DE4422328A1 - Valve seat insert for a mixture inlet valve of an internal combustion engine - Google Patents

Valve seat insert for a mixture inlet valve of an internal combustion engine

Info

Publication number
DE4422328A1
DE4422328A1 DE4422328A DE4422328A DE4422328A1 DE 4422328 A1 DE4422328 A1 DE 4422328A1 DE 4422328 A DE4422328 A DE 4422328A DE 4422328 A DE4422328 A DE 4422328A DE 4422328 A1 DE4422328 A1 DE 4422328A1
Authority
DE
Germany
Prior art keywords
valve
valve seat
flow
seat ring
inlet valve
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.)
Withdrawn
Application number
DE4422328A
Other languages
German (de)
Inventor
Peter-Wolfgang Dr Manz
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE4422328A priority Critical patent/DE4422328A1/en
Publication of DE4422328A1 publication Critical patent/DE4422328A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/06—Valve members or valve-seats with means for guiding or deflecting the medium controlled thereby, e.g. producing a rotary motion of the drawn-in cylinder charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/22—Valve-seats not provided for in preceding subgroups of this group; Fixing of valve-seats
    • 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
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • F02M29/14—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture re-atomising or homogenising being effected by unevenness of internal surfaces of mixture intake
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

For eliminating the wall film flow in an inlet port (1) by simple but effective measures, the valve seat insert (6) of the inlet valve (2) has an annular necking (8), reducing the flow cross-section like a funnel and forming a sharp edge (9). The said necking is designed so that the liquid fuel carried off from the sharp edge (9) by the flow passes to the rear side (3) of the valve disc (4) of the inlet valve (2) from where it is moved by the flow in the direction of the boundary of the valve disc (4), which now serves as sharp edge. <IMAGE>

Description

Die Erfindung betrifft einen Ventilsitzring für ein Gemisch- Einlaßventil einer Brennkraftmaschine, d. h. einer Maschine, bei der die Gemischbildung in einem Vergaser oder durch Kraftstoff­ einspritzung in das Saugrohr bzw. den Einlaßkanal erfolgt.The invention relates to a valve seat ring for a mixture Intake valve of an internal combustion engine, i. H. a machine at the mixture formation in a carburetor or by fuel injection into the intake manifold or the inlet duct.

Bekanntlich besteht bei derartigen Brennkraftmaschinen die Gefahr des Niederschlags von Kraftstoff insbesondere auf relativ kalten Wänden von Saugrohr und Einlaßkanal. Diese Wandfilmbil­ dung hat nachteilige Einflüsse auf die Bildung eines homogenen Kraftstoff-Luft-Gemischs und damit auf den Wirkungsgrad und die Abgaszusammensetzung der Maschine.It is known that there is such an internal combustion engine Risk of precipitation of fuel especially on relative cold walls of intake manifold and inlet duct. This wall film picture manure has adverse effects on the formation of a homogeneous Air-fuel mixture and thus on the efficiency and Exhaust gas composition of the machine.

Zur Beseitigung dieses Wandfilms existiert in der Patentlitera­ tur - genannt sei hier nur die DE-OS 31 51 683, F02M 29/06 - eine Vielzahl von Vorschlägen, denen die Verwendung eines trichterartigen Einsatzes mit sich in Strömungsrichtung ver­ ringerndem freien Durchmesser gemeinsam ist. Dadurch soll der unter dem Einfluß der Gemischströmung wandernde Wandfilm aufge­ fangen und ebenfalls unter der Wirkung der Gemischströmung zer­ stäubt werden.To eliminate this wall film exists in the patent literature tur - only DE-OS 31 51 683, F02M 29/06 should be mentioned here - a variety of proposals that use a funnel-like insert with itself in the direction of flow free diameter is common. This is supposed to wall film migrating under the influence of the mixture flow catch and also zer under the effect of the mixture flow be dusted.

Die bekannten Vorrichtungen dieser Art besitzen den Nachteil, daß sie zwar den vor ihnen gebildeten Wandfilm auffangen und den aufgefangenen Kraftstoff zerstäuben, jedoch nicht verhindern können, daß sich in anschließenden Bereichen von Saugrohr bzw. Einlaßkanal erneut Kraftstoff niederschlägt, also wiederum eine Wandfilmbildung erfolgt.The known devices of this type have the disadvantage that they catch the wall film made in front of them and the  Atomize the collected fuel, but do not prevent it can that in adjacent areas of the intake manifold or Inlet channel again precipitates fuel, so again one Wall film formation takes place.

Der Erfindung liegt die Aufgabe zugrunde, mit einfachen Mitteln eine wirkungsvolle Lösung des Problems der Wandfilmbildung zu schaffen.The invention is based, with simple means the task an effective solution to the problem of wall film formation create.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in einem Ventilsitzring mit den kennzeichnenden Merkmalen des Hauptan­ spruchs, vorteilhafte Ausbildungen der Erfindung beschreiben die Unteransprüche.This object is achieved in one Valve seat ring with the characteristic features of the main valve Describe advantageous embodiments of the invention the subclaims.

Die Erfindung arbeitet zwar ebenfalls mit einer trichterartigen Verringerung des Strömungsquerschnitts unter Bildung einer Ab­ reißkante für flüssigen Kraftstoff, jedoch liegt diese Abreiß­ kante infolge Integration in den Ventilsitzring in unmittelbarer Nähe des Einlaßventils. Dadurch wird im Verein mit einer ent­ sprechenden Ausrichtung der der Strömung zugekehrten Wand der Einziehung ein Transport des dorthin gelangenden flüssigen Kraftstoffs durch die Strömung auf die Rückseite des Einlaß­ ventils ermöglicht, dessen Temperatur infolge der Brennraumnähe relativ hoch ist und das von vornherein eine relativ scharfe, als Abreißkante dienende Begrenzung aufweist.The invention also works with a funnel-like one Reduction of the flow cross section to form an ab tear edge for liquid fuel, but this tear lies edge as a result of integration in the valve seat ring in the immediate vicinity Near the inlet valve. This is in association with an ent speaking orientation of the wall facing the flow Confiscation a transport of the liquid going there Fuel through the flow to the back of the inlet valve allows its temperature due to the proximity of the combustion chamber is relatively high and from the outset a relatively sharp, serving as a tear-off edge.

Die Erfindung bietet weiterhin den fertigungstechnischen Vor­ teil, daß die definierte umlaufende Einziehung bei der Fertigung des Ventilsitzrings angeformt werden kann, so daß sich zusätz­ liche Einsätze zur Bildung der Abreißkante oder schwierige Form­ gebungen im jeweiligen Einlaßkanal erübrigen.The invention also offers the manufacturing technology before part that the defined circumferential confiscation in manufacturing the valve seat ring can be molded, so that additional inserts to form the tear-off edge or difficult shape conditions in the respective inlet duct.

Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnung erläutert, die einen senkrechten Schnitt durch den Zylinderkopf einer Brennkraftmaschine im Bereich eines Einlaß­ kanals wiedergibt.An embodiment of the invention is described below the drawing explains a vertical section through the Cylinder head of an internal combustion engine in the area of an inlet reproduces channel.

Dem Einlaßkanal 1 ist das in üblicher Weise als nockenbetätigtes Hubventil ausgebildete Einlaßventil 2 zugeordnet, das in der Zeichnung im geöffneten Zustand dargestellt ist. Im geschlos­ senen Zustand legt sich das Einlaßventil 2 mit der Rückseite 3 seines Ventiltellers 4 dichtend gegen die Sitzfläche 5 des Ventilsitzrings 6, der in eine entsprechende Ausnehmung am Ende des Einlaßkanals 1 eingesetzt und dort befestigt ist.The inlet valve 1 is assigned the inlet valve 2 , which is designed in the usual way as a cam-operated lift valve and is shown in the drawing in the open state. In the closed state, the inlet valve 2 lies with the rear side 3 of its valve plate 4 sealing against the seat surface 5 of the valve seat ring 6 , which is inserted into a corresponding recess at the end of the inlet channel 1 and fastened there.

Beispielsweise mittels eines nicht gezeichneten, da bekannten Kraftstoffeinspritzventils wird der im Einlaßkanal 1 strömenden Verbrennungsluft Kraftstoff zur Bildung eines Kraftstoff-Luft- Gemischs beigegeben. Beim Auftreffen des Gemischs auf die relativ kalte Begrenzungswand des Einlaßkanals 1 besteht die Gefahr, daß sich Kraftstoff in flüssiger Form unter Bildung eines Wandfilms 7 abscheidet, wodurch die Gemischbildung negativ beeinflußt wird. Zur Beseitigung dieses Wandfilms, der unter dem Einfluß der Strömung im Einlaßkanal 1 in Richtung auf den Ventilteller 4 wandert, bildet der Ventilsitzring 6 über die um­ laufende Einziehung 8 die Abreißkante 9, so daß vom Wandfilm 7 stammender flüssiger Kraftstoff gemäß den Pfeilen von der Strö­ mung mitgerissen wird. Die Einziehung 8 bildet eine trichter­ artige Verringerung des Strömungsquerschnitts, da sie im Quer­ schnitt die Form eines rechtwinkligen Dreiecks besitzt, dessen Hypotenuse 10 der Strömung zugekehrt ist. Diese Hypotenuse 10 ist ferner so ausgerichtet, daß der von der Abreißkante 9 kom­ mende flüssige Kraftstoff auf die Rückseite 3 des Einlaßventils 2 gelangt, von wo er ebenfalls im Sinne der dort gezeichneten Pfeile durch die Strömung zu dem jetzt eine wirksame Abreißkante bildenden Rand des Ventiltellers 4 transportiert wird. Von dort gelangt der mitgerissene Kraftstoff unmittelbar in den heißen Brennraum, wo er schnell zur Gemischbildung beiträgt.For example, by means of a fuel injection valve, which is not shown, since it is known, fuel is added to the combustion air flowing in the inlet duct 1 to form a fuel-air mixture. When the mixture hits the relatively cold boundary wall of the inlet channel 1, there is a risk that fuel in liquid form will separate out to form a wall film 7 , which will have a negative effect on the mixture formation. To eliminate this wall film, which migrates under the influence of the flow in the inlet channel 1 in the direction of the valve plate 4 , the valve seat ring 6 forms the tear-off edge 9 via the current retraction 8 , so that liquid fuel originating from the wall film 7 according to the arrows from the stream mung is carried away. The retraction 8 forms a funnel-like reduction in the flow cross-section, since it has the shape of a right-angled triangle in cross section, the hypotenuse 10 of which faces the flow. This hypotenuse 10 is also oriented so that the coming from the tear-off 9 coming liquid fuel to the rear 3 of the inlet valve 2 , from where it also in the sense of the arrows drawn there by the flow to the now effective tear-off edge of the valve plate 4 is transported. From there, the entrained fuel goes directly into the hot combustion chamber, where it quickly contributes to the mixture formation.

In dem dargestellten Beispiel befindet sich die ringförmige Einziehung 8 an dem - dem Ventilsitz 5 abgekehrten - einströ­ mungsseitigen Ende des Ventilsitzrings 6, wodurch eine sehr einfache Fertigung der Einziehung 8 gewährleistet ist.In the example shown, the annular indentation 8 is located on the inflow-side end of the valve seat ring 6 facing away from the valve seat 5 , as a result of which very simple manufacture of the indentation 8 is ensured.

Claims (3)

1. Ventilsitzring für ein Gemisch-Einlaßventil einer Brennkraft­ maschine, dadurch gekennzeichnet, daß der Ventilsitzring (6) eine seinen Strömungsquerschnitt trichterartig verringernde, eine Abreißkante (9) bildende, ringartig umlaufende Einzie­ hung (8) solcher Auslegung aufweist, daß wandfilmbildender Kraftstoff (7) auf die Rückseite (3) des geöffneten Einlaß­ ventils (2) transportiert wird.1. Valve seat ring for a mixture inlet valve of an internal combustion engine, characterized in that the valve seat ring ( 6 ) has a funnel-like reducing its flow cross-section, a tear-off edge ( 9 ) forming, annular circumferential indentation ( 8 ) such that wall film-forming fuel ( 7th ) is transported to the rear ( 3 ) of the open inlet valve ( 2 ). 2. Ventilsitzring nach Anspruch 1, dadurch gekennzeichnet, daß die Einziehung (8) im Querschnitt ein zumindest annähernd rechtwinkliges Dreieck bildet, dessen der Strömung zugekehrte Hypotenuse (10) auf die Rückseite (3) des Einlaßventils (2) weist.2. Valve seat ring according to claim 1, characterized in that the recess ( 8 ) in cross section forms an at least approximately right-angled triangle, the flow-facing hypotenuse ( 10 ) of which faces the rear ( 3 ) of the inlet valve ( 2 ). 3. Ventilsitzring nach Anspruch 1 oder 2, dadurch gekennzeich­ net, daß die Einziehung (8) am einströmungsseitigen Ende des Ventilsitzrings (6) angeordnet ist.3. Valve seat ring according to claim 1 or 2, characterized in that the retraction ( 8 ) is arranged at the inflow end of the valve seat ring ( 6 ).
DE4422328A 1993-07-08 1994-06-27 Valve seat insert for a mixture inlet valve of an internal combustion engine Withdrawn DE4422328A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4422328A DE4422328A1 (en) 1993-07-08 1994-06-27 Valve seat insert for a mixture inlet valve of an internal combustion engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4322777 1993-07-08
DE4422328A DE4422328A1 (en) 1993-07-08 1994-06-27 Valve seat insert for a mixture inlet valve of an internal combustion engine

Publications (1)

Publication Number Publication Date
DE4422328A1 true DE4422328A1 (en) 1995-01-12

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ID=6492276

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4422328A Withdrawn DE4422328A1 (en) 1993-07-08 1994-06-27 Valve seat insert for a mixture inlet valve of an internal combustion engine

Country Status (2)

Country Link
DE (1) DE4422328A1 (en)
FR (1) FR2707340A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533825C1 (en) * 1995-09-13 1996-11-07 Daimler Benz Ag Cylinder head for internal combustion engine
WO2007104067A2 (en) * 2006-03-14 2007-09-20 Avl List Gmbh Gas exchange channel for an internal combustion engine
FR2915236A3 (en) * 2007-04-20 2008-10-24 Renault Sas Tumble type variable streamline generating device for e.g. petrol engine of motor vehicle, has seat with projecting part formed of revolution surfaces whose dimensions do not modify discharge of intake flow during high lifting
FR2916798A3 (en) * 2007-06-01 2008-12-05 Renault Sas Anti-reflux valve seat for intake duct of cylinder head of average cylinder capacity diesel engine, has lateral surface with impact surfaces for chamfers, where impact surfaces are oriented in same manner as that of lower surface
GB2473279A (en) * 2009-09-08 2011-03-09 Gm Global Tech Operations Inc Intake system for a charged internal combustion engine comprising a baffle
WO2013093541A1 (en) * 2011-12-22 2013-06-27 Renault Trucks Cylinder head for engine
DE202014007837U1 (en) 2014-11-07 2016-02-11 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Intake passage in a combustion chamber of an internal combustion engine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2846053B1 (en) * 2002-10-16 2007-01-05 Renault Sa CYLINDER HEAD FOR DIRECT INJECTION ENGINE CYLINDER OPERATING IN PARTICULAR ACCORDING TO THE DIESEL CYCLE AND INTERNAL COMBUSTION ENGINE COMPRISING SUCH A CYLINDER HEAD
FR2849676B1 (en) * 2003-01-07 2006-12-01 Renault Sa CYLINDER HEAD FOR DIRECT INJECTION DIESEL ENGINE COMPRISING MEANS FOR IMPROVING THE "SWIRL-PERMEABILITY" COMPROMISE
FR2909717A3 (en) * 2006-12-12 2008-06-13 Renault Sas Heat engine i.e. spark ignition engine, for motor vehicle, has annular element with upstream section, whose lower bearing forms step provoking rotational movement of admission gas along rotation axis of axis perpendicular to valve seat axis
FR2913457B1 (en) * 2007-03-07 2013-09-06 Renault Sas VALVE SEAT FOR INTAKE DUCT, THERMAL MOTOR HEAD, AND METHOD OF MANUFACTURE.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533825C1 (en) * 1995-09-13 1996-11-07 Daimler Benz Ag Cylinder head for internal combustion engine
WO2007104067A2 (en) * 2006-03-14 2007-09-20 Avl List Gmbh Gas exchange channel for an internal combustion engine
WO2007104067A3 (en) * 2006-03-14 2008-01-17 Avl List Gmbh Gas exchange channel for an internal combustion engine
FR2915236A3 (en) * 2007-04-20 2008-10-24 Renault Sas Tumble type variable streamline generating device for e.g. petrol engine of motor vehicle, has seat with projecting part formed of revolution surfaces whose dimensions do not modify discharge of intake flow during high lifting
FR2916798A3 (en) * 2007-06-01 2008-12-05 Renault Sas Anti-reflux valve seat for intake duct of cylinder head of average cylinder capacity diesel engine, has lateral surface with impact surfaces for chamfers, where impact surfaces are oriented in same manner as that of lower surface
GB2473279A (en) * 2009-09-08 2011-03-09 Gm Global Tech Operations Inc Intake system for a charged internal combustion engine comprising a baffle
GB2473279B (en) * 2009-09-08 2015-09-23 Gm Global Tech Operations Inc Internal combustion engine and vehicle comprising the internal combustion engine
WO2013093541A1 (en) * 2011-12-22 2013-06-27 Renault Trucks Cylinder head for engine
DE202014007837U1 (en) 2014-11-07 2016-02-11 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Intake passage in a combustion chamber of an internal combustion engine

Also Published As

Publication number Publication date
FR2707340A1 (en) 1995-01-13

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