EP1751403B1 - Valve actuating device - Google Patents

Valve actuating device Download PDF

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Publication number
EP1751403B1
EP1751403B1 EP05762748A EP05762748A EP1751403B1 EP 1751403 B1 EP1751403 B1 EP 1751403B1 EP 05762748 A EP05762748 A EP 05762748A EP 05762748 A EP05762748 A EP 05762748A EP 1751403 B1 EP1751403 B1 EP 1751403B1
Authority
EP
European Patent Office
Prior art keywords
control member
valve
casing
valves
meshing
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.)
Not-in-force
Application number
EP05762748A
Other languages
German (de)
French (fr)
Other versions
EP1751403A1 (en
Inventor
Didier Girard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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Filing date
Publication date
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP1751403A1 publication Critical patent/EP1751403A1/en
Application granted granted Critical
Publication of EP1751403B1 publication Critical patent/EP1751403B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
    • F01L9/21—Valve-gear or valve arrangements actuated non-mechanically by electric means actuated by solenoids
    • F01L2009/2132—Biasing means
    • F01L2009/2134—Helical springs
    • F01L2009/2136—Two opposed springs for intermediate resting position of the armature
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution

Definitions

  • the invention relates to a device for actuating valves.
  • the invention relates more particularly to a device for actuating at least one pair of internal combustion engine valves arranged in a housing of the type comprising, for each valve, magnetization means, at least one spring urging the valve towards a position of equilibrium and comprising a fixed end made integral with an adjustable stop and a movable end made integral in translation with the valve, the adjustable stop comprising meshing means able to cooperate with meshing means conjugated with a control member to allow movement of the stop relative to the housing, so as to adjust the spring tare.
  • Such a device is described in the document WO0065203A1 .
  • the device described in this document uses a tool inserted between two adjacent valve actuators.
  • the tool consists of a rod provided at its end with a portion of disk whose edge presents a toothed sector.
  • the tooth sector of the tool is intended to mesh with a toothed wheel whose rotation controls the movement of a movable element secured to one end of a spring.
  • the tool must be introduced with a certain orientation in the device, to allow the toothed sector to enter the device.
  • the tool is then moved laterally towards the toothed wheel of the moving assembly associated with a spring.
  • the toothed sector must then be brought blindly into a meshing position with the toothed wheel. In this difficult position to reach, the toothed sector can be rotated to perform the adjustment of the spring tare.
  • the tool having adjusted a first spring must be moved laterally to mesh with the adjacent gear according to the same procedure.
  • valve control device therefore generates complex adjustment operations that are difficult to match with large-scale industrial production.
  • complexity of the operations required to adjust the tare of the springs is likely to cause adjustment errors.
  • An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.
  • the actuating device is essentially characterized in that the control member is permanently placed in the housing of adjacent to the adjustable stops of the two valves of the same pair, the housing comprising means for guiding and positioning the control member selectively in two meshing positions respectively with the two adjustable stops.
  • FIG. 1 illustrates an example of an actuator of such a valve called “electromagnetic valve”.
  • the actuator conventionally comprises a movable portion consisting of a rod 14 whose one end is secured to a pallet 3 disposed between two electromagnets 4, 5 (see also Figure 4). The other end of the movable rod 14 bears on the end of the stem of the valve 1
  • Two upper and lower springs 7 and 6 are counter-mounted on the rod / valve assembly 14, 1 so as to bias this assembly towards an equilibrium position (position shown in FIG. 1).
  • Each of the springs 6, 7 comprises a fixed end made integral with a fixed abutment and a movable end made integral in translation directly or indirectly with the valve and / or the movable rod 14.
  • the pallet 3 is subjected to the action of the electromagnets 4, 5, so as to move and lock the valve 1 in the open or closed position.
  • the pallet 3 and the valve 1 can be balanced by the springs 6, 7 between the two open and closed positions.
  • the tare of the springs 5, 6 must be adjusted so that when the electromagnets 4, 5 are not activated, the valve 1 and the pallet 3 are arranged in the equilibrium position between the open and closed positions.
  • the soup control mechanism 1 is generally integrated in a housing 2 called "actuator" which is mounted directly or indirectly on the cylinder head 19 of an internal combustion engine.
  • Figures 3 and 4 shows a part of the mechanism of Figure 1.
  • the elements identical to those described above are designated by the same reference numerals and will not be described in detail a second time.
  • the upper spring 6 of the mechanism has a first moving lower end which is secured to the movable rod 14 by means of a lower cup 20 and a conical hooking device 21.
  • the upper end spring 6 is made integral with a bearing washer 46 comprising, for example, three rings (see Figure 5).
  • the bearing washer 46 is itself mounted on a threaded ring 36 screwed onto the external thread of a cylindrical sleeve 26.
  • the sleeve 26 is mounted free to rotate and locked in translation relative to the housing 2. More specifically, the sleeve 26 has at its upper end a flange bearing against the body of the actuator (electromagnet 5 for example) by the intermediate of a bearing washer 22. A toothing is formed on the outer edge of the flange of the sleeve 26 (see Figure 5 in particular).
  • the threaded ring 36 is locked in rotation with respect to the housing 2.
  • the threaded ring 36 has shoulders 23 which engage in housings in the body of the casing 2 and prevent rotation of the casing. the ring 36 around its axis.
  • the bushing rotation 26 causes the tapped ring 36 to move towards said bushing 26.
  • the direction of movement of the tapped bushing 36 along the sleeve 26 is determined by the direction of rotation of the sleeve 26.
  • the assembly consisting of the sleeve 26, the threaded ring 36 and the bearing washer 46 form a stop 16 adjustable for the upper end of the spring 6 as described in more detail below.
  • the toothing of the bushing 26 is intended to cooperate with a complementary thread of a control member 10 of oblong shape preferably.
  • the housing 2 comprises a housing 11 for the member 10 located near the adjustable stops 16 of the two valves 1 of the same pair of valves.
  • the control member 10 comprises, for example, a rod-shaped body and a toothed wheel 8 formed at one end of the body.
  • the control member 10 is preferably placed permanently in the housing 2.
  • the housing 11 of the housing 2 is shaped to guide the control member 10, so as to enable it to be moved selectively in two meshing positions respectively with the two adjustable stops 16.
  • the abutments 16 and the control member 10 cooperate in meshing during their respective rotation.
  • the respective axes of rotation of the abutment 16 and the control member 10 are substantially parallel.
  • the control member 10 is slidably mounted in the housing 2 in the direction of the longitudinal axis of symmetry of its body. In addition, this direction of sliding of the control member 10 is preferably parallel to the directions of movement of the mobile rods 14 resting on the valves 1.
  • the housing 11 for the control member 10 opens on one side of the housing 2 so as to allow the end of the member 10 located opposite the gear 8 to flush outwardly of the housing 2
  • This flush end of the control member 10 has coupling means 25, such as a fingerprint or a suitable shape for coupling with an external adjusting member (not shown).
  • the adjustment member may be, for example, a socket or a key manipulated manually by an operator or by a robot.
  • the two adjustable stops 16 of the pair of valves 1 are respectively located in two distinct planes offset in a main direction of movement of the control member 10 (see Figure 4).
  • the gears of the two adjustable stops 16 may be located in distinct planes that are slightly offset in the direction of movement of the control member.
  • a small shift of the gears as described above makes it possible to arrange the control member 10 in a third so-called deactivated position in which the control member 10 meshes at the same time with the two adjustable stops 16 of a pair of valves 1 In this configuration the rotation of the stops 16 and the member 10 is "self-locking".
  • Means 15, 17 for locking the control member 10 in the deactivated position may be provided. As illustrated in FIGS. 6 and 9 in particular, these locking means may comprise a set screw 15 mounted in a tapping of the casing 2 and whose end is able to engage in a conjugate groove 17 formed on the body of the casing. control member 10.
  • Elastic means such as a spring 24 may also be mounted on the control member 10 so as to bias the latter towards one of the meshing positions.
  • the spring 24 is threaded onto the body of the control member 10 and has one end bearing on a circlip 27 mounted on the same body of the member 10. The other end of the spring 24 can come to bear on a shoulder formed by the housing 11 for the member 10 inside the housing 2.
  • the actuator 2 can be arranged so that the control member 10 is locked in its deactivated position. That is to say that the body of the control member is blocked by the set screw 15 so that the toothed wheel 8 of the control member 10 meshes with the two adjustable stops at the same time (position shown in FIG. Figure 8).
  • the device can be dimensioned so that the spring 24 places the member 10 in a high equilibrium position in which the toothed wheel 8 meshes only with the toothing of the bushing 26 of the adjustable stop 16 of the first spring 6 ( position shown in Figure 10).
  • control member 10 can then be pivoted by means of a control member as described above, so as to adjust the tare of the spring 6 concerned.
  • the adjusting member can be coupled to the control member by exerting on the latter a pressure towards 2.
  • the control member 10 is thus translated downwards in the housing 2 to a low position in which the toothed wheel 8 meshes this time only with the thread of the bushing 26 of the stop adjustable 16 of the second spring (position not shown in the figures for the sake of concision)
  • the housing 2 can form a stop for the control member 10 limiting its movement towards the inside of the housing 2, at this low position.
  • the set needle screw 15 can again be tightened to ensure a stable adjustment of the springs 6.
  • the system can be dimensioned so that, from the high equilibrium position, the tightening the needle screw causes the automatic translation of the control member 10 to the deactivated position.
  • the locking screw 15 can cooperate with inclined planes formed by the groove 17 of the body of the control member 10
  • control device allows, in a reduced volume to guarantee a simple and reliable adjustable valve springs.
  • the invention is of course not limited to the embodiment described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Lift Valve (AREA)
  • Multiple-Way Valves (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The invention relates to an actuating device that actuates at least one valve pair (1) of an internal combustion engine, housed inside a housing (2) comprising, for each valve (1), magnetizing means (4, 5), at least one spring (6) that acts upon the valve (1), and comprising a fixed end connected to an adjustable stop (16), and a moving end connected in a translatory manner to the valve (1), the adjustable stop (16) comprising meshing means (26) that can interact with mating meshing means (8) of a control element (10) whereby adjusting the tare of the spring (6). The invention is characterized in that the control element (10) is placed in a fixed manner inside the housing (2) next to the adjustable stops (16) of the two valves (1) of the same pair. The housing (2) comprises means for selectively guiding and positioning the control element (10) in two meshing positions respectively with the two adjustable stops (16).

Description

L'invention se rapporte à un dispositif d'actionnement de soupapes.The invention relates to a device for actuating valves.

L'invention concerne plus particulièrement un dispositif d'actionnement d'au moins une paire de soupapes de moteur à combustion interne disposé dans un boîtier du type comportant, pour chaque soupape, des moyens d'aimantation, au moins un ressort sollicitant la soupape vers une position d'équilibre et comprenant une extrémité fixe rendue solidaire d'une butée réglable et une extrémité mobile rendue solidaire en translation de la soupape, la butée réglable comportant des moyens d'engrènement aptes à coopérer avec des moyens d'engrènement conjugués d'un organe de commande pour permettre le déplacement de la butée par rapport au boîtier, de façon à régler la tare du ressort.The invention relates more particularly to a device for actuating at least one pair of internal combustion engine valves arranged in a housing of the type comprising, for each valve, magnetization means, at least one spring urging the valve towards a position of equilibrium and comprising a fixed end made integral with an adjustable stop and a movable end made integral in translation with the valve, the adjustable stop comprising meshing means able to cooperate with meshing means conjugated with a control member to allow movement of the stop relative to the housing, so as to adjust the spring tare.

Un tel dispositif est décrit dans le document WO0065203A1 . Pour effectuer le réglage de la tare des ressorts de soupapes, le dispositif décrit dans ce document utilise un outil introduit entre deux actionneurs de soupapes adjacents L'outil est constitué d'une tige pourvue à son extrémité d'une portion de disque dont la bordure présente un secteur denté. Le secteur denté de l'outil est destiné à s'engrener avec une roue dentée dont la rotation commande le déplacement d'un équipage mobile solidaire d'une extrémité d'un ressort.Such a device is described in the document WO0065203A1 . In order to adjust the tare of the valve springs, the device described in this document uses a tool inserted between two adjacent valve actuators. The tool consists of a rod provided at its end with a portion of disk whose edge presents a toothed sector. The tooth sector of the tool is intended to mesh with a toothed wheel whose rotation controls the movement of a movable element secured to one end of a spring.

Cependant, le réglage de la tare d'un ressort selon ce dispositif connu est malaisé. En effet, l'outil doit être introduit avec une certaine orientation dans le dispositif, pour permettre au secteur denté de pénétrer dans le dispositif. L'outil est ensuite déplacé latéralement vers la roue dentée de l'équipage mobile associé à un ressort. Le secteur denté doit ensuite être amené en aveugle dans une position d'engrènement avec la roue dentée. Dans cette position difficile à atteindre, le secteur denté peut être mis en rotation pour effectuer le réglage de la tare du ressort. Lorsque les ressorts de deux soupapes adjacentes doivent être réglés, l'outil ayant assuré le réglage d'un premier ressort doit être déplacé latéralement pour engrener avec la roue dentée adjacente selon la même procédure.However, adjusting the tare of a spring according to this known device is difficult. Indeed, the tool must be introduced with a certain orientation in the device, to allow the toothed sector to enter the device. The tool is then moved laterally towards the toothed wheel of the moving assembly associated with a spring. The toothed sector must then be brought blindly into a meshing position with the toothed wheel. In this difficult position to reach, the toothed sector can be rotated to perform the adjustment of the spring tare. When the springs of two adjacent valves are to be adjusted, the tool having adjusted a first spring must be moved laterally to mesh with the adjacent gear according to the same procedure.

La structure d'un tel dispositif de commande de soupape engendre donc des opérations de réglage complexes qui sont difficilement compatibles avec une production industrielle à grande échelle. De plus, la complexité des opérations nécessaires au réglage de la tare des ressorts est susceptible d'entraîner des erreurs de réglage.The structure of such a valve control device therefore generates complex adjustment operations that are difficult to match with large-scale industrial production. In addition, the complexity of the operations required to adjust the tare of the springs is likely to cause adjustment errors.

Un but de la présente invention est de pallier tout ou partie des inconvénients de l'art antérieur relevés ci-dessus.An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.

A cette fin, le dispositif d'actionnement selon l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que l'organe de commande est placé à demeure dans le boîtier de façon adjacente aux butées réglables des deux soupapes d'une même paire, le boîtier comportant des moyens de guidage et de positionnement de l'organe de commande sélectivement dans deux positions d'engrènement respectivement avec les deux butées réglables.To this end, the actuating device according to the invention, moreover in accordance with the generic definition given in the preamble above, is essentially characterized in that the control member is permanently placed in the housing of adjacent to the adjustable stops of the two valves of the same pair, the housing comprising means for guiding and positioning the control member selectively in two meshing positions respectively with the two adjustable stops.

Par ailleurs, l'invention peut comporter l'une ou plusieurs des caractéristiques suivantes :

  • les deux butées réglables d'une paire de soupapes sont situées dans des plans distincts décalés selon une direction de déplacement principal de l'organe de commande,
  • le dispositif comporte des moyens de blocage de l'organe de commande dans une position désactivée interdisant le déplacement d'une butée réglable,
  • la position désactivée correspond à un engrènement simultané de l'organe de commande avec les deux butées réglables d'une paire de soupapes,
  • les moyens de blocage de l'organe comportent un axe mobile dans le boîtier apte à coopérer avec le corps de l'organe de commande,
  • l'organe de commande est monté coulissant dans le boîtier,
  • la direction de coulissement de l'organe de commande est sensiblement parallèle aux directions de déplacements soupapes,
  • la butée et l'organe de commande coopèrent en engrènement lors de leur rotation respective, et lorsque l'organe de commande est dans une position d'engrènement, les axes de rotation respectifs de la butée et l'organe de commande sont sensiblement parallèles
  • la butée comporte d'une bague taraudée montée sur le filetage extérieur d'une douille pourvue des moyens d'engrènement, la douille étant montée libre en rotation et bloquée en translation par rapport au boîtier, la bague taraudée étant bloquée en rotation par rapport au boîtier, de façon que la rotation de la douille entraîne le déplacement de la bague taraudée le long de ladite douille,
  • la douille a une forme générale d'un tube cylindrique dont une extrémité comporte une collerette, et en ce que les moyens d'engrènement sont formés sur la collerette,
  • les moyens de guidage et de positionnement comportent des moyens élastique sollicitant l'organe de commande vers l'une des positions d'engrènement,
  • l'organe de commande comporte un corps en forme de tige et une roue dentée formée au niveau d'une des extrémité du corps,
  • l'organe de commande a une extrémité sensiblement affleurante au niveau d'une face du boîtier et comportant des moyens d'accouplement avec un organe de réglage,
  • le dispositif comprend, pour chaque soupape, une palette rendue solidaire en translation de la tige de la soupape, la palette étant disposée entre deux moyens d'aimantation, le dispositif comportant également deux ressorts antagonistes sollicitant l'ensemble soupape/palette vers une position d'équilibre.
In addition, the invention may include one or more of the following features:
  • the two adjustable stops of a pair of valves are located in separate planes offset in a direction of main displacement of the control member,
  • the device comprises means for locking the control member in a deactivated position preventing the displacement of an adjustable stop,
  • the deactivated position corresponds to a simultaneous meshing of the control member with the two adjustable stops of a pair of valves,
  • the locking means of the member comprise an axis movable in the housing adapted to cooperate with the body of the control member,
  • the control member is slidably mounted in the housing,
  • the sliding direction of the control member is substantially parallel to the valve displacement directions,
  • the abutment and the control member cooperate in meshing during their respective rotation, and when the control member is in a meshing position, the respective axes of rotation of the abutment and the control member are substantially parallel;
  • the abutment comprises a threaded ring mounted on the outer thread of a sleeve provided with meshing means, the sleeve being rotatably mounted and locked in translation relative to the housing, the threaded ring being locked in rotation with respect to the casing, so that the rotation of the sleeve causes the displacement of the threaded ring along said sleeve,
  • the sleeve has a general shape of a cylindrical tube whose one end comprises a flange, and in that the meshing means are formed on the flange,
  • the guide and positioning means comprise resilient means urging the control member towards one of the meshing positions,
  • the control member comprises a rod-shaped body and a toothed wheel formed at one end of the body,
  • the control member has a substantially flush end at a face of the housing and having means for coupling with a control member,
  • the device comprises, for each valve, a pallet made integral in translation with the valve stem, the pallet being disposed between two magnetization means, the device also comprising two opposing springs urging the valve / pallet assembly towards a position of 'balanced.

D'autres particularités et avantages apparaîtront à la lecture de la description ci-après, faite en référence aux figures dans lesquelles :

  • la figure 1 représente une vue en coupe longitudinale et schématique d'une soupape électromagnétique à laquelle peut s'appliquer l'invention,
  • la figure 2 représente une vue en perspective illustrant schématiquement un dispositif d'actionnement de soupape selon l'invention, monté sur une culasse de moteur à combustion interne,
  • la figure 3 représente une vue en perspective représentant schématiquement une partie de l'agencement d'un dispositif d'actionnement d'une paire de soupapes selon l'invention,
  • la figure 4 représente une section verticale d'une partie du dispositif d'actionnement selon la ligne EE de la figure 3,
  • la figure 5 représente une vue en perspective éclatée d'une partie du dispositif d'actionnement des figures 3 et 4, illustrant une partie du mécanisme de commande d'une des deux soupapes,
  • la figure 6 représente une vue en coupe transversale du dispositif selon la ligne DD de la figure 3 ou selon la ligne BB de la figure 7,
  • la figure 7 représente une vue en coupe horizontale du dispositif selon la ligne AA de la figure 6,
  • la figure 8 représente une vue de côté d'une partie seulement du dispositif de la figure 3 dans une première position de fonctionnement,
  • la figure 9 représente une vue de dessus de l'agencement de la figure 8,
  • la figure 10 représente une vue analogue à celle de la figure 8, dans une seconde position de fonctionnement.
Other particularities and advantages will appear on reading the following description, made with reference to the figures in which:
  • FIG. 1 represents a longitudinal and schematic sectional view of an electromagnetic valve to which the invention can be applied,
  • FIG. 2 is a perspective view diagrammatically illustrating a valve actuating device according to the invention, mounted on an internal combustion engine cylinder head;
  • FIG. 3 represents a perspective view schematically showing a part of the arrangement of an actuating device of a pair of valves according to the invention,
  • FIG. 4 represents a vertical section of a part of the actuating device along the line EE of FIG. 3,
  • FIG. 5 represents an exploded perspective view of a portion of the actuating device of FIGS. 3 and 4, illustrating a part of the control mechanism of one of the two valves,
  • FIG. 6 represents a cross-sectional view of the device along the line DD of FIG. 3 or along line BB of FIG. 7,
  • FIG. 7 represents a horizontal sectional view of the device along the line AA of FIG. 6,
  • FIG. 8 represents a side view of only a portion of the device of FIG. 3 in a first operating position,
  • FIG. 9 represents a view from above of the arrangement of FIG. 8,
  • Figure 10 shows a view similar to that of Figure 8, in a second operating position.

L'invention s'applique aux soupapes de moteur à combustion interne actionnées de façon électromagnétique. La figure 1 illustre un exemple d'actionneur d'une telle soupape dite "soupape électromagnétique". L'actionneur comprend classiquement une partie mobile constituée d'une tige 14 dont une extrémité est solidaire d'une palette 3 disposée entre deux électro-aimants 4, 5 (cf. également figure 4). L'autre extrémité de la tige 14 mobile est en appui sur l'extrémité de la tige de la soupape 1The invention is applicable to electromagnetically operated internal combustion engine valves. Figure 1 illustrates an example of an actuator of such a valve called "electromagnetic valve". The actuator conventionally comprises a movable portion consisting of a rod 14 whose one end is secured to a pallet 3 disposed between two electromagnets 4, 5 (see also Figure 4). The other end of the movable rod 14 bears on the end of the stem of the valve 1

Deux ressorts supérieur 6 et inférieur 7 sont montés de façon antagoniste sur l'ensemble tige /soupape 14, 1 de façon à solliciter cet ensemble vers une position d'équilibre (position représentée à la figure 1). Chacun des ressorts 6, 7 comprend une extrémité fixe rendue solidaire d'une butée fixe et une extrémité mobile rendue solidaire en translation directement ou indirectement de la soupape et/ou de la tige mobile 14. La palette 3 est soumise à l'action des électro-aimants 4, 5, de façon à déplacer et bloquer la soupape 1 en position ouverte ou fermée. La palette 3 et la soupape 1 peuvent être balancées par les ressorts 6, 7 entre les deux positions ouverte et fermée. La tare des ressorts 5, 6 doit être réglée de façon que, lorsque les électro-aimants 4, 5 ne sont pas activés, la soupape 1 et la palette 3 sont disposés dans la position d'équilibre entre les positions ouverte et fermée.Two upper and lower springs 7 and 6 are counter-mounted on the rod / valve assembly 14, 1 so as to bias this assembly towards an equilibrium position (position shown in FIG. 1). Each of the springs 6, 7 comprises a fixed end made integral with a fixed abutment and a movable end made integral in translation directly or indirectly with the valve and / or the movable rod 14. The pallet 3 is subjected to the action of the electromagnets 4, 5, so as to move and lock the valve 1 in the open or closed position. The pallet 3 and the valve 1 can be balanced by the springs 6, 7 between the two open and closed positions. The tare of the springs 5, 6 must be adjusted so that when the electromagnets 4, 5 are not activated, the valve 1 and the pallet 3 are arranged in the equilibrium position between the open and closed positions.

En général, seul l'un des deux ressorts 6 associés à une soupape 1 a une tare réglable, pour permettre d'égaliser sa tare avec celle de l'autre ressort 7.In general, only one of the two springs 6 associated with a valve 1 has an adjustable tare, to allow to equalize its tare with that of the other spring 7.

Comme représenté à la figure 2, le mécanisme de commande des soupes 1 est en général intégré dans un boîtier 2 appelé "actionneur" qui est monté directement ou indirectement sur la culasse 19 d'un moteur à combustion interne.As shown in Figure 2, the soup control mechanism 1 is generally integrated in a housing 2 called "actuator" which is mounted directly or indirectly on the cylinder head 19 of an internal combustion engine.

Les figures 3 et 4 représente une partie du mécanisme de la figure 1. Par soucis de simplification, les éléments identiques à ceux décrits ci-dessus sont désignés par les mêmes références numériques et ne seront pas décrits en détail une seconde fois.Figures 3 and 4 shows a part of the mechanism of Figure 1. For the sake of simplification, the elements identical to those described above are designated by the same reference numerals and will not be described in detail a second time.

Comme illustré aux figures 4 et 5, le ressort supérieur 6 du mécanisme a une première extrémité inférieure mobile qui est rendue solidaire de la tige 14 mobile au moyen d'une coupelle 20 inférieure et un dispositif d'accrochage conique 21. L'extrémité supérieure du ressort 6 est rendue solidaire d'une rondelle d'appui 46 comprenant, par exemple, trois anneaux (cf. figure 5). La rondelle d'appui 46 est elle-même montée sur une bague 36 taraudée vissée sur le filetage extérieur d'une douille 26 cylindrique.As illustrated in FIGS. 4 and 5, the upper spring 6 of the mechanism has a first moving lower end which is secured to the movable rod 14 by means of a lower cup 20 and a conical hooking device 21. The upper end spring 6 is made integral with a bearing washer 46 comprising, for example, three rings (see Figure 5). The bearing washer 46 is itself mounted on a threaded ring 36 screwed onto the external thread of a cylindrical sleeve 26.

La douille 26 est montée libre en rotation et bloquée en translation par rapport au boîtier 2. Plus précisément, la douille 26 comporte à son extrémité supérieure une collerette en appui sur le corps de l'actionneur (électro-aimant 5 par exemple) par l'intermédiaire d'une rondelle d'appui 22. Une denture est formée sur la bordure extérieure de la collerette de la douille 26 (cf. figure 5 notamment).The sleeve 26 is mounted free to rotate and locked in translation relative to the housing 2. More specifically, the sleeve 26 has at its upper end a flange bearing against the body of the actuator (electromagnet 5 for example) by the intermediate of a bearing washer 22. A toothing is formed on the outer edge of the flange of the sleeve 26 (see Figure 5 in particular).

La bague 36 taraudée est bloquée en rotation par rapport au boîtier 2. Par exemple, comme représenté à la figure 7, la bague 36 taraudée comporte des épaulements 23 qui s'engagent dans des logements dans le corps du boîtier 2 et empêchent la rotation de la bague 36 autour de son axe.The threaded ring 36 is locked in rotation with respect to the housing 2. For example, as shown in FIG. 7, the threaded ring 36 has shoulders 23 which engage in housings in the body of the casing 2 and prevent rotation of the casing. the ring 36 around its axis.

Selon cet agencement, la rotation de douille 26 entraîne le déplacement de la bague 36 taraudée vers le long de ladite douille 26. Le sens de déplacement de la bague 36 taraudée le long de la douille 26 est déterminé par le sens de rotation de la douille 26.According to this arrangement, the bushing rotation 26 causes the tapped ring 36 to move towards said bushing 26. The direction of movement of the tapped bushing 36 along the sleeve 26 is determined by the direction of rotation of the sleeve 26.

L'ensemble constitué de la douille 26, de la bague 36 taraudée et de la rondelle d'appui 46 forme une butée 16 réglable pour l'extrémité supérieure du ressort 6 comme décrit plus en détail ci-après.The assembly consisting of the sleeve 26, the threaded ring 36 and the bearing washer 46 form a stop 16 adjustable for the upper end of the spring 6 as described in more detail below.

La denture de la douille 26 est destinée à coopérer avec un filetage complémentaire d'un organe 10 de commande de forme oblongue de préférence. A cet effet, le boîtier 2 comporte un logement 11 pour l'organe 10 situé à proximité des butées réglables 16 des deux soupapes 1 d'une même paire de soupapes.The toothing of the bushing 26 is intended to cooperate with a complementary thread of a control member 10 of oblong shape preferably. For this purpose, the housing 2 comprises a housing 11 for the member 10 located near the adjustable stops 16 of the two valves 1 of the same pair of valves.

L'organe 10 de commande comporte, par exemple, un corps en forme de tige et une roue dentée 8 formée au niveau d'une des extrémité du corps. L'organe 10 de commande est de préférence placé à demeure dans le boîtier 2. Le logement 11 du boîtier 2 est conformé pour guider l'organe de commande 10, de façon à permettant son déplacement sélectivement dans deux positions d'engrènement respectivement avec les deux butées réglables 16.The control member 10 comprises, for example, a rod-shaped body and a toothed wheel 8 formed at one end of the body. The control member 10 is preferably placed permanently in the housing 2. The housing 11 of the housing 2 is shaped to guide the control member 10, so as to enable it to be moved selectively in two meshing positions respectively with the two adjustable stops 16.

Les butées 16 et l'organe de commande 10 coopèrent en engrènement lors de leur rotation respective. De préférence, les axes de rotation respectifs de la butée 16 et l'organe de commande 10 sont sensiblement parallèles.The abutments 16 and the control member 10 cooperate in meshing during their respective rotation. Preferably, the respective axes of rotation of the abutment 16 and the control member 10 are substantially parallel.

L'organe 10 de commande est monté coulissant dans le boîtier 2 selon la direction de l'axe de symétrie longitudinal de son corps. De plus, cette direction de coulissement de l'organe 10 de commande est de préférence parallèle aux directions de déplacements des tiges 14 mobiles en appui sur les soupapes 1.The control member 10 is slidably mounted in the housing 2 in the direction of the longitudinal axis of symmetry of its body. In addition, this direction of sliding of the control member 10 is preferably parallel to the directions of movement of the mobile rods 14 resting on the valves 1.

Le logement 11 pour l'organe de commande 10 débouche sur une face du boîtier 2 de façon à permettre à l'extrémité de l'organe 10 située à l'opposée de la roue dentée 8 d'affleurer vers l'extérieur du boîtier 2. Cette extrémité affleurante de l'organe 10 de commande présente des moyens 25 d'accouplement, tels qu'une empreinte ou une forme appropriée permettant son accouplement avec un organe de réglage extérieur (non représenté). L'organe de réglage peut être, par exemple, une douille ou une clé manipulée manuellement par un opérateur ou par un robot.The housing 11 for the control member 10 opens on one side of the housing 2 so as to allow the end of the member 10 located opposite the gear 8 to flush outwardly of the housing 2 This flush end of the control member 10 has coupling means 25, such as a fingerprint or a suitable shape for coupling with an external adjusting member (not shown). The adjustment member may be, for example, a socket or a key manipulated manually by an operator or by a robot.

Avantageusement, les deux butées réglables 16 de la paire de soupapes 1 sont situées respectivement dans deux plans distincts décalés selon une direction principale de déplacement de l'organe de commande 10 (cf. figure 4).Advantageously, the two adjustable stops 16 of the pair of valves 1 are respectively located in two distinct planes offset in a main direction of movement of the control member 10 (see Figure 4).

Comme illustré à la figure, 8, les roues dentées des deux butées réglables 16 peuvent être situées dans des plans distincts faiblement décalés selon la direction de déplacement de l'organe 10 de commande. Un faible décalage des roues dentées tel que décrit précédemment permet de disposer l'organe 10 de commande dans une troisième position dite désactivée dans laquelle l'organe 10 de commande engrène en même temps avec les deux butées réglables 16 d'une paire de soupapes 1. Dans cette configuration la rotation des butées 16 et de l'organe 10 est "autobloquée".As illustrated in FIG. 8, the gears of the two adjustable stops 16 may be located in distinct planes that are slightly offset in the direction of movement of the control member. A small shift of the gears as described above makes it possible to arrange the control member 10 in a third so-called deactivated position in which the control member 10 meshes at the same time with the two adjustable stops 16 of a pair of valves 1 In this configuration the rotation of the stops 16 and the member 10 is "self-locking".

Des moyens 15, 17 de blocage de l'organe 10 de commande dans la position désactivée peuvent être prévus. Comme illustré aux figures 6 et 9 notamment, ces moyens de blocage peuvent comprendre une vis pointeau 15 montée dans un taraudage du boîtier 2 et dont l'extrémité est apte à venir s'engager dans une rainure conjuguée 17 formée sur le corps de l'organe 10 de commande.Means 15, 17 for locking the control member 10 in the deactivated position may be provided. As illustrated in FIGS. 6 and 9 in particular, these locking means may comprise a set screw 15 mounted in a tapping of the casing 2 and whose end is able to engage in a conjugate groove 17 formed on the body of the casing. control member 10.

Des moyens élastiques tels qu'un ressort 24 peuvent également être montés sur l'organe 10 de commande de façon à solliciter ce dernier vers une des positions d'engrènement. Par exemple, le ressort 24 est enfilé sur le corps de l'organe 10 de commande et a une extrémité en appui sur un circlips 27 montée sur ce même corps de l'organe 10. L'autre extrémité du ressort 24 peut venir en appui sur un épaulement formé par le logement 11 pour l'organe 10 à l'intérieur du boîtier 2.Elastic means such as a spring 24 may also be mounted on the control member 10 so as to bias the latter towards one of the meshing positions. For example, the spring 24 is threaded onto the body of the control member 10 and has one end bearing on a circlip 27 mounted on the same body of the member 10. The other end of the spring 24 can come to bear on a shoulder formed by the housing 11 for the member 10 inside the housing 2.

Le fonctionnement de l'exemple de réalisation de l'invention dont la structure a été décrite ci-dessus va à présent être expliqué.The operation of the exemplary embodiment of the invention, the structure of which has been described above, will now be explained.

Lors de son montage, l'actionneur 2 peut être disposé de sorte que l'organe 10 de commande est bloqué dans sa position désactivée. C'est-à-dire que le corps de l'organe de commande est bloqué par la vis pointeau 15 de façon que la roue dentée 8 de l'organe 10 de commande engrène avec les deux butées réglables en même temps (position représentée à la figure 8).During its assembly, the actuator 2 can be arranged so that the control member 10 is locked in its deactivated position. That is to say that the body of the control member is blocked by the set screw 15 so that the toothed wheel 8 of the control member 10 meshes with the two adjustable stops at the same time (position shown in FIG. Figure 8).

S'il est nécessaire de régler la tare d'un premier ressort, par exemple, le ressort 6 situé à droite sur la figure 10 (à gauche sur la figure 4), un opérateur peut dévisser la vis pointeau 15 pour libérer l'organe de commande 10. Lorsque la vis pointeau 15 ne forme plus un blocage pour l'organe 10 de commande, ce dernier est déplacé automatiquement vers le haut dans son logement 11 sous l'action du ressort 24 monté sur son corps. Avantageusement, le dispositif peut être dimensionné de façon que le ressort 24 place l'organe 10 dans une position d'équilibre haute dans laquelle la roue dentée 8 engrène uniquement avec la denture de la douille 26 de la butée réglable 16 du premier ressort 6 (position représentée à la figure 10).If it is necessary to adjust the tare of a first spring, for example, the spring 6 located on the right in Figure 10 (left in Figure 4), an operator can unscrew the needle screw 15 to release the organ 10. When the needle screw 15 no longer forms a lock for the control member 10, the latter is automatically moved upwards in its housing 11 under the action of the spring 24 mounted on its body. Advantageously, the device can be dimensioned so that the spring 24 places the member 10 in a high equilibrium position in which the toothed wheel 8 meshes only with the toothing of the bushing 26 of the adjustable stop 16 of the first spring 6 ( position shown in Figure 10).

L'organe 10 de commande peut ensuite être pivoté à l'aide d'un organe de réglage comme décrit précédemment, de façon à régler la tare du ressort 6 concerné.The control member 10 can then be pivoted by means of a control member as described above, so as to adjust the tare of the spring 6 concerned.

Si l'autre ressort 6 adjacent (à droite sur la figure 4 et à gauche sur la figure 10) doit également être réglé, l'organe de réglage peut être accouplé à l'organe 10 de commande en exerçant sur ce dernier une pression vers l'intérieur du boîtier 2. L'organe 10 de commande est ainsi translaté vers le bas dans le boîtier 2 jusqu'à une une position basse dans laquelle la roue dentée 8 engrène cette fois uniquement avec le filetage de la douille 26 de la butée réglable 16 du second ressort (position non représentée aux figures par soucis de concision) A cet effet, le boîtier 2 peut former une butée pour l'organe 10 de commande limitant son déplacement vers l'intérieur du boîtier 2, au niveau de cette position basse.If the other adjacent spring 6 (on the right in FIG. 4 and on the left in FIG. 10) must also be adjusted, the adjusting member can be coupled to the control member by exerting on the latter a pressure towards 2. The control member 10 is thus translated downwards in the housing 2 to a low position in which the toothed wheel 8 meshes this time only with the thread of the bushing 26 of the stop adjustable 16 of the second spring (position not shown in the figures for the sake of concision) For this purpose, the housing 2 can form a stop for the control member 10 limiting its movement towards the inside of the housing 2, at this low position.

Lorsque la tare des deux ressorts 6 est réglée, la vis pointeau 15 de blocage peut à nouveau être serrée pour garantir un réglage stable des ressorts 6. Le système peut être dimensionné de façon que, à partir de la position d'équilibre haute, le serrage de la vis pointeau entraîne la translation automatique de l'organe 10 de commande vers la position désactivée. Par exemple, la vis 15 de blocage peut coopérer avec des plans inclinés formé par la rainure 17 du corps de l'organe de commande 10When the tare weight of the two springs 6 is adjusted, the set needle screw 15 can again be tightened to ensure a stable adjustment of the springs 6. The system can be dimensioned so that, from the high equilibrium position, the tightening the needle screw causes the automatic translation of the control member 10 to the deactivated position. For example, the locking screw 15 can cooperate with inclined planes formed by the groove 17 of the body of the control member 10

Ainsi, tout en étant de structure simple et peu coûteuse, le dispositif de commande selon l'invention permet, dans un volume réduit de garantir un réglable simple et fiables des ressorts de soupapes. L'invention n'est bien entendu pas limitée à l'exemple de réalisation décrit ci-dessus.Thus, while being simple and inexpensive structure, the control device according to the invention allows, in a reduced volume to guarantee a simple and reliable adjustable valve springs. The invention is of course not limited to the embodiment described above.

Claims (15)

  1. Device for actuating at least one pair of valves (1) of an internal combustion engine positioned inside a casing (2) of the type comprising, for each valve (1), magnetizing means (4, 5), at least one spring (6) urging the valve (1) into a position of equilibrium and comprising a fixed end secured to an adjustable stop (16) and a moving end translationally secured to the valve (1), the adjustable stop (16) comprising meshing means (26) able to collaborate with mating meshing means (8) belonging to a control member (10) so as to allow the stop (16) to be moved with respect to the casing (2) so as to adjust the preload on the spring (6), characterized in that the control member (10) is permanently sited inside the casing (2) adjacent to the adjustable stops (16) of the two valves (1) of the same pair, the casing (2) comprising means for guiding and positioning the control member (10) selectively in two positions in which it meshes with the respective one of the two adjustable stops (16).
  2. Device according to Claim 1, characterized in that the two adjustable stops (16) of a pair of valves (1) are situated in distinct planes offset in a main direction of travel of the control member (10).
  3. Device according to Claim 1 or 2, characterized in that it comprises means (15, 17) for immobilizing the control member (10) in a deactivated position preventing an adjustable stop (16) from being moved.
  4. Device according to Claim 3, characterized in that the deactivated position corresponds to the control member (10) being in mesh with both adjustable stops (16) of one pair of valves (1) simultaneously.
  5. Device according to Claim 3 or 4, characterized in that the means of immobilizing the member (10) comprise a spindle (15) able to move in the casing (2) and able to collaborate with the body (17) of the control member (10).
  6. Device according to any one of the preceding claims, characterized in that the control member (10) is mounted such that it can slide in the casing (2).
  7. Device according to Claim 6, characterized in that the direction of sliding of the control member (10) is substantially parallel to the directions of travel of the valves (1).
  8. Device according to any one of the preceding claims, characterized in that the end stop (16) and the control member (10) collaborate in meshing as they are respectively turned, and in that when the control member (10) is in a meshed position, the respective axes of rotation of the end stop (16) and the control member (10) are substantially parallel.
  9. Device according to any one of the preceding claims, characterized in that the end stop (16) comprises a tapped ring (36) mounted on the external screw thread of a sleeve (26) provided with meshing means, the sleeve (26) being mounted free to rotate and prevented from translational movement with respect to the casing (2), and in that the tapped ring (36) is prevented from rotating with respect to the casing (2) so that rotation of the sleeve (26) causes the tapped ring (36) to move along the said sleeve (26).
  10. Device according to Claim 9, characterized in that the sleeve (26) has the overall shape of a cylindrical tube one end of which is flanged, and in that the meshing means are formed on the flange.
  11. Device according to any one of the preceding claims, characterized in that the guiding and positioning means comprise elastic means (24) urging the control member (10) towards one of the meshing positions.
  12. Device according to any one of the preceding claims, characterized in that the control member (10) comprises a body in the form of a rod and a toothed wheel (8) formed at one of the ends of the body.
  13. Device according to any one of the preceding claims, characterized in that the control member (10) has one end substantially flush with one face of the casing (2) and comprises means (14) of coupling with an adjusting member.
  14. Device according to any one of the preceding claims, characterized in that it comprises, for each valve (1), a paddle (3) secured in terms of translation to the stem of the valve (1), the paddle (3) being positioned between two magnetizing means (4, 5) and two antagonistic springs (6, 7) urging the valve/paddle assembly (1, 3) towards a position of equilibrium.
  15. Internal combustion engine equipped with at least one pair of valves, characterized in that it comprises an actuating device according to any one of the preceding claims.
EP05762748A 2004-05-19 2005-05-19 Valve actuating device Not-in-force EP1751403B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0450999A FR2870563B1 (en) 2004-05-19 2004-05-19 VALVE ACTUATING DEVICE
PCT/FR2005/050345 WO2005112543A1 (en) 2004-05-19 2005-05-19 Valve actuating device

Publications (2)

Publication Number Publication Date
EP1751403A1 EP1751403A1 (en) 2007-02-14
EP1751403B1 true EP1751403B1 (en) 2007-11-07

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EP05762748A Not-in-force EP1751403B1 (en) 2004-05-19 2005-05-19 Valve actuating device

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US (1) US7540265B2 (en)
EP (1) EP1751403B1 (en)
JP (1) JP4879171B2 (en)
AT (1) ATE377697T1 (en)
DE (1) DE602005003222T2 (en)
ES (1) ES2296208T3 (en)
FR (1) FR2870563B1 (en)
WO (1) WO2005112543A1 (en)

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US9090315B1 (en) 2010-11-23 2015-07-28 Piedra—Sombra Corporation, Inc. Optical energy transfer and conversion system
US9873495B2 (en) 2014-12-19 2018-01-23 Stone Aerospace, Inc. System and method for automated rendezvous, docking and capture of autonomous underwater vehicles
US10081446B2 (en) 2015-03-11 2018-09-25 William C. Stone System for emergency crew return and down-mass from orbit
US10598404B2 (en) 2016-06-29 2020-03-24 Research Products Corporation Damper with adjustable resistance to blade motion
US11493233B2 (en) 2016-09-26 2022-11-08 Stone Aerospace, Inc. Direct high voltage water heater

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Publication number Priority date Publication date Assignee Title
FR2714998B1 (en) * 1994-01-07 1996-02-09 Peugeot Method for controlling a bistable electromagnetic actuator and device for its implementation.
DE19506566A1 (en) * 1995-02-24 1996-08-29 Bayerische Motoren Werke Ag Electromagnetic piston valve actuation device for internal combustion engine
DE19631909A1 (en) 1995-08-08 1997-02-13 Fev Motorentech Gmbh & Co Kg Adjustment of null position of piston engine valve actuator armature - has adjustment of armature element position while measuring and comparing inductance values of electromagnets
FR2792031B1 (en) * 1999-04-09 2001-06-08 Sagem ELECTROMAGNETIC VALVE CONTROL DEVICE
FR2792679B1 (en) * 1999-04-23 2001-07-27 Sagem ADJUSTABLE VALVE CONTROL DEVICE AND METHOD FOR ADJUSTING SUCH A DEVICE
DE10218737A1 (en) * 2002-04-26 2003-12-11 Bayerische Motoren Werke Ag Device for adjusting a stroke actuator for a gas exchange valve arranged in a cylinder head of an internal combustion engine
US6997146B2 (en) * 2002-05-22 2006-02-14 Toyota Jidosha Kabushiki Kaisha Start control method and apparatus for solenoid-operated valves of internal combustion engine

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Publication number Publication date
ES2296208T3 (en) 2008-04-16
US20080163834A1 (en) 2008-07-10
FR2870563B1 (en) 2006-06-30
FR2870563A1 (en) 2005-11-25
EP1751403A1 (en) 2007-02-14
US7540265B2 (en) 2009-06-02
DE602005003222T2 (en) 2008-08-28
WO2005112543A1 (en) 2005-12-01
JP2007538195A (en) 2007-12-27
ATE377697T1 (en) 2007-11-15
JP4879171B2 (en) 2012-02-22
DE602005003222D1 (en) 2007-12-20

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