EP0463900A1 - Lubrication system for the contacting surfaces of a camshaft and a hydraulic tappet for an internal combustion engine - Google Patents

Lubrication system for the contacting surfaces of a camshaft and a hydraulic tappet for an internal combustion engine Download PDF

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Publication number
EP0463900A1
EP0463900A1 EP91401441A EP91401441A EP0463900A1 EP 0463900 A1 EP0463900 A1 EP 0463900A1 EP 91401441 A EP91401441 A EP 91401441A EP 91401441 A EP91401441 A EP 91401441A EP 0463900 A1 EP0463900 A1 EP 0463900A1
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EP
European Patent Office
Prior art keywords
chamber
jacket
tappet
orifice
hydraulic
Prior art date
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Granted
Application number
EP91401441A
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German (de)
French (fr)
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EP0463900B1 (en
Inventor
Jacques Doré
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Automobiles Peugeot SA
Automobiles Citroen SA
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Automobiles Peugeot SA
Automobiles Citroen SA
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Publication of EP0463900A1 publication Critical patent/EP0463900A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces

Definitions

  • the present invention relates to a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine.
  • These pushers generally comprise a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, this chamber being supplied from a source of fluid through a first orifice formed in the side wall of the jacket, when the pusher is in the high position.
  • the object of the invention is therefore to solve these problems by proposing a lubrication system for surfaces in contact with the camshaft and the hydraulic valve which is simple, reliable and which avoids any machining or addition of additional parts in the cylinder head.
  • the subject of the invention is a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine, in which the tappet comprises a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, supplied from a source of fluid through at least one first orifice formed in the side wall of the jacket, when the pusher is in the high position, characterized in that the jacket comprises a second hydraulic chamber, above the first, at least one second orifice opening into the second chamber, formed in its side wall above the first, at a distance corresponding to the stroke of the pusher, so that the second chamber is supplied from the source when the pusher is in the low position, and at least one third orifice formed in its upper wall, opening on the one hand in the second chamber and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.
  • the hydraulic tappets 2 of the prior art have a jacket 8 and a piston assembly 9 used to adjust the clearance of a corresponding valve.
  • This fluid is introduced into this chamber by means of an annular groove 12 formed in the external surface of the side wall of the jacket, and of an orifice 13 opening on the one hand into the chamber 11 and on the other hand into the groove 12, from the feed channel 5 described with reference to FIG. 1.
  • An orifice 14 ( Figure 1), one end of which opens into this channel 5, is also provided in the cylinder head, to supply this chamber with fluid when the pusher is in the high position.
  • FIG. 3 is a sectional view of a pusher used in the constitution of a lubrication system according to the invention, we see that it has the same elements as those described in look of Figure 2 namely a jacket 15, a piston assembly 16, a first annular spacer 17 between the side wall of the jacket and the piston assembly, a first orifice 18 opening into a first annular groove 19 for the supply of a first chamber 20 of fluid necessary for the operation of the piston assembly.
  • the jacket 15 comprises a second hydraulic chamber 21 formed above the first.
  • the first and second hydraulic chambers of this jacket are separated by an annular spacer 22 one end of which is fixed to the interior surface of the side wall of the jacket 15 and the other to the interior surface of the top wall of this jacket.
  • This jacket also has at least a second orifice 23 opening into this second chamber 21, this orifice being formed in the side wall of the shirt, above the first orifice 18 at a distance corresponding to the stroke of the pusher so that the second chamber 21 is supplied from the source 5 when the pusher is in the low position, as will be described in more detail below.
  • This orifice also opens into an annular groove 24 parallel to the groove 19 described above.
  • the jacket also comprises at least a third calibrated orifice 25 formed in its upper wall, this orifice opening on the one hand into the second chamber 21 and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.
  • the annular spacers 17 and 22 can be fixed in any suitable manner in the jacket, for example by crimping or welding by electronic bombardment.
  • This orifice 25 can be determined to precisely direct a certain quantity of fluid on the facing surfaces to obtain optimal lubrication.
  • the annular groove 24 may have several orifices spaced around its periphery to improve the filling of the second chamber.
  • several differently oriented orifices can be provided in the upper wall of the pusher to ensure the simultaneous lubrication of several elements, for example in the case of engines having twin camshafts or valve controls by combined cam / latch devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

This lubrication system, in which the tappet (2) comprises a sleeve (15) having a first hydraulic compression chamber (20) for adjusting the clearance of a corresponding valve, fed from a fluid source by way of at least one first port (18) made in the side wall of the sleeve (15), when the tappet is in the high position, is characterised in that the sleeve (15) has a second hydraulic chamber (21) located above the first, at least one second port (23) opening into the second chamber (21) and made in its side wall above the first at a distance corresponding to the stroke of the tappet, so that the second chamber (21) is fed from the source when the tappet is in the low position, and at least one third port (25) made in its upper wall and opening, on the one hand, into the second chamber (21) and, on the other hand, in the vicinity of the contact surfaces of the cam shaft and of the tappet in order to lubricate them. <IMAGE>

Description

La présente invention concerne un système de lubrification des surfaces en contact d'un arbre à cames et d'un poussoir hydraulique pour un moteur à combustion interne.The present invention relates to a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine.

Ces poussoirs comportent généralement une chemise comprenant une première chambre hydraulique de compression pour le réglage du jeu d'une soupape correspondante, cette chambre étant alimentée à partir d'une source de fluide à travers un premier orifice ménagé dans la paroi latérale de la chemise, lorsque le poussoir est en position haute.These pushers generally comprise a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, this chamber being supplied from a source of fluid through a first orifice formed in the side wall of the jacket, when the pusher is in the high position.

Dans les moteurs à combustion interne, dans lesquels les soupapes sont actionnées par des poussoirs hydrauliques, il est nécessaire de lubrifier les surfaces en contact de l'arbre à cames et du poussoir. Pour cela on crée un bain d'huile dans le fond de la culasse du moteur, ce bain d'huile permettant également d'évacuer les calories dégagées par le frottement des pièces en mouvement.In internal combustion engines, in which the valves are actuated by hydraulic tappets, it is necessary to lubricate the surfaces in contact with the camshaft and the tappet. For this, an oil bath is created in the bottom of the cylinder head of the engine, this oil bath also making it possible to evacuate the calories released by the friction of the moving parts.

Pour alimenter ce bain d'huile on utilise actuellement soit une rampe de lubrification ménagée dans le couvre-culasse ou rapportée à celui-ci, soit un canal d'alimentation des poussoirs hydrauliques en fluide sous pression, ménagé dans la culasse, en pratiquant dans cette culasse des perçages débouchant d'une part dans ce canal et d'autre part, au niveau des cames.To supply this oil bath, we currently use either a lubrication ramp provided in the cylinder head cover or attached to it, or a supply channel for the hydraulic lifters with pressurized fluid, provided in the cylinder head, practicing in this cylinder head of the holes opening on the one hand into this channel and on the other hand, at the level of the cams.

Cependant ces différentes solutions présentent un certain nombre d'inconvénients. En effet elles nécessitent des pièces ou des usinages supplémentaires. Par ailleurs, le débit de fluide est permanent de sorte qu'il peut y avoir surabondance de fluide dans le fond de la culasse ce qui oblige à évacuer le trop plein vers le bac à huile situé dans le bas du moteur.However, these different solutions have a certain number of drawbacks. Indeed they require additional parts or machining. Furthermore, the fluid flow is permanent so that there can be an overabundance of fluid in the bottom of the cylinder head, which means that the overflow must be discharged to the oil tank located at the bottom of the engine.

Le but de l'invention est donc de résoudre ces problèmes en proposant un système de lubrification des surfaces en contact de l'arbre à cames et du poussoir hydraulique qui soit simple, fiable et qui évite tout usinage ou adjonction de pièces supplémentaires dans la culasse.The object of the invention is therefore to solve these problems by proposing a lubrication system for surfaces in contact with the camshaft and the hydraulic valve which is simple, reliable and which avoids any machining or addition of additional parts in the cylinder head.

A cet effet l'invention a pour objet un système de lubrification des surfaces en contact d'un arbre à cames et d'un poussoir hydraulique pour un moteur à combustion interne, dans lequel le poussoir comporte une chemise comprenant une première chambre hydraulique de compression pour le réglage du jeu d'une soupape correspondante, alimentée à partir d'une source de fluide à travers au moins un premier orifice ménagé dans la paroi latérale de la chemise, lorsque le poussoir est en position haute, caractérisé en ce que la chemise comprend une deuxième chambre hydraulique, au-dessus de la première, au moins un deuxième orifice débouchant dans la deuxième chambre, ménagé dans sa paroi latérale au-dessus du premier, à une distance correspondant à la course du poussoir, pour que la deuxième chambre soit alimentée à partir de la source lorsque le poussoir est en position basse, et au moins un troisième orifice ménagé dans sa paroi supérieure, débouchant d'une part dans la deuxième chambre et d'autre part à proximité des surfaces en contact de l'arbre à cames et du poussoir pour les lubrifier.To this end, the subject of the invention is a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine, in which the tappet comprises a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, supplied from a source of fluid through at least one first orifice formed in the side wall of the jacket, when the pusher is in the high position, characterized in that the jacket comprises a second hydraulic chamber, above the first, at least one second orifice opening into the second chamber, formed in its side wall above the first, at a distance corresponding to the stroke of the pusher, so that the second chamber is supplied from the source when the pusher is in the low position, and at least one third orifice formed in its upper wall, opening on the one hand in the second chamber and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.

L'invention sera mieux comprise à l'aide de la description qui va suivre donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels :

  • La figure 1 est une vue en coupe d'une partie d'un moteur à combustion interne illustrant différents systèmes de lubrification d'un arbre à cames et d'un poussoir, de l'état de la technique ;
  • la figure 2 est une vue en coupe partielle d'un poussoir hydraulique de l'état de la technique ;
  • la figure 3 est une vue en coupe partielle d'un poussoir hydraulique entrant dans la constitution d'un système de lubrification selon l'invention ; et
  • les figures 4 et 5 illustrent le fonctionnement d'un système de lubrification selon l'invention.
The invention will be better understood with the aid of the description which follows, given solely by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a sectional view of a portion of an internal combustion engine illustrating different lubrication systems of a camshaft and a tappet, of the prior art;
  • Figure 2 is a partial sectional view of a hydraulic plunger of the prior art;
  • Figure 3 is a partial sectional view of a hydraulic tappet forming part of a lubrication system according to the invention; and
  • Figures 4 and 5 illustrate the operation of a lubrication system according to the invention.

Ainsi qu'on peut le voir sur la figure 1, et comme cela a déjà été mentionné, pour alimenter le bain d'huile créé dans le fond de la culasse pour lubrifier les surfaces en contact d'un arbre à cames 1 et d'un poussoir hydraulique 2, on utilise dans l'état de la technique soit une rampe de lubrification 3 ménagée dans le couvre-culasse 4 ou rapportée à celui-ci, soit le canal 5 d'alimentation des poussoirs hydrauliques en fluide sous pression, en pratiquant dans la culasse 6 des perçages 7. Une extrémité de ces perçages débouche dans ce canal et l'autre, au niveau des cames. Ainsi qu'on l'a mentionné précédemment ces différentes solutions présentent un certain nombre d'inconvénients qui ne seront pas rappelés.As can be seen in Figure 1, and as already mentioned, to supply the oil bath created in the bottom of the cylinder head to lubricate the contact surfaces of a camshaft 1 and a hydraulic tappet 2, in the state of the art, either a lubrication ramp 3 formed in the cylinder head cover 4 or attached to it, or the channel 5 for supplying the hydraulic tappets with pressurized fluid, practicing in the cylinder head 6 of the holes 7. One end of these holes opens into this channel and the other, at the level of the cams. As previously mentioned, these different solutions have a certain number of drawbacks which will not be recalled.

Les poussoirs hydrauliques 2 de l'état de la technique, dont un est représenté sur la figure 2, comportent une chemise 8 et un ensemble à piston 9 servant à régler le jeu d'une soupape correspondante. Une entretoise annulaire 10 disposée entre l'ensemble à piston 9 et la paroi latérale de la chemise 8, délimite une chambre annulaire 11 destinée à contenir le fluide hydraulique nécessaire au fonctionnement du poussoir. Ce fluide est introduit dans cette chambre au moyen d'une gorge annulaire 12 pratiquée dans la surface extérieure de la paroi latérale de la chemise, et d'un orifice 13 débouchant d'une part dans la chambre 11 et d'autre part dans la gorge 12, à partir du canal d'alimentation 5 décrit en regard de la figure 1.The hydraulic tappets 2 of the prior art, one of which is shown in Figure 2, have a jacket 8 and a piston assembly 9 used to adjust the clearance of a corresponding valve. An annular spacer 10 disposed between the piston assembly 9 and the side wall of the jacket 8, delimits an annular chamber 11 intended to contain the hydraulic fluid necessary for the operation of the pusher. This fluid is introduced into this chamber by means of an annular groove 12 formed in the external surface of the side wall of the jacket, and of an orifice 13 opening on the one hand into the chamber 11 and on the other hand into the groove 12, from the feed channel 5 described with reference to FIG. 1.

Un orifice 14 (Figure 1) dont une extrémité débouche dans ce canal 5, est également prévu dans la culasse, pour alimenter cette chambre en fluide lorsque le poussoir est en position haute.An orifice 14 (Figure 1), one end of which opens into this channel 5, is also provided in the cylinder head, to supply this chamber with fluid when the pusher is in the high position.

Si l'on se reporte maintenant à la figure 3 qui est une vue en coupe d'un poussoir entrant dans la constitution d'un système de lubrification selon l'invention, on constate que celui-ci comporte les mêmes éléments que ceux décrits en regard de la figure 2 à savoir une chemise 15, un ensemble à piston 16, une première entretoise annulaire 17 entre la paroi latérale de la chemise et l'ensemble à piston, un premier orifice 18 débouchant dans une première gorge annulaire 19 pour l'alimentation d'une première chambre 20 de fluide nécessaire au fonctionnement de l'ensemble à piston. Selon l'invention, la chemise 15 comprend une seconde chambre hydraulique 21 ménagée au-dessus de la première. Les première et seconde chambres hydrauliques de cette chemise sont séparées par une entretoise annulaire 22 dont une extrémité est fixée sur la surface intérieure de la paroi latérale de la chemise 15 et l'autre, sur la surface intérieure de la paroi supérieure de cette chemise.If we now refer to Figure 3 which is a sectional view of a pusher used in the constitution of a lubrication system according to the invention, we see that it has the same elements as those described in look of Figure 2 namely a jacket 15, a piston assembly 16, a first annular spacer 17 between the side wall of the jacket and the piston assembly, a first orifice 18 opening into a first annular groove 19 for the supply of a first chamber 20 of fluid necessary for the operation of the piston assembly. According to the invention, the jacket 15 comprises a second hydraulic chamber 21 formed above the first. The first and second hydraulic chambers of this jacket are separated by an annular spacer 22 one end of which is fixed to the interior surface of the side wall of the jacket 15 and the other to the interior surface of the top wall of this jacket.

Cette chemise comporte également au moins un second orifice 23 débouchant dans cette seconde chambre 21, cet orifice étant ménagé dans la paroi latérale de la chemise, au-dessus du premier orifice 18 à une distance correspondant à la course du poussoir pour que la seconde chambre 21 soit alimentée à partir de la source 5 lorsque le poussoir est en position basse, comme cela sera décrit plus en détail par la suite. Cet orifice débouche également dans une gorge annulaire 24 parallèle à la gorge 19 décrite précédemment.This jacket also has at least a second orifice 23 opening into this second chamber 21, this orifice being formed in the side wall of the shirt, above the first orifice 18 at a distance corresponding to the stroke of the pusher so that the second chamber 21 is supplied from the source 5 when the pusher is in the low position, as will be described in more detail below. This orifice also opens into an annular groove 24 parallel to the groove 19 described above.

La chemise comporte également au moins un troisième orifice calibré 25 ménagé dans sa paroi supérieure, cet orifice débouchant d'une part dans la seconde chambre 21 et d'autre part à proximité des surfaces en contact de l'arbre à cames et du poussoir pour les lubrifier.
Il est à noter que les entretoises annulaires 17 et 22 peuvent être fixées de toutes manières appropriées dans la chemise comme par exemple par sertissage ou soudage par bombardement électronique.The jacket also comprises at least a third calibrated orifice 25 formed in its upper wall, this orifice opening on the one hand into the second chamber 21 and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.
It should be noted that the annular spacers 17 and 22 can be fixed in any suitable manner in the jacket, for example by crimping or welding by electronic bombardment.

Comme on peut le voir sur la figure 4, lorsque le poussoir 2 est en position haute, le conduit d'alimentation 5 et l'orifice 14 débouchant dans celui-ci sont en regard de l'orifice 18 ménagé dans la paroi latérale de la chemise 15, cet orifice débouchant dans la chambre 20 de fluide sous pression nécessaire pour le réglage du jeu d'une soupape correspondante. Par contre si le poussoir est en position basse (figure 5) le canal 5 d'alimentation en fluide et l'orifice 14 débouchant dans celui-ci, sont en regard du conduit 23 d'alimentation de la seconde chambre 21. Ainsi dans cette position du poussoir la source de fluide alimente cette seconde chambre 21, le fluide sous pression s'échappant de cette chambre par l'orifice 25 ménagé dans la paroi supérieure de la chemise à proximité des surfaces en contact de l'arbre à cames et du poussoir, pour lubrifier celles-ci.As can be seen in FIG. 4, when the pusher 2 is in the high position, the supply conduit 5 and the orifice 14 opening into it are opposite the orifice 18 formed in the side wall of the jacket 15, this orifice opening into the chamber 20 of pressurized fluid necessary for adjusting the clearance of a corresponding valve. On the other hand, if the pusher is in the low position (FIG. 5) the channel 5 for supplying fluid and the orifice 14 opening into it, are opposite the conduit 23 supplying the second chamber 21. Thus in this position of the plunger the source of fluid feeds this second chamber 21, the pressurized fluid escaping from this chamber through the orifice 25 formed in the upper wall of the jacket near the surfaces in contact with the camshaft and the pusher, to lubricate them.

L'orientation et la dimension de cet orifice 25 peuvent être déterminées pour diriger avec précision une certaine quantité de fluide sur les surfaces en regard pour obtenir une lubrification optimale.The orientation and dimension of this orifice 25 can be determined to precisely direct a certain quantity of fluid on the facing surfaces to obtain optimal lubrication.

Il est ainsi possible de maîtriser le débit de fluide de lubrification en direction de ces surfaces dans la mesure où ce débit ne se fait dans chaque chambre que durant une partie du temps de travail. Cette structure permet d'éviter tout usinage ou adjonction de pièces supplémentaires dans la culasse ou le couvre-culasse et ne demande qu'une modification mineure du poussoir.It is thus possible to control the flow of lubrication fluid towards these surfaces insofar as this flow takes place in each chamber only during part of the working time. This structure makes it possible to avoid any machining or the addition of additional parts in the cylinder head or the cylinder head cover and requires only a minor modification of the pusher.

Il va de soi bien entendu que d'autres modes de réalisation peuvent être envisagés. Ainsi par exemple la gorge annulaire 24 (Figure 3) peut comporter plusieurs orifices espacés sur son pourtour pour améliorer le remplissage de la seconde chambre. De même plusieurs orifices orientés de manière différente peuvent être prévus dans la paroi supérieure du poussoir pour assurer la lubrification simultanée de plusieurs éléments par exemple dans le cas de moteurs ayant des arbres à cames jumelés ou des commandes de soupapes par dispositifs combinés cames/linguets.It goes without saying of course that other modes of realization can be considered. Thus, for example, the annular groove 24 (FIG. 3) may have several orifices spaced around its periphery to improve the filling of the second chamber. Likewise, several differently oriented orifices can be provided in the upper wall of the pusher to ensure the simultaneous lubrication of several elements, for example in the case of engines having twin camshafts or valve controls by combined cam / latch devices.

Claims (4)

Système de lubrification des surfaces en contact d'un arbre à cames et d'un poussoir hydraulique pour un moteur à combustion interne, dans lequel le poussoir (2) comporte une chemise (15) comprenant une première chambre hydraulique de compression (20) pour le réglage du jeu d'une soupape correspondante, alimentée à partir d'une source de fluide (5) à travers au moins un premier orifice (18) ménagé dans la paroi latérale de la chemise (15), lorsque le poussoir est en position haute, caractérisé en ce que la chemise (15) comprend une seconde chambre hydraulique (21), au-dessus de la première, au moins un second orifice (23) débouchant dans la seconde chambre (21), ménagé dans sa paroi latérale au-dessus du premier à une distance correspondant à la course du poussoir, pour que la seconde chambre (21) soit alimentée à partir de la source (5) lorsque le poussoir est en position basse et au moins un troisième orifice (25) ménagé dans sa paroi supérieure, débouchant d'une part dans la seconde chambre (21) et d'autre part à proximité des surfaces en contact de l'arbre à cames et du poussoir pour les lubrifier.System for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine, in which the tappet (2) comprises a jacket (15) comprising a first hydraulic compression chamber (20) for adjusting the clearance of a corresponding valve, supplied from a source of fluid (5) through at least one first orifice (18) formed in the side wall of the jacket (15), when the pusher is in position high, characterized in that the jacket (15) comprises a second hydraulic chamber (21), above the first, at least one second orifice (23) opening into the second chamber (21), formed in its side wall at the above the first at a distance corresponding to the stroke of the pusher, so that the second chamber (21) is supplied from the source (5) when the pusher is in the low position and at least one third orifice (25) formed in its upper wall, opening on the one hand in the second chamber (21) and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them. Système de lubrification selon la revendication 1, caractérisé en ce que le second orifice (23) débouche dans une gorge annulaire (24) ménagée dans la surface extérieure de la paroi latérale de la chemise (15).Lubrication system according to claim 1, characterized in that the second orifice (23) opens into an annular groove (24) formed in the outer surface of the side wall of the jacket (15). Système de lubrification selon les revendications 1 ou 2, caractérisé en ce que les première et seconde chambres (20, 21) de la chemise (15) sont séparées par une entretoise annulaire (22) dont une extrémité est fixée sur la surface intérieure de la paroi latérale de la chemise (15) et l'autre sur la surface intérieure de la paroi supérieure de la chemise.Lubrication system according to claims 1 or 2, characterized in that the first and second chambers (20, 21) of the jacket (15) are separated by an annular spacer (22), one end of which is fixed to the inner surface of the side wall of the liner (15) and the other on the inner surface of the upper wall of the liner. Système de lubrification selon l'une quelconque des revendications précédentes, caractérisé en ce que plusieurs orifices d'orientation différente sont ménagés dans la paroi supérieure de la chemise.Lubrication system according to any one of the preceding claims, characterized in that several orifices of different orientation are formed in the upper wall of the jacket.
EP19910401441 1990-06-22 1991-06-03 Lubrication system for the contacting surfaces of a camshaft and a hydraulic tappet for an internal combustion engine Expired - Lifetime EP0463900B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007858A FR2663683B1 (en) 1990-06-22 1990-06-22 SYSTEM FOR LUBRICATING SURFACES IN CONTACT WITH A CAMSHAFT AND A HYDRAULIC TAPPET FOR AN INTERNAL COMBUSTION ENGINE.
FR9007858 1990-06-22

Publications (2)

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EP0463900A1 true EP0463900A1 (en) 1992-01-02
EP0463900B1 EP0463900B1 (en) 1993-09-29

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EP19910401441 Expired - Lifetime EP0463900B1 (en) 1990-06-22 1991-06-03 Lubrication system for the contacting surfaces of a camshaft and a hydraulic tappet for an internal combustion engine

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EP (1) EP0463900B1 (en)
DE (1) DE69100427T2 (en)
FR (1) FR2663683B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2826403A1 (en) * 2001-06-21 2002-12-27 Peugeot Citroen Automobiles Sa I.C. engine valve push rod comprises cup, sliding in cylinder, having cylindrical sleeve and cam support plate, cup interior volume separated into pushrod fluid supply compartment and plate lubricating chamber

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380440A (en) * 1967-06-05 1968-04-30 Niel C. Thuesen Oil-damped valve-seating compensator
FR2006542A1 (en) * 1968-04-19 1969-12-26 Motomak
FR2562157A1 (en) * 1984-03-31 1985-10-04 Motomak CUP-SHAPED HOOD FOR VALVE PUSH-BUTTON WITH AUTOMATIC HYDRAULIC ADJUSTMENT, FOR INTERNAL COMBUSTION ENGINES WITH CAMSHAFT IN HEAD
DE3603938A1 (en) * 1986-02-07 1987-08-13 Bayerische Motoren Werke Ag Timing gear case designed separately from the cylinder head of an internal combustion engine

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
JPS6019903A (en) * 1983-07-14 1985-02-01 Toyota Motor Corp Valve operating device in internal-combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380440A (en) * 1967-06-05 1968-04-30 Niel C. Thuesen Oil-damped valve-seating compensator
FR2006542A1 (en) * 1968-04-19 1969-12-26 Motomak
FR2562157A1 (en) * 1984-03-31 1985-10-04 Motomak CUP-SHAPED HOOD FOR VALVE PUSH-BUTTON WITH AUTOMATIC HYDRAULIC ADJUSTMENT, FOR INTERNAL COMBUSTION ENGINES WITH CAMSHAFT IN HEAD
DE3603938A1 (en) * 1986-02-07 1987-08-13 Bayerische Motoren Werke Ag Timing gear case designed separately from the cylinder head of an internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 139 (M-387)(1862) 14 juin 1985, & JP-A-60 019903 (TOYOTA JIDOSHA K.K.) 1 février 1985 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2826403A1 (en) * 2001-06-21 2002-12-27 Peugeot Citroen Automobiles Sa I.C. engine valve push rod comprises cup, sliding in cylinder, having cylindrical sleeve and cam support plate, cup interior volume separated into pushrod fluid supply compartment and plate lubricating chamber

Also Published As

Publication number Publication date
EP0463900B1 (en) 1993-09-29
DE69100427T2 (en) 1994-02-17
DE69100427D1 (en) 1993-11-04
FR2663683A1 (en) 1991-12-27
FR2663683B1 (en) 1992-10-09

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