EP1794441B1 - Metal protector for fuel manifold to avoid damage upon impact - Google Patents
Metal protector for fuel manifold to avoid damage upon impact Download PDFInfo
- Publication number
- EP1794441B1 EP1794441B1 EP05800242A EP05800242A EP1794441B1 EP 1794441 B1 EP1794441 B1 EP 1794441B1 EP 05800242 A EP05800242 A EP 05800242A EP 05800242 A EP05800242 A EP 05800242A EP 1794441 B1 EP1794441 B1 EP 1794441B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective device
- metal
- fixing
- columns
- plastic
- 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.)
- Not-in-force
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
- F02M2200/185—Fuel-injection apparatus having means for maintaining safety not otherwise provided for means for improving crash safety
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
Definitions
- the present invention relates to the protection of injection ramps, called common ramps or “common rail”, which are mounted on internal combustion engines.
- the so-called common-rail injection systems which are used to supply an internal combustion engine with fuel include in particular a pressurized fuel storage ramp which supplies the injectors with fuel.
- This ramp is located outside the engine. It is necessary to protect this ramp to avoid having any fuel leaks following a shock on the ramp, resulting for example from a frontal impact of the vehicle comprising a motor with such an injection system.
- Injection rail protectors have already been used, such as protectors of the form of a sheet fixed to the engine. These protectors are not completely satisfactory because they only take into account the impact resistance aspect.
- the invention provides a device for protection against shocks of a common injection rail mounted on an internal combustion engine comprising means for fixing a component on the device.
- This component 1 is a casting part which comprises in particular ducts 2 of air intake.
- This component 1 may be a nozzle holder block.
- the nozzle holder 1 is fixed to the engine. It comprises injector wells 3 in which injectors 10 are fixed. Injector wells 3 are aligned with each other in a direction parallel to the longitudinal axis of the injector holder block 1.
- a common rail 11 is mounted on the injectors 10.
- the common rail 11 consists of an elongated tube. It comprises a fuel supply port 12 pressurized by an injection pump not shown, and it distributes the fuel through the orifices 13 to the injectors 10.
- the ramp 11 is disposed above the injectors 10, above of the injector holder 1.
- a protective device for example a protective cover 20.
- the protective cover 20 comprises means for fixing a component on this cover 20, for example means for fixing a not shown coil supply module.
- fixing means may be made in part of plastic, for example in the context of a plastic molding operation. They can also be made partly in metallic material.
- the cover 20 consists of a metal frame 30 to resist these shocks, and a portion 40 overmolded plastic.
- the metal armature 30 consists of a plate of the cut and bent steel sheet type which comprises columns 31, bearing ends 32, reinforcing portions 33a, 33b and 33c of the overmoulded portion 40, passages 35 for the screws 7 fixing the cover 20 on the injector holder block 1, a main part 34.
- a sheet metal plate is first cut to define the bearing ends 32, the columns 31 and the reinforcement portions 33a, 33b and 33c of the plastic part 40. folding the columns 31 to give them their tubular form. Then the columns 31 are bent at about 90 degrees with respect to the main part 34 and finally the main part 34 is bent by an angle less than 90 degrees in the direction of the fixing columns along the fold line 36. .
- the metal armature 30 comprises two columns 31 and four support ends 32, two of which are arranged opposite the columns 31 once the main portion 34 folded.
- the metal armature 30 is folded in the shape of a "U” or "V", so that the ends of the columns 31 and the bearing ends 32 form the ends of the U or Vé that rest on the hold injector door 1.
- the plastic part 40 surrounds the metal frame 30 with the exception of the columns 31 and the support ends 32, and it comprises a support interface 42, lugs 43 and support lugs 44 arranged at the ends of the protective hood.
- the plastic part 40 is made by overmolding around the metal frame 30; the metal armature 30 is first placed in a not shown mold, then a plastic material is injected which covers the metal armature 30.
- the advantage of this overmolding is that the plastic part 40 can integrate support or maintenance functions in relation to other components.
- the tabs 43 allow to fix and guide a not shown cable.
- there is a support interface 42 for fixing for example a reel supply module not shown.
- This part 40 can be manufactured by any technique well known per se in the field of the implementation of plastics by molding.
- the metal frame 30 reinforces the plastic part, not only during shocks, but also for its support functions.
- the metal reinforcing portion 33a consolidates the support interface 42 made of plastic.
- the injector spacer 1 comprises bosses 5 provided to receive the ends of the columns 31.
- the bosses 5 are drilled and tapped to receive a screw 7 for fixing the protective cover 20 to the injector holder block 1.
- the bearing ends 32 of the metal armature 30 are supported on the inter-ducts 4 of the injector holder shim 1.
- the ends of the columns 31 are bevelled so that during tightening the force is distributed over the columns 31 and the bearing ends 32. and the vibratory aspects of the cover 20 on the injector holder block 1.
- the protective cover 20 is arranged to protect the common rail 11 against shocks. Indeed, the columns 31 are close to the ramp 11 and are sized to withstand these shocks.
- the metal reinforcement 30 is a thick sheet of about 4 mm thick on which one carries out operations of simple formatting, and whose major role is to resist frontal shocks that may occur during an accident.
- the metal reinforcement 30 can serve as a reinforcement of the plastic part 40 for fixing other elements such as a coil supply module.
- the plastic part 40 comes to bring a good finish to the hood, and it protects the metal frame 30 against the outside environment.
- it may include support interfaces of other components of the engine and / or the vehicle.
- the invention is not limited to the embodiment described above, and it can be carried out integrally by plastic molding.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Vehicle Body Suspensions (AREA)
- Air Bags (AREA)
Abstract
Description
La présente invention concerne la protection des rampes d'injection, appelées rampes communes ou encore « common-rail », qui sont montées sur des moteurs à combustion interne.The present invention relates to the protection of injection ramps, called common ramps or "common rail", which are mounted on internal combustion engines.
Les systèmes d'injection dits à rampe commune qui sont utilisés pour alimenter un moteur à combustion interne en carburant comportent notamment une rampe de stockage de carburant sous pression qui alimente les injecteurs en carburant. Cette rampe se trouve à l'extérieur du moteur. Il est nécessaire de protéger cette rampe pour éviter d'avoir des fuites éventuelles de carburant suite à un choc sur la rampe, provenant par exemple d'un choc frontale du véhicule comportant un moteur avec un tel système d'injection. On a déjà eu recours a des protecteurs de rampe d'injection, comme par exemple des protecteurs de la forme d'une tôle fixée sur le moteur. Ces protecteurs ne sont pas totalement satisfaisants, car ils ne prennent en compte que l'aspect résistance aux chocs.The so-called common-rail injection systems which are used to supply an internal combustion engine with fuel include in particular a pressurized fuel storage ramp which supplies the injectors with fuel. This ramp is located outside the engine. It is necessary to protect this ramp to avoid having any fuel leaks following a shock on the ramp, resulting for example from a frontal impact of the vehicle comprising a motor with such an injection system. Injection rail protectors have already been used, such as protectors of the form of a sheet fixed to the engine. These protectors are not completely satisfactory because they only take into account the impact resistance aspect.
Dans ce but l'invention fournit un dispositif de protection contre les chocs d'une rampe commune d'injection montée sur un moteur à combustion interne comportant des moyens de fixation d'un composant sur le dispositif.For this purpose the invention provides a device for protection against shocks of a common injection rail mounted on an internal combustion engine comprising means for fixing a component on the device.
Selon d'autres caractéristiques de l'invention :
- les moyens de fixation peuvent être réalisés en partie en matière plastique,
- les moyens de fixation peuvent être réalisés en partie en matière métallique,
- le dispositif peut comporter une armature métallique,
- l'armature métallique peut être constituée d'un tôle en acier,
- les moyens de fixation peuvent être réalisés en partie en matière plastique par surmoulage de l'armature métallique.
- les moyens de fixation peuvent comporter des pattes de fixations d'un câble.
- le composant peut être un module d'alimentation de bobines.
- the fixing means may be made in part of plastic material,
- the fixing means may be made in part of metallic material,
- the device may comprise a metal reinforcement,
- the metal frame may consist of a steel sheet,
- the fixing means may be made in part of plastic by overmolding the metal frame.
- the fixing means may comprise fixing lugs of a cable.
- the component may be a coil supply module.
La présente invention et ses avantages seront mieux compris à la lecture de la description détaillée d'un mode de réalisation pris à titre d'exemple et nullement limitatif, et illustré par les dessins annexés sur lesquels :
- la
figure 1 est un schéma du capot protecteur monté sur un composant du moteur à combustion interne - la
figure 2 est une vue en coupe du capot assemblé selon lafigure 1 - la
figure 3 est un schéma du capot protecteur seul - la
figure 4 est un schéma du développé de la partie métallique du capot protecteur
- the
figure 1 is a diagram of the protective cover mounted on a component of the internal combustion engine - the
figure 2 is a sectional view of the hood assembled according to thefigure 1 - the
figure 3 is a diagram of the protective hood alone - the
figure 4 is a diagram of the development of the metal part of the protective cover
Sur les
Une rampe commune 11 est montée sur les injecteurs 10. La rampe commune 11 est constituée d'un tube de forme allongée. Elle comporte un orifice d'alimentation 12 en carburant mis sous pression par une pompe d'injection non représentée, et elle distribue le carburant grâce aux orifices 13 de liaison aux injecteurs 10. La rampe 11 est disposée au dessus des injecteurs 10, au dessus de la cale porte injecteurs 1.A
En référence aussi à la
Selon l'invention, le capot protecteur 20 comporte des moyens de fixations d'un composant sur ce capot 20, par exemple des moyens de fixation d'un module d'alimentation de bobines non représenté.According to the invention, the
Ces moyens de fixation peuvent être réalisés en partie en matière plastique, par exemple dans le cadre d'une opération de moulage plastique. Ils peuvent aussi être réalisés en partie en matière métallique.These fixing means may be made in part of plastic, for example in the context of a plastic molding operation. They can also be made partly in metallic material.
Dans l'exemple de réalisation, le capot 20 est constitué d'une armature métallique 30 permettant de résister à ces chocs, et d'une partie 40 surmoulée en plastique.In the exemplary embodiment, the
En référence aussi à la
Pour fabriquer l'armature métallique 30, on commence par découper une plaque en tôle pour définir les extrémités d'appui 32, les colonnes 31 et les parties 33a, 33b et 33c de renfort de la partie en plastique 40. Ensuite, on procède au pliage des colonnes 31 pour leur donner leur forme tubulaire. Ensuite on procède au pliage des colonnes 31 à environ 90 degrés par rapport à la partie principale 34 et enfin on procède au pliage de la partie principale 34 d'un angle inférieur à 90 degré en direction des colonnes de fixation selon la ligne de pliage 36.In order to manufacture the
Dans l'exemple illustré, l'armature métallique 30 comporte deux colonnes 31 et quatre extrémités d'appui 32 dont deux sont disposées en face des colonnes 31 une fois la partie principale 34 pliée.In the illustrated example, the
L'armature métallique 30 est pliée en forme de « U » ou de « Vé », de manière à ce que les extrémités des colonnes 31 et les extrémités d'appui 32 forment les extrémités du U ou du Vé qui prennent appui sur la cale porte injecteurs 1.The
La partie en matière plastique 40 enrobe l'armature métallique 30 à l'exception des colonnes 31 et des extrémités d'appui 32, et elle comporte une interface de support 42, des pattes 43 et des pattes d'appui 44 disposées aux extrémités du capot protecteur. La partie en matière plastique 40 est réalisée par surmoulage autour de la l'armature métallique 30; l'armature métallique 30 est d'abord placée dans un moule non représenté, puis on injecte une matière plastique qui recouvre l'armature métallique 30. L'avantage de ce surmoulage est que la partie en matière plastique 40 peut intégrer des fonctions de support ou de maintien en rapport avec d'autres composants. Par exemple, les pattes 43 permettent de fixer et de guider un câble non représenté. De même, on retrouve une interface de support 42 permettant de fixer par exemple un module d'alimentation des bobines non représenté.The
Cette partie 40 peut être fabriquée par toute technique bien connue en soi dans le domaine de la mise en oeuvre des matières plastiques par moulage.This
L'armature métallique 30 renforce la partie en plastique, non seulement lors des chocs, mais aussi pour ses fonctions de support. Par exemple la partie de renfort métallique 33a vient consolider l'interface de support 42 en plastique.The
La cale porte injecteurs 1 comporte des bossages 5 prévus pour recevoir les extrémités des colonnes 31. Les bossages 5 sont percés et taraudés pour recevoir une vis 7 de fixation du capot protecteur 20 sur la cale porte injecteurs 1. Les extrémités d'appui 32 de l'armature métallique 30 prennent appui sur les inter conduits 4 de la cale porte injecteurs 1. Les extrémités des colonnes 31 sont biseautées de façon que lors du serrage l'effort soit réparti sur les colonnes 31 et sur les extrémités appui 32. On limite ainsi les aspects vibratoires du capot 20 sur la cale porte injecteurs 1.The injector spacer 1 comprises
Pour fixer le capot protecteur 20 sur la cale porte injecteurs 1 on peut utiliser des vis 7 se fixant dans les filetages prévus dans les bossages, ou bien on peut aussi utiliser des goujons se fixant dans les filetages et dépassant des colonnes 31, le capot 20 se fixant sur la cale porte injecteurs 1 à l'aide d'écrous vissés sur les goujons.To fix the
Le capot protecteur 20 est disposé de façon à protéger la rampe commune 11 contre les chocs. En effet, les colonnes 31 sont à proximité de la rampe 11 et sont dimensionnées pour résister à ces chocs.The
Un des avantages de la présente invention est que l'on peut dissocier des fonctions pour chacune des parties métalliques 30 et plastiques 40. Ainsi l'armature métallique 30 est une tôle de forte épaisseur d'environ 4 mm sur laquelle on réalise des opérations de mise en forme simples, et dont le rôle majeur est de résister aux chocs frontaux pouvant survenir lors d'un accident. Dans la mesure où le procédé de fabrication le permet, l'armature métallique 30 peut servir de renfort de la partie en matière plastique 40 pour la fixation d'autres éléments comme par exemple un module d'alimentation des bobines.One of the advantages of the present invention is that one can dissociate functions for each of the
La partie en matière plastique 40 vient apporter une bonne finition au capot, et elle protège l'armature métallique 30 contre l'environnement extérieur. De plus, compte tenu du fait qu'elle est réalisée par surmoulage autour de l'armature métallique 30, elle peut comporter des interfaces de support d'autres composants du moteur et/ou du véhicule.The
L'invention n'est pas limitée au mode de réalisation décrit ci-dessus, et elle peut être réalisée intégralement par moulage en matière plastique.The invention is not limited to the embodiment described above, and it can be carried out integrally by plastic molding.
Claims (7)
- Protective device (20) for protecting a common injection rail (11) mounted on an internal combustion engine against impacts, the device being fixed on a component (1) of the engine and consisting of a metal reinforcement (30) of which at least two columns (31) dimensioned to withstand impacts are situated in the vicinity of the rail (11), characterized in that it comprises means for fixing another component on the device.
- Protective device according to Claim 1, characterized in that the fixing means are produced partly from plastic.
- Protective device according to Claim 1 or 2, characterized in that the fixing means are produced partly from metal.
- Protective device according to any one of Claims 1 to 3, characterized in that the metal reinforcement (30) consists of a steel plate.
- Protective device according to any one of Claims 1 to 4, characterized in that the fixing means are produced partly from plastic by overmolding the metal reinforcement (30).
- Protective device according to any one of Claims 2 to 5, characterized in that the fixing means comprise tabs (43) for fixing a cable.
- Protective device according to any one of Claims 1 to 6, characterized in that the component is a coil energization module.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0452101A FR2875555B1 (en) | 2004-09-21 | 2004-09-21 | METAL PROTECTOR OF THE GAS RAMP TO AVOID DAMAGE DURING SHOCK |
PCT/FR2005/050769 WO2006032821A1 (en) | 2004-09-21 | 2005-09-20 | Metal protector for fuel manifold to avoid damage upon impact |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1794441A1 EP1794441A1 (en) | 2007-06-13 |
EP1794441B1 true EP1794441B1 (en) | 2008-05-28 |
Family
ID=34951593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05800242A Not-in-force EP1794441B1 (en) | 2004-09-21 | 2005-09-20 | Metal protector for fuel manifold to avoid damage upon impact |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1794441B1 (en) |
JP (1) | JP4812766B2 (en) |
AT (1) | ATE397158T1 (en) |
BR (1) | BRPI0515504A (en) |
DE (1) | DE602005007255D1 (en) |
FR (1) | FR2875555B1 (en) |
WO (1) | WO2006032821A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7610893B2 (en) * | 2006-02-10 | 2009-11-03 | Federal-Mogul Worldwide, Inc. | Plastic cover having metal reinforcement for internal combustion engine applications and method of construction |
FR2912472A1 (en) * | 2007-02-12 | 2008-08-15 | Renault Sas | Internal combustion engine i.e. oil engine, fitting for supporting air conditioning compressor, has protection unit for protecting part of manifold against shocks, extending along manifold, and provided at reduced distance from manifold |
JP6074135B2 (en) * | 2011-03-29 | 2017-02-01 | 現代自動車株式会社Hyundai Motor Company | Manufacturing method of intake manifold module for preventing automobile fuel leakage |
CN103397962A (en) * | 2013-07-04 | 2013-11-20 | 广西玉柴机器股份有限公司 | Engine high pressure oil tube cover plate |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0517419Y2 (en) * | 1987-04-04 | 1993-05-11 | ||
DE9410232U1 (en) * | 1994-06-27 | 1995-11-02 | Robert Bosch Gmbh, 70469 Stuttgart | Fuel injection device for internal combustion engines |
JP3310144B2 (en) * | 1995-09-13 | 2002-07-29 | 株式会社ユニシアジェックス | Fuel piping system |
DE19716513C2 (en) * | 1997-04-19 | 1999-02-11 | Mtu Friedrichshafen Gmbh | Fuel injection system for an internal combustion engine with a common rail |
DE19801171C1 (en) * | 1998-01-15 | 1999-04-15 | Daimler Chrysler Ag | fuel injector for multiple cylinder internal combustion engine |
JP2001317436A (en) * | 2000-05-09 | 2001-11-16 | Fuji Heavy Ind Ltd | Protecting device for fuel system of engine |
JP2003345417A (en) * | 2002-05-24 | 2003-12-05 | Bosch Automotive Systems Corp | Standardizing method of component characteristic code in production system for vehicle and controller for vehicle using standardized characteristic code |
JP4049684B2 (en) * | 2003-02-14 | 2008-02-20 | 愛知機械工業株式会社 | Engine fuel system protection device |
GB2399392A (en) * | 2003-03-13 | 2004-09-15 | Visteon Global Tech Inc | I.c. engine moulded fuel rail with crash-resistant protecting structure |
-
2004
- 2004-09-21 FR FR0452101A patent/FR2875555B1/en active Active
-
2005
- 2005-09-20 EP EP05800242A patent/EP1794441B1/en not_active Not-in-force
- 2005-09-20 AT AT05800242T patent/ATE397158T1/en not_active IP Right Cessation
- 2005-09-20 BR BRPI0515504-5A patent/BRPI0515504A/en active Search and Examination
- 2005-09-20 WO PCT/FR2005/050769 patent/WO2006032821A1/en active IP Right Grant
- 2005-09-20 JP JP2007531813A patent/JP4812766B2/en not_active Expired - Fee Related
- 2005-09-20 DE DE602005007255T patent/DE602005007255D1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE602005007255D1 (en) | 2008-07-10 |
FR2875555B1 (en) | 2009-01-30 |
WO2006032821A1 (en) | 2006-03-30 |
BRPI0515504A (en) | 2008-07-29 |
FR2875555A1 (en) | 2006-03-24 |
EP1794441A1 (en) | 2007-06-13 |
JP2008513668A (en) | 2008-05-01 |
JP4812766B2 (en) | 2011-11-09 |
ATE397158T1 (en) | 2008-06-15 |
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