WO2014121986A1 - Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement - Google Patents

Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement Download PDF

Info

Publication number
WO2014121986A1
WO2014121986A1 PCT/EP2014/050690 EP2014050690W WO2014121986A1 WO 2014121986 A1 WO2014121986 A1 WO 2014121986A1 EP 2014050690 W EP2014050690 W EP 2014050690W WO 2014121986 A1 WO2014121986 A1 WO 2014121986A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
valve unit
valve
bearing shell
turbine
Prior art date
Application number
PCT/EP2014/050690
Other languages
German (de)
English (en)
Inventor
Florian Arndt
Marko Künstner
Original Assignee
Volkswagen Aktiengesellschaft
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 Volkswagen Aktiengesellschaft filed Critical Volkswagen Aktiengesellschaft
Priority to EP14701934.3A priority Critical patent/EP2954182A1/fr
Publication of WO2014121986A1 publication Critical patent/WO2014121986A1/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
    • F02B37/186—Arrangements of actuators or linkage for bypass valves
    • 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 unit for a wastegate system and such
  • Wastegate system comprehensive exhaust gas turbocharger
  • Exhaust gas turbochargers serve to increase the efficiency and efficiency of
  • Exhaust gas turbochargers include a turbine with a turbine runner, which by a
  • Exhaust gas flow which is ejected from an internal combustion engine, flows and thereby driven in rotation.
  • the rotational movement transmits the turbine wheel by means of a shaft to a compressor wheel.
  • the rotation of the compressor wheel ensures the pressure increase of the fresh gas supplied to the internal combustion engine.
  • the compressor output thus depends directly on the enthalpy of the exhaust gas flow, although the actual desired compressor output does not always correlate with the current exhaust gas flow.
  • Wastegate This is a controllable or controllable bypass, over which a part of the exhaust gas can be guided past the turbine.
  • a valve element is used regularly, which more or less releases the bypass cross-section as a function of its position.
  • the actuation of the valve body takes place by means of an actuator.
  • this is usually arranged away from the turbine and integrated, for example, in the compressor part of the exhaust gas turbocharger to keep its thermal load low.
  • the actuation of the valve element by the actuator then takes place by means of an actuating element.
  • the actuating element may comprise a bearing section, which is rotatably mounted in a bearing shell integrated in the housing of the exhaust gas turbocharger and which extends with one end into the bypass of the wastegate system.
  • an actuating portion may be fixed, which extends in the radial direction of the bearing portion and at the end of the
  • Valve element is attached. By a rotation of the bearing portion of the actuating element thus the valve element is moved.
  • the rotational movement can be effected by means of an actuator portion of the actuating element, which is located on the other, outside the Housing of the exhaust gas turbocharger located end of the bearing portion is fixed and can also extend in the radial direction thereto.
  • a translatory movement of the actuator section by the actuator is thus translated into a rotational movement of the bearing section and this then again in a translational movement of the valve element.
  • Valve element is transmitted. To this freedom of play in the field of storage of
  • Spring loading causes the desired backlash of storage in the axial direction, but at the same time allows to allow different, thermally induced elongations of the bearing shell and actuator.
  • EP 1 644 625 B1 Such an exhaust gas turbocharger with wastegate system is known from EP 1 644 625 B1.
  • the spring element is arranged on the outside of the housing side of the bearing shell, while in the contact point on the inner side of the bearing shell, two sealing discs are provided, which are pressed against each other as a result of the spring load.
  • the particularly good sealing is specified in EP 1 644 625 B1, whereby leakage of exhaust gas from the housing of the exhaust gas turbocharger via the bearing of the actuating element can be avoided.
  • Wastegate system are also devoted to JP 05248253 A and JP 08334030 A. There is provided, the different, thermally induced elongation of the bearing shell and
  • Temperature level in the region of the turbine of the exhaust gas turbocharger depends, but is subject to load-dependent significant fluctuations even when the engine is operating warm.
  • the invention was based on the object, an improved or alternative valve unit for a wastegate system of an exhaust gas turbocharger specify.
  • a valve unit should be specified, which despite a backlash over a wide operating temperature range allows a leak in the storage of the actuator.
  • valve unit for a wastegate according to independent claim 1.
  • An exhaust gas turbocharger comprising such a valve unit is the subject matter of independent patent claim 6.
  • the invention is based on the finding that a backlash of storage of the
  • Actuating element in the bearing shell of the housing in combination with a compensation of different, thermally induced elongations of actuator and bearing shell can best be achieved by an axial spring action, as is generally known from EP 1 644 625 B1.
  • Another, the invention is based knowledge that such axial spring loading inevitably leads to a substantial tightness of storage by a support or a stop must be formed between the actuator and the bearing shell, which / counteracts the spring loading. This is especially true when the spring loading, as in the
  • EP 1 644 625 B1 is produced by a disc spring.
  • additional sealing disks such as are provided in the area of the support in EP 1 644 625 B1, are not required for achieving a good seal (they can rather have a positive influence on the wear behavior.)
  • a basic idea of the invention is also that a leak In the field of storage of the actuating element is not only unproblematic, but may also have advantages.
  • the basic idea of the invention is therefore to modify a bearing of the actuating element of a generic valve unit in such a way that, in spite of the axial
  • a generic valve unit for a wastegate system the (at least) one
  • Valve element (at least) an actuating element for the valve element and (at least) a bearing shell in which the actuating element is rotatably mounted, wherein the actuating element by means of (at least) a spring element in the axial direction (ie in the direction of the axis of rotation) acts against the bearing shell is, is therefore
  • a passage for exhaust gas is provided in the region (at least) one (by the spring action) against each other acted contact surface pairing (at least) . It can preferably be provided that the passage is formed by the fact that at least one of the contact surfaces (at least) one from an outer edge of the
  • Contact surface inwards i. more or less, substantially radially extending recess, e.g. in the form of a groove or recess.
  • the course of the depression can be rectilinear or curved.
  • a leak-inducing intermediate element such as, for example, a washer with recesses (grooves) or a toothed disk.
  • the spring element is designed in the form of a plate spring.
  • Embodiment may be: Relatively large spring forces at relatively small
  • a wave washer may be a preferred alternative to a cup spring.
  • the characteristic shape of a plate spring with a conical or conical annular shell be disadvantageous because it has a comparatively good sealing effect by a closed on both sides annular contact with the components on which it is supported.
  • the disc spring (at least) has a passage for exhaust gas, in particular in the form of a recess extending from an inner edge to an outer edge of the disc spring, e.g. in the form of a bead can be provided.
  • the plate spring can also have, for example, (at least) one passage opening in its annular shell.
  • valve unit according to the invention may further be provided that bilaterally. at the inner and the outer end of the
  • An exhaust gas turbocharger comprises (at least) one (single- or multi-part) housing, (at least) a turbine rotatably mounted within a turbine chamber of the housing, (at least) an inlet for supplying exhaust gas into the turbine chamber and an outlet for removing the exhaust gas from the exhaust gas Turbine space and a wastegate for the exhaust gas to bypass the turbine chamber, wherein the amount of exhaust gas passed through the wastegate system is controllable by means of a valve unit according to the invention.
  • the bearing shell of the valve unit is preferably integrated into the housing (i.e., fixed in or integral with the housing).
  • FIG. 1 shows an embodiment of an exhaust gas turbocharger according to the invention in a partially sectioned, perspective view
  • FIG. 2 shows the valve unit of the exhaust-gas turbocharger according to FIG. 1 in a front view
  • FIG. 3 shows a part of the valve unit according to FIG. 2 in a perspective illustration
  • Fig. 4 a plate spring of the valve unit of FIG. 2;
  • FIG. 5 shows a first embodiment of a bearing shell for possible use in one
  • FIG. 6 shows a second embodiment of a bearing shell for possible use in one
  • the embodiment of the exhaust gas turbocharger according to the invention shown in FIG. 1 comprises a turbine 10 and a compressor 12.
  • the turbine 10 comprises a
  • Turbine housing 16 which forms a turbine inlet channel 18, a turbine outlet channel 20 and a turbine chamber 22, which merge into each other in a fluid-conducting manner.
  • Turbine space 22 is a turbine wheel 24 rotatably mounted. Exhaust discharged from an internal combustion engine (not shown) may flow into the turbine chamber 22 via the turbine inlet passage 18 where it rotatively drives the turbine runner 24. After the flow around the turbine runner 24, the exhaust gas flows via the turbine outlet passage 20.
  • the rotation of the turbine runner 24 is transmitted via a (non-visible) shaft to a (non-visible) compressor impeller, which is rotatably mounted in a compressor chamber of the compressor 12.
  • a compressor impeller By rotating the compressor impeller, fresh gas supplied to the compressor via a (not visible) compressor inlet passage can be compressed.
  • the compressed fresh gas can then be discharged via a compressor outlet channel 26 and fed to the combustion chamber of the internal combustion engine.
  • the exhaust gas turbocharger has a so-called wastegate system. Through the wastegate system, a defined portion of the exhaust gas supplied to the exhaust gas turbocharger can be guided past the turbine runner 24.
  • the wastegate system comprises a valve unit with a valve element 28 which, depending on the position of the valve unit, more or less closes a bypass channel of the wastegate system. Furthermore, the wastegate system comprises a multi-part actuating element. This comprises a bearing shaft 30, at one end of which one end of a valve arm 32 is secured against rotation. The other end of the valve arm 32 is connected to the valve element 28. At the other end of the bearing shaft 30, one end of an actuating arm 34 is rotatably attached. The bearing shaft 30 is rotatably supported within a tubular bearing shell 36. The bearing shell 36 itself is arranged in a bearing bore of the turbine housing 16.
  • the wastegate system further comprises an adjusting device 38.
  • This comprises an actuator, for example, pneumatically or electrically actuated, which translates an actuator piston 40 as a function of a control signal, which is supplied for example by a motor control.
  • This actuator piston 40 is rotatably connected at its free end to the other end of the actuating arm 34. A translational movement of the actuator piston 40 leads to a pivoting movement of the actuating arm 34, wherein the
  • Bearing shaft 30 serves as a rotation axis of this pivoting movement.
  • the rotation of the bearing shaft 30 leads to a corresponding pivoting of the valve arm 32 and thus to a more or less wide lifting of the valve element 28 from its valve seat.
  • the width of the thus released annular gap between the valve element 28 and the valve seat defines the amount of exhaust gas carried over the bypass passage.
  • the bearing of the actuating element in the bearing shell 36 should be as free of play as possible.
  • the backlash should also be achieved over the wide range of temperatures which the exhaust-gas turbocharger can have, in particular on the turbine side during operation.
  • the actuating element by means of two disc springs 42 axially (relative to the longitudinal axis of the bearing shaft 30) is braced against the bearing shell 36.
  • the plate springs 42 are arranged under prestress between the end faces of the bearing shell 36 and the valve arm 32 or the actuating arm 34.
  • the plate springs 42 can compensate for different thermal elongations of the bearing shell 36 on the one hand and (in particular) the bearing shaft 30 on the other hand.
  • the valve unit has a defined leak.
  • the two disc springs 42 are each provided with two radially extending beads 44. Exhaust gas, which flows out of the bypass passage into the turbine outlet passage 18 when the valve element 28 is open via the beads 44 of the plate bushes 36 clamped between the bearing shell 36 and the actuation element, can firstly pass into the annular gap which extends between the valve seat
  • Bearing shell 36 and the bearing shaft 30 is formed, flow and flow from there via the beads 44 from the exhaust gas turbocharger.
  • the inside of the bearing shell 36 and / or the outside of the bearing shaft 30 at least one recess which extends along the annular gap formed between the bearing shell 36 and bearing shaft 30 and extends axially from the inner to the outer end.
  • This at least one depression can be straight or curved, e.g. run helically along the inside or the outside. In this way, a controlled predetermined leakage of the valve unit of the wastegate is additionally supported.
  • Embodiment according to FIG. 5 four radially extending recesses 14 are provided per contact surface and, in the embodiment according to FIG. 6, a spiral-shaped or curved depression 14 is provided.
  • a spiral-shaped or curved depression 14 is provided.

Landscapes

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

Abstract

Unité soupape pour un système wastegate d'un turbocompresseur à gaz d'échappement qui comporte un élément soupape (28), un élément d'actionnement pour l'élément soupape (28) et un coussinet (36) dans lequel l'élément d'actionnement est monté rotatif, ledit élément d'actionnement étant soumis à l'action d'un élément ressort dans la direction axiale à l'encontre du coussinet (36) Un passage pour des gaz d'échappement est prévu dans la zone des surfaces de contact, contraintes l'une contre l'autre, du coussinet (36) et de l'élément d'actionnement.
PCT/EP2014/050690 2013-02-05 2014-01-15 Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement WO2014121986A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14701934.3A EP2954182A1 (fr) 2013-02-05 2014-01-15 Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013001978.8A DE102013001978A1 (de) 2013-02-05 2013-02-05 Ventileinheit für ein Wastegatesystem und Abgasturbolader
DE102013001978.8 2013-02-05

Publications (1)

Publication Number Publication Date
WO2014121986A1 true WO2014121986A1 (fr) 2014-08-14

Family

ID=50030255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/050690 WO2014121986A1 (fr) 2013-02-05 2014-01-15 Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement

Country Status (3)

Country Link
EP (1) EP2954182A1 (fr)
DE (1) DE102013001978A1 (fr)
WO (1) WO2014121986A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10711690B2 (en) 2018-11-06 2020-07-14 Borgwarner Inc. Wastegate assembly and turbocharger including the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101655616B1 (ko) 2014-12-15 2016-09-08 현대자동차주식회사 웨이스트 게이트 모듈 지지 장치
CN106285919B (zh) * 2015-05-22 2019-05-03 广州汽车集团股份有限公司 废气旁通装置及具有其的涡轮增压器
US10570815B2 (en) 2017-10-19 2020-02-25 Garrett Transportation I Inc. Wastegate valve assembly with biasing members

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05248253A (ja) 1992-03-09 1993-09-24 Aisan Ind Co Ltd ターボチャージャ用ウェストゲートバルブ
JPH08334030A (ja) 1995-06-06 1996-12-17 Aisan Ind Co Ltd ターボ・チャージャのウェイスト・ゲート・バルブ
JP2005351089A (ja) * 2004-06-08 2005-12-22 Ishikawajima Harima Heavy Ind Co Ltd 過給機およびシール装置
DE102009030520A1 (de) * 2008-07-25 2010-01-28 Borgwarner Inc., Auburn Hills Regelklappenanordnung eines Abgasturboladers
EP1644625B1 (fr) 2003-07-11 2012-02-22 LEAVESLEY, Malcolm George Appareil turbocompresseur presentant un systeme d'etancheite de gaz d'echappement permettant d'eliminer des fuites de gaz provenant de l'appareil turbocompresseur
DE202011109832U1 (de) * 2011-06-17 2012-04-03 Elringklinger Ag Betätigungseinrichtung für ein Abgasstrom-Steuerelement eines Abgasturboladers
EP2574754A2 (fr) * 2011-08-27 2013-04-03 Volkswagen Aktiengesellschaft Dispositif de soupape, turbosoufflante avec dispositif de soupape, moteur à combustion avec turbosoufflante et véhicule automobile avec moteur à combustion
WO2013048687A1 (fr) * 2011-09-27 2013-04-04 Borgwarner Inc. Support semi-perméable tenant de façon étanche un arbre d'actionnement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005113797A (ja) * 2003-10-08 2005-04-28 Aisin Seiki Co Ltd ターボチャージャの排気ガスシール構造
JP4438524B2 (ja) * 2004-06-08 2010-03-24 株式会社Ｉｈｉ 過給機
US9097177B2 (en) * 2009-05-18 2015-08-04 Borgwarner Inc. Turbocharger

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05248253A (ja) 1992-03-09 1993-09-24 Aisan Ind Co Ltd ターボチャージャ用ウェストゲートバルブ
JPH08334030A (ja) 1995-06-06 1996-12-17 Aisan Ind Co Ltd ターボ・チャージャのウェイスト・ゲート・バルブ
EP1644625B1 (fr) 2003-07-11 2012-02-22 LEAVESLEY, Malcolm George Appareil turbocompresseur presentant un systeme d'etancheite de gaz d'echappement permettant d'eliminer des fuites de gaz provenant de l'appareil turbocompresseur
JP2005351089A (ja) * 2004-06-08 2005-12-22 Ishikawajima Harima Heavy Ind Co Ltd 過給機およびシール装置
DE102009030520A1 (de) * 2008-07-25 2010-01-28 Borgwarner Inc., Auburn Hills Regelklappenanordnung eines Abgasturboladers
DE202011109832U1 (de) * 2011-06-17 2012-04-03 Elringklinger Ag Betätigungseinrichtung für ein Abgasstrom-Steuerelement eines Abgasturboladers
EP2574754A2 (fr) * 2011-08-27 2013-04-03 Volkswagen Aktiengesellschaft Dispositif de soupape, turbosoufflante avec dispositif de soupape, moteur à combustion avec turbosoufflante et véhicule automobile avec moteur à combustion
WO2013048687A1 (fr) * 2011-09-27 2013-04-04 Borgwarner Inc. Support semi-perméable tenant de façon étanche un arbre d'actionnement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10711690B2 (en) 2018-11-06 2020-07-14 Borgwarner Inc. Wastegate assembly and turbocharger including the same

Also Published As

Publication number Publication date
EP2954182A1 (fr) 2015-12-16
DE102013001978A1 (de) 2014-08-07

Similar Documents

Publication Publication Date Title
EP2209969B1 (fr) Dispositif de suralimentation
DE102017202137B4 (de) Klappeneinrichtung zum Öffnen und Schließen eines Wastegatekanals in einem Turbinengehäuse eines Turboladers sowie Turbolader
DE10297203T5 (de) Turbolader
DE102010028982B4 (de) Drosselvorrichtung
EP2529097A1 (fr) Ensemble d'étanchéité pour un dispositif de réglage d'un moteur à combustion interne
EP2992255B1 (fr) Soupape à entraînement électrique pour régulation de débit volumique dans un système de chauffage ou de refroidissement pour un véhicule automobile
WO2014121986A1 (fr) Unité soupape pour un système wastegate et turbocompresseur à gaz d'échappement
EP2929165B1 (fr) Dispositif à clapet pour moteur à combustion interne
DE10237413B4 (de) Abgasturbolader für eine Brennkraftmaschine
EP2420651B1 (fr) Agencement de paliers pour le compresseur d'un turbocompresseur d'un moteur à combustion interne
DE102008063212A1 (de) Welleneinrichtung mit wenigstens einer Dichtungsvorrichtung
EP2406498B1 (fr) Pompe de liquide de refroidissement à régulation
DE102008060251B4 (de) Abgasturbolader mit variabler Turbinengeometrie
WO2010054884A2 (fr) Agencement d'arbre avec dispositif d'étanchéité
EP3371430A1 (fr) Pompe à liquide de refroidissement pour un moteur à combustion interne
DE102010054914A1 (de) Leiteinrichtung für eine Fluidenergiemaschine, insbesondere für einen Abgasturbolader
DE102010005603A1 (de) Nockenwellenverstellanordnung
DE202014009993U1 (de) Dichtung für ein Ventil eines Verbrennungsmotors
DE102009041125B4 (de) Gasdynamische Druckwellenmaschine
EP1637783B1 (fr) Combinaison de soupape pour turbine à vapeur avec une soupape à fermeture rapide et une soupape de régulation
DE102004024056B4 (de) Ventil für eine Abgasleitung
DE102013208245A1 (de) Stellgliedanordnung für einen Abgasturbolader
WO2014090352A1 (fr) Dispositif soupape pour une turbine d'un turbocompresseur
DE102007022059A1 (de) Hubmagnetanordnung
WO2019110581A1 (fr) Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14701934

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2014701934

Country of ref document: EP