DE102012212173B4 - Use of an exhaust gas turbocharger with a compressor wheel on both sides as a low-pressure stage for multi-stage exhaust gas turbocharging - Google Patents
Use of an exhaust gas turbocharger with a compressor wheel on both sides as a low-pressure stage for multi-stage exhaust gas turbocharging Download PDFInfo
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- DE102012212173B4 DE102012212173B4 DE102012212173.0A DE102012212173A DE102012212173B4 DE 102012212173 B4 DE102012212173 B4 DE 102012212173B4 DE 102012212173 A DE102012212173 A DE 102012212173A DE 102012212173 B4 DE102012212173 B4 DE 102012212173B4
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
- F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
- F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/001—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel
- F02B37/002—Engines characterised by provision of pumps driven at least for part of the time by exhaust using exhaust drives arranged in parallel the exhaust supply to one of the exhaust drives can be interrupted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
- F02B37/162—Control of the pumps by bypassing charging air by bypassing, e.g. partially, intake air from pump inlet to pump outlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Supercharger (AREA)
Abstract
Mehrstufige Abgasturboaufladung für eine Brennkraftmaschine, wobei die Abgasturboaufladung (10,30) in Strömungsrichtung eines Abgases der Brennkraftmaschine (13) einen Hochdruckturbolader (14) und einen in Reihe nachfolgend angeordneten Niederdruckturbolader (16) aufweist, wobei ein Abgaskrümmer (17), eine Hochdruckturbine (18) des Hochdruckturboladers (14) und eine Niederdruckturbine (19) des Niederdruckturboladers (16) abgasführend miteinander verbunden sind, und wobei ein Niederdruckverdichter (21) des Niederdruckturboladers (16) in Strömungsrichtung einer Frischluft vor dem Hochdruckverdichter (22) des Hochdruckturboladers (14) angeordnet ist, dadurch gekennzeichnet, dass der Niederdruckverdichter (21) des Niederdruckturboladers (16) ein beidseitiges Verdichterrad umfasst, was bedeutet, dass der Niederdruckverdichter (21) zwei Rücken an Rücken angeordnete Teillaufrädern aufweist, die fest miteinander verbunden sind, wobei die Teillaufräder unterschiedliche Durchmesser aufweisen und die Niederdruckturbine (19) mindestens ein Axialturbinenlaufrad (19a) umfasst. Multi-stage exhaust gas turbocharger for an internal combustion engine, wherein the exhaust gas turbocharger (10, 30) has a high-pressure turbocharger (14) and a low-pressure turbocharger (16) arranged in series in the flow direction of an exhaust gas of the internal combustion engine (13), wherein an exhaust manifold (17), a high-pressure turbine (18) of the high-pressure turbocharger (14) and a low-pressure turbine (19) of the low-pressure turbocharger (16) are connected to one another in an exhaust-gas-conducting manner, and wherein a low-pressure compressor (21) of the low-pressure turbocharger (16) is arranged in the flow direction of fresh air upstream of the high-pressure compressor (22) of the high-pressure turbocharger (14), characterized in that the low-pressure compressor (21) of the low-pressure turbocharger (16) comprises a compressor wheel on both sides, which means that the low-pressure compressor (21) has two partial impellers arranged back to back, which are firmly connected to one another, wherein the Partial impellers have different diameters and the low-pressure turbine (19) comprises at least one axial turbine impeller (19a).
Description
Die Erfindung betrifft eine Verwendung eines Abgasturboladers mit einem beidseitigen Verdichterrad als Niederdruckturbolader in einer mehrstufigen Abgasturboaufladung sowie eine entsprechend ausgestaltete Abgasturboaufladung.The invention relates to a use of an exhaust gas turbocharger with a compressor wheel on both sides as a low-pressure turbocharger in a multi-stage exhaust gas turbocharging system and to a correspondingly designed exhaust gas turbocharging system.
Die
Aus dem Stand der Technik sind einstufige Abgasturboaufladungen speziell für Ottomotoren bekannt, die als einzige Aufladestufe einen Abgasturbolader mit einem beidseitigen Verdichterrad in Verbindung mit einer Axialturbine umfassen. Hiermit soll ein möglichst schnelles Anlaufen des Abgasturboladers erzielt und dessen Massenträgheitsmoment reduziert werden.Single-stage exhaust turbocharging systems specifically for gasoline engines are known from the state of the art. The only charging stage is an exhaust turbocharger with a compressor wheel on both sides in conjunction with an axial turbine. This is intended to enable the exhaust turbocharger to start up as quickly as possible and to reduce its mass moment of inertia.
Insbesondere für Dieselmotoren ist dagegen aus der
Derartige mehrstufige Abgasturboaufladungen bieten die Möglichkeit eine Beschleunigung der zugehörigen Brennkraftmaschine insbesondere aus dem Leerlauf heraus zu höheren Drehzahlen hin zu verbessern.Such multi-stage exhaust gas turbocharging offers the possibility of improving acceleration of the associated internal combustion engine, particularly from idle to higher speeds.
Nachteilig an den beiden genannten Anordnungen erweist sich trotz der getroffenen Maßnahmen insbesondere bei transienten Betriebszuständen ein dennoch wahrnehmbares langsames Hochlauffahrverhalten der Abgasturboaufladung , das zu spürbaren Nachteilen hinsichtlich einer Fahrdynamik des hiermit angetriebenen Fahrzeugs führt.A disadvantage of the two arrangements mentioned above is that, despite the measures taken, particularly in transient operating conditions, the exhaust gas turbocharging system still has a noticeable slow start-up behaviour, which leads to noticeable disadvantages with regard to the driving dynamics of the vehicle powered by it.
Aufgabe der Erfindung ist es daher, eine Abgasturboaufladung zu schaffen, die eine zusätzlich verbesserte Fahrdynamik ermöglicht.The object of the invention is therefore to provide an exhaust gas turbocharging system which enables additionally improved driving dynamics.
Diese Aufgabe wird gelöst mit einer mehrstufigen Abgasturboaufladung mit den Merkmalen des Patentanspruchs 1 sowie einer spezifischen Verwendung eines Abgasturboladers mit einem beidseitigen Verdichterrad als Niederdruckturbolader in einer mehrstufigen Abgasturboaufladung gemäß Patentanspruch 4. Weitere Ausführungsbeispiele ergeben sich aus den jeweils abhängigen Patentansprüchen.This object is achieved with a multi-stage exhaust gas turbocharger with the features of patent claim 1 and a specific use of an exhaust gas turbocharger with a compressor wheel on both sides as a low-pressure turbocharger in a multi-stage exhaust gas turbocharger according to patent claim 4. Further embodiments emerge from the respective dependent patent claims.
Demnach wird eine mehrstufige Abgasturboaufladung für eine Brennkraftmaschine bereitgestellt, wobei die Abgasturboaufladung in Strömungsrichtung eines Abgases der Brennkraftmaschine einen Hochdruckturbolader und einen in Reihe nachfolgend angeordneten Niederdruckturbolader aufweist, wobei ein Abgaskrümmer, eine Hochdruckturbine des Hochdruckturboladers und eine Niederdruckturbine des Niederdruckturboladers abgasführend miteinander verbunden sind, und wobei ein Niederdruckverdichter des Niederdruckturboladers in Strömungsrichtung einer Frischluft vor dem Hochdruckverdichter des Hochdruckturboladers angeordnet ist. Außerdem umfasst der Niederdruckverdichter des Niederdruckturboladers ein beidseitiges Verdichterrad.Accordingly, a multi-stage exhaust gas turbocharger is provided for an internal combustion engine, wherein the exhaust gas turbocharger has a high-pressure turbocharger and a low-pressure turbocharger arranged in series in the flow direction of an exhaust gas of the internal combustion engine, wherein an exhaust manifold, a high-pressure turbine of the high-pressure turbocharger and a low-pressure turbine of the low-pressure turbocharger are connected to one another in an exhaust-gas-conducting manner, and wherein a low-pressure compressor of the low-pressure turbocharger is arranged in front of the high-pressure compressor of the high-pressure turbocharger in the flow direction of fresh air. In addition, the low-pressure compressor of the low-pressure turbocharger comprises a compressor wheel on both sides.
Es wird also eine Abgasturboaufladung mit mindestens zwei oder mehr Aufladestufen beschrieben, wobei mindestens eine der Aufladestufen eine Hochdruckstufe mit dem Hochdruckturbolader und mindestens eine der Aufladestufen eine Niederdruckstufe mit dem Niederdruckturbolader ist.An exhaust gas turbocharging system with at least two or more charging stages is therefore described, wherein at least one of the charging stages is a high-pressure stage with the high-pressure turbocharger and at least one of the charging stages is a low-pressure stage with the low-pressure turbocharger.
Hierbei wird als Niederdruckturbolader ein Abgasturbolader mit einem beidseitigen Verdichterrad verwendet. Dies bedeutet, dass das Verdichterrad vereinfacht gesprochen aus zwei Rücken an Rücken angeordneten Verdichterrädern (Teillaufrädern) besteht, die fest miteinander verbunden sind. Die beiden miteinander verbundenen Verdichterlaufräder (beidseitiges Verdichterlaufrad) können kleiner ausgestaltet werden als ein einzelnes Verdichterlaufrad und weisen somit ein deutlich niedrigeres Massenträgheitsmoment auf. Vorzugsweise ist das beidseitige Verdichterlaufrad einstückig ausgebildet.An exhaust gas turbocharger with a compressor wheel on both sides is used as the low-pressure turbocharger. In simple terms, this means that the compressor wheel consists of two compressor wheels (partial impellers) arranged back to back that are firmly connected to one another. The two interconnected compressor wheels (compressor wheel on both sides) can be made smaller than a single compressor wheel and thus have a significantly lower mass moment of inertia. The compressor wheel on both sides is preferably made in one piece.
Die Verwendung derartiger beidseitiger Verdichterräder in Verbindung mit einer mehrstufigen Abgasturboaufladung speziell in dem Niederdruckturbolader bietet somit den Vorteil, durch das reduzierte Massenträgheitsmoment des beidseitigen Verdichterrades gezielt ein möglichst schnelles und besonders spontanes Anlaufen aus dem Leerlauf oder bei schnellen Lastwechseln speziell im Niederlastbereich zu bereitstellen zu können. Dies bietet die besondere Möglichkeit, eine Fahrdynamik gegenüber einer ausschließlichen Verwendung innerhalb einer einstufigen Abgasturboladeraufladung oder einem Hochdruckturbolader einer mehrstufigen Abgasturboladeraufladung maßgeblich zu verbessern.The use of such double-sided compressor wheels in conjunction with a multi-stage exhaust gas turbocharger, especially in the low-pressure turbocharger, offers the advantage of being able to provide the fastest and most spontaneous start-up possible from idle or during rapid load changes, especially in the low-load range, thanks to the reduced mass moment of inertia of the double-sided compressor wheel. This offers the special possibility of achieving driving dynamics that are better than those achieved exclusively within a single-stage exhaust gas turbocharger or a high-pressure turbocharger of a multi-stage to significantly improve exhaust gas turbocharging.
Ferner umfasst die Niederdruckturbine mindestens ein Axialturbinenlaufrad. Dieses Axialturbinenlaufrad ist zum Antrieb des beidseitigen Verdichterlaufrads auf derselben Welle angeordnet. Das Massenträgheitsmoment von Axialturbinenlaufrädern ist in der Regel deutlich niedriger als das von durchsatzgleichen Radialturbinenlaufrädern, so dass ein Gesamtmassenträgheitsmoment des entsprechenden Abgasturboladers weiter reduziert und ein spürbar dynamischeres Fahrverhalten des Fahrzeugs erzielt werden kann. Die beiden Teillaufräder weisen ferner unterschiedliche Durchmesser auf.The low-pressure turbine also includes at least one axial turbine impeller. This axial turbine impeller is arranged on the same shaft to drive the compressor impeller on both sides. The mass moment of inertia of axial turbine impellers is generally significantly lower than that of radial turbine impellers with the same throughput, so that the total mass moment of inertia of the corresponding exhaust gas turbocharger can be further reduced and noticeably more dynamic driving behavior of the vehicle can be achieved. The two partial impellers also have different diameters.
Entsprechend einer besonderen Ausführungsform kann die Abgasturboaufladung eine Hochdruckstufe und eine Niederdruckstufe umfassen, wobei in Strömungsrichtung des Abgases der Brennkraftmaschine ein erster und ein zweiter, parallel zueinander angeordneter Hochdruckturbolader als Hochdruckstufe und ein in Reihe danach angeordneter Niederdruckturbolader als Niederdruckstufe vorgesehen sind, wobei ein Abgaskrümmer, eine erste Hochdruckturbine des ersten Hochdruckturboladers und die Niederdruckturbine des Niederdruckturboladers abgasführend miteinander verbunden sind und der Abgaskrümmer mit einer zweiten Hochdruckturbine des zweiten Hochdruckturboladers wahlweise abgasführend verbindbar ist, wobei die zweite Hochdruckturbine und die Niederdruckturbine abgasführend miteinander verbunden sind und wobei der Niederdruckverdichter des Niederdruckturboladers in Strömungsrichtung einer Frischluft vor einem ersten Hochdruckverdichter des ersten Hochdruckturboladers und einem zweiten Hochdruckverdichter des zweiten Hochdruckturboladers angeordnet ist.According to a particular embodiment, the exhaust gas turbocharger can comprise a high-pressure stage and a low-pressure stage, wherein in the flow direction of the exhaust gas of the internal combustion engine a first and a second high-pressure turbocharger arranged parallel to one another are provided as the high-pressure stage and a low-pressure turbocharger arranged in series thereafter are provided as the low-pressure stage, wherein an exhaust manifold, a first high-pressure turbine of the first high-pressure turbocharger and the low-pressure turbine of the low-pressure turbocharger are connected to one another in an exhaust-gas-conducting manner and the exhaust manifold can be optionally connected to a second high-pressure turbine of the second high-pressure turbocharger in an exhaust-gas-conducting manner, wherein the second high-pressure turbine and the low-pressure turbine are connected to one another in an exhaust-gas-conducting manner and wherein the low-pressure compressor of the low-pressure turbocharger is arranged in the flow direction of fresh air upstream of a first high-pressure compressor of the first high-pressure turbocharger and a second high-pressure compressor of the second high-pressure turbocharger.
Eine weitere Ausführungsform sieht vor, dass der Niederdruckverdichter einen ersten Bypass aufweist, der gasführend mit dem bzw. den Hochdruckverdichtern) verbindbar ist, und die Niederdruckturbine einen zweiten Bypass aufweist.A further embodiment provides that the low-pressure compressor has a first bypass, which can be connected to the high-pressure compressor(s) in a gas-conducting manner, and the low-pressure turbine has a second bypass.
Insbesondere kann die Brennkraftmaschine ein Dieselmotor sein. Speziell bei Dieselmotoren wirken sich die beschriebenen Effekte in besonders vorteilhafter Weise aus, insbesondere aufgrund vergleichsweise geringer Betriebsdrehzahlen und höherer Aufladegrade des Dieselmotors gegenüber beispielsweise einem Ottomotor.In particular, the internal combustion engine can be a diesel engine. The effects described have a particularly advantageous effect on diesel engines, particularly due to the comparatively low operating speeds and higher charging levels of the diesel engine compared to, for example, a gasoline engine.
Zusammenfassend ist, wie bereits beschrieben, die Verwendung eines Abgasturboladers mit einem beidseitigen Verdichterrad, das heißt zwei Rücken an Rücken angeordnete Teillaufräder, die fest miteinander verbunden sind, als Niederdruckturbolader in einer mehrstufigen Abgasturboaufladung mit mindestens einer Hochdruckstufe und mindestens einer Niederdruckstufe besonders vorteilhaft. Die Teillaufräder weisen unterschiedliche Durchmesser auf.In summary, as already described, the use of an exhaust gas turbocharger with a compressor wheel on both sides, i.e. two partial impellers arranged back to back and firmly connected to one another, is particularly advantageous as a low-pressure turbocharger in a multi-stage exhaust gas turbocharging system with at least one high-pressure stage and at least one low-pressure stage. The partial impellers have different diameters.
Der Abgasturbolader umfasst ein Axialturbinenlaufrad. Insbesondere kann der Abgasturbolader ein Radialturbinenlaufrad umfassen. Außerdem ist es möglich, dass die mehrstufige Abgasturboaufladung zur Aufladung eines Dieselmotors ausgestaltet ist.The exhaust gas turbocharger comprises an axial turbine impeller. In particular, the exhaust gas turbocharger can comprise a radial turbine impeller. It is also possible for the multi-stage exhaust gas turbocharging to be designed to charge a diesel engine.
Die Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnungen anhand mehrerer Ausführungsbeispiele näher erläutert. Es zeigen:
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1 eine erste Anordnung eines Niederdruckturboladers mit einem beidseitigen Verdichterlaufrad in einer Abgasturboaufladung im Sinne der Beschreibung, und -
2 eine zweite Anordnung eines Niederdruckturboladers mit einem beidseitigen Verdichterlaufrad in einer Abgasturboaufladung im Sinne der Beschreibung.
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1 a first arrangement of a low-pressure turbocharger with a compressor impeller on both sides in an exhaust gas turbocharger as described, and -
2 a second arrangement of a low-pressure turbocharger with a compressor impeller on both sides in an exhaust gas turbocharging system within the meaning of the description.
Die Abgasturboaufladung 10 zeichnet sich dadurch aus, dass der Niederdruckverdichter 21 des Niederdruckturboladers 16 ein beidseitiges Verdichterlaufrad 24 umfasst. Jedes der beiden Teillaufräder der Verdichterlaufrades 24 wird hierbei von einer eigenen Luftzuführung angeströmt.The exhaust gas turbocharger 10 is characterized in that the low-pressure compressor 21 of the low-pressure turbocharger 16 comprises a compressor impeller 24 on both sides. Each of the two partial impellers of the compressor impeller 24 is supplied with air from its own air supply.
Entsprechend der dargestellten ersten Ausführungsform umfasst die Niederdruckturbine 19 ein Radialturbinenlaufrad zum Antreiben des beidseitigen Verdichterlaufrades 24.According to the first embodiment shown, the low-pressure turbine 19 comprises a radial turbine impeller for driving the double-sided compressor impeller 24.
Lediglich optional kann der Niederdruckverdichter 21 einen ersten Bypass 26 aufweisen, der gasführend mit den Hochdruckverdichtern verbindbar ist, und/oder die Niederdruckturbine einen zweiten Bypass 27 aufweisen. Ebenfalls optional können Ladeluftkühler 28, 29 in Strömungsrichtung nachfolgend zu dem Niederdruckverdichter 21 und/oder zu einem oder beiden Hochdruckverdichtern 22, 23 vorgesehen sein.Only optionally, the low-pressure compressor 21 can have a first bypass 26, which can be connected to the high-pressure compressors in a gas-conducting manner, and/or the low-pressure turbine can have a second bypass 27. Also optionally, charge air coolers 28, 29 can be provided downstream of the low-pressure compressor 21 and/or one or both high-pressure compressors 22, 23 in the flow direction.
Claims (5)
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DE102015203621A1 (en) * | 2015-03-02 | 2016-09-29 | Bayerische Motoren Werke Aktiengesellschaft | Two-stage turbocharger charging device for an internal combustion engine |
JP6481512B2 (en) * | 2015-05-27 | 2019-03-13 | 日産自動車株式会社 | Turbocharger |
DE102016212182B4 (en) | 2015-07-13 | 2023-11-16 | Ford Global Technologies, Llc | Turbocharger arrangement with compressors arranged in parallel and method for operating a turbocharger arrangement |
US10487757B2 (en) * | 2017-10-23 | 2019-11-26 | Ford Global Technologies, Llc | Method and system for air flow through an engine having compressors |
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DE102008030569A1 (en) | 2008-06-27 | 2009-12-31 | Bayerische Motoren Werke Aktiengesellschaft | Two-stage exhaust-gas turbocharger for internal combustion engine of vehicle, has low-pressure compressor with bypass line connected to high-pressure compressors in gas conducting manner, and low-pressure turbine with another bypass line |
WO2011005455A2 (en) | 2009-06-23 | 2011-01-13 | Honeywell International Inc. | Turbocharger with two-stage compressor, including a twin-wheel parallel-flow first stage |
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2012
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DE102008030569A1 (en) | 2008-06-27 | 2009-12-31 | Bayerische Motoren Werke Aktiengesellschaft | Two-stage exhaust-gas turbocharger for internal combustion engine of vehicle, has low-pressure compressor with bypass line connected to high-pressure compressors in gas conducting manner, and low-pressure turbine with another bypass line |
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