DE102017223129A1 - Air connection adapter and acoustic level for a compressor - Google Patents

Abstract

The invention relates to an air connection adapter (1) for an air duct of a compressor (2), comprising a clean air duct (12) for guiding clean air between a clean air duct and a compressor inlet (4), a charge air duct (14) for guiding charge air between a compressor outlet (2). 6) and a charge air guide, as well as an acoustic stage, an air connection adapter set and a motor vehicle.

Description

The invention relates to an air connection adapter for a compressor, in particular for a turbocharger compressor in a motor vehicle, and an acoustic stage for adjusting an operating noise of the air duct of a compressor, an air connection adapter set for use in a compressor of a turbocharger and a motor vehicle with a turbocharged internal combustion engine and more than one turbocharger Each turbocharger having a compressor with an acoustic stage from the acoustic stage set.

The invention will be described below in the context of motor vehicles, in which the charge air of the internal combustion engine can be charged by means of at least one turbocharger compressor. Regardless of the invention but also applicable to other air or gas compressor, especially if they are installed in a space-critical environment and / or if two or more compressors must be geometrically connected differently in an assembly.

In known, turbocharged motor vehicles, an adaptation of the air duct on the turbocharger compressor often involves time-consuming and cost-intensive changes to the compressor housing. This means in the known charging concepts that either must be dispensed with an optimal connection of the air ducts to the compressor or the high required effort for each engine variant has to be accepted.

Because of the high quality level on the one hand and the high cost pressure on the other hand in the development of vehicles in practice none of these options is desirable; on the contrary: in the context of the ever more comprehensive efforts for identical-part strategies, the compressor housing including its air-guiding interfaces (such as compressor inlet and compressor outlet) is often predefined even if several motorization variants and / or a supercharging concept with several compressors are used in the vehicle type.

So if an adjustment of the compressor geometry is undesirable, would remain as an alternative situation-specific adjustment of the air supply. Since, however, this also often common in the sense of the common part strategy and standardized parts, such as standardized hose elements with predetermined constant diameters, this option is problematic, especially since the effort would be undesirably large.

Against this background, it is an object of the invention to provide an improved connection of the air ducts, ie in particular the clean air duct and the charge air duct, to a compressor.

This object is achieved by an air connection adapter with the features of claim 1, and by an acoustic stage with the features of claim 7, an air connection adapter set with the features of claim 8 and a motor vehicle with the features of claim 9. Preferred embodiments of the invention are the subject of dependent claims.

According to one aspect, an air connection adapter for a compressor, in particular for a turbocharger compressor in a motor vehicle, is provided. The air connection adapter comprises: a) a clean air duct for guiding clean air between a clean air duct and a compressor inlet of the compressor, b) a charge air duct for guiding charge air between a compressor outlet of the compressor and a charge air duct, c) an adapter component in which both the clean air duct as also the charge air duct are formed, and which is designed to be fluid-tightly connected to the clean air duct, the compressor inlet, the compressor outlet and / or the charge air duct, in particular separately from the other connections.

According to another aspect of the invention, there is provided an acoustic stage for adjusting an operating noise of the air duct of a compressor comprising an air connection adapter according to an embodiment of the invention and a diverter valve received at the SUV interface of the adapter component and adapted to the diverter duct depending on an operating condition to block or at least partially release.

According to a further aspect, an air connection adapter set, in particular an acoustic stage set, for use with a compressor of a turbocharger is provided, wherein the compressor has a predetermined geometry with respect to its clean air and charge air interface, in particular with regard to its compressor inlet and its compressor outlet. The air connection adapter set has a number of air connection adapters each having identical attachment means for attaching the air connection adapter to the compressor.

• i) einer Schnittstelle zu der Reinluftführung und/oder zu der Ladeluftführung; beispielsweise kann die Schnittstelle mit einem größeren oder kleineren Durchmesser ausgebildet sein und/oder die Schnittstellen können sich hinsichtlich ihrer räumlichen Ausrichtung und/oder ihrer Verbindungsart unterscheiden.
• ii) einer Geometrie des Reinluftkanals und/oder des Ladeluftkanals; beispielsweise kann die Geometrie eines der Kanäle mit geeigneten, an sich bekannten geräuschverursachenden Topologiemerkmalen ausgestattet sein und/oder die Kanäle können einen größeren oder einen kleineren Durchmesser aufweisen.
• iii) einer Gestaltung und/oder einer Anordnung der SUV-Schnittstelle; beispielsweise kann durch unterschiedliche Gestaltung und/oder Anordnung der SUV-Schnittstelle eine Anbindung des SUV-Ventils die Verwendung eines bestimmten Ventiltyps unabhängig von der Einbauumgebung ermöglicht werden und/oder die Verwendung unterschiedlicher Ventiltypen ermöglicht werden.
• iv) einem Typ des Schubumluftventils; indem beispielsweise unterschiedliche Ventiltypen verwendet werden, können insbesondere unterschiedliche Charakteristika von Betriebsgeräuschen mittels der Akustikstufe realisiert werden.
• v) einer Außengeometrie des Adapterbauteils jenseits der Befestigungseinrichtung, sprich derjenigen Geometrie, die unabhängig von der Gestaltung der Befestigungseinrichtung beeinflusst werden kann; beispielsweise kann die Außengeometrie die des Adapterbauteils derart angepasst werden, dass mit derselben Kanalgeometrie und/oder derselben SUV-Schnittstelle ein Einbau an mehreren Verdichtern im Fahrzeug ansonsten unabhängig von den Bauraumbedingungen erfolgen kann.

The various air connection adapters of the air connection adapter set differ from each other in at least one of:

• i) an interface to the clean air duct and / or to the charge air duct; For example, the interface may be formed with a larger or smaller diameter and / or the interfaces may differ in terms of their spatial orientation and / or their connection.
• ii) a geometry of the clean air duct and / or the charge air duct; For example, the geometry of one of the channels may be equipped with suitable per se known noise-causing topology features and / or the channels may have a larger or smaller diameter.
• iii) a layout and / or arrangement of the SUV interface; For example, by different design and / or arrangement of the SUV interface a connection of the SUV valve, the use of a specific type of valve can be made independent of the installation environment and / or the use of different types of valves are made possible.
• iv) a type of diverter valve; For example, by using different valve types, different characteristics of operating noise can be realized by means of the acoustic stage.
• v) an external geometry of the adapter component beyond the fastening device, ie the geometry that can be influenced independently of the design of the fastening device; For example, the outer geometry of the adapter component can be adjusted so that with the same channel geometry and / or the same SUV interface installation on multiple compressors in the vehicle otherwise can be done regardless of the space requirements.

In another aspect, a motor vehicle is provided with a turbocharged internal combustion engine and more than one turbocharger, each with a compressor. In the motor vehicle, another air connection adapter according to an embodiment of the invention, selected from an air connection adapter set according to an embodiment of the invention, is preferably installed on each of the compressors between the compressor on the one hand and the clean air supply and the charge air supply on the other.

Among other things, the invention is based on the idea of not binding the clean air duct and the charge air duct directly to the compressor with its predetermined interfaces. This would bring a specification of the air duct interfaces as well as the diameter of the air duct with it.

Instead, an adapter component is used, the compressor-side interfaces are basically the same, while its air guide-side interfaces are adapted to their location and orientation in the space and each other as well as their geometric design to the specific application.

As a result, a coordination of the air ducts on the one hand and the compressor on the other hand can be achieved independently of an adaptation of the design of the compressor housing. The adaptation of the adapter component, which can be made depending on the thermal requirements, for example, by machining or casting from an aluminum material or a plastic material is much less expensive than the adaptation of the compressor housing.

If an air connection adapter is used, on which a diverter valve can be arranged, which in turn can open and close a Schubumluftkanal in the adapter component with suitable control means of a control unit, by means of such an air connection adapter also influencing the operating noise of the air duct to the adapter is possible; as well, a quick pressure reduction can be achieved in the charge air. If necessary, the driveability of the vehicle can be significantly improved by means of the rapid boost pressure reduction, because the engine can be prevented from being pushed forward.

This is relevant, for example, in certain types of turbocharged internal combustion engines in which the charge air between the compressor of the turbocharger and, for example, the - then closed - choke damper in case of sudden gas removal (such as when switching to a higher gear).

The associated pressure build-up in the charge air supply is undesirable because it brakes the compressor of the compressor. In addition, the turbine of the turbocharger is slowed down as a result. This, in turn, can lead to a pronounced "turbo lag": when re-accelerating (for example, after the new gear is engaged), it takes some time for the supercharger to accelerate again to the point where the turbo effect of increased engine power is available.

This operating situation is avoided in currently known vehicles normally by means of a diverter valve. The diverter valve is in the operating case described above a channel between the air supply to the compressor and the air duct away from the compressor free, so that in the air supply, the high pressure described does not build up or can be immediately reduced.

However, the pressure conditions in the air duct of the internal combustion engine between the compressor and engine not only affect the performance of the engine, but also its operating noise, as it is perceived by the driver of the motor vehicle or bystanders.

For vehicle types that are more elegant and / or luxurious due to their characteristics in their target audience, the operating noise described above are rather undesirable, so that the acoustic level should counteract by means of suitable control via the control unit noise during pressure release. By using the diverter valve in the acoustic stage, however, at least the potentially loudest noise is avoided by a standing wave in the pressure build-up described above.

In the case of vehicle types which, by virtue of their characteristics, are intended to have a very sporty effect on their target audience, on the other hand the operating noise-the sound-of the vehicle is a subjectively very important factor in the evaluation of the motor vehicle. For example, a group of sporty vehicle drivers estimates a so-called "blow-off" or "pop-off" noise that occurs when pressure from the charge air duct is via the diverter valve (which is also called the blow-off or pop-off valve) is) is discharged into the clean air supply.

But even beyond these different target audiences, it may be desirable, depending on the preference of the targeted audiences the operating noise of the vehicle with respect to the noise that arises in the air flow in the area of the compressor can influence. For this reason, in the sense of the described aspect of the invention, the suitably designed air termination adapter in combination with the built-in diverter valve and crosstalk channel is referred to as the acoustic stage.

The adjustment of the acoustic properties themselves can be done by means of various mechanisms of action, for example by adjusting the geometry of the clean air duct and / or the charge air duct, and optionally and in particular at higher rated power of the powered internal combustion engine by a suitable diverter valve, which are for example electrically and / or pneumatically actuated can.

In order to prevent a rattling noise when switching a higher gear through the standing wave in the above-described pressure build-up and / or to allow a "blow-off" noise, according to an embodiment between the clean air duct and the charge air duct a recirculating air duct (also as a crosstalk channel designated) formed in the adapter component. Preferably, the adapter component has an SUV interface for receiving a diverter valve. In order to block the thrust air duct or to release it completely or partially, according to one embodiment, a diverter valve is installed, which is accommodated on the SUV interface of the adapter component, and which is adapted to the thrust air duct depending on an operating condition, in particular of the internal combustion engine and / or an accelerator pedal, to block or at least partially release.

So that the air connection adapter can be connected to the, in particular standardized, compressor housing and in particular the compressor inlet and the compressor outlet, according to one embodiment, the adapter component has a fastening device which is adapted between the clean air duct and the compressor inlet and between the compressor outlet and the charge air duct to form a fluid-tight connection.

In order to be able to adapt the interfaces to the respective application, at least one of the fastening device, an interface for clean air guidance and an interface for charge air guidance has a VDA clutch, a plug connection with an X ring and / or a screw connection with at least one in different embodiments O-ring on, if necessary separately for each fluid-tight to be formed air duct interface.

The adapter component may have an aluminum material and / or a plastic material in alternative embodiments, in particular depending on the intended temperature load.

• 1 in einer Schrägansicht eine Handskizze einer Akustikstufe gemäß einer Ausführung der Erfindung, verbaut an einem Verdichter eines Turboladers;
• 2 in einer Frontalansicht (Schnitt A - A) und einer Seitenansicht (Schnit B - B) die Akustikstufe aus 1; und
• 3 in einer durch den Schubumluftkanal verlaufenden Schnittebene (C - C) eine Frontalansicht der Akustikstufe aus 1.

Other features, advantages and applications of the invention will become apparent from the following description taken in conjunction with the figures. They show, partly in a highly schematic representation,

• 1 an oblique view of a hand sketch of an acoustic stage according to an embodiment of the invention, installed on a compressor of a turbocharger;
• 2 in a frontal view (section A - A ) and a side view (Schnit B - B ) the acoustic level 1 ; and
• 3 in a section plane passing through the thrust air duct (FIG. C - C ) a frontal view of the acoustic stage 1 ,

In 1 is an acoustic stage 100 according to an embodiment of the invention with an air connection adapter 1 and an electric diverter valve 18 shown, with the air connection adapter 1 on a compressor 2 with standardized interfaces for connecting the acoustic stage 100 at a compressor inlet 4 for sucking in clean air and a compressor outlet 6 is attached fluid-tight for blowing out the charge air.

The air connection adapter 1 has an adapter component 8th on. The adapter component 8th is by means of a fastening device 9 , which screws in the exemplary embodiment 11.1 . 11.2 and 11.3 has (compare also 2 ), with a compressor housing 3 the compressor connected so that the air guide interfaces are fluid-tight. From the adapter component 8th , in particular from its body 10 , is a clean air duct 12 and a charge air duct 14 except.

The clean air duct 12 is in the representation of 1 with the compressor inlet 4 connected fluid-tight. In addition, the clean air duct 12 set up to be connected to a clean air duct, not shown, at its end remote from the compressor fluid-tight for supplying clean air.

The clean air duct 12 has an inner diameter, in the embodiment, at least substantially the inner diameter of the clean air duct, not shown, and / or the inner diameter of the compressor inlet 4 equivalent. For influencing the acoustic properties of the air supply to the internal combustion engine, however, suitable noise-causing topological features such as steps, recesses, projections or the like can be arranged in the channel.

The charge air duct 14 is in the representation of 1 with the compressor outlet 6 connected fluid-tight. In addition, the charge air duct 14 set up to be connected in a fluid-tight manner with a charge air duct, not shown, at its end remote from the compressor for the discharge of charge air.

The charge air duct 14 has an inner diameter, in the embodiment, at least substantially the inner diameter of the charge air guide, not shown, and / or the inner diameter of the compressor outlet 6 equivalent. For influencing the acoustic properties of the air supply to the internal combustion engine, however, suitable noise-causing topological features such as steps, recesses, projections or the like can be arranged in the channel.

The adapter component 8th also has an SUV interface 16 on. At the SUV interface 16 of the adapter component 8th is an electrically actuated diverting valve (eSUV) in the exemplary embodiment 18 arranged. The eSUV 18 is set to a in 1 not shown Schubumluftkanal (compare reference numerals 20 in 3 ) to block or at least partially release.

By a known use of the eSUV 18 to short the then pressurized charge air duct 14 with the clean air duct 12 can in the operating conditions described above, the operating noise of the motor vehicle, and in particular the operating noise of the air supply to the engine, be influenced according to the wishes of the vehicle user target group, in particular in the sense of a desired "blow-off" noise.

By the acoustic stage according to the embodiment, in particular, the "blow-off" noise itself can be influenced and adjusted as desired.

2a shows the acoustic level 100 out 1 in a frontal view along the in 2 B marked section A - A , wherein in particular the attachment of the adapter component 8th on the compressor housing 3 by means of screws 11 as well as the order of the eSUV 18 on the adapter component 8th becomes clear.

In the presentation of the 2 B , which is a side view of the acoustic stage 100 along the in 2a marked section B - B shows, is the air flow in the compressor 2 to the compressor outlet 6 and the order of the eSUV 18 in the area of the compressor outlet 6 clearly visible.

As in 1 is also in 2 from the compressor 2 and the turbocharger only the front compressor housing 3 with the interfaces to the air connection adapter 1 shown.

The 3 is because of the sectional view along the in 2 B drawn section C - C through the recirculating air duct 20 the functioning of the air connection adapter 1 , in particular with regard to the diverter valve 18 good to take: when gas is taken away, builds in the charge air duct and thus also in the charge air duct 14 Pressure on. This is detected by means of a pressure sensor and / or by means of a motor operating model, whereupon a control unit, not shown, the diverter valve 18 such that it controls the recirculating air duct 20 releases.

Thereupon the charge air under the pressure of the charge air duct flows out of the charge air duct 14 via the recirculating air duct 20 in a collecting recess 22 of the clean air duct 12 , At a transition into the actual clean air duct 12 (not in the cutting plane), the thus discharged, pressurized charge air in the clean air duct 12 stream.

This crosstalk operation prevents the formation of a standing wave in the charge air supply and the associated chattering noise, as well as the power loss of the engine. At the same time, it is possible to set a typical "blow-off" sound by means of the control unit, by a suitable design of the diverter diverter 20 and / or by a suitable choice of the valve 18 can be influenced as desired.

The air connection adapter 1 (regardless of whether it is combined with a diverter valve as the acoustic stage 100 is formed or not) from the 1 to 3 may be part of an air connection adapter set, in which case all the air connection adapters of this set in their interface also shown compressor housing 3 are identical. The air connection adapters 1 the set, however, differ from each other with respect to an external and / or internal geometry of the adapter component beyond the fastening device, in particular by a design of the channels 12 . 14 and or 20 and by the design of the outer geometry in the sense of a desired resonance behavior of the body 10 ,

In another embodiment, the air connection adapters 1 Also with regard to an interface to the clean air duct and / or to the charge air duct, with respect to a geometry of the clean air duct and / or the charge air duct, with respect to a design and / or arrangement of the SUV interface, and / or with respect to a type of diverter valve differ.

LIST OF REFERENCE NUMBERS

1

Air connection adapter

2

compressor

3

compressor housing

4

compressor inlet

6

compressor outlet

8th

adapter component

9

fastening device

10

body

11

screw

12

Clean air channel

14

Charge air channel

16

SUV interface

18

Diverter valve

20

Diverter channel

22

Sammelausnehmung

100

acoustic level

Claims (9)

Air connection adapter (1) for a compressor (2), the air connection adapter having - a clean air duct (12) for guiding clean air between a clean air duct and a compressor inlet (4), - a charge air duct (14) for guiding charge air between a compressor outlet (6) and a charge air duct, characterized by an adapter component (8), in which both the clean air duct (12) and the charge air duct (14) are formed, and which is formed with the clean air duct, the compressor inlet (4), the compressor outlet (6). and the charge air duct to be fluid-tightly connected. Air connection adapter (1) according to Claim 1 , characterized in that the adapter component (8) has a fastening device (9), which is arranged between the clean air duct (12) and the compressor inlet (4) and between the compressor outlet (6) and the charge air duct (14) a fluid-tight connection train. Air connection adapter (1) according to one of the preceding claims, characterized in that at least one of the fastening device (9), an interface for clean air guidance and an interface for charge air duct a VDA coupling, a plug connection with an X-ring and / or a screw with having at least one O-ring. Air connection adapter (1) according to one of the preceding claims, characterized in that the adapter component (8) comprises an aluminum material and / or a plastic material. Air connection adapter (1) according to one of the preceding claims, characterized in that between the clean air duct (12) and the charge air duct (14) a thrust air duct (20) in the adapter component (8) is formed. Air connection adapter (1) according to Claim 5 , characterized in that the adapter component (8) has an SUV interface (16) for receiving a diverter valve (18). Acoustic stage (1) for adjusting an operating noise of the air duct of a compressor, comprising an air connection adapter according to Claim 6 and characterized by a diverter valve (18) received at the SUV interface (16) of the adapter member (8) and adapted to block or at least partially release the diverter duct (20) in response to an operating condition. An air terminal adapter set for use with a turbocharger compressor (2), the compressor (2) having a predetermined geometry with respect to its compressor inlet (4) and compressor outlet (6), comprising a number of air terminal adapters (1) each having identical fastening means (9 ), characterized in that the different air connection adapters (1) of the set differ with respect to at least one of: - an interface to the clean air duct and / or to the charge air duct, - a geometry of the clean air duct (12) and / or the charge air duct (14 ), - a design and / or an arrangement of the SUV interface (16), - a type of the diverter valve (18), - an external geometry of the adapter component (8) beyond the fastening device (9). Motor vehicle with a turbocharged internal combustion engine and more than one turbocharger, each with a compressor (2), characterized in that at each of the compressor (2) another air connection adapter (1) according to one of Claims 1 to 7 selected from an air connection adapter set according to Claim 8 , between the compressor (2) on the one hand and the clean air supply and the charge air supply on the other hand, is installed.

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