EP0052554A1 - Variable distribution device for an internal-combustion engine - Google Patents
Variable distribution device for an internal-combustion engine Download PDFInfo
- 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
Links
Images
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.
Landscapes
- 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.
- - 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
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
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
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
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
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
Claims (2)
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 |
Family
ID=9247935
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)
Country | Link |
---|---|
US (1) | US4448156A (en) |
EP (1) | EP0052554B1 (en) |
JP (1) | JPS57110708A (en) |
DE (1) | DE3160884D1 (en) |
FR (1) | FR2493915B1 (en) |
Cited By (8)
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 |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925009A (en) * | 1982-08-03 | 1984-02-08 | Nissan Motor Co Ltd | Valve operation switching device of internal combustion engine |
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 |
Citations (6)
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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. |
DE892094C (en) * | 1953-08-20 | Device for reversing 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 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US1283780A (en) * | 1918-11-05 | Compression release | ||
JPS5549026B2 (en) * | 1973-01-09 | 1980-12-09 | ||
US4141333A (en) * | 1975-01-13 | 1979-02-27 | Gilbert Raymond D | Valve train systems of internal combustion engines |
DE2753197A1 (en) * | 1976-12-15 | 1978-06-22 | Eaton Corp | VALVE CONTROL DEVICE |
US4173209A (en) * | 1977-07-14 | 1979-11-06 | Jordan Edgar R | Engine control system and valve deactivator thereof |
US4252093A (en) * | 1977-08-08 | 1981-02-24 | Hazelrigg Henry A | Internal combustion engine |
US4204512A (en) * | 1978-03-27 | 1980-05-27 | Brock Horace T Jr | Cylinder deactivator system |
GB2017820B (en) * | 1978-04-01 | 1982-11-10 | Daimler Benz Ag | Multicylinder internal combustion engine with means for interrupting valve operation |
JPS54140015A (en) * | 1978-04-21 | 1979-10-30 | Toyota Motor Corp | Variable valve engine |
US4203397A (en) * | 1978-06-14 | 1980-05-20 | Eaton Corporation | Engine valve control mechanism |
US4249488A (en) * | 1978-09-14 | 1981-02-10 | General Motors Corporation | Valve lift adjusting device |
-
1980
- 1980-11-13 FR FR8024129A patent/FR2493915B1/en not_active Expired
-
1981
- 1981-10-29 US US06/316,278 patent/US4448156A/en not_active Expired - Fee Related
- 1981-11-03 DE DE8181401761T patent/DE3160884D1/en not_active Expired
- 1981-11-03 EP EP81401761A patent/EP0052554B1/en not_active Expired
- 1981-11-13 JP JP56181234A patent/JPS57110708A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE892094C (en) * | 1953-08-20 | Device for reversing internal combustion engines | ||
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)
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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