DE102012007342A1 - Compressed air feed system for operating pneumatic spring system in sports utility vehicle, has air dryer arrangement comprising two air dryer stages pneumatically connected over pneumatic tap, and throttle attached at tap - Google Patents

Abstract

The system (1000) has an air dryer arrangement (100) in a pneumatics main pipe (200), which pneumatically connects compressed air supply (1) from an air compressor (400) and a compressor air outlet (2) to a pneumatic system (1001). A valve arrangement (300) is pneumatically attached to the pipe and controls pressurized air flow. The dryer arrangement comprises two air dryer stages (101, 102) in respective partial pipes (103, 104) of the main pipe pneumatically connected over a pneumatic tap (180) so that the partial pipes are brought together. A throttle (191) is attached at the tap.

Description

The invention relates to a compressed air supply system according to the preamble of claim 1. Furthermore, the invention relates to a compressed air supply system according to claim 16 and a vehicle, in particular a car, according to claim 17.

A compressed air supply system is used in vehicles of all kinds, in particular for supplying an air spring system of a passenger car with compressed air. Air suspension systems may also include level control devices, with which the distance between the vehicle axle and vehicle body can be adjusted. An air spring system of a pneumatic compressed air supply system mentioned at the beginning comprises a number of air bellows pneumatically connected to a common line (gallery) which, with increasing filling, can lift the vehicle body and lower it with decreasing filling. Such a system is preferably used in an off-road vehicle and a sports utility vehicle (SUV). A compressed air supply system for use in a pneumatic compressed air supply system with a pneumatic system, for example, with an air spring system described above, is operated with compressed air from a compressed air supply, for example, within a pressure level of 5 to 20 bar. The compressed air is made available by means of an air compressor (compressor) of the compressed air supply. The compressed air supply is pneumatically connected on the one hand to supply the pneumatic system with a compressed air connection and on the other hand pneumatically connected to a vent port. Via a vent valve arrangement, the compressed air supply system and / or the pneumatic system can be vented by venting air to the vent port.

To ensure long-term operation of the compressed air supply system, this has an air dryer with which the compressed air is to be dried. As a result, the accumulation of moisture in the compressed air supply system is avoided, which can otherwise lead to valve-damaging crystal formation and other undesirable effects in the compressed air supply system and in the pneumatic system at comparatively low temperatures. An air dryer has a desiccant, usually a granular bed, which can be traversed by the compressed air, so that the granular bed - at relatively high pressure - can absorb moisture contained in the compressed air by adsorption. It has been proven to accommodate the dry granules in a separate, replaceable dryer cartridge, which is inserted into a dryer housing. Such a dryer cartridge has a dryer bed for U-shaped or alternately counter-rotating guidance of a compressed air flow in an array of annular spaces to be flowed through. The dryer cartridge can be easily replaced. On the other hand, the dryer bed is extended by the guidance of the compressed air flow in the annular spaces to be flowed through and thus improves the drying of the compressed air.

An example from WO 2005/051521 A1 known dryer cartridge for a commercial vehicle provides a basic structure with an outer annulus and an inner central space in the dryer cartridge so that a flow of compressed air flows through the entire outer annulus of the dryer cartridge, diverted in a dome above the annulus to the central space and in the counterflow direction parallel to the outer Annulus is guided in the central space; the compressed air flow leaves the dryer cartridge on the same side as when it flows in. Out DE 10 2006 037 307 A1 discloses a dryer cartridge, which provides a meandering nesting such annular spaces, wherein the annular spaces are flowed through the same principle in parallel and in countercurrent flow of compressed air; ie a drying container in the form of the dryer cartridge has an outer container outer wall and a number of annular walls along a longitudinal extent of the dryer cartridge, wherein the annular walls divides a limited space from the container outer wall of the dryer cartridge into a plurality of annular spaces which are pneumatically connected and parallel and countercurrently flowed through ,

An alternative version of a replaceable dryer cartridge is off EP 1 048 540 A1 The dryer cartridge is formed with a container outer wall whose interior is subdivided by a number of loosely inserted partition plates extending over the cross section of the interior into partitions which extend over the entire cross section of the interior space. The compressed air flow enters the dryer cartridge via a narrow outer annular space, is diverted in a dome thereof and flows through the partitions between the plates in each case transversely to a longitudinal extent of the dryer cartridge. Such a dryer cartridge causes a relatively high pressure loss in a compressed air flow.

EP 1 233 183 B1 describes a compressed air control device with an air dryer in the housing a cup-shaped drying container is inserted and the interior of which via the housing on the one hand with a pressure medium source and on the other hand with a pressure accumulator via a valve arrangement is connectable. The valve arrangement provides a first, second and third controllable directional control valve, wherein two of the valves are used to open a first and second passage in the bottom of the drying container. Opposite the bottom of the drying container this is open, wherein the granules contained in the drying container is held on a cover plate which is centered on a central rod and fixed thereto end by means of a spring clip. The interior of the drying container surrounding the rod can be flowed through in two directions, for emptying or filling the pressure accumulator. This structure is comparatively complex and can be improved in its function.

Desirable is improved air drying, especially with an improved dryer bed, with still acceptable pressure drop. The improved air drying should also be suitable in particular for use in a car. In particular, an air dryer arrangement should be space-saving feasible.

At this point, the invention begins, whose task is to provide a device for operating a pneumatic system with a compressed air flow, with improved air drying should be feasible. In particular, an air dryer arrangement of a compressed air supply system is to provide improved air drying and extended pneumatic functionality. In particular, the air drying should be feasible by means of a comparatively long and flexibly configurable dryer bed with still acceptable pressure loss. In particular, the compressed air supply system should be comparatively compact and particularly suitable for a car vehicle. The object of the invention is also to provide a compressed air supply system and a vehicle with the compressed air supply system.

The object with regard to the device is achieved with a compressed air supply system of claim 1. The object is also achieved with a compressed air supply system of claim 16. The invention also leads to a vehicle, in particular a passenger vehicle, of claim 17. The invention also leads to a use according to claim 18.

The invention is based on the consideration that the basic approach for realizing an improved drying by means of an arrangement of spaces to be flowed through can be used to improve the dryer performance of an air dryer arrangement. The invention has recognized that nevertheless, u. a. To limit a pressure loss, the arrangement of rooms to be flowed even better and expandable. The invention has recognized that in the compressed air supply system, the air dryer arrangement according to the invention can be formed in the main pneumatic line with a first air dryer stage in a first part line and a second air dryer stage in a second part line. In particular, the first and second sub-line parts, sections or branches of the main pneumatic line. By the pneumatic integration of the first and second part of the line with the first and second air dryer stage in the main pneumatic line a flow-optimized guidance of the compressed air flow is provided, so that even with an extended dryer bed, a pressure drop is kept comparatively low.

In addition, the invention has recognized that a pneumatic tap, over which the compressed air flow can be guided, can be used with particular advantage to merge the first part line and the second part line of the main pneumatic line. In addition, to improve the functionality of the air dryer assembly, the tap is configured to provide or connect thereto a pneumatic element.

The concept of the invention also leads to a use of the compressed air supply system according to the invention for operating the pneumatic system, in particular an air spring system, with a compressed air flow (DL) in a passenger car, in particular in an SUV. With the compact and pressure-resistant design of the drying hopper, the concept supports the rapid deaeration cycles that occur during this use and the high air consumption and storage operation.

Advantageous developments of the invention can be found in the dependent claims and specify in particular advantageous ways to realize the above-described concept within the scope of the task and with regard to further advantages.

For example, the pneumatic tap can be used to connect a connecting line, in particular a connecting line to a pneumatic intermediate connection. In a particularly preferred constructional development, this concept is used to connect a pneumatic intermediate connection of the air dryer arrangement in the area or at a pneumatic connection between the first and second air dryer stage.

A "pneumatic" feature (for example a pneumatic element) is to be understood in the present case as a feature (element) suitable for compressed air guidance; For example, under a pneumatic connection, a connection suitable for guiding the compressed air flow, such as a pneumatic line or a passage suitable for guiding the compressed air flow, or the like, is to be understood as a "pneumatic" feature. Under a pneumatic connection with a pneumatic element according to the concept of the invention is a mere pneumatic connection of the first and Understanding second sub-line pneumatic connection, which has an expanded pneumatic functionality to influence the flow of compressed air due to the (compressed air) suitable element for pneumatic control. The pneumatic element may in particular be realized as an above-mentioned pneumatic intermediate connection, in particular - additionally or alternatively - for example in the form of a throttle, a nozzle, in the form of a valve or the like. Pneumatic element, as set forth in the further subclaims.

The pneumatic connection, in particular with the additionally connected pneumatic intermediate connection, can be used to support the influence on the compressed air flow and thus to improve drying. For example, a pneumatic element on the tap - so in particular on the pneumatic connection - are arranged or connected, wherein the pneumatic element has a control function; z. B. is formed in the form of a throttle or a throttle with adjustable nominal diameter. For example, a pneumatic element on the tap - so in particular at the pneumatic connection - are arranged or connected, wherein the pneumatic element has a sensor function; z. B. is formed in the form of a volumetric flow sensor or pressure sensor or temperature or humidity sensor. In this sense, the tap is also referred to as a pneumatic control and / or sensor tap, d. H. the pneumatic tap is designed to provide a control and / or sensor function.

The concept of the invention thus provides the basis for acting pneumatically on the compressed-air flow in a particularly preferred area of the compressed-air flow, namely in the region of a merger of the first and second sub-lines. The pneumatic interventions can be realized without excessive pressure loss for the compressed air flow.

The concept of the invention is not limited to a compressed air supply system with an air dryer arrangement, which - however particularly advantageous - has only two air dryer stages. Rather, an air dryer arrangement may be provided with more than just two air dryer stages. In particular, in a development, a drying container, the concept of the invention further education and more than two chambers and / or have more than one web. For example, it can be provided in a variant that a first and a second web along a longitudinal extension of the drying container divides an inner space bounded by the container outer wall into a first and a second and a third chamber, wherein the first chamber and the second chamber through the first web and the container outer wall is bounded and the second chamber and the third chamber are bounded by the second web and the container outer wall, and the first and second web adjoins the container outer wall along the longitudinal extent and the first, second and third chambers are arranged alongside one another along the longitudinal extent , It can also be provided more than two webs and / or more than three chambers.

Within the scope of a particularly preferred development, provision is made for a pneumatic intermediate connection of the air dryer arrangement to be connected or arranged in the region or on the pneumatic tap. A pneumatic element can be arranged or connected to the tap and / or intermediate connection. In particular, the tap is arranged on or in the region of a pneumatic connection of the first and second air dryer stage. In particular, it is provided that the first and second air dryer stage are pneumatically connected via a pneumatic connection and the intermediate connection is formed in the region and / or on the pneumatic connection. Particularly preferably, the pneumatic connection can connect the first and second sub-line; in combination with the intermediate connection, a preferred structural unit is formed. The thus preferably provided combination of pneumatic tap, in particular connection, and pneumatic element in the form of a pneumatic unit has on the one hand on the pneumatic tap, in particular connection, formed guide for the compressed air flow between the first and second part of line, and on the other hand the possibility to provide a pneumatic element.

A pneumatic element can be used to influence the flow of compressed air and be arranged on the pneumatic connection and / or connected to the pneumatic intermediate connection.

Constructively advantageous, a first air dryer stage is formed as a first chamber of a drying container. Constructively advantageous, a second air dryer stage is formed as a second chamber of a drying container. The first and second chambers are preferably integrally formed with a web and a container outer wall of the drying container. Preferably, a pneumatic intermediate connection is arranged along a longitudinal extent at the level of a pneumatic connection formed between a first chamber and a second chamber of the air dryer arrangement. In particular, the pneumatic connection and the pneumatic intermediate connection are integrated in a pneumatic unit in the form of a transverse core. The transverse core may preferably be formed as a tubular protuberance or extension of the drying container.

In the context of this particularly preferred constructional development of the concept of the invention, the pneumatic unit (in particular in the form of the transverse core) can be realized in the air dryer arrangement, wherein the guidance of the compressed air flow in the pneumatic assembly (in particular in the transverse core) transversely to the flow direction of the compressed air flow in the first and second sub-line or transversely to the flow direction of the compressed air flow in the first and second air dryer stage is performed.

Preferably, the pneumatic assembly (preferably a pneumatic transverse core) is further adapted to the compressed air flow in the pneumatic connection from a flow direction in the first air dryer stage (or in the first part line) in a flow direction in the second air dryer stage (or in the second Sub-line). In addition, the pneumatic intermediate connection is advantageously present and can - but does not have to - be used in order to provide an additional pneumatic functionality for the pneumatic unit (in particular in the pneumatic transverse core).

In the context of a first variant, the first air dryer stage with the first part line and the second air dryer stage with the second part line can be arranged in a pneumatic series connection in the main pneumatic line. In particular, the pneumatic tap and / or intermediate connection between the first part line and the second part line is formed. Preferably, the compressed air flow is sequentially from the first part of line via the pneumatic tap, in particular the pneumatic connection, feasible to the second part of line or vice versa.

In a particularly preferred constructional development of this variant, a first and a second chamber can be pneumatically connected via the pneumatic connection and can be flowed through by a compressed air flow along a longitudinal extension of the air dryer arrangement and in opposite directions. Preferably, the compressed air flow passes through the first and second chambers along a longitudinal extension and in opposite directions with reversal of direction in the area of the pneumatic connection, d. H. along a substantially U-shaped flow path. Preferably, the first and second chambers are arranged side by side.

In a second variant, the first air dryer stage with the first part line and the second air dryer stage with the second part line can be arranged in a pneumatic parallel connection in the pneumatic main line, the first part line and the second part line are combined at a first and second pneumatic tap, preferably at a first and second pneumatic connection are merged. Preferably, a first intermediate connection to the first pneumatic connection and / or a second intermediate connection to the second pneumatic connection is provided.

In a particularly preferred constructional realization, a first and second chamber may form a pneumatic parallel circuit for this purpose, wherein the first part line is designed as a first branch line and the second part line as a second branch line to the main pneumatic line. Preferably, the first branch line of a first partial flow and the second branch line of a second partial flow of the compressed air flow are separated and simultaneously flowed through. The first and second partial flow flow through the first and second partial line in particular in the same direction, d. H. in particular in the same direction, along a longitudinal extent of the air dryer arrangement. Also in this constructive development of the second variant, the first and second chambers are preferably arranged next to one another. As a result, the flow guidance takes place along a substantially II-shaped flow path with two parallel partial flows in the same direction without reversal of direction.

In particular with regard to the abovementioned first and second variants, it has proved to be advantageous that the pneumatic structural unit (in particular an abovementioned pneumatic transverse core) comprises a pneumatic switchover device (in particular in the form of a pneumatic connection) and intermediate connection. Particularly preferably, in the pneumatic main line between the first and second air dryer stage, a switching device is configured to selectively switch the first air dryer stage and the second air dryer stage to form a pneumatic series connection or to form a pneumatic parallel circuit. In particular, for this purpose, an aforementioned first and second chamber in the air dryer arrangement can be connected in series or in parallel. For this purpose, it has proven to be preferred that the switching device is formed as a pneumatic drivable slide, web or the like pneumatic switching element. Preferably, the aforementioned pneumatic assembly (in particular a transverse core) is driven by a pneumatic switching element, for. B. can be intervened with different slide positions in a pneumatic connection to provide different Durchgangsnennweiten in the pneumatic connection.

On the basis of these and other refinements following the basic concept of the invention, it is particularly preferable to realize a variable multi-chamber operation, in particular an operation with exactly one first and one second chamber. The variable multi-chamber operation, for example, a series flow of at least the first and second chamber or a parallel flow at least the first and second chamber provide, which is also controllable via a pneumatic element and / or sensible.

In particular, according to the aforementioned development has been recognized that a first acted upon section of an air dryer bed -. B. in the first air dryer stage - when filling the pneumatic system is exposed to a relatively high moisture load. The term "first" and "second" air dryer stage in the present case does not necessarily refer to the order of application, which is dependent on the flow direction of the compressed air flow. A first-acting air dryer stage, the first air dryer stage but also - depending on the flow direction - be the second air dryer stage. For example, the first air dryer stage when filling the pneumatic system and the first acted upon air dryer stage and the second air dryer stage is then acted upon air dryer stage. When venting - especially for the regeneration of the air dryer assembly - the second air dryer stage is the first acted upon air dryer stage and the first air dryer stage the then acted upon air dryer stage.

In the present exemplary case, it was recognized that during filling, the first air dryer stage, which is first subjected to a compressed air flow, is exposed to a comparatively higher moisture load than a second air dryer stage.

By forming an air dryer assembly having first and second air dryer stages, it is generally possible to create conditions to use the most dryable parts of the air dryer assembly, as needed, in view of differently loaded dry bed sections. For example, can be used by changing a series and parallel connection of the first and second air dryer stage a residual drying ability.

A vehicle controller, such as an ECU, may be used to store the history of the compressed air supply system. Depending on the already existing and known moisture load of the first or second air dryer stage, the air dryer arrangement can thus be switched so that residual drying capabilities can be optimally utilized. For example, in the context of a parallel connection of the first and second air dryer stage at too high a load of the first air dryer stage, only the second air dryer stage can be used in order to use there still existing dryer potential.

In particular, in the context of a series connection of the first and second chambers, it is possible, the first and second chamber sequentially, d. H. in chronological order, to switch. A sequential circuit is also possible for a parallel connection of the first and second chambers. Ie. independently of a parallel or series connection, for example, the first air dryer stage can first be subjected to a compressed air flow to use residual drying capabilities and then - d. H. offset in time thereafter - the second air dryer stage with the compressed air flow in addition or depending on the circuit alternatively be exposed to the air pressure flow.

An intermediate connection - especially when not in use z. B. via a sealing plug closable intermediate connection - proves to be advantageous to provide an additional connection. The compressed air supply system and the connected pneumatic system can be provided with compressed air to fill the same via the connection. The intermediate connection can also be used to vent the pneumatic system and the compressed air supply system. This has the advantage that - depending on the needs and moisture load of an air dryer assembly for filling or venting the compressed air supply system - only the first or only the second air dryer stage (instead of the first and second air dryer) is to flow through. Only a partial admission of the air dryer arrangement can have advantages both in the air dryer function of an air dryer and in a regeneration of an air dryer.

In the context of the preferred refinements explained below, the abovementioned pneumatic structural unit can be used with a pneumatic connection in order to proceed with a pneumatic element on the same and / or on a pneumatic intermediate connection. With a suitable pneumatic element z. B. the flow velocity of the compressed air flow can be influenced. The pneumatic element is, for example, a throttle or a nozzle or similar constriction of the flow cross-section forming pneumatic element. The throttle and / or nozzle or the like flow rate influencing pneumatic element can be permanently switchable or variable in the nominal diameter.

Preferably, the pneumatic element has an adjustable nominal diameter. This has the Advantage that the flow velocity of the compressed air flow can be controlled. Advantageously, a flow velocity of the compressed air flow in the region of the intermediate connection and the pneumatic connection can be optimized, for example to a speed below 0.2 m / s.

In particular, the intermediate port and / or the pneumatic connection between the first and second air dryer stages of the air dryer assembly may include a sensor; In particular, the sensor can be connected to the intermediate connection. In particular, the sensor may be formed in the form of a pressure sensor, a humidity sensor, a temperature sensor or a volume flow sensor. A humidity and temperature sensor proves to be particularly advantageous, for example, to register the moisture saturation of a compressed air flow.

Preferably, the pneumatic intermediate connection and / or the pneumatic connection offer the possibility of providing a valve. Particularly preferably, an external consumer can be connected via the valve. The valve may be, for example, a container valve upstream of a pressure vessel. The valve may also be a pneumatic pilot valve.

Particularly preferably, a water separator can be connected to the intermediate connection. In addition, the moisture collecting in the air dryer arrangement can preferably be deposited.

Within the scope of a particularly preferred structural realization, it has proved to be advantageous for the air dryer arrangement to have a drying container with a container outer wall and a web along a longitudinal extent of the drying container, the web dividing an inner space bounded by the container outer wall into a first and a second chamber. This development has proven to be particularly advantageous for guiding the compressed air flow along the longitudinal extent via a pneumatic connection of the first and second chambers and in the first and the second chamber, as required or in opposite directions, as required. The intermediate connection can preferably be arranged along a longitudinal extent at the level of the pneumatic connection formed between the first and the second chamber, in particular a pneumatic passage.

It has proven to be particularly preferred that the web connects along the longitudinal extent of the container outer wall and the interior of the drying container is divided into a first and a second chamber, which are arranged side by side, both of which are limited by the web and the container outer wall.

Particularly preferably, the web is arranged to extend along a longitudinal extension following the central longitudinal axis of the drying container. Particularly advantageously, the first and the second chamber have substantially the same chamber interior spaces. In a particularly preferred embodiment, the first and the second chamber is provided with a same clear cross section of a flow path for the compressed air flow. In particular, the first and the second chamber may be formed with substantially the same geometric shape and dimension. This creates comparatively good conditions in order to influence the compressed air flow by means of the pneumatic element on the pneumatic connection and / or the intermediate connection.

Embodiments of the invention will now be described below with reference to the drawing in comparison with the prior art, which is also partly shown. This is not necessarily to scale the embodiments, but the drawing, where appropriate for explanation, executed in a schematized and / or slightly distorted form. With regard to additions to the teachings directly recognizable from the drawing reference is made to the relevant prior art. It should be noted that various modifications and changes may be made in the form and detail of an embodiment without departing from the general idea of the invention. The disclosed in the description, in the drawing and in the claims features of the invention may be essential both individually and in any combination for the development of the invention. In addition, all combinations of at least two of the features disclosed in the description, the drawings and / or the claims fall within the scope of the invention. The general idea of the invention is not limited to the exact form or detail of the preferred embodiment shown and described below or limited to an article that would be limited in comparison with the subject matter claimed in the claims. For the given design ranges, values within the stated limits should also be disclosed as limit values and arbitrarily usable and claimable. Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing. For identical or similar features or features identical or similar function, the same reference numerals are used herein for the sake of clarity.

In detail, the drawing shows in:

• – im Detail X1 ist eine Lufttrockneranordnung mit einem pneumatischen Abgriff und einem pneumatischen Element in Form eines Zwischenanschlusses zur Bildung einer pneumatischen Baueinheit in der Lufttrockneranordnung gezeigt,
• – im Detail Y1 ist ein pneumatischer Abgriff und ein pneumatisches Element in Form einer Drossel zur Bildung einer pneumatischen Baueinheit in der Lufttrockneranordnung gezeigt,
• – im Detail Z1 ist ein pneumatischer Abgriff und ein pneumatisches Element in Form einer pneumatischen Verbindung und einem Zwischenanschluss zur Bildung einer pneumatischen Baueinheit in der Lufttrockneranordnung gezeigt;

1 a circuit diagram for a particularly preferred compressed air supply system to which a pneumatic system is connected in the form of an air spring system for a car vehicle and in which the air dryer assembly is formed by means of a first and second air dryer stage connected in series,

• In detail X1 is shown an air dryer arrangement with a pneumatic tap and a pneumatic element in the form of an intermediate connection for forming a pneumatic unit in the air dryer arrangement,
• In detail Y1 is shown a pneumatic tap and a pneumatic element in the form of a throttle for forming a pneumatic unit in the air dryer arrangement,
• In detail Z1 is shown a pneumatic tap and a pneumatic element in the form of a pneumatic connection and an intermediate connection for forming a pneumatic unit in the air dryer arrangement;

2 a circuit diagram for a modified compressed air supply system to which a pneumatic system in the form of an air spring system for a car vehicle of 1 is connectable, wherein the air dryer assembly is provided with a pneumatic assembly which is formed of a pneumatic connection and a pneumatic element in the form of a controllable throttle and a pneumatic intermediate port for adjusting the nominal diameter of the throttle;

• – die Ansicht (A) zeigt verschiedene externe pneumatische Elemente,
• – die Ansicht (B) zeigt verschiedene externe pneumatische Sensoren;

3 in details X2, Y2 of the view (A) and in details X3, Y3, Z3 of the view (B) different pneumatic units for an air dryer arrangement of the compressed air supply system 1 with modification of the air dryer arrangements shown there in the details X1, Y1, Z1,

• The view (A) shows various external pneumatic elements,
• The view (B) shows various external pneumatic sensors;

4 a preferred constructional realization of a drying container for an air dryer arrangement, for example according to one of 1 to 3 with a first chamber for forming a first air dryer stage and a second chamber for forming a second air dryer stage and having a pneumatic connection and an intermediate connection for connecting a pneumatic element to the pneumatic connection and / or the intermediate connection;

5 a circuit diagram for a further embodiment of a compressed air supply system to which a pneumatic system in the form of an air spring system for a car vehicle of 1 is connectable and wherein the air dryer assembly is formed by means of a first and second air dryer stage in parallel.

1 shows a circuit diagram of a pneumatic compressed air supply system 1003 with a compressed air supply system 1000 and a pneumatic system 1001 in the form of an air spring system. This compressed air supply system 1000 has an air dryer arrangement 100 in a pneumatic main 200 on, which is a compressed air supply 1 from an air compressor 400 and a compressed air connection 2 to the pneumatic system 1001 pneumatically connects. To the pneumatic main 200 is a valve assembly 300 pneumatically connected to control a flow of compressed air. As can be further seen from detail X1, the air dryer arrangement 100 a first air dryer stage 101 in a first sub-line 103 the pneumatic main 200 and a second air dryer stage 102 in a second sub-line 104 the pneumatic main 200 inside the drying container 140 the air dryer arrangement 100 on. The section 201 the pneumatic main 200 is via a connection opening 203 on a drying container 140 the air dryer arrangement 100 connected; the section 202 the pneumatic main 200 is via a connection opening 204 to the drying container 140 the air dryer arrangement 100 connected.

The first and the second air dryer stage 101 . 102 are via a pneumatic tap 180 pneumatically interconnected, with the pneumatic tap 180 the first and the second sub-line 103 . 104 are merged. The pneumatic tap 180 has the concept of the invention following - in general - a pneumatic element 190 on. In the present case, in detail X1 and detail Y1 and detail Z1 are each an air dryer arrangement 100 with a pneumatic assembly 185 between the first and second air dryer stages 101 . 102 shown.

A pneumatic element 190 is present according to detail X1 of 1 as an intermediate connection 181 on the pneumatic tap 180 educated. Ie. a pneumatic assembly 185 in detail X1 is with a combination of a pneumatic tap 180 for merging the first and second sub-lines 103 . 104 the air dryer arrangement 100 and the pneumatic intermediate connection 181 educated.

A pneumatic element 190 is in modification according to detail Y1 of 1 as a throttle 191 on the pneumatic tap 180 educated. Ie. a pneumatic assembly 185 in detail Y1 is with a pneumatic tap 180 for merging a first and second sub-line 103 . 104 of the Air dryer assembly 100 formed as a pneumatic element 190 a throttle 191 having.

A pneumatic element 190 is present according to detail Z1 of 1 as an intermediate connection 181 on the pneumatic tap 180 formed, with the intermediate connection 181 with the pneumatic tap 180 via a pneumatic intermediate connection line 186 connected is. Ie. a pneumatic assembly 185 in detail Z1 is with a combination of a pneumatic tap 180 for merging the first and second sub-lines 103 . 104 the air dryer arrangement 100 and the pneumatic intermediate connection 181 as well as this connecting intermediate connection line 186 educated. In a particularly preferred structural design of this unit 185 of the detail Z1, the assembly can be considered a querkern 179 be executed, as in 4 is shown by way of example.

Overall, the tap 180 with the pneumatic element 190 as a pneumatic assembly 185 referred to, depending on the design of the pneumatic element 190 can be varied. The first and second air dryer stage 101 . 102 are by means of the pre-explained tap 180 in the pneumatic main 200 pneumatically connected to guide the compressed air flow DL. The pneumatic tap 180 is in a first modification the detail X1 of the 1 shown intermediate connection 181 or in a second modification that in detail Y1 of 1 shown pneumatic element 190 in the form of the throttle 191 or in a third modification that in detail Z1 of 1 shown pneumatic element 190 in the form of the intermediate connection 181 with intermediate connection line 186 assigned. Other variants are also by way of example with reference to the following 2 to 5 explained.

Present is the first air dryer stage 101 with the first sub-line 103 and the second air dryer stage 102 with the second sub-line 104 in a pneumatic series connection in the pneumatic main line 200 arranged so that the compressed air flow - as in 4 exemplified by a compressed air flow DL illustrated - sequentially between the first sub-line 103 and the second sub-line 104 via the pneumatic tap 180 - Preferably in the form of a pneumatic connection - and the pneumatic element 190 is feasible. As based on the in 4 illustrated preferred structural embodiment is illustrated, preferably forms the first air dryer stage 101 by means of a in the first sub-line 103 arranged first chamber 151 and the second air dryer stage 102 by means of a in the second sub-line 104 arranged second chamber 152 a pneumatic series connection of the first and second chambers 151 . 152 in the pneumatic main 200 , Here is the first and the second chamber 151 . 152 via a pneumatic connection 153 designed pneumatic tap 180 pneumatically connected such that the compressed air flow DL in the first and second chambers 151 . 152 along a longitudinal extent of the air dryer assembly 100 as well as in opposite directions is feasible. As further on the basis of 4 is explained, the compressed air flow DL is in the pneumatic assembly 1002 in the form of a pneumatic transverse core transverse to the compressed air flow DL in the first and second air dryer 101 . 102 feasible.

The compressed air supply system 1000 is used to operate the pneumatic system 1001 , The compressed air supply system 1000 has a previously mentioned compressed air supply 1 and a compressed air connection 2 to the pneumatic system 1001 on. The compressed air supply 1 is present with an air supply 0 , one of the air supply 0 upstream air filter 0.1 and one of the air supply 0 downstream of the engine 500 driven air compressor 400 and an unspecified port of the compressed air supply 1 educated. To the compressed air supply 1 close in the pneumatic main 200 Sections of 201 . 202 to connect an in 4 Drying container shown in detail 140 at.

In the in 1 illustrated embodiment of the air compressor 400 single-stage with a single compressor stage 403 a piston or a single compressor chamber, the piston being provided by a motor 500 is drivable. In a not shown to 1 alternative embodiment, the air supply 0 and one of these upstream filter element 0.1 with a vent connection 3 and a filter element upstream of this 3.1 be merged. In an in 5 shown, too 1 alternative embodiment, the air compressor 400 as a two-stage air compressor 400 ' be executed with a first and a second compressor stage, each with a piston and compressor space.

In the in 1 shown embodiment of the compressed air supply system 1000 is provided that a branch line 230 at the compressed air supply 1 from the pneumatic main 200 branches off and to another vent line 240 connects to the vent port 3 and to a vent downstream vent filter 3.1 is guided.

The pneumatic main 200 thus pneumatically connects the compressed air supply 1 and the compressed air connection 2 , where in the main pneumatic line 200 the air dryer arrangement 100 and continue in the direction of the compressed air connection 2 a pilot operated check valve 311 as well as a first throttle 331 is arranged. The pneumatically operated check valve 311 is present part of a directional control valve arrangement 310 , in addition to the unlockable check valve 311 a controllable vent valve 312 in series with a second throttle 332 in the vent line 240 having. The pneumatically operated check valve 311 is present also in a series connection with the first throttle 331 in the pneumatic main 200 arranged, the main pneumatic line 200 The only pneumatic line of a pneumatic connection is that extends to the pneumatic system 1001 with another pneumatic line 600 continues. The series arrangement of first throttle 331 and pneumatically releasable check valve 311 in the pneumatic main 200 So is between the air dryer arrangement 100 and the compressed air connection 2 to the pneumatic line 600 and pneumatic system 1001 in the pneumatic main 200 arranged.

Next points the compressed air supply system 1000 one with the pneumatic main 200 and the vent port 3 and the other filter 3.1 and / or silencer pneumatically connected second pneumatic connection, by means of the aforementioned vent line 230 and further vent line 240 is formed. The nominal diameter of the second throttle 332 is present above the nominal diameter of the first throttle 331 , That in through the vent line 230 formed second pneumatic connection arranged vent valve 312 is present as a pneumatically operated check valve 311 separate 2/2-way valve formed.

The controllable vent valve 312 is as indirectly switched relay valve part of a valve assembly 300 with a control valve 320 in the form of a 3/2-way solenoid valve. The control valve 320 can with one over a control line 321 transmittable control signal in the form of a voltage and / or current signal to the coil 322 of the control valve 320 be controlled. When activated, the control valve 320 from the in 1 shown closed position are transferred to a pneumatically open position. In the not shown by the second switching state of the control valve 320 realized open position is a via a pneumatic control line 250 from the pneumatic main line 200 derived pressure for pneumatic control of the controllable vent valve 312 as a relay valve is passed. The controllable vent valve 312 is present additionally with a pressure relief 313 Mistake. The pressure limit 313 engages via a pneumatic control line in front of the vent valve 312 - specifically between second throttle 332 and bleed valve 312 - From a pressure which, when exceeding a threshold pressure, the piston 314 of the vent valve 312 against the force of an adjustable spring 315 lifts off the valve seat - so the controllable vent valve 312 , even without control via the control valve 320 into the open position. In this way it is avoided that an undesirably high pressure in the compressed air supply system 1000 or the pneumatic system 1001 arises.

The control valve 320 separates the control line in the presently closed state 250 and is about yet another vent line 260 with the further vent line 240 to the vent connection 3 pneumatically connected. In other words, a between vent valve 312 and control valve 320 lying line section 251 the control line 250 at the in 1 shown closed position of the control valve 320 with the still further vent line 260 between control valve 320 and vent port 3 connected. The still further vent line 260 closes in the further branch connection 261 to the vent line 230 and the further vent line 240 so that this one in between the other branch connection 261 and the vent port 3 lying portion of a vent line 240 be merged.

About the control valve 320 can occur when one of the pneumatic main line 200 or from the other pneumatic line 600 via the pneumatic control line 250 derived control pressure the vent valve 312 under pressure of the piston 314 be opened. The piston 314 is presently designed as a double piston, so that provided with particular advantage, the transfer of the control valve 320 in the open state not only to open the vent valve 312 leads, but also to unlock the pilot operated check valve 311 , In other words, the control valve is used 320 the solenoid valve assembly 300 for controlling the separately from the check valve 311 provided vent valve 312 as well as the check valve 311 , This leads to a two-sided pneumatic opening of the air dryer assembly 100 at the transfer of the control valve 320 in the open position. This further through the compressed air supply system 1000 Inmaceable operating position can be used during operation for bleeding the pneumatic system 1001 and at the same time for regenerating the air dryer assembly 100 be used.

In the 1 shown operating position of the compressed air supply system 1000 serves to guide a compressed air flow in the direction of the check valve 311 especially for filling the pneumatic system 1001 via the pneumatic main line 200 as well as the further pneumatic line 600 ,

The pneumatic system 1001 of the 1 is formed in the form of an air spring system and in this case has a number of four so-called bellows 1011 . 1012 . 1013 . 1014 on, which are each associated with a wheel of a passenger vehicle, not shown, and form an air spring of the vehicle. Furthermore, the air suspension system has a memory 1015 for storing quickly available compressed air for the bellows 1011 . 1012 . 1013 . 1014 on. Those bellows 1011 . 1012 . 1013 and 1014 are each to one of a gallery 610 outgoing spring branch line 601 . 602 . 603 . 604 connected and each a solenoid-way valve 1111 . 1112 . 1113 . 1114 - here 2/2-way valves - downstream; a solenoid valve serves as a level control valve to open or close one with the bellows 1011 . 1012 . 1013 . 1014 formed air spring. The solenoid valves 1111 . 1112 . 113 . 1114 in the spring branch lines 601 to 604 are designed as 2/2-way valves. A store 1015 is in a memory branch line 605 a solenoid valve 1115 in the form of a further 2/2-way valve upstream as a storage valve. The solenoid valves 1111 . 1112 . 113 . 1114 . 1115 are by means of the spring and storage branch lines 601 . 602 . 603 . 604 respectively. 605 to a common bus, namely the aforementioned gallery 610 and then to the other pneumatic line 600 connected. The gallery 610 is via the pneumatic line 600 to the compressed air connection 2 the compressed air supply system 1000 pneumatically connected. In the present case are the solenoid valves 1111 . 1112 . 1113 . 1114 . 1115 in a valve block 1110 arranged with the five valves. The solenoid valves are in 1 shown in a de-energized state; Here are the solenoid valves 1111 . 1112 . 113 . 1114 . 1115 formed as normally closed solenoid valves. Other, not shown here modified embodiments can realize a different arrangement of the solenoid valves; There may also be fewer solenoid valves in the context of the valve block 1110 be used.

For filling the pneumatic system 1001 become the bellows 1011 . 1012 . 1013 . 1014 upstream solenoid valves 1111 . 1112 . 1113 . 1114 and / or the memory 1015 upstream solenoid directional control valve 1115 brought into an open position. Nevertheless, in the closed position of the solenoid valves in the pneumatic system 1001 - Due to the present not unlocked check valve 311 - An operating position of the pneumatic system 1001 decoupled from the compressed air supply system 1000 possible. In other words, a cross-over of bellows 1011 . 1012 . 1013 . 1014 (eg in off-road operation of a vehicle) - eg. B. filling the bellows from the memory 1015 or a pressure measurement in the pneumatic system 1001 - via the gallery 610 be made without the compressed air supply system 1000 is pressurized. In particular, the air dryer assembly 100 due to the compressed air connection 2 for compressed air supply 1 locked check valve 311 and the closed control valve 320 Protected against unnecessary pressurization with compressed air. Advantageously, an admission of the air dryer arrangement 100 with compressed air not at every operating position of the pneumatic system 1001 advantageous. Rather, it is for an effective and fast regeneration of the air dryer plant 100 advantageous if this only in the case of a venting of the pneumatic system 1001 from the compressed air connection 2 for compressed air supply 1 and then guide the compressed air flow to the vent port 3 is made; then with unlocked check valve 311 , For this purpose - as explained above - the control valve 320 brought into an open switch position, so that both the vent valve 312 opens as well as the check valve 311 is unlocked. A venting of the pneumatic system 1001 can over the first throttle 331 , the unlocked check valve 311 with regeneration of the air dryer assembly 100 and then on the second throttle 332 and the opened vent valve 312 for venting 3 respectively.

In other words, for simultaneous unlocking operation of the check valve 311 and for opening the venting valve 312 one from the control valve 320 pneumatically controllable control piston 314 as a double relay piston provided with a relay vent body 314.1 of the vent valve 312 and a Relaisysperrkörper 314.2 for the pilot operated check valve 311 , The double relay piston clarifies the principle for unlocking the check valve 311 and simultaneous actuation of the vent valve 312 via two coupled actuators - namely the Relaisentsperrkörper 314.2 and the relay vent body 314.1 - Can be formed as single-storey double relay body or in a modification as a separate body. In the context of a particularly preferred structural modification, the aforementioned actuating elements of the double relay piston can be formed as single-storey areas of a double relay piston.

2 shows a modified embodiment of a compressed air supply system 1000 ' , which except for a modified trained and connected air dryer arrangement 100 ' essentially analogous to the compressed air supply system 1000 of the 1 is formed and the one shown there pneumatic system 1001 can be connected. For identical or similar features or features identical or similar functions, the same reference numerals will be used in the following for the sake of clarity. For the basic description of Compressed air supply system 1000 ' will be on the description of 1 directed. The following is the modified embodiment of the air dryer arrangement 100 ' and their connection to the compressed air supply system 1000 ' explained.

In the present case, the from a compressed air flow of the pneumatic main 200 at the control terminal 252 in the control line 250 derived control compressed air via another control connection 253 at the line section 251 the control line 250 in another control line 254 diverted. Ie. the further control line 254 is via the control line 250 and the pipe section 251 supplied with control compressed air when the control valve 320 goes into the open position. In the case with the pressurization of the piston 314 also a pneumatic element 190 assigned control piston 198 pressurized. The pneumatic element 190 is present in the form of a throttle 199 formed with adjustable nominal diameter, wherein the nominal diameter by means of a dependent of the pressurization position of the control piston 198 is adjustable.

The present variant of the pneumatic element 190 realizes the function of a throttle 199 with adjustable nominal diameter between the first and second air dryer stage 101 . 102 as a function of a flow direction of the compressed air flow DL. Specifically, in the air dryer arrangement 100 a nominal diameter of the throttle 199 in the filling BR a compressed air flow in the main pneumatic line 200 set differently than in the venting direction ER a compressed air flow in the pneumatic main line 200 ,

For the filling direction BR is the control valve 320 in a closed position and neither the piston 314 still the spool 198 for the throttle 199 is tax charged. The throttle 199 is thus in a first position with a nominal output width while the pilot operated check valve 311 the pneumatic main line only locks in the venting direction ER and the venting valve 312 the vent line 230 also locks. Ie. Compressed air from the air compressor 400 can in the filling direction BR on the air dryer assembly 100 ' and the pilot operated check valve 311 to the compressed air connection 2 to get promoted.

In the other case, a venting of the pneumatic system 1001 will both the piston 314 as well as the control piston 198 with control compressed air over the section 251 and the other control line 254 steuerdruckbeaufschlagt. This causes the vent valve 312 opens and the check valve 311 , is unlocked and the nominal size of the throttle 199 is changed by means of Steuerdruckbeaufschlagung the control piston 198 ,

Advantageously, thus for the regeneration of the air dryer arrangement 100 ' when flowing through a compressed air flow in the venting direction ER another - advantageously lower - nominal diameter for the throttle 199 be set as a dryer function of the air dryer assembly 100 ' , ie when flowing through a compressed air flow in the filling direction BR.

As can be seen from the details X2, Y2 of the view (A) of 3 it can be seen, to the intermediate connection 181 also a pneumatic element 190 like a valve 192 with a memory 193 or a water separator 194 - if necessary via one or more additional pneumatic connections 182 . 183 to the air dryer arrangement 100 and to the compressed air supply system 1000 be connected. As can be seen from the details X3, Y3, Z3 of the view (B) of 3 it can be seen, to the intermediate connection 181 also a pneumatic element 190 in the form of a sensor 190 ' like a pressure, humidity or temperature sensor 195 . 196 . 197 be connected, the sensor 190 ' in the present case is formed as a voltage sensor. In the event that no pneumatic element 190 at the intermediate connection 181 is connected, the intermediate connection 181 for example with an in 4 shown closure element 178 be closed in airtight.

Referring to the views (A), (B), (C) of 4 this shows the air dryer arrangement 100 with a drying container 140 , which has a connection flange 130 to the pneumatic main 200 can be connected. A printing plate assembly 160 with first and second perforated pressure plate 161 . 162 serves to hold together the dry granules, not shown. The first and second printing plate 161 . 162 is in each case via a compression spring 163 . 164 between the connection flange 130 and the pressure plate assembly 160 held under pressure on the dry granules.

The from the container outer wall 160 limited interior 154 is to form the first and second air dryer 101 . 102 in a first and second chamber 151 . 152 divided; this over a footbridge 150 , the present in the interior 154 arranged and with a first end 150.1 from a head side 171 the container outer wall 170 while preserving a passage 155 is spaced. The distance is chosen so that this is the formation of the aforementioned pneumatic connection 153 by means of the passage 155 allows, ie in the present case, the compressed air flow DL - as in 4 drawn in the area of the passage 155 and the pneumatic connection formed therewith 153 about flow reversal - essentially U-shaped from the first chamber 151 to the second chamber 152 guided. The pneumatic connection 153 is part of the aforementioned pneumatic tap 180 , In the present case is the passage 155 for the formation of the pneumatic connection 153 together with one at the passage 155 realized pneumatic element 190 - here an intermediate connection 181 who is still with a closure 178 is closed - in a pneumatic unit 185 combined. The pneumatic unit 185 is considered a querkern 179 in the form of a tubular extension of the container outer wall 170 formed of the drying container. In the quernunk 179 is a compressed air flow DL transverse to the compressed air flow DL in the first and second air dryer 101 . 102 feasible.

The other side 150.2 of the web is provided with a spring not shown in detail in a groove of the connecting flange 130 admitted. Incidentally, the connecting flange on unspecified inside attacks inside the container outer wall 170 held. The connection flange 130 is on a head side 172 the container outer wall 170 circumferentially and through the other bridge end 150.2 held in the middle. Specifically, the connection flange 130 a first opening 110 and a second opening 120 on, passing through the footbridge 150 associated web portion are separated, wherein the web portion of the groove taken by the spring 131 having. The first opening 110 realized in the circuit diagram of 1 in detail X1 shown first connection opening 203 to the drying container 140 , The second opening 120 realized in the circuit diagram of 1 in detail X1 shown second connection opening 204 to the drying container 140 ,

It has become in terms of the embodiment of the 2 shown that the passage 155 can be changed in its clear cross-section. About it can be a throttle 199 with adjustable nominal diameter according to the embodiment of the 2 being represented. This can be z. B. by inserting a nominal width changing element in the distance between the first end 150.1 of the bridge and the head side 171 the container outer wall 170 be implemented.

The views (B) and (C) of 4 further show the drying container 140 , The jetty 150 as such - or according to the aforementioned constructive modification concerning the 2 a guide for the web - includes substantially along a longitudinal extent E in one piece to the container outer wall 170 at. The interior 154 of the drying container 100 This will result in a first chamber 151 and a second chamber 152 divided. The present in each case as a cylindrical tube formed first and second chamber 151 . 152 are arranged side by side so that both, ie the first and second chamber 151 . 152 , through the jetty 150 and the container outer wall 170 are limited. Specifically, the first chamber points 151 a extending along the longitudinal extent E first boundary part, which extends through a first outer longitudinal side 173 the container outer wall 170 is formed. Sideways is the first chamber 151 through a first-chamber-side web inside of the web 150 and the first outer longitudinal side 173 limited. The second chamber 152 has a second boundary part extending along the longitudinal extent E, which in the present case has a second outer longitudinal side 174 the container outer wall 170 is formed. Laterally, the second chamber through a second chamber side web inside of the web 150 and the second outer longitudinal side 174 limited. Both the first and the second chamber 151 . 152 is on the upper side by a substantially along the longitudinal extension E extending third boundary part, namely an upper side 175 the container outer wall 170 limited. Both chambers 151 . 152 are also through an appropriate bottom 176 the container outer wall 170 bounded on the lower side. The jetty 150 connects here directly - in a modification regarding the 2 via a bridge guide indirectly the top 175 and the bottom 176 the container outer wall 170 along a substantial part of the longitudinal extent E. In the present case is the web 150 integral, ie integral to the top and bottom 175 . 176 connected.

Due to the substantially circular cylindrical tubular shape of the first and second chambers 151 . 152 the outer circumferential surfaces of the same run on the bridge 150 under the formation of the bridge 150 together, leaving an approximately 8-shaped pad 177 on the head side 172 the container outer wall 170 is formed. Under extension of the 8-shaped connection surface 177 are three eye holes 178.1 . 178.2 . 178.3 formed for attaching the air dryer assembly 100 on the housing assembly G of the compressed air supply system 1000 serve.

In view (B) of the 4 is the first and second chamber in the present embodiment 151 . 152 formed as single chambers with substantially equal internal volumes. The jetty 150 extends on one of the longitudinal extent E substantially centrally along the longitudinal axis M of the drying container 140 , In particular, according to the present embodiment, a first and second chamber axis K1, K2 adjacent and substantially parallel to the web 150 arranged the drying container, wherein the chamber axis K1, K2 each central to a chamber 151 . 152 and disposed along the longitudinal axis. A distance D1 or D2 of the chamber axis K1 to the longitudinal axis M or a second chamber distance D2 of the second chamber axis K2 to the central longitudinal axis M is the same here; ie, in the present embodiment, the two chambers 151 . 152 arranged with the same geometric shape, the same volume, equally spaced and equal to the central longitudinal axis M. In particular, one is light cross-section of a flow path Q1, Q2 as he as the opening of the approximately 8-shaped pad 177 recognizable for both chambers 151 . 152 formed equal.

View (B) of the 4 further shows that one at the height of the passage 155 along the longitudinal extent E in the container outer wall 170 opening intermediate connection 181 is formed. In the present case, the container outer wall 170 on the long side mentioned 174 an opening formed in an approximately tubular extension (transverse core 179 ) of the head side 171 the passage 155 and the opening via an intermediate connection line 186 combines. According to the detail Z1 of 1 is such a pneumatic unit 185 formed a tap 180 (here in the form of the pneumatic connection 153 ) in combination with the intermediate connection line 186 (here in the form of the quernunk 179 ) and the pneumatic element (here the intermediate connection 181 ) having. The closure 178 for the intermediate connection 181 is formed in the present case by a nut screw and can be performed by the way by any other suitable pressure-resistant closure or plug.

In particular, in an alternative embodiment, an intermediate connection 181 also be formed in other ways. The pneumatic connection 153 may in a modified embodiment as a mere passage in the web 150 also elsewhere in the drying container 140 be formed.

5 shows - again to the implementation for an in 1 shown compressed air supply system 1003 or for connecting a pneumatic system shown there 1001 - A modified compressed air supply system 1000 '' , in turn, essentially the compressed air supply system 1000 of the 1 is modeled. For identical or similar features or characteristics of identical or similar functions of the compressed air supply system 1000 ' In the present case, the same reference numerals are used for clarity and for the description of the 1 directed. The following are the differences of the compressed air supply system 1000 '' to the previously described compressed air supply systems 1000 and 1000 ' explained.

In addition to a modified air dryer arrangement 100 '' is here the air compressor 400 ' two-stage with a first compressor stage 401 and a second compressor stage 402 - Each with a piston and a compressor chamber - formed, the pistons of a motor 500 are driven. In addition, in the present case, the air supply 0 with a vent connection 3 merged; This combined air supply and exhaust port is a common filter element and / or muffler 0.1 upstream. Accordingly, an air supply line branches 270 via another branch connection 241 from the vent line 240 from; this to guide sucked air through the filter 0.1 and the air supply connection 0 first in a connection section 242 the vent line 240 to the branch connection 241 and then into the air supply line 270 to the air compressor 400 ' , Subsequently, the air as compressed air to the compressed air supply 1 to the pneumatic main 200 issued.

The modified embodiment of the compressed air supply system 1000 '' is with a modified air dryer arrangement 100 '' educated. In this case, the first air dryer stage is present 101 with the first sub-line 103 ' and the second air dryer stage 102 with the second sub-line 104 ' in a pneumatic parallel circuit in the main pneumatic line 200 arranged. The first part line and the second part line 103 ' . 104 ' are present at a first pneumatic connection 105 and a second pneumatic connection 106 merged. In the embodiment shown here, the first and the second pneumatic connection 105 . 106 one pneumatic intermediate connection each 181 ' and 181 '' assigned. In a modification, either only at the first or only at the second pneumatic connection 105 . 106 a pneumatic intermediate connection 181 ' . 181 '' be provided. In particular, at least one, preferably both, of the intermediate connections 181 ' . 181 '' a pneumatic element 190 - For example, as in the previously described embodiments of 1 to 4 explained - be arranged and / or connected.

The first and second pneumatic connection 105 . 106 In this case has a pneumatic element 190 in the form of a branch of the pneumatic main 200 in a first sub-line 103 ' and a second sub-line 104 ' on. A first branch line is here through the aforementioned first part line 103 and a second branch line is formed here by the aforementioned second part line. Both the first and the second air dryer stage 101 . 102 can by means of a substantially based on the 4 shown first and second chamber 151 . 152 be formed, which are arranged in pneumatic parallel connection to each other in the branch lines. In that case, the in 4 shown drying container can be varied constructively in a suitable manner to both sides each have an intermediate connection 105 . 106 for the first and second chambers 151 . 152 provide; z. B. by on the aforementioned head page 171 the drying container suitable openings (eg similar to the openings 110 . 120 on the other side of the head 172 of the drying container 140 ) are provided. The modified embodiment of an air dryer arrangement 100 '' allows the corotating guidance of a compressed air flow DL along a longitudinal extent of the air dryer assembly 100 '' both in the first part line formed as a first branch line 103 ' and in the second sub-line designed as a branch line 104 '; ie in particular a co-current flow through the first and second chambers 151 . 152 along a longitudinal extent of the air dryer assembly 100 '' ,

LIST OF REFERENCE NUMBERS

0

Air supply, intake

0.1

Filter element, air filter

1

Compressed air supply

2

Compressed air connection

3

exhaust port

3.1

Vent filter, filter element, silencer

100

Air dryer assembly

101

first air dryer

102

second air dryer

103, 103 '

first sub-line

104, 104 '

second sub-line

105

first pneumatic connection

106

second pneumatic connection

110

first opening

120

second opening

130

flange

131

groove

140

dry container

150

web

150.1

first end

150.2

other bridge end

151

first chamber

152

second chamber

153

pneumatic connection

154

inner space

155

passage

160

Pressure plate assembly

161, 162

first and second pressure plate

163, 164

compression spring

170

Vessel wall

171, 172

head

173

outer longitudinal side

174

second outer longitudinal side

175

top

176

bottom

177

8-shaped connection surface

178

closure element

178.1, 178.2, 178.3

Auglöcher

179

cross core

180

pneumatic tap

180 '

intermediate terminal

181, 181 '

intermediate terminal

182, 183

additional pneumatic connections

185

pneumatic assembly

186

pneumatic intermediate connection line

190

pneumatic element

190 '

sensor

191

throttle

192

Valve

193

Storage

194

water

195

pressure sensor

196

humidity sensor

197

temperature sensor

198

spool

199

throttle

200

Pneumatic main line

201

first part of the pneumatic main

202

second part of the pneumatic main

203

first connection opening

204

second connection opening

230

Branch line, vent line

240

further vent line

241

another branch connection

242

connecting section

250

pneumatic control line

251

line section

252

control connection

253

another control connection

254

further control line

260

further vent line

261

branch port

270

Air supply line

300

Valve arrangement, solenoid valve arrangement

310

Way valve arrangement

311

check valve

312

vent valve

313

pressure relief

314

piston

314.1

Relay vent body

314.2

Relaisentsperrkörper

315

adjustable spring

320

control valve

321

control line

322

Kitchen sink

331

first throttle

332

second throttle

400, 400 '

air compressor

401

first compressor stage

402

second compressor stage

403

compressor stage

500

engine

600

pneumatic line

601, 602, 603, 604

Spring branch line

605

Storage branch line

610

gallery

1000, 1000 ', 1000' '

Compressed air supply system

1001

pneumatic system

1002

pneumatic element, water separator

1003

Compressed air supply system

1011, 1012, 1013, 1014

bellows

1110

manifold

1015

Storage

1111 to 1114

Magnetic storage-way valve

1115

Solenoid valve Air spring system

D1, D2

distance

e

longitudinal extension

G

housing arrangement

K1, K2

first and second chamber axis

M

longitudinal axis

Q1, Q2

Cross section of the flow path

X, Y

detail

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2005/051521 Al [0004]
• DE 102006037307 A1 [0004]
• EP 1048540 A1 [0005]
• EP 1233183 B1 [0006]

Claims (18)

Compressed air supply system ( 1000 . 1000 ' 1000 '' ) for operating a pneumatic system ( 1001 ), in particular an air suspension system of a vehicle, preferably a passenger car, with a compressed air flow, comprising: - an air dryer arrangement ( 100 . 100 ' . 100 '' ) in a pneumatic main line ( 200 ), which is a compressed air supply ( 1 ) from an air compressor ( 400 . 400 ' ) and a compressed air connection ( 2 ) to the pneumatic system ( 1001 ) pneumatically connects, and - one to the pneumatic main ( 200 ) pneumatically connected valve arrangement ( 300 ) for controlling the flow of compressed air, characterized in that - the air dryer arrangement ( 100 . 100 ' . 100 '' ) a first air dryer stage ( 101 ) in a first sub-line ( 103 ) of the pneumatic main line ( 200 ) and a second air dryer stage ( 102 ) in a second sub-line ( 104 ) of the pneumatic main line ( 200 ), wherein - the first and the second air dryer stage ( 101 . 102 ) via a pneumatic tap ( 180 ) are pneumatically connected, on which the first and the second sub-line ( 103 . 104 ), wherein - at the pneumatic tap ( 180 ) a pneumatic element ( 190 ) connected. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 1, characterized in that the air dryer arrangement ( 100 . 100 ' . 100 '' ) at least one pneumatic intermediate connection ( 181 . 105 . 106 ), which on the pneumatic tap ( 180 ) is connected, wherein at the pneumatic intermediate connection ( 181 . 105 . 106 ) another pneumatic element ( 190 ) connected. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 1 or 2, characterized in that the pneumatic tap ( 180 ) and the pneumatic element ( 190 ), in particular with a pneumatic intermediate connection ( 181 . 105 . 106 ), in a pneumatic assembly ( 185 ) between the first and second air dryer stage ( 101 . 102 ) is realized. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 3, characterized in that the compressed air flow (DL) in the pneumatic assembly ( 185 ), in particular in a pneumatic transverse core ( 179 ), transverse to the compressed air flow (DL) in the first and second air dryer stage (FIG. 101 . 102 ) is feasible. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 4, characterized in that the first air dryer stage ( 101 ) with the first sub-line ( 103 ) and the second air dryer stage ( 102 ) with the second sub-line ( 104 ) in a pneumatic series circuit in the pneumatic main line ( 200 ) are arranged and the compressed air flow (DL) successively between the first sub-line ( 103 ) and the second sub-line ( 104 ) via the pneumatic tap ( 180 ) and / or the pneumatic intermediate connection ( 181 . 105 . 106 ), in particular a pneumatic component ( 185 ), is feasible. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 5, characterized in that - the first air dryer stage ( 101 ) by means of a in the first sub-line ( 103 ) arranged first chamber ( 151 ) and the second air dryer stage ( 102 ) by means of a in the second sub-line ( 104 ) arranged second chamber ( 152 ) a pneumatic series connection of the first and second chambers ( 151 . 152 ) in the pneumatic main line ( 200 ), wherein - the first and the second chamber ( 151 . 152 ) via a passage ( 155 ) to form a pneumatic connection ( 153 ) are pneumatically connected such that the compressed air flow (DL) in the first and second chambers ( 151 . 152 ) along a longitudinal extent (E) of the air dryer arrangement ( 100 . 100 ' . 100 '' ) and in opposite directions. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 4, characterized in that the first air dryer stage ( 101 ) with the first sub-line ( 103 ) and the second air dryer stage ( 102 ) with the second sub-line ( 104 ) in a pneumatic parallel circuit in the pneumatic main line ( 200 ), wherein the first sub-line ( 103 ) and the second sub-line ( 104 ) at a first and second pneumatic connection ( 105 . 106 ) and at the first pneumatic connection ( 105 ) a first pneumatic tap and / or at the second pneumatic connection ( 106 ) A second pneumatic tap is arranged. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 7, characterized in that - the first air dryer stage ( 101 ) and the second air dryer stage ( 102 ) by means of a in the first sub-line ( 103 ) arranged first chamber ( 151 ) and the second air dryer stage ( 102 ) by means of a in the second sub-line ( 103 ) arranged second chamber ( 151 ) a pneumatic parallel connection of the first and second chambers ( 151 . 152 ), where - the first sub-line ( 103 ) as the first branch line and the second part line ( 104 ) as a second branch line to the pneumatic main line ( 200 ) and the first sub-line ( 103 ) of a first partial flow and the second partial line ( 104 ) from a second partial flow of compressed air flow (DL) separated along a longitudinal extent (E) of the air dryer assembly ( 100 . 100 ' . 100 '' ) and can be flowed through at the same time. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 8, characterized in that the pneumatic element ( 190 ) is variably adjustable and / or the first air dryer stage and the second air dryer stage ( 101 . 102 ) is selectively switchable to form a pneumatic series circuit or to form a pneumatic parallel circuit, in particular in the air dryer arrangement ( 100 . 100 ' . 100 '' ) a first and second chamber ( 151 . 152 ) in series or in parallel is switchable. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 9, characterized in that the pneumatic element ( 190 ) in the form of a throttle ( 199 ) on the pneumatic intermediate connection ( 181 ) and / or the pneumatic tap ( 180 ), in particular at the pneumatic connection ( 153 ), connected or arranged, in particular in the form of a throttle ( 199 ) with adjustable nominal diameter. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 10, characterized in that at the pneumatic intermediate connection ( 181 ) and / or on the pneumatic tap ( 180 ), in particular on a pneumatic connection ( 153 ), a sensor ( 190 ' ) is connected or arranged, in particular one or more sensors selected from the group consisting of: pressure sensor ( 195 ), Humidity sensor ( 196 ), Temperature sensor ( 197 ), Volume flow sensor. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 11, characterized in that at the pneumatic intermediate connection ( 181 ) and / or to the pneumatic tap ( 180 ), in particular on a pneumatic connection ( 153 ), a valve and / or an external consumer, in particular a pressure vessel ( 193 ) with upstream container valve ( 192 ), pneumatically connected or arranged. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 12, characterized in that at the pneumatic intermediate connection ( 181 ), on the pneumatic tap ( 180 ), in particular on a pneumatic connection ( 153 ), a water separator ( 194 ) is connected or arranged. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 13, characterized in that the air dryer arrangement ( 100 . 100 ' . 100 '' ) a drying container ( 140 ) with a container outer wall ( 170 ) and a jetty ( 150 ) along a longitudinal extent (E) of the drying container ( 140 ), wherein the web ( 150 ) one of the container outer wall ( 170 ) limited interior space ( 154 ) into a first and a second chamber ( 151 152 divides), and - the compressed air flow (DL) via a pneumatic connection ( 153 ), in particular passage ( 155 ), between the first and second chambers ( 151 . 152 ) and in the first chamber and the second chamber ( 151 . 152 ) along the longitudinal extent (E) is feasible, wherein - the web ( 150 ) along the longitudinal extent (E) to the container outer wall ( 170 ) and the interior ( 154 ) of the drying container ( 140 ) into a first chamber ( 151 ) and second chamber ( 152 ), which are arranged side by side and both through the bridge ( 150 ) and the container outer wall ( 170 ) are limited. Compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to claim 14, characterized in that the web ( 150 ) on one of the longitudinal extent (E) following substantially central longitudinal axis (M) of the drying container ( 140 ), the first and second chambers ( 151 . 152 ) have substantially the same chamber interior spaces, in particular the same cross-sections and / or lengths. Compressed air supply system ( 1003 ) with a pneumatic system ( 1001 ) and with a compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of the preceding claims for operating the pneumatic system ( 1001 ) with a compressed air flow, in particular an air suspension system of a vehicle, preferably a passenger car, wherein the pneumatic main ( 200 ) a compressed air supply ( 1 ) from an air compressor ( 400 ) and a compressed air connection ( 2 ) to the pneumatic system ( 1001 ) pneumatically connects. Vehicle, in particular a car, with a pneumatic system ( 1001 ), in particular an air spring system, and a compressed air supply system ( 1000 . 1000 ' 1000 '' ) according to one of claims 1 to 15 for operating the pneumatic system ( 1001 ) with a compressed air flow. Use of a compressed air supply system ( 1000 ) according to one of claims 1 to 15 for operating the pneumatic system ( 1001 ), in particular an air spring system, with a compressed air flow (DL) in a passenger car, in particular in an SUV.

Images