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EP1375919B1 - Compressor, especially for an air spring system for a vehicle - Google Patents

Compressor, especially for an air spring system for a vehicle Download PDF

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Publication number
EP1375919B1
EP1375919B1 EP03013762A EP03013762A EP1375919B1 EP 1375919 B1 EP1375919 B1 EP 1375919B1 EP 03013762 A EP03013762 A EP 03013762A EP 03013762 A EP03013762 A EP 03013762A EP 1375919 B1 EP1375919 B1 EP 1375919B1
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EP
European Patent Office
Prior art keywords
piston
compressor according
annular space
housing
compressor
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.)
Expired - Lifetime
Application number
EP03013762A
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German (de)
French (fr)
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EP1375919A1 (en
Inventor
Arnold Müller
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.)
Arnold Mueller & Co KG GmbH
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Arnold Mueller & Co KG GmbH
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Publication of EP1375919A1 publication Critical patent/EP1375919A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston

Definitions

  • the invention relates to a compressor, in particular for a Automotive air spring system, having the features in the preamble of the claim 1.
  • the invention has for its object to provide a compressor, in particular for a motor vehicle air spring system, in particular for a closed air spring system is suitable and existing back pressures always starting from any position can with self-priming in all areas.
  • the drawing shows a schematic Cutting a part of a drive motor, compressor and air dryer existing compressed air unit.
  • the compressed air unit 10 shown in the drawing has a schematic only indicated high-power electric motor 11 and a compressor 12, which are assembled into a unit. Part of this unit is further an only schematically indicated air dryer 13, in another, not also shown embodiment can be omitted.
  • the air dryer 13 extends in a space-saving manner above the motor 11 and extends to this approximately parallel, the transverse distance between the two being small.
  • the air dryer 13 with its housing directly to the Housing 14 of the compressor 12 attached.
  • the compressed air unit 10 is in particular for a motor vehicle air spring system determined, and here preferably for a closed air spring system.
  • a closed air spring system requires that within the system a pressure increase is made possible. This can mean that the pressures in the system of e.g. 2 to 10 bar can be increased must be set to e.g. 8 to 18 bar or even 20 bar or more.
  • the compressor 12 has in the housing 14 a cylinder chamber 15 in which a Piston 16 is tight and reciprocated.
  • a Piston 16 is tight and reciprocated.
  • the piston 16 closes with its upper end side 17 in the drawing together with the local area of the housing 14 a compression space 18, in which compressed air is compressed.
  • the compressed air is in the suction phase of on the outside via a supply line 19 and an opening 20 in the housing 14th sucked.
  • the compression space 18 has at least one outlet opening 21 which is closed by means of an outlet member 22, which can be opened, wherein the at least one outlet opening 21 and its outlet member 22 to the air dryer 13 open. Shown is also a further outlet opening 23 with Outlet 24 and connected discharge line 25, a compressed air outlet without air dryer 13 form.
  • the respective outlet member 22 and 24 consists of a pressure relief valve, which controls the pressure in the compression space 18 and is set so that it opens only when a set pressure is reached.
  • the at least one piston 16 is driven by a connecting rod 26, the by means of a bearing 27 on an eccentric portion 28 at the end of the motor shaft 29 of the motor 11 is rotatably mounted.
  • a balancing mass 30 attached to counterbalance.
  • another balancing mass 31st also be appropriate for mass balance.
  • the piston 16 is connected to the Connecting rod 26 movable via a transversely extending piston pin 32nd connected.
  • the compression space 18 has at least one arranged in the piston 16 Inlet opening 33, which is closed by an inlet member 34 is, which can be opened.
  • the inlet member 34 is indicated only schematically and consists e.g. out a conventional flutter valve with a movable plate as a valve member. It's on Piston 16 is mounted centrally and in the region of the piston end face 17, wherein the Inlet member 34 at a compression in the compression chamber 18 automatically closed while it is in the suction phase under this suction pressure opens automatically.
  • the at least one inlet opening 33 in the piston 16 is over at least one guided by the piston 16 channel 35 with sucked air can be fed.
  • annular space 36 is available the channel 35 in connection.
  • annular space 36 instead in the cylindrical housing 14th educated.
  • the piston 16 peripherally an annular groove 37.
  • the axial dimension of the annular space 36, in particular the annular groove 37, is selected as a function of the lifting height of the piston 16.
  • the radial Depth of the annular space 36, in particular the annular groove 37, is dependent on desired delivery volume selected.
  • the piston 16 has two in the axial direction of this distance mutually arranged, the annular space 36 sealing piston rings 38 and 39, e.g. plastic, on. Further, the piston 16 carries guide rings 40, 41, the preferably also may be made of plastic.
  • the channel 35 has a center in the piston 16 and extending to the inlet opening 33 leading central channel 42 and at least one connecting channel 43, the central channel 42 with the annular space 36, in particular the annular groove 37, connects.
  • the central channel 42 is formed as an axial bore, which is centered by the piston 16 and thereby only over a part of its axial dimension, extends and which is open only to the inlet opening 33, while the other, the Piston pin 32 facing the end of the piston 16 is closed.
  • the at least one connection channel 43 is e.g. as a transverse bore in the piston 16 educated. It is understood that also several radial transverse bores This type can be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Description

Die Erfindung bezieht sich auf einen Kompressor, insbesondere für ein Kraftfahrzeug-Luftfedersystem, mit den Merkmalen im Oberbegriff des Anspruchs 1.The invention relates to a compressor, in particular for a Automotive air spring system, having the features in the preamble of the claim 1.

Es ist ein Kompressor dieser Art bekannt (DE 100 05 929 A1), bei dem der durch den Kolben geführte Kanal als ausmittige Bohrung ausgebildet ist, die den Kolben von dessen oberer Stirnseite bis zur gegenüberliegenden Unterseite vollständig durchsetzt. Die im Bereich der oberen Kolbenstirnseite befindliche Einlassöffnung ist mittels eines Einlassorganes, z.B. in Form eines Flatterventils, verschlossen, während der Kanal am gegenüberliegenden Ende offen ist und zu dem Bereich ausmündet, der zwischen der Kolbenunterseite und dem Zylindergehäuse gebildet ist. Auf der dem Kompressionsraum gegenüberliegenden Seite des Kolbens ist ein Kurbelwellenraum vorgesehen, der vom Kurbelwellengehäuse und von der Unterseite des Kolbens begrenzt ist und der über einen in den Kurbelwellenraum mündenden und dort mittels eines Ventils verschließbaren Ansaugstutzen mit der Umgebung verbunden ist. Im oberen Totpunkt des Kolbens schließt das Ventil und verschließt damit den Ansaugstutzen und die Verbindung zur Atmosphäre, wobei dies auch während der Abwärtsbewegung des Kolbens der Fall ist, bis der Kolben seinen unteren Totpunkt erreicht, in dem das Ventil den genannten Ansaugstutzen öffnet. Während der Aufwärtsbewegung des Kolbens bleibt der Ansaugstutzen und damit die Verbindung zur Atmosphäre geöffnet. Das den Ansaugstutzen verschließende Ventil im Inneren des Kurbelwellenraumes wird vom Antriebsmotor des Kompressors angetrieben.It is a compressor of this type known (DE 100 05 929 A1), in which by the piston guided channel is formed as an off-center bore, the Piston from its upper end to the opposite bottom completely interspersed. The located in the upper piston face Inlet opening is by means of an inlet member, e.g. in the form of a flutter valve, closed, while the channel is open at the opposite end and closed the area opens, between the piston bottom and the cylinder housing is formed. On the opposite side of the compression space the piston is a crankshaft space provided by the crankshaft housing and is bounded by the bottom of the piston and the one in the crankshaft space opening and closable there by means of a valve Intake manifold is connected to the environment. At the top dead center of the Piston closes the valve and thus closes the intake manifold and the Connection to the atmosphere, while also during the downward movement the piston is the case until the piston reaches its bottom dead center, in the the valve opens the said intake manifold. During the upward movement the piston remains the intake manifold and thus the connection to the atmosphere open. The valve closing the intake manifold inside the crankshaft chamber is driven by the drive motor of the compressor.

Der Erfindung liegt die Aufgabe zugrunde, einen Kompressor, insbesondere für ein Kraftfahrzeug-Luftfedersystem, zu schaffen, der insbesondere für ein geschlossenes Luftfedersystem geeignet ist und bei vorhandenen Gegendrücken stets aus jeder Position anlaufen kann mit Selbstansaugung in allen Bereichen.The invention has for its object to provide a compressor, in particular for a motor vehicle air spring system, in particular for a closed air spring system is suitable and existing back pressures always starting from any position can with self-priming in all areas.

Die Aufgabe ist bei einem Kompressor der eingangs genannten Art gemäß der Erfindung durch die Merkmale im Anspruch 1 gelöst. Weitere vorteilhafte Erfindungsmerkmale und Ausgestaltungen ergeben sich aus den Unteransprüchen. Durch die Erfindung ist erreicht, dass der Ansaugdruck innerhalb des Kolbens angesaugt wird, so dass der Kolben gleichmäßig vom Ansaugdruck umströmt ist. Somit ist der Kolben auf der gesamten Fläche mit gleichem Druck beaufschlagt, wobei er beim Anlauf nur noch gegen den Ausgangsdruck im Verdichterbereich anlaufen muss. Eine Verwirbelung im Ansauggehäuse geschieht nicht. Der Wirkungsgrad des Kompressors wird dadurch erheblich günstiger, wobei der Kompressor klein, kompakt und einfach bei hohem Wirkungsgrad gestaltet ist. Der Kompressor kann aus jeder Position anlaufen, wobei in allen Bereichen eine Selbstansaugung gegeben ist.The task is in a compressor of the type mentioned in accordance with Invention solved by the features in claim 1. Further advantageous Features and embodiments of the invention will become apparent from the dependent claims. By the invention it is achieved that the suction pressure within the piston is sucked so that the piston is evenly from the suction pressure flows around. Thus, the piston is on the entire surface with the same pressure at the start only against the outlet pressure in Must start compressor area. A turbulence in the intake housing does not happen. The efficiency of the compressor is thereby considerably cheaper, the compressor is small, compact and easy at high Efficiency is designed. The compressor can start from any position, where in all areas a self-priming is given.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung. Further details and advantages of the invention will become apparent from the following Description.

Die Erfindung ist nachfolgend anhand eines in der Zeichnung gezeigten Ausführungsbeispieles näher erläutert. Die Zeichnung zeigt einen schematischen Schnitt eines Teils eines aus Antriebsmotor, Kompressor und Lufttrockner bestehenden Druckluftaggregats.The invention is described below with reference to an illustrated in the drawing Embodiment explained in more detail. The drawing shows a schematic Cutting a part of a drive motor, compressor and air dryer existing compressed air unit.

Das in der Zeichnung gezeigte Druckluftaggregat 10 weist einen nur schematisch angedeuteten elektrischen Hochleistungsmotor 11 und einen Kompressor 12 auf, die zu einer Einheit zusammengebaut sind. Bestandteil dieser Einheit ist ferner ein nur schematisch angedeuteter Lufttrockner 13, der bei einem anderen, nicht gezeigten Ausführungsbeispiel auch entfallen kann. Der Lufttrockner 13 erstreckt sich in platzsparender Weise oberhalb des Motors 11 und verläuft zu diesem etwa parallel, wobei der Querabstand zwischen beiden gering ist. Beim gezeigten Ausführungsbeispiel ist der Lufttrockner 13 mit seinem Gehäuse direkt an das Gehäuse 14 des Kompressors 12 angesetzt.The compressed air unit 10 shown in the drawing has a schematic only indicated high-power electric motor 11 and a compressor 12, which are assembled into a unit. Part of this unit is further an only schematically indicated air dryer 13, in another, not also shown embodiment can be omitted. The air dryer 13 extends in a space-saving manner above the motor 11 and extends to this approximately parallel, the transverse distance between the two being small. When shown Embodiment, the air dryer 13 with its housing directly to the Housing 14 of the compressor 12 attached.

Das Druckluftaggregat 10 ist insbesondere für ein Kraftfahrzeug-Luftfedersystem bestimmt, und hierbei vorzugsweise für ein geschlossenes Luftfedersystem. Bei einem derartigen geschlossenen Luftfedersystem ist es erforderlich, dass innerhalb des Systems eine Druckerhöhung ermöglicht wird. Dies kann bedeuten, dass die im System vorhandenen Drücke von z.B. 2 bis 10 bar erhöht werden müssen auf z.B. 8 bis 18 bar oder gar auf 20 bar oder mehr.The compressed air unit 10 is in particular for a motor vehicle air spring system determined, and here preferably for a closed air spring system. at Such a closed air spring system requires that within the system a pressure increase is made possible. This can mean that the pressures in the system of e.g. 2 to 10 bar can be increased must be set to e.g. 8 to 18 bar or even 20 bar or more.

Der Kompressor 12 weist im Gehäuse 14 einen Zylinderraum 15 auf, in dem ein Kolben 16 dicht und hin- und hergehend geführt ist. Beim gezeigten Ausführungsbeispiel ist lediglich ein Kolben16 vorgesehen. Bei einem anderen, nicht gezeigten Ausführungsbeispiel können auch mehrere Kolben angeordnet sein. Der Kolben 16 schließt mit seiner in der Zeichnung oberen Stirnseite 17 zusammen mit dem dortigen Bereich des Gehäuses 14 einen Kompressionsraum 18 ab, in dem Druckluft verdichtet wird. Die Druckluft wird in der Saugphase von außen her über eine Zuleitung 19 und eine Öffnung 20 im Gehäuse 14 angesaugt. Der Kompressionsraum 18 weist mindestens eine Auslassöffnung 21 auf, die mittels eines Auslassorganes 22 verschlossen ist, welches geöffnet werden kann, wobei die mindestens eine Auslassöffnung 21 und deren Auslassorgan 22 zum Lufttrockner 13 hin öffnen. Gezeigt ist ferner eine weitere Auslassöffnung 23 mit Auslassorgan 24 und angeschlossener Abführleitung 25, die einen Druckluftabgang ohne Lufttrockner 13 bilden.The compressor 12 has in the housing 14 a cylinder chamber 15 in which a Piston 16 is tight and reciprocated. In the illustrated embodiment only one piston 16 is provided. In another, not shown embodiment may also be arranged a plurality of pistons. The piston 16 closes with its upper end side 17 in the drawing together with the local area of the housing 14 a compression space 18, in which compressed air is compressed. The compressed air is in the suction phase of on the outside via a supply line 19 and an opening 20 in the housing 14th sucked. The compression space 18 has at least one outlet opening 21 which is closed by means of an outlet member 22, which can be opened, wherein the at least one outlet opening 21 and its outlet member 22 to the air dryer 13 open. Shown is also a further outlet opening 23 with Outlet 24 and connected discharge line 25, a compressed air outlet without air dryer 13 form.

Das jeweilige Auslassorgan 22 bzw. 24 besteht aus einem Überdruckventil, welches den Druck im Kompressionsraum 18 steuert und derart eingestellt ist, dass es erst bei Erreichen eines eingestellten Drucks öffnet.The respective outlet member 22 and 24 consists of a pressure relief valve, which controls the pressure in the compression space 18 and is set so that it opens only when a set pressure is reached.

Der mindestens eine Kolben 16 ist mittels eines Pleuels 26 angetrieben, das mittels eines Lagers 27 auf einem Exzenterabschnitt 28 am Ende der Motorwelle 29 des Motors 11 drehbar gelagert ist. Auf der Motorwelle 29 ist eine Ausgleichsmasse 30 zum Gewichtsausgleich befestigt. Ferner kann an dem Ende des Pleuels 26, das dem Kolben 16 gegenüberliegt, eine weitere Ausgleichsmasse 31 ebenfalls zum Massenausgleich angebracht sein. Der Kolben 16 ist mit dem Pleuel 26 beweglich über einen quer dazu verlaufenden Kolbenbolzen 32 verbunden.The at least one piston 16 is driven by a connecting rod 26, the by means of a bearing 27 on an eccentric portion 28 at the end of the motor shaft 29 of the motor 11 is rotatably mounted. On the motor shaft 29 is a balancing mass 30 attached to counterbalance. Furthermore, at the end of the Connecting rod 26, which is opposite to the piston 16, another balancing mass 31st also be appropriate for mass balance. The piston 16 is connected to the Connecting rod 26 movable via a transversely extending piston pin 32nd connected.

Der Kompressionsraum 18 weist mindestens eine im Kolben 16 angeordnete Einlassöffnung 33 auf, die von einem Einlassorgan 34 verschlossen ist, welches geöffnet werden kann. Das Einlassorgan 34 ist nur schematisch angedeutet und besteht z.B. aus einem üblichen Flatterventil mit einer beweglichen Platte als Ventilglied. Es ist am Kolben 16 zentral und im Bereich der Kolbenstirnseite 17 angebracht, wobei das Einlassorgan 34 bei einer Verdichtung im Kompressionsraum 18 selbsttätig geschlossen wird, während es in der Saugphase unter diesem Ansaugdruck selbsttätig öffnet. Die mindestens eine Einlassöffnung 33 im Kolben 16 ist über mindestens einen durch den Kolben 16 geführten Kanal 35 mit angesaugter Luft speisbar. Zwischen dem Kolben 16 und dem zylindrischen Gehäuse 14 ist ein Ringraum 36 gebildet, der axial beidseitig abgedichtet ist und in den über die mindestens eine Öffnung 20 die Luft eingesaugt wird. Der Ringraum 36 steht mit dem Kanal 35 in Verbindung. Beim gezeigten Ausführungsbeispiel ist der Ringraum 36 im Kolben 16 ausgebildet. Bei einem anderen, nicht gezeigten Ausführungsbeispiel ist der Ringraum 36 statt dessen im zylindrischen Gehäuse 14 ausgebildet. Zur Bildung des Ringraumes 36 weist der Kolben 16 umfangsseitig eine Ringnut 37 auf. Das Axialmaß des Ringraumes 36, insbesondere der Ringnut 37, ist in Abhängigkeit von der Hubhöhe des Kolbens 16 gewählt. Die radiale Tiefe des Ringraumes 36, insbesondere der Ringnut 37, ist in Abhängigkeit vom gewünschten Fördervolumen gewählt.The compression space 18 has at least one arranged in the piston 16 Inlet opening 33, which is closed by an inlet member 34 is, which can be opened. The inlet member 34 is indicated only schematically and consists e.g. out a conventional flutter valve with a movable plate as a valve member. It's on Piston 16 is mounted centrally and in the region of the piston end face 17, wherein the Inlet member 34 at a compression in the compression chamber 18 automatically closed while it is in the suction phase under this suction pressure opens automatically. The at least one inlet opening 33 in the piston 16 is over at least one guided by the piston 16 channel 35 with sucked air can be fed. Between the piston 16 and the cylindrical housing 14 is a Annulus formed 36, which is axially sealed on both sides and in the on the at least one opening 20, the air is sucked. The annular space 36 is available the channel 35 in connection. In the embodiment shown, the annulus 36 formed in the piston 16. In another, not shown embodiment is the annular space 36 instead in the cylindrical housing 14th educated. To form the annular space 36, the piston 16 peripherally an annular groove 37. The axial dimension of the annular space 36, in particular the annular groove 37, is selected as a function of the lifting height of the piston 16. The radial Depth of the annular space 36, in particular the annular groove 37, is dependent on desired delivery volume selected.

Zur Abdichtung weist der Kolben 16 zwei in Axialrichtung dieses in Abstand voneinander angeordnete, den Ringraum 36 abdichtende Kolbenringe 38 und 39, z.B. aus Kunststoff, auf. Ferner trägt der Kolben 16 Führungsringe 40, 41, die vorzugsweise ebenfalls aus Kunststoff bestehen können.For sealing, the piston 16 has two in the axial direction of this distance mutually arranged, the annular space 36 sealing piston rings 38 and 39, e.g. plastic, on. Further, the piston 16 carries guide rings 40, 41, the preferably also may be made of plastic.

Der Kanal 35 weist einen mittig im Kolben 16 verlaufenden und bis zur Einlassöffnung 33 führenden Zentralkanal 42 und mindestens einen Verbindungskanal 43 auf, der den Zentralkanal 42 mit dem Ringraum 36, insbesondere der Ringnut 37, verbindet. Der Zentralkanal 42 ist als Axialbohrung ausgebildet, die sich mittig durch den Kolben 16 und dabei nur über einen Teil seines Axialmaßes, erstreckt und die lediglich zur Einlassöffnung 33 hin offen ist, hingegen zur anderen, dem Kolbenbolzen 32 zugewandten Ende des Kolbens 16 geschlossen ist. Der mindestens eine Verbindungskanal 43 ist z.B. als Querbohrung im Kolben 16 ausgebildet. Dabei versteht es sich, dass auch mehrere radiale Querbohrungen dieser Art vorgesehen sein können. The channel 35 has a center in the piston 16 and extending to the inlet opening 33 leading central channel 42 and at least one connecting channel 43, the central channel 42 with the annular space 36, in particular the annular groove 37, connects. The central channel 42 is formed as an axial bore, which is centered by the piston 16 and thereby only over a part of its axial dimension, extends and which is open only to the inlet opening 33, while the other, the Piston pin 32 facing the end of the piston 16 is closed. Of the at least one connection channel 43 is e.g. as a transverse bore in the piston 16 educated. It is understood that also several radial transverse bores This type can be provided.

In der Ansaugphase wird über die Zuleitung 19, die Öffnung 20 und den Ringraum 36, insbesondere die Ringnut 37, und sodann über den Kanal 35 Luft und somit der Ansaugdruck innerhalb des Kolbens 16 angesaugt. Dies hat den Vorteil, dass keine Luftverwirbelung im Gehäuse 14 geschieht. Da die Luft mitten im Kolben 16 angesaugt wird, wird der Kolben 16 vom Ansaugdruck gleichmäßig umströmt. Der Kolben 16 ist somit auf der ganzen Fläche mit gleichem Ansaugdruck beaufschlagt und muss in der Verdichtungsphase nur noch gegen den Ausgangsdruck im Verdichterbereich anlaufen. Von Vorteil ist, dass keinerlei Turbulenzen entstehen und deswegen der Wirkungsgrad erheblich gesteigert wird. Aufgrund der Abdichtung des Kolbens 16 mittels der Kolbenringe 38 und 39 zu beiden Seiten kann nur noch ein etwaiger Leckdruck in den Hohlraum des Gehäuses 14 und damit in den Motorraum gelangen, der dann in etwa vom Atmosphärendruck beaufschlagt ist, der immer geringer ist als der Ansaugdruck. Von Vorteil ist, dass der Kompressor 12 bei vorhandenen Gegendrücken stets aus jeder Position anlaufen kann, wobei ferner eine Selbstansaugung in allen Bereichen gegeben ist.In the intake phase is via the supply line 19, the opening 20 and the Annular space 36, in particular the annular groove 37, and then via the channel 35 air and thus the suction pressure within the piston 16 is sucked. This has the Advantage that no air turbulence in the housing 14 happens. Because the air in the middle is sucked in the piston 16, the piston 16 from the suction pressure evenly flows around. The piston 16 is thus on the entire surface with the same suction pressure and has only in the compression phase against the Start output pressure in the compressor area. The advantage is that no Turbulence occurs and therefore the efficiency significantly increased becomes. Due to the sealing of the piston 16 by means of the piston rings 38 and 39th on both sides, only a possible leak pressure in the cavity of the Housing 14 and thus get into the engine compartment, which then in about the Atmospheric pressure is applied, which is always less than the suction pressure. The advantage is that the compressor 12 always in existing back pressures can start from any position, which also has a self-priming in all Areas is given.

Claims (10)

  1. Compressor, especially for an air spring system for a vehicle, having at least one piston (16) which is guided in an airtight manner in a housing (14) and at one end (17) together with the housing (14) closes off a compression space (18) which has at least one outlet (21, 23), which is closed by an outlet element (22, 24) which can be opened, and at least one inlet opening (33), which is closed by an inlet element (34) and can be opened, the at least one outlet opening (21, 23) being contained in the housing (14) and the at least one inlet opening (33) being arranged in the piston (16) and being able to be fed with sucked-in air via at least one passage (35) guided through the piston (16), characterized in that an annular space (36) which is sealed axially on both sides and into which the air is sucked and which is connected to the passage (35) is formed between the piston (16) and the housing (14).
  2. Compressor according to Claim 1, characterized in that the annular space (36) is formed in the housing (14).
  3. Compressor according to Claim 1, characterized in that the annular space (36) is formed in the piston (16).
  4. Compressor according to Claim 3, characterized in that the piston (16) has an annular groove (37) on the circumference.
  5. Compressor according to one of Claims 1 to 4, characterized in that the axial extent of the annular space (36) is selected as a function of the stroke length of the piston (16).
  6. Compressor according to one of Claims 1 to 5, characterized in that the radial depth of the annular space (36) is selected as a function of the volumetric displacement.
  7. Compressor according to one of Claims 1 to 6, characterized in that the piston (16) has two piston rings (38, 39) which are arranged at a distance from each other in the axial direction of the piston and seal off the annular space (36).
  8. Compressor according to one of Claims 1 to 7, characterized in that the passage (35). has a central passage (42), which runs centrally in the piston (16) and leads as far as the inlet opening (33), and at least one connecting passage (43) which connects the central passage (42) to the annular space (36).
  9. Compressor according to Claim 8, characterized in that the central passage (42) is designed as a central axial bore which extends only over part of the axial extent of the piston (16) and is only open towards the inlet opening (33).
  10. Compressor according to Claim 8, characterized in that the at least one connecting passage (43) is designed as a transverse bore in the piston (16).
EP03013762A 2002-06-25 2003-06-18 Compressor, especially for an air spring system for a vehicle Expired - Lifetime EP1375919B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20209814U 2002-06-25
DE20209814U DE20209814U1 (en) 2002-06-25 2002-06-25 Compressor, in particular for a motor vehicle air spring system

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EP1375919A1 EP1375919A1 (en) 2004-01-02
EP1375919B1 true EP1375919B1 (en) 2005-03-30

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EP2161451A1 (en) * 2008-09-09 2010-03-10 HAUG Kompressoren AG Piston compressor
DE102020133941A1 (en) 2020-07-10 2022-01-13 Amk Holding Gmbh & Co. Kg Air suspension compressor for a vehicle

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FR660699A (en) * 1928-07-17 1929-07-16 Air compressor piston
DE19926384A1 (en) * 1999-06-10 2000-10-12 Mannesmann Sachs Ag Piston compressor is for producing compressed air for units in road vehicle, such as air springs with and without height regulation, compressed air brakes, positioning drive or for auxiliary power production
DE10005929C2 (en) * 2000-02-10 2002-01-03 Continental Ag Compressor for an automotive air spring system

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EP1375919A1 (en) 2004-01-02
DE20209814U1 (en) 2002-12-19
DE50300405D1 (en) 2005-05-04

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