EP2766582A1 - Commande de soupapes pour moteur à combustion interne - Google Patents

Commande de soupapes pour moteur à combustion interne

Info

Publication number
EP2766582A1
EP2766582A1 EP12766882.0A EP12766882A EP2766582A1 EP 2766582 A1 EP2766582 A1 EP 2766582A1 EP 12766882 A EP12766882 A EP 12766882A EP 2766582 A1 EP2766582 A1 EP 2766582A1
Authority
EP
European Patent Office
Prior art keywords
actuator
camshaft
outer shaft
phase angle
adjustment
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.)
Ceased
Application number
EP12766882.0A
Other languages
German (de)
English (en)
Inventor
Axel Groenendijk
Martijn VAN DER HEIJDEN
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP2766582A1 publication Critical patent/EP2766582A1/fr
Ceased legal-status Critical Current

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
    • F01L1/02—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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34413—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using composite camshafts, e.g. with cams being able to move relative to the camshaft
    • 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
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L2001/34486—Location and number of the means for changing the angular relationship
    • F01L2001/34489—Two phasers on one camshaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0242—Variable control of the exhaust valves only
    • F02D13/0249—Variable control of the exhaust valves only changing the valve timing only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0261—Controlling the valve overlap

Definitions

  • the invention relates to a valve train for an internal combustion engine having at least two camshafts and a phaser, wherein the phaser a drive wheel, a first actuator which is rotatably connected to a first of the camshaft, and a second actuator which is rotatably connected to a second of the camshaft , wherein by adjusting the first and / or the second actuator, a phase angle with respect to the drive wheel can be adjusted.
  • the valve train for a piston internal combustion engine comprises at least one, regularly two intake and exhaust valves for each cylinder of the internal combustion engine. These intake and exhaust valves are controlled by camshafts, with two engines per cylinder usually operating at more than two valves
  • Camshafts are used. In many cases, the arrangement of these camshafts is such that one of them all inlet valves and the other all
  • valve timing of the intake and exhaust valves should be independently controllable.
  • This is achieved for mixed camshafts by that these are in the form of double camshafts, so-called cam-in-cam camshafts, are formed. These consist of an outer shaft and an inner shaft mounted inside the outer shaft, wherein both the inner and the outer shaft are provided with cams for the control of the intake and exhaust valves.
  • the cams of the inner shaft protrude through openings in the outer shaft.
  • phase divider is known, for example, from US Pat. No. 7,841,31,2 B2.
  • This includes a drive wheel, which is driven by any drive means (gear, timing belt, timing chain) rotating from a crankshaft of an internal combustion engine.
  • the rotation of the drive wheel is transmitted via two impellers to a double camshaft, wherein one of the impellers acts on the inner shaft and the other impeller on the outer shaft of the camshaft.
  • the impellers are within limits rotatable within a likewise driven by the drive wheel housing, whereby a phase adjustment of the associated with the impellers inner shaft and
  • Outer shaft opposite the drive wheel can be achieved.
  • the adjustment of the two impellers within the housing is hydraulic and independent of each other, i. the phase position of a wave has no effect on the
  • Phase divider it is thus possible to control the phase adjustment of inner and outer shaft of a double camshaft completely independently.
  • phase divider A disadvantage of this phase divider is the high design complexity and the high control engineering effort for the independent phase adjustment of the two waves.
  • the invention was the object of an improved generic valve train for an internal combustion engine
  • phase divider comprises a drive wheel, a first actuator which is non-rotatably connected to a first of the camshaft, and a second actuator which is non-rotatably connected to a second of the camshaft, wherein an adjustment of the first and / or the second actuator, a phase angle with respect to the drive wheel can be adjusted by the fact that the adjustment of the second actuator takes place in dependence on the adjustment of the first actuator.
  • the first and second actuators are coupled or connected to one another directly or indirectly via a coupling element, in particular mechanically or electrically.
  • This approach is based on the idea that it is not regularly necessary for an operation of an engine provided with such a valvetrain to be able to control the valves completely independently of each other and that by dispensing with this possibility of independent control not only the design effort for Phase controller can be reduced, but also the control effort is significantly lower, whereby the computational effort for the intended purpose for this purpose control device can be kept low.
  • phase adjuster is hydraulically actuated.
  • a rotation of the individual camshaft can then take place, for example, by one or two pressure chambers which (each) from one side of a
  • pivotable, associated with the respective camshaft actuator are limited to be filled or emptied with the hydraulic fluid: In two, separate from the actuator pressure chambers, can by an alternativerdes
  • Hydraulic fluid whereby the required accuracy for the adjustment can be achieved in a relatively simple manner.
  • Dependence of the adjustment of the second actuator on an adjustment of the first actuator can be achieved in the case of a hydraulic (or pneumatic) phase divider in that it comprises at least one valve which is closed or opened as a function of a position of the first actuator and thereby the
  • the valve can be designed in particular as a simple opening, which is connected in dependence on the position of a movable (in particular pivotable) actuating element of the first actuator with a hydraulic fluid (or compressed air) filled pressure chamber or separated from it.
  • Control effort may be further provided that the adjustment of the second actuator only digital, i. between two adjustment positions, takes place.
  • phase angle direction is preferably such that a small phase angle early control times and a large phase angle late control times of the valves controlled by the corresponding camshaft
  • the first and the second camshaft in the form of an outer shaft and an inner shaft disposed within the outer shaft is formed.
  • the two camshaft thus form a double camshaft, wherein the phaser causes a dependent, but not necessarily rectified and equal adjustment of the inner and outer shaft of the double camshaft.
  • the phase divider of the valve train according to the invention is thus also advantageous for so-called mixed (double) camshaft suitable in which the inner shaft controls one type of valves (intake or exhaust valves) and the outer shaft, the other type of valves.
  • at least one inlet valve is associated with the first camshaft and at least one outlet valve is associated with the second camshaft.
  • a preferred concrete control of the intake and exhaust valves of such a valve train according to the invention with a mixed (double) camshaft can provide that the first actuator has a Designverstell Siemens Scheme for the phase angle of 0 ° to about 50 °, wherein a position of the first actuator in a small phase angle, in particular in a range between 0 ° and 10 °, leads to a position of the second actuator with a large phase angle.
  • "early" timing for the intake valves is combined with “late” timing for the exhaust valves of the engine.
  • These control times may be provided in particular at an operation of the internal combustion engine (near) at full load and low speeds in order to exploit a maximum expansion work in the cylinders. This allows the specific fuel consumption of the
  • the second actuator With a position of the first actuator in a middle phase angle, in particular in a range between approximately 10 ° and approximately 25 °, it may then be preferable to arrange for the second actuator to be adjusted towards a small phase angle. This can be provided in particular during operation of the internal combustion engine (near) at full load and at high rotational speeds. The "early" control times for the exhaust valves controlled by the second camshaft then ensure a sufficient change of charge in the combustion chambers of the internal combustion engine.
  • the second actuator is (again) adjusted to a large phase angle. This can be provided in particular during operation of the internal combustion engine in partial load, in order to achieve a so-called "Miller cycle" for a better utilization of the expansion work.
  • Exhaust valves provided external shaft is connected to the second actuator.
  • valve train according to the invention is provided to combine the phase divider of the valve train according to the invention with two double camshafts, i. both the first and the second camshaft are in the form of an outer shaft and an inner shaft disposed within the outer shaft, wherein the first actuator is connected to the inner or outer shaft of a camshaft and the second actuator to the inner or outer shaft of the second camshaft ,
  • first actuator is connected to the inner or outer shaft of a camshaft and the second actuator to the inner or outer shaft of the second camshaft
  • Phase angle of the first actuator which is preferably connected to the camshaft, which are associated with the intake valves (ie at "late” timing for the intake valves), a small phase angle of the second actuator is realized (ie, "early” timing for the exhaust valves).
  • valve train with two camshafts which are not double and / or not mixed form.
  • FIG. 1 shows a schematic representation of an embodiment of a
  • Fig. 1 shows a schematic representation of the essential components of an embodiment of a valve train according to the invention.
  • This includes one Camshaft 10, which is in the form of a double, mixed camshaft.
  • the camshaft comprises an outer shaft 12 with a plurality of distributed over the length arranged cam 14, which is used to control the exhaust valves of a
  • an inner shaft 16 is rotatably mounted within the outer shaft 12. Also on the outside of the inner shaft 16 a plurality of distributed over the length of the cam 18 are arranged, which serve to control intake valves of the internal combustion engine.
  • the camshaft 10 With its one end, the camshaft 10 is connected to a phase splitter 20.
  • the phase adjuster comprises two actuators, of which a first with the inner shaft 16 and a second with the outer shaft 12 of the camshaft 10 is rotatably connected.
  • the actuators have rotors 22 with adjusting wings (four in the present case in each case), which form pressure chambers with walls of a housing 24 of the phaser.
  • the size of the pressure chambers is variable by a rotation of the respective rotor 22. This rotation is realized by all or individual, the respective rotors 22 associated pressure chambers with a hydraulic fluid (under a defined pressure) to be filled.
  • the phase divider can be formed according to the known from US 7,841, 31 1 B2 phase divider.
  • phase angle is adjusted with respect to a housing connected to the drive wheel 26, which is driven in rotation by a crankshaft, not shown, of the internal combustion engine.
  • This phase angle is transmitted through the non-rotatable connection of the rotors 22 with the respective inner 16 and outer shaft 12 to the respective cams, whereby the timing of the controlled by the cam inlet and outlet valves is changed.
  • valve openings and overflow lines 28 (shown schematically by an arrow) are provided.
  • individual ones of the valve openings are released and thereby individual ones of the pressure chambers formed by the first rotor 22 and the housing 24 are connected to individual ones of the overflow lines.
  • hydraulic fluid which is present in the pressure chambers of the first actuator, can flow into the released pressure chambers of the second actuator and adjust it accordingly.
  • the first actuator has an adjustment range from 0 ° to approximately 50 °. In this case, the phase angle increases in the direction of rotation of the first actuator, so that an increasing
  • the rotor of the first actuator is in a range between 0 ° and 10 °, which can be regarded as "early" timing of the controlled by the cams of the inner shaft intake valves
  • the pressure chambers of the second actuator are filled via correspondingly enabled overflow lines 28, which rotate the rotor of the second actuator (up to a defined stop) in the direction of the general direction of rotation and consequently towards a phase angle defined as large. Accordingly, the timing of the exhaust valves controlled by the cams 14 of the outer shaft 12 are changed to "late.”
  • These phase angles of the two actuators are designed to operate the engine (near) at full load and low speeds to take advantage of maximum expansion work in the cylinders. This allows the specific fuel consumption of the

Landscapes

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

Abstract

L'invention concerne une commande de soupapes pour un moteur à combustion interne comprenant au moins deux arbres à cames et un déphaseur (20). Le déphaseur (20) comprend une roue menante (26), un premier actionneur relié à un premier arbre à cames et un deuxième actionneur relié au deuxième arbre à cames. Le déplacement du premier et/ou du deuxième actionneur permet d'ajuster un angle de phase de l'arbre à cames concerné par rapport à la roue menante (26). La commande est caractérisée en ce que le réglage du deuxième actionneur se fait en fonction de celui du premier actionneur.
EP12766882.0A 2011-10-15 2012-09-13 Commande de soupapes pour moteur à combustion interne Ceased EP2766582A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011116130A DE102011116130A1 (de) 2011-10-15 2011-10-15 Ventiltrieb für eine Brennkraftmaschine
PCT/EP2012/003838 WO2013053421A1 (fr) 2011-10-15 2012-09-13 Commande de soupapes pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP2766582A1 true EP2766582A1 (fr) 2014-08-20

Family

ID=46968127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12766882.0A Ceased EP2766582A1 (fr) 2011-10-15 2012-09-13 Commande de soupapes pour moteur à combustion interne

Country Status (4)

Country Link
EP (1) EP2766582A1 (fr)
CN (1) CN103857882B (fr)
DE (1) DE102011116130A1 (fr)
WO (1) WO2013053421A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014116191C5 (de) * 2014-11-06 2018-11-15 Thyssenkrupp Presta Teccenter Ag Ventiltrieb zur Betätigung von Gaswechselventilen einer Brennkraftmaschine
DE102015214725A1 (de) * 2015-08-03 2017-02-09 Volkswagen Aktiengesellschaft Verbrennungsmotor und Verfahren zur Montage eines Verbrennungsmotors
EP3141711A1 (fr) * 2015-09-11 2017-03-15 Mechadyne International Limited Déphaseur d'arbre à cames double
DE102017103718A1 (de) 2017-02-23 2018-08-23 Volkswagen Aktiengesellschaft Phasensteller für eine Nockenwellen einer Brennkraftmaschine
DE102017206645A1 (de) * 2017-04-20 2018-10-25 Robert Bosch Gmbh Tankentlüftungsvorrichtung
GB201717280D0 (en) 2017-10-20 2017-12-06 Eaton Srl Actuation Arrangement for a valve train Assembly
DE102018111994B4 (de) 2018-05-18 2023-09-21 Schaeffler Technologies AG & Co. KG Nockenwellenverstellsystem mit hydraulischem Nockenwellversteller und elektrischem Nockenwellenversteller
DE102018111996A1 (de) 2018-05-18 2019-04-11 Schaeffler Technologies AG & Co. KG Nockenwellenverstellsystem mit hydraulischem Nockenwellversteller und elektrischem Nockenwellenversteller
DE102019132075A1 (de) * 2019-11-27 2021-05-27 Schaeffler Technologies AG & Co. KG Nockenwellenverstellsystem mit zwei Nockenwellenverstellern sowie Verbrennungskraftmaschine mit Nockenwellenverstellsystem

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1030035A2 (fr) * 1999-02-18 2000-08-23 Mechadyne PLC Déphaseur
EP1234954A2 (fr) * 2000-11-18 2002-08-28 Mechadyne PLC Variateur de phase
WO2002101207A1 (fr) * 2001-06-11 2002-12-19 Blagoje Cavara Mecanisme de commande d'ouverture et de fermeture de clapet
GB2401163A (en) * 2003-04-29 2004-11-03 Mechadyne Plc Variable phase mechanism
EP1860286A2 (fr) * 2006-05-27 2007-11-28 Mahle International GmbH Arbre à cames
US7841311B2 (en) * 2008-01-04 2010-11-30 Hilite International Inc. Variable valve timing device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230074A1 (de) * 1992-09-09 1994-03-10 Bayerische Motoren Werke Ag Hubkolben-Brennkraftmaschine mit zwei Gaswechselventilen je Zylinder
DE102005061187A1 (de) * 2005-12-21 2007-06-28 Mahle International Gmbh Nockenwelle
DE102009041755B4 (de) * 2008-10-09 2019-02-21 Schaeffler Technologies AG & Co. KG Doppeltes unabhängiges Verstellsystem zum unabhängigen Verstellen der Ansaug- und der Ausstoßnockenerhebungen einer konzentrischen Nockenwellenanordnung
GB2472054B (en) * 2009-07-23 2013-02-27 Mechadyne Plc Phaser assembly for an internal combustion engine
US8371257B2 (en) * 2010-03-10 2013-02-12 GM Global Technology Operations LLC Engine with dual cam phaser for concentric camshaft

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1030035A2 (fr) * 1999-02-18 2000-08-23 Mechadyne PLC Déphaseur
EP1234954A2 (fr) * 2000-11-18 2002-08-28 Mechadyne PLC Variateur de phase
WO2002101207A1 (fr) * 2001-06-11 2002-12-19 Blagoje Cavara Mecanisme de commande d'ouverture et de fermeture de clapet
GB2401163A (en) * 2003-04-29 2004-11-03 Mechadyne Plc Variable phase mechanism
EP1860286A2 (fr) * 2006-05-27 2007-11-28 Mahle International GmbH Arbre à cames
US7841311B2 (en) * 2008-01-04 2010-11-30 Hilite International Inc. Variable valve timing device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2013053421A1 *

Also Published As

Publication number Publication date
CN103857882B (zh) 2017-06-09
WO2013053421A1 (fr) 2013-04-18
DE102011116130A1 (de) 2013-04-18
CN103857882A (zh) 2014-06-11

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