EP0433518A1 - Improvement in devices to control fluid flow - Google Patents

Improvement in devices to control fluid flow Download PDF

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Publication number
EP0433518A1
EP0433518A1 EP89440141A EP89440141A EP0433518A1 EP 0433518 A1 EP0433518 A1 EP 0433518A1 EP 89440141 A EP89440141 A EP 89440141A EP 89440141 A EP89440141 A EP 89440141A EP 0433518 A1 EP0433518 A1 EP 0433518A1
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EP
European Patent Office
Prior art keywords
axis
plate
housing
rotation
casing
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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.)
Withdrawn
Application number
EP89440141A
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German (de)
French (fr)
Inventor
Didier Theron
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.)
Mecaplast SAM
Original Assignee
Mecaplast SAM
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Publication date
Application filed by Mecaplast SAM filed Critical Mecaplast SAM
Priority to EP89440141A priority Critical patent/EP0433518A1/en
Publication of EP0433518A1 publication Critical patent/EP0433518A1/en
Withdrawn legal-status Critical Current

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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 relates to improvements to devices intended for regulating the flow rate of fluids and in particular, but not exclusively, the air intake flow rate in internal combustion engines equipped with injection systems.
  • the present invention seeks improvements to these devices aimed at enabling them to overcome these drawbacks and these constraints.
  • the butterfly is molded from a thermoplastic material with low thermal inertia and a low coefficient of friction, such as, for example, polytetrafluoroethylene (TEFLON) or the like, and it is in a planar shape with a generally elliptical shape.
  • TEFLON polytetrafluoroethylene
  • the term "ellipse” or “elliptical” will be used here to define this shape, it being understood that the precise shape of said butterfly, as well as, as will be seen further on, that of the housing, which correspond, must be adapted to the specificity of the progressiveness desired for the acceleration of the engine, and consequently that of the vehicle.
  • said butterfly has the shape of an ellipse, and it is mounted tilting about an axis arranged in the major axis of said ellipse, in a housing whose central volume is delimited by two curved surfaces eccentric each by relative to the area swept by the two half-ellipses located on each side of said axis, so that the rotation of the butterfly around its axis determines the opening (or closing) of two passages with the desired progressiveness, even in the case brutal operation of the accelerator.
  • the barrel or casing is molded from a thermoplastic material, preferably of the polyamide or polyimide type, which is both very light and very resistant, this molding making it possible to create a shape of substantially elliptical section (as defined above). ), comprising, at the level of the butterfly, rounded walls eccentric with respect to the surfaces swept by the two sides of the butterfly.
  • the butterfly instead of being made of brass, as in the past, in order to be able to withstand the high pressures (or depression) at closing, which involved a complicated mechanical assembly, consists of a simple piece of material without thermal inertia, directly molded on the axis, of elliptical shape corresponding to that of the housing, said axis being along the major axis of said ellipse, the two faces of said butterfly having at most only the length of the minor axis of l 'ellipse, which gives it better stiffness. Furthermore, the use of the proposed materials considerably reduces the icing effects, taking into account the low thermal inertia of the components, thereby compensating for the difference in elastic modulus of the proposed material compared to those of metal.
  • the device according to the invention consists, in known manner, of a casing or barrel 1 of generally cylindrical appearance and of a butterfly 2 rotating around an axis 3, perpendicular to the axis of symmetry of the barrel 1.
  • the cross section of the barrel 1 is an ellipse, that is to say that it was in the general shape of a cylinder with elliptical generator, and the butterfly 2 also has the shape of an ellipse, the axis 3 being mounted along the long axis of this ellipse.
  • the barrel in the pivoting zone of the butterfly, has two rounded surfaces 4-4 ′, eccentric with respect to the surfaces 5-5 ′, swept by the two extreme edges 6-6 ′ of the butterfly 2.
  • L 'space between the pairs of surfaces 5/6, 5 ′ / 6 ′ represents the passage offered to the air according to the angle of inclination of the butterfly 2 ′, determined by the degree of depression of the accelerator.
  • the elliptical butterfly 2 is of decreasing thickness from the center towards the edges, and that the edges 6-6 ′ undergoing the most brutal forces are those which are the least distant from the axis 3, which ensures a satisfactory stiffness in the butterfly.
  • the invention is not limited to air intake boxes in internal combustion engines, but can be applied with all its advantages to all devices for adjusting the flow rate of any fluid.
  • the proposed device allows a setting at closing of about 8 ° to 10 ° relative to the horizontal, which further reduces the effects that would cause slight icing.

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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)

Abstract

Device for regulating the rate of flow of a fluid, of the type having in a casing (1) which is generally cylindrical in appearance a plate (2) mounted for rotation about an axis (3) perpendicular to the axis of symmetry of this casing, between a closed position in which its periphery is tangential to the inside wall of the casing and a wide open position in which its periphery is furthest from the said inside wall, characterised in that the straight section of the casing is essentially elliptical in general appearance so that it can be adapted to the specificity of the desired progressivity for acceleration of the motor, whilst the said plate has a corresponding essentially elliptical shape, the axis of rotation of the plate being situated along the large axis of the ellipse, and the walls (4, 4') of the casing being rounded opposite the surfaces (5, 5') swept by the two semi-ellipses defined by the said axis so that they are moved out of centre in relation to the said surfaces in such a way that, by rotation of the said plate, the opening presented to the said fluid varies progressively as a function of the variations in the distance between the said semi-ellipses and the said walls. <IMAGE>

Description

La présente invention concerne des perfectionnements aux dispositifs destinés à la régulation du débit des fluides et notamment mais non exclusivement du débit d'admission de l'air dans les moteurs à combustion interne équipés de systèmes d'injection.The present invention relates to improvements to devices intended for regulating the flow rate of fluids and in particular, but not exclusively, the air intake flow rate in internal combustion engines equipped with injection systems.

Ces derniers dispositifs, désignés généralement par "boîtier papillon" sont actuellement réalisés en matériaux usinés tels que l'aluminium ou ses alliages, ce qui impose aux fûts constituant le corps du dispositif des formes simples généralement simplement cylindrique. Il en résulte que la progressivité de la régulation, qui est nécessaire pour que cette régulation soit optimale, ne peut être obtenue que par des systèmes mécaniques extérieurs au dispositif, tels que des systèmes faisant intervenir un embiellage, des jeux de cames et analogues.These latter devices, generally designated by "butterfly housing" are currently made of machined materials such as aluminum or its alloys, which imposes on the drums constituting the body of the device simple shapes which are generally simply cylindrical. As a result, the progressiveness of the regulation, which is necessary for this regulation to be optimal, can only be obtained by mechanical systems external to the device, such as systems involving a connecting rod assembly, sets of cams and the like.

La masse de ces dispositifs, ainsi que les matériaux utilisés pour assurer la rigidité du papillon monté dans le fût de manière qu'il ne soit pas déformé sous contraintes de pression élevées, accélèrent les phénomènes de givrage par détente adiabatique, conduisant au coincement du papillon, ce qui oblige à associer au dispositif des moyens de réchauffage, par exemple par circulation de l'eau du moteur ou une thermorésistance.The mass of these devices, as well as the materials used to ensure the rigidity of the butterfly mounted in the barrel so that it is not deformed under high pressure stresses, accelerate the phenomena of icing by adiabatic expansion, leading to jamming of the butterfly , which requires associating with the device heating means, for example by circulation of the engine water or a heat resistance.

La présente invention vise des perfectionnements à ces dispositifs visant à leur permettre de s'affranchir de ces inconvénients et de ces contraintes.The present invention seeks improvements to these devices aimed at enabling them to overcome these drawbacks and these constraints.

Ces perfectionnements concernent à la fois la forme du fût, la forme du papillon et la disposition du papillon dans le fût. Ces nouvelles formes, caractéristiques de l'invention assurent la progressivité souhaitée du débit et l'élimination des systèmes de commande sophistiqués du papillon. Au surplus, la réduction du givrage, et la diminution des pertes de charge dans le boîtier, notamment à grande ouverture, qui sont des conséquences avantageuses de ces perfectionnements, sont rendues possibles par la technologie utilisée pour la réalisation du fût et du papillon, et notamment par le remplacement de l'aluminium et de ses alliages par des matériaux thermoplastiques appropriés.These improvements concern both the shape of the barrel, the shape of the butterfly and the arrangement of the butterfly in the barrel. These new forms, characteristic of the invention ensure the desired progressiveness of the flow rate and the elimination of the sophisticated throttle control systems. In addition, the reduction in icing, and the reduction in pressure drops in the housing, in particular with a large opening, which are advantageous consequences of these improvements, are made possible by the technology used to produce the barrel and the butterfly, and in particular by replacing aluminum and its alloys with suitable thermoplastic materials.

Selon l'invention, le papillon est moulé en matériau thermoplastique à faible inertie thermique et à faible coefficient de frottement, tel que par exemple le polytétrafluoroéthylène (TEFLON) ou analogue, et il se présente sous une forme plane d'allure générale sensiblement elliptique. A cet égard, il convient de noter que pour la commodité de la présente description, on utilisera ici pour définir cette forme le terme "ellipse" ou "elliptique", étant entendu que la forme précise dudit papillon, ainsi que, comme on le verra plus loin, celle du boîtier, qui se correspondent, doivent être adaptées à la spécificité de la progressivité souhaitée pour l'accélération du moteur, et par suite celle du véhicule.According to the invention, the butterfly is molded from a thermoplastic material with low thermal inertia and a low coefficient of friction, such as, for example, polytetrafluoroethylene (TEFLON) or the like, and it is in a planar shape with a generally elliptical shape. In this regard, it should be noted that for the convenience of the present description, the term "ellipse" or "elliptical" will be used here to define this shape, it being understood that the precise shape of said butterfly, as well as, as will be seen further on, that of the housing, which correspond, must be adapted to the specificity of the progressiveness desired for the acceleration of the engine, and consequently that of the vehicle.

Selon l'invention, ledit papillon a la forme d'une ellipse, et il est monté basculant autour d'un axe disposé dans le grand axe de ladite ellipse, dans un boîtier dont le volume central est délimité par deux surfaces courbes excentrées chacune par rapport à la surface balayée par les deux demi-­ellipses situées de chaque côté dudit axe, de manière telle que la rotation du papillon autour de son axe détermine l'ouverture (ou la fermeture) de deux passages avec la progressivité voulue, même en cas de manoeuvre brutale de l'accélérateur.According to the invention, said butterfly has the shape of an ellipse, and it is mounted tilting about an axis arranged in the major axis of said ellipse, in a housing whose central volume is delimited by two curved surfaces eccentric each by relative to the area swept by the two half-ellipses located on each side of said axis, so that the rotation of the butterfly around its axis determines the opening (or closing) of two passages with the desired progressiveness, even in the case brutal operation of the accelerator.

Dans la pratique, le fût ou boîtier est moulé en une matière thermoplastique, de préférence du type polyamide ou poly-imide, à la fois très légère et très résistante, ce moulage permettant de créer une forme de section sensiblement elliptique (comme définie plus haut), comportant, au niveau du papillon, des parois arrondies excentrées par rapport aux surfaces balayées par les deux côtés du papillon.In practice, the barrel or casing is molded from a thermoplastic material, preferably of the polyamide or polyimide type, which is both very light and very resistant, this molding making it possible to create a shape of substantially elliptical section (as defined above). ), comprising, at the level of the butterfly, rounded walls eccentric with respect to the surfaces swept by the two sides of the butterfly.

La papillon, au lieu d'être en laiton, comme dans le passé, pour pouvoir supporter les fortes pressions (ou dépression) à la fermeture, ce qui impliquait un montage mécanique compliqué, consiste en une simple pièce en matériau sans inertie thermique, directement moulée sur l'axe, de forme elliptique correspondant à celle du boîtier, ledit axe étant le long du grand axe de ladite ellipse, les deux faces dudit papillon n'ayant au maximum que la longueur du petit axe de l'ellipse, ce qui lui assure une meilleure raideur. Par ailleurs, l'emploi des matériaux proposés diminue considérablement les effets de givrage, compte-tenu de la faible inertie thermique des composants, compensant par là même la différence de module d'élasticité du matériau proposé par rapport à ceux métalliques.The butterfly, instead of being made of brass, as in the past, in order to be able to withstand the high pressures (or depression) at closing, which involved a complicated mechanical assembly, consists of a simple piece of material without thermal inertia, directly molded on the axis, of elliptical shape corresponding to that of the housing, said axis being along the major axis of said ellipse, the two faces of said butterfly having at most only the length of the minor axis of l 'ellipse, which gives it better stiffness. Furthermore, the use of the proposed materials considerably reduces the icing effects, taking into account the low thermal inertia of the components, thereby compensating for the difference in elastic modulus of the proposed material compared to those of metal.

C'est le degré d'excentricité des parois arrondies du fût par rapport aux surfaces balayées par les deux demi-ellipses du papillon qui permet d'assurer à l'ouverture et à la fermeture le degré de progressivité voulue.It is the degree of eccentricity of the rounded walls of the barrel relative to the surfaces swept by the two half-ellipses of the butterfly which makes it possible to ensure the desired degree of progressiveness at opening and closing.

On va décrire maintenant l'invention en se référant au dessin annexé, sur lequel:

  • - La figure 1 est une coupe verticale du boîtier selon l'invention, prise suivant I-I de la figure 3.
  • - La figure 2 est une coupe verticale du même boîtier, prise suivant II-II de la figure 3.
  • - La figure 3 est une coupe horizontale du même boîtier prise suivant III-III de la figure 1.
The invention will now be described with reference to the appended drawing, in which:
  • - Figure 1 is a vertical section of the housing according to the invention, taken along II of Figure 3.
  • - Figure 2 is a vertical section of the same housing, taken along II-II of Figure 3.
  • - Figure 3 is a horizontal section of the same housing taken along III-III of Figure 1.

Le dispositif selon l'invention se compose, de manière connue, d'un boîtier ou fût 1 d'allure générale cylindrique et d'un papillon 2 rotatif autour d'un axe 3, perpendiculaire à l'axe de symétrie du fût 1.The device according to the invention consists, in known manner, of a casing or barrel 1 of generally cylindrical appearance and of a butterfly 2 rotating around an axis 3, perpendicular to the axis of symmetry of the barrel 1.

Selon l'invention, la section droite du fût 1 est une ellipse, c'est à dire que ce fût a la forme générale d'un cylindre à génératrice elliptique, et le papillon 2 a également la forme d'une ellipse, l'axe 3 étant monté le long du grand axe de cette ellipse.According to the invention, the cross section of the barrel 1 is an ellipse, that is to say that it was in the general shape of a cylinder with elliptical generator, and the butterfly 2 also has the shape of an ellipse, the axis 3 being mounted along the long axis of this ellipse.

Selon l'invention également, dans la zone de pivotement du papillon, le fût comporte deux surfaces arrondies 4-4′, excentrées par rapport aux surfaces 5-­5′, balayées par les deux bord extrêmes 6-6′ du papillon 2. L'espace compris entre les couples de surfaces 5/6, 5′/6′ représente le passage offert à l'air selon l'angle d'inclinaison du papillon 2′, déterminé par le degré d'enfoncement de l'accélérateur. Les formes ainsi décrites sont, par calcul, déterminées pour chaque cas d'application et dépendent donc de la progressivité recherchée.According to the invention also, in the pivoting zone of the butterfly, the barrel has two rounded surfaces 4-4 ′, eccentric with respect to the surfaces 5-5 ′, swept by the two extreme edges 6-6 ′ of the butterfly 2. L 'space between the pairs of surfaces 5/6, 5 ′ / 6 ′ represents the passage offered to the air according to the angle of inclination of the butterfly 2 ′, determined by the degree of depression of the accelerator. The forms thus described are, by calculation, determined for each application case and therefore depend on the progressiveness sought.

On notera que le papillon elliptique 2 est d'épaisseur décroissante depuis le centre vers les bords, et que les bords 6-6′ subissant les efforts les plus brutaux sont ceux qui sont le moins éloignés de l'axe 3, ce qui assure une raideur satisfaisante au papillon.It will be noted that the elliptical butterfly 2 is of decreasing thickness from the center towards the edges, and that the edges 6-6 ′ undergoing the most brutal forces are those which are the least distant from the axis 3, which ensures a satisfactory stiffness in the butterfly.

Bien entendu, l'invention n'est pas limitée aux boîtiers d'admission d'air dans les moteurs à combustion interne, mais peut s'appliquer avec tous ses avantages à tous les dispositifs de réglage du débit d'un fluide quelconque.Of course, the invention is not limited to air intake boxes in internal combustion engines, but can be applied with all its advantages to all devices for adjusting the flow rate of any fluid.

On notera que dans les boîtiers connus à ce jour, outre les accessoires périphériques pour la progressivité, le papillon est en position fermeture calé proche de l'horizontale pour également améliorer cette progressivité. D'où coincement facilement opérable surtout si phénomène de givrage.It will be noted that in the boxes known to date, in addition to the peripheral accessories for the progressiveness, the butterfly is in the closed position locked close to the horizontal to also improve this progressiveness. Hence easily operable jamming especially if icing phenomenon.

Le dispositif proposé, permet un calage à la fermeture d'environ 8° à 10° par rapport à l'horizontale ce qui réduit encore les effets que provoquerait un léger givrage.The proposed device allows a setting at closing of about 8 ° to 10 ° relative to the horizontal, which further reduces the effects that would cause slight icing.

Claims (3)

1. Dispositif pour le réglage du débit d'un fluide, du type comportant dans un boîtier d'allure générale cylindrique, une plaque montée rotative autour d'un axe perpendiculaire à l'axe de symétrie de ce boîtier, entre une position fermée où sa périphérie est tangente à la paroi interne du boîtier et une position grande ouverte où sa périphérie est la plus éloignée de ladite paroi interne, caractérisé en ce que, la section droite du boîtier est d'allure générale sensiblement elliptique, en vue d'être adaptée à la spécificité de la progressivité souhaitée pour l'accélération du moteur, tandis que ladite plaque a une forme sensiblement elliptique correspondante, l'axe de rotation de la plaque étant situé le long du grand axe de l'ellipse, et les parois du boîtier étant arrondies face aux surfaces balayées par les deux demi-ellipses définies par ledit axe, de manière à être excentrées par rapport auxdites surfaces, de telle sorte que, par rotation de ladite plaque, le passage offert audit fluide varie progressivement en fonction des variations de la distance entre lesdites demi-­ellipses et lesdites parois.1. Device for adjusting the flow rate of a fluid, of the type comprising in a generally cylindrical housing, a plate rotatably mounted about an axis perpendicular to the axis of symmetry of this housing, between a closed position where its periphery is tangent to the internal wall of the housing and a wide open position where its periphery is the furthest from said internal wall, characterized in that, the cross section of the housing has a generally elliptical appearance, in order to be adapted to the specificity of the progressivity desired for the acceleration of the motor, while said plate has a corresponding substantially elliptical shape, the axis of rotation of the plate being located along the major axis of the ellipse, and the walls of the housing being rounded opposite the surfaces swept by the two half-ellipses defined by said axis, so as to be eccentric with respect to said surfaces, so that, by rotation n of said plate, the passage offered to said fluid varies progressively as a function of variations in the distance between said half-ellipses and said walls. 2. Dispositif selon la revendication 1, caractérisé en ce que ladite plaque elliptique est réalisée en un matériau à faible inertie thermique et faible coefficient de frottement, tel que, de préférence, le polytétrafluoroéthylène, ledit axe de rotation étant noyé dans la zone centrale de ladite plaque, plus épaisse que les bords.2. Device according to claim 1, characterized in that said elliptical plate is made of a material with low thermal inertia and low coefficient of friction, such as, preferably, polytetrafluoroethylene, said axis of rotation being embedded in the central zone of said plate, thicker than the edges. 3. Dispositif selon les revendications 1 et 2, caractérisé en ce que le boîtier est réalisé par moulage de matière thermoplastique du type polyamide ou poly-imide.3. Device according to claims 1 and 2, characterized in that the housing is produced by molding of thermoplastic material of the polyamide or polyimide type.
EP89440141A 1989-12-21 1989-12-21 Improvement in devices to control fluid flow Withdrawn EP0433518A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP89440141A EP0433518A1 (en) 1989-12-21 1989-12-21 Improvement in devices to control fluid flow

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Application Number Priority Date Filing Date Title
EP89440141A EP0433518A1 (en) 1989-12-21 1989-12-21 Improvement in devices to control fluid flow

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EP0433518A1 true EP0433518A1 (en) 1991-06-26

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694963A1 (en) * 1992-08-21 1994-02-25 Solex Butterfly body with evolutionary intake duct and method of manufacturing such a body.
WO1994012781A1 (en) * 1992-11-28 1994-06-09 Robert Bosch Gmbh Throttle device for an internal combustion engine and process for producing venturis in the throttle device
EP1065360A3 (en) * 1999-06-29 2001-08-29 Siemens Canada limited Plastic throttle body
US6764062B1 (en) 1999-06-29 2004-07-20 Siemens Vdo Automotive, Inc. Plastic throttle body
EP2184468A1 (en) * 2008-11-11 2010-05-12 Honda Motor Co., Ltd Intake System for Internal Combustion Engines

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Publication number Priority date Publication date Assignee Title
US3857406A (en) * 1973-01-02 1974-12-31 Ferro Mfg Corp Valve
DE2558272A1 (en) * 1975-12-23 1977-07-07 Elco Oel & Gasbrenner Variable setting throttle butterfly valve - has rectangular plate valve between axially offset curved channel sides
EP0023133A1 (en) * 1979-07-19 1981-01-28 Kerotest Manufacturing Corporation Plastics butterfly valve
EP0109792A1 (en) * 1982-11-22 1984-05-30 General Motors Corporation Valve assembly and method of machining
DE3432766A1 (en) * 1984-09-06 1986-03-13 Robert Bosch Gmbh, 7000 Stuttgart Throttle plate
FR2575518A1 (en) * 1984-12-28 1986-07-04 Inst Francais Du Petrole Seat and throttle valve assembly of a gas flow control device
JPS6220639A (en) * 1985-07-19 1987-01-29 Keihin Seiki Mfg Co Ltd Butterfly carburetor for multivalve engine
US4786031A (en) * 1987-11-13 1988-11-22 Phillips Petroleum Company Fiber reinforced thermoplastic butterfly valve element

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857406A (en) * 1973-01-02 1974-12-31 Ferro Mfg Corp Valve
DE2558272A1 (en) * 1975-12-23 1977-07-07 Elco Oel & Gasbrenner Variable setting throttle butterfly valve - has rectangular plate valve between axially offset curved channel sides
EP0023133A1 (en) * 1979-07-19 1981-01-28 Kerotest Manufacturing Corporation Plastics butterfly valve
EP0109792A1 (en) * 1982-11-22 1984-05-30 General Motors Corporation Valve assembly and method of machining
DE3432766A1 (en) * 1984-09-06 1986-03-13 Robert Bosch Gmbh, 7000 Stuttgart Throttle plate
FR2575518A1 (en) * 1984-12-28 1986-07-04 Inst Francais Du Petrole Seat and throttle valve assembly of a gas flow control device
JPS6220639A (en) * 1985-07-19 1987-01-29 Keihin Seiki Mfg Co Ltd Butterfly carburetor for multivalve engine
US4786031A (en) * 1987-11-13 1988-11-22 Phillips Petroleum Company Fiber reinforced thermoplastic butterfly valve element

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 196 (M-601)(2643) 24 juin 1987, & JP-A-62 20639 (KEIHIN SEIKI MFG CO LTD) 29 janvier 1987, *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694963A1 (en) * 1992-08-21 1994-02-25 Solex Butterfly body with evolutionary intake duct and method of manufacturing such a body.
EP0589733A1 (en) * 1992-08-21 1994-03-30 Magneti Marelli France Progressively shaped throttle valve body and manufacturing method thereof
US5374031A (en) * 1992-08-21 1994-12-20 Solex Butterfly-valve assembly having an admission passage of progressively-changing shape, and method of manufacturing same
WO1994012781A1 (en) * 1992-11-28 1994-06-09 Robert Bosch Gmbh Throttle device for an internal combustion engine and process for producing venturis in the throttle device
US5465696A (en) * 1992-11-28 1995-11-14 Robert Bosch Gmbh Throttle appliance for an internal combustion engine and method of manufacturing metering walls in the throttle appliance
EP1065360A3 (en) * 1999-06-29 2001-08-29 Siemens Canada limited Plastic throttle body
US6764062B1 (en) 1999-06-29 2004-07-20 Siemens Vdo Automotive, Inc. Plastic throttle body
EP2184468A1 (en) * 2008-11-11 2010-05-12 Honda Motor Co., Ltd Intake System for Internal Combustion Engines

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