EP1036265B1 - Throttle valve body with self-centring throttle valve - Google Patents

Throttle valve body with self-centring throttle valve Download PDF

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Publication number
EP1036265B1
EP1036265B1 EP98956976A EP98956976A EP1036265B1 EP 1036265 B1 EP1036265 B1 EP 1036265B1 EP 98956976 A EP98956976 A EP 98956976A EP 98956976 A EP98956976 A EP 98956976A EP 1036265 B1 EP1036265 B1 EP 1036265B1
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EP
European Patent Office
Prior art keywords
throttle valve
conduit
reliefs
downstream
valve body
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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.)
Expired - Lifetime
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EP98956976A
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German (de)
French (fr)
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EP1036265A1 (en
Inventor
Jean-Pierre Joigneau
Claude Pajard
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Marelli France SAS
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Magneti Marelli France SAS
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Publication of EP1036265A1 publication Critical patent/EP1036265A1/en
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    • 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
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing

Definitions

  • the present invention aims to facilitate the centering of the butterfly inside the duct and this, by simple, effective and inexpensive means.
  • Another object of the present invention is to ensure, even in the event of a breakdown, a minimum safety air flow in the duct, downstream of the butterfly.
  • the throttle body of the aforementioned type is essentially characterized in that the self-centering means include first reliefs in protruding towards the inside of the duct, and the edge of the butterfly includes second reliefs projecting towards the wall of the duct, the first and second reliefs being substantially complementary in shape.
  • FIG. 1 represents a butterfly body 1 which has a housing 2 in which is formed a conduit intake 3, longitudinal axis X-X. Box 2 is manufactured by molding in a synthetic material such as thermoplastic material and obtained in its final form without additional machining or deburring.
  • a pivot 5 of axis Y-Y, perpendicular to the longitudinal axis X-X of the conduit 3, and intersecting this axis X-X, is mounted swirling, and constitutes a median axis of rotation for a butterfly 6 in the form of disc of constant thickness, approximately shaped circular and which will be further described with regard to Figures 2 to 4.
  • the median axis of rotation 5 is mounted swirling at a central section 7 located substantially at mid-height of conduit 3 and dividing this conduit into a section upstream 8, and in a downstream section 9.
  • the butterfly 6 shown in Figures 2 to 4 is advantageously made of synthetic material such as thermoplastic material. It consists of a disc 10 of substantially circular or slightly elliptical in shape, of generally constant thickness, so that it has a section 11 of constant height over the entire periphery of the disc.
  • the butterfly 6 pivots around its median axis of rotation 5 in the direction of arrow F shown in Figure 3, between a minimum opening position such that that shown in Figure 2 and an open position maximum for which the butterfly plane is oriented substantially parallel to the axis X-X of the conduit air intake 3.
  • This butterfly can thus be considered as consisting of two half-discs 12 and 13, the half-disc 12 turning towards the upstream part 8 of the conduit 3 and the downstream half-disc 13 rotating towards the downstream part 9 of the conduit 3.
  • the wall 4 of this conduit comprises means self-centering 15 which cooperate with the unit 11 of the butterfly 6.
  • These self-centering means 15 include first reliefs 16 projecting from the wall 4 of the conduit 3 and directed towards the interior of this leads. These first reliefs 16 cooperate, in the position minimum opening of the butterfly, with second reliefs 17 projecting from edge 11 of the butterfly and directed towards the wall 4 of the conduit 3. These first 16 and second 17 reliefs are substantially in shape complementary in order to center the butterfly by corner.
  • the first reliefs 16 and the second reliefs 17 are substantially convergent in shape and the first reliefs 16 extend in a plane substantially perpendicular to the longitudinal axis X-X of conduit 3, at level of minimum throttle opening position 6.
  • the first reliefs 16 are conical and the second reliefs 17 are of frustoconical shape.
  • the conical shape of the first reliefs 16 is of slope less than the slope of the form frustoconical of the second reliefs 17. These slopes are respectively of the order of 3 and 5 degrees.
  • the first reliefs 16 are located on two spherical caps 20 and 21 which are inscribed in a sphere whose center imaginary is located at the intersection of the longitudinal axis X-X of the duct 3 and the Y-Y axis of rotation of the butterfly 6. These two spherical caps 20 and 21 came in one piece with the wall 4 of the conduit 3 and projecting inside this conduit 3.
  • the spherical cap 20 extends over the upstream part 8 of duct 3, from the minimum open position of the butterfly 6, while the spherical cap 21 extends on the downstream part 9 of the conduit 3, from the position minimum opening of said butterfly 6.
  • the first reliefs 16 are located respectively in the lower part and in the upper part of the spherical caps 20 and 21.
  • Each of these spherical caps 20 and 21 is symmetrical about a plane perpendicular to the axis median Y-Y of rotation of the butterfly 6 and passing through the axis longitudinal X-X of the duct 3.
  • the spherical cap 20 has two recesses 23 and the spherical cap 21 has two recesses 24.
  • the recesses 23 extend in the lower part of the cap spherical 20 from the median axis Y-Y while the recesses 24 of the spherical cap 21 extend in upper part of this cap, from the median axis of rotation Y-Y.
  • Each of the spherical caps 20 and 21 thus has respectively a central part 25, 26 and two arms 27, 28.
  • the spherical cap 20 has an upstream edge 29 and the spherical cap 21 has a downstream edge 30, the shape is adapted to the amount of air to be admitted in the downstream section 9 of the conduit 3 as a function of the angle butterfly opening 6.
  • the upstream part 8 communicates with the downstream part 9 by the recesses 23 and 24 formed in the spherical caps 20 and 21.
  • This position is the position in butterfly backup mode which corresponds to point I of the graph of figure 5.
  • the quantity of air admitted into the downstream section 9 is weak.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

La présente invention est relative à un corps papillon pour dispositif d'injection de combustible pour moteur à combustion interne, comportant :

  • un boítier dans lequel est ménagé un conduit d'admission d'air qui comprend une paroi intérieure, et
  • un papillon en forme de disque sensiblement circulaire ou faiblement elliptique, monté sur un axe médian de rotation, transversal au conduit, divisant ce conduit en une partie amont et une partie aval, et déplaçable entre une position d'ouverture minimum et une position d'ouverture maximum pour laquelle le plan du papillon est orienté sensiblement parallèlement à l'axe du conduit d'admission, la partie du papillon qui tourne vers la partie amont du conduit, respectivement vers la partie aval, à partir de la position d'ouverture minimum, ayant une forme de demi-disque plat possédant une tranche de faible épaisseur par rapport à sa surface, la paroi du conduit comprenant des moyens d'auto-centrage du papillon qui coopèrent avec la tranche du papillon.
The present invention relates to a throttle body for a fuel injection device for an internal combustion engine, comprising:
  • a housing in which an air intake duct is formed which includes an interior wall, and
  • a disc-shaped butterfly substantially circular or slightly elliptical, mounted on a median axis of rotation, transverse to the duct, dividing this duct into an upstream part and a downstream part, and movable between a minimum open position and a position maximum opening for which the throttle plane is oriented substantially parallel to the axis of the intake duct, the part of the throttle which turns towards the upstream part of the duct, respectively towards the downstream part, from the minimum opening position , having the shape of a flat half-disc having a thin section relative to its surface, the wall of the duct comprising means for self-centering of the butterfly which cooperate with the section of the butterfly.

On connaít de nombreux corps papillon dont le boítier possède un conduit en forme de cylindre à base circulaire dont la zone dans laquelle pivote le papillon comprend une surface évolutive (voir US-A-4 860 706).We know many butterfly bodies including housing has a cylinder-shaped conduit based circular whose area in which the butterfly pivots includes an evolving surface (see US-A-4,860,706).

Toutefois, ces corps papillon connus de l'homme du métier sont difficiles à réaliser dans la mesure où le papillon est difficile à centrer à l'intérieur du conduit.However, these butterfly bodies known to man of the trades are difficult to achieve since the butterfly is difficult to center inside the duct.

De plus, afin d'obtenir un agrément de conduite d'un véhicule automobile muni d'un moteur à combustion interne possédant de tels corps papillon, il est nécessaire d'utiliser des moyens de commande de l'angle d'ouverture du papillon à l'intérieur du conduit. Ces moyens de commande présentent le risque de tomber en panne. Dans un tel cas, le fonctionnement du moteur doit être sauvegardé. Pour cela, il est nécessaire de forcer l'ouverture du papillon afin d'assurer un débit d'air minimum, dans le conduit, en aval du papillon.In addition, in order to obtain a driving license from a motor vehicle with an internal combustion engine having such butterfly bodies, it is necessary to use means for controlling the opening angle of the butterfly inside the duct. These control means present the risk of breaking down. In such a case, the engine operation must be saved. For that, he is necessary to force the opening of the butterfly so to ensure a minimum air flow, in the duct, downstream of the butterfly.

De tels corps papillon possèdent des formes complexes et sont coûteux à réaliser.Such butterfly bodies have shapes complex and costly to produce.

La présente invention a pour but de faciliter le centrage du papillon à l'intérieur du conduit et ce, par des moyens simples, efficaces et peu coûteux.The present invention aims to facilitate the centering of the butterfly inside the duct and this, by simple, effective and inexpensive means.

Un autre but de la présente invention est d'assurer, même en cas de panne, un débit d'air minimum de sécurité dans le conduit, en aval du papillon.Another object of the present invention is to ensure, even in the event of a breakdown, a minimum safety air flow in the duct, downstream of the butterfly.

A cet effet, selon l'invention, le corps papillon du type précité est essentiellement caractérisé en ce que les moyens d'auto-centrage comprennent des premiers reliefs en saillie vers l'intérieur du conduit, et la tranche du papillon comprend des deuxièmes reliefs en saillie vers la paroi du conduit, les premiers et deuxièmes reliefs étant sensiblement de forme complémentaire.To this end, according to the invention, the throttle body of the aforementioned type is essentially characterized in that the self-centering means include first reliefs in protruding towards the inside of the duct, and the edge of the butterfly includes second reliefs projecting towards the wall of the duct, the first and second reliefs being substantially complementary in shape.

Le corps papillon selon l'invention peut éventuellement comporter en outre une ou plusieurs des caractéristiques suivantes :

  • les premiers et deuxièmes reliefs sont respectivement de forme convergente et les premiers reliefs s'étendent sensiblement transversalement au conduit ;
  • les premiers reliefs sont de forme conique et les deuxièmes reliefs sont de forme tronconique ;
  • la forme conique des premiers reliefs étant de pente inférieure à celle de la forme tronconique des deuxièmes reliefs ;
  • la paroi du conduit d'admission présente, du côté de la partie du disque plat tournant vers la partie amont et en amont, respectivement du côté de la partie du disque tournant vers la partie aval et en aval, de la position d'ouverture minimale, une première et une deuxième portions en forme de calottes sphériques elles-mêmes inscrites dans une sphère dont le centre est situé à l'intersection de l'axe longitudinal du conduit et de l'axe médian de rotation du papillon, et en ce que les moyens d'auto-centrage sont situés sur lesdites calottes sphériques ;
  • chaque calotte sphérique comprend au moins un évidemment s'étendant depuis l'axe médian de rotation du papillon de sorte que lorsque le papillon pivote depuis sa position d'ouverture minimale vers sa position d'ouverture maximale, les parties amont et aval du conduit sont successivement en communication fluidique faible, minimale, puis totale ;
  • chaque calotte sphérique est symétrique par rapport à un plan perpendiculaire à l'axe médian de rotation du papillon et passant par l'axe longitudinal du conduit ; et
  • chaque calotte sphérique comprend une partie centrale à partir de laquelle s'étendent deux bras latéraux, les deux bras latéraux de la calotte destinée à être en regard de la partie du papillon tournant vers la partie amont, respectivement de la partie du papillon tournant vers la partie aval, étant situés en amont, respectivement en aval, de la position d'ouverture minimale du papillon.
The butterfly body according to the invention may optionally further include one or more of the following characteristics:
  • the first and second reliefs are respectively of convergent shape and the first reliefs extend substantially transversely to the conduit;
  • the first reliefs are conical and the second reliefs are frustoconical;
  • the conical shape of the first reliefs having a slope less than that of the frustoconical shape of the second reliefs;
  • the wall of the intake duct has, on the side of the portion of the flat disc rotating towards the upstream and upstream portion, respectively on the side of the portion of the disc rotating towards the downstream and downstream portion, of the minimum open position , a first and a second portion in the form of spherical caps themselves inscribed in a sphere whose center is located at the intersection of the longitudinal axis of the duct and the median axis of rotation of the butterfly, and in that the self-centering means are located on said spherical caps;
  • each spherical cap comprises at least one recess extending from the median axis of rotation of the butterfly so that when the butterfly pivots from its minimum open position to its maximum open position, the upstream and downstream parts of the duct are successively in weak, minimal, then total fluid communication;
  • each spherical cap is symmetrical with respect to a plane perpendicular to the median axis of rotation of the butterfly and passing through the longitudinal axis of the duct; and
  • each spherical cap comprises a central part from which extend two lateral arms, the two lateral arms of the cap intended to be opposite the part of the butterfly rotating towards the upstream part, respectively of the part of the butterfly rotating towards the downstream part, being located upstream, respectively downstream, of the minimum opening position of the butterfly.

Un exemple de réalisation de l'invention va maintenant être décrit en regard des dessins annexés, sur lesquels :

  • la figure 1 est une vue en coupe longitudinale d'un corps papillon selon la présente invention, le papillon ayant été retiré pour des raisons de clarté ;
  • la figure 2 est une vue identique à celle de la figure 1, le papillon étant maintenant représenté en position minimale d'ouverture ;
  • la figure 3 est une vue identique à celle de la figure 1, le papillon étant maintenant représenté dans une position intermédiaire d'ouverture ;
  • la figure 4 est une vue agrandie du détail A de la figure 2 représentant le papillon en butée contre la surface du conduit ; et
  • la figure 5 est un graphe représentant la quantité d'air admis dans le conduit, en aval du papillon en fonction de l'angle d'ouverture dudit papillon.
An embodiment of the invention will now be described with reference to the accompanying drawings, in which:
  • Figure 1 is a longitudinal sectional view of a butterfly body according to the present invention, the butterfly having been removed for reasons of clarity;
  • Figure 2 is a view identical to that of Figure 1, the butterfly is now shown in the minimum open position;
  • Figure 3 is a view identical to that of Figure 1, the butterfly being now shown in an intermediate open position;
  • Figure 4 is an enlarged view of detail A of Figure 2 showing the butterfly abutting against the surface of the conduit; and
  • Figure 5 is a graph showing the amount of air admitted into the duct, downstream of the butterfly as a function of the opening angle of said butterfly.

La figure 1 représente un corps papillon 1 qui comporte un boítier 2 dans lequel est ménagé un conduit d'admission 3, d'axe longitudinal X-X. Le boítier 2 est fabriqué par moulage en un matériau de synthèse tel qu'un matériau thermoplastique et obtenu à sa forme définitive sans usinage ni ébavurage complémentaires.FIG. 1 represents a butterfly body 1 which has a housing 2 in which is formed a conduit intake 3, longitudinal axis X-X. Box 2 is manufactured by molding in a synthetic material such as thermoplastic material and obtained in its final form without additional machining or deburring.

Dans le boítier 2, un pivot 5, d'axe Y-Y, perpendiculaire à l'axe longitudinal X-X du conduit 3, et coupant cet axe X-X, est monté tourbillonnant, et constitue un axe médian de rotation pour un papillon 6 en forme de disque d'épaisseur constante, de forme approximativement circulaire et qui sera davantage décrit en regard des figures 2 à 4.In the case 2, a pivot 5, of axis Y-Y, perpendicular to the longitudinal axis X-X of the conduit 3, and intersecting this axis X-X, is mounted swirling, and constitutes a median axis of rotation for a butterfly 6 in the form of disc of constant thickness, approximately shaped circular and which will be further described with regard to Figures 2 to 4.

L'axe médian de rotation 5 est monté tourbillonnant au niveau d'un tronçon central 7 situé sensiblement à mi-hauteur du conduit 3 et divisant ce conduit en un tronçon amont 8, et en un tronçon aval 9. The median axis of rotation 5 is mounted swirling at a central section 7 located substantially at mid-height of conduit 3 and dividing this conduit into a section upstream 8, and in a downstream section 9.

Le papillon 6 représenté aux figures 2 à 4, est avantageusement réalisé en matériau de synthèse tel qu'un matériau thermoplastique. Il est constitué d'un disque 10 de forme sensiblement circulaire ou faiblement elliptique, d'épaisseur généralement constante, de sorte qu'il possède une tranche 11 de hauteur constante sur toute la périphérie du disque.The butterfly 6 shown in Figures 2 to 4, is advantageously made of synthetic material such as thermoplastic material. It consists of a disc 10 of substantially circular or slightly elliptical in shape, of generally constant thickness, so that it has a section 11 of constant height over the entire periphery of the disc.

Le papillon 6 pivote autour de son axe médian de rotation 5 selon le sens de la flèche F représentée à la figure 3, entre une position d'ouverture minimum telle que celle représentée à la figure 2 et une position d'ouverture maximum pour laquelle le plan du papillon est orienté sensiblement parallèlement à l'axe X-X du conduit d'admission d'air 3. Ce papillon peut être ainsi considéré comme constitué de deux demi-disques 12 et 13, le demi-disque 12 tournant vers la partie amont 8 du conduit 3 et le demi-disque aval 13 tournant vers la partie aval 9 du conduit 3.The butterfly 6 pivots around its median axis of rotation 5 in the direction of arrow F shown in Figure 3, between a minimum opening position such that that shown in Figure 2 and an open position maximum for which the butterfly plane is oriented substantially parallel to the axis X-X of the conduit air intake 3. This butterfly can thus be considered as consisting of two half-discs 12 and 13, the half-disc 12 turning towards the upstream part 8 of the conduit 3 and the downstream half-disc 13 rotating towards the downstream part 9 of the conduit 3.

Afin d'assurer le centrage du papillon 6 dans le conduit 3, la paroi 4 de ce conduit comprend des moyens d'auto-centrage 15 qui coopèrent avec la tranche 11 du papillon 6. Ces moyens d'auto-centrage 15 comprennent des premiers reliefs 16 placés en saillie sur la paroi 4 du conduit 3 et dirigés en direction de l'intérieur de ce conduit. Ces premiers reliefs 16 coopèrent, dans la position d'ouverture minimale du papillon, avec des deuxièmes reliefs 17 situés en saillie sur la tranche 11 du papillon et dirigés vers la paroi 4 du conduit 3. Ces premiers 16 et deuxièmes 17 reliefs sont sensiblement de forme complémentaire afin de centrer le papillon par effet de coin. In order to ensure the centering of the butterfly 6 in the conduit 3, the wall 4 of this conduit comprises means self-centering 15 which cooperate with the unit 11 of the butterfly 6. These self-centering means 15 include first reliefs 16 projecting from the wall 4 of the conduit 3 and directed towards the interior of this leads. These first reliefs 16 cooperate, in the position minimum opening of the butterfly, with second reliefs 17 projecting from edge 11 of the butterfly and directed towards the wall 4 of the conduit 3. These first 16 and second 17 reliefs are substantially in shape complementary in order to center the butterfly by corner.

Les premiers reliefs 16 et les deuxièmes reliefs 17 sont sensiblement de forme convergente et les premiers reliefs 16 s'étendent dans un plan sensiblement perpendiculaire à l'axe longitudinal X-X du conduit 3, au niveau de la position d'ouverture minimale du papillon 6.The first reliefs 16 and the second reliefs 17 are substantially convergent in shape and the first reliefs 16 extend in a plane substantially perpendicular to the longitudinal axis X-X of conduit 3, at level of minimum throttle opening position 6.

Plus précisément, et comme le montre la figure 4, les premiers reliefs 16 sont de forme conique et les deuxièmes reliefs 17 sont de forme tronconique. Afin de s'assurer l'effet de coin, la forme conique des premiers reliefs 16 est de pente inférieure à la pente de la forme tronconique des deuxièmes reliefs 17. Ces pentes sont respectivement de l'ordre de 3 et 5 degrés.More specifically, and as shown in Figure 4, the first reliefs 16 are conical and the second reliefs 17 are of frustoconical shape. In order to ensuring the wedge effect, the conical shape of the first reliefs 16 is of slope less than the slope of the form frustoconical of the second reliefs 17. These slopes are respectively of the order of 3 and 5 degrees.

De plus, comme le montrent les figures 1 à 4, les premiers reliefs 16 sont situés sur deux calottes sphériques 20 et 21 qui sont inscrites dans une sphère dont le centre imaginaire est situé à l'intersection de l'axe longitudinal X-X du conduit 3 et de l'axe Y-Y de rotation du papillon 6. Ces deux calottes sphériques 20 et 21 sont venues de matière avec la paroi 4 du conduit 3 et en saillie à l'intérieur de ce conduit 3.In addition, as shown in Figures 1 to 4, the first reliefs 16 are located on two spherical caps 20 and 21 which are inscribed in a sphere whose center imaginary is located at the intersection of the longitudinal axis X-X of the duct 3 and the Y-Y axis of rotation of the butterfly 6. These two spherical caps 20 and 21 came in one piece with the wall 4 of the conduit 3 and projecting inside this conduit 3.

La calotte sphérique 20 s'étend sur la partie amont 8 du conduit 3, à partir de la position d'ouverture minimale du papillon 6, tandis que la calotte sphérique 21 s'étend sur la partie aval 9 du conduit 3, à partir de la position d'ouverture minimale dudit papillon 6. Ainsi, les premiers reliefs 16 sont situés respectivement en partie inférieure et en partie supérieure des calottes sphériques 20 et 21.The spherical cap 20 extends over the upstream part 8 of duct 3, from the minimum open position of the butterfly 6, while the spherical cap 21 extends on the downstream part 9 of the conduit 3, from the position minimum opening of said butterfly 6. Thus, the first reliefs 16 are located respectively in the lower part and in the upper part of the spherical caps 20 and 21.

Chacune de ces calottes sphériques 20 et 21 est symétrique par rapport à un plan perpendiculaire à l'axe médian Y-Y de rotation du papillon 6 et passant par l'axe longitudinal X-X du conduit 3. Each of these spherical caps 20 and 21 is symmetrical about a plane perpendicular to the axis median Y-Y of rotation of the butterfly 6 and passing through the axis longitudinal X-X of the duct 3.

Afin de permettre le pivotement du papillon 6, la calotte sphérique 20 possède deux évidements 23 et la calotte sphérique 21 possède deux évidements 24. Les évidements 23 s'étendent en partie inférieure de la calotte sphérique 20 à partir de l'axe médian Y-Y tandis que les évidements 24 de la calotte sphérique 21 s'étendent en partie supérieure de cette calotte, à partir de l'axe médian de rotation Y-Y. Chacune des calottes sphériques 20 et 21 possède ainsi respectivement une partie centrale 25, 26 et deux bras 27, 28.In order to allow the butterfly 6 to pivot, the spherical cap 20 has two recesses 23 and the spherical cap 21 has two recesses 24. The recesses 23 extend in the lower part of the cap spherical 20 from the median axis Y-Y while the recesses 24 of the spherical cap 21 extend in upper part of this cap, from the median axis of rotation Y-Y. Each of the spherical caps 20 and 21 thus has respectively a central part 25, 26 and two arms 27, 28.

La calotte sphérique 20 possède un bord amont 29 et la calotte sphérique 21 possède un bord aval 30 dont la forme est adaptée à la quantité d'air devant être admise dans le tronçon aval 9 du conduit 3 en fonction de l'angle d'ouverture du papillon 6.The spherical cap 20 has an upstream edge 29 and the spherical cap 21 has a downstream edge 30, the shape is adapted to the amount of air to be admitted in the downstream section 9 of the conduit 3 as a function of the angle butterfly opening 6.

On comprend donc que lors du montage du papillon 6 dans le conduit 3, le centrage de ce papillon est facilité par la venue en butée de la tranche du papillon 6 contre la forme conique des premiers reliefs 16 des calottes sphériques 20 et 21. Dans cette position, il suffit de fixer l'axe du papillon de manière précise dans le conduit 3.It is therefore understood that during the mounting of the butterfly 6 in the duct 3, the centering of this butterfly is facilitated by the abutment of the edge of the butterfly 6 against the conical shape of the first reliefs 16 of the caps spherical 20 and 21. In this position, it is enough to fix the throttle axis precisely in the duct 3.

La loi de variation de la quantité d'air admise dans la partie aval 9 du conduit 3 en fonction de l'angle d'ouverture α du papillon 6 est donnée par le graphe de la figure 5.The law of variation of the quantity of air admitted in the downstream part 9 of the conduit 3 as a function of the angle opening α of butterfly 6 is given by the graph of the figure 5.

Lorsque le papillon 6 est dans la position représentée à la figure 2, c'est-à-dire dans sa position d'ouverture minimale, la partie amont 8 communique avec la partie aval 9 par les évidements 23 et 24 ménagés dans les calottes sphériques 20 et 21. Cette position est la position en mode secours du papillon qui correspond au point I du graphe de la figure 5. La quantité d'air admise dans le tronçon aval 9 est faible.When the butterfly 6 is in the position shown in Figure 2, that is to say in its position minimum opening, the upstream part 8 communicates with the downstream part 9 by the recesses 23 and 24 formed in the spherical caps 20 and 21. This position is the position in butterfly backup mode which corresponds to point I of the graph of figure 5. The quantity of air admitted into the downstream section 9 is weak.

Lorsque le papillon 6 s'écarte de quelques degrés de sa position d'ouverture minimale, la quantité d'air admise dans le tronçon aval 9 diminue pour atteindre un palier au segment JK du graphe de la figure 5. Ce palier est atteint lorsque le papillon 6 est situé au niveau des bras 27 et 28, les calottes sphériques 20 et 21.When the butterfly 6 deviates by a few degrees from its minimum open position, the quantity of air admitted in the downstream section 9 decreases to reach a plateau at JK segment of the graph in Figure 5. This level is reached when the butterfly 6 is located at the arms 27 and 28, the spherical caps 20 and 21.

Lorsque l'ouverture du papillon 6 augmente, le papillon 6 tend vers sa position d'ouverture maximale dans laquelle il est parallèle à l'axe X-X du conduit 3, la quantité d'air admise dans le tronçon 9 augmente alors en fonction de la forme des bords 29 et 30, les calottes sphériques 20 et 21. Cette phase correspond au régime d'accélération du moteur.When the opening of the butterfly 6 increases, the throttle 6 tends towards its maximum opening position in which it is parallel to the axis X-X of the conduit 3, the quantity of air admitted into section 9 then increases in depending on the shape of the edges 29 and 30, the caps spherical 20 and 21. This phase corresponds to the regime engine acceleration.

Claims (8)

  1. Throttle valve body for a fuel injection device for an internal combustion engine, comprising:
    a housing (2) in which is provided an air intake conduit (3) having an internal wall (4), and
    a throttle valve (6) in the form of a substantially circular or slightly elliptical disc (10) mounted on a central rotary shaft (5) which extends transversely with respect to the conduit (3), divides the said conduit into an upstream part (8) and a downstream part (9) and is displaceable between a minimum opening position and a maximum opening position for which the plane of the throttle valve is oriented substantially parallel to the axis (X-X) of the intake conduit (3), the part of the throttle valve (6) which turns towards the upstream part (8) of the conduit (3), or respectively towards the downstream part (9), from the minimum opening position having the shape of a flat half-disc (12, 13) with a section (11) of small thickness relative to its surface,
    the wall (4) of the conduit (3) including means (15) for self-centring of the throttle valve (6) which co-operate with the section (11) of the throttle valve (6),
    characterised in that the self-centring means (15) comprise first reliefs (16) which project towards the interior of the conduit (3), and the section (11) of the throttle valve (6) comprises second reliefs (17) which project towards the wall (4) of the conduit (3), the first reliefs (16) and the second reliefs (17) being substantially of complementary shape.
  2. Throttle valve body as claimed in Claim 1, characterised in that the first reliefs (16) and the second reliefs (17) are respectively of convergent shape and the first reliefs (16) extend substantially transversely with respect to the conduit (3).
  3. Throttle valve body as claimed in Claim 2, characterised in that the first reliefs (16) are of conical shape and the second reliefs (17) are in the shape of truncated cones.
  4. Throttle valve body as claimed in Claim 3, characterised in that the conical shape of the first reliefs (16) is of a lesser gradient than that of the truncated cone shape of the second reliefs (17).
  5. Throttle valve body as claimed in any one of Claims 2 to 4, characterised in that, on the side of the part (12) of the flat disc (10) which turns towards the upstream part (8) and upstream, and respectively on the side of the part (13) of the disc (10) which turns towards the downstream part (9) and downstream, from the minimum opening position, the wall (4) of the intake conduit (3) has a first portion (20) and a second portion (21) in the form of spherical segments which are themselves inscribed in a sphere of which the centre is situated at the intersection of the longitudinal axis (X-X) of the conduit and the central axis of rotation (Y-Y) of the throttle valve (6), and in that the self-centring means (15) are situated on the said spherical segments (20, 21).
  6. Throttle valve body as claimed in Claim 5, characterised in that each spherical segment (20, 21) comprises at least one recess (23, 24) extending from the central axis of rotation (Y-Y) of the throttle valve (6) in such a way that when the throttle valve (6) pivots from its minimum opening position towards its maximum opening position the upstream (8) and downstream (8) parts of the conduit (3) are successively in poor, minimal and then total fluid communication.
  7. Throttle valve body as claimed in Claim 6, characterised in that each spherical segment (20, 21) is symmetrical with respect to a plane perpendicular to the central axis of rotation (Y-Y) of the throttle valve (6) and passing through the longitudinal axis (X-X) of the conduit (3).
  8. Throttle valve body as claimed in Claim 7, characterised in that each spherical segment (20, 21) comprises a central part (25, 26) from which two lateral arms (27, 28) extend, the two lateral arms (27, 28) of the segment (20, 21) intended to be facing the part (12) of the throttle valve (6) which turns towards the upstream part (8), and respectively the part (13) of the throttle valve (6) which turns towards the downstream part (9), being situated upstream, and respectively downstream, of the minimum opening position of the throttle valve (6).
EP98956976A 1997-12-01 1998-11-27 Throttle valve body with self-centring throttle valve Expired - Lifetime EP1036265B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9715078 1997-12-01
FR9715078A FR2771777B1 (en) 1997-12-01 1997-12-01 BUTTERFLY BODY TO SELF-CENTERED BUTTERFLY
PCT/FR1998/002557 WO1999028609A1 (en) 1997-12-01 1998-11-27 Throttle valve body with self-centring throttle valve

Publications (2)

Publication Number Publication Date
EP1036265A1 EP1036265A1 (en) 2000-09-20
EP1036265B1 true EP1036265B1 (en) 2002-01-16

Family

ID=9513995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98956976A Expired - Lifetime EP1036265B1 (en) 1997-12-01 1998-11-27 Throttle valve body with self-centring throttle valve

Country Status (6)

Country Link
EP (1) EP1036265B1 (en)
BR (1) BR9814716A (en)
DE (1) DE69803226T2 (en)
ES (1) ES2171313T3 (en)
FR (1) FR2771777B1 (en)
WO (1) WO1999028609A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1096124B1 (en) * 1999-11-01 2006-02-15 Denso Corporation Valve system for intake air controller for internal combustion engine and manufacturing the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1600880A1 (en) * 1951-01-28 1971-09-16 Pierburg Kg A throttle
US4356801A (en) * 1981-02-02 1982-11-02 Chrysler Corporation Throttle body fuel injection
US4860706A (en) * 1987-09-14 1989-08-29 Aisan Kogyo Kabushiki Kaisha Throttle body
FR2650360B1 (en) * 1989-07-28 1991-11-29 Peugeot BUTTERFLY VALVE
JP2863876B2 (en) * 1991-03-01 1999-03-03 愛三工業株式会社 Slottle valve assembly device
JPH05296067A (en) * 1992-04-20 1993-11-09 Aisan Ind Co Ltd Intake control device for internal combustion engine
FR2729729B1 (en) * 1995-01-20 1997-04-04 Magneti Marelli France ELLIPTICALLY SHOCKING BODY, MANUFACTURING METHOD THEREOF AND VALVE, SUCH AS BUTTERFLY BODY, COMPRISING SAME

Also Published As

Publication number Publication date
DE69803226D1 (en) 2002-02-21
BR9814716A (en) 2000-10-03
FR2771777A1 (en) 1999-06-04
FR2771777B1 (en) 2000-01-28
EP1036265A1 (en) 2000-09-20
DE69803226T2 (en) 2002-09-19
ES2171313T3 (en) 2002-09-01
WO1999028609A1 (en) 1999-06-10

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