DE102007021934A1 - Supercharger unit for internal combustion engine, has compressor wheel, which has multiple blades for combustion air intake, which are arranged on hub of the compressor wheel - Google Patents

Abstract

The supercharger unit has a compressor wheel (3), which has multiple blades (6) for the combustion air intake, which are arranged on a hub (5) of the compressor wheel. A through-flow annular channel (13) is arranged in the area of multiple blades for expansion or compression of combustion air, which has an inlet opening (14) and an outlet opening (15). The inlet opening is arranged between two of the blades and the outlet opening on a wheel back (8) of the compressor wheel.

Description

The The invention relates to a charger device for an internal combustion engine with a compressor having a compressor wheel, that for Combustion air intake has a plurality of first blades, which are arranged on a hub of the compressor wheel. Furthermore the invention relates to an internal combustion engine with such Loader device.

From the DE 102 52 767 A1 an exhaust gas turbocharger with a housing and a running gear is known, wherein the housing comprises an air guide section. The rotor has a compressor wheel rotatably mounted in an inlet channel of the air guide section, with the aid of which combustion air is drawn in and compressed to an increased charge pressure. The compressed air is supplied to cylinders of an internal combustion engine. The compressor wheel is non-rotatably connected to a turbine wheel of the rotor, wherein the turbine wheel is rotatably positioned in an exhaust gas guide portion of the housing. The turbine wheel is acted upon by exhaust gases of the internal combustion engine and set in a rotational movement, wherein the rotational movement with the aid of a rotationally fixedly connecting the compressor to the turbine wheel shaft is transferable to the compressor wheel.

It Object of the present invention, the response of a Charger device for an internal combustion engine to improve. The invention is further based on the object, an internal combustion engine provide improved performance in particular having load connection.

These The object is achieved by a charger device which features Claim 1, and an internal combustion engine having the features according to claim 15, solved.

A Charger device according to the invention for a Internal combustion engine comprises a compressor, which is a compressor wheel having. The compressor wheel comprises for combustion air intake a plurality of first blades disposed on a hub of the compressor wheel are arranged. For expansion or compression of combustion air points the charger device a flow-through annular channel in Area of the majority of the first blades of the compressor, which Ring channel a first inlet opening and a first outlet opening has, wherein the first inlet opening between each at least two of the first blades and the first outlet opening is arranged on a Radrücken the compressor wheel. to Flow deflection is in the annular channel a plurality of two blades arranged. By this configuration can for a variety of Concepts of charging internal combustion engines improves the response become.

Prefers is the flowing through the annular channel partial gas flow means a flow cross-section variable device adjustable. The flow area variable device For example, a valve, a flap or a Variodiffusor be. The flow area may be from a maximum opening to a complete closure of the Ring channels are changed.

Next a main blading of the compressor is via the annular channel arranged a second blading in Radrücken. Dependent from the concept of the supercharger, besides one possible thereby Turbine blading also a customized compressor blading be performed. These are especially for a partial gas stream to be compressed advantageously usable. It will then a compressor with two compressor blades provided, the main blading for the air supply of the Engine and the internal combustion engine is designed and the second Compressor blading is provided via the annular channel, which in particular for the enforcement of a smaller Mass flow is used and to fulfill a specific operating behavior of the charging system is used.

The thus generated Zweistromrad, which also referred to as Euler wheel is, in this embodiment, then a compressor Zweistromrad, that for the compression or expansion of a partial gas flow a charging system is designed.

Prefers leads to the first outlet opening at the Radrücken a first flow channel in which the device for changing the flow cross-section is arranged.

It may also be provided that the device for change the flow cross-section directly at the first outlet opening is arranged on Radrücken. In this embodiment no additional feed channel from the first exit port towards this device is required and this supply channel then integrated directly into the compressor. The shorter the distance between the first outlet opening at Radrücken and the device for changing the flow cross-section is, the more advantageous it is for the performance.

Preferably, in the annular channel of the partial gas stream is compressible to a pressure level which is between a compressor inlet level and a compressor outlet level of the gas stream. The This dual-flow impeller with the additional channel designed as an annular channel is then particularly advantageous in compression of a partial gas flow and is thus preferably used within the supercharging system when the partial gas flow is to be conveyed to a pressure level which is above the compressor inlet level and below the compressor outlet level.

hereby offers the compressor with the twin impeller and the annular channel in Radrücken an intermediate pressure level, the efficiency low without larger throttle losses can be served.

Preferably For example, the charger device can be designed as a mechanical supercharger, in particular a compressor be. Is thus no turbocharger turbine available and should be analog to the compressor motors only a mechanical or possibly electric centrifugal compressor drive for the air supply can be provided here, too, the use of this Zweistromrads with the main channel and the ring channel an improvement of the response allow the charging system.

Especially It proves to be preferable, if the charger device as exhaust gas turbocharger is trained. In particular, it is then provided that the charger device a running tool and a housing comprising an air guide section, comprises an exhaust gas guide section and a bearing section, wherein the air guide portion and the exhaust gas guide portion are designed to flow through and the running gear a compressor wheel, a turbine wheel and a compressor wheel with the turbine wheel rotationally fixed connecting shaft includes. The compressor wheel is in the air guide section, the turbine wheel in the exhaust guide section and the shaft rotatably mounted in the bearing portion, wherein the turbine of exhaust gas acted upon is designed and a result of the admission initiated rotary motion using the shaft to the compressor wheel transferable is, wherein the compressor wheel for combustion air intake a Comprises a plurality of the first blades, which on the hub of the Compressor are arranged.

is the charger device is designed specifically as an exhaust gas turbocharger, so also here in the blading via the annular channel provided an expansion or compression of combustion air be.

Especially it proves to be preferable if for the compression of combustion air the flow-through annular channel in the region of the majority of the first Shovels is arranged, which annular channel is the first inlet opening and the first exit opening, wherein the first Inlet opening between in each case at least two of the first Buckets and the first outlet at the Radrücken the compressor wheel is arranged, and for flow deflection in the annular channel, the plurality of second blades is arranged.

in the Operation of an internal combustion engine, especially at low loads and speeds, it is thus possible using the ring channel, the energy of the combustion air depends on the conceptual Design of the charger to compress or expand and thereby improve the responsiveness of the charging system to be able to.

Prefers is a second flow channel with the device for Change in the flow cross-section connected and flows downstream of an exhaust aftertreatment device in an exhaust tract.

Becomes For example, in the cold start phase of gasoline engines unburned Additional air required for the exhaust aftertreatment device, so allows the annular channel with the on the blade design the second blades tuned pressure ratio the Blowing additional air into the exhaust gas upstream of the catalytic converter or the exhaust aftertreatment device, in which opposite the environment increased pressure level.

to Saving the previously required for gasoline engines recirculation valve at the compressor outlet for Pumpvermeidung in the switching phases is now the annular channel of the compressor with the downstream Device for changing the flow cross section used. Since the Pumpvermeidung through the opening of this Device for flow cross section change due to the design of the ring channel over a clear lower pressure ratio, become energetically noticeable set more favorable conditions. The advantageous energetic Effect will be in a slower drop in turbocharger speed during the now existing Umblasephase show.

In addition to the advantageous use of the Zweistromrads the compressor of the charger device according to the invention in the transient switching operations of the annular channel is also adjustable as Antipumpmaßnahme at the high quasi stationary engine loads, in particular rule or possibly controllable in a simpler manner. By dosed opening the device for flow cross-section change the required throughput increase at the first inlet opening of the annular channel is so bewerkstelligbar that a compressor pumps can be avoided. The two-flow impeller according to the invention can also be combined with the compressors used in commercial vehicles standard inlet-side recirculation openings on the Radaußenkontur or other antipumping measures, if this combination brings an improvement in terms of loss small maintenance.

at a configuration as exhaust gas turbocharger is preferably provided that on the turbine side a flow cross section variable Geometry, for example also a blow-off device for performance and running control of the engine, can be used.

The different adjustment units up to the device for Change of the flow cross-section, by means of which the partial gas flow through the annular channel is adjustable, be with a central control and regulation device for the internal combustion engine with respect to the stationary and discontinued behavior.

Prefers it can be provided that the compressor wheel and / or the shaft, on which the compressor wheel and the turbine of the turbocharger are located, can be driven by an auxiliary drive. If the variable turbine side the needs of the air supply requirements thus can not fully satisfy an additional Drive can be enabled via this auxiliary drive.

Also when the charger device is designed as an exhaust gas turbocharger is, can be provided that for the expansion of combustion air the flow-through annular channel in the region of the majority of first blades is arranged, which annular channel, the first inlet opening and the first exit opening, wherein the first Inlet opening between in each case at least two of the first Buckets and the first outlet at the Radrücken the compressor wheel is arranged, and for flow deflection in the annular channel, the plurality of second blades is arranged.

Prefers is a second flow channel with the device for Change in the flow cross-section connected and flows into the environment or into one at the other end Compressor inlet. Thus, by the secondary flow shoveling over the annular channel no pressure increase carried out but only an expansion, this can cause a recirculation to the compressor inlet or possibly a direct outflow into the environment. In particular, this is with regard to a Antipump measure in the high, quasi-stationary Motor loads advantageous. The realization of a turbine blading in the compressor wheel hub body performs during expansion to an energy recovery that is in the overall system the standard measure as a positive effect regarding associated with a reduction in consumption.

Prefers can be provided that the charger device as a two-stage Charging system is formed. In such a two-stage Charging is a second flow channel with the device connected to change the flow cross-section and downstream of a high pressure turbine of a first compressor turbine system opening into a connecting tract, wherein the connecting tract between the high pressure turbine of the first compressor turbine system and a low pressure turbine of a second compressor turbine system is arranged.

The Zweistromrad can therefore also in a two-stage charging system be used. At the high pressure level of the second stage of the exhaust gas turbocharger can blow over at certain stages or in engine operating ranges downstream of the high-pressure turbine in the connecting tract before the Low-pressure turbine by means of expansion in turbine blading be advantageous in the annular channel. These benefits mainly apply the consumption behavior in the partial load area as well as the ability the anti-dumping measure in the high load points by the Regulation of the opening cross section through the device to the flow cross section change.

One Another aspect of the invention relates to an internal combustion engine with a charger device according to the invention or an advantageous embodiment thereof.

The Internal combustion engine may include a fresh air line and an exhaust tract wherein, to improve the acceleration behavior the internal combustion engine designed as an exhaust gas turbocharger charger device comprising, wherein the air guide section in the fresh air line and the exhaust gas guide portion disposed in the exhaust tract are. This makes it possible, especially when load is applied to improve the operating behavior of the internal combustion engine.

embodiments The invention will be described in more detail below with reference to schematic drawings explained. Show it:

1 in a longitudinal section a compressor of a charger device according to the invention;

2 a first embodiment of a charging system;

3 a second embodiment of a charging system; and

4 a third embodiment of a charging system.

In The figures are the same or functionally identical elements with the provided the same reference numerals.

A Internal combustion engine has a fresh air line and an exhaust tract on. The internal combustion engine comprises a machine housing with a cylinder head and a crankcase. In the crankcase Cylinders are arranged, each cylinder an axially movable Piston has. Furthermore, in the crankcase a Crankshaft rotatably mounted. Each piston is using a connecting rod connected to the crankshaft so that relevant piston forces are transferable to the crankshaft and in a rotary motion the crankshaft can be implemented.

In the cylinder of the internal combustion engine are combustion chambers for Combustion of a fuel-air mixture formed. Every combustion chamber is of an inner wall of a cylinder, movable from the cylinder Piston and bounded by a wall of the cylinder head, wherein the wall of the cylinder head and the respective piston in about are arranged opposite one another. The separation spaces are variable in their volumes by means of the corresponding pistons designed so that it is a known combustion process can be carried out.

Of the Cylinder head includes an intake system with intake ports and intake valves, an exhaust system with exhaust ports and exhaust valves and an injection system for injecting Fuel in the associated combustion chamber, the fuel by means of a fuel pump from a fuel tank eligible is. Each inlet channel preferably has at least one Inlet valve on using the inlet port to open or to close and the inlet valve to a combustion chamber facing the end of the inlet channel is arranged. about the inlet channel is the combustion chamber with the inlet valve open Combustion air or a fuel combustion air mixture supplied. A combustion chamber facing away from the end of the inlet channel is with a Sump connected, which the fresh air line is assigned and serves a flow calming.

Everyone Outlet channel preferably has at least one outlet valve to open or close the exhaust duct is close, wherein the exhaust valve at one end of the Outlet channel is arranged, which faces the combustion chamber. In a combustion of fuel combustion air mixture formed in the combustion chamber arises during operation of the internal combustion engine exhaust gas, which over flow the exhaust passage from the combustion chamber into the exhaust tract can.

Of the Fritschluftstrang has a charge air line, wherein on a End of the charge air line, which faces the internal combustion engine is, the collection container is arranged. Upstream of the collection container is in the charge air duct intercooler for cooling positioned the sucked combustion air. A combustion air filter for cleaning the sucked combustion air is at the other End of the charge air duct arranged, which of the internal combustion engine is positioned away from the other.

Of the Exhaust tract comprises an exhaust manifold and an exhaust pipe, wherein the exhaust manifold exhaust ducts and a the Exhaust gas channels merging collecting channel has. The exhaust manifold is located downstream of the exhaust system, wherein each one exhaust passage is associated with an outlet channel. The exhaust pipe is at an opening of the collecting channel with the exhaust manifold connected, wherein the opening downstream of the exhaust ducts is positioned. At one end of the internal combustion engine the exhaust pipe is for exhaust aftertreatment an exhaust aftertreatment system arranged, wherein the exhaust aftertreatment system in the form of a soot filter and / or catalyst is formed.

The Internal combustion engine further includes an exhaust gas recirculation system on, between the exhaust manifold and the reservoir arranged a connecting line in the form of an exhaust gas recirculation line is. In the exhaust gas recirculation line is for cooling of recirculated exhaust gas an exhaust gas recirculation cooler arranged. A setting of a repatriated Exhaust gas quantity takes place with the aid of an exhaust gas recirculation valve.

to Control and control of many functions is the internal combustion engine associated with a regulatory and control system. About the Control and control system are in particular the fuel supply and the exhaust gas recirculation valve controllable.

at This embodiment is the internal combustion engine as a diesel engine formed and includes a trained as exhaust gas turbocharger charger device. The Invention can also be applied to gasoline engines. About that In addition, the charger device is not on the concept of exhaust gas turbocharging limited but can also be used for mechanical Loader, in particular compressors, be provided.

In 1 is a schematic longitudinal sectional view of a section of a charger device shown, which is a compressor 1 includes. The compressor 1 includes a housing 2 in which a compressor wheel 3 is arranged for sucking and compressing combustion air. The compressor wheel 3 is about a rotation axis 4 rotatably mounted.

The compressor wheel 3 includes a hub 5 and one on the hub 5 arranged plurality of first shovels 6 , Each of the first blades 6 has a blade outlet edge 7 on. To the first blades 6 adjoining points the compressor wheel 3 a Radrücken 8th on.

In an air duct section of the housing 2 is the compressor wheel 3 in a first wheel chamber 9 rotatably positioned. Upstream of the first wheel chamber 9 is an inflow channel 10 arranged in the air guide section, wherein the inflow channel 10 and the compressor wheel 3 are preferably arranged coaxially. The inflow channel 10 serves to condition the compressor wheel 3 sucked combustion air.

Downstream of the first wheel chamber 9 is in the air guide section an outflow channel 11 formed in the form of a diffuser, which for conditioning of the compressor wheel 3 sucked and compressed combustion air is designed. The outflow channel 11 is at his from the first wheel chamber 9 opposite end of the air duct belonging to the first spiral channel 12 connected, which serves to provide a rotationally symmetrical flow. Furthermore, the first spiral channel 12 as a connecting channel between the discharge channel 11 and an outlet channel formed in the air guide section.

The compressor wheel 3 also has a flow-through annular channel 13 with a first entrance opening 14 and a first exit opening 15 on. The first entrance opening 14 is between at least two of the first blades 6 positioned. The first outlet 15 is at the Radrücken 8th arranged. In the ring channel 13 is a plurality of second blades 16 fixed.

Depending on the configuration of the charger device and the systemic use can also be the design of the annular channel 13 and the second blades disposed therein 16 be designed systemic. In addition to the main blading of the compressor 1 over the first blades 6 can thus a second blading in Radrücken 8th over the second blades 16 in the ring channel 13 be enabled.

The second blading in the Radrücken 8th of the compressor 1 may be a turbine blading. This is provided when the charger device is designed as an exhaust gas turbocharger.

In addition to such a turbine blading, an adapted compressor blade can be carried out, in particular for a partial gas stream to be compressed, which through the annular channel 13 is conductive, is advantageous.

With the compressor 1 Therefore, two compressor shovels are possible, the main blading on the first blades 6 is designed for the air supply of the internal combustion engine and the second compressor blade via the second blades 16 intended to fulfill a specific operating behavior of the charging system.

The thus formed Zweistromrad the compressor 1 can be used both for the compression or the expansion of a partial gas flow, which through the annular channel 13 flows, be designed. This can be achieved by the corresponding design and arrangement of the second blades 16 be achieved.

The partial gas stream passing through the annular channel 13 flows, can be in principle by a device 17 set, which for changing the flow cross-section in the region of the annular channel 13 or an associated and in particular to the first outlet opening 15 opening flow channel 18 is arranged.

The device 17 can be designed as a valve, as a flap or as an efficiency favoring Variodiffusor and change the flow cross-section from a maximum opening to a complete closure.

At the in 1 The embodiment shown is the device 17 spaced from the first exit opening 15 of the ring channel 13 arranged.

Likewise, however, it can be provided that the device 17 immediately at the first outlet opening 15 is arranged and thus the flow channel 18 in the compressor 1 is integrated.

The trained as a double impeller compressor wheel 3 of the compressor 1 is used to compress one through the annular channel 13 flowing partial gas flow within the supercharging system when the partial gas flow is to be promoted to a pressure level which is above the compressor inlet level I and below the compressor exit level II.

This offers the two-stream compressor 1 with the secondary channel or annular channel 13 in the Radrücken 8th an intermediate pressure level that can be operated efficiently without major throttling losses.

Such in 1 explained compressor 1 can be assigned to a charger device, which is designed as a mechanical supercharger, in particular as a compressor.

Likewise, however, it can also be provided that the compressor 1 a charger device supplied is arranged, which is designed as an exhaust gas turbocharger.

If an internal combustion engine has a charging device designed as an exhaust-gas turbocharger, then this device comprises a power tool 19 , which is the compressor wheel 3 for sucking and compressing combustion air, a turbine wheel for expansion of exhaust gas and a compressor wheel 3 with the turbine wheel rotatably connecting shaft 20 with the rotation axis 4 includes. The wave 20 is rotatably supported in the bearing portion of the exhaust gas turbocharger, which is positioned between the air guide portion and the exhaust gas guide portion. For the inflow of the exhaust gas into the exhaust gas guide section, an inlet channel is formed, which serves to condition the exhaust gas, which causes the turbine wheel to rotate during operation of the internal combustion engine. Preferably, the inlet channel is perpendicular to the axis of rotation 4 arranged.

Downstream of the inlet channel is a second in the exhaust gas guide section Spiral channel arranged, which to provide a rotationally symmetric Flow serves. Furthermore, the second spiral channel as a connecting channel between the inlet channel and an inflow channel formed of the exhaust gas guide section. Downstream of the second spiral channel the inflow channel is positioned, which in general designed to condition the flow of the exhaust gas is. For adjustable, operating point-dependent conditioning of the exhaust gas, a distributor is positioned in the inflow channel, which is designed adjustable.

Downstream the inflow channel is the second wheel chamber in the exhaust gas guide section arranged, wherein positioned in the second wheel chamber, the turbine wheel is. Downstream of the second wheel chamber is an outlet channel in the exhaust gas guide section arranged.

During operation of the internal combustion engine, the turbine wheel of the exhaust gas turbocharger is set into rotational motion as a result of being acted upon by the exhaust gas of the internal combustion engine, with the aid of the shaft 20 the compressor wheel 3 is also rotated so that it sucks in combustion air and compressed.

In order to keep a certain exhaust gas turbocharger speed at low loads and low rotational speeds of the internal combustion engine at a high speed level despite a low exhaust gas back pressure prevailing under these conditions, a semiaxial and / or radial flow of the compressor wheel is preferred 3 train. This can be done by using a semi-axial and / or radial on the compressor wheel 3 aligned flow channel can be realized. The combustion air flowing out of the flow channel hits the compressor wheel at high peripheral speed 3 , This so-called cold-air turbine operation of the charging device designed as an exhaust-gas turbocharger can be realized in operating states in which a negative pressure prevails in the cylinder intake system of the internal combustion engine, the pressure gradient at the compressor wheel 3 for driving the compressor wheel 3 is usable.

The air duct section 3 has a guide device for changing the flow of the compressor wheel 3 on, as for example by the in the DE 102 52 767 A1 can be formed by the actuator explained there with the locking member. The further explanation of the function of the compressor in this prior art should also be regarded as fully disclosed in the present application.

In 2 schematically a charging system A1 is shown. About an accelerator 21 can the operating state or the operating behavior of the internal combustion engine 22 to be influenced. This is about the rule and control system 23 detected.

The regulation and control system 23 is also to control or regulate the Abgasregisterkühlung with the intercoolers 24 and 25 educated.

Furthermore, it is about the control system 23 designed as an exhaust gas turbocharger charger 26 regulated. This charger device 26 includes in the embodiment according to 2 the compressor 1 according to the embodiment in 1 and a turbine 27 ,

With the compressor 1 is a compressor blade of the intercooler 25 carried out. Furthermore, the over the ring channel 13 funded partial gas flow over the first flow channel 18 , the device 17 for changing the flow cross-section and via a further flow channel 28 in an exhaust tract 29 before an exhaust aftertreatment device 30 introduced. The second flow channel 28 thus discharges before the exhaust aftertreatment device 30 in the exhaust tract 29 , At this exhaust tract 29 is also the turbine 27 coupled.

In this in 2 embodiment shown is in the annular channel 13 a compression of the partial gas flow is performed. Is in the cold start phase of the engine designed as a gasoline engine 22 unburned additional air for the exhaust aftertreatment device 30 needed, so allows the annular channel 13 of the compressor 1 with the adjusted by the blade design pressure ratio, the injection of additional air into the exhaust gas section 29 at a higher pressure level compared to the environment. To save the previously required in gasoline engines recirculation valve at the compressor outlet II for pump avoidance in the switching phases now the annular channel 13 with the downstream device 17 used. In addition to the advantageous use of the Zweistromrads the compressor 1 in the transient switching operations, this additional ring channel 13 can also be controlled or controlled as an anti-panic measure in the case of high, quasi-stationary engine loads. By metered opening of the device 17 is the necessary increase in throughput at the wheel inlet or at the first inlet opening 14 so bewerkstelligbar that a compressor pumps can be avoided.

On the turbine side 27a is a flow cross-section variable geometry, in particular a blow-off device for power or air control of the engine used.

The regulation and control system 23 is also for controlling or controlling the device 17 intended.

In a further embodiment it can be provided that additionally an auxiliary drive 31 is arranged. If the variable side of the turbine 27 can not fully meet the needs of the air supply requirements, an additional drive via this auxiliary drive 31 be provided.

In 3 another charging system A2 is shown. In contrast to the embodiment according to 2 is here in the ring channel 13 of the compressor 1 no compression of combustion air carried out, but an expansion. As further shown, the second flow channel becomes 28 not in the exhaust tract 29 opening arranged, but to the compressor entry 32 guided. In this expansion of the partial gas flow in the annular channel 13 Thus, a recirculation of the combustion air to the compressor 32 be performed. Likewise, however, it may also be provided that instead of the junction of the flow channel 28 in the compressor inlet 32 a direct outflow is provided in the environment. This has an advantageous effect on the antipump behavior. The realization of a turbine blading in the embodiment according to 3 In the compressor wheel hub body leads to an energy recovery in the expansion, which acts in the overall system over the standard measure as a positive effect in terms of consumption reduction.

In 4 Another charging system A3 is shown. This charging system A3 is formed in two stages. A trained as exhaust gas turbocharger first compressor-turbine system in the form of the charger device 26 is with a second compressor-turbine system in the form of also designed as an exhaust gas turbocharger second charger device 33 coupled. The two loaders 26 and 33 are considered as a charger device. The second charger device 33 includes a compressor 1' , which according to the embodiment in 1 is trained. In addition, a turbine 27 ' provided, which with the compressor 1' about a common wave 20 ' is coupled. The ring channel, not shown 13 of the compressor 1' is with the first flow channel 18 connected, which in the device 17 opens to change the flow cross-section. The exit of the device 17 is with the further flow channel 28 connected, which in a connecting tract 34 empties.

At the high pressure level of the second stage of the supercharging system A3, in certain phases or operating states of the engine or of the internal combustion engine 22 a blow-by downstream of the high-pressure turbine (turbine 27 ' ) in the connecting tract 34 in front of the low-pressure turbine (turbine 27 ) by means of the expansion in the turbine blading of the annular channel 13 of the compressor 1' be beneficial. These advantages relate to the consumption behavior in the partial load area as well as the ability of the anti-dumping measure in the high load pumps by regulating the opening cross-section of the device 17 ,

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10252767 A1 [0002, 0069]

Claims (15)

Charger device for an internal combustion engine ( 22 ) with a compressor ( 1 . 1' ), which is a compressor wheel ( 3 ), which for combustion air intake a plurality of first blades ( 6 ), which on a hub ( 5 ) of the compressor wheel ( 3 ) are arranged, characterized in that for expansion or compression of combustion air, a flow-through annular channel ( 13 ) in the region of the plurality of first blades ( 6 ), which has a first inlet opening ( 14 ) and a first exit opening ( 15 ), wherein the first inlet opening ( 14 ) between at least two of the first blades ( 6 ) and the first exit opening ( 15 ) on a Radrücken ( 8th ) of the compressor wheel ( 3 ) is arranged, and the flow deflection in the annular channel ( 13 ) a plurality of second blades ( 6 ) is arranged. Charger device according to claim 1, characterized in that through the annular channel ( 13 ) flowing partial gas flow by means of a flow cross-section variable device ( 17 ) is adjustable. Charger device according to claim 2, characterized in that the first outlet opening ( 15 ) a first flow channel ( 18 ) at the Radrücken ( 8th ) which, on the other hand, enters the device ( 17 ) opens to change the flow cross-section. Charger device according to claim 2, characterized in that the device ( 17 ) for changing the flow cross-section directly at the first outlet opening ( 15 ) on the Radrücken ( 8th ) is arranged. Charger device according to claim 2, characterized in that in the annular channel ( 13 ) the partial gas stream is compressible to a pressure level which is between a compressor inlet level (I) and a compressor outlet level (II). Charger device according to one of the preceding claims, which is designed as a mechanical supercharger, in particular a compressor is. Charger device according to one of the claims 1 to 5, which is designed as an exhaust gas turbocharger. Loading device according to claim 7, characterized in that it comprises a running tool ( 19 ) and a housing ( 2 ), which comprises an air guide portion, an exhaust gas guide portion and a bearing portion, wherein the air guide portion and the exhaust gas guide portion are formed through-flow, and the running tool ( 19 ) the compressor wheel ( 3 ), a turbine wheel and a compressor wheel ( 3 ) with the turbine wheel rotatably connecting shaft ( 20 ), wherein the compressor wheel ( 3 ) in the air guide section, the turbine wheel in the exhaust gas guide section and the shaft ( 20 ) are rotatably mounted in the bearing portion, wherein the turbine wheel is designed to be acted upon by exhaust gas and initiated as a result of the application of rotational movement by means of the shaft ( 20 ) on the compressor wheel ( 3 ) is transferable, wherein the compressor wheel ( 3 ) for combustion air intake a plurality of the first blades ( 6 ), which on the hub ( 5 ) of the compressor wheel ( 3 ) are arranged. Charger device according to claim 8, characterized in that for the compression of combustion air of the flow-through annular channel ( 13 ) in the region of the plurality of first blades ( 6 ) is arranged, which the first inlet opening ( 14 ) and the first exit opening ( 15 ), wherein the first inlet opening ( 14 ) between at least two of the first blades ( 6 ) and the first exit opening ( 15 ) on the Radrücken ( 8th ) of the compressor wheel ( 3 ) is arranged, and the flow deflection in the annular channel ( 13 ) the plurality of second blades ( 16 ) is arranged. Charger device according to claim 8 or 9, characterized in that a second flow channel ( 28 ) with the device ( 17 ) and downstream of an exhaust aftertreatment device ( 30 ) in an exhaust tract ( 29 ) opens. Charging device according to one of the preceding claims 7 to 10, characterized in that the compressor wheel ( 3 ) and / or the wave ( 20 ) by an auxiliary drive ( 31 ) are drivable. Charger device according to claim 7, characterized in that for the expansion of combustion air of the flow-through annular channel ( 13 ) in the region of the plurality of first blades ( 6 ) is arranged, which the first inlet opening ( 14 ) and the first exit opening ( 15 ), wherein the first inlet opening ( 14 ) between at least two of the first blades ( 6 ) and the first exit opening ( 15 ) on the Radrücken ( 8th ) of the compressor wheel ( 3 ) is arranged, and the flow deflection in the annular channel ( 13 ) the plurality of second blades ( 16 ) is arranged. Charger device according to claim 12, characterized in that a second flow channel ( 28 ) with the device ( 17 ) and at the other end into the environment or into a compressor inlet ( 32 ) opens. Charger device according to claim 12, characterized in that the charge is formed in two stages and a second flow channel ( 28 ) With the device ( 17 ) and downstream of a high-pressure turbine ( 27 ' ) of a first compressor-turbine system ( 26 ) in a connection tract ( 34 ) between the high-pressure turbine ( 27 ' ) and a low-pressure turbine ( 27 ) of a second compressor-turbine system ( 33 ) opens. Internal combustion engine with a charger device according to one of the preceding claims.