FR2707340A1 - Ring forming a valve seat for a mixture intake valve of an internal combustion engine - Google Patents

Ring forming a valve seat for a mixture intake valve of an internal combustion engine Download PDF

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Publication number
FR2707340A1
FR2707340A1 FR9407470A FR9407470A FR2707340A1 FR 2707340 A1 FR2707340 A1 FR 2707340A1 FR 9407470 A FR9407470 A FR 9407470A FR 9407470 A FR9407470 A FR 9407470A FR 2707340 A1 FR2707340 A1 FR 2707340A1
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FR
France
Prior art keywords
valve
valve seat
intake valve
ring forming
internal combustion
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Withdrawn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
FR9407470A
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French (fr)
Inventor
Manz Peter-Wolfgang
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
Publication of FR2707340A1 publication Critical patent/FR2707340A1/en
Withdrawn legal-status Critical Current

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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

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

Abstract

The invention relates to a ring forming a valve seat for a mixture intake valve of an internal combustion engine. In order to eliminate the stream (current) in the form of a boundary layer (wall film) in an intake duct (1) using simple but effective measures, the ring forming the valve seat (6) for the intake valve (2) includes an annular peripheral narrowed part (8) which decreases the passage cross section in the shape of a funnel and which forms an interrupting edge (9). The said narrow part (8) is designed so that the liquid fuel entrained by the flow from the interruption edge (9) reaches the rear side (3) of the valve head (4) of the intake valve (2), from where it is displaced by the flow towards the limit of the valve head (4) which then acts as an interruption edge.

Description

L'invention concerne un anneau formant siège de soupape pour une soupape d'admission de mélange d'un moteur à combustion interne, c'est-à-dire d'un moteur dans lequel la formation du mélange s'effectue dans un carburateur ou par injection de carburant dans le tuyau d'aspiration ou dans le canal d'admission. The invention relates to a valve seat ring for a mixture inlet valve of an internal combustion engine, i.e. of an engine in which the mixture is formed in a carburetor or by injecting fuel into the suction pipe or into the intake channel.

Dans des moteurs à combustion interne de ce type, il existe un risque connu de dépôt de carburant, en particulier sur les parois relativement froides du tuyau d'aspiration et du canal d'admission. Cette formation d'un film sur les parois a une influence préjudiciable sur la formation d'un mélange air-carburant homogène et donc sur le rendement et la composition des gaz dtéchappement du moteur. In internal combustion engines of this type, there is a known risk of fuel deposition, in particular on the relatively cold walls of the suction pipe and the intake channel. This formation of a film on the walls has a detrimental influence on the formation of a homogeneous air-fuel mixture and therefore on the efficiency and composition of the engine exhaust gases.

Pour éliminer ce film de paroi, il existe, dans la littérature des brevets, un grand nombre de propositions - dont on ne citera ici que la DE-OS 31 51 683, F02M 29/06 -, qui ont en commun l'emploi d'une pièce rapportée en forme d'entonnoir dont le diamètre de passage diminue dans le sens d'écoulement. On entend ainsi retenir le film de paroi, qui se déplace sous l'influence du courant de mélange, et également le pulvériser sous l'action du courant de mélange. To eliminate this wall film, there are a large number of proposals in the patent literature - of which only DE-OS 31 51 683, F02M 29/06 will be cited here - which have in common the use of '' a funnel-shaped insert whose passage diameter decreases in the direction of flow. It is thus intended to retain the wall film, which moves under the influence of the mixing current, and also to pulverize it under the action of the mixing current.

Les dispositifs connus de ce type ont pour inconvénient que, s'ils retiennent effectivement le film de paroi formé devant eux et pulvérisent le carburant retenu, en revanche ils ne peuvent pas empêcher un nouveau dépôt de carburant dans des zones adjacentes du tuyau d'aspiration ou du canal d'admission, c'est-à-dire la formation d'un nouveau film de paroi. Known devices of this type have the disadvantage that, if they effectively retain the wall film formed in front of them and spray the retained fuel, on the other hand they cannot prevent a new deposit of fuel in adjacent areas of the suction pipe. or the intake channel, i.e. the formation of a new wall film.

L'invention a donc pour but de fournir, avec des moyens simples, une solution efficace au problème de la formation d'un film de paroi. The invention therefore aims to provide, with simple means, an effective solution to the problem of the formation of a wall film.

Selon l'invention, ce but est atteint au moyen d'un anneau formant siège de soupape pour une soupape d'admission de mélange d'un moteur à combustion interne, l'anneau formant siège de soupape comportant une partie rétrécie périphérique annulaire qui diminue sa section de passage en forme d'entonnoir, qui forme un rebord d'interruption et qui présente une conception telle que le carburant formant le film de paroi est amené au côté arrière de la soupape d'admission ouverte
Suivant des dispositions préférées, éventuellement combinées
- en coupe transversale, la partie rétrécie forme un triangle au moins sensiblement rectangle dont l'hypoténuse tournée vers le courant est orientée en direction du côté arrière de la soupape d'admission
- la partie rétrécie est disposée, sur l'anneau formant siège de soupape, à l'extrémité située sur le côté d'entrée.According to the invention, this object is achieved by means of a ring forming a valve seat for a mixture inlet valve of an internal combustion engine, the ring forming a valve seat comprising an annular peripheral narrowed portion which decreases its funnel-shaped passage section, which forms an interrupting rim and which has a design such that the fuel forming the wall film is supplied to the rear side of the open intake valve
According to preferred arrangements, possibly combined
- in cross section, the narrowed part forms a triangle at least substantially rectangle whose hypotenuse turned towards the current is oriented towards the rear side of the intake valve
- the narrowed part is arranged, on the ring forming the valve seat, at the end situated on the inlet side.

Certes, l'invention repose elle aussi sur une diminution en entonnoir de la section de passage, avec formation d'un rebord d'interruption destiné au carburant liquide, mais, en raison de son intégration dans l'anneau formant siège de soupape, ce rebord d'interruption se trouve à proximité immédiate de la soupape d'admission. Admittedly, the invention is also based on a reduction in the funnel of the passage section, with the formation of an interrupting rim intended for liquid fuel, but, because of its integration in the ring forming the valve seat, this interruption edge is in the immediate vicinity of the intake valve.

Conjointement avec une orientation correspondante de la paroi de la partie rétrécie tournée vers le courant, il est ainsi possible d'amener, sous l'action du courant, le carburant parvenant à cet endroit au côté arrière de la soupape d'admission dont la température est relativement élevée à cause de la proximité de la chambre de combustion et qui comporte d'origine une délimitation relativement nette servant de rebord d'interruption.Together with a corresponding orientation of the wall of the narrowed part facing the current, it is thus possible to bring, under the action of the current, the fuel arriving at this location at the rear side of the intake valve whose temperature is relatively high because of the proximity of the combustion chamber and which originally has a relatively clear delimitation serving as an interruption flange.

L'invention offre également un avantage en fabrication, à savoir que la partie rétrécie périphérique définie peut être venue de moulage lors de la fabrication de l'anneau formant siège de soupape, ce qui évite de prévoir des pièces rapportées supplémentaires pour former le rebord d'interruption ou de réaliser des formes compliquées dans le canal d'admission concerné. The invention also offers an advantage in manufacturing, namely that the defined peripheral narrowed part may have come from molding during the manufacture of the ring forming the valve seat, which avoids providing additional inserts to form the flange d 'interrupting or performing complicated shapes in the relevant intake channel.

Un exemple de réalisation de l'invention sera exposé ci-après en référence au dessin sur lequel
la figure unique représente une coupe verticale de la culasse d'un moteur à combustion interne dans la zone d'un canal d'admission.An exemplary embodiment of the invention will be explained below with reference to the drawing on which
the single figure shows a vertical section of the cylinder head of an internal combustion engine in the area of an intake channel.

Au canal d'admission 1 est associée la soupape d'admission 2 qui est conçue de manière classique sous la forme d'une soupape à course verticale commandée par came et qui, sur la figure unique, est représentée en position ouverte. En position fermée, le côté arrière 3 de la tête de soupape 4 de la soupape d'admission 2 repose de manière étanche contre la surface de siège 5 de l'anneau formant siège de soupape 6 qui est logé dans un évidement correspondant ménagé à l'extrémité du canal d'admission 1 et qui y est fixé. With the intake channel 1 is associated the intake valve 2 which is conventionally designed in the form of a vertical stroke valve controlled by cam and which, in the single figure, is shown in the open position. In the closed position, the rear side 3 of the valve head 4 of the intake valve 2 seals against the seat surface 5 of the valve seat ring 6 which is housed in a corresponding recess provided in the end of the inlet channel 1 and attached thereto.

A titre d'exemple, on ajoute, au moyen d'une soupape d'injection de carburant connue mais non représentée, du carburant à l'air de combustion qui s'écoule dans le canal d'admission 1 afin de former un mélange air-carburant. For example, by means of a known but not shown fuel injection valve, fuel is added to the combustion air which flows in the intake channel 1 in order to form an air mixture. -fuel.

Lorsque le mélange rencontre la paroi de délimitation relativement froide du canal d'admission 1, il existe un risque pour que du carburant se dépose sous forme liquide en formant un film de paroi 7, ce qui est préjudiciable à la formation du mélange. Pour éliminer ce film de paroi qui se déplace en direction de la tête de soupape 4 sous l'influence du courant régnant dans le canal d'admission 1, l'anneau formant siège de soupape 6 forme, par l'intermédiaire de la partie rétrécie périphérique 8, le rebord d'interruption 9, de sorte que le carburant liquide provenant du film de paroi 7 est entraîné par le courant dans le sens des flèches. La partie rétrécie 8 constitue une diminution en entonnoir de la section de passage car elle présente, en coupe transversale, la forme d'un triangle rectangle dont l'hypoténuse 10 est tournée vers le courant. En outre, cette hypoténuse 10 est orientée de façon que le carburant liquide provenant du rebord d'interruption 9 parvienne au côté arrière 3 de la soupape d'admission 2, d'où il est amené par le courant, là encore dans le sens des flèches qui y sont indiquées, jusqu'au bord de la tête de soupape 4 formant alors un rebord d'interruption efficace. De là, le carburant entraîné parvient directement dans la chambre de combustion chaude où il contribue rapidement à la formation du mélange.When the mixture meets the relatively cold boundary wall of the intake channel 1, there is a risk that fuel is deposited in liquid form by forming a wall film 7, which is detrimental to the formation of the mixture. To eliminate this film of wall which moves in the direction of the valve head 4 under the influence of the current prevailing in the intake channel 1, the ring forming the valve seat 6 forms, via the narrowed part peripheral 8, the interrupting rim 9, so that the liquid fuel coming from the wall film 7 is entrained by the current in the direction of the arrows. The narrowed part 8 constitutes a reduction in the funnel of the passage section because it has, in cross section, the shape of a right triangle whose hypotenuse 10 is turned towards the current. In addition, this hypotenuse 10 is oriented so that the liquid fuel coming from the interrupting flange 9 reaches the rear side 3 of the intake valve 2, from where it is brought by the current, again in the direction of arrows indicated therein, up to the edge of the valve head 4 then forming an effective interruption flange. From there, the entrained fuel goes directly into the hot combustion chamber where it quickly contributes to the formation of the mixture.

Dans l'exemple représenté, la partie rétrécie annulaire 8 se trouve, sur l'anneau formant siège de soupape 6, à l'extrémité située sur le côté d'entrée - extrémité opposée au siège de soupape 5 -, ce qui garantit une fabrication très simple de la partie rétrécie 8.  In the example shown, the annular narrowed part 8 is located, on the ring forming the valve seat 6, at the end situated on the inlet side - end opposite to the valve seat 5 -, which guarantees manufacturing very simple of the narrowed part 8.

Claims (3)

REVENDICATIONS 1. Anneau formant siège de soupape pour une soupape d'admission de mélange d'un moteur à combustion interne, caractérisé en ce que l'anneau formant siège de soupape (6) comporte une partie rétrécie périphérique annulaire (8) qui diminue sa section de passage en forme d'entonnoir, qui forme un rebord d'interruption (9) et qui présente une conception telle que le carburant (7) formant le film de paroi est amené au côté arrière (3) de la soupape d'admission ouverte (2). 1. Valve seat ring for a mixture intake valve of an internal combustion engine, characterized in that the valve seat ring (6) has an annular peripheral narrowed portion (8) which decreases its section funnel-shaped passageway which forms an interrupting rim (9) and which has a design such that the fuel (7) forming the wall film is supplied to the rear side (3) of the open intake valve (2). 2. Anneau formant siège de soupape selon la revendication 1, caractérisé en ce qu'en coupe transversale, la partie rétrécie (8) forme un triangle au moins sensiblement rectangle dont l'hypoténuse (10) tournée vers le courant est orientée en direction du côté arrière (3) de la soupape d'admission (2). 2. Ring forming a valve seat according to claim 1, characterized in that in cross section, the narrowed part (8) forms an at least substantially rectangle triangle whose hypotenuse (10) facing the current is oriented towards the rear side (3) of the intake valve (2). 3. Anneau formant siège de soupape selon la revendication 1 ou 2, caractérisé en ce que la partie rétrécie (8) est disposée, sur l'anneau formant siège de soupape (6), à l'extrémité située sur le côté d'entrée.  3. valve seat ring according to claim 1 or 2, characterized in that the narrowed portion (8) is disposed, on the valve seat ring (6), at the end located on the inlet side .
FR9407470A 1993-07-08 1994-06-17 Ring forming a valve seat for a mixture intake valve of an internal combustion engine Withdrawn FR2707340A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4322777 1993-07-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1411222A1 (en) * 2002-10-16 2004-04-21 Renault s.a.s. Head cylinder for direct injection combustion engine and engine with this head cylinder
FR2849676A1 (en) * 2003-01-07 2004-07-09 Renault Sa Cylinder head for diesel injection motor, has two pipes with valves to send air in cylinder following direction tangential with respect to lateral side of cylinder
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
EP1967705A1 (en) * 2007-03-07 2008-09-10 Renault SAS Valve seat for intake duct, heat engine cylinder head and manufacturing method

Families Citing this family (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
DE112007000294A5 (en) * 2006-03-14 2009-02-26 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
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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1411222A1 (en) * 2002-10-16 2004-04-21 Renault s.a.s. Head cylinder for direct injection combustion engine and engine with this head cylinder
FR2846053A1 (en) * 2002-10-16 2004-04-23 Renault Sa CYLINDER HEAD FOR A DIRECT INJECTION ENGINE, PARTICULARLY OPERATING ACCORDING TO THE DIESEL CYCLE, AND INTERNAL COMBUSTION ENGINE COMPRISING SUCH A HEAD
FR2849676A1 (en) * 2003-01-07 2004-07-09 Renault Sa Cylinder head for diesel injection motor, has two pipes with valves to send air in cylinder following direction tangential with respect to lateral side of cylinder
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
EP1967705A1 (en) * 2007-03-07 2008-09-10 Renault SAS Valve seat for intake duct, heat engine cylinder head and manufacturing method
FR2913457A1 (en) * 2007-03-07 2008-09-12 Renault Sas VALVE SEAT FOR INTAKE DUCT, THERMAL MOTOR HEAD, AND METHOD OF MANUFACTURE.

Also Published As

Publication number Publication date
DE4422328A1 (en) 1995-01-12

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