FR2880915A1 - Diesel internal combustion engine, has cylinder head and piston`s bowl that are provided in combustion chamber and comprise duct shaped part with converging part followed by divergent part to form critical orifice - Google Patents
Diesel internal combustion engine, has cylinder head and piston`s bowl that are provided in combustion chamber and comprise duct shaped part with converging part followed by divergent part to form critical orifice Download PDFInfo
- Publication number
- FR2880915A1 FR2880915A1 FR0500578A FR0500578A FR2880915A1 FR 2880915 A1 FR2880915 A1 FR 2880915A1 FR 0500578 A FR0500578 A FR 0500578A FR 0500578 A FR0500578 A FR 0500578A FR 2880915 A1 FR2880915 A1 FR 2880915A1
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- Prior art keywords
- cylinder head
- fuel
- chamber
- bowl
- piston
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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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/063—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion the combustion space in the piston interacting fluid dynamically with the cylinder head, the injector body or the cylinder wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0678—Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
- F02B23/0684—Ring like bowl, e.g. toroidal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0696—W-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0645—Details related to the fuel injector or the fuel spray
- F02B23/0669—Details related to the fuel injector or the fuel spray having multiple fuel spray jets per injector nozzle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
2880915 12880915 1
MOTEUR DIESEL A COMBUSTION INTERNE A CHAMBRE DE COMBUSTION PRESENTANT UNE FORME DE TYPE "COL SONIQUE" L'invention concerne un moteur diesel à combustion interne à chambre de combustion présentant une forme de type "col sonique". FIELD OF THE INVENTION The invention relates to a combustion chamber internal combustion diesel engine having a "sonic neck" type shape.
L'invention concerne plus particulièrement les moteurs diesel à injection directe. The invention relates more particularly to direct injection diesel engines.
Dans les nouveaux systèmes d'injection adoptés sur les moteurs diesel à injection directe, les pressions d'injection de carburant sont de plus en plus élevées. Associées à des coefficients de débit des trous d'injection de carburant plus élevés, ces pressions élevées entraînent des pénétrations importantes des jets de carburant dans la chambre de combustion. Or, un contact prématuré du carburant sur les parois de la chambre de combustion, notamment sur les parois du bol usiné dans la tête du piston, ne permet pas un mélange optimal air/ carburant et conduit à une augmentation des émissions de suies et d'hydrocarbures imbrûlés. Afin d'éviter un tel contact, il est alors nécessaire d'augmenter le diamètre des chambres de combustion afin d'augmenter la distance entre la sortie du trou d'injecteur et la paroi. Cette solution n'est toutefois pas satisfaisante pour les moteurs à petits alésages, pour lesquels le diamètre maximal de bol est relativement faible. De plus, à volume constant du bol, l'augmentation du diamètre du bol conduit à une réduction de sa profondeur: il n'est dès lors plus possible d'augmenter le diamètre du bol lorsque la profondeur minimale, nécessaire pour assurer une bonne combustion en évitant le contact entre le jet de carburant et le fond du bol, a été atteinte. In the new injection systems adopted on direct injection diesel engines, fuel injection pressures are becoming higher. Associated with higher fuel-injection-hole flow coefficients, these high pressures result in significant penetration of the fuel jets into the combustion chamber. However, premature contact of the fuel on the walls of the combustion chamber, in particular on the walls of the bolus machined in the piston head, does not allow an optimal air / fuel mixture and leads to an increase in the emissions of soot and unburned hydrocarbons. In order to avoid such contact, it is then necessary to increase the diameter of the combustion chambers in order to increase the distance between the outlet of the injector hole and the wall. This solution is however not satisfactory for small bore engines, for which the maximum bowl diameter is relatively small. In addition, at constant volume of the bowl, the increase in the diameter of the bowl leads to a reduction in its depth: it is no longer possible to increase the diameter of the bowl when the minimum depth necessary to ensure good combustion avoiding contact between the fuel jet and the bottom of the bowl, has been reached.
Par ailleurs, au cours de la combustion, le mélange air/ carburant au moment de l'auto-inflammation n'est pas homogène, en particulier lorsque la charge du moteur est élevée, car la combustion de diffusion est alors de plus en plus importante. Le jet de carburant n'a pas eu le temps de se vaporiser qu'il subit déjà une forte température environnante. Ce phénomène conduit à une cokéfaction du carburant qui se retrouve sous forme d'émissions de suies. Les solutions actuelles consistent à homogénéiser davantage le mélange en favorisant la phase de pré-mélange par rapport à la phase de diffusion, par exemple en brûlant toute la masse de carburant introduite dans la phase de pré-mélange. Ceci permet de supprimer les émissions de suies, mais ce type de fonctionnement s'avère limité en charge pour des raisons de bruit de 2880915 2 combustion. En effet, la combustion a alors lieu "en bloc", et le bruit est d'autant plus important que la masse injectée est importante. Moreover, during combustion, the air / fuel mixture at the time of self-ignition is not homogeneous, in particular when the engine load is high, because diffusion combustion is then more and more important. . The fuel jet has not had time to vaporize that it is already experiencing a high surrounding temperature. This phenomenon leads to a coking of the fuel which is found in the form of soot emissions. Current solutions consist in further homogenizing the mixture by promoting the pre-mixing phase with respect to the diffusion phase, for example by burning all the mass of fuel introduced into the pre-mixing phase. This makes it possible to suppress the soot emissions, but this type of operation is limited in load due to combustion noise reasons. Indeed, the combustion then takes place "en bloc", and the noise is all the more important that the injected mass is important.
L'invention vise à pallier ces inconvénients en proposant un moteur dont les chambres de combustion sont conformées de manière à limiter la pénétration du carburant dans la chambre afin d'éviter le contact avec la paroi de la chambre, et à améliorer le mélange air/carburant au coeur du jet de carburant. Une meilleure combustion est ainsi obtenue, qui permet de limiter les émissions polluantes. The invention aims to overcome these disadvantages by proposing a motor whose combustion chambers are shaped so as to limit the penetration of fuel into the chamber in order to avoid contact with the wall of the chamber, and to improve the air / fuel mixture. fuel at the heart of the fuel jet. Better combustion is thus obtained, which limits polluting emissions.
A cet effet, l'objet de l'invention concerne un moteur diesel à combustion interne comprenant au moins un cylindre fermé par une culasse pourvu d'un piston mobile en va et vient et d'une chambre de combustion formée entre la culasse et la tête du piston usinée en forme de bol, la chambre comportant au moins un injecteur de carburant monté sur la culasse pourvu d'une pluralité de trous d'injection du carburant dans la chambre, caractérisé en ce que, dans la chambre de combustion, la culasse et le bol du piston sont conformés de manière à présenter sensiblement dans les directions d'écoulement des jets de carburant des parties sensiblement en forme de tuyère convergente puis divergente dans ces directions d'écoulement du carburant. For this purpose, the subject of the invention relates to an internal combustion diesel engine comprising at least one cylinder closed by a cylinder head provided with a reciprocating piston and a combustion chamber formed between the cylinder head and the cylinder. bowl-shaped machined piston head, the chamber having at least one breech-mounted fuel injector provided with a plurality of fuel injection holes in the chamber, characterized in that, in the combustion chamber, the the cylinder head and the piston bowl are shaped so as to substantially have in the direction of flow of the fuel jets substantially convergent and divergent nozzle-shaped portions in these directions of fuel flow.
La chambre de combustion présente ainsi une forme de type "col sonique", qui permet d'amplifier la vaporisation des jets de carburant et par conséquent de favoriser le mélange air/carburant. De plus, les jets de carburant perdent suffisamment de vitesse en traversant le col pour ne pas atteindre la paroi de la chambre située en regard du jet. The combustion chamber thus has a "sonic neck" type shape, which makes it possible to increase the vaporization of the fuel jets and consequently to promote the air / fuel mixture. In addition, the fuel jets lose sufficient speed through the neck to not reach the wall of the chamber located opposite the jet.
Avantageusement, les parties sensiblement en forme de tuyère sont sensiblement symétriques par rapport aux axes des directions d'écoulement des jets de carburant. Advantageously, the substantially nozzle-shaped portions are substantially symmetrical with respect to the axes of the flow directions of the fuel jets.
Dans un mode de réalisation, la paroi inférieure de chaque partie en forme de tuyère est formée par deux parois d'une protubérance centrale formée dans le bol et saillant sensiblement suivant l'axe du piston en direction de l'injecteur, ces parois étant inclinées entre elles, et la paroi supérieure de chaque partie en forme de tuyère est formée par deux parois de la culasse inclinées entre elles. In one embodiment, the bottom wall of each nozzle-shaped portion is formed by two walls of a central protuberance formed in the bowl and protruding substantially along the axis of the piston in the direction of the injector, these walls being inclined between them, and the upper wall of each nozzle-shaped portion is formed by two walls of the yoke inclined together.
Plus particulièrement, la chambre est pourvue d'un seul injecteur disposé sensiblement le long de l'axe du cylindre, et les parois inclinées de la culasse et du bol du piston de la chambre présentent une symétrie 2880915 3 de révolution par rapport à l'axe du cylindre. Le bol et la culasse peuvent ainsi être aisément réalisés par usinage. More particularly, the chamber is provided with a single injector disposed substantially along the axis of the cylinder, and the inclined walls of the cylinder head and the bowl of the piston of the chamber have a symmetry 2880915 3 of revolution relative to the cylinder axis. The bowl and the cylinder head can thus be easily made by machining.
Avantageusement, le moteur comprenant au moins une soupape d'admission et au moins une soupape d'échappement montées sur la culasse et débouchant dans la chambre, les soupapes d'admission et d'échappement de la chambre sont montées sur la culasse de manière à déboucher au niveau des zones divergentes des parties sensiblement en forme de tuyère. Advantageously, the engine comprising at least one intake valve and at least one exhaust valve mounted on the cylinder head and opening into the chamber, the intake and exhaust valves of the chamber are mounted on the cylinder head so as to to emerge at the divergent zones of the substantially nozzle-shaped parts.
Avantageusement, chaque partie sensiblement en forme de tuyère présente un col entre le convergent et le divergent, dont la section présente une dimension choisie de sorte que le cône de chaque jet de carburant affleure la surface du col. Cette configuration crée des instabilités aérodynamiques favorables à la pulvérisation du carburant, réduisant ainsi la formation de suies. De plus, on évite également la formation de dépôt de carburant au niveau du col de chaque partie en forme de tuyère. Advantageously, each substantially nozzle-shaped portion has a neck between the convergent and the divergent, whose section has a chosen dimension so that the cone of each fuel jet is flush with the surface of the neck. This configuration creates aerodynamic instabilities favorable to the spraying of the fuel, thus reducing the formation of soot. In addition, it also avoids the formation of fuel deposition at the neck of each nozzle-shaped portion.
L'invention est maintenant décrite en référence aux dessins annexés, non limitatifs, dans lesquels: - la figure 1 est une vue en coupe d'une partie de la chambre de combustion d'un moteur selon l'invention; - la figure 2 est une vue identique à la figure 1 sur laquelle est représentée le jet de carburant au début, au milieu et à la fin de la phase d'injection. The invention is now described with reference to the appended drawings, in which: FIG. 1 is a sectional view of a part of the combustion chamber of an engine according to the invention; - Figure 2 is a view identical to Figure 1 which shows the fuel jet at the beginning, the middle and at the end of the injection phase.
Sur la figure 1 est représentée la chambre de combustion 1 associée à un cylindre non représenté d'un moteur diesel à combustion interne selon l'invention. In Figure 1 is shown the combustion chamber 1 associated with a not shown cylinder of an internal combustion diesel engine according to the invention.
La chambre de combustion 1 est délimitée d'une part par le bol 2 usiné dans la tête du piston 3 se déplaçant en va et vient dans le cylindre, et d'autre part par la culasse 4. Sur les figures, le piston 3 est représenté en position extrême haute. The combustion chamber 1 is delimited on the one hand by the bowl 2 machined in the head of the piston 3 moving back and forth in the cylinder, and on the other hand by the cylinder head 4. In the figures, the piston 3 is represented in extreme high position.
La chambre de combustion 1 comprend un injecteur de carburant 5 monté sur la culasse 4 et débouchant dans la chambre de combustion. Cet injecteur 5 est unique et disposé sensiblement suivant l'axe D du piston. L'extrémité de l'injecteur 5 est pourvue d'une pluralité de trous d'injection de carburant 6 desquels sortent des jets de carburant 7 (un seul jet de carburant 7 est représenté sur la figure 2). The combustion chamber 1 comprises a fuel injector 5 mounted on the cylinder head 4 and opening into the combustion chamber. This injector 5 is unique and disposed substantially along the axis D of the piston. The end of the injector 5 is provided with a plurality of fuel injection holes 6 from which fuel jets 7 emerge (a single jet of fuel 7 is shown in FIG. 2).
2880915 4 La culasse 4 et le bol 2 sont conformés de manière à présenter sensiblement dans les directions d'écoulement de chaque jet 7 de carburant une partie sensiblement en forme de tuyère. Dans les directions d'écoulement du carburant, d'axe E, ces parties comprennent une partie convergente suivie d'une partie divergente de manière à former une forme de type "col sonique". The yoke 4 and the bowl 2 are shaped so as to have a substantially nozzle-shaped portion substantially in the direction of flow of each jet of fuel. In the E-axis fuel flow directions, these portions comprise a convergent portion followed by a diverging portion so as to form a "sonic neck" shape.
A cet effet, dans l'exemple, la culasse 4 présente deux parois adjacentes 4a, 4b inclinées l'une par rapport à l'autre. La première paroi 4a, située à proximité de l'injecteur, est inclinée par rapport à un plan contenant l'axe D du cylindre, la deuxième paroi 4b s'étend sensiblement perpendiculairement à l'axe D du cylindre. For this purpose, in the example, the yoke 4 has two adjacent walls 4a, 4b inclined relative to each other. The first wall 4a, located near the injector, is inclined relative to a plane containing the axis D of the cylinder, the second wall 4b extends substantially perpendicular to the axis D of the cylinder.
Le bol 2 du piston comprend une protubérance centrale 8 saillant du fond du bol en direction de la culasse sensiblement dans la direction de l'axe D du cylindre. Cette protubérance centrale présente deux parois adjacentes 8a, 8b inclinées l'une par rapport à l'autre. La première paroi 8a, située sensiblement en dessous de l'injecteur, s'étend sensiblement perpendiculairement à l'axe D du cylindre. La deuxième paroi 8b relie la paroi 8a au fond du bol 2. The bowl 2 of the piston comprises a central protrusion 8 protruding from the bottom of the bowl towards the cylinder head substantially in the direction of the axis D of the cylinder. This central protuberance has two adjacent walls 8a, 8b inclined relative to each other. The first wall 8a, located substantially below the injector, extends substantially perpendicular to the axis D of the cylinder. The second wall 8b connects the wall 8a to the bottom of the bowl 2.
Les parois de la culasse 4a et du piston 8a forment la partie convergente de la partie en forme de tuyère, tandis que les parois de la culasse 4b et du piston 8b forment la partie divergente de la partie en forme de tuyère. La zone de jonction entre les parties convergente et divergente forme un col 9 par lequel passe le carburant. The walls of the yoke 4a and the piston 8a form the converging portion of the nozzle-shaped portion, while the walls of the yoke 4b and the piston 8b form the diverging portion of the nozzle-shaped portion. The junction zone between the convergent and divergent portions forms a neck 9 through which the fuel passes.
Dans cet exemple, l'injecteur étant unique et en position centrale, la culasse 4 et le bol 2 présentent une symétrie de révolution par rapport à l'axe D du cylindre. Ainsi, la paroi 4a de la culasse est conique, de même que la paroi 8b du bol. In this example, the injector being unique and in the central position, the yoke 4 and the bowl 2 have a symmetry of revolution with respect to the axis D of the cylinder. Thus, the wall 4a of the cylinder head is conical, as is the wall 8b of the bowl.
Pour une meilleure efficacité, les parois 4a, 8a d'une part, et les parois 4b, 8b d'autre part sont symétriques par rapport à l'axe E de chaque jet 7 de carburant, les trous 6 d'injecteur étant placés sur un cône d'angle d'ouverture (ou angle de nappe) prédéterminé. For a better efficiency, the walls 4a, 8a on the one hand, and the walls 4b, 8b on the other hand are symmetrical with respect to the axis E of each jet 7 of fuel, the injector holes 6 being placed on a cone of aperture angle (or angle of coverage) predetermined.
En raison de la symétrie de la chambre et de l'injecteur, les formes des parois de la culasse et du bol permettant d'obtenir les parties en forme de tuyère sont simples à réaliser dans l'exemple représenté. Bien entendu, des formes plus complexes peuvent être réalisées dans le cas d'une chambre ne présentant pas de symétrie de révolution. Because of the symmetry of the chamber and the injector, the shapes of the walls of the cylinder head and the bowl for obtaining the nozzle-shaped parts are simple to achieve in the example shown. Of course, more complex shapes can be made in the case of a chamber not having symmetry of revolution.
2880915 5 Les soupapes 10 d'admission ou d'échappement de la chambre de combustion sont montées sur la culasse 4 de manière à déboucher au niveau des zones divergentes des parties sensiblement en forme de tuyère. Dans l'exemple, une soupape 10 est située au niveau de la paroi horizontale 4b de la culasse. The inlet or exhaust valves 10 of the combustion chamber are mounted on the cylinder head 4 so as to open at the diverging zones of the substantially nozzle-shaped parts. In the example, a valve 10 is located at the horizontal wall 4b of the cylinder head.
Sur la figure 2, est représentée la progression du jet de carburant 7 au travers de la partie en forme de tuyère. La référence 7 désigne le jet de carburant au début de la phase d'injection, la référence 7', le jet au milieu de la phase d'injection, et la référence 7", le jet à la fin de la phase d'injection. FIG. 2 shows the progression of the fuel jet 7 through the nozzle-shaped part. The reference 7 designates the fuel jet at the beginning of the injection phase, the reference 7 ', the jet in the middle of the injection phase, and the reference 7 ", the jet at the end of the injection phase. .
Au début de la phase d'injection, le jet de carburant 7 crée une surpression au niveau de la partie convergente qui entraîne une augmentation de la vitesse de l'air dans la zone du col 9. At the beginning of the injection phase, the fuel jet 7 creates an overpressure at the converging portion which causes an increase in the air speed in the region of the neck 9.
Au milieu de la phase d'injection, lors du passage du jet de carburant 7' à travers la restriction formée par le col 9, le flux d'air est accéléré et une dépression se crée. Cette dernière va conduire à une vaporisation amplifiée du jet de carburant et à un meilleur mélange avec l'air environnant. In the middle of the injection phase, during the passage of the fuel jet 7 'through the restriction formed by the neck 9, the air flow is accelerated and a vacuum is created. The latter will lead to an increased vaporization of the fuel jet and a better mixture with the surrounding air.
A la fin de la phase d'injection, le jet de carburant 7" décélère en s'épanouissant. Compte tenu de la pénétration limitée du jet, ce dernier n'atteint pas la paroi opposée du bol. At the end of the injection phase, the jet of fuel 7 "decelerates while blooming.According to the limited penetration of the jet, it does not reach the opposite wall of the bowl.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0500578A FR2880915A1 (en) | 2005-01-20 | 2005-01-20 | Diesel internal combustion engine, has cylinder head and piston`s bowl that are provided in combustion chamber and comprise duct shaped part with converging part followed by divergent part to form critical orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0500578A FR2880915A1 (en) | 2005-01-20 | 2005-01-20 | Diesel internal combustion engine, has cylinder head and piston`s bowl that are provided in combustion chamber and comprise duct shaped part with converging part followed by divergent part to form critical orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2880915A1 true FR2880915A1 (en) | 2006-07-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0500578A Pending FR2880915A1 (en) | 2005-01-20 | 2005-01-20 | Diesel internal combustion engine, has cylinder head and piston`s bowl that are provided in combustion chamber and comprise duct shaped part with converging part followed by divergent part to form critical orifice |
Country Status (1)
| Country | Link |
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| FR (1) | FR2880915A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2914358A3 (en) * | 2007-03-28 | 2008-10-03 | Renault Sas | Sonic throat combustion chamber for e.g. direct injection oil engine, has heater plug placed in cylinder head and comprising heat end placed in collar, where collar separates convergent and divergent zones of Venturi shape of chamber |
| WO2011101154A1 (en) * | 2010-02-18 | 2011-08-25 | Volvo Technology Corporation | A piston positioned for reciprocal movement in a combustion engine cylinder |
| US8967129B2 (en) | 2011-01-26 | 2015-03-03 | Caterpillar Inc. | Ducted combustion chamber for direct injection engines and method |
| IT201600118031A1 (en) * | 2016-11-23 | 2017-02-23 | Grimaldi Ing Stefano | Endothermic compression ignition engine with low emission of nitrogen oxides |
| US9909549B2 (en) | 2014-10-01 | 2018-03-06 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| US10138855B2 (en) | 2015-07-01 | 2018-11-27 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection with ignition assist |
| US10161626B2 (en) | 2015-07-01 | 2018-12-25 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| US10801395B1 (en) | 2016-11-29 | 2020-10-13 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| US11713742B1 (en) | 2021-03-09 | 2023-08-01 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection system alignment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296045A (en) * | 1992-04-13 | 1993-11-09 | Hino Motors Ltd | Direct injection diesel engine |
| JP2002276373A (en) * | 2001-03-22 | 2002-09-25 | Isuzu Motors Ltd | Direct injection type internal combustion engine |
| FR2833646A1 (en) * | 2001-12-18 | 2003-06-20 | Renault | Fuel-injected i. c. engine, especially Diesel, has injector set in base of cylinder head cavity corresponding with shape of fuel spray |
| JP2003293773A (en) * | 2002-03-29 | 2003-10-15 | Tokyo Gas Co Ltd | Auxiliary chamber engine |
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- 2005-01-20 FR FR0500578A patent/FR2880915A1/en active Pending
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| FR2914358A3 (en) * | 2007-03-28 | 2008-10-03 | Renault Sas | Sonic throat combustion chamber for e.g. direct injection oil engine, has heater plug placed in cylinder head and comprising heat end placed in collar, where collar separates convergent and divergent zones of Venturi shape of chamber |
| WO2011101154A1 (en) * | 2010-02-18 | 2011-08-25 | Volvo Technology Corporation | A piston positioned for reciprocal movement in a combustion engine cylinder |
| US9027529B2 (en) | 2010-02-18 | 2015-05-12 | Volvo Technology Corporation | Piston positioned for reciprocal movement in a combustion engine cylinder |
| US8967129B2 (en) | 2011-01-26 | 2015-03-03 | Caterpillar Inc. | Ducted combustion chamber for direct injection engines and method |
| US9909549B2 (en) | 2014-10-01 | 2018-03-06 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| US10138855B2 (en) | 2015-07-01 | 2018-11-27 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection with ignition assist |
| US10161626B2 (en) | 2015-07-01 | 2018-12-25 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| IT201600118031A1 (en) * | 2016-11-23 | 2017-02-23 | Grimaldi Ing Stefano | Endothermic compression ignition engine with low emission of nitrogen oxides |
| US10801395B1 (en) | 2016-11-29 | 2020-10-13 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection |
| US11713742B1 (en) | 2021-03-09 | 2023-08-01 | National Technology & Engineering Solutions Of Sandia, Llc | Ducted fuel injection system alignment device |
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