FR2709149A1 - Device for controlling the lift and variable opening of a valve - Google Patents

Device for controlling the lift and variable opening of a valve Download PDF

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Publication number
FR2709149A1
FR2709149A1 FR9212803A FR9212803A FR2709149A1 FR 2709149 A1 FR2709149 A1 FR 2709149A1 FR 9212803 A FR9212803 A FR 9212803A FR 9212803 A FR9212803 A FR 9212803A FR 2709149 A1 FR2709149 A1 FR 2709149A1
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FR
France
Prior art keywords
valve
cam
rocker
piston
rocker arm
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.)
Pending
Application number
FR9212803A
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French (fr)
Inventor
Picchi Jean-Pierre
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9212803A priority Critical patent/FR2709149A1/en
Priority to FR9213805A priority patent/FR2709150B1/en
Publication of FR2709149A1 publication Critical patent/FR2709149A1/en
Pending legal-status Critical Current

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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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

According to the invention, the same valve (1) can be actuated from cams (2, 3, 4) with different profiles borne by one and the same camshaft (5). For this purpose, a rocker assembly (6) equipped with telescopic rocker levers (7) is interposed between each cam and the valve. A distributor slide valve (8) sliding along the axis of the rocker (10) manages the action of one of the cams using oil pressure, as a function of engine parameters. Such a device applies to the manufacture of internal combustion engines of any type.

Description

Dispositif de commande de levée et temps d'ouverture variable d'une soupape.Device for controlling lift and variable opening time of a valve.

La présente invention concerne les moteurs à combustion interne et en particulier un moteur à combustion interne à quatre temps adapté pour fonctionner aussi bien dans les bas régimes que dans les hauts régimes.The present invention relates to internal combustion engines and in particular a four-stroke internal combustion engine adapted to operate both in low speeds and in high speeds.

Diverses solutions ont été recherchées afin d'améliorer la souplesse des moteurs aux bas et hauts régimes ainsi que leurs performances. Various solutions have been sought in order to improve the flexibility of the engines at low and high revs as well as their performance.

II existe des solutions à ces problèmes chez certains constructeurs: -Dispositifs:2653164. 2567569. 2644543. 2663682. 2644543 - Variation de la levée des soupapes." RElr HONDA"( marque déposée) - Variation de la levée et du diagramme." VTEC HONDA"(marque déposée) - Variation du croisement entre cames. RFVC HONDk"(macque déposée)
L'état de la technique favorisant l'emploi d'arbres à cames en tête ainsi que l'emploi de culbuteurs intermédiaires optimisant les levées, le dispositif proposé peut être appliqué à des culbuteurs à axe central ou à axe déporté. La description se ferra sur ce dernier modéle.There are solutions to these problems with certain manufacturers: -Devices: 2653164. 2567569. 2644543. 2663682. 2644543 - Variation of valve lift. "RElr HONDA" (registered trademark) - Variation of lift and diagram. "VTEC HONDA" (registered trademark) - Variation of cross between cams. RFVC HONDk "(registered mask)
The state of the art favoring the use of overhead camshafts as well as the use of intermediate rockers optimizing the lifts, the proposed device can be applied to rockers with central axis or with offset axis. The description will be made on this last model.

Culbuteur (6): posséde un linguet fixe (7") ainsi que deux alésages (11,11') incorporant deux pistons (7, 7') mobiles pouvant coulisser dans leurs logements
Deux conduits d'arrivée (12) et vidange d'huile (13), partant de I'axe de pivot du culbuteur (6) et rejoignant le fond des alésages, sont réalisés. Dans le conduit d'arrivée d'huile un clapet à bille ( I 4) est interposé.Rocker arm (6): has a fixed latch (7 ") as well as two bores (11,11 ') incorporating two movable pistons (7, 7') which can slide in their housings
Two inlet pipes (12) and oil drain (13), starting from the pivot axis of the rocker arm (6) and joining the bottom of the bores, are produced. In the oil inlet pipe a ball valve (I 4) is interposed.

Pistons (7, 7'): les deux pistons utilisés sont identiques et possédent un profil en linguet sur le dessus en contact avec la came. Une gorge verticale (ils) est usinée afin de recevoir un organe empéchant sa rotation, par exemple un ressort et une bille (16). Le linguet (7") est fixe.Pistons (7, 7 '): the two pistons used are identical and have a latch profile on the top in contact with the cam. A vertical groove (they) is machined in order to receive a member preventing its rotation, for example a spring and a ball (16). The latch (7 ") is fixed.

Cames (2, 3, 4): elles sont usinées afin que la variation aille progressivement d'une petite levée à une grande ainsi que de courts temps d'ouverture à des temps plus importants, c'est à dire que leurs points d'attaque et de relache augmentent de façon progréssive. Exemple : levée Smm, puis 8mm, puis i lmm. Cams (2, 3, 4): they are machined so that the variation goes progressively from a small lift to a large one as well as short opening times to more important times, i.e. their points of attack and release gradually increase. Example: Smm survey, then 8mm, then i lmm.

Axe de culbuteur (10): Evidé, il peut recevoir un organe coulissant (tiroir8), à linterieur possède des trous d'arrivée (20) et de vidange (21) d'huile sous pression. Ces trous correspondent aux conduits (12, 19) pratiqués dans le culbuteur (en phase de repos sur le dos de la came).Rocker shaft (10): Hollowed out, it can receive a sliding member (drawer8), inside has inlet holes (20) and drain (21) of pressurized oil. These holes correspond to the conduits (12, 19) made in the rocker arm (in the rest phase on the back of the cam).

Tiroir distributeur (8): permet d'alimenter en huile sous pression (9) le piston selectionné tout en libérant les autres linguets.Distributor drawer (8): supplies pressurized oil (9) to the selected piston while releasing the other latches.

Figure 3:
En position A du tiroir: la came (2) est en prise avec le linguet (7"), les linguets (7) et (7') peuvent se vidanger de l'huile qu'ils contiennent et libérer les cames (3 ) et (4.) Le ressort de rappel (17) permet d'eviter les bruits de distribution en gardant le contact entre le linguet et la came.Figure 3:
In position A of the drawer: the cam (2) is in engagement with the pawl (7 "), the pawls (7) and (7 ') can drain of the oil which they contain and release the cams (3) and (4.) The return spring (17) makes it possible to avoid distribution noises by keeping the contact between the latch and the cam.

En position B du tiroir:
l'huile arrive en pression (9) à travers le clapet (14') et pénétre par le conduit (12) sous le piston (7), le trou de vidange étant obstrué par le tiroir (8), la came (3) prend action. La came (2) perd alors toute action sur son linguet (7").In position B of the drawer:
the oil arrives under pressure (9) through the valve (14 ') and enters through the conduit (12) under the piston (7), the drain hole being obstructed by the drawer (8), the cam (3) takes action. The cam (2) then loses all action on its latch (7 ").

En position C du tiroir:
I'huile arrive en pression (9) à travers le clapet (14) et pénétre sous son piston (7'). La came (4) prend action. Les autres pistons perdent toute action, le tiroir (8) les mettant en position vidange
Les débattement des linguets mobiles sont calculés en fonction des levées respectives des cames et du rapport de levier de culbuteur. Les culbuteurs fabriqués en alliage léger peuvent être chemisés dans les allésages recevant les pistons. Suivant le cas voulu, le linguet (7") peut lui aussi être mobile monté mobile (variante). La vis de réglage (I8) de culbuteur sert à donner le jeu de fonctionnement à la came (2) actionnant le linguet fixe. Une grande progréssivité est obtenue dans les changements successifs de came de travail. In position C of the drawer:
The oil comes under pressure (9) through the valve (14) and penetrates under its piston (7 '). The cam (4) takes action. The other pistons lose all action, the drawer (8) putting them in the drain position
The travel of the movable catches is calculated as a function of the respective lifts of the cams and of the rocker lever ratio. Rockers made of light alloy can be lined in the bores receiving the pistons. Depending on the desired case, the latch (7 ") can also be movable mounted mobile (variant). The rocker adjustment screw (I8) is used to give the operating clearance to the cam (2) actuating the fixed latch. great progressiveness is obtained in the successive changes of working cam.

Claims (10)

RevendicationsClaims 1) Dispositif de levée et temps d'ouvertures variables d'une soupape dans un moteur à combustion interne caractérisé en ce qu'il est constitué, d'un culbuteur (6) qui intègre au moins un piston hydraulique (7) en forme de linguet et d'un arbre à cames (5) possédant au moins deux cames (2, 3) actionnant le dit culbuteur par l'intermédiaire de la pression d'huile (9) distribuée par un tiroir (8) qui active ou non le dit piston (7) pour lever la soupape (1) et un linguet fixe (7") qui active la came (2) suivant les paramètres moteur.1) lifting device and variable opening time of a valve in an internal combustion engine characterized in that it consists of a rocker arm (6) which incorporates at least one hydraulic piston (7) in the form of latch and a camshaft (5) having at least two cams (2, 3) actuating the said rocker arm by means of the oil pressure (9) distributed by a slide (8) which activates or not the said piston (7) for lifting the valve (1) and a fixed latch (7 ") which activates the cam (2) according to the engine parameters. 2) Dispositif selon la revendication 1 caractérisé en ce qu'if possède un linguet fixe (7") qui actionne la soupape (1) par l'intermédiaire de la came (2).2) Device according to claim 1 characterized in that if it has a fixed latch (7 ") which actuates the valve (1) via the cam (2). 3) Dispositif selon la revendication 1 caractérisé en ce que le piston (7) possède un dispositif(16) évitant sa rotation (tel que par exemple une bille et un ressort).3) Device according to claim 1 characterized in that the piston (7) has a device (16) preventing its rotation (such as for example a ball and a spring). 4) Dispositif selon la revendication t caractérisé en ce qu'un ressort (17) maintient le piston contre sa came en position passive. 4) Device according to claim t characterized in that a spring (17) maintains the piston against its cam in the passive position. 5) Dispositif selon la revendication I caractérisé en ce que la came attaque le culbuteur entre son point de pivot et la soupape par le dessus du culbuteur.5) Device according to claim I characterized in that the cam attacks the rocker arm between its pivot point and the valve from above the rocker arm. 6) Dispositif selon la revendication 1 caractérisé en ce que la came attaque le culbuteur par le dessous. Le point de pivot du culbuteur se trouve entre la came et la soupape. 6) Device according to claim 1 characterized in that the cam attacks the rocker from below. The rocker pivot point is between the cam and the valve. 7) Dispositif selon la revendication I caractérisé en ce que le culbuteur possède au moins un conduit de vidange (19) et un conduit d'arrivée d'huile (t 2) muni d'un clapet (14) anti-retour.7) Device according to claim I characterized in that the rocker has at least one drain pipe (19) and an oil inlet pipe (t 2) provided with a non-return valve (14). 8) Dispositif selon la revendication I et 2 caractérisé en ce que le tiroir active un seul piston à la fois tout en libérant les autres de toute action sur la soupape 8) Device according to claim I and 2 characterized in that the slide activates a single piston at a time while releasing the others from any action on the valve 9) Dispositif selon l'une des revendications précédentes caractérisé en ce qu'il possède trois linguets 7,7,7" pouvant simultanément activer ou non une soupape (1). 9) Device according to one of the preceding claims, characterized in that it has three 7.7,7 "latches which can simultaneously activate or not a valve (1). 10) Dispositif selon les revendications 1,2,3,4,5,6,7,8 caractérisé en ce que tous les linguets (7,7',7") peuvent être mobiles et actionnés ou non par le tiroir (8). 10) Device according to claims 1,2,3,4,5,6,7,8 characterized in that all the latches (7,7 ', 7 ") can be mobile and actuated or not by the drawer (8) .
FR9212803A 1992-10-16 1992-10-16 Device for controlling the lift and variable opening of a valve Pending FR2709149A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR9212803A FR2709149A1 (en) 1992-10-16 1992-10-16 Device for controlling the lift and variable opening of a valve
FR9213805A FR2709150B1 (en) 1992-10-16 1992-11-10 Device for controlling lift and variable opening time of a valve.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9212803A FR2709149A1 (en) 1992-10-16 1992-10-16 Device for controlling the lift and variable opening of a valve

Publications (1)

Publication Number Publication Date
FR2709149A1 true FR2709149A1 (en) 1995-02-24

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FR (1) FR2709149A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843077A1 (en) * 1996-11-18 1998-05-20 Toyota Jidosha Kabushiki Kaisha Valve performance control apparatus for internal combustion engines
DE10020884A1 (en) * 2000-04-28 2001-10-31 Mahle Ventiltrieb Gmbh Controller for internal combustion engine inlet or exhaust valve has arrangement in actuator base body for changing contact relationship of force input regions and control contours
CN100410513C (en) * 2006-01-19 2008-08-13 山东大学 Valve timing continuously variable internal combustion engine valve system
EP3444451A1 (en) * 2017-08-18 2019-02-20 MAN Truck & Bus AG Power transmission device for variably controlling valve
RU2774013C2 (en) * 2017-08-18 2022-06-14 Ман Трак Энд Бас Аг Force transfer mechanism for adjustable valve drive
GB2617166A (en) * 2022-03-31 2023-10-04 Cummins Inc Systems and methods for lash adjustment and cylinder deactivation for internal combustion engines

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843077A1 (en) * 1996-11-18 1998-05-20 Toyota Jidosha Kabushiki Kaisha Valve performance control apparatus for internal combustion engines
US6112711A (en) * 1996-11-18 2000-09-05 Toyota Jidosha Kabushiki Kaisha Valve performance control apparatus for internal combustion engines
DE10020884A1 (en) * 2000-04-28 2001-10-31 Mahle Ventiltrieb Gmbh Controller for internal combustion engine inlet or exhaust valve has arrangement in actuator base body for changing contact relationship of force input regions and control contours
WO2001083952A1 (en) 2000-04-28 2001-11-08 Mahle Ventiltrieb Gmbh Control device for an intake valve or exhaust valve of an internal combustion engine
US6640761B2 (en) 2000-04-28 2003-11-04 Mahle Ventiltrieb Gmbh Control device for an intake valve or exhaust valve of an internal combustion engine
CN100410513C (en) * 2006-01-19 2008-08-13 山东大学 Valve timing continuously variable internal combustion engine valve system
EP3444451A1 (en) * 2017-08-18 2019-02-20 MAN Truck & Bus AG Power transmission device for variably controlling valve
DE102017118852A1 (en) * 2017-08-18 2019-02-21 Man Truck & Bus Ag Power transmission device for variable valve train
CN109404083A (en) * 2017-08-18 2019-03-01 曼卡车和巴士股份公司 Force transfering device for variable tappet gear
JP2019035411A (en) * 2017-08-18 2019-03-07 エムアーエヌ トラック アンド バス アーゲーＭＡＮ Ｔｒｕｃｋ ＆ Ｂｕｓ ＡＧ Force transmission device for variable valve drive
US10895175B2 (en) 2017-08-18 2021-01-19 Man Truck & Bus Ag Force transmission device for variable valve drive
EP3892831A1 (en) * 2017-08-18 2021-10-13 MAN Truck & Bus SE Power transmission device for variably controlling valve
CN109404083B (en) * 2017-08-18 2022-03-08 曼卡车和巴士股份公司 Force transmission device for a variable valve drive
RU2774013C2 (en) * 2017-08-18 2022-06-14 Ман Трак Энд Бас Аг Force transfer mechanism for adjustable valve drive
GB2617166A (en) * 2022-03-31 2023-10-04 Cummins Inc Systems and methods for lash adjustment and cylinder deactivation for internal combustion engines

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