FR2875862A1 - Direct injection heat engine for motor vehicle, has injector placed in cylinder head, and tube with upper end having tapered face of reduced conicity, which cooperates, by hoping, with inner wall of upper cylindrical face of head - Google Patents
Direct injection heat engine for motor vehicle, has injector placed in cylinder head, and tube with upper end having tapered face of reduced conicity, which cooperates, by hoping, with inner wall of upper cylindrical face of head Download PDFInfo
- Publication number
- FR2875862A1 FR2875862A1 FR0452155A FR0452155A FR2875862A1 FR 2875862 A1 FR2875862 A1 FR 2875862A1 FR 0452155 A FR0452155 A FR 0452155A FR 0452155 A FR0452155 A FR 0452155A FR 2875862 A1 FR2875862 A1 FR 2875862A1
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- France
- Prior art keywords
- tube
- cylinder head
- bore
- heat engine
- bearing surface
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Classifications
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- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
"Moteur thermique comportant une culasse"Engine with a cylinder head
munie d'un tube porte-injecteur fretté" L'invention concerne un moteur thermique de type dit "à injection directe" pour un véhicule automobile. The invention relates to a heat engine of the type called "direct injection" for a motor vehicle.
L'invention concerne plus particulièrement un moteur thermique de type à injection directe pour un véhicule automobile, du type qui comporte une culasse qui est traversée par au moins un perçage dans lequel est agencé un injecteur sensiblement cylindrique dont l'extrémité inférieure débouche dans une io chambre de combustion du moteur et dont au moins une partie intermédiaire est reçue de manière étanche dans un tube coaxial qui est reçu dans le perçage et qui traverse une cavité de circulation de liquide de refroidissement de la culasse, ledit tube comportant, de part et d'autre de la cavité, une extrémité inférieure coaxiale qui est fixée par frettage dans une portée cylindrique inférieure associée du perçage de la culasse, et une extrémité supérieure qui est reçue dans une portée cylindrique supérieure du perçage de la culasse. The invention more particularly relates to a direct injection type heat engine for a motor vehicle, of the type which comprises a cylinder head which is traversed by at least one bore in which is arranged a substantially cylindrical injector whose lower end opens into a port. combustion chamber of the engine and of which at least an intermediate portion is sealingly received in a coaxial tube which is received in the borehole and which passes through a coolant circulation cavity of the cylinder head, said tube comprising, on both sides, another of the cavity, a coaxial lower end which is hoopably secured in an associated lower cylindrical bearing surface of the cylinder head bore, and an upper end which is received in an upper cylindrical bearing surface of the cylinder head bore.
On connaît de nombreux exemples de moteurs thermiques 20 de ce type. Many examples of heat engines 20 of this type are known.
En particulier, les moteurs thermiques qui comportent un injecteur placé en position centrale, et une cavité de circulation de liquide de refroidissement de la culasse, nécessitent, pour que le refroidissement de la culasse s'effectue correctement, une disposition de l'injecteur dans laquelle il traverse ladite cavité de circulation de liquide de refroidissement. In particular, the thermal engines which comprise an injector placed in central position, and a cylinder head coolant circulation cavity, require, for the cooling of the cylinder head is carried out correctly, a provision of the injector in which it passes through said coolant circulation cavity.
Il n'est évidemment pas question d'immerger l'injecteur, et à cet effet, la culasse comporte donc un guide interne rapporté qui traverse de manière étanche la cavité de circulation de liquide de refroidissement et qui est traversé par l'injecteur. It is obviously not a question of immersing the injector, and for this purpose, the yoke therefore comprises an internal guide attached which passes through the sealing cavity of the coolant liquid and which is traversed by the injector.
Le document US-3.945.353, par exemple, décrit et représente une telle configuration. US-3,945,353, for example, describes and represents such a configuration.
Dans une telle configuration, le guide interne est formé d'un tube qui est introduit par l'extrémité supérieure du perçage de la culasse, et qui est fretté dans une portée cylindrique inférieure associée du perçage de la culasse. L'extrémité supérieure du guide, cylindrique, est reçue dans une portée cylindrique supérieure associée du perçage de la culasse et au moins un joint torique est interposé entre l'extrémité supérieure du guide et ladite portée cylindrique supérieure pour assurer l'étanchéité du guide tubulaire. In such a configuration, the inner guide is formed of a tube which is introduced through the upper end of the bolt hole, and which is engaged in an associated lower cylindrical bearing surface of the bolt hole. The upper end of the guide, cylindrical, is received in an associated upper cylindrical bearing surface of the cylinder head and at least one O-ring is interposed between the upper end of the guide and said upper cylindrical seat to seal the tubular guide .
L'inconvénient majeur de cette conception est le coût prohibitif du montage du guide tubulaire à l'aide des joints io toriques. The major disadvantage of this design is the prohibitive cost of mounting the tubular guide with io ring seals.
Pour remédier à cet inconvénient, l'invention propose une nouvelle conception de moteur thermique dans laquelle le guide tubulaire est monté sans joints toriques. To overcome this drawback, the invention proposes a new thermal engine design in which the tubular guide is mounted without O-rings.
Dans ce but, l'invention propose un moteur du type décrit précédemment, caractérisé en ce que l'extrémité supérieure du tube est fixée par frettage dans la portée cylindrique supérieure du perçage de la culasse. For this purpose, the invention provides a motor of the type described above, characterized in that the upper end of the tube is fixed by hooping in the upper cylindrical scope of the bore of the cylinder head.
Selon d'autres caractéristiques de l'invention: - l'extrémité supérieure du tube comporte une portée tronconique qui est destinée à coopérer avec la paroi interne de la portée cylindrique supérieure pour immobiliser l'extrémité supérieure du tube par frettage, - la portée tronconique du tube est de conicité réduite, - le perçage de la culasse comporte un chanfrein d'introduction agencé au dessus de sa portée cylindrique supérieure, - le tube et la culasse sont réalisés en aluminium. According to other characteristics of the invention: the upper end of the tube comprises a frustoconical bearing which is intended to cooperate with the inner wall of the upper cylindrical bearing surface to immobilize the upper end of the tube by shrinking, - the frustoconical bearing surface the tube is of reduced conicity, - the bore of the cylinder head comprises an introduction chamfer arranged above its upper cylindrical bearing, - the tube and the cylinder head are made of aluminum.
L'invention concerne aussi un procédé de montage pour un tube dans une culasse d'un moteur thermique du type décrit précédemment, caractérisé en ce qu'il comporte au moins une première étape au cours de laquelle le tube est introduit par une extrémité supérieure du perçage de la culasse et une deuxième étape au cours de laquelle il est emmanché à force dans le perçage jusqu'à ce que ses extrémités supérieure et inférieure soient frettées dans les portées cylindriques supérieure et inférieure du perçage de la culasse. The invention also relates to a mounting method for a tube in a cylinder head of a heat engine of the type described above, characterized in that it comprises at least a first step during which the tube is introduced through an upper end of the drilling the cylinder head and a second step in which it is force-fitted into the bore until its upper and lower ends are hooped in the upper and lower cylindrical bearings of the bore of the cylinder head.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels: - la figure 1 est une vue schématique en coupe d'une culasse pour un moteur selon l'invention représentée avec le tube monté ; io - la figure 2 est une vue schématique en coupe de détail du tube; - la figure 3 est une vue schématique d'une culasse pour un moteur selon l'invention représentant le tube au cours de son montage dans la culasse. Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the accompanying drawings in which: - Figure 1 is a schematic sectional view of a cylinder head for a motor according to the invention shown with the tube mounted; Figure 2 is a schematic sectional view of the detail of the tube; - Figure 3 is a schematic view of a cylinder head for an engine according to the invention showing the tube during its assembly in the cylinder head.
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires. In the following description, like reference numerals designate like parts or having similar functions.
On a représenté à la figure 1 une culasse 10 pour une moteur thermique (non représenté) de véhicule automobile de type dit "à injection directe", c'est à dire comportant un injecteur débouchant directement dans la chambre de combustion du moteur. FIG. 1 shows a cylinder head 10 for a heat engine (not shown) of a motor vehicle of the so-called "direct injection" type, ie having an injector opening directly into the combustion chamber of the engine.
De manière connue, la culasse 10 est traversée par au moins un perçage 12 dans lequel est agencé un injecteur 14 sensiblement cylindrique dont l'extrémité inférieure 16 débouche dans une face inférieure 18 de la culasse communiquant avec une chambre de combustion (non représentée) du moteur. In known manner, the yoke 10 is traversed by at least one bore 12 in which is arranged a substantially cylindrical injector 14 whose lower end 16 opens into a lower face 18 of the yoke communicating with a combustion chamber (not shown) of the engine.
Au moins une partie intermédiaire 20 de l'injecteur 14 est reçue de manière étanche dans un tube 22 coaxial qui est reçu dans le perçage 12 et qui traverse une cavité 24 de circulation de liquide de refroidissement de la culasse 10. At least an intermediate portion 20 of the injector 14 is sealingly received in a coaxial tube 22 which is received in the bore 12 and which passes through a cavity 24 for circulating the cooling liquid of the cylinder head 10.
De manière connue, le tube 22 comporte, de part et d'autre de la cavité 24, une extrémité inférieure 26 coaxiale qui est fixée par frettage dans une portée cylindrique 28 inférieure associée du perçage 12 de la culasse 10, et une extrémité supérieure 30 qui est reçue dans une portée cylindrique 32 supérieure du perçage 12 de la culasse 10. In known manner, the tube 22 comprises, on either side of the cavity 24, a coaxial lower end 26 which is fixed by hooping in an associated lower cylindrical surface 28 of the bore 12 of the yoke 10, and an upper end 30. which is received in a cylindrical bearing surface 32 of the bore 12 of the cylinder head 10.
Conventionnellement, le tube 22 n'est fixé par frettage s dans la culasse 10 qu'à son extrémité inférieure 26, l'extrémité supérieure 30 du tube étant fixée dans la portée cylindrique 32 supérieure du perçage 12 de la culasse 10 par l'intermédiaire d'un ou plusieurs joints toriques. Conventionally, the tube 22 is fastened by hooping s in the cylinder head 10 at its lower end 26, the upper end 30 of the tube being fixed in the cylindrical bearing surface 32 of the bore 12 of the cylinder head 10 via one or more O-rings.
Cette conception présente l'inconvénient de nécessiter une io fixation de l'extrémité supérieure 30 du tube 22 dans la portée cylindrique 32 supérieure du perçage 12 qui est réalisée conventionnellement' par l'intermédiaire d'éléments concentriques (non représentés) qui sont interposés entre l'extrémité supérieure 30 du tube 22 et dans la portée cylindrique 32 supérieure 12 et qui comportent des joints toriques (non représentés) pour assurer l'étanchéité du perçage 12 au liquide de refroidissement contenu dans la cavité 24 de circulation de liquide de refroidissement de la culasse. This design has the disadvantage of requiring attachment of the upper end 30 of the tube 22 in the upper cylindrical surface 32 of the bore 12 which is conventionally formed by means of concentric elements (not shown) which are interposed between the upper end 30 of the tube 22 and in the upper cylindrical surface 32 and which comprise O-rings (not shown) to seal the bore 12 to the coolant contained in the cavity 24 of coolant circulation of the breech.
Cette conception impose donc le respect de tolérances de concentricité élevées entre le tube 22 et la portée cylindrique 32 supérieure du perçage 12. Par ailleurs la présence d'un joint torique rend cette conception coûteuse. This design therefore requires compliance with high concentricity tolerances between the tube 22 and the cylindrical bearing surface 32 of the bore 12. Moreover, the presence of an O-ring makes this design expensive.
Pour remédier à cet inconvénient, l'invention propose une nouvelle conception dépourvue de joint torique. To remedy this drawback, the invention proposes a new design devoid of O-ring.
Dans ce but, comme l'illustre la figure 1, l'invention propose un moteur thermique du type décrit précédemment, caractérisé en ce que l'extrémité 30 supérieure du tube 22 est fixée par frettage dans la portée 32 cylindrique supérieure du perçage 12 de la culasse 10. For this purpose, as illustrated in FIG. 1, the invention proposes a heat engine of the type described above, characterized in that the upper end of the tube 22 is fixed by hooping in the upper cylindrical bearing surface 32 of the bore 12 of FIG. the breech 10.
Plus particulièrement, comme l'illustre la figure 2 l'extrémité supérieure 30 du tube 22 comporte une portée 34 tronconique qui est destinée à coopérer avec la paroi interne de la portée 32 cylindrique supérieure pour immobiliser l'extrémité supérieure 30 du tube par frettage. More particularly, as illustrated in Figure 2 the upper end 30 of the tube 22 has a frustoconical surface 34 which is intended to cooperate with the inner wall of the upper cylindrical surface 32 to immobilize the upper end 30 of the tube by hooping.
Dans le mode de réalisation préféré de l'invention, cette portée 34 tronconique est de conicité "a" réduite. En effet, l'extrémité supérieure 30 du tube 22 est destinée à être montée à force dans la portée cylindrique 32, et la conicité "a" réduite de la portée tronconique 34 permet d'obtenir une légère déformation de la portée tronconique 34 lors de l'insertion de l'extrémité supérieure 30 du tube 22 dans la portée cylindrique 32. Cette légère déformation est à même de garantir l'étanchéité du tube 22 au liquide de refroidissement lors de l'emmanchement du tube 22. In the preferred embodiment of the invention, this frustoconical surface 34 has a reduced taper "a". Indeed, the upper end 30 of the tube 22 is intended to be forcibly mounted in the cylindrical seat 32, and the reduced conicity "a" of the frustoconical bearing surface 34 makes it possible to obtain a slight deformation of the frustoconical bearing surface 34 during the insertion of the upper end 30 of the tube 22 into the cylindrical seat 32. This slight deformation is able to guarantee the sealing of the tube 22 to the coolant during the fitting of the tube 22.
io Avantageusement, comme l'illustre la figure 3, le perçage 12 de la culasse 10 comporte un chanfrein 38 d'introduction qui est agencé au dessus de sa portée 32 cylindrique supérieure pour faciliter l'introduction du tube 22. Advantageously, as illustrated in FIG. 3, the bore 12 of the yoke 10 includes an insertion chamfer 38 which is arranged above its upper cylindrical bearing surface 32 to facilitate the introduction of the tube 22.
Pour garantir une bonne déformation de la portée tronconique 34 ainsi qu'une bonne étanchéité entre le tube 22 et la culasse 10, le tube 22 et la culasse 10 sont avantageusement réalisés en aluminium. Cette caractéristique garantit une déformation adéquate des matériaux lors de l'emmanchement du tube 22. To ensure good deformation of the frustoconical surface 34 and a good seal between the tube 22 and the cylinder head 10, the tube 22 and the cylinder head 10 are advantageously made of aluminum. This characteristic guarantees an adequate deformation of the materials during fitting of the tube 22.
Dans cette configuration, le tube 22 peut être monté dans l'alésage 14 selon un procédé très simple, comme représenté à la figure 3. Au cours d'une première étape, on introduit le tube par une extrémité supérieure 36 du perçage 12 de la culasse 10. In this configuration, the tube 22 can be mounted in the bore 14 in a very simple process, as shown in FIG. 3. During a first step, the tube is introduced through an upper end 36 of the bore 12 of the cylinder head 10.
Puis, au cours d'une deuxième étape, le tube 22 est emmanché à force, par exemple au moyen d'une presse, dans le perçage 12 jusqu'à ce que ses extrémités supérieure 30 et inférieure 26 soient frettées dans les portées cylindriques supérieure 32 et inférieure 28 du perçage 12 de la culasse 10. Le tube 22 permet alors le montage de l'injecteur 14 dans la culasse 10 et il garantit l'étanchéité du perçage 12 au liquide de refroidissement circulant dans la cavité 24. Then, during a second step, the tube 22 is force-fitted, for example by means of a press, into the bore 12 until its upper and lower ends 26 are fretted in the upper cylindrical bearing surfaces 32 and lower 28 of the bore 12 of the cylinder head 10. The tube 22 then allows the mounting of the injector 14 in the cylinder head 10 and it ensures the sealing of the bore 12 to the coolant circulating in the cavity 24.
L'invention propose donc un montage simple et efficace permettant l'implantation, au travers d'une cavité 24 de circulation d'eau, d'un injecteur 20 dans une culasse 10. The invention thus proposes a simple and effective assembly allowing the implantation, through a cavity 24 of circulation of water, of an injector 20 in a cylinder head 10.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0452155A FR2875862B1 (en) | 2004-09-24 | 2004-09-24 | THERMAL MOTOR COMPRISING A CYLINDER HEAD WITH A FREQUENT INJECTOR TUBE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0452155A FR2875862B1 (en) | 2004-09-24 | 2004-09-24 | THERMAL MOTOR COMPRISING A CYLINDER HEAD WITH A FREQUENT INJECTOR TUBE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2875862A1 true FR2875862A1 (en) | 2006-03-31 |
| FR2875862B1 FR2875862B1 (en) | 2006-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0452155A Active FR2875862B1 (en) | 2004-09-24 | 2004-09-24 | THERMAL MOTOR COMPRISING A CYLINDER HEAD WITH A FREQUENT INJECTOR TUBE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2875862B1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1837517A1 (en) * | 2006-03-23 | 2007-09-26 | Delphi Technologies, Inc. | Injector mounting arrangement |
| FR2909136A3 (en) * | 2006-11-23 | 2008-05-30 | Renault Sas | Direct injection type heat engine cylinder head for motor vehicle, has injector with end emerged in chamber, and tube with ring clipped in slot defined in boring, where ring has pins penetrating inside ring when tube is set in cylinder head |
| FR2909417A3 (en) * | 2006-12-01 | 2008-06-06 | Renault Sas | Internal combustion engine's e.g. direct injection type heat engine, cylinder head for motor vehicle, has dismountable axial stopper inserted in part in groove formed in bore after assembly of tube in cylinder head |
| FR2910064A3 (en) * | 2006-12-14 | 2008-06-20 | Renault Sas | Cylinder head for direct injection type internal combustion engine of motor vehicle, has coaxial injecting tube comprising deformable cylindrical sections respectively extending below and above middle cylindrical support of bore |
| FR2925599A3 (en) * | 2007-12-19 | 2009-06-26 | Renault Sas | Internal combustion engine i.e. direct injection type internal combustion engine, has cylinder head including tube locked against side of head by cover, where upper end surface is found in plane of machined upper surface of head |
| WO2016206835A1 (en) * | 2015-06-25 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector and method for mounting a fuel injector |
| DE102022000302A1 (en) | 2022-01-27 | 2023-07-27 | Deutz Aktiengesellschaft | Cylinder head for an internal combustion engine with a combustion chamber and the use of a sealing sleeve for sealing a cylinder head |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3125078A (en) * | 1964-03-17 | Fuel supply system | ||
| US3945353A (en) | 1974-11-29 | 1976-03-23 | Allis-Chalmers Corporation | Two phase nozzle cooling system |
| US4066213A (en) * | 1976-04-16 | 1978-01-03 | Deere & Company | Fuel injection nozzle assembly |
| JPH10176627A (en) * | 1996-12-18 | 1998-06-30 | Isuzu Motors Ltd | Mounting structure for fuel injection nozzle |
| US5784783A (en) * | 1996-04-18 | 1998-07-28 | Carpenter; Donald L. | Method of removing an injector sleeve |
| US6112722A (en) * | 1998-06-19 | 2000-09-05 | Cummins Engine, Co. | Fuel injector seat assembly with positive contact seal between fuel injector sleeve and cylinder head |
-
2004
- 2004-09-24 FR FR0452155A patent/FR2875862B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3125078A (en) * | 1964-03-17 | Fuel supply system | ||
| US3945353A (en) | 1974-11-29 | 1976-03-23 | Allis-Chalmers Corporation | Two phase nozzle cooling system |
| US4066213A (en) * | 1976-04-16 | 1978-01-03 | Deere & Company | Fuel injection nozzle assembly |
| US5784783A (en) * | 1996-04-18 | 1998-07-28 | Carpenter; Donald L. | Method of removing an injector sleeve |
| JPH10176627A (en) * | 1996-12-18 | 1998-06-30 | Isuzu Motors Ltd | Mounting structure for fuel injection nozzle |
| US6112722A (en) * | 1998-06-19 | 2000-09-05 | Cummins Engine, Co. | Fuel injector seat assembly with positive contact seal between fuel injector sleeve and cylinder head |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1837517A1 (en) * | 2006-03-23 | 2007-09-26 | Delphi Technologies, Inc. | Injector mounting arrangement |
| US7735474B2 (en) | 2006-03-23 | 2010-06-15 | Delphi Technologies, Inc. | Injector mounting arrangement |
| FR2909136A3 (en) * | 2006-11-23 | 2008-05-30 | Renault Sas | Direct injection type heat engine cylinder head for motor vehicle, has injector with end emerged in chamber, and tube with ring clipped in slot defined in boring, where ring has pins penetrating inside ring when tube is set in cylinder head |
| FR2909417A3 (en) * | 2006-12-01 | 2008-06-06 | Renault Sas | Internal combustion engine's e.g. direct injection type heat engine, cylinder head for motor vehicle, has dismountable axial stopper inserted in part in groove formed in bore after assembly of tube in cylinder head |
| FR2910064A3 (en) * | 2006-12-14 | 2008-06-20 | Renault Sas | Cylinder head for direct injection type internal combustion engine of motor vehicle, has coaxial injecting tube comprising deformable cylindrical sections respectively extending below and above middle cylindrical support of bore |
| FR2925599A3 (en) * | 2007-12-19 | 2009-06-26 | Renault Sas | Internal combustion engine i.e. direct injection type internal combustion engine, has cylinder head including tube locked against side of head by cover, where upper end surface is found in plane of machined upper surface of head |
| WO2016206835A1 (en) * | 2015-06-25 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector and method for mounting a fuel injector |
| DE102022000302A1 (en) | 2022-01-27 | 2023-07-27 | Deutz Aktiengesellschaft | Cylinder head for an internal combustion engine with a combustion chamber and the use of a sealing sleeve for sealing a cylinder head |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2875862B1 (en) | 2006-11-24 |
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| FR2901324A1 (en) | Injector mounting arrangement for cylinder head of motor vehicle engine, has injector inserted in tube in sealed manner, where tube extends from upper wall to lower wall and has end screwed in upper wall of cylinder head |
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