FR2840367A1 - Diesel engine fuel injector comprises nozzle with holes located in rows near nozzle free end and hole sealing needle - Google Patents
Diesel engine fuel injector comprises nozzle with holes located in rows near nozzle free end and hole sealing needle Download PDFInfo
- Publication number
- FR2840367A1 FR2840367A1 FR0206832A FR0206832A FR2840367A1 FR 2840367 A1 FR2840367 A1 FR 2840367A1 FR 0206832 A FR0206832 A FR 0206832A FR 0206832 A FR0206832 A FR 0206832A FR 2840367 A1 FR2840367 A1 FR 2840367A1
- Authority
- FR
- France
- Prior art keywords
- holes
- nozzle
- fuel injector
- fuel
- needle
- 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
Links
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
-
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
-
- 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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
Abstract
Description
element formant joint.joint forming element.
Injecteur de carburant.Fuel injector.
L' invention concerne les injecteurs de carburant pour moteur a The invention relates to fuel injectors for a motor.
combustion interne de type Diesel.Diesel type internal combustion.
Comme on le salt, la qualite de la combustion dans une chambre de combustion d'un moteur a combustion de type Diesel est grandement liee a la qualite du melange air-carburant emplissant la chambre. Pour accelerer le processus de melange entre les gaz et le carburant, de tres nombreux moteurs Diesel utilisent des chambres de combustion dans lesquelles l'air a une vitesse de rotation ou << swirl >> As it is salted, the quality of combustion in a combustion chamber of a diesel type combustion engine is greatly linked to the quality of the air-fuel mixture filling the chamber. To accelerate the mixing process between gases and fuel, many diesel engines use combustion chambers in which the air has a speed of rotation or "swirl"
tres elevee.very high.
Par ailleurs, pour ameliorer ce melange, il convient d'ameliorer la pulverisation du carburant dans la chambre. Ceci est effectue, d'une part, en augmentant la pression d'injection, et, d'autre part, en Furthermore, to improve this mixture, it is necessary to improve the atomization of the fuel in the chamber. This is done, on the one hand, by increasing the injection pressure, and, on the other hand, by
reduisant le diametre des trous de l'injecteur. reducing the diameter of the injector holes.
Generalement, la diminution du diametre des trous s'accompagne d'une augmentation du nombre de trous, de maniere a conserver constante la section globale des passages dtinjection de carburant. On pourra, a cet egard, se referer au document WO 01/66932 qui decrit un injecteur de carburant pour moteur a combustion interne de type Diesel, qui comporte une buse pourvue de trous dtinjection de carburant disposes en rangees au voisinage de la zone d'extremite libre de la louse. La buse est associee a deux aiguilles coaxiales, permettant l'ouverture selective et independante de chaque rangee de buses. I1 est ainsi possible d'ouvrir ou de fermer chaque rangee de buses pour adapter la section effective des trous au point de fonctionnement du moteur. Cette technique presente cependant un inconvenient majour, dans la mesure ou, l'utilisation de deux aiguilles coaxiales pour l'ouverture independante de chaque rangee de buses necessite un Generally, the decrease in the diameter of the holes is accompanied by an increase in the number of holes, so as to keep constant the overall section of the fuel injection passages. In this regard, reference may be made to document WO 01/66932 which describes a fuel injector for an internal combustion engine of the Diesel type, which comprises a nozzle provided with fuel injection holes arranged in rows in the vicinity of the area of free end of the louse. The nozzle is associated with two coaxial needles, allowing the selective and independent opening of each row of nozzles. It is thus possible to open or close each row of nozzles to adapt the effective section of the holes to the operating point of the engine. However, this technique has a drawback, insofar as the use of two coaxial needles for the independent opening of each row of nozzles requires a
systeme mecanique relativement complexe a mettre en ceuvre. relatively complex mechanical system to implement.
En outre, comme indique precedemment, pour accelerer le processus de melange entre les gaz et le carburant, on utilise des chambres de combustion dans lesquelles l' air a une vitesse de rotation tres elevee et l'on injecte le carburant dans les zones dans lesquelles le mouvement de l' air est le plus energetique. Ce but est atteint, d'une part, en optimisant le positionnement de la buse et, surtout, en Furthermore, as indicated above, to accelerate the mixing process between the gases and the fuel, combustion chambers are used in which the air has a very high speed of rotation and the fuel is injected into the areas in which the movement of air is the most energetic. This goal is achieved, on the one hand, by optimizing the positioning of the nozzle and, above all, by
optimisant ['angle du flux de carburant issu de l'injecteur. optimizing the angle of the fuel flow from the injector.
En ce qui concerne lt optimisation de l' angle de la nappe de carburant, en regle generale, on cherche a injecter le carburant dans le Regarding the optimization of the angle of the fuel table, as a rule, it is sought to inject the fuel into the
bol du cylindre, au niveau duquel la vitesse du gaz est la plus elevee. bowl of the cylinder, at which the gas speed is highest.
Or, le positionnement du piston dans le cycle de fonctionnement du moteur est fonction du regime. A teas regime, le piston reste plus longtemps au voisinage du point mort haut (PMH), permettant ainsi d'injecter la majorite du carburant dans le bol avec un angle de nappe relativement ouvert. La situation st inverse a haut However, the positioning of the piston in the engine operating cycle is a function of the speed. At teas regime, the piston remains longer in the vicinity of the top dead center (TDC), thus making it possible to inject the majority of the fuel into the bowl with a relatively open tablecloth angle. The reverse situation is high
regime, pour lequel un angle de nappe plus ferme est mieux adapte. regime, for which a firmer tablecloth angle is better suited.
On con,coit des lors qutil est souhaitable de disposer d'un injecteur dont la buse est capable d'injecter du carburant selon des It is understood, therefore, when it is desirable to have an injector whose nozzle is capable of injecting fuel according to
angles differents.different angles.
Aussi, le but de l' invention est de pallier ces inconvenients. Also, the object of the invention is to overcome these drawbacks.
L'invention propose done un injecteur de carburant pour moteur a combustion interne de type Diesel, comprenant une buse pourvue de trous d' injection de carburant qui vent disposes en rangees au voisinage de la zone d'extremite libre de la roue et un organe The invention therefore provides a fuel injector for a diesel-type internal combustion engine, comprising a nozzle provided with fuel injection holes which are arranged in rows in the vicinity of the free end zone of the wheel and a member.
d'obturation des trous.sealing holes.
L'organe d'obturation comporte une aiguille qui est montee axialement depla,cable dans la louse, entre une premiere position de fermeture desdits trous et une position d'ouverture des trous. En outre, les trous vent adaptes pour provoquer ['injection de carburant selon The shutter member comprises a needle which is mounted axially flat, cable in the louse, between a first position for closing said holes and a position for opening the holes. In addition, the wind holes suitable for causing fuel injection according to
des flux differents, d'une rangee de buses a l'autre. different flows, from one row of nozzles to another.
La nappe de carburant est ainsi emise selon un angle globalement divergent, ce qui permet d'optimiser l' angle de la nappe The fuel sheet is thus emitted at a generally divergent angle, which makes it possible to optimize the angle of the sheet
quel que soit le regime du moteur.whatever the engine speed.
Selon une autre caracteristique de cet injecteur, le diametre des According to another characteristic of this injector, the diameter of the
trous varie d'une rangee de trous a l'autre. holes vary from one row of holes to another.
De meme, de reference, ['angle forme par l'axe des trous et Likewise, for reference, the angle formed by the axis of the holes and
l'axe general de la buse varie d'une rangee de trous a l'autre. the general axis of the nozzle varies from one row of holes to another.
Selon un mode de realisation particulier, le nombre de trous According to a particular embodiment, the number of holes
varie d'une rangee de trous a l'autre. varies from one row of holes to another.
Selon un autre mode de realisation, la buse comporte un alesage interne s'etendant entre deux rangees de trous et destine a constituer un siege de reception d'un surface peripherique complementaire menagee dans l'aiguille pour obturer une partie According to another embodiment, the nozzle has an internal bore extending between two rows of holes and intended to constitute a seat for receiving a complementary peripheral surface formed in the needle to close off part
senlement des trous en position intermediaire de l'aiguille. only holes in the intermediate position of the needle.
On notera que cette invention peut s'appliquer a un injecteur Note that this invention can be applied to an injector
de type a sac ou de type a siege perfore. bag type or perforated seat type.
D'autres buts, caracteristiques et avantages de ['invention Other objects, features and advantages of the invention
apparatront a la lecture de la description suivante, donnee uniquement will appear on reading the following description, given only
a titre d'exemple non limitatif, et faite en reference aux dessins annexes, sur lesquels: -la figure 1 est une vue schematique en coupe axiale d'un injecteur de carburant conforme a ['invention; -la figure 2 est une vue de detail de la buse de la figure 1; -la figure 3 illustre un autre mode de realisation de l'injecteur de carburant de la figure 1; et; -la figure 4 et 5 illustrent un mode de realisation particulier de l'injecteur de carburant conforme a ['invention, dans differentes by way of nonlimiting example, and made with reference to the accompanying drawings, in which: FIG. 1 is a schematic view in axial section of a fuel injector according to the invention; FIG 2 is a detail view of the nozzle of Figure 1; FIG. 3 illustrates another embodiment of the fuel injector of FIG. 1; and; FIG. 4 and 5 illustrate a particular embodiment of the fuel injector according to the invention, in different
positions de l'aiguille d'obturation des trous. positions of the hole shutter needle.
Sur la figure 1, on a represente la structure generale d'un injecteur de carburant pour moteur a combustion interne d'un vehicule automobile de type Diesel, designe par la reference numerique In FIG. 1, the general structure of a fuel injector for an internal combustion engine of a diesel type motor vehicle is shown, designated by the reference numeral.
generale 10.general 10.
Comme on le volt sur cette figure, l'injecteur 10 comporte essentiellement une buse 12 dont l'extremite proximale 14 est destinee a etre alimentee en carburant par le systeme d'alimentation en carburant du vehicule automobile, et dont l'extremite libre ou distale 16 est pourvue de trous, tels que 18, qui debouchent dans la chambre As shown in this figure, the injector 10 essentially comprises a nozzle 12 whose proximal end 14 is intended to be supplied with fuel by the fuel supply system of the motor vehicle, and whose free or distal end 16 is provided with holes, such as 18, which open into the chamber
de combustion du moteur.combustion engine.
Dans l'exemple de realisation represente sur la figure 1, la buse 12 de l'injecteur est une buse de type a siege perfore ou a orifice obture par une aiguille (VCO). Cependant, ['invention st applique egalement a un injecteur de In the embodiment shown in FIG. 1, the nozzle 12 of the injector is a nozzle of the type with a perforated seat or with an orifice closed by a needle (VCO). However, the invention also applies to an injector of
carburant dont la buse est une buse de type a sac. fuel whose nozzle is a bag type nozzle.
La description de ['invention qui va suivre s'applique The description of the invention which follows applies
egalement a un tel mode de realisation. also to such an embodiment.
Comme on le volt sur la figure 1, les trous 18 vent disposes en rangees 18-a, 18-b et 18-c, de forme annulaire, et disposes de maniere As shown in Figure 1, the holes 18 are arranged in rows 18-a, 18-b and 18-c, of annular shape, and arranged in a manner
coaxiale, de l'extremite proximale 14 vers ltextremite distale 16. coaxial, from the proximal end 14 to the distal end 16.
Une aiguille 20, pilotee par un dispositif de commande correspondent, est montee axialement deplac,able dans la buse 12 entre une premiere position de fermeture des trous (non representee), et une A needle 20, piloted by a corresponding control device, is mounted axially displaced, able in the nozzle 12 between a first position for closing the holes (not shown), and a
deuxieme position d'ouverture des trous (representee sur la figure 1). second hole opening position (shown in Figure 1).
Conformement a une caracteristique de ['invention, les trous des rangees 18-a, 18-b et 18-c vent adaptes pour provoquer ['injection In accordance with a feature of the invention, the holes in rows 18-a, 18-b and 18-c are adapted to cause injection.
de carburant selon des flux differents. of fuel according to different flows.
Plus particulierement, les rangees de trous vent chacune prevues pour emettre une nappe de carburant selon un angle ot, par rapport a l'axe XX' general de l'injecteur 10 specifique. De meme chaque rangee de trous peut avoir un diametre, un nombre et une repartition circonferentielle specifique. I1 est ainsi possible d' adapter More particularly, the rows of wind holes each provided for emitting a sheet of fuel at an angle ot, relative to the general axis XX ′ of the specific injector 10. Likewise, each row of holes can have a specific diameter, number and circumferential distribution. It is thus possible to adapt
chaque nappe a une plage de regime et de charge du moteur. each cable has an engine speed and load range.
Comme on le volt sur la figure 1, il est possible de prevoir un angle de nappe d'environ 85 pour la nappe amont, en considerant le sens d'injection de carburant, et un angle de nappe de 30 pour la As shown in Figure 1, it is possible to predict a tablecloth angle of around 85 for the upstream tablecloth, considering the direction of fuel injection, and a tablecloth angle of 30 for the
nappe aval.downstream water table.
Ainsi, comme on le con,coit, une injection de carburant en utilisant une nappe emise selon un angle relativement important, ce qui est le cas de la nappe amont, est adaptee pour un fonctionnement a teas regime, et une injection de carburant avec un angle plus ferme, ce qui est le cas pour la nappe aval, est adaptee pour un fonctionnement a Thus, as we know, a fuel injection using a tablecloth emitted at a relatively large angle, which is the case of the upstream tablecloth, is suitable for operation at teas regime, and a fuel injection with a firmer angle, which is the case for the downstream tablecloth, is suitable for operation at
haut regime.high speed.
Comme on le volt sur la figure 2 sur laquelle certains details ont ete exageres pour ameliorer la clarte, et comme indique precedemment, il est possible d'orienter les orifices de rangees consecutives 18a, 18-b et 18c de sorte que les nappes N1, N2 et N3 divergent. Au contraire, comme visible sur la figure 3, il est possible d'orienter les trous, de sorte que les nappes N1, N2 et N3 convergent globalement. Conformement a une autre caracteristique de ['invention, il est possible de conformer la surface externe de l'aiguille 20, ainsi que la surface peripherique interne de la buse 12, entre deux rangees 18-a et 18-b, de maniere qu'elles solent pourvues de surfaces complementaires apses a provoquer, en position intermediaire, comme represente sur la figure S. une obturation des trous aval, tout en laissant ouverts les As shown in Figure 2, in which certain details have been exaggerated to improve clarity, and as indicated above, it is possible to orient the consecutive row orifices 18a, 18-b and 18c so that the layers N1, N2 and N3 diverge. On the contrary, as visible in FIG. 3, it is possible to orient the holes, so that the layers N1, N2 and N3 converge overall. According to another characteristic of the invention, it is possible to conform the external surface of the needle 20, as well as the internal peripheral surface of the nozzle 12, between two rows 18-a and 18-b, so that they are provided with complementary surfaces which are apt to cause, in the intermediate position, as shown in FIG. S., a filling of the downstream holes, while leaving open the
trous amont.upstream holes.
Ceci peut etre realise en prevoyant des alesages complementaires 22 et 24, respectivement sur l'aiguille 20 et sur la buse 12, de sorte que, en position intermediaire de l'aiguille 20, ces alesages soient en appui l'un contre l'autre et emp8chent tout passage This can be achieved by providing additional bores 22 and 24, respectively on the needle 20 and on the nozzle 12, so that, in the intermediate position of the needle 20, these bores are in abutment against one another and prevent any passage
de carburant vers les trous aval.fuel to the downstream holes.
On notera que, dans cette configuration, la hauteur h des alesages correspond a une hauteur de course de l'aiguille 20 a partir de It will be noted that, in this configuration, the height h of the bores corresponds to a height of travel of the needle 20 from
laquelle ['injection de carburant, par les trous aval, est autorisee. which fuel injection, through the downstream holes, is authorized.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0206832A FR2840367B1 (en) | 2002-06-04 | 2002-06-04 | FUEL INJECTOR FOR A DIESEL-TYPE MOTOR VEHICLE INTERNAL COMBUSTION ENGINE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0206832A FR2840367B1 (en) | 2002-06-04 | 2002-06-04 | FUEL INJECTOR FOR A DIESEL-TYPE MOTOR VEHICLE INTERNAL COMBUSTION ENGINE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2840367A1 true FR2840367A1 (en) | 2003-12-05 |
| FR2840367B1 FR2840367B1 (en) | 2004-12-10 |
Family
ID=29558937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0206832A Expired - Lifetime FR2840367B1 (en) | 2002-06-04 | 2002-06-04 | FUEL INJECTOR FOR A DIESEL-TYPE MOTOR VEHICLE INTERNAL COMBUSTION ENGINE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2840367B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2888618A1 (en) | 2005-07-13 | 2007-01-19 | Renault Sas | Fuel e.g. diesel oil, injection nozzle for diesel engine, has ring shaped toric sections with openings disposed on external side, where sections are placed internal to injection bowl and are connected by supply conduits to fuel system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1190361A (en) * | 1957-01-23 | 1959-10-12 | Maschf Augsburg Nuernberg Ag | Nozzle for internal combustion engines |
| GB1214242A (en) * | 1968-04-11 | 1970-12-02 | Sulzer Ag | Improvements in or relating to internal combustion engines |
| GB1293088A (en) * | 1969-06-18 | 1972-10-18 | Ffsa | Improvements in or relating to fuel injectors |
| JPS59147864A (en) * | 1983-02-12 | 1984-08-24 | Toyota Motor Corp | Fuel injection valve for diesel engine |
| JPS61135979A (en) * | 1984-12-04 | 1986-06-23 | Nissan Motor Co Ltd | Fuel injection valve for diesel engine |
| GB2266559A (en) * | 1992-05-02 | 1993-11-03 | Bosch Gmbh Robert | Pre-injection and main injection i.c.engine fuel injector. |
| JPH07310628A (en) * | 1994-05-17 | 1995-11-28 | Nissan Motor Co Ltd | Fuel injection valve |
| DE19958126A1 (en) * | 1998-12-14 | 2000-06-15 | Denso Corp | Fuel injection valve for IC engines produces fuel jet pattern regulated dependent upon engine type or output |
| WO2001066932A1 (en) | 2000-03-06 | 2001-09-13 | Robert Bosch Gmbh | Injection nozzle |
-
2002
- 2002-06-04 FR FR0206832A patent/FR2840367B1/en not_active Expired - Lifetime
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1190361A (en) * | 1957-01-23 | 1959-10-12 | Maschf Augsburg Nuernberg Ag | Nozzle for internal combustion engines |
| GB1214242A (en) * | 1968-04-11 | 1970-12-02 | Sulzer Ag | Improvements in or relating to internal combustion engines |
| GB1293088A (en) * | 1969-06-18 | 1972-10-18 | Ffsa | Improvements in or relating to fuel injectors |
| JPS59147864A (en) * | 1983-02-12 | 1984-08-24 | Toyota Motor Corp | Fuel injection valve for diesel engine |
| JPS61135979A (en) * | 1984-12-04 | 1986-06-23 | Nissan Motor Co Ltd | Fuel injection valve for diesel engine |
| GB2266559A (en) * | 1992-05-02 | 1993-11-03 | Bosch Gmbh Robert | Pre-injection and main injection i.c.engine fuel injector. |
| JPH07310628A (en) * | 1994-05-17 | 1995-11-28 | Nissan Motor Co Ltd | Fuel injection valve |
| DE19958126A1 (en) * | 1998-12-14 | 2000-06-15 | Denso Corp | Fuel injection valve for IC engines produces fuel jet pattern regulated dependent upon engine type or output |
| WO2001066932A1 (en) | 2000-03-06 | 2001-09-13 | Robert Bosch Gmbh | Injection nozzle |
Non-Patent Citations (3)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 008, no. 276 (M - 346) 18 December 1984 (1984-12-18) * |
| PATENT ABSTRACTS OF JAPAN vol. 010, no. 331 (M - 533) 11 November 1986 (1986-11-11) * |
| PATENT ABSTRACTS OF JAPAN vol. 1996, no. 03 29 March 1996 (1996-03-29) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2888618A1 (en) | 2005-07-13 | 2007-01-19 | Renault Sas | Fuel e.g. diesel oil, injection nozzle for diesel engine, has ring shaped toric sections with openings disposed on external side, where sections are placed internal to injection bowl and are connected by supply conduits to fuel system |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2840367B1 (en) | 2004-12-10 |
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