WO2017153025A1 - Élément soupape pour turbine de turbocompresseur à gaz d'échappement - Google Patents

Élément soupape pour turbine de turbocompresseur à gaz d'échappement Download PDF

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Publication number
WO2017153025A1
WO2017153025A1 PCT/EP2017/000089 EP2017000089W WO2017153025A1 WO 2017153025 A1 WO2017153025 A1 WO 2017153025A1 EP 2017000089 W EP2017000089 W EP 2017000089W WO 2017153025 A1 WO2017153025 A1 WO 2017153025A1
Authority
WO
WIPO (PCT)
Prior art keywords
turbine
valve body
exhaust gas
valve element
valve
Prior art date
Application number
PCT/EP2017/000089
Other languages
German (de)
English (en)
Inventor
Viktor Buchmiller
Sunny Junge
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2017153025A1 publication Critical patent/WO2017153025A1/fr

Links

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
    • F02B37/12—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
    • 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
    • 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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K25/00—Details relating to contact between valve members and seats
    • F16K25/02—Arrangements using fluid issuing from valve members or seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/24—Three-dimensional ellipsoidal
    • F05D2250/241—Three-dimensional ellipsoidal spherical
    • 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 a valve element, in particular a wastegate, for a turbine of an exhaust gas turbocharger according to the preamble of patent claim 1.
  • valve elements in particular in the form of so-called waste gates, for turbines of exhaust gas turbochargers are already well known from the general state of the art and in particular from the production of standard vehicles.
  • a valve element has a valve body, by means of which an amount of a bypass channel of the turbine flowing through the exhaust gas is adjustable. As a result, for example, to be provided by the exhaust gas turbocharger boost pressure is adjustable.
  • the turbine When finished, the turbine has a turbine housing with a receiving space in which a turbine wheel is rotatably received about an axis of rotation relative to the turbine housing.
  • the turbocharger is included
  • part of an internal combustion engine in particular a motor vehicle, wherein the turbine, in particular the turbine wheel, can be driven by the exhaust gas of the internal combustion engine.
  • the exhaust gas by means of
  • Turbine housing led to the receiving space and thus to the turbine wheel, so that the exhaust gas can flow to the turbine wheel and thereby drive.
  • the turbine has at least one bypass channel over which the turbine wheel of at least a portion of the exhaust gas to bypass.
  • the bypassing of the turbine wheel is also referred to as blow-off or blow-off, since the exhaust gas flowing through the bypass channel bypasses the turbine wheel and thus does not flow against it and does not drive.
  • the valve element is commonly referred to as wastegate or wastegate valve and is relative to the turbine housing between a closed position and at least one open position movable.
  • the closed position of the bypass channel by means of the valve element, in particular by means of the valve body, for example, fluidly blocked, so that no exhaust gas can flow through the bypass channel.
  • the valve element releases the bypass channel, so that at least part of the exhaust gas can flow through the bypass channel and thus bypass the turbine wheel.
  • Object of the present invention is to develop a valve element of the type mentioned in such a way that the weight of the valve element can be kept very low.
  • Claim 1 specified type such that the weight of the valve element can be kept particularly low, it is inventively provided that the valve body on a first side at least a first
  • Hollow chamber and on one of the first side facing away from the second side has at least one second hollow chamber.
  • the invention is based in particular on the recognition that the valve body of a conventional valve element is usually solid, that is to say as a solid body or wastegate body, and in particular in the form of a plate. This leads to a high weight of the valve body of a conventional valve element.
  • Valve body and thus the valve element as a whole so that, for example, high accelerations and in particular high forces act on the valve element, in particular when the valve element or the valve body is moved.
  • the high weight leads to vibrations and
  • thermomechanical loads can cause cracks.
  • valve element since the valve body has on the sides facing away from each other at least one hollow chamber. At the same time, by means of the valve body of the
  • Valve element according to the invention ensures a sufficient sealing function be so that the bypass channel by means of the valve body, for example, can be fluidly locked safely. Since the valve body in contrast to a solid body can be produced with a particularly low cost of materials, the
  • Valve body are made particularly inexpensive. Furthermore, it is possible to realize an at least almost uniform wall thickness and thus material, so that the material cracking susceptibility and thus the risk that there are cracks in the
  • Valve body comes can be kept very low. Furthermore, excessive vibrations and thus excessive loads on a kinematics for moving the valve element can be avoided, so that a particularly robust operation of the turbine and thus of the exhaust gas turbocharger as a whole can be realized.
  • the respective hollow chambers are cavities which are open, for example, in each case on exactly one side and thus open into the surroundings of the valve body via the respective exactly one side.
  • the respective hollow chamber for example, a
  • Recess which is open on exactly one side and has a recess bounding the recess in a first direction and at least one wall of the valve body delimiting the recess in all other directions extending perpendicular to the first direction.
  • FIG. 1 shows a detail of a schematic sectional view of a turbine of a
  • Exhaust gas turbocharger comprising a valve element for adjusting an amount of exhaust gas flowing through a bypass passage of the turbine, wherein Fig. 1 is used to explain the background of the invention
  • Fig. 2 is a schematic perspective view of an inventive
  • FIG. 3 shows a schematic side view of the valve element according to FIG. 2; FIG. and
  • Fig. 4 is a further schematic perspective view of the valve element according to
  • Fig. 1 shows a detail in a schematic sectional view of a generally designated 10 turbine for an exhaust gas turbocharger of an internal combustion engine, in particular for driving a motor vehicle such as a
  • the exhaust gas turbocharger comprises the turbine 10 and a compressor, not shown in the figures, which in an intake of the
  • Internal combustion engine air via the intake tract, wherein the air is directed by means of the intake tract in at least one combustion chamber, in particular in the form of a cylinder of the internal combustion engine.
  • the cylinder is the air and fuel, in particular liquid fuel supplied, so that forms a fuel-air mixture in the cylinder. This fuel-air mixture is burned, resulting in exhaust gas of the internal combustion engine.
  • the internal combustion engine has an exhaust tract, by means of which the exhaust gas is discharged from the cylinder.
  • the exhaust gas can flow through the exhaust gas, with the turbine 10 being arranged in the exhaust gas tract.
  • the turbine 10 is also traversed by the exhaust gas of the internal combustion engine.
  • the air flowing through the intake tract is compressed by means of the compressor, so that a particularly efficient operation of the internal combustion engine can be realized.
  • the compressor can be driven by the turbine 10, which in turn can be driven by the exhaust gas, so that energy contained in the exhaust gas can be used to compress the air.
  • the turbine 10 comprises a turbine housing 12, which can be seen in detail in FIG. 1, through which the exhaust gas can flow.
  • the turbine housing 12 has two floods 14 and 16, through which exhaust gas can flow, which are at least partially separated from one another fluidically and open into a receiving space of the turbine housing 12.
  • the turbine housing 12 comprises a wall 18, which can be seen in detail in FIG. 1, through which the floods 14 and 16 at least in one Partial region or length range are fluidly separated from each other.
  • a wall 18 which can be seen in detail in FIG. 1, through which the floods 14 and 16 at least in one Partial region or length range are fluidly separated from each other.
  • the turbine wheel is part of a rotor of the exhaust gas turbocharger, wherein the rotor also comprises a shaft and a compressor wheel of the compressor.
  • the compressor comprises a compressor housing in which the compressor wheel is rotatably received.
  • the compressor wheel is about the aforementioned axis of rotation relative to the
  • Rotatable compressor housing The turbine wheel and the compressor wheel are non-rotatably connected to the shaft so that the compressor wheel can be driven by the turbine wheel via the shaft.
  • the turbine 10, in particular the turbine housing 12, furthermore has at least one overflow opening 20 adjoining the wall 18, for example in the flow direction of the exhaust gas, through the turbine housing 12, via which the flows 14 and 16 can be fluidically connected to one another.
  • the turbine housing 12 has a bypass channel, not visible in the figures, through which the turbine wheel can be bypassed, at least by a part of the exhaust gas. This means that
  • Turbine housing 12 for example, has an inflow opening, via which the exhaust passage from the flood 14 and / or 16 can be fed.
  • This bypassing of the turbine wheel is also called
  • the fluidic connection of the floods 14 and 16, in particular via the overflow opening 20, is also referred to as a blowing, Flutenumblasung or flood connection.
  • the turbine 10 further includes a generally designated 22 valve member which is movable relative to the turbine housing 12 and in particular pivotable about a pivot axis.
  • the valve member 22 includes a valve body 24 which is relatively to the turbine housing 12 movable, in particular about the pivot axis
  • valve body 24 is solid, that is formed as a solid body.
  • the valve body 24 is connected to a presently formed as a pin connecting element 28, via which the valve body 24 and the valve element 22 is connected or coupled in total with a kinematics.
  • the valve element 22 is movable relative to the turbine housing 12.
  • the kinematics include a present as
  • Lever element 26 formed actuating element, by means of which the valve element 22 and thus the valve body 24 are movable, in particular pivotable, are.
  • valve element 22 in particular the valve body 24, is between a
  • valve body 24 are a the
  • valve body 24 has a double function, since the exactly one valve body 24 is used both for setting the first quantity and for adjusting the second quantity of the exhaust gas.
  • the number of parts, the weight and the cost of the turbine 10 can be kept particularly low, so that a particularly advantageous and in particular efficient operation of the turbine 10 can be realized.
  • the bypass channel or the inflow opening of the bypass channel is fluidly blocked by means of the valve body 24, so that no exhaust gas can flow through the bypass channel or can flow into the bypass channel. Further, it is provided that in the closed position of the valve body 24 and the valve element 22 and the overflow 20 is fluidly blocked by means of the valve body 24 so that the floods 14 and 16 in the closed position of the valve body 24 and the valve member 22 is not fluidically via the overflow 20 connected to each other. In other words, the floods 14 and 16 in the
  • valve body 24 closed position of the valve body 24 by means of this fluidly separated from each other. In the open position, the valve body 24 gives both the bypass channel
  • Open position of the valve body 24 is set a flood connection.
  • Jam charging operation are operated as exhaust gas from the flood 14 in the flood 16th
  • FIG. 2 to 4 show an embodiment of the valve element 22, wherein the weight of the valve element 22 can be kept particularly low. From a synopsis of Fig. 2 to 4 is particularly well seen that - to keep the weight of the valve element 22 is particularly low - the valve body 24 on a first side 30 at least a first hollow chamber 32 and on one of the first side 30 opposite or from the first side 30 facing away from, second side 34 has two second hollow chambers 36 and 38.
  • the respective hollow chambers 32, 36 and 38 are formed as respective recesses, wherein the respective recess is open on exactly one respective side and thereby open into the environment of the valve body 24.
  • the respective hollow chamber 32, 36 or 38 has a passage opening 40, via which the respective hollow chamber 32, 36
  • the connecting element 28 is arranged on the first side 30 and thus on the side of the hollow chamber 32, wherein the valve body 24 integral with the
  • Connecting element 28 is formed.
  • the respective hollow chamber 32, 36 is formed.
  • valve body 24 has a bottom 42 formed by the valve body 24, through which the respective hollow chamber 32, 36 and 38 in a first
  • the respective hollow chamber 32, 36 or 38 has an integrally formed with the bottom 42 wall 44 of the valve body 24, wherein the respective hollow chamber 32, 36 and 38 in all perpendicular to the first direction extending directions through the wall 44 is limited. Since the respective Hollow chamber 32, 36 and 38 has the respective passage opening 40, the respective hollow chamber 32, 36 and 38 in a first direction opposite and parallel to the first direction extending second direction open and thus opens in the second direction in the vicinity of the valve body 24th ,
  • the respective second hollow chambers 36 and 38 are set back relative to respective surface regions 46 of the valve body 24 adjoining the respective second hollow chambers 36 and 38, so that the respective second hollow chambers 36 and 38 are opposite to the respective ones Form respective recesses of the valve body 24 form respective hollow chambers 36 and 38 subsequent surface regions 46.
  • the valve body 24 on the second side 34 has a web 48 which protrudes from the surface regions 46 and thus projects beyond the surface regions 46.
  • the second hollow chambers 36 and 38 are arranged by the web between the hollow chambers 36 and 38
  • a particularly high strength of the web 48 due to a particularly advantageous connection to the valve body 24 can be realized. Furthermore, excess material can be avoided at a tip S of the valve body 24, but provided as a tongue or trained web 48 is provided for separating the floods 14 and 16.
  • the respective hollow chamber 32, 36 and 38 can as
  • Ball segment be formed.
  • the hollow chamber 32 is formed as a half-hollow sphere or half-hollow sphere segment.
  • any other geometries such as cylinders, cones, freeform, etc. are possible.

Landscapes

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

Abstract

La présente invention concerne un élément soupape (22) pour une turbine (10) de turbocompresseur à gaz d'échappement, qui comporte un corps de soupape (24) à l'aide duquel une quantité de gaz d'échappement passant par un canal de dérivation de la turbine (10) peut être régulée. Selon l'invention, le corps de soupape (24) présente sur un premier côté (30) au moins une première chambre creuse (32) et sur un second côté (34), opposé au premier côté (30), au moins une seconde chambre creuse (36, 38).
PCT/EP2017/000089 2016-03-09 2017-01-26 Élément soupape pour turbine de turbocompresseur à gaz d'échappement WO2017153025A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016002859.9 2016-03-09
DE102016002859.9A DE102016002859A1 (de) 2016-03-09 2016-03-09 Ventilelement für eine Turbine eines Abgasturboladers

Publications (1)

Publication Number Publication Date
WO2017153025A1 true WO2017153025A1 (fr) 2017-09-14

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ID=57963154

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Application Number Title Priority Date Filing Date
PCT/EP2017/000089 WO2017153025A1 (fr) 2016-03-09 2017-01-26 Élément soupape pour turbine de turbocompresseur à gaz d'échappement

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DE (1) DE102016002859A1 (fr)
WO (1) WO2017153025A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11255255B2 (en) * 2020-04-10 2022-02-22 Borgwarner Inc. Turbocharger including a wastegate assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439432C1 (de) * 1994-11-04 1995-11-02 Daimler Benz Ag Abgasklapppe
DE102006058102A1 (de) * 2006-12-09 2008-06-12 Daimler Ag Brennkraftmaschine mit Abgasturbolader

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4439432C1 (de) * 1994-11-04 1995-11-02 Daimler Benz Ag Abgasklapppe
DE102006058102A1 (de) * 2006-12-09 2008-06-12 Daimler Ag Brennkraftmaschine mit Abgasturbolader

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Publication number Publication date
DE102016002859A1 (de) 2017-09-14

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