FR2836697A1 - I.C. engine cylinder head comprises injector shaft discharging through bore receiving injector nose - Google Patents
I.C. engine cylinder head comprises injector shaft discharging through bore receiving injector nose Download PDFInfo
- Publication number
- FR2836697A1 FR2836697A1 FR0202637A FR0202637A FR2836697A1 FR 2836697 A1 FR2836697 A1 FR 2836697A1 FR 0202637 A FR0202637 A FR 0202637A FR 0202637 A FR0202637 A FR 0202637A FR 2836697 A1 FR2836697 A1 FR 2836697A1
- Authority
- FR
- France
- Prior art keywords
- cylinder head
- injector
- nose
- engine cylinder
- head comprises
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/242—Arrangement of spark plugs or injectors
Abstract
Description
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La présente invention se rapporte à une culasse de moteur à combustion interne, et à un moteur équipé d'une telle culasse. The present invention relates to an internal combustion engine cylinder head, and to an engine equipped with such a cylinder head.
On connaît de la technique antérieure une culasse de moteur à combustion interne du type comprenant au moins un puits d'injecteur débouchant sur la face feu de ladite culasse par un alésage destiné à recevoir un nez d'injecteur. There is known from the prior art an internal combustion engine cylinder head of the type comprising at least one injector well opening onto the fire face of said cylinder head by a bore intended to receive an injector nose.
Le puits d'injecteur est destiné à recevoir un injecteur de carburant, adapté pour injecter par son nez du carburant dans une chambre de combustion dans laquelle se meut un piston. The injector well is intended to receive a fuel injector, adapted to inject fuel through its nose into a combustion chamber in which a piston moves.
Pour obtenir le meilleur compromis possible entre les performances du moteur (rendement énergétique) et la qualité de ses émissions (gaz d'échappement), on a pu constater qu'il pouvait s'avérer nécessaire d'une part de faire déboucher le nez d'injecteur le plus haut possible dans la chambre de combustion et d'autre part d'augmenter l'angle d'ouverture de la nappe de carburant sortant de ce nez. To obtain the best possible compromise between engine performance (fuel efficiency) and the quality of its emissions (exhaust gas), we have seen that it may be necessary on the one hand to clear the nose of injector as high as possible in the combustion chamber and on the other hand to increase the opening angle of the fuel sheet leaving this nose.
Pour satisfaire à la première de ces conditions, on a ainsi été amené à limiter le dépassement du nez de l'injecteur par rapport à la face feu de la culasse, voire même à placer l'injecteur de manière que son nez soit situé légèrement en retrait par rapport à cette face feu. To satisfy the first of these conditions, it has thus been necessary to limit the protrusion of the injector nose relative to the fire face of the cylinder head, or even to place the injector so that its nose is located slightly in withdrawal from this fire face.
On s'est cependant rendu compte qu'un dépassement insuffisant du nez de l'injecteur par rapport à la face feu de la culasse et/ou un angle d'ouverture trop important de la nappe de carburant sortant de ce nez, pouvaient conduire à des interférences de cette nappe avec la culasse. However, it has been realized that an insufficient protrusion of the injector nose relative to the fire face of the cylinder head and / or an excessively large opening angle of the sheet of fuel leaving this nose, could lead to interference of this layer with the cylinder head.
De telles interférences sont susceptibles de destructurer la nappe de carburant à l'intérieur de la chambre de combustion, et ainsi d'annuler tout le bénéfice que l'on souhaite tirer du positionnement judicieux de Such interference is likely to destroy the fuel sheet inside the combustion chamber, and thus cancel out all the benefit that one wishes to derive from the judicious positioning of
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l'injecteur et du réglage approprié de l'angle d'ouverture de la nappe de carburant. the injector and the appropriate setting of the opening angle of the fuel table.
La présente invention a pour but de s'affranchir de telles interférences. The object of the present invention is to overcome such interference.
On atteint ce but de l'invention avec une culasse de moteur à combustion interne du type comprenant au moins un puits d'injecteur débouchant sur la face feu de ladite culasse par un alésage destiné à recevoir un nez d'injecteur, remarquable en ce que ledit alésage débouche sur ladite face feu par une zone élargie. This object of the invention is achieved with an internal combustion engine cylinder head of the type comprising at least one injector well opening onto the fire face of said cylinder head by a bore intended to receive an injector nose, remarkable in that said bore opens on said fire face by an enlarged zone.
Grâce à cet élargissement, on peut éviter que la nappe de carburant interfère avec la culasse lorsque le nez d'injecteur est placé haut dans la chambre de combustion et/ou lorsque la nappe de carburant présente un angle d'ouverture important. Thanks to this enlargement, it is possible to prevent the fuel sheet from interfering with the cylinder head when the injector nose is placed high in the combustion chamber and / or when the fuel sheet has a large opening angle.
Suivant d'autres caractéristiques de la culasse selon l'invention : ladite zone élargie est tronconique, ladite zone élargie est cylindrique. According to other characteristics of the cylinder head according to the invention: said enlarged zone is frustoconical, said enlarged zone is cylindrical.
La présente invention se rapporte également à un moteur à combustion interne équipé d'une culasse conforme à ce qui précède. The present invention also relates to an internal combustion engine equipped with a cylinder head in accordance with the above.
D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description qui va suivre et à l'examen du dessin annexé dont l'unique figure est une vue en coupe selon l'axe d'un puits d'injecteur d'une partie d'une culasse selon l'invention. Other characteristics and advantages of the present invention will become apparent on reading the description which follows and on examining the appended drawing, the only figure of which is a sectional view along the axis of an injector well. 'part of a cylinder head according to the invention.
On se reporte à cette figure, sur laquelle on voit une partie de culasse 1 selon l'invention, comprenant un puits d'injecteur 3 dans lequel est disposé un injecteur 5 d'un type connu en soi. Referring to this figure, on which there is seen a cylinder head part 1 according to the invention, comprising an injector well 3 in which is disposed an injector 5 of a type known per se.
Le puits 3 comprend un alésage de diamètre relativement faible 7 destiné à recevoir une partie correspondante d'extrémité 9 de l'injecteur 5, encore appelée nez d'injecteur. The well 3 comprises a bore of relatively small diameter 7 intended to receive a corresponding end portion 9 of the injector 5, also called the injector nose.
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C'est par l'extrémité 11 de ce nez 9 qu'une nappe de carburant 13 peut être envoyée sous pression à l'intérieur de la chambre de combustion associée 15, dans laquelle se déplace un piston 17 dont le dessus présente une forme appropriée connue en soi. It is through the end 11 of this nose 9 that a fuel sheet 13 can be sent under pressure inside the associated combustion chamber 15, in which a piston 17 moves, the top of which has an appropriate shape. known per se.
Comme cela est visible, l'alésage 7 du puits 3 débouche sur la face feu 19 de la culasse 1, c'est-à-dire sur la face de cette culasse qui ferme la chambre de combustion 15, en s'élargissant. As is visible, the bore 7 of the well 3 opens onto the fire face 19 of the cylinder head 1, that is to say on the face of this cylinder head which closes the combustion chamber 15, widening.
Cette zone élargie 16 peut être tronconique et coaxiale avec le puits 3, comme cela est représenté. This enlarged area 16 can be frustoconical and coaxial with the well 3, as shown.
Les avantages d'un tel élargissement découlent directement de la description qui précède. The advantages of such an extension flow directly from the foregoing description.
Lorsqu'on place l'injecteur 5 dans le puits 3 de manière que son nez 9 dépasse peu, voire se trouve en retrait par rapport à la face feu 19 de la culasse 1, comme cela est représenté sur la figure, la zone élargie 16 permet d'éviter que la nappe de carburant 13 ne touche les bords du puits 3, même si l'angle d'ouverture a ce cette nappe est important. When the injector 5 is placed in the well 3 so that its nose 9 protrudes little, or even is set back relative to the fire face 19 of the cylinder head 1, as shown in the figure, the enlarged zone 16 makes it possible to prevent the fuel ply 13 from touching the edges of the well 3, even if the opening angle to this ply is large.
On comprend donc que la culasse selon l'invention permet d'avoir un nez d'injecteur placé haut dans la chambre de combustion et/ou un angle d'ouverture de nappe important sans que cette nappe interfère avec la culasse. It is therefore understood that the cylinder head according to the invention makes it possible to have an injector nose placed high in the combustion chamber and / or a large angle of opening of the ply without this ply interfering with the cylinder head.
On peut de la sorte d'améliorer nettement les performances du moteur à combustion et la qualité de ses émissions par rapport à la technique antérieure. This can significantly improve the performance of the combustion engine and the quality of its emissions compared to the prior art.
On notera en outre que la culasse selon l'invention permet d'obtenir une plus grande tolérance sur les variations autour d'une position nominale du nez 9, lors de la fabrication : si ce nez se trouve légèrement trop en retrait à l'intérieur du puits 3, la zone élargie 16 permet d'éviter malgré tout que la nappe de carburant 13 n'interfère avec les bords du puits. It will also be noted that the cylinder head according to the invention makes it possible to obtain a greater tolerance on the variations around a nominal position of the nose 9, during manufacture: if this nose is slightly too far back inside of the well 3, the enlarged zone 16 makes it possible to prevent, in spite of everything, the fuel sheet 13 from interfering with the edges of the well.
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On notera également que la culasse selon l'invention peut être obtenue en modifiant à peine une culasse classique. It will also be noted that the cylinder head according to the invention can be obtained by barely modifying a conventional cylinder head.
Bien entendu, la présente invention n'est pas limitée au mode de réalisation décrit et représenté, fourni à titre d'exemple illustratif et non limitatif. Of course, the present invention is not limited to the embodiment described and shown, provided by way of illustrative and nonlimiting example.
C'est ainsi par exemple que la zone élargie 16 pourrait être cylindrique, par exemple. Thus, for example, the enlarged zone 16 could be cylindrical, for example.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0202637A FR2836697B1 (en) | 2002-03-01 | 2002-03-01 | CYLINDER HEAD OF INTERNAL COMBUSTION ENGINE, AND ENGINE EQUIPPED WITH SUCH CYLINDER HEAD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0202637A FR2836697B1 (en) | 2002-03-01 | 2002-03-01 | CYLINDER HEAD OF INTERNAL COMBUSTION ENGINE, AND ENGINE EQUIPPED WITH SUCH CYLINDER HEAD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2836697A1 true FR2836697A1 (en) | 2003-09-05 |
| FR2836697B1 FR2836697B1 (en) | 2004-10-15 |
Family
ID=27741372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0202637A Expired - Fee Related FR2836697B1 (en) | 2002-03-01 | 2002-03-01 | CYLINDER HEAD OF INTERNAL COMBUSTION ENGINE, AND ENGINE EQUIPPED WITH SUCH CYLINDER HEAD |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2836697B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2885391A1 (en) * | 2005-05-09 | 2006-11-10 | Renault Sas | Diesel direct injection internal combustion engine for motor vehicle, has cylindrical head provided with housing in its upper surface with respect to piston, and groove and boss regulated according to desired swirl effect of intake gas load |
| WO2008110404A1 (en) * | 2007-03-15 | 2008-09-18 | Continental Automotive Gmbh | Cylinder head for internal combustion engines and internal combustion engines having such a cylinder head |
| DE102012002897A1 (en) * | 2012-02-14 | 2013-08-14 | Daimler Ag | Internal combustion engine, in particular for a motor vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5335635A (en) * | 1992-07-22 | 1994-08-09 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber for an internal combustion engine |
| EP0839997A1 (en) * | 1996-10-31 | 1998-05-06 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber structure having piston cavity |
| JPH10131757A (en) * | 1996-10-31 | 1998-05-19 | Fuji Heavy Ind Ltd | Inner-cylinder injection type engine |
| US6170457B1 (en) * | 1998-09-01 | 2001-01-09 | Outboard Marine Corporation | Fuel injection engine having fuel spray deflector |
-
2002
- 2002-03-01 FR FR0202637A patent/FR2836697B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5335635A (en) * | 1992-07-22 | 1994-08-09 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber for an internal combustion engine |
| EP0839997A1 (en) * | 1996-10-31 | 1998-05-06 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber structure having piston cavity |
| JPH10131757A (en) * | 1996-10-31 | 1998-05-19 | Fuji Heavy Ind Ltd | Inner-cylinder injection type engine |
| US6170457B1 (en) * | 1998-09-01 | 2001-01-09 | Outboard Marine Corporation | Fuel injection engine having fuel spray deflector |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1998, no. 10 31 August 1998 (1998-08-31) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2885391A1 (en) * | 2005-05-09 | 2006-11-10 | Renault Sas | Diesel direct injection internal combustion engine for motor vehicle, has cylindrical head provided with housing in its upper surface with respect to piston, and groove and boss regulated according to desired swirl effect of intake gas load |
| WO2008110404A1 (en) * | 2007-03-15 | 2008-09-18 | Continental Automotive Gmbh | Cylinder head for internal combustion engines and internal combustion engines having such a cylinder head |
| DE102007012508A1 (en) * | 2007-03-15 | 2008-09-25 | Continental Automotive Gmbh | Cylinder head for internal combustion engines and internal combustion engines with such a cylinder head |
| DE102012002897A1 (en) * | 2012-02-14 | 2013-08-14 | Daimler Ag | Internal combustion engine, in particular for a motor vehicle |
| CN104114829A (en) * | 2012-02-14 | 2014-10-22 | 戴姆勒股份公司 | Internal combustion engine, in particular for a motor vehicle, and a method for operating such an internal combustion engine |
| DE102012002897B4 (en) * | 2012-02-14 | 2016-02-11 | Daimler Ag | Internal combustion engine, in particular for a motor vehicle |
| US9605585B2 (en) | 2012-02-14 | 2017-03-28 | Daimler Ag | Internal combustion engine, in particular for a motor vehicle, and a method for operating such an internal combustion engine |
| CN104114829B (en) * | 2012-02-14 | 2017-08-22 | 戴姆勒股份公司 | Internal combustion engine particularly for vehicle and the method for running this internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2836697B1 (en) | 2004-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TP | Transmission of property | ||
| ST | Notification of lapse |
Effective date: 20071130 |