EP0052554A1 - Variable distribution device for an internal-combustion engine - Google Patents

Variable distribution device for an internal-combustion engine Download PDF

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Publication number
EP0052554A1
EP0052554A1 EP81401761A EP81401761A EP0052554A1 EP 0052554 A1 EP0052554 A1 EP 0052554A1 EP 81401761 A EP81401761 A EP 81401761A EP 81401761 A EP81401761 A EP 81401761A EP 0052554 A1 EP0052554 A1 EP 0052554A1
Authority
EP
European Patent Office
Prior art keywords
rocker
distribution device
variable distribution
rocker arm
combustion engine
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.)
Granted
Application number
EP81401761A
Other languages
German (de)
French (fr)
Other versions
EP0052554B1 (en
Inventor
Claude Henault
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.)
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of EP0052554A1 publication Critical patent/EP0052554A1/en
Application granted granted Critical
Publication of EP0052554B1 publication Critical patent/EP0052554B1/en
Expired 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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms

Definitions

  • the present invention relates to a variable distribution device for modifying at will the distribution of an internal combustion engine with controlled ignition.
  • the distribution is ensured by a camshaft carrying an intake cam and an exhaust cam controlling respectively, either directly or via a rocker arm, the intake and exhaust valves.
  • a camshaft carrying an intake cam and an exhaust cam controlling respectively, either directly or via a rocker arm, the intake and exhaust valves.
  • the invention aims more precisely to provide a simple device making it possible no longer to produce a continuously variable distribution, but a two-stage device therefore with two cams.
  • variable distribution device is characterized in that it comprises at least two rocker arms each controlled by a cam of configuration suitable for a determined load of the motor, and having an element common connectable slidingly mounted on the rocker arm ramp and arranged to control the intake valve of a cylinder of the engine, this connectable element being associated with control means making it possible to connect and disconnect it at will from one or the other rocker.
  • These intake cams C 1 , C 2 are intended to actuate respectively two rocker arms 2 ef 3 articulated on a shaft 13 and immobilized in translation by pins 14 moving in corresponding grooves provided on the internal face of the rocker arms.
  • the rocker arms 2, 3 are provided with latching means, for example a notched structure (15), intended to be fitted into a corresponding structure provided on each of the side faces of the element. connectable 1 common to the two rocker arms 2, 3.
  • This connectable element 1 is capable of being actuated in translation by means of a control device 7, 8 enabling it to be engaged either on the rocker arm 2 or on the rocker arm 3 and to respectively control the valve 10 or by the cam C 1 either by cam C 2 .
  • the disconnectable element 1 slidably mounted on the shaft 13 is shaped so as to present on the one hand a zone 1a cooperating with the fork 8 secured to the shaft 7, and on the other hand a zone 1b carrying a rocker screw which can slide a sufficient distance owing to the fact that the upper face of the cup 10a is at the level of the shank 10 of the valve
  • Springs 5, 6 are respectively provided for holding the rocker arms 2, 3 in abutment on their respective cams C 1 , C 2 .
  • the means for controlling the element 1 in translation on the shaft 13 can be actuated in any suitable manner, for example mechanically, hydraulically (using the engine oil pressure) or electrically.
  • Such a device provided that the cams are judiciously sized, that is to say one optimized for partial loads, the other for full loads, ensures a good compromise in operation over the entire speed range and engine load.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

Le dispositif comporte au moins deux culbuteurs (2, 3) commandés chacun par une came de configuration appropriée à une charge déterminée du moteur, et présentant un élément connectable (1) commun monté coulissant sur la rampe (13) de culbuteur et agencé pour commander la soupape d'admission d'un cylindre du moteur, cet élément connectable (1) étant associé à des moyens (8) de commande permettant de le connecter et de le déconnecter à volonté de l'un (2) ou l'autre (3) culbuteur.The device comprises at least two rocker arms (2, 3) each controlled by a cam of configuration suitable for a determined load of the motor, and having a common connectable element (1) slidably mounted on the rocker arm ramp (13) and arranged to control the intake valve of an engine cylinder, this connectable element (1) being associated with control means (8) making it possible to connect and disconnect it at will from one (2) or the other ( 3) rocker arm.

Description

La présente invention a pour objet un dispositif de distribution variable permettant de modifier à volonté la distribution d'un moteur à combustion interne à allumage commandéoThe present invention relates to a variable distribution device for modifying at will the distribution of an internal combustion engine with controlled ignition.

De nombreux dispositifs de l'art antérieur visent à modifier la distribution d'un moteur à combustion interne de manière à adapter celle-ci pour toutes les conditions de marche et plus particulièrement dans les conditions de marche en charge partielle.Many devices of the prior art aim to modify the distribution of an internal combustion engine so as to adapt it for all operating conditions and more particularly in operating conditions under partial load.

Généralement, la distribution est assurée par un arbre à cames portant une came d'admission et une came d'échappement pilotant respectivement, soit directement soit par l'intermédiaire d'un culbuteur, les soupapes d'admission et d'échappement. Pour assurer un calage en phase et en amplitude correcte pour toutes les conditions de marche, il faudrait une infinité de cames, ce qui se traduirait par une réalisation complexe et onéreuse.Generally, the distribution is ensured by a camshaft carrying an intake cam and an exhaust cam controlling respectively, either directly or via a rocker arm, the intake and exhaust valves. To ensure correct timing and amplitude for all operating conditions, an infinite number of cams would be required, which would result in a complex and costly production.

Tous les dispositifs de ce type connus jusqu'à ce jour, qu'ils soient mécaniques, hydrauliques ou électriques, visent un fonctionnement continuement variable du système de distribution, et par conséquent sont compliqués et chers.All devices of this type known to date, whether mechanical, hydraulic or electrical, aim for continuously variable operation of the distribution system, and therefore are complicated and expensive.

L'invention vise plus précisément à fournir un dispositif simple permettant non plus de réaliser une distribution continuement variable, mais un dispositif à deux étages donc à deux cames.The invention aims more precisely to provide a simple device making it possible no longer to produce a continuously variable distribution, but a two-stage device therefore with two cams.

Le dispositif de distribution variable selon l'invention est caractérisé par le fait qu'il comporte au moins deux culbuteurs commandés chacun par une came de configuration appropriée à une charge déterminée du moteur, et présentant un élément connectable commun monté coulissant sur la rampe de culbuteur et agencé pour commander la soupape d'admission d'un cylindre du moteur, cet élément connectable étant associé à des moyens de commande permettant de le connecter et de le déconnecter à volonté de l'un ou l'autre culbuteur.The variable distribution device according to the invention is characterized in that it comprises at least two rocker arms each controlled by a cam of configuration suitable for a determined load of the motor, and having an element common connectable slidingly mounted on the rocker arm ramp and arranged to control the intake valve of a cylinder of the engine, this connectable element being associated with control means making it possible to connect and disconnect it at will from one or the other rocker.

L'invention sera mieux comprise à la lecture de la description non limitative suivante d'une forme de réalisation de dispositif de distribution variable discontinue pour moteur à combustion interne, en référence au dessin annexé dans lequel :

  • - la figure 1 est une vue latérale du dispositif de distribution variable selon l'invention ;
  • - la figure 2 est une vue de dessus du dispositif de la figure 1 ;
  • - la figure 3 est une vue latérale en coupe transverse partielle du dispositif de la figure 1.
The invention will be better understood on reading the following nonlimiting description of an embodiment of a discontinuous variable distribution device for an internal combustion engine, with reference to the appended drawing in which:
  • - Figure 1 is a side view of the variable dispensing device according to the invention;
  • - Figure 2 is a top view of the device of Figure 1;
  • - Figure 3 is a side view in partial cross section of the device of Figure 1.

Sur l'arbre à came du dispositif de distribution variable selon l'invention sont montées deux cames d'admission C1, C2 et une came d'échappement C3.On the camshaft of the variable distribution device according to the invention are mounted two intake cams C 1 , C 2 and an exhaust cam C 3 .

Ces cames d'admission C1, C2 sont destinées à actionner respectivement deux culbuteurs 2 ef 3 articulés sur un arbre 13 et immobilisés en translation par des pions 14 se déplaçant dans des rainures correspondantes prévues sur la face interne des culbuteurs. Sur leurs faces latérales en regard, les culbuteurs 2, 3 sont pourvus de moyens d'enclenchement, par exemple une structure à crans (15), destinée à venir s'emboîter dans une structure correspondante prévue sur chacune des faces latérales de l'élément connectable 1 commun aux deux culbuteurs 2, 3.These intake cams C 1 , C 2 are intended to actuate respectively two rocker arms 2 ef 3 articulated on a shaft 13 and immobilized in translation by pins 14 moving in corresponding grooves provided on the internal face of the rocker arms. On their facing side faces, the rocker arms 2, 3 are provided with latching means, for example a notched structure (15), intended to be fitted into a corresponding structure provided on each of the side faces of the element. connectable 1 common to the two rocker arms 2, 3.

Cet élément connectable 1 est susceptible d'être actionné en translation au moyen d'un dispositif de commande 7, 8 permettant de l'enclencher soit sur le culbuteur 2 soit sur le culbuteur 3 et de commander respectivement la soupape 10 soit par la came C1 soit par la came C2.This connectable element 1 is capable of being actuated in translation by means of a control device 7, 8 enabling it to be engaged either on the rocker arm 2 or on the rocker arm 3 and to respectively control the valve 10 or by the cam C 1 either by cam C 2 .

A cet effet, l'élément déconnectable 1 monté à coulisse sur l'arbre 13 est conformé de façon à présenter d'une part une zone 1a coopérant avec la fourchette 8 solidarisée à l'arbre 7, et d'autre part une zone 1b portant une vis de culbuteur pouvant glisser sur une distance suffisante du fait que la face supérieure de la coupelle 10a est au niveau de la queue 10 de soupapeoTo this end, the disconnectable element 1 slidably mounted on the shaft 13 is shaped so as to present on the one hand a zone 1a cooperating with the fork 8 secured to the shaft 7, and on the other hand a zone 1b carrying a rocker screw which can slide a sufficient distance owing to the fact that the upper face of the cup 10a is at the level of the shank 10 of the valve

Des ressorts 5, 6 sont respectivement prévus pour maintenir les culbuteurs 2, 3 en appui sur leurs cames respectives C1, C2.Springs 5, 6 are respectively provided for holding the rocker arms 2, 3 in abutment on their respective cams C 1 , C 2 .

Les moyens de commande de l'élément 1 en translation sur l'arbre 13 peuvent être actionnés de toute façon appropriée, par exemple mécaniquement, hydrauliquement (en utilisant la pression d'huile du moteur) ou électriquement.The means for controlling the element 1 in translation on the shaft 13 can be actuated in any suitable manner, for example mechanically, hydraulically (using the engine oil pressure) or electrically.

Un tel dispositif, pour autant que les cames soient judicieusement dimensionnées, c'est-à-dire une optimisée pour les charges partielles, l'autre pour les pleines charges, permet d'assurer un bon compromis de fonctionnement sur toute la plage de régime et de charge d'un moteur.Such a device, provided that the cams are judiciously sized, that is to say one optimized for partial loads, the other for full loads, ensures a good compromise in operation over the entire speed range and engine load.

Il est évident que l'invention n'est nullement limitée à la forme de réalisation décrite ci-dessus, mais qu'elle englobe toutes les modifications et variantes issues du même principe de base, c'est ainsi qu'on peut également prévoir que l'élément connectable 1 présente un débattement suffisant en translation sur la rampe 13 pour ne s'enclencher avec aucun des culbuteurs, mettant ainsi le cylindre hors service.It is obvious that the invention is in no way limited to the embodiment described above, but that it encompasses all the modifications and variants resulting from the same basic principle, this is how it can also be foreseen that the connectable element 1 has sufficient travel in translation on the ramp 13 so as not to engage with any of the rockers, thus putting the cylinder out of service.

Claims (2)

1. Dispositif de distribution variable pour moteur à combustion inte ne comprenant, pour chaque soupape d'admission, un culbuteur composite à éléments sélectivement acccuplables coopérant avec deux cames de configuration appropriée à des charges différentes du moteur, caractérisé en ce que le culbuteur comprend, de part et d'autre d'un élément de culbuteur(l) monté coulissant sur la rampe (13) de culbuteur et commandant la soupape, deux éléments de culbuteur (2,3) coopérant respectivement avec les deux cames précitées (Cl,C2) et avec l'un ou l'autre desquels l'élément de culbuteur coulissant (1) est accouplable par engagement de formes conjuguées (15) à l'aide d'une commande de translation (7,8) sur sa rampe.1. Variable distribution device for an internal combustion engine comprising, for each inlet valve, a composite rocker arm with selectively acccuplable elements cooperating with two cams of configuration suitable for different loads of the engine, characterized in that the rocker arm comprises, on either side of a rocker element (l) slidably mounted on the rocker arm ramp (13) and controlling the valve, two rocker elements (2,3) cooperating respectively with the two aforementioned cams (Cl, C2 ) and with one or the other of which the sliding rocker element (1) can be coupled by engagement of conjugate shapes (15) using a translation control (7,8) on its ramp. 2. Dispositif de distribution variable selon la revendication 1, caractérisé en ce que ledit élément de culbuteur coulissant (1) comporte une position de point mort entre les deux éléments de culbuteurs (2,3) avec lesquels il est accouplable, correspondant à une position de commande de mise hors service de la soupape et du cylindre correspondant du moteur.2. Variable distribution device according to claim 1, characterized in that said sliding rocker element (1) has a neutral position between the two rocker elements (2,3) with which it can be coupled, corresponding to a position for switching off the valve and the corresponding cylinder of the engine.
EP81401761A 1980-11-13 1981-11-03 Variable distribution device for an internal-combustion engine Expired EP0052554B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8024129 1980-11-13
FR8024129A FR2493915B1 (en) 1980-11-13 1980-11-13 VARIABLE DISTRIBUTION DEVICE FOR INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
EP0052554A1 true EP0052554A1 (en) 1982-05-26
EP0052554B1 EP0052554B1 (en) 1983-09-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401761A Expired EP0052554B1 (en) 1980-11-13 1981-11-03 Variable distribution device for an internal-combustion engine

Country Status (5)

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US (1) US4448156A (en)
EP (1) EP0052554B1 (en)
JP (1) JPS57110708A (en)
DE (1) DE3160884D1 (en)
FR (1) FR2493915B1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541721A1 (en) * 1983-02-24 1984-08-31 Ford France INTERNAL COMBUSTION ENGINE WITH VARIABLE CONTROL TIME WITH LOAD
FR2556774A1 (en) * 1983-12-17 1985-06-21 Honda Motor Co Ltd DEVICE FOR STOPPING THE VALVE CONTROL FOR A MULTI-CYLINDER ENGINE
US4690110A (en) * 1985-04-26 1987-09-01 Mazda Motor Corporation Variable valve mechanism for internal combustion engines
US4726332A (en) * 1985-04-26 1988-02-23 Mazda Motor Corporation Variable valve mechanism for internal combustion engines
EP0687804A1 (en) * 1994-06-15 1995-12-20 Honda Giken Kogyo Kabushiki Kaisha Valve operating apparatus for internal combustion engine
FR2735178A1 (en) * 1995-06-09 1996-12-13 Renault Variable inlet and outlet valve control for internal combustion engine
DE102004045144B4 (en) * 2003-09-18 2014-07-17 Mitsubishi Jidosha Kogyo K.K. Valve train with cylinder deactivation mechanism of an internal combustion engine
DE102004045148B4 (en) * 2003-09-18 2014-10-30 Mitsubishi Jidosha Kogyo K.K. Valve train with cylinder deactivation mechanism of an internal combustion engine

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AU551310B2 (en) * 1983-06-06 1986-04-24 Honda Giken Kogyo Kabushiki Kaisha Valve actuating mechanism
DE3519471A1 (en) * 1984-06-23 1986-01-02 Volkswagenwerk Ag, 3180 Wolfsburg Reciprocating piston internal combustion engine
JPS6131613A (en) * 1984-07-24 1986-02-14 Honda Motor Co Ltd Valve operation pause device for internal-combustion engine
JPS62174516A (en) * 1986-01-29 1987-07-31 Fuji Heavy Ind Ltd Tappet device for car engine
JPS6357806A (en) * 1986-08-27 1988-03-12 Honda Motor Co Ltd Valve mechanism for internal combustion engine
JPS63100211A (en) * 1986-10-15 1988-05-02 Honda Motor Co Ltd Valve mechanism of internal combustion engine
US4887563A (en) * 1986-10-16 1989-12-19 Honda Giken Kogyo Kabushiki Kaisha Valve operating apparatus for an internal combustion engine
JPS63106308A (en) * 1986-10-23 1988-05-11 Honda Motor Co Ltd Valve action timing selector for internal combustion engine
US4905639A (en) * 1986-10-23 1990-03-06 Honda Giken Kogyo Kabushiki Kaisha Valve operating apparatus for an internal combustion engine
US4793296A (en) * 1987-01-30 1988-12-27 Honda Giken Kogyo Kabushiki Kaisha Valve operating mechanism for internal combustion engine
EP0276531B1 (en) * 1987-01-30 1992-07-22 Honda Giken Kogyo Kabushiki Kaisha Valve operating mechanism for internal combustion engine
JPS6419131A (en) * 1987-07-13 1989-01-23 Honda Motor Co Ltd Moving valve control device for internal combustion engine
US5175562A (en) * 1989-06-23 1992-12-29 Northeastern University High aperture-efficient, wide-angle scanning offset reflector antenna
DE4308535A1 (en) * 1992-03-30 1993-10-07 Volkswagen Ag Internal combustion engine with a deactivatable charge exchange valve
JP4476241B2 (en) * 2005-06-20 2010-06-09 日立オートモティブシステムズ株式会社 Valve operating device for internal combustion engine
DE102010005790B4 (en) * 2010-01-25 2012-03-15 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Valve gear for actuating gas exchange valves of internal combustion engines

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FR2406087A1 (en) * 1977-08-20 1979-05-11 Maschf Augsburg Nuernberg Ag METHOD AND DEVICE FOR STARTING A FOUR-STROKE INTERNAL COMBUSTION ENGINE WITH AIR COMPRESSION

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FR393826A (en) * 1908-07-22 1909-01-07 Siegfried Barth Gear shift device for combustion engines
US1622492A (en) * 1925-04-06 1927-03-29 Coatalen Louis Valve-operating mechanism
CH264716A (en) * 1946-03-12 1949-10-31 Ford Motor Co Valve control for internal combustion engines.
FR2356006A1 (en) * 1976-06-24 1978-01-20 Jordan Edgar MECHANISM FOR TAKING OUT OF SERVICE A CYLINDER OF AN INTERNAL COMBUSTION ENGINE
FR2406087A1 (en) * 1977-08-20 1979-05-11 Maschf Augsburg Nuernberg Ag METHOD AND DEVICE FOR STARTING A FOUR-STROKE INTERNAL COMBUSTION ENGINE WITH AIR COMPRESSION

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541721A1 (en) * 1983-02-24 1984-08-31 Ford France INTERNAL COMBUSTION ENGINE WITH VARIABLE CONTROL TIME WITH LOAD
FR2556774A1 (en) * 1983-12-17 1985-06-21 Honda Motor Co Ltd DEVICE FOR STOPPING THE VALVE CONTROL FOR A MULTI-CYLINDER ENGINE
US4690110A (en) * 1985-04-26 1987-09-01 Mazda Motor Corporation Variable valve mechanism for internal combustion engines
US4726332A (en) * 1985-04-26 1988-02-23 Mazda Motor Corporation Variable valve mechanism for internal combustion engines
EP0687804A1 (en) * 1994-06-15 1995-12-20 Honda Giken Kogyo Kabushiki Kaisha Valve operating apparatus for internal combustion engine
FR2735178A1 (en) * 1995-06-09 1996-12-13 Renault Variable inlet and outlet valve control for internal combustion engine
DE102004045144B4 (en) * 2003-09-18 2014-07-17 Mitsubishi Jidosha Kogyo K.K. Valve train with cylinder deactivation mechanism of an internal combustion engine
DE102004045148B4 (en) * 2003-09-18 2014-10-30 Mitsubishi Jidosha Kogyo K.K. Valve train with cylinder deactivation mechanism of an internal combustion engine

Also Published As

Publication number Publication date
FR2493915B1 (en) 1985-12-06
DE3160884D1 (en) 1983-10-20
JPS57110708A (en) 1982-07-09
EP0052554B1 (en) 1983-09-14
FR2493915A1 (en) 1982-05-14
US4448156A (en) 1984-05-15

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