EP1529935A1 - Jet for piston cooling with reduced inter-axle - Google Patents

Jet for piston cooling with reduced inter-axle Download PDF

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Publication number
EP1529935A1
EP1529935A1 EP04356176A EP04356176A EP1529935A1 EP 1529935 A1 EP1529935 A1 EP 1529935A1 EP 04356176 A EP04356176 A EP 04356176A EP 04356176 A EP04356176 A EP 04356176A EP 1529935 A1 EP1529935 A1 EP 1529935A1
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EP
European Patent Office
Prior art keywords
axis
nozzle
nozzle body
peripheral wall
transverse
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Granted
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EP04356176A
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German (de)
French (fr)
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EP1529935B1 (en
Inventor
Yves Bontaz
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Bontaz Centre SA
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Bontaz Centre SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets

Definitions

  • the present invention relates to piston cooling nozzles for an internal combustion engine, used to project a fluid of cooling such as oil against the piston bottom, that is to say against the face outside piston to the explosion chamber.
  • the piston cooling nozzles usually used are inserts attached to the crankcase and communicating with an orifice supply of cooling fluid.
  • the position of the jet must be determined accurately, to accurately determine the impact of the fluid jet of cooling on the piston bottom.
  • Jet body has a portion cylindrical shaped for its introduction into a fluid supply port of the engine cylinder housing.
  • a first solution consists in providing a nozzle having a coaxial screw-plug which screws into a threaded end portion of the fluid supply line.
  • a cross-sectional plate blocks the rotating nozzle.
  • a second solution usually used for fixing the jet on the engine cylinder casing consists in providing a transverse fixing plate, comprising a first hole in which is fixed the jet body, and comprising a second hole laterally offset from the transverse bore, for the passage of a nozzle fixing screw on the engine cylinder housing.
  • This second solution is simpler to implement, but it has the disadvantage of a sometimes excessive congestion.
  • the peripheral wall of the jet body must be sufficiently thick so that the axial bore effectively retains the fluid outlet conduit of cooling.
  • the fastening screw must be of sufficient diameter to ensure sufficient clamping of the mounting plate on the engine cylinder housing, avoiding any risk of detachment or vibration.
  • the problem proposed by the present invention is thus to conceive a new piston cooling jet structure, the fixation of which is carried out by a transversal plate of fixation, whose size of the plate transverse fixing is reduced, and whose inter-axis between the axis of the screw of fixing and the axis of the nozzle body is also reduced.
  • the goal is to allow to adapt such sprinklers in engines having a reduced space for fixing the cooling nozzle.
  • the aim of the invention is, at the same time, to ensure operation and correct reliability of the piston cooling nozzle, and in particular correct coolant outlet duct and all of the nozzle himself.
  • the external recess in the diametrically opposite peripheral wall allows to bring the axis of the jet body and the axis of the fixing screw, while allowing the maneuvering of the fixing screw by a clamping tool such as a robot arm end.
  • Another advantage is that the outer recess provides relief from the piston cooling nozzle, which is favorable in the research current engine performance.
  • the inter-axis of the first and second holes of the plate transversal fixation is just sufficient to allow engagement and rotation of a screwdriver on the screw head fixing without contact with the peripheral wall of the nozzle body.
  • the external recess is a flat part parallel to the axis of the nozzle body.
  • the external recess is a surface Concave cylindrical axis parallel to the axis of the nozzle body and coaxial to the axis of the fixing screw.
  • This last embodiment is particularly adapted to a screwing system in which the screwing tool is the end of an arm of robot with cylindrical outer contour of revolution and internal contour adapted for taking the screw head.
  • the nozzle comprises a nozzle body 1 wall generally cylindrical peripheral of axis I-I and surrounding an axial bore 2 containing valve means 3.
  • the valve means 3 comprises a fixing screw 3a whose axial rod 3b guides a spring of 3c compression that pushes a 3d closure ball against a 3rd body seat nozzle 1.
  • the ball 3d can close the axial bore 2 as the pressure of cooling fluid at the inlet 2a of the axial bore 2 does not exceed a threshold determined corresponding to the thrust force of the spring 3b.
  • the peripheral wall 1a of the nozzle body 1 is traversed by a transverse drilling 4 communicating with the axial bore 2 and connected to a coolant outlet duct 5.
  • the nozzle body 1 comprises a cylindrical input portion 1b, coaxial axis I-I, shaped for its introduction into a supply port of fluid from the engine cylinder housing.
  • a transverse fixing plate 6 is associated with the nozzle body 1 to secure it to the engine cylinder cover.
  • the plate transverse fixation 6 has a first hole 6a in which is fixed the body nozzle 1, by welding or fitting, and comprises a second hole 6b offset laterally opposite the transverse bore 4, for the passage of a screw attachment 7 of the nozzle on the engine cylinder housing.
  • the inter-axis E1 between the axis I-I of the nozzle body 1 and the axis II-II of the fixing screw 7 must be sufficient to leave a radial clearance between the nozzle body 1 and a tool of screwing that is engaged on the head of the fixing screw 7. This is the reason for which the inter-axis E1 must be wide, which forces to dimension in consequently the fixing plate 6.
  • the peripheral wall 1 has a thickness T which is greater than or equal to the diameter D of the transverse bore 4.
  • the cooling fluid outlet duct 5 can be a tube reported, force-fitted by its end in the transverse bore 4, this which is sufficient to ensure effective maintenance of the fluid outlet duct 5.
  • the peripheral wall is thinner due to the presence of an external recess 1d with regard to the second hole 6b of the transverse fixing plate 6.
  • the inter-axis E2 of the first hole 6a and second hole 6b of the transverse attachment plate 6, or between-axis between the body nozzle 1 and the fixing screw 7, is just sufficient to allow the engagement and the rotation of a screwing tool 8 on the head of the fixing screw 7 without contact with the peripheral wall 1a of the nozzle body 1. It is left, between the tool of screwing 8 and the nozzle body 1, a functional game that facilitates the movement of the screwing tool 8 during its adaptation and its withdrawal relative to the screw of fixing 7.
  • the external recess 1d is a concave cylindrical surface with an axis parallel to the axis I-I of the nozzle body 1 and coaxial with the axis II-II of the fixing screw 7.
  • the screwing tool 8 as illustrated is the end of a robot arm to cylindrical outer contour of revolution and inner contour adapted for taking of the screw head 7.
  • the external recess 1d is a flat parallel to the axis I-I of the nozzle body 1.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The nozzle has a peripheral wall (1a) with thickness greater than or equal to diameter of a transversal hole (4), so that an end of a coolant outlet duct is fixed in the hole. The wall is thin due to the presence of an external recess (1d) opposite to a hole of a transversal fixing plate (6). A nozzle body and a fixing screw have a small axis distance between them which is sufficient to rotate a screwing tool on a screw head. The external recess is in a portion opposite to the hole, and permits to connect axes of the nozzle body and the fixing screw.

Description

La présente invention concerne les gicleurs de refroidissement de piston pour moteur à combustion interne, utilisés pour projeter un fluide de refroidissement tel que de l'huile contre le fond de piston, c'est-à-dire contre la face de piston extérieure à la chambre d'explosion.The present invention relates to piston cooling nozzles for an internal combustion engine, used to project a fluid of cooling such as oil against the piston bottom, that is to say against the face outside piston to the explosion chamber.

Les gicleurs de refroidissement de piston habituellement utilisés sont des pièces rapportées fixées sur le carter moteur et communiquant avec un orifice d'amenée de fluide de refroidissement. La position du gicleur doit être déterminée avec précision, pour déterminer de façon précise l'impact du jet de fluide de refroidissement sur le fond de piston.The piston cooling nozzles usually used are inserts attached to the crankcase and communicating with an orifice supply of cooling fluid. The position of the jet must be determined accurately, to accurately determine the impact of the fluid jet of cooling on the piston bottom.

On connaít déjà des gicleurs de refroidissement de piston pour moteur à combustion interne comprenant un corps de gicleur à paroi périphérique généralement cylindrique entourant un perçage axial contenant un moyen de clapet. La paroi périphérique est traversée d'un perçage transversal communiquant avec le perçage axial et raccordé à un conduit de sortie de fluide de refroidissement sous forme de tube. Le corps de gicleur comporte une portion cylindrique conformée pour son introduction dans un orifice d'amenée de fluide du carter de cylindre moteur.Already known piston cooling jets for engine to internal combustion comprising a nozzle body with a peripheral wall generally cylindrical surrounding an axial bore containing a means of valve. The peripheral wall is traversed by a transverse piercing communicating with the axial bore and connected to a fluid outlet duct of cooling in the form of a tube. Jet body has a portion cylindrical shaped for its introduction into a fluid supply port of the engine cylinder housing.

Pour fixer le gicleur au carter de cylindre moteur, une première solution, décrite dans le document EP 0 682 175 A1, consiste à prévoir un gicleur ayant une vis-clapet coaxiale qui se visse dans une portion d'extrémité taraudée de la canalisation d'amenée de fluide. Une plaque transversale rapportée bloque le gicleur en rotation.To fix the nozzle to the engine cylinder casing, a first solution, described in document EP 0 682 175 A1, consists in providing a nozzle having a coaxial screw-plug which screws into a threaded end portion of the fluid supply line. A cross-sectional plate blocks the rotating nozzle.

Une seconde solution habituellement utilisée pour la fixation du gicleur sur le carter de cylindre moteur, décrite dans les documents DE 29 38 431 A1 ou US 4,995,346, consiste à prévoir une plaque transversale de fixation, comportant un premier trou dans lequel est fixé le corps de gicleur, et comportant un second trou décalé latéralement à l'opposé du perçage transversal, pour le passage d'une vis de fixation du gicleur sur le carter de cylindre moteur.A second solution usually used for fixing the jet on the engine cylinder casing, described in documents DE 29 38 431 A1 or US 4,995,346, consists in providing a transverse fixing plate, comprising a first hole in which is fixed the jet body, and comprising a second hole laterally offset from the transverse bore, for the passage of a nozzle fixing screw on the engine cylinder housing.

Cette seconde solution est plus simple à mettre en oeuvre, mais elle présente l'inconvénient d'un encombrement parfois excessif.This second solution is simpler to implement, but it has the disadvantage of a sometimes excessive congestion.

La paroi périphérique du corps de gicleur doit être suffisamment épaisse pour que le perçage axial retienne efficacement le conduit de sortie de fluide de refroidissement.The peripheral wall of the jet body must be sufficiently thick so that the axial bore effectively retains the fluid outlet conduit of cooling.

La vis de fixation doit avoir un diamètre suffisant pour assurer un serrage suffisant de la plaque de fixation sur le carter de cylindre moteur, évitant tout risque de détachement ou de vibration. The fastening screw must be of sufficient diameter to ensure sufficient clamping of the mounting plate on the engine cylinder housing, avoiding any risk of detachment or vibration.

Ces deux contraintes obligent à conserver un entre-axe relativement large entre l'axe du corps de gicleur et l'axe de la vis de fixation. Cela conduit à des grandes tailles de plaque transversale de fixation.These two constraints make it necessary to maintain a relative distance between wide between the axis of the nozzle body and the axis of the fastening screw. This leads to large sizes of transverse attachment plate.

Or un besoin existe pour réduire la taille de la plaque transversale de fixation et l'encombrement global du gicleur de refroidissement de piston, afin notamment de permettre leur utilisation dans des moteurs et qui laissent une place réduite pour le positionnement du gicleur de refroidissement de piston.However, there is a need to reduce the size of the transverse plate of fixing and overall size of the piston cooling nozzle, so in particular to allow their use in engines and which leave room reduced for the positioning of the piston cooling nozzle.

Le problème proposé par la présente invention est ainsi de concevoir une nouvelle structure de gicleur de refroidissement de piston, dont la fixation s'effectue par une plaque transversale de fixation, dont la taille de la plaque transversale de fixation est réduite, et dont l'entre-axe entre l'axe de la vis de fixation et l'axe du corps de gicleur est également réduit.The problem proposed by the present invention is thus to conceive a new piston cooling jet structure, the fixation of which is carried out by a transversal plate of fixation, whose size of the plate transverse fixing is reduced, and whose inter-axis between the axis of the screw of fixing and the axis of the nozzle body is also reduced.

Le but est de permettre d'adapter de tels gicleurs dans des moteurs présentant une place réduite pour la fixation du gicleur de refroidissement.The goal is to allow to adapt such sprinklers in engines having a reduced space for fixing the cooling nozzle.

L'invention vise, simultanément, à assurer un fonctionnement et une fiabilité corrects du gicleur de refroidissement de piston, et notamment un maintien correct du conduit de sortie de fluide de refroidissement et de l'ensemble du gicleur lui-même.The aim of the invention is, at the same time, to ensure operation and correct reliability of the piston cooling nozzle, and in particular correct coolant outlet duct and all of the nozzle himself.

Pour atteindre ces buts ainsi que d'autres, l'invention propose un gicleur de refroidissement de piston pour moteur à combustion interne, comprenant :

  • un corps de gicleur à paroi périphérique entourant un perçage axial contenant un moyen de clapet, la paroi périphérique étant traversée d'un perçage transversal communiquant avec le perçage axial et raccordé à un conduit de sortie de fluide de refroidissement, le corps de gicleur comportant une portion cylindrique d'entrée conformée pour son introduction dans un orifice d'amenée de fluide du carter de cylindre moteur,
  • une plaque transversale de fixation, comportant un premier trou dans lequel est fixé le corps de gicleur, et comportant un second trou décalé latéralement à l'opposé du perçage transversal, pour le passage d'une vis de fixation du gicleur sur le carter de cylindre moteur ;
   selon l'invention :
  • au moins autour du perçage transversal, la paroi périphérique est épaisse, son épaisseur T étant supérieure ou égale au diamètre du perçage transversal,
  • dans sa portion diamétralement opposée au perçage transversal, la paroi périphérique est plus mince du fait de la présence d'un évidement externe en regard du second trou de la plaque transversale de fixation.
To achieve these and other objects, the invention provides a piston cooling nozzle for an internal combustion engine, comprising:
  • a circumferential nozzle body surrounding an axial bore containing a valve means, the peripheral wall having a transverse bore therethrough communicating with the axial bore and connected to a coolant outlet conduit, the nozzle body having a cylindrical input portion shaped for its introduction into a fluid supply port of the engine cylinder housing,
  • a transverse fixing plate, comprising a first hole in which is fixed the nozzle body, and having a second hole offset laterally opposite the transverse bore, for the passage of a nozzle fixing screw on the cylinder housing; engine;
according to the invention:
  • at least around the transverse bore, the peripheral wall is thick, its thickness T being greater than or equal to the diameter of the transverse bore,
  • in its portion diametrically opposed to the transverse bore, the peripheral wall is thinner due to the presence of an external recess facing the second hole of the transverse fixing plate.

Grâce à l'épaisseur suffisante de la paroi périphérique, dans la zone retenant le conduit de sortie de fluide, le maintien du conduit est efficace et satisfaisant.Thanks to the sufficient thickness of the peripheral wall, in the zone retaining the fluid outlet duct, maintaining the duct is effective and satisfactory.

Simultanément, l'évidement externe dans la portion diamétralement opposée de paroi périphérique permet de rapprocher l'axe du corps de gicleur et l'axe de la vis de fixation, tout en permettant la manoeuvre de la vis de fixation par un outil de serrage tel qu'une extrémité de bras de robot.At the same time, the external recess in the diametrically opposite peripheral wall allows to bring the axis of the jet body and the axis of the fixing screw, while allowing the maneuvering of the fixing screw by a clamping tool such as a robot arm end.

Un autre avantage est que l'évidement externe réalise un allégement du gicleur de refroidissement de piston, ce qui est favorable dans la recherche actuelle des performances des moteurs.Another advantage is that the outer recess provides relief from the piston cooling nozzle, which is favorable in the research current engine performance.

De préférence, l'entre-axe des premier et second trous de la plaque transversale de fixation est juste suffisant pour permettre l'engagement et la rotation d'un outil de vissage sur la tête de vis de fixation sans contact avec la paroi périphérique du corps de gicleur.Preferably, the inter-axis of the first and second holes of the plate transversal fixation is just sufficient to allow engagement and rotation of a screwdriver on the screw head fixing without contact with the peripheral wall of the nozzle body.

Selon un premier mode de réalisation, l'évidement externe est un méplat parallèle à l'axe du corps de gicleur.According to a first embodiment, the external recess is a flat part parallel to the axis of the nozzle body.

Selon un autre mode de réalisation, l'évidement externe est une surface cylindrique concave d'axe parallèle à l'axe du corps de gicleur et coaxiale à l'axe de la vis de fixation. Ce dernier mode de réalisation est particulièrement adapté à un système de vissage dans lequel l'outil de vissage est l'extrémité d'un bras de robot à contour externe cylindrique de révolution et à contour intérieur adapté pour la prise de la tête de vis.According to another embodiment, the external recess is a surface Concave cylindrical axis parallel to the axis of the nozzle body and coaxial to the axis of the fixing screw. This last embodiment is particularly adapted to a screwing system in which the screwing tool is the end of an arm of robot with cylindrical outer contour of revolution and internal contour adapted for taking the screw head.

D'autres objets, caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation particuliers, faite en relation avec les figures jointes, parmi lesquelles :

  • la figure 1 illustre, en perspective, une structure de gicleur de refroidissement de piston selon l'art antérieur, avec un entre-axe relativement important entre le corps de piston et la vis de fixation ;
  • la figure 2 est une vue en perspective illustrant un gicleur de refroidissement de piston selon un premier mode de réalisation de l'invention, associé à la tête de serrage d'un bras de robot ;
  • la figure 3 illustre en perspective un gicleur de refroidissement de piston selon un second mode de réalisation de l'invention ; et
  • la figure 4 est une coupe longitudinale du gicleur de la figure 3.
Other objects, features and advantages of the present invention will become apparent from the following description of particular embodiments, with reference to the accompanying drawings, in which:
  • Figure 1 illustrates, in perspective, a piston cooling nozzle structure according to the prior art, with a relatively large between-axis between the piston body and the fixing screw;
  • Figure 2 is a perspective view illustrating a piston cooling nozzle according to a first embodiment of the invention, associated with the clamping head of a robot arm;
  • Figure 3 illustrates in perspective a piston cooling nozzle according to a second embodiment of the invention; and
  • FIG. 4 is a longitudinal section of the nozzle of FIG.

Dans les deux modes de réalisation des figures 2 et 3, ainsi que dans la réalisation connue de la figure 1, le gicleur comprend un corps de gicleur 1 à paroi périphérique généralement cylindrique d'axe I-I et entourant un perçage axial 2 contenant un moyen de clapet 3.In both embodiments of Figures 2 and 3, as well as in the known embodiment of Figure 1, the nozzle comprises a nozzle body 1 wall generally cylindrical peripheral of axis I-I and surrounding an axial bore 2 containing valve means 3.

Par exemple, comme illustré sur la figure 4, le moyen de clapet 3 comporte une vis de fixation 3a dont la tige axiale 3b guide un ressort de compression 3c qui repousse une bille de fermeture 3d contre un siège 3e du corps de gicleur 1. Ainsi la bille 3d peut obturer le perçage axial 2 tant que la pression de fluide de refroidissement à l'entrée 2a du perçage axial 2 n'excède pas un seuil déterminé correspondant à la force de poussée du ressort 3b.For example, as illustrated in Figure 4, the valve means 3 comprises a fixing screw 3a whose axial rod 3b guides a spring of 3c compression that pushes a 3d closure ball against a 3rd body seat nozzle 1. Thus the ball 3d can close the axial bore 2 as the pressure of cooling fluid at the inlet 2a of the axial bore 2 does not exceed a threshold determined corresponding to the thrust force of the spring 3b.

La paroi périphérique 1a du corps de gicleur 1 est traversée d'un perçage transversal 4 communiquant avec le perçage axial 2 et raccordé à un conduit de sortie de fluide de refroidissement 5.The peripheral wall 1a of the nozzle body 1 is traversed by a transverse drilling 4 communicating with the axial bore 2 and connected to a coolant outlet duct 5.

Le corps de gicleur 1 comporte une portion cylindrique d'entrée 1b, coaxiale d'axe I-I, conformée pour son introduction dans un orifice d'amenée de fluide du carter de cylindre moteur.The nozzle body 1 comprises a cylindrical input portion 1b, coaxial axis I-I, shaped for its introduction into a supply port of fluid from the engine cylinder housing.

Une plaque transversale de fixation 6 est associée au corps de gicleur 1 pour assurer sa fixation sur le carter de cylindre moteur. Pour cela, la plaque transversale de fixation 6 comporte un premier trou 6a dans lequel est fixé le corps de gicleur 1, par soudure ou emmanchement, et comporte un second trou 6b décalé latéralement à l'opposé du perçage transversal 4, pour le passage d'une vis de fixation 7 du gicleur sur le carter de cylindre moteur.A transverse fixing plate 6 is associated with the nozzle body 1 to secure it to the engine cylinder cover. For this, the plate transverse fixation 6 has a first hole 6a in which is fixed the body nozzle 1, by welding or fitting, and comprises a second hole 6b offset laterally opposite the transverse bore 4, for the passage of a screw attachment 7 of the nozzle on the engine cylinder housing.

Comme on le voit sur la figure 1, dans les réalisations connues, l'entre-axe E1 entre l'axe I-I du corps de gicleur 1 et l'axe II-II de la vis de fixation 7 doit être suffisant pour laisser un jeu radial entre le corps de gicleur 1 et un outil de vissage que l'on vient engager sur la tête de la vis de fixation 7. C'est la raison pour laquelle l'entre-axe E1 doit être large, ce qui oblige à dimensionner en conséquence la plaque de fixation 6.As can be seen in FIG. 1, in the known embodiments, the inter-axis E1 between the axis I-I of the nozzle body 1 and the axis II-II of the fixing screw 7 must be sufficient to leave a radial clearance between the nozzle body 1 and a tool of screwing that is engaged on the head of the fixing screw 7. This is the reason for which the inter-axis E1 must be wide, which forces to dimension in consequently the fixing plate 6.

En considérant maintenant les figures 2 à 4, montrant l'invention, on voit que l'entre-axe E2 peut être réduit, tout en conservant une épaisseur satisfaisante de la paroi périphérique 1 a dans les zones où cela est nécessaire.Now considering Figures 2 to 4, showing the invention, we see that the inter-axis E2 can be reduced, while maintaining a satisfactory thickness of the peripheral wall 1a in the areas where it is necessary.

Ainsi, sur la figure 4, on voit que la paroi périphérique 1 a présente une épaisseur T qui est supérieure ou égale au diamètre D du perçage transversal 4. De la sorte, le conduit de sortie de fluide de refroidissement 5 peut être un tube rapporté, emmanché en force par son extrémité dans le perçage transversal 4, ce qui suffit à garantir un maintien efficace du conduit de sortie de fluide 5.Thus, in FIG. 4, it can be seen that the peripheral wall 1 has a thickness T which is greater than or equal to the diameter D of the transverse bore 4. In this way, the cooling fluid outlet duct 5 can be a tube reported, force-fitted by its end in the transverse bore 4, this which is sufficient to ensure effective maintenance of the fluid outlet duct 5.

Simultanément, dans la portion diamétralement opposée de la paroi périphérique 1a, c'est-à-dire dans la portion 1c opposée au perçage transversal 4, la paroi périphérique est plus mince du fait de la présence d'un évidement externe 1d au regard du second trou 6b de la plaque transversale de fixation 6. Dans cette zone, on conserve une épaisseur de la portion 1c de paroi périphérique juste suffisante pour les contraintes mécaniques à supporter, et l'évidement externe 1d permet de rapprocher l'axe II-II de la vis de fixation 7.Simultaneously, in the diametrically opposite portion of the wall peripheral 1a, that is to say in the portion 1c opposite to the transverse bore 4, the peripheral wall is thinner due to the presence of an external recess 1d with regard to the second hole 6b of the transverse fixing plate 6. In this zone, one retains a thickness of the portion 1c of peripheral wall just sufficient for the mechanical stresses to withstand, and the external recess 1d allows the axis II-II to be brought closer to the fixing screw 7.

Comme illustré sur la figure 4, l'entre-axe E2 des premier trou 6a et second trou 6b de la plaque transversale de fixation 6, ou entre-axe entre le corps de gicleur 1 et la vis de fixation 7, est juste suffisant pour permettre l'engagement et la rotation d'un outil de vissage 8 sur la tête de la vis de fixation 7 sans contact avec la paroi périphérique 1a du corps de gicleur 1. On laisse, entre l'outil de vissage 8 et le corps de gicleur 1, un jeu fonctionnel qui facilite le mouvement de l'outil de vissage 8 lors de son adaptation et de son retrait par rapport à la vis de fixation 7.As illustrated in FIG. 4, the inter-axis E2 of the first hole 6a and second hole 6b of the transverse attachment plate 6, or between-axis between the body nozzle 1 and the fixing screw 7, is just sufficient to allow the engagement and the rotation of a screwing tool 8 on the head of the fixing screw 7 without contact with the peripheral wall 1a of the nozzle body 1. It is left, between the tool of screwing 8 and the nozzle body 1, a functional game that facilitates the movement of the screwing tool 8 during its adaptation and its withdrawal relative to the screw of fixing 7.

Dans le mode de réalisation des figures 3 et 4, l'évidement externe 1d est une surface cylindrique concave d'axe parallèle à l'axe I-I du corps de gicleur 1 et coaxiale à l'axe II-II de la vis de fixation 7.In the embodiment of FIGS. 3 and 4, the external recess 1d is a concave cylindrical surface with an axis parallel to the axis I-I of the nozzle body 1 and coaxial with the axis II-II of the fixing screw 7.

L'outil de vissage 8 tel qu'illustré est l'extrémité d'un bras de robot à contour externe cylindrique de révolution et à contour intérieur adapté pour la prise de la tête de vis 7.The screwing tool 8 as illustrated is the end of a robot arm to cylindrical outer contour of revolution and inner contour adapted for taking of the screw head 7.

Dans le mode de réalisation illustré sur la figure 2, l'évidement externe 1d est un méplat parallèle à l'axe I-I du corps de gicleur 1.In the embodiment illustrated in FIG. 2, the external recess 1d is a flat parallel to the axis I-I of the nozzle body 1.

La présente invention n'est pas limitée aux modes de réalisation qui ont été explicitement décrits, mais elle en inclut les diverses variantes et généralisations contenues dans le domaine des revendications ci-après.The present invention is not limited to the embodiments which have have been explicitly described, but it includes the various variants and generalizations contained in the field of the claims below.

Claims (5)

Gicleur de refroidissement de piston pour moteur à combustion interne, comprenant : un corps de gicleur (1) à paroi périphérique (1a) entourant un perçage axial (2) contenant un moyen de clapet (3), la paroi périphérique (1a) étant traversée d'un perçage transversal (4) communiquant avec le perçage axial (2) et raccordé à un conduit de sortie de fluide de refroidissement (5), le corps de gicleur (1) comportant une portion cylindrique d'entrée (1b) conformée pour son introduction dans un orifice d'amenée de fluide du carter de cylindre moteur, une plaque transversale de fixation (6), comportant un premier trou (6a) dans lequel est fixé le corps de gicleur (1), et comportant un second trou (6b) décalé latéralement à l'opposé du perçage transversal (4), pour le passage d'une vis de fixation (7) du gicleur sur le carter de cylindre moteur,    caractérisé en ce que : au moins autour du perçage transversal (4), la paroi périphérique (1a) est épaisse, son épaisseur T étant supérieure ou égale au diamètre (D) du perçage transversal (4), dans sa portion (1c) diamétralement opposée au perçage transversal (4), la paroi périphérique (1a) est plus mince du fait de la présence d'un évidement externe (1d) en regard du second trou (6b) de la plaque transversale de fixation (6). Piston cooling nozzle for an internal combustion engine, comprising: a nozzle body (1) with a peripheral wall (1a) surrounding an axial bore (2) containing a valve means (3), the peripheral wall (1a) being traversed by a transverse bore (4) communicating with the axial bore (2) and connected to a cooling fluid outlet duct (5), the nozzle body (1) having a cylindrical inlet portion (1b) shaped for its introduction into a fluid supply port of the housing of engine cylinder, a transverse fixing plate (6), having a first hole (6a) in which is fixed the nozzle body (1), and having a second hole (6b) offset laterally opposite the transverse bore (4), for passing a fixing screw (7) from the nozzle to the engine cylinder casing, characterized in that at least around the transverse bore (4), the peripheral wall (1a) is thick, its thickness T being greater than or equal to the diameter (D) of the transverse bore (4), in its portion (1c) diametrically opposed to the transverse bore (4), the peripheral wall (1a) is thinner due to the presence of an external recess (1d) opposite the second hole (6b) of the transverse plate of fixing (6). Gicleur de refroidissement de piston selon la revendication 1, caractérisé en ce que l'entre-axe (E2) des premier et second trous (6a, 6b) de la plaque transversale de fixation (6) est juste suffisant pour permettre l'engagement et la rotation d'un outil de vissage (8) sur la tête de vis de fixation (7) sans contact avec la paroi périphérique (1a) du corps de gicleur (1).Piston cooling nozzle according to claim 1, characterized in that the inter-axis (E2) of the first and second holes (6a, 6b) of the transverse fixing plate (6) is just sufficient to allow engagement and the rotation of a screwing tool (8) on the fastening screw head (7) without contact with the peripheral wall (1a) of the nozzle body (1). Gicleur de refroidissement de piston selon la revendication 2, caractérisé en ce que l'outil de vissage (8) est l'extrémité d'un bras de robot à contour externe cylindrique de révolution et à contour intérieur adapté pour la prise de la tête de la vis (7).Piston cooling nozzle according to Claim 2, characterized in that the screwing tool (8) is the end of a robot arm with a cylindrical external contour of revolution and an internal contour adapted to grip the head of the piston. the screw (7). Gicleur de refroidissement de piston selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'évidement externe (1d) est un méplat parallèle à l'axe (I-I) du corps de gicleur (1).Piston cooling nozzle according to any one of claims 1 to 3, characterized in that the outer recess (1d) is a flat parallel to the axis (II) of the nozzle body (1). Gicleur de refroidissement de piston selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'évidement externe (1d) est une surface cylindrique concave d'axe parallèle à l'axe (I-I) du corps de gicleur (1) et coaxiale à l'axe (II-II) de la vis de fixation (7).Piston cooling nozzle according to one of Claims 1 to 3, characterized in that the outer recess (1d) is a concave cylindrical surface with an axis parallel to the axis (II) of the nozzle body (1) and coaxial with the axis (II-II) of the fixing screw (7).
EP04356176A 2003-11-04 2004-11-03 Jet for piston cooling with reduced inter-axle Active EP1529935B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313248A FR2861804B1 (en) 2003-11-04 2003-11-04 PISTON COOLING JET WITH REDUCED AXIS
FR0313248 2003-11-04

Publications (2)

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EP1529935A1 true EP1529935A1 (en) 2005-05-11
EP1529935B1 EP1529935B1 (en) 2011-06-01

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EP04356176A Active EP1529935B1 (en) 2003-11-04 2004-11-03 Jet for piston cooling with reduced inter-axle

Country Status (7)

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US (1) US7104225B2 (en)
EP (1) EP1529935B1 (en)
CN (1) CN1287072C (en)
AT (1) ATE511599T1 (en)
AU (1) AU2004226948B2 (en)
BR (1) BRPI0404650A (en)
FR (1) FR2861804B1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
US9476344B2 (en) 2013-04-11 2016-10-25 Bontaz Centre R&D Compact cooling device for an internal combustion engine and method for manufacturing such a device

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Publication number Priority date Publication date Assignee Title
US8397749B2 (en) * 2007-09-07 2013-03-19 Metaldyne Company Llc Piston cooling jet with tracking ball orifice
FR2935771B1 (en) 2008-09-09 2010-10-08 Bontaz Centre Sa DEVICE FOR CONTROLLING THE SUPPLY OF A SYSTEM WITH A FLUID
CN101886570B (en) * 2010-06-02 2012-02-29 奇瑞汽车股份有限公司 Piston cooling spray nozzle structure
CN104533588A (en) * 2014-12-26 2015-04-22 山东华源莱动内燃机有限公司 Piston cooling nozzle
GB201519640D0 (en) * 2015-11-06 2015-12-23 Gm Global Tech Operations Inc Piston cooling jet for an internal combustion engine
FR3109608B1 (en) * 2020-04-22 2023-01-13 Bontaz Centre R & D DOUBLE JET PISTON COOLING JET IN PLASTIC MATERIAL

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DE2938431A1 (en) * 1979-09-22 1981-03-26 Daimler-Benz Aktiengesellschaft, 70567 Stuttgart Supercharged fuel injection IC engine - has pistons cooled by oil injector fixed to flange of crankshaft
US4995346A (en) * 1989-06-28 1991-02-26 Sharon Manufacturing Company Oil jet piston cooler
EP0682175A1 (en) * 1994-05-10 1995-11-15 Bontaz Centre Spray nozzle for piston cooling for an internal combustion engine

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DE2938431A1 (en) * 1979-09-22 1981-03-26 Daimler-Benz Aktiengesellschaft, 70567 Stuttgart Supercharged fuel injection IC engine - has pistons cooled by oil injector fixed to flange of crankshaft
US4995346A (en) * 1989-06-28 1991-02-26 Sharon Manufacturing Company Oil jet piston cooler
EP0682175A1 (en) * 1994-05-10 1995-11-15 Bontaz Centre Spray nozzle for piston cooling for an internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9476344B2 (en) 2013-04-11 2016-10-25 Bontaz Centre R&D Compact cooling device for an internal combustion engine and method for manufacturing such a device

Also Published As

Publication number Publication date
US20050098122A1 (en) 2005-05-12
CN1287072C (en) 2006-11-29
FR2861804B1 (en) 2006-01-20
EP1529935B1 (en) 2011-06-01
US7104225B2 (en) 2006-09-12
CN1614206A (en) 2005-05-11
AU2004226948A1 (en) 2005-05-19
AU2004226948B2 (en) 2007-05-10
ATE511599T1 (en) 2011-06-15
FR2861804A1 (en) 2005-05-06
BRPI0404650A (en) 2005-06-21

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