FR2504188A1 - HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES - Google Patents
HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES Download PDFInfo
- 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- Withdrawn
Links
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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
- F01L9/11—Valve-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
-
- 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
- F01L1/34—Valve-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
- F01L1/344—Valve-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
- F01L1/3442—Valve-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
- F01L2001/34423—Details relating to the hydraulic feeding circuit
- F01L2001/34446—Fluid 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)
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 |
Family
ID=6130291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8206495A Withdrawn FR2504188A1 (en) | 1981-04-16 | 1982-04-15 | HYDRAULIC DEVICE FOR THE OPERATION OF GAS CIRCULATION VALVES |
Country Status (7)
Country | Link |
---|---|
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)
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)
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)
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 |
-
1981
- 1981-04-16 DE DE19813115422 patent/DE3115422A1/en active Granted
-
1982
- 1982-03-09 IT IT8220026A patent/IT8220026A0/en unknown
- 1982-04-12 JP JP57059828A patent/JPS57181910A/en active Pending
- 1982-04-14 DD DD82238984A patent/DD207398A1/en unknown
- 1982-04-15 SE SE8202383A patent/SE8202383L/en not_active Application Discontinuation
- 1982-04-15 FR FR8206495A patent/FR2504188A1/en not_active Withdrawn
- 1982-04-16 GB GB8211151A patent/GB2097084A/en not_active Withdrawn
Patent Citations (2)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |