Publication Number Publication Date
DE4004482A1 true DE4004482A1 (en) 1991-08-22

Family

ID=6400088

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4004482A Withdrawn DE4004482A1 (en) 1990-02-14 1990-02-14 Periodically regeneration compressed air dryer in pneumatic system - by valve controlled air passage venting compressed air directly to atmos. via dryer

Country Status (4)

Country Link
JP (1) JPH04219114A (en)
DE (1) DE4004482A1 (en)
FR (1) FR2658251B1 (en)
IT (1) IT1247831B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024475A1 (en) * 2002-09-02 2004-03-25 Wabco Gmbh & Co. Ohg Pneumatic suspension system for a vehicle
US7441789B2 (en) 2002-09-02 2008-10-28 Wabco Gmbh & Co. Ohg Pneumatic suspension system for a vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19515895A1 (en) * 1995-04-29 1996-10-31 Bosch Gmbh Robert Compressed air supply device for vehicle compressed air systems and method for controlling the compressed air supply device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961862A (en) * 1975-04-24 1976-06-08 Gardner-Denver Company Compressor control system
DE3139682A1 (en) * 1981-10-06 1983-05-05 Robert Bosch Gmbh, 7000 Stuttgart Air-drying device for compressed air system
DE3242336A1 (en) * 1982-11-16 1983-10-27 Daimler-Benz Ag, 7000 Stuttgart Compressed-air preparation device for a compressed-air supply system for compressed-air units
DE3308547A1 (en) * 1983-03-10 1984-09-13 Robert Bosch Gmbh, 7000 Stuttgart COMPRESSED AIR SUPPLY DEVICE FOR COMPRESSED AIR SYSTEMS
DE3605365A1 (en) * 1986-02-20 1987-08-27 Bosch Gmbh Robert Air-drying arrangement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004024475A1 (en) * 2002-09-02 2004-03-25 Wabco Gmbh & Co. Ohg Pneumatic suspension system for a vehicle
US7441789B2 (en) 2002-09-02 2008-10-28 Wabco Gmbh & Co. Ohg Pneumatic suspension system for a vehicle
US7484747B2 (en) 2002-09-02 2009-02-03 Wabco Gmbh Pneumatic suspension system for a vehicle

Also Published As

Publication number Publication date
ITMI910280A0 (en) 1991-02-05
ITMI910280A1 (en) 1992-08-05
JPH04219114A (en) 1992-08-10
FR2658251B1 (en) 1993-06-11
FR2658251A1 (en) 1991-08-16
IT1247831B (en) 1995-01-02

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