WO2012084567A1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
WO2012084567A1
WO2012084567A1 PCT/EP2011/072421 EP2011072421W WO2012084567A1 WO 2012084567 A1 WO2012084567 A1 WO 2012084567A1 EP 2011072421 W EP2011072421 W EP 2011072421W WO 2012084567 A1 WO2012084567 A1 WO 2012084567A1
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WO
WIPO (PCT)
Prior art keywords
turbine
exhaust gas
internal combustion
combustion engine
turbine runner
Prior art date
Application number
PCT/EP2011/072421
Other languages
German (de)
French (fr)
Inventor
Andreas Haimann
Original Assignee
Avl List Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Publication of WO2012084567A1 publication Critical patent/WO2012084567A1/en

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Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates to an internal combustion engine, for a vehicle, in particular for a racing vehicle, with at least one exhaust gas line in which at least one exhaust gas turbine of an exhaust gas turbocharger is arranged, wherein at least two turbine runners are arranged on a common shaft, wherein a separate exhaust gas flow path leads to each turbine run, with a switching valve for switching between the two exhaust gas flow paths. Furthermore, the invention relates to a method for operating this internal combustion engine.
  • US 4,339,922 A discloses an exhaust gas turbocharger with two turbine wheels, wherein a separate flow path leads to each wheel.
  • Each turbine has its own inlet spiral.
  • a control valve is arranged, with which either the exhaust gas flow can be fed to a single turbine runner or both turbine runners. This allows the advantages of a small-sized turbine and a large-sized turbine with a single exhaust gas turbocharger can be achieved. At low speed while the exhaust gas flow is fed to a single turbine runner. At higher speeds, however, both turbine wheels are fed with the exhaust gas flow.
  • the AT 505.407 A4 discloses an exhaust gas turbocharger for an internal combustion engine, wherein the turbine wheel is designed double-flow. About a gate valve can be switched between one and two floods.
  • an exhaust gas turbocharger with an exhaust gas turbine and a compressor is known, which is associated with a larger and a smaller turbine flood, wherein the larger turbine flow adjacent to the shaft and the smaller turbine trough the shaft is turned away.
  • the exhaust gas of all cylinders can optionally be supplied as a function of the rotational speed of either the small or the large turbine tide.
  • the object of the invention is to avoid these disadvantages and to avoid a delayed response in an internal combustion engine when accelerating after a coasting operation.
  • the first turbine runner is designed for larger flow volumes than the second turbine runner, wherein the first turbine runner can be flowed through during at least one acceleration phase and the second turbine runner during at least one overrun phase of the internal combustion engine.
  • the exhaust gas flow is switched in overrun operation of the internal combustion engine to the second turbine impeller to keep the running gear of the turbocharger to speed.
  • the internal combustion engine acts as an air pump.
  • an increased boost pressure can be made available immediately when stopping the overrun operation and when accelerating the vehicle.
  • FIGS. show schematically:
  • FIG. 1 shows an internal combustion engine according to the invention during an acceleration phase.
  • FIGS. Show an internal combustion engine 1 with a plurality of cylinders 2.
  • a primary exhaust gas turbine 4 of an exhaust gas turbocharger 5 is arranged, the compressor of which is indicated by reference numeral 6.
  • a second turbine impeller 7a of an auxiliary turbine 7 is provided on the same shaft 9 as the first turbine impeller 4a of the primary exhaust gas turbine 4, a second turbine impeller 7a of an auxiliary turbine 7 is provided.
  • the first turbine impeller 4a of the exhaust gas turbine 4 is designed for larger volume flows than the second turbine impeller 7a of the auxiliary turbine 7.
  • the flow cross sections in the inlet or outlet to the primary exhaust gas turbine 4 are dimensioned larger than in the auxiliary turbine 7.
  • About a Weg 8 optionally the exhaust gas flow to the first turbine impeller 4a of the exhaust gas turbine 4 or to the second turbine impeller 7a of the auxiliary turbine 7 are passed.

Abstract

The invention relates to an internal combustion engine (1) for a vehicle, in particular for a racing vehicle, comprising at least one exhaust gas tract (3) in which at least one exhaust gas turbine (4) of an exhaust gas turbocharger (5) is arranged, wherein at least two turbine impellers (4a, 7a) are arranged on a common shaft (9), wherein a separate exhaust gas flow path leads to each turbine impeller (4a, 9a), comprising a switching element (8) for switching between the two exhaust gas flow paths. In order to enable acceleration from a coasting operation without delay, according to the invention the first turbine impeller (4a) is designed for larger flow volumes than the second turbine impeller (7a), wherein flow through the first turbine impeller (4a) is possible during at least one acceleration phase and flow through the second turbine impeller (7a) is possible during at least one coasting phase of the internal combustion engine (1).

Description

Brennkraftmaschine  Internal combustion engine
Die Erfindung betrifft eine Brennkraftmaschine, für ein Fahrzeug, insbesondere für ein Rennfahrzeug, mit zumindest einem Abgasstrang in welchem mindestens eine Abgasturbine eines Abgasturboladers angeordnet ist, wobei zumindest zwei Turbinenlaufräder auf einer gemeinsamen Welle angeordnet sind, wobei zu jedem Turbinenlaufrad ein separater Abgasströmungswegs führt, mit einem Schaltventil zum Umschalten zwischen den beiden Abgasströmungswegen. Weiters betrifft die Erfindung ein Verfahren zum Betreiben dieser Brennkraftmaschine. The invention relates to an internal combustion engine, for a vehicle, in particular for a racing vehicle, with at least one exhaust gas line in which at least one exhaust gas turbine of an exhaust gas turbocharger is arranged, wherein at least two turbine runners are arranged on a common shaft, wherein a separate exhaust gas flow path leads to each turbine run, with a switching valve for switching between the two exhaust gas flow paths. Furthermore, the invention relates to a method for operating this internal combustion engine.
Die US 4,339,922 A offenbart einen Abgasturbolader mit zwei Turbinenlaufrädern, wobei zu jedem Laufrad ein getrennter Strömungsweg führt. Jede Turbine weist eine eigene Einlaufspirale auf. Stromaufwärts der Abgasturbine ist ein Steuerventil angeordnet, mit welchem wahlweise die Abgasströmung einem einzelnen Turbinenlaufrad oder beiden Turbinenlaufrädern zugeführt werden kann. Dadurch können die Vorteile einer kleindimensionierten Turbine und einer großdimensionierten Turbine mit einem einzigen Abgasturbolader erreicht werden. Bei niedriger Drehzahl wird dabei die Abgasströmung nur einem einzigen Turbinenlaufrad zugeführt. Bei höherer Drehzahl dagegen werden beide Turbinenlaufräder mit dem Abgasstrom gespeist. US 4,339,922 A discloses an exhaust gas turbocharger with two turbine wheels, wherein a separate flow path leads to each wheel. Each turbine has its own inlet spiral. Upstream of the exhaust gas turbine, a control valve is arranged, with which either the exhaust gas flow can be fed to a single turbine runner or both turbine runners. This allows the advantages of a small-sized turbine and a large-sized turbine with a single exhaust gas turbocharger can be achieved. At low speed while the exhaust gas flow is fed to a single turbine runner. At higher speeds, however, both turbine wheels are fed with the exhaust gas flow.
Die AT 505.407 A4 offenbart einen Abgasturbolader für eine Brennkraftmaschine, wobei das Turbinenlaufrad doppelflutig ausgeführt ist. Über einen Sperrschieber kann zwischen einer und beiden Fluten umgeschaltet werden. The AT 505.407 A4 discloses an exhaust gas turbocharger for an internal combustion engine, wherein the turbine wheel is designed double-flow. About a gate valve can be switched between one and two floods.
Weiters ist aus der DE 10 2006 019 780 AI ein Abgasturbolader mit einer Abgasturbine und einem Verdichter bekannt, dem eine größere und eine kleinere Turbinenflut zugeordnet ist, wobei die größere Turbinenflut benachbart zur Welle angeordnet und die kleinere Turbinenflut der Welle abgewandt ist. Über eine Schalteinrichtung kann das Abgas sämtlicher Zylinder wahlweise in Abhängigkeit der Drehzahl entweder der kleinen oder der großen Turbinenflut zugeführt werden. Furthermore, from DE 10 2006 019 780 AI an exhaust gas turbocharger with an exhaust gas turbine and a compressor is known, which is associated with a larger and a smaller turbine flood, wherein the larger turbine flow adjacent to the shaft and the smaller turbine trough the shaft is turned away. By means of a switching device, the exhaust gas of all cylinders can optionally be supplied as a function of the rotational speed of either the small or the large turbine tide.
Beim Umschalten einer Brennkraftmaschine vom Motorbetrieb auf Schubbetrieb kommt es zu einer deutlichen Absenkung der Drehzahl des Abgasturboladers und somit zu einer drastischen Verringerung des Ladedruckes. Dies führt bei Beendigung des Schubbetriebes und Beschleunigen der Brennkraftmaschine zu einer deutlichen Verzögerung, da der Abgasturbolader erst wieder auf Betriebsdrehzahl gebracht werden muss. Aufgabe der Erfindung ist es, diese Nachteile zu vermeiden und bei einer Brennkraftmaschine ein verzögertes Ansprechen beim Beschleunigen nach einem Schubbetrieb zu vermeiden. When switching an internal combustion engine from engine operation to overrun, there is a significant reduction in the speed of the exhaust gas turbocharger and thus to a drastic reduction in boost pressure. This leads to a significant delay at the end of the overrun operation and acceleration of the internal combustion engine, since the exhaust gas turbocharger must first be brought back to operating speed. The object of the invention is to avoid these disadvantages and to avoid a delayed response in an internal combustion engine when accelerating after a coasting operation.
Erfindungsgemäß wird dies dadurch erreicht, dass das erste Turbinenlaufrad für größere Durchflussmengen, als das zweite Turbinenlaufrad ausgelegt ist, wobei das erste Turbinenlaufrad während zumindest einer Beschleunigungsphase und das zweite Turbinenlaufrad während zumindest einer Schubphase der Brennkraftmaschine durchströmbar ist. Somit wird der Abgasstrom im Schubbetrieb des Brennkraftmaschine auf das zweite Turbinenlaufrad umgeschaltet, um das Laufzeug des Turboladers auf Drehzahl zu halten. Während des Schubbetriebes fungiert die Brennkraftmaschine dabei als Luftpumpe. Dadurch kann bei Beenden des Schubbetriebes und beim Beschleunigen des Fahrzeuges sofort ein erhöhter Ladedruck zur Verfügung gestellt werden. According to the invention, this is achieved in that the first turbine runner is designed for larger flow volumes than the second turbine runner, wherein the first turbine runner can be flowed through during at least one acceleration phase and the second turbine runner during at least one overrun phase of the internal combustion engine. Thus, the exhaust gas flow is switched in overrun operation of the internal combustion engine to the second turbine impeller to keep the running gear of the turbocharger to speed. During the overrun operation, the internal combustion engine acts as an air pump. As a result, an increased boost pressure can be made available immediately when stopping the overrun operation and when accelerating the vehicle.
Die Erfindung wird im Folgenden anhand der Figuren näher erläutert. Es zeigen schematisch : The invention will be explained in more detail below with reference to FIGS. They show schematically:
Fig. 1 eine erfindungsgemäße Brennkraftmaschine während einer Beschleunigungsphase; und 1 shows an internal combustion engine according to the invention during an acceleration phase. and
Fig. 2 die Brennkraftmaschine während einer Schubphase. 2 shows the internal combustion engine during a coasting phase.
Die Fig. zeigen eine Brennkraftmaschine 1 mit mehreren Zylindern 2. Im Abgasstrang 3 der Brennkraftmaschine ist eine primäre Abgasturbine 4 eines Abgasturboladers 5 angeordnet, dessen Verdichter mit Bezugszeichen 6 angedeutet ist. Auf der gleichen Welle 9 wie das erste Turbinenlaufrad 4a der primären Abgasturbine 4 ist ein zweites Turbinenlaufrad 7a einer Hilfsturbine 7 vorgesehen. Das erste Turbinenlaufrad 4a der Abgasturbine 4 ist für größere Volumenströme ausgelegt, als das zweite Turbinenlaufrad 7a der Hilfsturbine 7. Auch die Strömungsquerschnitte im Zulauf oder Ablauf zur primären Abgasturbine 4 sind größer dimensioniert als bei der Hilfsturbine 7. Über ein Schaltorgang 8 kann wahlweise der Abgasstrom zum ersten Turbinenlaufrad 4a der Abgasturbine 4 oder zum zweiten Turbinenlaufrad 7a der Hilfsturbine 7 geleitet werden. The FIGS. Show an internal combustion engine 1 with a plurality of cylinders 2. In the exhaust line 3 of the internal combustion engine, a primary exhaust gas turbine 4 of an exhaust gas turbocharger 5 is arranged, the compressor of which is indicated by reference numeral 6. On the same shaft 9 as the first turbine impeller 4a of the primary exhaust gas turbine 4, a second turbine impeller 7a of an auxiliary turbine 7 is provided. The first turbine impeller 4a of the exhaust gas turbine 4 is designed for larger volume flows than the second turbine impeller 7a of the auxiliary turbine 7. The flow cross sections in the inlet or outlet to the primary exhaust gas turbine 4 are dimensioned larger than in the auxiliary turbine 7. About a Schaltorgang 8 optionally the exhaust gas flow to the first turbine impeller 4a of the exhaust gas turbine 4 or to the second turbine impeller 7a of the auxiliary turbine 7 are passed.
Während des normalen Motorbetriebes, insbesondere während Beschleunigungsphasen, wird der gesamte Abgasstrom durch das erste Turbinenlaufrad 4a der Abgasturbine 4 des Abgasturboladers 5 geleitet, wie in Fig. 1 dargestellt ist. In Schubphasen der Brennkraftmaschine 1 dagegen wird der Abgasstrom durch Umschalten des Schaltorganes 8 zum zweiten Turbinenlaufrad 7a der Hilfsturbine 7 geleitet, wodurch das Laufzeug des Abgasturboladers 5 auf Drehzahl gehalten wird, bis der Schubbetrieb beendet wird. Bei Einsetzen des Motorbetriebes steht der Brennkraftmaschine 1 sofort wieder ausreichend Ladedruck zur Verfügung, wodurch der Beschleunigungsvorgang ohne merkbare Verzögerung erfolgen kann. During normal engine operation, in particular during acceleration phases, the entire exhaust gas flow is conducted through the first turbine impeller 4 a of the exhaust gas turbine 4 of the exhaust gas turbocharger 5, as shown in FIG. 1. In overrun phases of the internal combustion engine 1, however, the exhaust stream is passed by switching the switching element 8 to the second turbine impeller 7a of the auxiliary turbine 7, whereby the running gear of the exhaust gas turbocharger 5 is kept at speed until the overrun operation is terminated. At the onset of engine operation of the internal combustion engine 1 immediately sufficient back pressure available, whereby the acceleration process can be done without noticeable delay.

Claims

P A T E N T A N S P R Ü C H E PATENT APPLICATIONS
1. Brennkraftmaschine (1), für ein Fahrzeug, insbesondere für ein Rennfahrzeug, mit zumindest einem Abgasstrang (3) in welchem mindestens eine Abgasturbine (4) eines Abgasturboladers (5) angeordnet ist, wobei zumindest zwei Turbinenlaufräder (4a, 7a) auf einer gemeinsamen Welle (9) angeordnet sind, wobei zu jedem Turbinenlaufrad (4a, 9a) ein separater Abgasströmungswegs führt, mit einem Schaltorgan (8) zum Umschalten zwischen den beiden Abgasströmungswegen, dadurch gekennzeichnet, dass das erste Turbinenlaufrad (4a) für größere Durchflussmengen, als das zweite Turbinenlaufrad (7a) ausgelegt ist, wobei das erste Turbinenlaufrad (4a) während zumindest einer Beschleunigungsphase und das zweite Turbinenlaufrad (7a) während zumindest einer Schubphase der Brennkraftmaschine (1) durchströmbar ist. 1. internal combustion engine (1), for a vehicle, in particular for a racing vehicle, with at least one exhaust line (3) in which at least one exhaust gas turbine (4) of an exhaust gas turbocharger (5) is arranged, wherein at least two turbine wheels (4a, 7a) on a common shaft (9) are arranged, with each turbine runner (4a, 9a) leads a separate exhaust gas flow path, with a switching member (8) for switching between the two exhaust gas flow paths, characterized in that the first turbine runner (4a) for larger flow rates, than the second turbine runner (7a) is designed, wherein the first turbine runner (4a) during at least one acceleration phase and the second turbine runner (7a) during at least one overrun phase of the internal combustion engine (1) can be flowed through.
2. Brennkraftmaschine (1) nach Anspruch 1, dadurch gekennzeichnet, dass das erste Turbinenlaufrad (4a) und das zweite Turbinenlaufrad (7a) in separaten Turbinengehäusen angeordnet sind. Second internal combustion engine (1) according to claim 1, characterized in that the first turbine runner (4a) and the second turbine runner (7a) are arranged in separate turbine housings.
3. Brennkraftmaschine (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das erste Turbinenlaufrad (4a) und das zweite Turbinenlaufrad (7a) im selben Turbinengehäuse angeordnet sind. Third internal combustion engine (1) according to claim 1 or 2, characterized in that the first turbine runner (4a) and the second turbine runner (7a) are arranged in the same turbine housing.
4. Verfahren zum Betreiben einer Brennkraftmaschine (1), für ein Fahrzeug, insbesondere für ein Rennfahrzeug, mit zumindest einem Abgasstrang (3) in welchem mindestens eine Abgasturbine (4) eines Abgasturboladers (5) angeordnet ist, wobei zumindest zwei Turbinenlaufräder (4a, 7a) auf einer gemeinsamen Welle (9) angeordnet sind, wobei zu jedem Turbinenlaufrad (4a, 7a) ein separater Abgasströmungswegs führt, mit einem Schaltorgan (8) zum Umschalten zwischen den beiden Abgasströmungswegen, dadurch gekennzeichnet, dass das erste Turbinenlaufrad (4a) für größere Durchflussmengen, als das zweite Turbinenlaufrad (7a) ausgelegt wird, und dass das erste Turbinenlaufrad (4a) während zumindest einer Beschleunigungsphase und das zweite Turbinenlaufrad (7a) während zumindest einer Schubphase der Brennkraftmaschine (1) durchströmt wird. 4. A method for operating an internal combustion engine (1), for a vehicle, in particular for a racing vehicle, with at least one exhaust line (3) in which at least one exhaust gas turbine (4) of an exhaust gas turbocharger (5) is arranged, wherein at least two turbine wheels (4a, 7a) are arranged on a common shaft (9), wherein a separate exhaust gas flow path leads to each turbine runner (4a, 7a), with a switching member (8) for switching between the two exhaust gas flow paths, characterized in that the first turbine runner (4a) for greater flow rates than the second turbine runner (7a) is designed, and that the first turbine runner (4a) during at least one acceleration phase and the second turbine runner (7a) during at least one overrun phase of the internal combustion engine (1) is flowed through.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das zweite Turbinenlaufrad (7a) während der Schubphase von durch die Brennkraftmaschine (1) komprimierter Luft durchströmt wird. 5. The method according to claim 4, characterized in that the second turbine impeller (7a) is flowed through by the internal combustion engine (1) compressed air during the overrun phase.
2011 12 12 2011 12 12
Fu/St Fu / St
PCT/EP2011/072421 2010-12-20 2011-12-12 Internal combustion engine WO2012084567A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA2098/2010A AT510599B1 (en) 2010-12-20 2010-12-20 Internal combustion engine
ATA2098/2010 2010-12-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019239010A1 (en) * 2018-06-12 2019-12-19 Finger Motors Oy Turbocharger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339922A (en) 1979-07-09 1982-07-20 Navarro Bernard J Dual turbine turbo-supercharger
US5163294A (en) * 1990-05-17 1992-11-17 Aisin Seiki Kabushiki Kaisha Turbocharger with coupling between compressor rotors
DE102006019780A1 (en) 2006-04-28 2007-11-08 Daimlerchrysler Ag Exhaust gas turbocharger in an internal combustion engine
AT505407A4 (en) 2007-08-16 2009-01-15 Ghm Engineering EXHAUST BOLDER FOR AN INTERNAL COMBUSTION ENGINE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009138719A (en) * 2007-12-11 2009-06-25 Hino Motors Ltd Multi-turbo system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339922A (en) 1979-07-09 1982-07-20 Navarro Bernard J Dual turbine turbo-supercharger
US5163294A (en) * 1990-05-17 1992-11-17 Aisin Seiki Kabushiki Kaisha Turbocharger with coupling between compressor rotors
DE102006019780A1 (en) 2006-04-28 2007-11-08 Daimlerchrysler Ag Exhaust gas turbocharger in an internal combustion engine
AT505407A4 (en) 2007-08-16 2009-01-15 Ghm Engineering EXHAUST BOLDER FOR AN INTERNAL COMBUSTION ENGINE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019239010A1 (en) * 2018-06-12 2019-12-19 Finger Motors Oy Turbocharger

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AT510599A4 (en) 2012-05-15

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