EP3728810A1

EP3728810A1 - Air connection adapter, and acoustic stage for a compressor

Info

Publication number: EP3728810A1
Application number: EP18811167.8A
Authority: EP
Inventors: Stefan Ehrmann; Sven Haase
Original assignee: Bayerische Motoren Werke AG
Current assignee: Bayerische Motoren Werke AG
Priority date: 2017-12-19
Filing date: 2018-11-19
Publication date: 2020-10-28
Also published as: WO2019120819A1; DE102017223129A1

Abstract

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

Description

Air connection adapter and acoustic level for a compressor

The invention relates to an air connection adapter for a compressor, in particular for a T urboladerverdichter in a motor vehicle, and an acoustic stage for adjusting an operating noise of the air duct of a compressor, a 5 Luftanschlussadaptersatz for use in a compressor of a turbocharger and a motor vehicle with a turbocharged internal combustion engine and more as a turbocharger, each turbocharger having a compressor with an acoustic stage from the set of acoustic stages.

The invention will be described below in the context of motor vehicles, in which the charge air of the internal combustion engine can be supercharged by means of at least one turbola derverdichter. 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 in a construction group two or more compressors are connected geometrically different 15 need.

In known, turbo-charged motor vehicles, an adaptation of the air guidance on the turbocharger compressor often entails time and cost-related changes to the compressor housing. This means in the most ten charging concepts that either an optimal connection of the Luftfüh-O ments on the compressor must be dispensed with or the high required for this wall must be accepted for each engine variant.

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-increasing efforts5 concerning identical-part strategies, the compressor housing, including its air-guiding interfaces (such as, for example, the compressor inlet and the compressor outlet), is frequently the case. also specified if the vehicle type multiple motorization variants and / or a charging concept with multiple compressors use.

So if an adjustment of the compressor geometry is undesirable, would remain as an alternative situation-specific adjustment of the air supply. Since these 5 dings also frequently in the sense of the common part strategy also standardized parts, such as standardized hose elements with predetermined constant diameters, resorting, this option is problematic, especially since here too for 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, that is to say 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, as well as by an acoustic stage having the features of claim 7, an air connection adapter set having the features of claim 8 and a power vehicle having the features of claim 9. Preferred embodiments of the invention are the subject of the dependent claims.

According to one aspect, an air connection adapter for a compressor, in particular for a T urboladerverdichter in a motor vehicle, 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 well as the charge air duct are formed, and which is out forms, with the clean air duct, the compressor inlet, the compressor outlet 5 and / or the charge air guide, in particular separated from the other Verbindun conditions to be fluid-tightly connected.

According to another aspect of the invention, an acoustic stage for adjusting an operating noise of the air duct of a compressor, comprising Air connection adapter according to an embodiment of the invention, as well as a Schubum air valve, which is accommodated on the SUV interface of the adapter component, and which is adapted to block the Schubumluftkanal depending on egg nem operating condition or at least partially release. According to a further aspect, an air connection adapter set, in particular an acoustic stage set, be provided for use with a compressor of a turbocharger, wherein the compressor has a predetermined geometry with respect to its clean air and charge air interface, in particular with respect to its compressor inlet laß and its compressor outlet. The air connection adapter set has a number of air connection adapters, each having identical fastening supply devices for attaching the air connection adapter to the compressor.

The various air connection adapters of the air connection adapter set differ from each other with regard to at least one of: i) an interface to the clean air duct and / or to the charge air duct; in 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 Kgs nen have a larger or smaller diameter. iii) a layout and / or arrangement of the SUV interface; Example, as a result of 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 types of venues, different characteristics of operating noise can be realized by means of the acoustic stage. v) an outer geometry of the adapter component beyond the fastening device, that is to say the geometry which 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 is preferably at each of the compressor another air connection adapter according to an embodiment of the invention, selected from a Luftanschlussadaptersatz according to an embodiment of the invention, see between the compressor on the one hand and the clean air supply and the Ladeluftzu management on the other hand, installed.

The invention is based inter alia on the idea that the clean air duct and the La deluftführung not directly connect 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 cut points are basically the same design, while its air-flow-side interfaces are adapted with respect to their position and orientation in the space and each other as well as with respect to their geometric design to the specific application case.

As a result, a vote of the air ducts on the one hand and the compaction age on the other hand can be achieved independently of an adaptation of the design of the compressor housing. The adaptation of the adapter component, depending on the thermal Requirements, for example, by machining or casting technology from an aluminum material or a plastic material can be made is a Vielfa ches less expensive than the adjustment 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 not be pushed further.

This is relevant, for example, in certain types of turbocharged combustion engines in which the charge air between the compressor of the turbocharger and, for example, the - then closed - damper 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 you re-accelerate (for example, after the new gear is engaged), it will take some time for the supercharger to accelerate back up to get the turbo effect of increased engine power is.

This operating situation is normally avoided in currently known vehicles by means of a diverter valve. The diverter valve is in the above-described operation, a channel between the air supply to the compressor and the air duct away from the compressor free, so that in the Luftzu management of high pressure described does not build up or can be built immediately abge. However, the pressure conditions in the air duct of the engine between Ver dense and engine not only affect the performance of the engine, son countries and its operating noise, as it is perceived by the driver of the vehicle or bystanders.

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

In the case of vehicle types which, by virtue of their properties, are intended to have a very sporty effect on their target audience, on the other hand the operating sound - the sound - of the vehicle is a subjectively very important factor in the evaluation of the motor vehicle. For example, a group of sporty drivers appreciate a so-called

"Blow-off" - or "pop-off" noise that occurs when pressure from the charge air guide via the diverter valve (which is why also blow-off or pop-off valve is called) is discharged into the clean air supply ,

But even beyond these different target groups, it may be desirable to be able to influence the operating noise of the vehicle with regard to the noise that arises in the air guide in the area of the compressor, depending on the preference of the target groups addressed. Therefore, in the sense of the described aspect of the invention, the suitably designed Luftab final adapter in combination with the built-in diverter valve and over-5 speech channel referred to as acoustic stage.

The adaptation 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 greater power ratings of the powered engine through a suitable diverter valve, which can be actuated, for example, electrically and / or pneuma table.

In order to prevent the switching of a higher gear a rattling noise by the standing wave in the above-described pressure build-up and / or to allow a "blow-off" noise, according to a version between tween the clean air duct and the charge air duct a Schubumluftkanal (also as Crosstalk channel) 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 diverting duct in dependence 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 its compressor inlet and its Ver exhauster outlet, according to one embodiment, the adapter component on a fastening device which is set up 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 adapt the interfaces to the particular application, has in different embodiments, at least one of the mounting device, an interface to the clean air duct and an interface for charging air duct a VDA coupling, a connector with an X-ring and / or a screw with at least one O-ring on, if necessary separately for each id = id-to-be-formed air duct interface.

The adapter component may have in alternative embodiments, in particular depending on the intended temperature load, an aluminum material and / or a plastic material. 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 is an oblique view of a hand sketch of an acoustic stage according to a

Embodiment of the invention, installed on a compressor of a turbola ders;

2 in a front view (section A - A) and a side view (Schnit

B - B) the acoustic stage of Fig. 1; and

FIG. 3 shows a frontal view of the acoustic stage from FIG. 1 in a sectional plane (C - C) passing through the thrust air duct.

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

The air connection adapter 1 has an adapter component 8. The adapter component 8 is connected by means of a fastening device 9, which in the embodiment screws 1 1.1, 1 1.2 and 1 1 .3 (see also FIG. 2) connected to a compressor housing 3 of the compressor such that the air guide interfaces are fluid-tight. From the adapter member 8, in particular from the body 10, a clean air duct 12 and a charge air duct 14 is excluded.

The clean air duct 12 is fluid-tightly connected to the compressor inlet 4 in the representation of FIG. 1. In addition, the clean air duct 12 is adapted to be fluid-tightly connected to a clean air duct, not shown, at its end remote from the compressor for Zufüh tion of clean air. The clean air duct 12 has an inner diameter, the play in Ausführungsbei at least substantially the inner diameter of the clean air duct, not shown, and / or the inner diameter of the compressor inlet 4 ent speaks. To influence the acoustic properties of the air supply to the combustion engine, however, suitable noise-causing Topo logiemerkmale such as steps, recesses, protrusions o. Ä. In Ka can be arranged.

The charge air duct 14 is fluid-tightly connected to the compressor outlet 6 in the illustration of FIG. 1. In addition, the charge air duct 14 is adapted to be fluid-tightly connected to 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, which in Ausführungsbei play at least substantially the inner diameter of the charge air duct, not shown, and / or the inner diameter of the compressor outlet 6 corresponds. To influence the acoustic properties of the air supply to the United combustion engine, however, suitable noise-causing Topo logiemerkmale such as steps, recesses, projections o. Ä. Can be arranged in Ka channel.

The adapter component 8 also has an SUV interface 16. At the SUV interface 16 of the adapter component 8 a in the embodiment electrically ak- tuiertes diverter valve (eSUV) 18 is arranged. The eSUV 18 is equipped to block or at least partially release a propulsion air duct, not shown in FIG. 1 (see reference numeral 20 in FIG. 3).

By a known use of the eSUV 18 for short circuit of then pressurized charge air duct 14 with the clean air duct 12 can in the operating conditions described one operating noise of the motor ve hicle, and in particular the operating noise of the air supply to Burn tion engine, according to the wishes of the vehicle users Target group are influ- influenced, 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.

FIG. 2 a shows the acoustic stage 100 from FIG. 1 in a frontal view along the section A - A shown in FIG. 2 b, wherein in particular the fastening of the adapter component 8 to the compressor housing 3 by means of the screws 11 and the arrangement of the eSUV 18 on the Adapter component 8 becomes clear.

In the illustration of Fig. 2b, which shows a side view of the acoustic stage 100 along the drawn in Fig. 2a section B - B, the air duct in the compaction ter 2 to the compressor outlet 6 and the arrangement of the eSUV 18 in the region of the compressor outlet 6 is clear to recognize.

As shown in Fig. 1, only the front compressor housing 3 with the interfaces to the Luftanschlussa adapter 1 is shown in Fig. 2 of the compressor 2 and the turbocharger.

Because of the sectional view along the section C - C shown in FIG. 2 b, FIG. 3 clearly shows the mode of operation of the air connection adapter 1, in particular with regard to the diverter valve 18: if gas is taken off, it builds up in the air Charge air duct and there with 14 in the charge air duct pressure. This is detected by means of a pressure sensor and / or by means of an engine operating model, whereupon a control unit (not shown) controls the diverter valve 18 in such a way that it releases the diverter-piston duct 20.

Thereupon, the charge air under the pressure of the charge air duct flows out of the charge air duct 14 via the thrust air duct 20 into 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 pressure La released in this way can be vented flow into the clean air duct 12.

This crosstalk operation prevents the formation of a standing wave in the charge air supply and the associated chattering noise, as well like 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, which can be influenced as desired by a suitable design of the diverter-air channel 20 and / or by a suitable choice of the valve 18. The air connection adapter 1 (regardless of whether it together with a

From the figures 1 to 3 can be part of a Luftanschlussadapterssatzes, in which case all Luftan final adapter of this set in its interface also shown compressor housing 3 are identical. The air connection adapter 1 of the set, however, differ from each other in terms of 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 In another embodiment, the air connection adapter 1 can also visibly an interface to the clean air duct and / or to the charge air duct, in terms of a geometry of the clean air duct and / or the charge air duct, out vis a design and / or arrangement of the SUV Interface, and / or differ with respect to a type of diverter valve.

LIST OF REFERENCE NUMBERS

1 air connection adapter

2 compressors

3 Compressor housing 4 Compressor inlet

6 Compressor outlet 8 Adapter component

9 fastening device

10 bodies

1 1 screws

12 clean air duct

14 charge air duct

16 SUV interface 18 Diverter valve 20 Diverting air duct

22 collecting recess 100 acoustic stage

Claims

1 . Air connection adapter (1) for a compressor (2), having the air connection adapter

- A clean air duct (12) for guiding clean air between a clean air management and a compressor inlet (4),

- A charge air duct (14) for guiding charge air between a compaction terauslass (6) and a charge air duct,

marked by

an adapter member (8) in which both the clean air duct (12) and the La deluftkanal (14) are formed, and which is formed with the clean air duct, the compressor inlet (4), the compressor outlet (6) and the La deluftführung be connected fluid-tight.

2. Air connection adapter (1) according to claim 1, characterized in that

the adapter component (8) has a fastening device (9) which is set up to form a fluid-tight connection between the clean air duct (12) and the compressor inlet (4) and between the compressor outlet (6) and the charge air duct (14).

3. Air connection adapter (1) according to one of the preceding claims, characterized in that

has at least one of the fastening device (9), an interface for clean air management and an interface for charge air duct a VDA clutch, a plug connection with an X-ring and / or a Schraubverbin tion with at least one O-ring.

4. Air connection adapter (1) according to one of the preceding claims, characterized in that

the adapter component (8) has an aluminum material and / or a plastic material.

5. 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 Schubum air duct (20) in the adapter component (8) is formed.

6. 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).

7. Acoustic stage (1) for adjusting an operating noise of the air duct egg nes compressor, comprising an air connection adapter according to claim 6, and characterized by

a diverter valve (18) which is received on the SUV interface (16) of the Adap terbauteils (8), and which is adapted to block the thrust air duct (20) in response to an operating condition or at least partially release.

8. Air connection adapter set for use with a compressor (2) of a turbocharger, wherein the compressor (2) has a predetermined geometry respects Lich its compressor inlet (4) and its compressor outlet (6), comprising a number of Luftanschlussadaptern (1), each identical fastening means (9), characterized in that

the different air connection adapters (1) of the kit differ in 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 diverter valve (18),

- An outer geometry of the adapter component (8) beyond the Befestigungsein direction (9).

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 egg nem 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.