FR2504188A1 - HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES - Google Patents

HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES Download PDF

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Publication number
FR2504188A1
FR2504188A1 FR8206495A FR8206495A FR2504188A1 FR 2504188 A1 FR2504188 A1 FR 2504188A1 FR 8206495 A FR8206495 A FR 8206495A FR 8206495 A FR8206495 A FR 8206495A FR 2504188 A1 FR2504188 A1 FR 2504188A1
Authority
FR
France
Prior art keywords
valve
stroke
piston
lever
transmission lever
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.)
Withdrawn
Application number
FR8206495A
Other languages
French (fr)
Inventor
Hans-Jurgen Zurner
Wolfgang Fuhrmann
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.)
MAN AG
Original Assignee
MAN Maschinenfabrik Augsburg Nuernberg AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MAN Maschinenfabrik Augsburg Nuernberg AG filed Critical MAN Maschinenfabrik Augsburg Nuernberg AG
Publication of FR2504188A1 publication Critical patent/FR2504188A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • F01L9/11Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/3442Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
    • F01L2001/34423Details relating to the hydraulic feeding circuit
    • F01L2001/34446Fluid accumulators for the feeding circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Compressor (AREA)
  • Control Of Transmission Device (AREA)

Abstract

UN LEVIER DE TRANSMISSION 13 ASSOCIE A UN VERIN DE COMMANDE 17 EST DISPOSE PERPENDICULAIREMENT A LA COURSE DE LA SOUPAPE 12 AVEC UNE POSSIBILITE DE COULISSEMENT LIMITE DE L'UN PAR RAPPORT A L'AUTRE, DE SORTE QUE L'ON PEUT MODIFIER FACILEMENT ET A VOLONTE LE BRAS DE LEVIER DE MANOEUVRE DE LA SOUPAPE 12 ET, PAR CONSEQUENT, LA COURSE DE CELLE-CI.A TRANSMISSION LEVER 13 ASSOCIATED WITH A CONTROL CYLINDER 17 IS ARRANGED PERPENDICULARLY TO THE STROKE OF THE VALVE 12 WITH A LIMITED SLIDING POSSIBILITY OF ONE IN RELATION TO THE OTHER, SO THAT WE CAN CHANGE EASILY AND AT WILL OPERATE THE LEVER ARM OF THE VALVE 12 AND, THEREFORE, THE STROKE OF THE SAME.

Description

L'invention a pour objet un dispositif hydraulique pour la manoeuvre desThe subject of the invention is a hydraulic device for the operation of

soupapes de circulation de gaz dans les moteurs à combustion interne, les motocompresseurs et les machines similaires, o un piston de manoeuvre associé à chaque soupape dont la course est réglable, peut coulisser, par l'intermédiaire d'une conduite de commande remplie d'un liquide de commande, grace à un piston transmetteur actionné par une came contre la force d'un ressort de fermeture, et o des  gas circulation valves in internal combustion engines, motor compressors and similar machines, o an operating piston associated with each valve whose stroke is adjustable, can slide, via a control line filled with a control liquid, thanks to a transmitting piston actuated by a cam against the force of a closing spring, and o

moyens sont prévus au point le plus élevé du circuit hydrau-  means are provided at the highest point of the water circuit

lique pour permettre un dégazage permanent du liquide de commande, le cylindre transmetteur étant aussi en liaison  to allow permanent degassing of the control liquid, the transmitting cylinder also being connected

avec un moyen de remplissage en liquide de commande.  with means for filling with control liquid.

Un tel dispositif est déjà connu par la demande de brevet allemand publiée N O 28 40 445 Dans celle-ci on se préoccupe avant tout du dégazage permanent du liquide de commande, qui se fait à chaque fois au point le plus élevé de la conduite qui véhicule ce liquide De plus, la came qui actionne le piston transmetteur comprend une came antérieure et une came postérieure pour commander en conséquence la montée en pression dans le circuit hydraulique et notamment pour ajuster la transmission de la pression en fonction du  Such a device is already known from the published German patent application NO 28 40 445 In this one one is concerned above all with the permanent degassing of the control liquid, which is done each time at the highest point of the pipe which conveys this liquid In addition, the cam which actuates the transmitting piston includes an anterior cam and a posterior cam to consequently control the rise in pressure in the hydraulic circuit and in particular to adjust the transmission of the pressure according to the

mouvement souhaité de la soupape.desired valve movement.

Le vérin de manoeuvre est placé directement au-  The actuating cylinder is placed directly above

dessus de la soupape et il agit directement sur elle.  above the valve and it acts directly on it.

Selon ce dispositif connu, la course d'ouverture de  According to this known device, the opening stroke of

la soupape peut être modifiée à l'aide d'un étranglement dis-  the valve can be modified using a throttle

posé sur le circuit hydraulique gr Ace auquel la pression à transmettre à la soupape, et par conséquent le déplacement  placed on the hydraulic circuit gr Ace at which the pressure to be transmitted to the valve, and consequently the displacement

de cette soupape, peuvent être plus ou moins limités.  of this valve, can be more or less limited.

La réduction de la course de soupape peut, on le sait, influer favorablement sur le comportement au démarrage et en charge partielle d'un moteur Le moyen de réglage connu utilisant un étranglement ne permet cependant, par nature, qu'une adaptation plus ou moins inerte de la course de soupape à chaque situation, ce que l'on peut considérer comme un certain inconvénient Il faut ajouter, en outre, que dans ce dispositif la soupape est mae directement à partir du haut par le cylindre de manoeuvre Il est donc inévitable que de l'huile de fuite qui s'échappe de ce dernier, coule le long de la tige de soupape, entre en contact avec les parties chaudes du moteur, se cokéfie ou brûle à l'intérieur du cylindre. Le but principal de l'invention est d'éliminer les  Reducing the valve stroke can, as we know, have a favorable influence on the starting and partial load behavior of an engine. The known adjustment means using a throttle, however, by its nature only allows more or less adaptation. inert of the valve stroke in each situation, which can be considered as a certain drawback It should be added, moreover, that in this device the valve is driven directly from the top by the actuating cylinder It is therefore inevitable leaking oil that escapes from the latter, flows along the valve stem, comes into contact with the hot parts of the engine, becomes coked or burns inside the cylinder. The main object of the invention is to eliminate the

inconvénients mentionnés ci-dessus et d'améliorer le disposi-  disadvantages mentioned above and improve the disposi-

tif hydraulique connu de telle manière qu'aucune quantité du liquide de commande ne parvienne plus aux parties chaudes du moteur et qu'un réglage précis et continu de la course  hydraulic device known in such a way that no quantity of control fluid reaches the hot parts of the engine and only a precise and continuous adjustment of the stroke

de soupape soit possible avec une efficacité immédiate.  valve is possible with immediate efficiency.

Selon l'invention ce but est atteint quand on prévoit entre le piston de manoeuvre et la soupape un levier de transmission, pouvant pivoter autour d'un pivot, cependant que ce levier ou le vérin de manoeuvre de la soupape sont disposés pour permettre la modification de la course de pivotement de façon perpendiculaire à la course de la soupape gr Ao à une possibilité de coulissement limité de l'un par  According to the invention this object is achieved when there is provided between the operating piston and the valve a transmission lever, which can pivot around a pivot, while this lever or the actuating cylinder of the valve are arranged to allow modification. of the pivoting stroke perpendicular to the stroke of the valve gr Ao to a limited sliding possibility of one by

rapport à l'autre.compared to each other.

Avec ce mode de réalisation on introduit donc à nouveau un levier de transmission tel qu'une tige mécanique,  With this embodiment, therefore, a transmission lever such as a mechanical rod is again introduced,

connu généralement pour ce besoin, tout en prévoyant de préfé-  generally known for this need, while planning to prefer-

rence un levier à un bras plus avantageux dans différentes possibilités de réalisation Le vérin de manoeuvre attaque le levier par en haut, de sorte qu'aucun liquide de commande  Using a lever with a more advantageous arm in different possible embodiments The actuating cylinder attacks the lever from above, so that no control liquid

ne peut plus couler en suivant la tige de la soupape.  can no longer flow following the valve stem.

Pour pouvoir règler la course de la soupape à des valeurs différentes, on peut déplacer le pivot du levier de transmission ou bien le vérin de manoeuvre, en direction horizontale c'est-à-dire perpendiculairement au mouvement de la course de la soupape, l'un par rapport à l'autre, de façon que pour une même course du vérin de manoeuvre de la soupape on obtienne, du fait du changement du bras de levier, une  To be able to adjust the valve stroke to different values, you can move the pivot of the transmission lever or the actuating cylinder in a horizontal direction, that is to say perpendicular to the movement of the valve stroke, l '' in relation to each other, so that for the same stroke of the actuator of the valve there is obtained, due to the change of the lever arm, a

course différente de la soupape.different valve stroke.

Dans une variante de réalisation de l'invention on peut laisser s'appuyer sur la soupape l'extrémité libre du levier de transmission, afin qu'il puisse coulisser sur elle dans des limites définies Le déplacement luimême peut, w- de préférence, être obtenu par une liaison du pivot du levier de transmission avec la tige d'un vérin hydraulique qui peut agir contre la force d'un ressort sous l'effet d'un liquide hydraulique Il est préférable d'utiliser un tel agencement pour pouvoir réaliser de manière simple, en  In an alternative embodiment of the invention, the free end of the transmission lever can be supported on the valve, so that it can slide on it within defined limits. The movement itself can, w- preferably, be obtained by connecting the pivot of the transmission lever with the rod of a hydraulic cylinder which can act against the force of a spring under the effect of a hydraulic fluid. It is preferable to use such an arrangement in order to be able to carry out simple way, in

particulier selon un cycle approprié quelconque, un dépla-  particular according to any suitable cycle, a shift

cement du pivot au moyen du déplacement du piston de ce vérin On peut naturellement réaliser aussi le déplacement  cement of the pivot by means of the displacement of the piston of this jack It is naturally also possible to carry out the displacement

du pivot par d'autres moyens L'invention s'adapte facile-  the pivot by other means The invention adapts easily-

ment,à chaque fois, aux conditions existantes.  each time, under the existing conditions.

On donnera maintenant, sans intention limitative,  We will now give, without limiting intention,

une description d'un exemple de réalisation représenté sur  a description of an exemplary embodiment shown on

la figure unique annexée qui montre schématiquement une  the attached single figure which schematically shows a

disposition préférée avec un levier à un bras, le déplace-  preferred arrangement with a lever with one arm, moves it

ment possible du vérin de manoeuvre étant également esquissé  possible maneuver cylinder also being sketched

en trait mixte.in dashed line.

Une came 1 commande par l'intermédiaire d'un piston transmetteur 2 guidé dans un cylindre transmetteur 3, et d'une conduite de commande 4 à dégazage permanent 5, un piston de manoeuvre 6 grâce à un liquide de commande, ce piston étant disposé et guidé dans un cylindre de manoeuvre  A cam 1 controls by means of a transmitting piston 2 guided in a transmitting cylinder 3, and of a control pipe 4 with permanent degassing 5, an operating piston 6 thanks to a control liquid, this piston being arranged and guided in an operating cylinder

7 Le piston de manoeuvre 6 agit sur un levier de trans-  7 The operating piston 6 acts on a transfer lever

mission 13 monté autour d'un pivot 14 par une extrémité et  mission 13 mounted around a pivot 14 by one end and

reposant par son extrémité libre opposée sur une soupape 12.  resting on its opposite free end on a valve 12.

Le point d'attaque de ce levier 13 par le piston de manoeu-  The point of attack of this lever 13 by the operating piston

vre 6 se situe entre le pivot 14 et l'appui dudit levier 13 sur la soupape 12 Le piston 6 pousse le levier 13 dans le  vre 6 is located between the pivot 14 and the support of said lever 13 on the valve 12 The piston 6 pushes the lever 13 into the

sens de l'ouverture de la soupape 12.  direction of valve opening 12.

Le pivot 14 est situé sur une tige de piston 15 qui prolonge un piston 16 monté coulissant dans un cylindre hydraulique 17 Quand le piston 16 est repoussé par un liquide de commande venant par une conduite 19, la tige de  The pivot 14 is located on a piston rod 15 which extends a piston 16 slidably mounted in a hydraulic cylinder 17 When the piston 16 is pushed back by a control liquid coming through a line 19, the rod

soupape 15 décolle d'une butée 18 et le levier de transmis-  valve 15 takes off from a stop 18 and the transmission lever

sion 13 est déplacé horizontalement,ce qui a pour conséquence une modification du bras de levier entre la soupape 12 et le point d'attaque du piston de manoeuvre 6; il en résulte 1- une modification de la course de la soupape 12 Le même effet se produirait aussi, naturellement, si à la place du pivot 14 on déplaçait le cylindre de manoeuvre 7 dans  sion 13 is moved horizontally, which results in a modification of the lever arm between the valve 12 and the point of attack of the operating piston 6; this results in 1- a modification of the stroke of the valve 12 The same effect would also occur, naturally, if instead of the pivot 14 the operating cylinder 7 was moved in

le sens indiqué par une flèche 20.  the direction indicated by an arrow 20.

Il faut encore signaler pour conclure, que l'on a prévu une soupape de retenue 8, une soupape de décharge et un réservoir 11, dont les fonctions sont considérées  To conclude, it must also be pointed out that a check valve 8, a relief valve and a tank 11 have been provided, the functions of which are considered.

comme étant généralement connues.  as being generally known.

?'30 D 4188? '30 D 4188

Claims (1)

REVENDICATIONS 1 Dispositif hydraulique pour la manoeuvre des soupapes de circulation de gaz dans les moteurs à combustion interne, les motocompresseurs et les machines similaires, o un piston de manoeuvre associé à chaque soupape dont la course est réglable, peut coulisser, par l'intermédiaire d'une conduite de commande remplie d'un liquide de commande, grâce à un piston transmetteur actionné par une came contre la force d'un ressort de fermeture, et o des moyens sont prévus au point le plus élevé du circuit hydraulique pour permettre un dégazage permanent du liquide de commande, le cylindre transmetteur étant en liaison avec un moyen de remplissage en liquide de commande, caractérisé en ce qu'un levier de transmission ( 13) est monté pivotant autour d'un pivot ( 14), entre le piston d'actionnement ( 6) et la soupape ( 12), et ce levier de transmission ( 13) ou le cylin- dre de manoeuvre ( 7) sont disposés pour permettre le chan- gement de la course du levier de transmission ( 13), de façon perpendiculaire à la course de la soupape avec une possibilité de coulissement limité de l'un par rapport à l'autre. 2 Dispositif hydraulique selon la revendication 1, caractérisé en ce que le levier de transmission ( 13) est un levier à un bras dont l'extrémité libre repose sur la soupape ( 12) tandis que le piston de manoeuvre ( 6) est disposé entre la soupape ( 12) et le pivot ( 14) et attaque le levier ( 13) dans le sens de la course d'ouverture de la soupape. 3 Dispositif hydraulique selon les revendicationsCLAIMS 1 Hydraulic device for the operation of gas circulation valves in internal combustion engines, motocompressors and similar machines, o an operating piston associated with each valve whose stroke is adjustable, can slide, by means of '' a control line filled with a control liquid, thanks to a transmitting piston actuated by a cam against the force of a closing spring, and o means are provided at the highest point of the hydraulic circuit to allow degassing permanent control liquid, the transmitting cylinder being connected to a means for filling the control liquid, characterized in that a transmission lever (13) is pivotally mounted around a pivot (14), between the piston d actuation (6) and the valve (12), and this transmission lever (13) or the operating cylinder (7) are arranged to allow the stroke of the transmission lever (13) to be changed, from perpendicular to the valve stroke with a possibility of limited sliding of one relative to the other. 2 Hydraulic device according to claim 1, characterized in that the transmission lever (13) is a lever with one arm whose free end rests on the valve (12) while the operating piston (6) is disposed between the valve (12) and the pivot (14) and attacks the lever (13) in the direction of the valve opening stroke. 3 Hydraulic device according to claims 1 et 2, caractérisé en ce que le levier de transmission ( 13) est articulé sur la tige ( 15) d'un piston hydraulique ( 16) qui est monté pour pouvoir coulisser, sous l'effet du liquide hydraulique et contre la force d'un ressort,  1 and 2, characterized in that the transmission lever (13) is articulated on the rod (15) of a hydraulic piston (16) which is mounted so that it can slide, under the effect of the hydraulic fluid and against the force d 'a spring, perpendiculairement à la course de la soupape ( 12).  perpendicular to the stroke of the valve (12). e 8-7 'It) Ate 8-7 'It) At
FR8206495A 1981-04-16 1982-04-15 HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES Withdrawn FR2504188A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813115422 DE3115422A1 (en) 1981-04-16 1981-04-16 HYDRAULIC DEVICE FOR ACTUATING GAS EXCHANGE VALVES

Publications (1)

Publication Number Publication Date
FR2504188A1 true FR2504188A1 (en) 1982-10-22

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FR8206495A Withdrawn FR2504188A1 (en) 1981-04-16 1982-04-15 HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES

Country Status (7)

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JP (1) JPS57181910A (en)
DD (1) DD207398A1 (en)
DE (1) DE3115422A1 (en)
FR (1) FR2504188A1 (en)
GB (1) GB2097084A (en)
IT (1) IT8220026A0 (en)
SE (1) SE8202383L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0345252B1 (en) * 1986-09-09 1992-03-25 WRIDE, Marlene Alfreda Variable lift cam follower
US4887562A (en) * 1988-09-28 1989-12-19 Siemens-Bendix Automotive Electronics L.P. Modular, self-contained hydraulic valve timing systems for internal combustion engines
DE3920931A1 (en) * 1989-06-27 1991-01-03 Fev Motorentech Gmbh & Co Kg ELECTROMAGNETIC OPERATING DEVICE
DE102013113815A1 (en) * 2013-12-11 2015-06-11 Pierburg Gmbh Transmission arrangement for a mechanically controllable valve train

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB213894A (en) * 1923-04-05 1924-09-18 Henry Farman Improvements relating to the regulation of internal-combustion engines for aircraft
FR2287583A1 (en) * 1974-10-10 1976-05-07 Maschf Augsburg Nuernberg Ag Adjustable hydraulic valve control - for inlet and outlet valves of reciprocating IC engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE369394C (en) * 1921-06-07 1923-02-19 Maybach Motorenbau G M B H Control of valves, in particular injection valves for constant pressure motors
DE2363891A1 (en) * 1973-07-13 1975-06-26 Daimler Benz Ag Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface
DE2337885A1 (en) * 1973-07-26 1975-02-06 Daimler Benz Ag Adjusting device for I.C. engine valves - using stop, regulated by pressure medium piston, to adjust valve lift
DE2840445C2 (en) * 1978-09-16 1984-10-04 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg Hydraulic device for operating a gas exchange valve for internal combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB213894A (en) * 1923-04-05 1924-09-18 Henry Farman Improvements relating to the regulation of internal-combustion engines for aircraft
FR2287583A1 (en) * 1974-10-10 1976-05-07 Maschf Augsburg Nuernberg Ag Adjustable hydraulic valve control - for inlet and outlet valves of reciprocating IC engine

Also Published As

Publication number Publication date
SE8202383L (en) 1982-10-17
GB2097084A (en) 1982-10-27
DE3115422A1 (en) 1982-11-11
DE3115422C2 (en) 1989-12-14
IT8220026A0 (en) 1982-03-09
DD207398A1 (en) 1984-02-29
JPS57181910A (en) 1982-11-09

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