EP3453850B1 - Commande de soupape variable - Google Patents

Commande de soupape variable Download PDF

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Publication number
EP3453850B1
EP3453850B1 EP18186844.9A EP18186844A EP3453850B1 EP 3453850 B1 EP3453850 B1 EP 3453850B1 EP 18186844 A EP18186844 A EP 18186844A EP 3453850 B1 EP3453850 B1 EP 3453850B1
Authority
EP
European Patent Office
Prior art keywords
swivelling
variable valve
lever
rocker arm
valve train
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.)
Active
Application number
EP18186844.9A
Other languages
German (de)
English (en)
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EP3453850A1 (fr
Inventor
Peter Bogdanski
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 Truck and Bus SE
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MAN Truck and Bus SE
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Publication date
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Publication of EP3453850A1 publication Critical patent/EP3453850A1/fr
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Publication of EP3453850B1 publication Critical patent/EP3453850B1/fr
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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
    • F01L1/12—Transmitting gear between valve drive and valve
    • 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
    • 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
    • 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
    • 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
    • F01L13/0063—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 by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/032—Electric motors

Definitions

  • the invention relates to a variable valve drive for an internal combustion engine.
  • variable valve drives for changing switching times and valve lifts of gas exchange valves of an internal combustion engine during operation of the internal combustion engine.
  • a large number of variable valve trains are known in the prior art.
  • the US 2005/0150472 A1 discloses an example of a variable valve train.
  • the variable valve train has a camshaft which is rotatably mounted on a fixed part of the engine and comprises a cam.
  • a first rocker arm is pivotably mounted on a fixed part of the engine. The first rocker arm is engaged with a stem of an engine valve.
  • a rotatable drum is carried by a fixed part of the motor and at least partially surrounds the cam.
  • a second rocker arm is pivotably mounted on the drum.
  • a control element is provided for rotating the drum.
  • the second rocker arm has a cam follower that follows the cam of the camshaft.
  • the first rocker arm has a roller in contact with a support surface of the second rocker arm.
  • the JP H06 10633 A discloses a system with a rocker arm operating a valve. Another lever transfers a cam contour of a cam to the rocker arm. The further lever is pivotably mounted on a pin which is held by a pin holder. The pen holder is fixedly attached to a rotatable gear that can be rotated by a drive gear to adjust the valve control cam.
  • the DE 42 20 816 A1 discloses several designs for variable valve trains.
  • a rocker arm is provided in which a cam follower is slidably mounted.
  • the cam carrier is shifted by means of a lever construction and a rotatable shaft.
  • variable valve trains with rocker arms are, for example, from the US 2009/0151674 A1 and the DE 10 2004 040 652 A1 known.
  • variable valve trains such as the variable valve train from the US 2005/0150472 A1 , is that these often have a complicated structure, a large number of parts and / or a large installation space.
  • variable valve drive should have a simple structure, few parts and / or only a small amount of installation space.
  • variable valve train according to the independent claim.
  • the variable valve train is suitable for an internal combustion engine.
  • the variable valve train has a camshaft with a cam.
  • the variable valve drive has a rocker arm for actuating at least one gas exchange valve of the internal combustion engine.
  • the variable valve train has a pivot lever element, in particular a pivot lever link, which has a contact surface and a cam follower. The contact surface is in operative connection, in particular in contact, with the rocker arm and the cam follower follows a cam contour of the cam.
  • the variable valve drive has a first lever arm which pivots the pivot lever element and which is connected to a drivable pivot shaft for pivoting about a longitudinal axis of the pivot shaft.
  • the variable valve drive enables a variable transmission of the cam contour to the rocker arm by changing a position of a pivot axis which pivotally connects the pivot lever element to the first lever arm.
  • an adjustment of the lever arm by means of the pivot shaft causes the position of the pivot axis to be changed, which leads to a displacement movement of the pivot lever element.
  • the contact positions between the rocker arm, the pivot lever element and the cam change. The changed contact positions can be used to implement different "translations" of the cam contour on the rocker arm through the swivel lever element and thus to influence the height of the maximum valve lift.
  • valve train In order to ensure the variability of the valve train, only a few additional parts are required compared to a non-variable valve train. These include in particular the first lever arm and the pivot lever element.
  • the comparatively simple construction also enables a robust system and, depending on the design, requires little additional space.
  • the rocker arm can preferably be in operative connection with the cam for actuating the at least one gas exchange valve via the contact surface of the swivel lever element and the cam follower of the swivel lever element.
  • the rocker arm is mounted pivotably about the pivot shaft. Additionally or alternatively, the pivot shaft serves as a rocker arm axis for the rocker arm. Such a configuration considerably reduces the installation space of the variable valve drive, since it is not necessary to provide a shaft for pivoting the first lever arm and a rocker arm axis for the pivotable connection to the rocker arm separately from one another.
  • a rotation of the pivot shaft causes the first lever arm and the pivot lever element to pivot, so that a transmission the cam contour of the cam is variable from the pivot lever element to the rocker arm, in particular steplessly.
  • the valve lift curve transmitted to the at least one gas exchange valve can be changed by changing the position of the pivot axis which pivotally connects the first lever arm and the pivot lever element by pivoting the first lever arm.
  • the transmission can be changed to change a valve lift maximum of the at least one gas exchange valve, in particular up to a zero lift of the at least one gas exchange valve.
  • the first lever arm is connected to the pivot shaft in a rotationally fixed manner. Due to the rigid connection, a rotary movement of the pivot shaft can be transmitted directly to the first lever arm for pivoting the same.
  • the first lever arm can be directly non-rotatably connected to the pivot shaft or indirectly non-rotatably connected to the pivot shaft via an interposition of one or more intermediate members, for example a sleeve surrounding the pivot shaft.
  • the pivot lever element is pivoted relative to the first lever arm when the cam follower follows the cam contour of the cam.
  • a pivot axis is provided which connects the first lever arm and the pivot lever element to one another in a pivotable manner.
  • the pivotable connection (pivot axis) between the pivot lever element and the first lever arm can thus fulfill two tasks.
  • the pivoting lever element can be pivoted in order to follow the cam contour of the cam.
  • the connection (pivot axis) serves as a suspension for the pivot lever element, the position of which can be changed by means of the first lever arm in order to change the valve lift curve of the at least one gas exchange valve.
  • the rocker arm has a rotatable roller for contacting the contact surface.
  • the rotatable roller can rest on the contact surface.
  • the contact surface can have a continuous profile.
  • the rotatable roller can enable a stepless adjustment of the variable valve train.
  • cam follower of the swivel lever element and the rotatable roller of the rocker arm can be designed identically. This means that the cam follower and the role of the rocker arm can be designed as identical parts. This reduces the variety of parts.
  • the contact surface is concave.
  • the contact surface can, however, also be implemented flat or convex. This depends on the selected lever ratios of the valve train.
  • the pivot shaft can only be rotated in a limited angular range of less than 360 °, in particular in an angular range of less than 120 °. This can be due to the fact that the first lever arm only has to be pivoted in a small angular range in order to pivot the pivot lever element in order to change the transmission of the cam contour to the rocker arm.
  • the limited angular range required for rotating the pivot shaft can have an influence on a drive unit of the pivot shaft and a connection between the drive unit and the pivot shaft.
  • the pivot shaft can preferably be rotatably mounted in bearing blocks which are preferably fastened to a cylinder head of the internal combustion engine.
  • variable valve drive has a second lever arm which is connected to the first lever arm via the pivot shaft and, in particular, via the pivot axis.
  • the first lever arm and the second lever arm can in particular be arranged on opposite sides of the rocker arm.
  • a particularly secure mounting for the swivel lever element can be made possible via two lever arms.
  • the arrangement on opposite sides of the rocker arm can be advantageous for reasons of space.
  • the first lever arm can preferably be designed like the second lever arm.
  • the first lever arm and the second lever arm can thus be designed as identical parts. This reduces the variety of parts.
  • variable valve drive also has a sleeve which is arranged on the pivot shaft in a rotationally fixed manner.
  • the first lever arm and / or the second lever arm is non-rotatably arranged on the sleeve.
  • the rocker arm is pivotably arranged around the sleeve.
  • the pivot lever element is arranged between the rocker arm and the camshaft. This is advantageous for reasons of space.
  • variable valve drive has a drive unit for rotating the pivot shaft.
  • the drive unit is drivingly connected to the pivot shaft.
  • the drive unit can be connected to the pivot shaft and / or the drive unit can be designed such that rotation of the pivot shaft is only possible within a limited angular range.
  • a corresponding electric servomotor with an angular range can be used.
  • variable valve drive can have, for example, an actuator which is designed to contact the first lever arm for pivoting the first lever arm.
  • the lever arm can, for example, be adjusted in several stages (in particular in two stages) via the actuator.
  • the actuator When using the actuator to adjust the first lever arm, at least one actuator must be provided for each cylinder. Furthermore, stops can be provided to limit the adjustment of the first lever arm.
  • variable valve drive has a camshaft adjuster, which is connected to the camshaft for adjusting a phase of the camshaft. This allows the variability of the variable valve drive to be increased, since in particular the valve lift curves can be shifted, ie. H. the opening and closing times of the gas exchange valves or the gas exchange valve can be changed.
  • the invention can be used particularly advantageously in a motor vehicle, in particular a commercial vehicle (for example an omnibus or truck).
  • the motor vehicle has the variable valve train as disclosed herein.
  • variable valve train in internal combustion engines that are not included in motor vehicles.
  • it can be stationary internal combustion engines, internal combustion engines on ships or in locomotives.
  • the Figures 1 to 4 show a variable valve train 10.
  • Two gas exchange valves 12 (see in particular Figure 3 ), for example inlet valves or outlet valves, operated.
  • the variable valve drive 10 can be included in an internal combustion engine of a motor vehicle, in particular a commercial vehicle. It is also possible for the variable valve drive to actuate only one gas exchange valve. There is also the possibility that the variable valve drive actuates several gas exchange valves via a valve bridge.
  • the variable valve drive 10 has a camshaft 14, a pivot lever element 16, two lever arms 18 and 20 and a rocker arm 22.
  • the camshaft 14 is rotatably mounted and has a cam 24.
  • the camshaft 14 can be connected to a camshaft adjuster 26 for adjusting a phase of the camshaft 14.
  • the camshaft adjuster 26 is shown schematically in FIG Figure 2 indicated.
  • the camshaft adjuster 26 can rotate the camshaft 14 by a predetermined angular amount clockwise or counterclockwise with respect to a drive by a crankshaft of the internal combustion engine. The opening and closing times of the gas exchange valves 12 can thus be shifted.
  • the pivot lever element 16 carries a cam follower 28.
  • the cam follower 28 follows a cam contour of the cam 24 while the camshaft 14 rotates.
  • the cam follower 28 is designed as a roller rotatably mounted about a cam follower axis 30.
  • the cam follower shaft 30 is carried by a fork 32 of the pivot lever element 16 at opposite ends of the cam follower shaft 30.
  • the fork 32 is arranged at a first end of the pivot lever element 16.
  • the pivot lever element 16 is pivotably connected to the lever arms 18, 20. While the cam follower 28 follows the cam contour of the cam 24 during a rotation of the camshaft 14, the pivot lever element 16 is pivoted relative to the lever arms 18, 20.
  • the pivot lever element 16 has a contact surface 34.
  • the contact surface 34 serves as a contact surface for the rocker arm 22.
  • the contact surface 34 extends concavely and is arranged on an upper side of the swivel lever element 16.
  • the pivot lever element 16 thus serves as a backdrop for the rocker arm 22.
  • the lever arms 18, 20 are non-rotatably connected to a pivot shaft 36, so that they rotate together with the pivot shaft 36.
  • the lever arms 18, 20 rotate when the pivot shaft 36 rotates about a longitudinal axis A of the pivot shaft 36.
  • the pivot shaft 36 also serves as a rocker arm axis for the rocker arm 22. This is particularly advantageous for reasons of installation space, since there are no separate axes for pivoting the lever arms 18 , 20 and must be provided for pivoting the rocker arm 22.
  • the lever arms 18, 20 are connected to one another via the pivot shaft 36 and a pivot axis 38.
  • the lever arms 18, 20 are arranged on opposite sides of the rocker arm 22.
  • the lever arms 18, 20 encompass the pivot lever element 16 at the end of the pivot lever element 16 opposite the fork 32.
  • the lever arms 18, 20 carry the pivot lever element 16 via the pivot axis 38, so that the pivot lever element 16 can be pivoted relative to the lever arms 18, 20.
  • the pivot lever element 16 can for example be connected to the pivot axis 38 in a rotationally fixed manner, the pivot axis 38 in turn being rotatably supported in the lever arms 18, 20.
  • the pivot lever element 16 can be provided pivotably about the pivot axis 38. It is also possible that, for example, only one lever arm is provided which carries the pivot lever element.
  • lever arms 18, 20 are connected to the pivot shaft 36 via a sleeve 40.
  • the lever arms 18, 20 are non-rotatably connected to the sleeve 40, the sleeve 40 in turn being non-rotatably connected to the pivot shaft 36.
  • the non-rotatable connections can be realized, for example, by a suitable fit, by welding, gluing, screwing, interlocking, etc.
  • a drive unit 42 for example an electric drive, is shown schematically.
  • the drive unit 42 is connected to the pivot shaft 36 so that the pivot shaft 36 can be rotated at least within a predetermined angular range, for example less than 360 °, in particular less than 90 °.
  • the angular range depends on the lever arm lengths of the variable valve drive 10 and can, for example, as in the example shown, also be smaller than 20 °.
  • a rotation of the pivot shaft 36 causes the lever arms 18 and 20 to pivot, since these are connected to the pivot shaft 36 in a rotationally fixed manner. Pivoting the lever arms 18 and 20 causes the pivoting lever element 16 to pivot.
  • the pivoting lever element 16 changes a position relative to the rocker arm 22 and the camshaft 14. This enables the cam contour of the cam 24 to be specifically transmitted via the pivoting lever element 16 to the rocker arm 22, which ultimately actuates the gas exchange valves 12 can be influenced, as will be described in more detail below.
  • an actuator 43 can also be provided.
  • the actuator 43 can, for example, contact the first lever arm 18 and / or the second lever arm 20 in order to pivot the first and second lever arms 18, 20.
  • a pivoting of the lever arms 18, 20 in turn causes a pivoting of the pivot lever element 16, as already mentioned above describe is.
  • the lever arms 18, 20 can be rotatably connected to the pivot shaft 36, which thus only serves as a pivot axis.
  • the pivot shaft 36 is rotatably mounted in bearing blocks 44, for example by means of slide bearings or roller bearings (see FIG Figure 3 ).
  • the bearing blocks 44 can be fastened to a cylinder head of the internal combustion engine, for example by means of screws (not shown).
  • the rocker arm 22 is mounted pivotably about the sleeve 40 and thus pivotably about the pivot shaft 36.
  • the provision of the sleeve 40 as an intermediate member between the pivot shaft 36 on the one hand and the lever arms 18, 20 and the rocker arm 22 on the other hand can simplify the assembly of the variable valve drive 10.
  • an assembly consisting of the lever arms 18, 20, the rocker arm 22 and the sleeve 40 can be prefabricated, the lever arms 18, 20 being non-rotatably connected to the sleeve 40 and the rocker arm 22 being rotatably arranged around the sleeve 40.
  • the sleeve 40 can then be connected non-rotatably to the pivot shaft 36.
  • the lever arms 18, 20 can be connected to the pivot shaft 36 in a rotationally fixed manner, for example, directly (that is to say without the interposition of a sleeve).
  • the rocker arm 22 can be pivotably connected to the pivot shaft 36 directly (ie without the interposition of a sleeve). It is also possible to provide other configurations in which the lever arms 18, 20 are connected non-rotatably to the pivot shaft 36 and the rocker arm 22 is pivotably connected to the pivot shaft 36.
  • the rocker arm 22 has a fork 46 which carries a rotatable roller 48 via a roller axle 50.
  • the rotatable roller 48 is in contact with the contact surface 34 of the pivot lever element 16.
  • the cam follower 28 of the pivot lever element 16 and the rotatable roller 48 of the rocker arm 22 can be designed the same, since they transmit approximately the same forces and to reduce the variety of parts.
  • the rocker arm 22 actuates the gas exchange valves 12, for example via a spherical foot (elephant foot, not shown).
  • FIG. 1 and 2 shows how the variable valve train 10 produces an operative connection between the camshaft 14 and the gas exchange valves 12 during operation.
  • the cam follower 28 is in contact with a base circle portion of the cam 24.
  • the cam follower 28 is in contact with a valve lift area of the cam 24.
  • the valve lift area of the cam contour of the cam 24 causes the Swivel lever element 16 about swivel axis 38, since cam follower 28 follows the cam contour of cam 24.
  • the pivoting of the pivot lever element 16 about the pivot axis 38 causes the pivot lever 22 to pivot about the pivot shaft 36, since the roller 48 is in contact with the contact surface 34.
  • the Figure 5 shows exemplary valve lift curves for the gas exchange valves 12, which can be set with the variable valve train 10.
  • different valve lifts valve lift maxima
  • an adjustment of the pivot shaft 36 in the clockwise direction causes the valve lift maxima of the gas exchange valves 12 to increase.
  • an adjustment of the pivot shaft 36 counterclockwise causes the valve lift maxima of the gas exchange valves 12 to decrease. This effect is achieved in that the relative position of the pivot axis 38 with respect to the camshaft 14 and the roller 48 is influenced by adjusting the pivot shaft 36.
  • the contact surface 34 of the pivot lever element 2 is to achieve the in Figure 5 specially designed valve lift curves.
  • The, for example, concave course of the contact surface 34 must be designed so that the valve lift maxima of the valve lift curves can be influenced as desired by adjusting the lever arms 18.
  • the contact surface 34 must, for example, depending on an arrangement and dimensioning of the camshaft 14, of the cam 24, the cam follower 28, the pivot lever element 16, the first lever arm 18, the second lever arm 20, the roller 48, the rocker arm 22, the pivot shaft 36, the pivot axis 38 and the gas exchange valves 12.
  • valve lift curves can also be shifted (along the abscissa in Fig. 5 ) so that the opening and closing times can be varied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (15)

  1. Commande de soupape variable (10) pour un moteur à combustion interne, présentant :
    un arbre à cames (14) avec une came (24) ;
    un levier basculant (22) pour l'actionnement d'au moins une soupape d'échange de gaz (12) du moteur à combustion interne ;
    un élément de levier pivotant (16), en particulier une coulisse de levier pivotant, qui présente une surface d'appui (34) et un suiveur de came (28), la surface d'appui (34) étant en liaison fonctionnelle, en particulier en contact, avec le levier basculant (22) et le suiveur de came (28) suivant un contour de came de la came (24) ; et
    caractérisée par
    un premier bras de levier (18) qui supporte de manière pivotante l'élément de levier pivotant (16) et qui est connecté à un arbre de pivotement entraînable (36) en vue du pivotement autour d'un axe longitudinal (A) de l'arbre de pivotement (36) .
  2. Commande de soupape variable (10) selon la revendication 1, dans laquelle :
    le levier basculant (22) est supporté de manière pivotante autour de l'arbre de pivotement (36) ; et/ou
    l'arbre de pivotement (36) sert d'axe de levier basculant pour le levier basculant (22).
  3. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle une rotation de l'arbre de pivotement (36) provoque un pivotement du premier bras de levier (18) et de l'élément de levier pivotant (16), de telle sorte qu'un transfert du contour de came de la came (24) de l'élément de levier pivotant (16) au levier basculant (22) puisse être modifié, notamment de manière continue.
  4. Commande de soupape variable (10) selon la revendication 3, dans laquelle le transfert peut être modifié pour modifier une course maximale de soupape de l'au moins une soupape d'échange de gaz (12), en particulier jusqu'à une course nulle de l'au moins une soupape d'échange de gaz (12).
  5. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle le premier bras de levier (18) est connecté de manière solidaire en rotation à l'arbre de pivotement (36).
  6. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle :
    l'élément de levier pivotant (16), lorsque le suiveur de came (28) suit le contour de came de la came (24), est pivoté par rapport au premier bras de levier (18) ; et/ou
    un axe de pivotement (38) relie le premier bras de levier (18) et l'élément de levier pivotant (16) l'un à l'autre de manière pivotante.
  7. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle le levier basculant (22) présente un rouleau rotatif (48) pour venir en contact avec la surface d'appui (34).
  8. Commande de soupape variable (10) selon la revendication 7, dans laquelle le suiveur de came (28) de l'élément de levier pivotant (16) et le rouleau rotatif (48) du levier basculant (22) sont réalisés de manière identique.
  9. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle l'arbre de pivotement (36) peut tourner seulement dans une plage angulaire limitée inférieure à 360°, en particulier dans une plage angulaire inférieure à 120°.
  10. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, présentant en outre :
    un deuxième bras de levier (20) qui est connecté au premier bras de levier (18) par le biais de l'arbre de pivotement (36) et notamment par le biais de l'axe de pivotement (38), le premier bras de levier (18) et le deuxième bras de levier (20) étant notamment disposés sur des côtés opposés du levier basculant (22).
  11. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, présentant en outre :
    un manchon (40) qui est disposé de manière solidaire en rotation sur l'arbre de pivotement (36), le premier bras de levier (18) étant disposé de manière solidaire en rotation sur le manchon (40) et le levier basculant (22) étant disposé de manière à pouvoir pivoter autour du manchon (40).
  12. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, dans laquelle l'élément de levier pivotant (16) est disposé entre le levier basculant (22) et l'arbre à cames (14).
  13. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, présentant en outre :
    une unité d'entraînement (42) pour faire tourner l'arbre de pivotement (36) ; ou
    un actionneur (43), qui est réalisé de manière à venir en contact avec le premier bras de levier (18) pour faire pivoter le premier bras de levier (18) .
  14. Commande de soupape variable (10) selon l'une quelconque des revendications précédentes, présentant en outre :
    un déphaseur d'arbre à cames (26), qui est connecté à l'arbre à cames (14) pour régler une phase de l'arbre à cames (14).
  15. Véhicule automobile, en particulier véhicule utilitaire, comprenant une commande de soupape variable (10) selon l'une quelconque des revendications précédentes.
EP18186844.9A 2017-08-24 2018-08-01 Commande de soupape variable Active EP3453850B1 (fr)

Applications Claiming Priority (1)

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DE102017119348.0A DE102017119348A1 (de) 2017-08-24 2017-08-24 Variabler Ventiltrieb

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EP3453850A1 EP3453850A1 (fr) 2019-03-13
EP3453850B1 true EP3453850B1 (fr) 2021-01-20

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US (1) US10619527B2 (fr)
EP (1) EP3453850B1 (fr)
JP (1) JP7351606B2 (fr)
CN (1) CN109424384B (fr)
DE (1) DE102017119348A1 (fr)
RU (1) RU2766953C2 (fr)

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CN109424384A (zh) 2019-03-05
US10619527B2 (en) 2020-04-14
CN109424384B (zh) 2022-02-22
JP7351606B2 (ja) 2023-09-27
RU2018130638A (ru) 2020-02-25
BR102018017052A2 (pt) 2019-09-10
BR102018017052A8 (pt) 2023-02-07
RU2018130638A3 (fr) 2022-01-17
EP3453850A1 (fr) 2019-03-13
US20190063272A1 (en) 2019-02-28
RU2766953C2 (ru) 2022-03-16
DE102017119348A1 (de) 2019-02-28
JP2019039432A (ja) 2019-03-14

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