EP3899215A1 - Dispositif d'actionnement commutable pour une soupape de levage d'un moteur à combustion interne, moteur à combustion interne et véhicule à moteur - Google Patents

Dispositif d'actionnement commutable pour une soupape de levage d'un moteur à combustion interne, moteur à combustion interne et véhicule à moteur

Info

Publication number
EP3899215A1
EP3899215A1 EP19827665.1A EP19827665A EP3899215A1 EP 3899215 A1 EP3899215 A1 EP 3899215A1 EP 19827665 A EP19827665 A EP 19827665A EP 3899215 A1 EP3899215 A1 EP 3899215A1
Authority
EP
European Patent Office
Prior art keywords
rocker arm
locking element
actuating device
internal combustion
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
EP19827665.1A
Other languages
German (de)
English (en)
Other versions
EP3899215B1 (fr
Inventor
Johannes Hollweck
Thorsten Bachmann
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
Original Assignee
MAN Truck and Bus SE
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 MAN Truck and Bus SE filed Critical MAN Truck and Bus SE
Publication of EP3899215A1 publication Critical patent/EP3899215A1/fr
Application granted granted Critical
Publication of EP3899215B1 publication Critical patent/EP3899215B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • 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
    • F01L13/0005—Deactivating 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
    • F01L2001/186—Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/101—Electromagnets
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/105—Hydraulic motors
    • 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
    • F01L2013/10—Auxiliary actuators for variable valve timing
    • F01L2013/106—Pneumatic motors
    • 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

Definitions

  • Switchable actuating device for a lift valve of an internal combustion engine, internal combustion engine and motor vehicle
  • the present invention relates to a switchable actuating device for a lift valve egg ner internal combustion engine.
  • the invention relates to a switchable actuating device for a charge exchange valve of an internal combustion engine, which is periodically movable between a closed and open position indirectly by a cam of a camshaft.
  • the invention also relates to an internal combustion engine and a motor vehicle with such an actuating device.
  • the fuel consumption of the internal combustion engine can be reduced by deactivating the injection of individual cylinders. If the gas exchange in the corresponding cylinders is also deactivated, the fuel consumption can be reduced even further, since then no gas exchange work has to be done. At the same time, by deactivating the gas exchange, cooling of the exhaust gas aftertreatment system, in particular in low-load operation, is reduced.
  • the invention has for its object to provide a (down) switchable actuating device for a lift valve of an internal combustion engine, which with few loads, ie. H. especially not burdened by moments, construction parts can be realized.
  • the switchable actuation device for a lift valve of an internal combustion engine comprises a two-part rocker arm for actuating the lift valve.
  • This has a first rocker arm part pivotably mounted about a rocker arm axis, to which a, preferably hollow cylindrical, bearing sleeve is fastened concentrically to the rocker arm axis.
  • the two-part rocker arm comprises a second rocker arm part pivotably mounted on the bearing sleeve.
  • the bearing sleeve fastened with the first rocker arm part can thus serve as a sliding bearing for the second rocker arm part.
  • both the first and the second rocker arm part each have a recess, preferably in the form of a groove extending parallel to the rocker arm axis.
  • the recess in the first rocker arm part is referred to below as the “first” recess and the recess in the second rocker arm part as the “second” recess.
  • the switchable actuation device also has a coupling device for the detachable, rotationally fixed connection of the first and second rocker arms.
  • the coupling device comprises a locking element - for. B. in the form of an insert - which can be brought into and out of engagement with the first and second recesses.
  • the engagement between the locking element and the first or second recess is preferably a tongue and groove engagement and / or a positive and / or non-positive engagement.
  • An actuation of the lift valve preferably a change between a closed and open position of the lift valve, is interrupted if the locking element is not in engagement with the first or second recess.
  • the two-part rocker arm can, on the one hand, be in a coupled state, in which the two rocker arm parts are connected in a rotationally fixed manner and act like a single two-sided overall rocker arm, in order to enable a gas change at the lift valve.
  • the two-part rocker arm can be present in a decoupled state, in which the two rocker arm parts can be pivoted independently of one another and how two separate one-sided levers work, in order to interrupt a gas change at the lift valve. The change from the coupled to the uncoupled state and vice versa takes place through the movement of the locking element.
  • this provides a (switchable) actuating device for a lift valve, in which the type of coupling and the mounting according to the invention result in the rocker arm guide being less loaded and therefore less wear-resistant, in which the occurrence of moments on the bearing and the Components can largely be avoided as far as possible.
  • the stroke valve of the internal combustion engine is a charge exchange valve which can be moved periodically between a closed and open position indirectly by a cam of a camshaft.
  • the first rocker arm part can be operatively connected to a cam of the camshaft via a roller rotatably mounted on the first rocker arm part and the second rocker arm part can be coupled in terms of motion with the lift valve or load change valve.
  • This assignment of the first or second rocker arm part to a cam or a valve can, however, also follow the other way around.
  • first rocker arm part pivoted about the rocker arm axis can be both a cam lever and a valve lever, in which case the second rocker arm part pivotably mounted on the bearing sleeve is accordingly corresponding to the other lever form (valve or Cam lever) should be trained.
  • the bearing sleeve can be integrally formed on the first tilt lever part.
  • the bearing sleeve and the first rocker arm part are formed in one piece. This can advantageously facilitate the manufacture and assembly.
  • the bearing sleeve can also surround the rocker arm axis in a central manner. Or. in other words, the bearing sleeve can completely enclose the rocker arm axis around the catch side.
  • the bearing sleeve is particularly preferably designed as a hollow cylinder, the inner radius of which essentially corresponds to the outer radius of the rocker arm salmon.
  • the first rocker arm part and the bearing sleeve can also be arranged on a common plain bearing bush around the rocker arm axis.
  • the bearing sleeve can also comprise a groove, preferably a circumferential one, that is to say perpendicular to the rocker arm axis. A securing ring for axially securing the position of the second rocker arm part can then be inserted into this.
  • the locking element can be brought into a release position S e or into a locking position S a by moving perpendicular to the rocker arm axis, preferably by essentially radial movement.
  • the coupling device can be designed to move the locking element perpendicular to the rocker arm axis for releasably non-rotatably connecting the first and second rocker arm parts in order to bring the locking element either into a release position S e or into a locking position S a .
  • the locking element should not be in engagement with the first and second recesses in the release position S e . While the locking element in the animal position S a should be in engagement with the first and second recesses.
  • the expression “being in engagement” can generally refer to an intermeshing of the components and / or an insertion of the locking element in the first and second recesses.
  • a non-positive and / or positive connection is formed between the locking element and the first recess, as well as the locking element and the second recess.
  • the locking element is particularly preferably non-positively connected to the first and second recesses in the radial and axial directions and positively in the circumferential direction. In this case and in the entire document, such directions (radial, axial, circumferential) should be understood in relation to the rocker arm axis. So z.
  • the expression “in the circumferential direction” can be interpreted as a short form for "in the circumferential direction to the rocker arm axis” or “in the circumferential direction in relation to the rocker arm axis”. Characterized in that a locking or releasing the locking by moving the locking element perpendicular to the rocker arm axis he follows, loads on the bearings and components can be avoided in an advantageous manner, since this involves forces but no moments on the bearings and components occur.
  • the first and second recesses can each extend as a groove extending parallel to the rocker arm axis with a groove cross section tapering to the rocker arm axis, e.g. B. in the form of a trapezoidal groove.
  • the expression “groove cross section” is intended to mean a section through the first or second recess perpendicular to the rocker arm axis.
  • a circumferential extension of the groove lying radially on the outside with respect to the rocker arm axis can be larger than a circumferential extension of the groove lying radially further inside.
  • the locking element can be wedge-shaped and / or wedge-shaped and / or at least partially complementary in shape first and / or second recess.
  • the contact surfaces between the locking element and the first and second recesses run parallel to the rocker arm axis.
  • a positive connection between the locking element and the first and / or second recess can be achieved in the circumferential direction, whereby a stable locking of the two rocker arm parts is made possible.
  • the insertion or insertion of the locking element into the first and second recess can thereby be facilitated.
  • each of the groove cross sections can also be designed to self-lockingly clamp the locking element in the circumferential direction when the locking element engages in the first and second recesses.
  • the seat of the Arretierele element in the first and second recess can be designed to prevent unwanted independent loosening of the connection between the locking element and the first and second recess ge compared movements in the circumferential direction.
  • the person skilled in the art can determine the specific design of the groove cross section in which such a self-locking bracing of the locking element occurs through simple test series with different groove cross sections. The operating safety of the actuating device can be increased overall by the self-locking in an advantageous manner.
  • each of the groove cross-sections to the rocker arm salmon ie in the direction of the rocker arm axis, can be bounded by a groove base and by two groove flanks to the side.
  • an angle of inclination a of the groove flanks can be smaller than the self-locking angle on the material pairing of the first rocker arm part locking element and / or that smaller than the self-locking angle on the material pairing of the second rocker arm part locking element.
  • the angle of inclination a is intended to denote the angular deviation of the groove flanks from an ideal rectangular cross section (cf. also FIG. 5).
  • both groove flanks can also have the same or different inclination angles a.
  • the material-pair-dependent determination of the self-locking angle au can be carried out via the arctangent of the static friction coefficient m between the two components (ci h ⁇ 2-arctan (p)) or experimentally.
  • the angle of inclination of the groove flanks should therefore be less than 11.4 °.
  • fixation of the locking element in the circumferential direction can be achieved in a simple manner.
  • the locking element can have the greatest expansion along the rocker arm axis. In other words, the locking element can thus have a greater length in the axial direction than in the radial direction or circumferential direction.
  • the locking element can - particularly preferably - have the same length in the axial direction as the first and second recesses.
  • the locking element can also extend, preferably essentially, parallel to the rocker arm axis.
  • the locking element can be made in the form of a rod and / or bar.
  • the locking element in order to bring it selectively into and out of engagement with the first and second recesses, can only be movable in the radial direction. This enables reliable and simple coupling or decoupling of the two rocker arm parts in an advantageous manner.
  • the coupling device can also comprise a bearing block for axially fixing the locking element.
  • the bearing block can have two bearing cheeks spaced apart in the axial direction, on which the locking element can be pivotably mounted by means of two pins fastened to the locking element.
  • the bearing cheeks preferably include bushings, particularly preferably bushings with elongated holes, for receiving the pins.
  • Advantageously, can be achieved by a reliable position tion of the locking element.
  • the pins of the locking element can each be guided in a circumferentially extending slot of the bearing cheeks of the bearing block.
  • the bearing cheeks can each comprise bushings with elongated holes extending in the circumferential direction, in which the pins of the locking elements are movably mounted.
  • the bearing block can also comprise a guide roller rotatably mounted in the axial direction, which can be supported on the locking element in the radial direction for the radial fixing of the locking element.
  • the rotatably mounted guide roller can preferably roll on an outer surface of the locking element.
  • the coupling device can also comprise at least one sliding pin arranged on the rocker arm axis, on which the bearing block is mounted so as to be displaceable radially to the rocker arm axis.
  • the coupling device can also comprise at least one slide rail arranged on the rocker arm axis, on which the bearing block is slidably mounted radially to the rocker arm axis.
  • the coupling device can additionally or alternatively also comprise at least one slide pin arranged on a cylinder head or on a projection and / or a bracket of the cylinder head and / or on which the bearing block is displaceably mounted radially to the rocker arm axis.
  • the slide pin can also be designed as a slide rail.
  • the coupling device can further comprise a clamping device, by means of which the bearing block can be clamped in the radial direction against the first and second recesses.
  • the tensioning device can comprise one or more spring elements (e.g. coil springs).
  • the clamping device can also be designed to salmon the bracket and thus the locking element stronger against the rocker arm and thus against the first and second recess, if the locking element does not lie or engage in the first and second recesses than when the locking element lies or engages in the first and second recesses.
  • the clamping device can be formed, the clamping force on the bearing block and / or the locking element in dependence on the radial distance thereof to adjust the rocker arm axis.
  • this enables secure radial fi xation of the locking element.
  • the actuating device can comprise a switching device by means of which the locking element can be actuated in order to selectively engage and disengage it with the first and bring second recess.
  • the switching device can be designed to bring the locking element for non-rotatably connecting the first and second rocker arm parts into engagement with the first and second recesses and for releasing the rotationally fixed connection of the first and second rocker arm parts, the locking element out of engagement with the first and second recesses bring to.
  • This switching device can be an electromagnetic and / or a pneumatic and / or a hydraulic switching device.
  • the switching device may comprise a permanent magnet material fastened to the bearing block and an electromagnet arranged adjacent to it, the permanent magnetic material interacting magnetically with the electromagnet for switching the locking element with the electromagnet.
  • the switching device can also comprise a piston-cylinder arrangement attached to the bearing block, the cylinder being acted upon by a hydraulic medium for switching the locking element.
  • the switching device is preferably designed such that the locking element is in engagement with the first and second recesses in a deactivated state of the switching device and is out of engagement with the first and second recesses in an activated state of the switching device. In this way, the reliability can be increased in an advantageous manner, since in the event of a fault in the switching device, operation of the lift valve is still possible (fail-safe).
  • an internal combustion engine preferably a diesel internal combustion engine
  • the internal combustion engine comprises a globe valve with a switchable actuating device as described in this document.
  • the internal combustion engine can also have multiple, i.e. H. comprise at least two, lift valves, each with a corresponding switchable actuating device.
  • an internal combustion engine is thus provided overall, in which - preferably in low-load operation - the gas exchange of individual globe valves is deactivated in a targeted manner who can.
  • the invention also relates to a motor vehicle, comprising an aforementioned internal combustion engine, ie an internal combustion engine having a lift valve with a switchable Actuator as described in this document.
  • the motor vehicle is preferably a commercial vehicle.
  • the motor vehicle can be a motor vehicle that is designed for its construction and device for the conveyance of people, for the transport of goods or for pulling trailer vehicles.
  • the motor vehicle may be a truck, a bus and or a tractor-trailer.
  • the internal combustion engine according to the invention can also be used in other types of vehicles, so that protection is also claimed for other types of vehicles which comprise such an internal combustion engine with a switchable actuating device for a lift valve.
  • a rail vehicle preferably a traction vehicle
  • an aircraft preferably an aircraft
  • a ship are accordingly provided according to the invention.
  • the features disclosed in connection with the motor vehicle should thus also be disclosed for the rail vehicle and the aircraft, and thus in particular can be claimed independently of the motor vehicle.
  • Figure 1 is a schematic representation of a switchable actuator for a
  • Figure 2 is a schematic exploded view of a two-part rocker arm of the switchable actuating device according to an embodiment of the invention
  • Figure 3 is a schematic exploded view of a coupling device of the switchable actuating device according to an embodiment of the invention.
  • Figure 4 is a schematic side view of the switchable actuator according to
  • Figure 5 is an enlarged detail view of Figure 4 to illustrate the angle of inclination of the groove flanks.
  • Figure 6 a motor vehicle comprising an internal combustion engine with a switchable actuation device according to an embodiment of the invention.
  • FIG. 1 shows a schematic illustration of a switchable actuation device 100 for a lift valve of an internal combustion engine 20 according to an embodiment of the invention.
  • the actuating device 100 in this case comprises a two-part rocker arm 10 for actuating the lift valve (not shown in more detail).
  • the two-part rocker arm 10 has a pivotable about a rocker arm axis 2, i. H. Rotatable first rocker arm part 1 a over a certain angular range about the rocker arm axis 2.
  • a, preferably hollow cylindrical, bearing sleeve 1a1 is fixed concentrically to the rocker arm axis 2, on which in turn a second rocker arm part 1 b is pivotally mounted.
  • the bearing sleeve 1a1 is not visible (see FIG. 2 in this regard), so that here the two rocker arm parts 1a and 1b appear to be mounted adjacent to the rocker arm axis 2.
  • the term “concentric” can also mean “coaxial” in this context. Concentrically, however, it is not the same meaning that the bearing sleeve 1a1 also necessarily completely surrounds the rocker arm axis 2, but this is possible.
  • the first rocker arm part 1a can - as shown - be in operative connection with a cam 11 of the camshaft 12 via a roller 1a3 which is rotatably mounted on the first rocker arm part 1a.
  • the first rocker arm part 1 a can be moved by a periodic movement of the cam 11 when the camshaft 12 rotates, in particular in a pivoting movement about the rocker arm axis 2. This movement of the first rocker arm part 1a can then be transmitted to a second rocker arm part 1b or not by means of a coupling device 4 - described in more detail below.
  • the coupling device 4 is set up to connect the two rocker arm parts 1 a, 1 b to one another in a detachable, non-rotatable manner.
  • the first and second rocker arm parts 1 a and 1 b can be coupled in terms of movement technology by means of the coupling device 4.
  • the second rocker arm part 1 b can be in operative connection with the lift valve, preferably with a charge exchange valve, so that in the coupled state of the two rocker arm parts 1a, 1b, the lift valve can be moved periodically between a closed and open position by means of a cam 11 of the camshaft 12.
  • the aforementioned assignment of the first and second rocker arm parts 1 a, 1 b to a cam 11 or a valve can also be carried out in reverse.
  • the rocker arm axis 2 is not designed as a continuous cylinder in the present case, but instead has flattened regions 2a which are used for fastening a coupling device 4 for releasably non-rotatably connecting the first and second rocker arm parts 1a, 1b.
  • the coupling device 4 is designed as a bearing block 4b guided on two sliding pins 4d1, 4d2, which is clamped against the first and second rocker arm parts 1a, 1b by means of a tensioning device 4e - in the form of two spiral springs 4e1, 4e2.
  • the coupling device 4 is arranged in the direction of gravity above the rocker arm axis 2.
  • FIG. 2 shows a schematic exploded view of a two-part rocker arm 10 of the switchable actuating device 100 according to an embodiment of the invention.
  • the two-part rocker arm 10 has a first rocker arm part 1a and a second rocker arm part 1b.
  • the two rocker arm parts 1 a and 1 b can each be designed as a one-sided lever, d. That is, one end area can be formed for the pivotable mounting of the lever and another end area for power transmission.
  • an existing hollow cylindrical bearing sleeve 1a1 is attached to the first rocker arm part 1a. If the bearing sleeve 1 a1 and the first rocker arm part 1a are formed in several parts, the fastenings, i.
  • the bearing sleeve 1a1 and first rocker arm part 1a can also be formed in one piece, for. B. by the bearing sleeve 1 a1 is integrally formed on the first rocker arm part 1a.
  • the second rocker arm part 1 b is pivotally mounted on the hollow cylindrical bearing sleeve 1 a1.
  • the bearing sleeve 1 a1 fastened with the first rocker arm part 1a can thus serve as a sliding bearing for the second rocker arm part 1b.
  • the bearing sleeve 1a1 further include a groove 1 a2 running circumferentially, ie perpendicular to the rocker arm axis 2.
  • the two-part rocker arm 10 can further comprise a, preferably hollow cylindrical, slide bearing bush 7, by means of which the first rocker arm part 1 a and / or the bearing bush 1 a1 are / are mounted on the rocker arm axis 2.
  • the plain bearing bush 7 is preferably designed to concentrically surround the rocker arm axis 2 or to completely surround it on the circumferential side.
  • the first rocker arm part 1a and / or the bearing bushing 1a1 can also be mounted directly on the rocker arm axis 2, in which case a sliding layer, for. B. M0S2, is applied to the rocker arm axis 2.
  • the first rocker arm part 1 a comprises a first recess 3a and the second rocker arm part 1 b has a second external effect 3 b.
  • these are designed in the form of a groove with a trapezoidal cross section, each extending parallel to the tilt axis 2.
  • the recesses 3a and 3b are arranged and dimensioned in such a way that they can complement each other to form an overall groove, into which, for locking or coupling the two tilting lever parts 1a and 1b, a - which is described in more detail below and preferably has a complementary shape - Locking element 4a can engage or can be used.
  • FIG. 3 shows a schematic exploded illustration of a coupling device 4 of the switchable actuating device 100 including a locking element 4a, in the present case designed as an insert, according to an embodiment of the invention.
  • the Arretie relement 4a which has its greatest extent along the rocker arm axis 2, is complementary to the first and second recesses 3a, 3b (see FIG. 2).
  • the locking element 4a can cooperate as optimally as possible with the first and second recesses 3a, 3b in the form of a tongue and groove engagement in order to releasably connect the two rocker arm parts 1a and 1b in a rotationally fixed manner.
  • the bearing block 4b is made portal-shaped and comprises two bearing cheeks 4b1, 4b2 spaced in the axial direction, each of which has elongated holes 4b3 (only one shown) extending in the circumferential direction, in which the locking element 4a is guided by means of the pins 4a1, 4a2.
  • the bearing block 4b further comprises a guide roller 4c which is rotatably mounted in the axial direction and which is supported on the locking element 4a.
  • the rotatably mounted guide roller 4c can roll on an outer surface of the locking element 4a, as a result of which optimal radial force transmission for securing the locking element 4a can be achieved at any time or for any pivoting state.
  • the present embodiment of the bearing block 4b comprises two guide eyes 4f1 and 4f2, by means of which the bearing block 4b, preferably for movement in the radial direction, is guided on two sliding pins 4d1 and 4d2 (cf. FIG. 1). It is particularly advantageous if the coupling device 4 further comprises a clamping device by means of which the bearing block 4b can be clamped in the radial direction against the first and second recesses 3a, 3b. As shown in FIG.
  • FIG. 4 shows a schematic side view of the switchable actuating device 100 according to FIG. 1 in a locking position S a (top) and a release position S e (bottom).
  • the locking element 4a is almost completely constantly in the first and second recesses 3a, 3b, whereby the first and second rocker arm parts 1 a and 1 b are coupled in terms of movement.
  • the locking element 4a is not in contact with the first and / or second recess 3a, 3b, as a result of which the first and second rocker arm parts 1a, 1b are movable independently of one another.
  • the change between these two positions takes place by moving the locking element 4a in a plane perpendicular to the rocker arm axis 2, preferably by moving the locking element 4a radially.
  • the bearing block 4b guided on sliding pins 4d1, 4d2 can be raised or lowered radially to the rocker arm axis 2 by means of the switching device 13.
  • the switching device 13 is in the form of an electromagnet, which interacts magnetically with a permanent magnet material attached to the bearing block 4b.
  • the switching device 13 can also comprise a piston-cylinder arrangement attached to the bearing block 4b, the cylinder being acted upon by a hydraulic medium and / or compressed air for switching the locking element 4a.
  • Figure 5 shows an enlarged detail view of the area of the first recess 3a of the release position S e of Figure 4.
  • the first and second recesses 3a, 3b are each formed as a tra peznut extending parallel to the rocker arm axis 2.
  • the first and second recesses 3a, 3b each have a groove cross section that tapers to the rocker arm axis 2. This is bounded to the rocker arm axis 2 by a groove base and laterally by two groove flanks, each of which is inclined by an inclination angle ⁇ in comparison to an ideal rectangular cross section.
  • FIG. 6 shows a motor vehicle 30 comprising an internal combustion engine 20 with a switchable actuating device 100 for a lift valve according to an embodiment of the invention.
  • the motor vehicle 30 is a commercial vehicle in the form of a truck.
  • the motor vehicle 30 can also be an omnibus and / or a tractor-trailer.
  • a gas change of individual lift valves of the internal combustion engine 20 - preferably in low-load operation - can be specifically deactivated and the overall fuel consumption thereby reduced.

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

Abstract

La présente invention concerne un dispositif d'actionnement commutable (100) pour une soupape d'échange de gaz. Le dispositif d'actionnement commutable (100) comprend un culbuteur en deux parties (10). Ledit culbuteur présente une première partie de culbuteur (1a) montée pivotante autour d'un axe de culbuteur (2), un coussinet de palier (1a1) étant disposé de façon concentrique par rapport à l'axe de culbuteur (2), ainsi qu'une seconde partie de culbuteur (1b) montée pivotante sur le coussinet de palier (1a1). Par ailleurs, les première et seconde parties de culbuteur (1a, 1b) comprennent chacune un évidement (3a, 3b), un élément de blocage (4a) d'un moyen de couplage (4) du dispositif d'actionnement commutable (100) pouvant venir en prise avec les deux évidements (3a, 3b) et se dégager de ceux-ci. L'actionnement de la soupape de levage, de préférence le passage d'une position de fermeture à une position d'ouverture de la soupape de levage, est interrompu au cas où l'élément de blocage (4a) n'est pas en prise avec les deux évidements (3a, 3b). L'invention concerne également un moteur à combustion interne (20) ainsi qu'un véhicule à moteur (30).
EP19827665.1A 2018-12-19 2019-12-12 Dispositif d'actionnement commutable pour une soupape de levage d'un moteur à combustion interne, moteur à combustion interne et véhicule à moteur Active EP3899215B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018132857.5A DE102018132857A1 (de) 2018-12-19 2018-12-19 Schaltbare Betätigungsvorrichtung für ein Hubventil einer Brennkraftmaschine, Brennkraftmaschine und Kraftfahrzeug
PCT/EP2019/084778 WO2020126775A1 (fr) 2018-12-19 2019-12-12 Dispositif d'actionnement commutable pour une soupape de levage d'un moteur à combustion interne, moteur à combustion interne et véhicule à moteur

Publications (2)

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EP3899215A1 true EP3899215A1 (fr) 2021-10-27
EP3899215B1 EP3899215B1 (fr) 2022-12-07

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US (1) US11371396B2 (fr)
EP (1) EP3899215B1 (fr)
CN (1) CN113015846B (fr)
BR (1) BR112021006313A2 (fr)
DE (1) DE102018132857A1 (fr)
WO (1) WO2020126775A1 (fr)

Families Citing this family (7)

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WO2021143995A1 (fr) * 2020-01-17 2021-07-22 Eaton Intelligent Power Limited Systèmes de verrou électromagnétique pour ensembles culbuteurs
US20230235685A1 (en) * 2020-05-29 2023-07-27 Eaton Intelligent Power Limited Rocker arms
EP4222357A1 (fr) * 2020-09-30 2023-08-09 Streparava S.p.A. Con Socio Unico Culbuteur commutable pour commande de levée d'un pontet ou d'une soupape unique d'un groupe de distribution à soupapes d'un moteur à combustion interne et groupe de distribution à soupapes comprenant au moins un tel culbuteur commutable
DE102020126356A1 (de) 2020-10-08 2022-04-14 Schaeffler Technologies AG & Co. KG Trägermodul für einen schaltbaren Ventiltrieb einer Schwerlast-Brennkraftmaschine
DE102021101222A1 (de) 2021-01-21 2022-07-21 Schaeffler Technologies AG & Co. KG Baueinheit für einen schaltbaren Ventiltrieb einer Schwerlastbrennkraftmaschine
DE102021126256A1 (de) 2021-10-11 2023-04-13 Schaeffler Technologies AG & Co. KG Trägermodul für einen schaltbaren Ventiltrieb einer Schwerlastbrennkraftmaschine
CN118369492A (zh) * 2021-12-09 2024-07-19 伊顿智能动力有限公司 用于可切换式摇臂的闩锁系统

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Publication number Publication date
EP3899215B1 (fr) 2022-12-07
US11371396B2 (en) 2022-06-28
US20220074321A1 (en) 2022-03-10
CN113015846A (zh) 2021-06-22
DE102018132857A1 (de) 2020-06-25
CN113015846B (zh) 2023-07-04
WO2020126775A1 (fr) 2020-06-25
BR112021006313A2 (pt) 2021-07-06

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