EP4090841A1 - Ensemble soupape pour moteur à combustion interne - Google Patents

Ensemble soupape pour moteur à combustion interne

Info

Publication number
EP4090841A1
EP4090841A1 EP21700376.3A EP21700376A EP4090841A1 EP 4090841 A1 EP4090841 A1 EP 4090841A1 EP 21700376 A EP21700376 A EP 21700376A EP 4090841 A1 EP4090841 A1 EP 4090841A1
Authority
EP
European Patent Office
Prior art keywords
shaft
valve seat
internal combustion
combustion engine
control body
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21700376.3A
Other languages
German (de)
English (en)
Inventor
Bernhard Bronischewski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP4090841A1 publication Critical patent/EP4090841A1/fr
Pending legal-status Critical Current

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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • 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
    • F16K1/24—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 valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • 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 device for an internal combustion engine with a flow housing in which a channel is formed, a valve seat which is arranged in the channel and which delimits a flow cross-section, a control body which can be lowered onto the valve seat to regulate the flow cross-section and at least partially from Valve seat is pivotable away, a rotatable shaft via which the control body is pivotable, and a coupling member via which the control body is coupled to the shaft.
  • valve devices are used in internal combustion engines, for example, to regulate an exhaust gas flow in the exhaust system.
  • regulating bodies In order to produce a tight seal, it is known, for example, to use regulating bodies with a piston ring which rests against the surrounding wall surface or valve seat surface in order to ensure sufficient tightness.
  • valve devices which have a flap-shaped regulating body, and in which a line-shaped contact between the valve seat and the regulating body is established when the regulating body rests on the valve seat, in order to produce a tight seal of the channel, in that the regulating body has a radius on its flap edge is performed while the valve seat is conical or frustoconical. If the angle of incidence of the valve seat and the radius of the flap edge are correctly designed, the control element coupled to the shaft can then be turned away from the valve seat or rotated back on the valve seat to regulate the exhaust gas flow by rotating the shaft become.
  • the channel can be designed as a straight channel, the central axis of which runs at least parallel in front of and behind the valve seat.
  • a similar valve device of this type is known, for example, from DE 11 2014 006 032 T5.
  • the flap body of this valve is arranged double eccentrically to the axis of rotation and has a conically shaped flap edge which must correspond exactly to the equally conically shaped valve seat in order to ensure sufficient tightness.
  • an exhaust gas recirculation device in which a lateral lateral surface of the control body, which can be placed on a truncated cone-shaped valve seat, has a spherical section in order to obtain a tight seal.
  • the regulating body is connected to a rotary shaft via a coupling member, so that the regulating body can be pivoted onto the valve seat or pivoted away from it by rotating the shaft.
  • the manufacturing and / or installation effort is very high, since either an additional seal has to be installed or very precise installation and production with low tolerances is required or complex mounting of the flaps is required in order to avoid damage to the bearings in the event of pulsations.
  • the object is therefore to provide a valve device for an internal combustion engine which, on the one hand, is inexpensive to manufacture and assemble, and which nevertheless ensures a high level of tightness.
  • the pressure loss in the system must also be kept as low as possible. Additional loads due to vibrations occurring on the valve device are also to be avoided.
  • This object is achieved by a valve device for an internal combustion engine with the features of main claim 1. Because the radius of the control body from an axis of symmetry of the control body to the edge of the control body, with which the control body rests on the valve seat in the closed state, corresponds to a distance between an axis of rotation of the shaft and the valve seat, there is contact during the entire rotation of the control body between the valve seat and the control body so that it is guided on the valve seat. This leads to great insensitivity to external vibrations or pulsations in the medium to be controlled. This protects the bearings used, so that the shaft can also be supported on one side. Manufacturing and assembly costs can thus be reduced.
  • the valve seat is preferably designed in the shape of a truncated cone and the control body edge, with which the control body rests on the valve seat in the closed state, is spherically shaped.
  • spherically shaped is to be understood as meaning that it is a spherical shape.
  • conical can also be understood.
  • the coupling element and the regulating body advantageously have a common axis of symmetry which intersects the axis of rotation of the shaft, thereby facilitating manufacture and assembly and avoiding assembly errors. Furthermore, it is advantageous if the regulating body is movable relative to the shaft and a spring loads the regulating body in a direction pointing away from the shaft. The execution allows tolerances to be compensated so that sticking due to inaccurate manufacturing or assembly is avoided. Nevertheless, the constant contact of the control body with the valve seat is ensured during the entire rotation of the control body. This avoids the transmission of existing vibrations to the control body and thus to the bearings or the other coupled components, which lead to an increased load.
  • the spring is arranged between the control body and the shaft and surrounds a coupling rod serving as a coupling element, whereby the spring is guided and is protected against kinking. Furthermore, the pressure force can be applied directly without having to provide additional shoulders.
  • the regulating body is mounted on the coupling rod so as to be translationally displaceable, and a stop is formed on the coupling rod, which is formed on the side of the regulating body opposite to the shaft.
  • the coupling rod is mounted in a transverse bore of the shaft so as to be translationally movable, and a stop is formed on the coupling rod, which is formed on the side of the shaft opposite to the control body.
  • the tolerance compensation is still implemented very easily, but the assembly is simplified because the coupling rod no longer has to be attached to the shaft.
  • the stop is arranged in an easily accessible area. A particularly simple implementation of the stop results when the stop of the coupling rod is formed by a nut which is turned onto a thread of the coupling rod.
  • Such a valve device is inexpensive and easy to manufacture and assemble.
  • the manufacturing and assembly costs can be reduced by bearing the shaft on one side in the flow housing. This is made possible by the guided sliding of the control body on the valve seat, which avoids bending stresses on the bearing.
  • the flow cross-section of the channel on the side of the valve seat facing the shaft is preferably greater than that
  • the flow cross-section on the valve seat and the flow direction upstream and downstream of the valve seat are in the same direction.
  • the central axes upstream of the valve seat and downstream of the valve seat can either be the same or run parallel to one another slightly offset. As a result, only a very small installation space is required and the pressure loss is reduced, so that the flow rates are increased.
  • the enlargement of the flow cross-section ensures that the control body can be rotated in the channel.
  • the enlargement of the flow cross section of the channel on the side of the valve seat facing the shaft is formed by a cutout which is formed on the side of the flow housing to which the control body is rotatable.
  • the channel is machined as a function of the control element, while the rest of the channel wall remains unchanged. In this way, the cross-sectional jumps are reduced to a minimum.
  • a valve device for an internal combustion engine is thus created which enables large throughflows with low pressure losses and has a high degree of tightness.
  • the required installation space as well as the assembly and manufacturing effort are reduced by the fact that the control body is guided on the valve seat over the entire swivel range.
  • valve device according to the invention for an internal combustion engine is shown in the figures and is described below.
  • FIG. 1 shows a side view of a valve device according to the invention with a regulating body which is located in a position closing the channel, in a sectional illustration.
  • FIG. 2 shows a side view of the valve device according to the invention from FIG. 1 with a regulating body which is located in a position in which the channel is completely open, in a sectional illustration.
  • FIG. 3 shows a perspective illustration of the valve device according to the invention from FIG. 1 with a control body which is in a position that partially opens the channel.
  • the valve device according to the invention has a flow housing 10 which delimits a passage 12 through which a flow can flow.
  • Flow housing 10 is formed with a shoulder 14 against which a ring 17 serving as a valve seat 16 rests, which radially delimits a flow cross section 18 to be regulated.
  • the valve seat 16 has a truncated cone shape.
  • An opening is formed in the flow housing 10 in which a bearing is arranged, through which a shaft 20 protrudes from the interior of the flow housing 10 to the outside, where the shaft 20 is connected to an actuator via which the shaft 20 can be rotated.
  • the shaft 20 has a transverse bore 22 through which one serving as a coupling member 24 Coupling rod protrudes, at the first end of which protrudes from the transverse bore 22 a thread 26 is formed, on which a nut 28 and a lock nut 29 are rotated, the nut 28 serving as a stop 30 and resting against a flat 32 on the shaft 20.
  • a regulating body 34 is attached, which is essentially plate-shaped and has a common axis of symmetry 36 with the coupling rod 24, which intersects an axis of rotation 38 of the shaft 20.
  • a control body edge 40 of the control body 34 which radially delimits the control body 34, is at least partially designed spherically or in the shape of a spherical section. With this control body edge 40, the control body 34 rests completely on the frustoconical valve seat 16 in a state that closes the channel 12, so that a circumferential line contact and thus a circumferential seal is created.
  • the coupling rod 24 is surrounded by a pretensioned spring 42 designed as a helical spring, the first end of which rests against the shaft 20 and the second end of which rests against a contact surface 44 on the regulating body 34.
  • the spring is a compression spring via which the regulating body 34 is loaded in a direction pointing away from the shaft 20.
  • the coupling rod 24 is translationally displaceable in the transverse bore 22, so that the spring 42 presses the nut 28 against the flat 32 of the shaft 20, whereby the translational movement of the coupling rod 24 and thus of the control body 34 is limited.
  • a radius R of the regulating body 34 corresponds to a distance A of the axis of rotation 38 of the shaft 20 and a plane spanned by the valve seat 16. This leads to the fact that when the shaft 20 rotates, the regulating body 34 slides along the valve seat 16 up to the position that completely exposes the flow cross section 18, ie it always touches it. Since the control body 34 protrudes radially beyond the edge of the valve seat 16 in most positions when the shaft 20 rotates, the channel 12 is formed with a correspondingly shaped cutout 46 which enables the control body 34 to pivot freely.
  • the available flow cross-section on the side of the valve seat 16 on which the shaft 20 protrudes into the channel 12 is larger than on the opposite side, so that the shoulder 14 is also selected so that the ring forming the valve seat 16 from the side is pushed into the flow housing 10 and against the shoulder 14 on which the shaft 20 protrudes into the channel 12. Nevertheless, the direction of flow remains the same, so that pressure losses due to deflections are reduced.
  • the regulating body 34 When the shaft 20 rotates and the regulating body 34 is pivoted from the valve seat 16, the regulating body 34 is always loaded by the spring 42, among other things, in the direction of the valve seat 16 and thus always rests on it. During the movement, the edge of the control element 40 grinds against the valve seat 16. Regardless of the pressure pulsations that occur in the exhaust gas tract, the control element remains in contact with the valve seat, thereby avoiding bending forces on the bearing or alternating forces acting on the bearing. When the valve is fully open, almost the entire flow cross-section is available on the valve seat also in the further course, so that this valve device enables very large volume flows with a small installation space.

Landscapes

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

Abstract

L'invention concerne des ensembles soupapes pour moteurs à combustion interne, comprenant : un boîtier d'écoulement (10), dans lequel un canal (12) est formé ; un siège de soupape (16) qui est disposé dans le canal (12) et limite une section transversale d'écoulement (18) ; un élément de commande (34) qui peut être abaissé sur le siège de soupape (16) pour commander la section transversale d'écoulement (18) et peut être au moins partiellement pivoté à l'opposé du siège de soupape (16) ; un arbre rotatif (20) par l'intermédiaire duquel l'élément de commande (34) peut pivoter ; et un élément d'accouplement (24) par l'intermédiaire duquel l'élément de commande (34) est accouplé à l'arbre (20). Pour permettre de construire un tel ensemble soupape avec les dimensions les plus petites possible et de créer un joint d'étanchéité élevé à de faibles coûts de fabrication, selon l'invention, un rayon (R) de l'élément de commande (34) à partir d'un axe de symétrie (36) de l'élément de commande (34) à un bord d'élément de commande (40) avec lequel l'élément de commande repose contre le système de soupape (16) dans l'état fermé, correspond à une distance (A) entre un axe de rotation (38) de l'arbre (20) et le siège de soupape (16).
EP21700376.3A 2020-01-16 2021-01-07 Ensemble soupape pour moteur à combustion interne Pending EP4090841A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020100952.6A DE102020100952B4 (de) 2020-01-16 2020-01-16 Ventilvorrichtung für eine Verbrennungskraftmaschine
PCT/EP2021/050160 WO2021144183A1 (fr) 2020-01-16 2021-01-07 Ensemble soupape pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP4090841A1 true EP4090841A1 (fr) 2022-11-23

Family

ID=74184624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21700376.3A Pending EP4090841A1 (fr) 2020-01-16 2021-01-07 Ensemble soupape pour moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP4090841A1 (fr)
DE (1) DE102020100952B4 (fr)
WO (1) WO2021144183A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023227207A1 (fr) * 2022-05-24 2023-11-30 Pierburg Gmbh Dispositif clapet pour moteur à combustion interne
CN114909481A (zh) * 2022-05-31 2022-08-16 江苏南通发电有限公司 一种翻板式泄压阀

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4248403A (en) * 1979-01-08 1981-02-03 Leslie, Co. Plug assembly for movable plug valves
DE3677908D1 (de) * 1985-05-30 1991-04-11 Fritz Schmidt Absperrorgan fuer rohrleitungen.
US6378842B1 (en) * 2000-07-20 2002-04-30 Delaware Capital Formation, Inc. V-ball control valve
JP2003172211A (ja) * 2001-12-06 2003-06-20 Hitachi Metals Ltd 排気ガス再循環バルブ
DE102004054164B4 (de) 2004-11-10 2011-06-16 Pierburg Gmbh Abgasrückführvorrichtung für eine Verbrennungskraftmaschine
JP2011196464A (ja) 2010-03-19 2011-10-06 Denso Corp ボール弁型バルブ装置
CN105874250B (zh) 2013-12-25 2018-02-27 爱三工业株式会社 双偏心阀

Also Published As

Publication number Publication date
DE102020100952A1 (de) 2021-07-22
WO2021144183A1 (fr) 2021-07-22
DE102020100952B4 (de) 2023-10-05

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