WO2017036972A1 - Exhaust gas turbocharger for an internal combustion engine - Google Patents

Exhaust gas turbocharger for an internal combustion engine Download PDF

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Publication number
WO2017036972A1
WO2017036972A1 PCT/EP2016/070215 EP2016070215W WO2017036972A1 WO 2017036972 A1 WO2017036972 A1 WO 2017036972A1 EP 2016070215 W EP2016070215 W EP 2016070215W WO 2017036972 A1 WO2017036972 A1 WO 2017036972A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
valve element
combustion engine
internal combustion
gas turbocharger
Prior art date
Application number
PCT/EP2016/070215
Other languages
German (de)
French (fr)
Inventor
Matthias Emanuel
Jürgen Ganzhorn
Dirk Lummer
Gunter Winkler
Jens Linn
Nils Brinkert
Michael Rott
Original Assignee
Bosch Mahle Turbo Systems Gmbh & Co. Kg
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 Bosch Mahle Turbo Systems Gmbh & Co. Kg filed Critical Bosch Mahle Turbo Systems Gmbh & Co. Kg
Priority to DE112016003997.2T priority Critical patent/DE112016003997A5/en
Priority to GB1802420.8A priority patent/GB2557491B/en
Publication of WO2017036972A1 publication Critical patent/WO2017036972A1/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
    • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
    • F02B37/025—Multiple scrolls or multiple gas passages guiding the gas to the pump drive
    • 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
    • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/105—Final actuators by passing part of the fluid
    • 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
    • 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
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • 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
    • F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
    • 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
    • F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
    • F02B37/225—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits air passages
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2014—Shaping of the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • 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 exhaust gas turbocharger for an internal combustion engine and an internal combustion engine with an exhaust gas turbocharger.
  • Valve element which is intended to at least largely separate the exhaust gas flows in a closed position from each other in terms of flow and in an open position to connect the exhaust gas flow with each other, known, wherein the valve element is made massive.
  • the invention is in particular the object of a wear of the
  • the invention relates to an exhaust gas turbocharger for an internal combustion engine, with a first exhaust gas flow and with a second exhaust gas flow, which are intended to lead the exhaust gases of different cylinders, and with a valve element which is provided, in a closed position, the exhaust gas flows fluidly
  • valve element is at least partially hollow. As a result, a weight reduction for the valve element can be achieved.
  • a weight reduction of at least forty percent, advantageously at least fifty percent, compared to a solid material embodiment can be achieved. Wear of the valve element in an operation can thus be reduced. Furthermore, a reduction of required actuating forces can be achieved.
  • the valve element is provided to at least largely separate the exhaust gas flow in a closed position from each other.
  • the valve element in the closed position closes a connection area between the floods at least ninety percent and preferably at least ninety-five percent.
  • the exhaust gas turbocharger comprises a bypass channel, which is provided for the direct discharge of the exhaust gas and which is fluidically connected in the open position of the valve element with the exhaust gas.
  • a charge pressure of the internal combustion engine can be limited by opening the bypass channel simultaneously with a connection of the exhaust gas flows.
  • a further valve unit which opens and closes the bypass channel and which is formed separately from the valve unit which opens and closes the connection channel, can be dispensed with. It can be achieved by a space-saving and simply designed exhaust gas turbocharger.
  • the exhaust gas turbocharger comprises at least one wall which delimits at least one of the floods and which forms at least one gap with the valve element.
  • the invention relates to an internal combustion engine having an exhaust gas turbocharger, which comprises a first exhaust gas flow and a second exhaust gas flow, which are intended to guide the exhaust gases of different cylinders, and a valve element, which is provided, in a closed position, the exhaust gas flows fluidly
  • valve element is at least partially hollow. As a result, a weight reduction for the valve element can be achieved.
  • the single FIGURE shows a section of an internal combustion engine 10 with a
  • Exhaust gas turbocharger 1 with a first exhaust gas flow 12 and with a second exhaust gas flow 13, which are intended to guide the exhaust gases of different cylinders.
  • the exhaust gases are used by the exhaust gas turbocharger 1 1 to drive a turbine that drives a compressor of the internal combustion engine 10.
  • the exhaust gas turbocharger 1 1 comprises a first
  • Wall 14 a second wall 15, a third wall 16 and a fourth
  • the first wall 14 is arranged between the exhaust gas flows 12, 13.
  • the first exhaust gas flow 12 is limited by the first wall 14, the second wall 15 and the fourth wall 17 of the exhaust gas turbocharger 1 1, the second exhaust gas flow 13 through the first wall 14, the third wall 16 and the fourth wall 17.
  • the exhaust gas turbocharger 1 1st also has one
  • the connecting channel 18 is bounded by the first wall 14 and the fourth wall 17.
  • the exhaust gas turbocharger 1 1 comprises a valve element 20 which is provided to largely separate the exhaust gas flows 12, 13 in a closed position from one another and to connect the exhaust gas flows 12, 13 in terms of flow in an open position.
  • the valve element 20 closes the connecting channel 18 between the first exhaust gas flow 12 and the second exhaust gas flow 13 to at least 95 percent.
  • a gas flow between the exhaust gas flows 12, 13 is limited in the closed position to one percent of a gas flow in a maximum open position.
  • the fourth wall 17 has an opening in which the valve element 20 is inserted and which is completely closed by the valve element 20 in the closed position.
  • the exhaust gas turbocharger 1 1 has a bypass channel 19 which is provided for the direct discharge of the exhaust gas and which is fluidically connected in the open position of the valve element 20 with the exhaust gas flows 12, 13.
  • the exhaust gas is from the
  • Bypass passage 19 led directly to a catalyst and an exhaust.
  • Bypass passage 19 is intended to be opened for boost control, to a capacity of the exhaust gas turbocharger 1 1 and a boost pressure of
  • the bypass channel 19 is of the
  • the exhaust gas turbocharger 1 1 has a pivot arm 23 which can be pivoted about a pivot axis 24.
  • the valve element 20 is arranged on the pivot arm 23, the valve element 20 is arranged. By pivoting the pivot arm 23, the valve element 20 of the
  • Exhaust gas flows around the valve element 20 and is guided in the bypass passage 19 to the catalyst and the exhaust.
  • the valve element 20 is hollow and has a cavity 21 in one
  • the cavity 21 occupies forty percent of a total volume of the valve member 20 that would result if the valve member 20 were solid.
  • the cavity 21 is arranged in a region of the valve element 20, which is received in the closed position in the connecting channel 18.
  • the valve element 20 has a thin edge which defines the cavity 21 and in the
  • the thin edge is mirror symmetric with respect to an axis extending perpendicularly from an outer surface of the first wall 14 through a center of the
  • Valve element 20 extends.
  • the valve member 20 has in the region in which it is received in the closed position in the connecting channel 18, a cross-section with a U-shape with bevelled side walls facing each other on.
  • the thin edge defining the cavity 21 forms the side walls of the U-shape.
  • a wall thickness of the thin rim is small relative to a diameter of the cavity 21 and to a diameter of a smallest envelope volume that encloses the valve element 20. Seen in a 360 ° view, this indicates
  • Valve element 20 in the region in which it is in the closed position in the
  • Connecting channel 18 is received, basically a shape of an inverted cup.
  • the first wall 14 forms with the valve element 20 has two gaps 22, 22 '.
  • the gaps 22, 22 ' allow a compensation of a different thermal
  • the gap 22 faces the first exhaust gas flow 12, the gap 22 'of the second exhaust gas flow 13.
  • the connecting channel 18 is open through the gaps 22, 22 'to a small extent.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Supercharger (AREA)

Abstract

The invention relates to an exhaust gas turbocharger (11) for an internal combustion engine (10) comprising a first exhaust gas duct (12) and a second exhaust gas duct (13) which are provided to guide the exhaust gases to different cylinders, and a valve element (20) which is provided to at least substantially fluidically separate the exhaust gas ducts (12, 13) from one another in a closed position and to fluidically connect the exhaust gas ducts (12, 13) to one another in an open position, wherein the valve element (20) is designed to be at least partially hollow. The invention also relates to an internal combustion engine (10) comprising an exhaust gas turbocharger (11) having a first exhaust gas duct (12) and a second exhaust gas duct (13) which are provided to guide the exhaust gases to different cylinders, and having a valve element (20) which is provided to at least substantially fluidically separate the exhaust gas ducts (12, 13) from one another in a closed position and to fluidically connect the exhaust gas ducts (12, 13) to one another in an open position, wherein the valve element (20) is designed to be at least partially hollow.

Description

Abgasturbolader für eine Brennkraftmaschine  Exhaust gas turbocharger for an internal combustion engine
Die Erfindung betrifft einen Abgasturbolader für eine Brennkraftmaschine und eine Brennkraftmaschine mit einem Abgasturbolader. The invention relates to an exhaust gas turbocharger for an internal combustion engine and an internal combustion engine with an exhaust gas turbocharger.
Aus der DE 10 2013 002 894 A1 ist bereits ein Abgasturbolader für eine From DE 10 2013 002 894 A1 is already an exhaust gas turbocharger for a
Brennkraftmaschine, mit einer ersten Abgasflut und mit einer zweiten Abgasflut, die dazu vorgesehen sind, die Abgase unterschiedlicher Zylinder zu führen, und mit einem Internal combustion engine, with a first exhaust gas flow and with a second exhaust gas flow, which are intended to lead the exhaust gases of different cylinders, and with a
Ventilelement, das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten strömungstechnisch voneinander zumindest weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten strömungstechnisch miteinander zu verbinden, bekannt, wobei das Ventilelement massiv ausgeführt ist. Valve element, which is intended to at least largely separate the exhaust gas flows in a closed position from each other in terms of flow and in an open position to connect the exhaust gas flow with each other, known, wherein the valve element is made massive.
Der Erfindung liegt insbesondere die Aufgabe zugrunde, einen Verschleiß des The invention is in particular the object of a wear of the
Ventilelements zu verringern. Sie wird durch eine erfindungsgemäße Ausgestaltung entsprechend dem Anspruch 1 gelöst. Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen. To reduce valve element. It is achieved by an embodiment according to the invention according to claim 1. Further developments of the invention will become apparent from the dependent claims.
Die Erfindung geht aus von einem Abgasturbolader für eine Brennkraftmaschine, mit einer ersten Abgasflut und mit einer zweiten Abgasflut, die dazu vorgesehen sind, die Abgase unterschiedlicher Zylinder zu führen, und mit einem Ventilelement, das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten strömungstechnisch The invention relates to an exhaust gas turbocharger for an internal combustion engine, with a first exhaust gas flow and with a second exhaust gas flow, which are intended to lead the exhaust gases of different cylinders, and with a valve element which is provided, in a closed position, the exhaust gas flows fluidly
voneinander zumindest weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten strömungstechnisch miteinander zu verbinden. at least largely separate from each other and to connect the exhaust gas flows in an open position fluidly with each other.
Es wird vorgeschlagen, dass das Ventilelement zumindest teilweise hohl ausgeführt ist. Dadurch kann eine Gewichtsreduzierung für das Ventilelement erreicht werden. It is proposed that the valve element is at least partially hollow. As a result, a weight reduction for the valve element can be achieved.
Insbesondere kann eine Gewichtsreduzierung von zumindest vierzig Prozent, vorteilhaft von zumindest fünfzig Prozent gegenüber einer Vollmaterialausführung erzielt werden. Ein Verschleiß des Ventilelements in einem Betrieb kann somit verringert werden. Ferner kann eine Verringerung von benötigten Betätigungskräften erzielt werden. Darunter, dass„das Ventilelement dazu vorgesehen ist, in einer Schließstellung die Abgasfluten strömungstechnisch voneinander zumindest weitgehend zu trennen", soll in diesem Zusammenhang verstanden werden, dass das Ventilelement in der Schließstellung einen Verbindungsbereich zwischen den Fluten zu zumindest neunzig Prozent und bevorzugt zu zumindest fünfundneunzig Prozent verschließt. Darunter, dass das „Ventilelement zumindest teilweise hohl ausgeführt ist", soll in diesem Zusammenhang verstanden werden, dass das Ventilelement innerhalb eines kleinsten Hüllvolumens, das das Ventilelement einschließt, einen Hohlraum aufweist, der zumindest vierzig Prozent eines Volumens innerhalb des kleinsten Hüllvolumens ausmacht. In particular, a weight reduction of at least forty percent, advantageously at least fifty percent, compared to a solid material embodiment can be achieved. Wear of the valve element in an operation can thus be reduced. Furthermore, a reduction of required actuating forces can be achieved. Including that "the valve element is provided to at least largely separate the exhaust gas flow in a closed position from each other," should in this Be understood that the valve element in the closed position closes a connection area between the floods at least ninety percent and preferably at least ninety-five percent. By "making the valve member at least partially hollow", it should be understood in this context that within a smallest envelope volume including the valve member, the valve member has a cavity that is at least forty percent of a volume within the smallest envelope volume.
Ferner wird vorgeschlagen, dass der Abgasturbolader einen Bypasskanal umfasst, der zur direkten Abführung des Abgases vorgesehen ist und der in der Öffnungsstellung des Ventilelements mit den Abgasfluten strömungstechnisch verbunden ist. Dadurch kann gleichzeitig mit einer Verbindung der Abgasfluten untereinander ein Ladedruck der Brennkraftmaschine durch Öffnung des Bypasskanals begrenzt werden. Somit kann auf eine weitere Ventileinheit, die den Bypasskanal öffnet und schließt und die separat von der Ventileinheit, die den Verbindungskanal öffnet und schließt, ausgebildet ist, verzichtet werden. Es kann dadurch ein bauraumsparender und einfach konstruierter Abgasturbolader erreicht werden. It is also proposed that the exhaust gas turbocharger comprises a bypass channel, which is provided for the direct discharge of the exhaust gas and which is fluidically connected in the open position of the valve element with the exhaust gas. As a result, a charge pressure of the internal combustion engine can be limited by opening the bypass channel simultaneously with a connection of the exhaust gas flows. Thus, a further valve unit, which opens and closes the bypass channel and which is formed separately from the valve unit which opens and closes the connection channel, can be dispensed with. It can be achieved by a space-saving and simply designed exhaust gas turbocharger.
Des Weiteren umfasst der Abgasturbolader zumindest eine Wandung, die zumindest eine der Fluten begrenzt und die mit dem Ventilelement zumindest einen Spalt ausbildet. Dadurch kann eine unterschiedliche thermische Ausdehnung der Wandung und des Ventilelements ausgeglichen werden. Furthermore, the exhaust gas turbocharger comprises at least one wall which delimits at least one of the floods and which forms at least one gap with the valve element. As a result, a different thermal expansion of the wall and the valve element can be compensated.
Des Weiteren betrifft die Erfindung eine Brennkraftmaschine mit einem Abgasturbolader, der eine erste Abgasflut und eine zweite Abgasflut, die dazu vorgesehen sind, die Abgase unterschiedlicher Zylinder zu führen, und ein Ventilelement umfasst, das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten strömungstechnisch Furthermore, the invention relates to an internal combustion engine having an exhaust gas turbocharger, which comprises a first exhaust gas flow and a second exhaust gas flow, which are intended to guide the exhaust gases of different cylinders, and a valve element, which is provided, in a closed position, the exhaust gas flows fluidly
voneinander zumindest weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten strömungstechnisch miteinander zu verbinden. at least largely separate from each other and to connect the exhaust gas flows in an open position fluidly with each other.
Es wird vorgeschlagen, dass das Ventilelement zumindest teilweise hohl ausgeführt ist. Dadurch kann eine Gewichtsreduzierung für das Ventilelement erreicht werden. It is proposed that the valve element is at least partially hollow. As a result, a weight reduction for the valve element can be achieved.
Insbesondere kann eine Gewichtsreduzierung von zumindest vierzig Prozent, vorteilhaft von zumindest fünfzig Prozent gegenüber einer Vollmaterialausführung erzielt werden. Ein Verschleiß des Ventilelements in einem Betrieb kann somit verringert werden. Ferner kann eine Verringerung von benötigten Betätigungskräften erzielt werden. Weitere Vorteile ergeben sich aus der folgenden Figurenbeschreibung. In der einzigen Figur ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Figur, die In particular, a weight reduction of at least forty percent, advantageously at least fifty percent, compared to a solid material embodiment can be achieved. Wear of the valve element in an operation can thus be reduced. Furthermore, a reduction of required actuating forces can be achieved. Further advantages will become apparent from the following description of the figures. In the single figure, an embodiment of the invention is shown. The figure, the
Figurenbeschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Description of the figures and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Die einzige Figur zeigt einen Ausschnitt einer Brennkraftmaschine 10 mit einem The single FIGURE shows a section of an internal combustion engine 10 with a
Abgasturbolader 1 1 , mit einer ersten Abgasflut 12 und mit einer zweiten Abgasflut 13, die dazu vorgesehen sind, die Abgase unterschiedlicher Zylinder zu führen. Die Abgase werden vom Abgasturbolader 1 1 zum Antrieb einer Turbine genutzt, die einen Verdichter der Brennkraftmaschine 10 antreibt. Der Abgasturbolader 1 1 umfasst eine erste Exhaust gas turbocharger 1 1, with a first exhaust gas flow 12 and with a second exhaust gas flow 13, which are intended to guide the exhaust gases of different cylinders. The exhaust gases are used by the exhaust gas turbocharger 1 1 to drive a turbine that drives a compressor of the internal combustion engine 10. The exhaust gas turbocharger 1 1 comprises a first
Wandung 14, eine zweite Wandung 15, eine dritte Wandung 16 und eine vierte Wall 14, a second wall 15, a third wall 16 and a fourth
Wandung 17, die die Abgasfluten 12, 13 begrenzen. Die erste Wandung 14 ist zwischen den Abgasfluten 12, 13 angeordnet. Die erste Abgasflut 12 ist durch die erste Wandung 14, die zweite Wandung 15 und die vierte Wandung 17 des Abgasturboladers 1 1 begrenzt, die zweite Abgasflut 13 durch die erste Wandung 14, die dritte Wandung 16 und die vierte Wandung 17. Der Abgasturbolader 1 1 weist zudem einen Wall 17, which limit the exhaust gas flows 12, 13. The first wall 14 is arranged between the exhaust gas flows 12, 13. The first exhaust gas flow 12 is limited by the first wall 14, the second wall 15 and the fourth wall 17 of the exhaust gas turbocharger 1 1, the second exhaust gas flow 13 through the first wall 14, the third wall 16 and the fourth wall 17. The exhaust gas turbocharger 1 1st also has one
Verbindungskanal 18 zwischen der ersten Abgasflut 12 und der zweiten Abgasflut 13 auf. Der Verbindungskanal 18 ist durch die erste Wandung 14 und die vierte Wandung 17 begrenzt. Connecting channel 18 between the first exhaust gas flow 12 and the second exhaust gas flow 13. The connecting channel 18 is bounded by the first wall 14 and the fourth wall 17.
Der Abgasturbolader 1 1 umfasst ein Ventilelement 20, das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten 12, 13 strömungstechnisch voneinander weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten 12, 13 strömungstechnisch miteinander zu verbinden. In der Schließstellung verschließt das Ventilelement 20 den Verbindungskanal 18 zwischen der ersten Abgasflut 12 und der zweiten Abgasflut 13 zu zumindest 95 Prozent. Ein Gasstrom zwischen den Abgasfluten 12, 13 wird in der Schließstellung auf ein Prozent eines Gasstroms in einer maximalen Offenstellung begrenzt. Die vierte Wandung 17 weist eine Öffnung auf, in der das Ventilelement 20 eingesetzt ist und die in der Schließstellung von dem Ventilelement 20 vollständig verschlossen wird. The exhaust gas turbocharger 1 1 comprises a valve element 20 which is provided to largely separate the exhaust gas flows 12, 13 in a closed position from one another and to connect the exhaust gas flows 12, 13 in terms of flow in an open position. In the closed position, the valve element 20 closes the connecting channel 18 between the first exhaust gas flow 12 and the second exhaust gas flow 13 to at least 95 percent. A gas flow between the exhaust gas flows 12, 13 is limited in the closed position to one percent of a gas flow in a maximum open position. The fourth wall 17 has an opening in which the valve element 20 is inserted and which is completely closed by the valve element 20 in the closed position.
Der Abgasturbolader 1 1 weist einen Bypasskanal 19 auf, der zur direkten Abführung des Abgases vorgesehen ist und der in der Öffnungsstellung des Ventilelements 20 mit den Abgasfluten 12, 13 strömungstechnisch verbunden ist. Das Abgas wird von dem The exhaust gas turbocharger 1 1 has a bypass channel 19 which is provided for the direct discharge of the exhaust gas and which is fluidically connected in the open position of the valve element 20 with the exhaust gas flows 12, 13. The exhaust gas is from the
Bypasskanal 19 direkt zu einem Katalysator und zu einem Auspuff geführt. Der Bypass passage 19 led directly to a catalyst and an exhaust. Of the
Bypasskanal 19 ist dazu vorgesehen, für eine Ladedruck-Regelung geöffnet zu werden, um eine Förderleistung des Abgasturboladers 1 1 und einen Ladedruck der Bypass passage 19 is intended to be opened for boost control, to a capacity of the exhaust gas turbocharger 1 1 and a boost pressure of
Brennkraftmaschine 10 zu begrenzen. Der Bypasskanal 19 ist von dem Internal combustion engine 10 to limit. The bypass channel 19 is of the
Verbindungskanal 18 durch die vierte Wandung 17 getrennt. Connecting channel 18 separated by the fourth wall 17.
Der Abgasturbolader 1 1 weist einen Schwenkarm 23 auf, der um eine Schwenkachse 24 geschwenkt werden kann. An dem Schwenkarm 23 ist das Ventilelement 20 angeordnet. Durch Schwenkung des Schwenkarms 23 wird das Ventilelement 20 von der The exhaust gas turbocharger 1 1 has a pivot arm 23 which can be pivoted about a pivot axis 24. On the pivot arm 23, the valve element 20 is arranged. By pivoting the pivot arm 23, the valve element 20 of the
Schließstellung in eine Öffnungsstellung bewegt. Dabei wird das Ventilelement 20 aus dem Verbindungskanal 18 tiefer in den Bypasskanal 19 hineinbewegt. In der Closed position moves to an open position. In this case, the valve element 20 is moved from the connecting channel 18 deeper into the bypass channel 19. In the
Öffnungsstellung umströmt Abgas das Ventilelement 20 und wird in dem Bypasskanal 19 zu dem Katalysator und dem Auspuff geleitet. Exhaust gas flows around the valve element 20 and is guided in the bypass passage 19 to the catalyst and the exhaust.
Das Ventilelement 20 ist hohl ausgeführt und weist einen Hohlraum 21 in einem The valve element 20 is hollow and has a cavity 21 in one
Innenbereich auf. Der Hohlraum 21 nimmt vierzig Prozent eines Gesamtvolumens des Ventilelements 20 ein, das sich ergäbe, wenn das Ventilelement 20 massiv ausgeführt wäre. Der Hohlraum 21 ist in einem Bereich des Ventilelements 20 angeordnet, der in der Schließstellung in dem Verbindungskanal 18 aufgenommen ist. Das Ventilelement 20 weist einen dünnen Rand auf, der den Hohlraum 21 begrenzt und der in der Interior area on. The cavity 21 occupies forty percent of a total volume of the valve member 20 that would result if the valve member 20 were solid. The cavity 21 is arranged in a region of the valve element 20, which is received in the closed position in the connecting channel 18. The valve element 20 has a thin edge which defines the cavity 21 and in the
Schließstellung die Abgasfluten 12, 13 strömungstechnisch voneinander weitgehend trennt. Der dünne Rand ist spiegelsymmetrisch bezüglich einer Achse, die sich senkrecht von einer Außenfläche der ersten Wandung 14 durch einen Mittelpunkt des Closed position, the exhaust gas flows 12, 13 largely fluidly separated from each other. The thin edge is mirror symmetric with respect to an axis extending perpendicularly from an outer surface of the first wall 14 through a center of the
Ventilelements 20 erstreckt. Das Ventilelement 20 weist in dem Bereich, in dem es in der Schließstellung in dem Verbindungskanal 18 aufgenommen ist, einen Querschnitt mit einer U-Form mit abgeschrägten Seitenwänden, die einander zugewandt sind, auf. Der dünne Rand, der den Hohlraum 21 begrenzt, bildet die Seitenwände der U-Form aus. Eine Wandstärke des dünnen Rands ist gering gegenüber einem Durchmesser des Hohlraums 21 und gegenüber einem Durchmesser eines kleinsten Hüllvolumens, das das Ventilelement 20 einschließt. In einer Rundumansicht betrachtet, weist das Valve element 20 extends. The valve member 20 has in the region in which it is received in the closed position in the connecting channel 18, a cross-section with a U-shape with bevelled side walls facing each other on. The thin edge defining the cavity 21 forms the side walls of the U-shape. A wall thickness of the thin rim is small relative to a diameter of the cavity 21 and to a diameter of a smallest envelope volume that encloses the valve element 20. Seen in a 360 ° view, this indicates
Ventilelement 20 in dem Bereich, in dem es in der Schließstellung in dem Valve element 20 in the region in which it is in the closed position in the
Verbindungskanal 18 aufgenommen ist, grundsätzlich eine Form einer umgedrehten Tasse auf. Connecting channel 18 is received, basically a shape of an inverted cup.
Die erste Wandung 14 bildet mit dem Ventilelement 20 zwei Spalte 22, 22' aus. Die Spalte 22, 22' erlauben eine Kompensation einer unterschiedlichen thermischen The first wall 14 forms with the valve element 20 has two gaps 22, 22 '. The gaps 22, 22 'allow a compensation of a different thermal
Ausdehnung der ersten Wandung 14 und des Ventilelements 20. Die Spalte 22, 22' erstrecken sich an der Seite der ersten Wandung 14, die dem Verbindungskanal 18 zugewandt ist. Der Spalt 22 ist der ersten Abgasflut 12 zugewandt, der Spalt 22' der zweiten Abgasflut 13. Der Verbindungskanal 18 ist durch die Spalte 22, 22' in einem geringen Maße offen. Die Spalte 22, 22' weisen eine maximale Höhe von 1 mm auf, wenn die erste Wandung 14 und das Ventilelement 20 beide abgekühlt sind. Expansion of the first wall 14 and the valve element 20. The gaps 22, 22 'extend on the side of the first wall 14, which faces the connecting channel 18. The gap 22 faces the first exhaust gas flow 12, the gap 22 'of the second exhaust gas flow 13. The connecting channel 18 is open through the gaps 22, 22 'to a small extent. The gaps 22, 22 'have a maximum height of 1 mm when the first wall 14 and the valve element 20 are both cooled.

Claims

Patentansprüche claims
1 . Abgasturbolader für eine Brennkraftmaschine (10), mit einer ersten Abgasflut (12) und mit einer zweiten Abgasflut (13), die dazu vorgesehen sind, die Abgase unterschiedlicher Zylinder zu führen, und mit einem Ventilelement (20), das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten (12, 13) 1 . An exhaust gas turbocharger for an internal combustion engine (10), having a first exhaust gas flow (12) and a second exhaust gas flow (13), which are designed to lead the exhaust gases of different cylinders, and having a valve element (20) provided therein a closed position the exhaust gas flows (12, 13)
strömungstechnisch voneinander zumindest weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten (12, 13) strömungstechnisch miteinander zu verbinden,  fluidically separated from each other at least largely and in an open position, the exhaust gas flows (12, 13) fluidly connect to each other,
dadurch gekennzeichnet, dass  characterized in that
das Ventilelement (20) zumindest teilweise hohl ausgeführt ist.  the valve element (20) is at least partially hollow.
2. Abgasturbolader nach Anspruch 1 , 2. Exhaust gas turbocharger according to claim 1,
gekennzeichnet durch  marked by
einen Bypasskanal (19), der zur direkten Abführung des Abgases vorgesehen ist und der in der Öffnungsstellung des Ventilelements (20) mit den Abgasfluten (12, 13) strömungstechnisch verbunden ist.  a bypass channel (19) which is provided for the direct discharge of the exhaust gas and in the open position of the valve element (20) with the exhaust gas flows (12, 13) is fluidly connected.
3. Abgasturbolader nach Anspruch 1 oder 2, 3. Exhaust gas turbocharger according to claim 1 or 2,
gekennzeichnet durch  marked by
zumindest eine Wandung (14), die zumindest eine der Abgasfluten (12, 13) begrenzt und die mit dem Ventilelement (20) zumindest einen Spalt (22, 22') ausbildet. at least one wall (14) delimiting at least one of the exhaust gas flows (12, 13) and forming with the valve element (20) at least one gap (22, 22 ').
4. Brennkraftmaschine mit einem Abgasturbolader (1 1 ), der eine erste Abgasflut (12) und eine zweite Abgasflut (13), die dazu vorgesehen sind, die Abgase 4. Internal combustion engine with an exhaust gas turbocharger (1 1) having a first exhaust gas flow (12) and a second exhaust gas flow (13), which are provided, the exhaust gases
unterschiedlicher Zylinder zu führen, und ein Ventilelement (20) umfasst, das dazu vorgesehen ist, in einer Schließstellung die Abgasfluten (12, 13)  different cylinder, and a valve element (20), which is provided, in a closed position, the exhaust gas flows (12, 13)
strömungstechnisch voneinander zumindest weitgehend zu trennen und in einer Öffnungsstellung die Abgasfluten (12, 13) strömungstechnisch miteinander zu verbinden,  fluidically separated from each other at least largely and in an open position, the exhaust gas flows (12, 13) fluidly connect to each other,
dadurch gekennzeichnet, dass  characterized in that
das Ventilelement (20) zumindest teilweise hohl ausgeführt ist.  the valve element (20) is at least partially hollow.
PCT/EP2016/070215 2015-09-02 2016-08-26 Exhaust gas turbocharger for an internal combustion engine WO2017036972A1 (en)

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DE112016003997.2T DE112016003997A5 (en) 2015-09-02 2016-08-26 Exhaust gas turbocharger for an internal combustion engine
GB1802420.8A GB2557491B (en) 2015-09-02 2016-08-26 Exhaust gas turbocharger for an internal combustion engine

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US20190093549A1 (en) * 2017-09-22 2019-03-28 Toyota Jidosha Kabushiki Kaisha Turbocharger

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Publication number Priority date Publication date Assignee Title
DE102018000185A1 (en) * 2018-01-12 2019-07-18 Daimler Ag Turbine for an exhaust gas turbocharger of an internal combustion engine, in particular for a motor vehicle
DE102020134770A1 (en) 2020-12-22 2022-06-23 Borgwarner Inc. VALVE ASSEMBLY FOR MULTIPLE ENTRY TURBINE

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DE102004034070A1 (en) * 2004-07-15 2006-02-09 Daimlerchrysler Ag Internal combustion engine with an exhaust gas turbocharger
EP1988265A1 (en) * 2006-10-20 2008-11-05 Mitsubishi Heavy Industries, Ltd. Structure of exhaust turbo charger with waste gate valve
EP2708717A1 (en) * 2012-09-13 2014-03-19 Honeywell International Inc. Turbine wastegate
DE102013002894A1 (en) 2013-02-20 2014-09-04 Daimler Ag Turbine for exhaust gas turbocharger, has turbine housing with two drives and bypass passage and flow-through opening that release valve element simultaneously, during adjustment of valve element from closed position to open position
DE102014018069A1 (en) * 2014-12-09 2015-07-02 Daimler Ag Turbine for an exhaust gas turbocharger, in particular an internal combustion engine

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
DE102004034070A1 (en) * 2004-07-15 2006-02-09 Daimlerchrysler Ag Internal combustion engine with an exhaust gas turbocharger
EP1988265A1 (en) * 2006-10-20 2008-11-05 Mitsubishi Heavy Industries, Ltd. Structure of exhaust turbo charger with waste gate valve
EP2708717A1 (en) * 2012-09-13 2014-03-19 Honeywell International Inc. Turbine wastegate
DE102013002894A1 (en) 2013-02-20 2014-09-04 Daimler Ag Turbine for exhaust gas turbocharger, has turbine housing with two drives and bypass passage and flow-through opening that release valve element simultaneously, during adjustment of valve element from closed position to open position
DE102014018069A1 (en) * 2014-12-09 2015-07-02 Daimler Ag Turbine for an exhaust gas turbocharger, in particular an internal combustion engine

Cited By (2)

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US20190093549A1 (en) * 2017-09-22 2019-03-28 Toyota Jidosha Kabushiki Kaisha Turbocharger
US10746091B2 (en) * 2017-09-22 2020-08-18 Toyota Jidosha Kabushiki Kaisha Turbocharger that is configured to direct exhaust gas away from a contact surface

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DE102015011544A1 (en) 2017-03-02
GB2557491A (en) 2018-06-20

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