WO2017101909A1 - Dispositif d'actionnement pour soupapes d'inversion d'un moteur à combustion interne et moteur à combustion interne - Google Patents

Dispositif d'actionnement pour soupapes d'inversion d'un moteur à combustion interne et moteur à combustion interne Download PDF

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Publication number
WO2017101909A1
WO2017101909A1 PCT/DE2016/100583 DE2016100583W WO2017101909A1 WO 2017101909 A1 WO2017101909 A1 WO 2017101909A1 DE 2016100583 W DE2016100583 W DE 2016100583W WO 2017101909 A1 WO2017101909 A1 WO 2017101909A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuating device
shift fork
internal combustion
combustion engine
vorlauffunktionsflache
Prior art date
Application number
PCT/DE2016/100583
Other languages
German (de)
English (en)
Inventor
Uwe Schaffrath
Original Assignee
Fev Gmbh
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 Fev Gmbh filed Critical Fev Gmbh
Priority to DE112016005826.8T priority Critical patent/DE112016005826A5/de
Publication of WO2017101909A1 publication Critical patent/WO2017101909A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length

Definitions

  • the invention relates to an actuating device for
  • Connecting rods which have a bung eye and a
  • Pleuellagerauge have are connectable via the Hublagerauge to a crankshaft and the connecting rod bearing eye to a respective cylinder piston of the internal combustion engine.
  • Connecting rod is associated with an eccentric adjusting device having an eccentric body and eccentric rods.
  • the known from DE 10 2010 016 037 AI eccentric body has an eccentric to a midpoint of
  • Pleuellagerauges arranged piston pin bore with a center, wherein the piston pin bore a
  • the eccentric adjusting device is used to adjust an effective connecting rod leff length, which is to be understood as the connecting rod length of the distance of the center of the piston pin bore to a center of the Hubagerauges.
  • an effective connecting rod leff length which is to be understood as the connecting rod length of the distance of the center of the piston pin bore to a center of the Hubagerauges.
  • Each eccentric rod is associated with a piston which is displaceably mounted in a hydraulic chamber or
  • the adjustment of the eccentric adjusting device is initiated by the action of mass and load forces of the internal combustion engine, which act on the eccentric adjusting device in a working cycle of the internal combustion engine. During a working cycle, the directions of action of the forces acting on the eccentric adjusting device are constantly changing.
  • Eccentric rods that interact with the pistons are connected on both sides to the eccentric body.
  • the hydraulic chambers, in which the pistons are guided, can be acted upon or filled with hydraulic oil from the crank bearing eye via hydraulic oil supply lines.
  • Hydraulic oil supply lines In a bore of the respective connecting rod, a changeover valve is received.
  • Hydraulic chambers are in contact with the bore via hydraulic oil drain lines, which receives the changeover valve.
  • the switching position of the changeover valve determines which of the hydraulic chambers is filled with hydraulic oil and softens the
  • Hydraulic chambers is emptied, of which the
  • Adjusting direction or direction of rotation of the eccentric adjusting device depends.
  • the switching valve known from DE 10 2010 016 037 A1 comprises an actuating element, a return spring and a control piston. As stated, the hydraulic oil is applied to the pistons of the eccentric rods guided in the hydraulic chambers
  • crankshaft journals same, and the crank bearing eye a connecting rod bearing shell is arranged.
  • Adjustment direction or direction of rotation of the eccentric adjusting device from. DE 10 2012 112 461 AI describes a further internal combustion engine with an adjustable
  • Connecting rods is variably adjustable.
  • a switching valve is accommodated, which comprises a pick-off.
  • Abgreifer the respective changeover valve is actuated, namely via an attacking on Abgreifer actuator.
  • an actuator for changeover valves of an internal combustion engine with adjustable compression ratio is known.
  • the actuator comprises a shift fork for each switching valve and thus for each to be operated pick-off.
  • Each shift fork comprises opposing shift fork legs, wherein the shift fork legs of the shift forks at the respective
  • the object of the invention is a novel actuator for the switching valves of an internal combustion engine with adjustable compression ratio and an internal combustion engine with such
  • Sections are shortened relative to the crankshaft facing away section. This also serves to increase the
  • crankshaft facing section thereof a brief
  • each shift fork leg so contoured independently of each other and / or tilted in space around axes that a trajectory of a contact point of the respective Abgreifers along the functional surfaces in the region facing away from the transition surface end sides thereof through the crankshaft facing away from the end sides.
  • the Abgreifer the respective switching valve is preferably cylindrical with lateral sections or ends of the same spherical or spherical segment-like contoured end faces formed.
  • At least the Vorlauffunktionsflachen and possibly also the stavengersflachen the respective shift fork are preferably contoured and / or tilted in the space that the point of contact of the respective Abgreifers with the
  • Fig. 1 is a connecting rod with eccentric adjustment
  • Fig. 2 shows an actuating device according to the invention for
  • Fig. 3 is a shift fork of the invention
  • FIG. 4 shows a shift fork leg of the shift fork of FIG. 3;
  • Fig. 5 shows a shift fork together with a pick-off a
  • Fig. 1 shows a connecting rod 1 of an internal combustion engine with adjustable compression ratio according to a
  • the connecting rod 1 has a connecting rod main body 7 with a connecting rod bearing eye 2 and a Hublagerauge 3.
  • the connecting rod eye 2 serves to connect the respective
  • the Hublagerauge 3 serves to connect the respective connecting rod 1 to a crankshaft (not shown) of the internal combustion engine.
  • the connecting rod 1 of Fig. 1 has an at least
  • the eccentric adjusting device 6 has an eccentric to a central axis 8 of the
  • Pleuellagerauges 2 arranged piston pin bore with a central axis, which receives a piston pin (not shown). About the piston pin, the respective connecting rod 1 is coupled to the cylinder piston of the respective cylinder.
  • the eccentric adjusting device 6 is used to adjust an effective connecting rod leff length of the connecting rod 1, A rotation of the adjustable eccentric adjusting device 6 is by the action of mass and load forces of
  • the directions of action of the forces acting on the eccentric device 6 are continuous.
  • the rotational movement or adjusting movement is assisted by hydraulic fluid, in particular with oil, acted upon, integrated in the connecting rod assembly 1 and guided in hydraulic chambers piston, and the piston prevent a return of the eccentric adjusting device 6 due to varying
  • the pistons of the eccentric adjusting device 6 are operatively connected by means of eccentric rods 4, 5 on both sides with an eccentric body 9 of the eccentric adjusting device 6.
  • the eccentric adjusting device 6 can iron the pistons, the eccentric rods 4, 5 and the eccentric body 9.
  • the pistons of the eccentric adjusting device 6 are not shown in Fig. 1 hydraulic fluid lines from the Hublagerauge 3 with hydraulic fluid over in Fig. 1, not shown
  • the check valves prevent a backflow of the hydraulic fluid from the piston volumes of the pistons back into the hydraulic fluid lines in an engine compartment of the internal combustion engine.
  • a bore of the respective connecting rod 1 is a
  • Eccentric adjusting device 6 of the respective connecting rod 1 are connected via hydraulic fluid lines with the bore in contact, which receives the switching valve 10.
  • Switching position of the switching valve 10 determines' which of the hydraulic chambers belublit with hydraulic oil and which of the
  • Hydraulic chambers is emptied, of which the
  • Adjusting direction or direction of rotation of the eccentric adjusting device 6 depends.
  • the respective change-over valve 10 of the respective connecting rod 1 has a tappet 12.
  • the respective change-over valve 10 can be actuated by way of the tappet 12, namely via an actuating device 11 acting on the tappet 12.
  • Details of the change-over valve 10 of the respective connecting rod 1 and the tappet 12 of the respective change-over valve 10 are known to the person skilled in the art, e.g. from DE 10 2012 112 461 AI familiar.
  • Actuator 11 for such a variable compression ratio internal combustion engine namely an actuator 11, the actuation of the
  • Abgreifer 12 of the switching valves 10 of a plurality of connecting rods 1 is used.
  • the actuating device 11 for actuating a plurality of changeover valves 10 of an internal combustion engine with an adjustable compression ratio has a plurality of shift forks 13, each of the shift forks 13 each having a tappet 12 each of a changeover valve 10 to be actuated
  • All shift forks 13 are preferably attached to a common support structure 14.
  • the support structure 14 of the actuator 11 has a mounting frame 15 and at least one, in the shown
  • Embodiment preferably a common for all shift forks 13, relative to the mounting frame 15 displaceable
  • the workedseimplent 16 has in the shown
  • Embodiment over two mutually parallel guide rails 17, 18 which are fixedly connected to each other via a connecting web 19.
  • At each guide rail 17, 18 of the guide member 16 are a plurality of shift forks 13th
  • the guide element 16 is the
  • Actuator 15 has moved, the tappet 12 of the respective switching valve 10 for actuating the same
  • Internal combustion engine with adjustable compression ratio can be adjusted.
  • the shift of the shift forks 13 of the actuator 11 from the first shift position to the second shift position is preferably carried out by means of a not shown
  • the restoring force in particular the spring force of the
  • Each shift fork 13 comprises opposing shift fork legs 13a, 13b. Everybody asks
  • Contact point 28 can move along a trajectory 27 along these functional surfaces 21, 22 (see Fig. 5).
  • the Abgreifer 12 of the respective ümschaltventils 10 is
  • Shift fork leg 13a, 13b of each shift fork 13, a transition surface 23 is formed.
  • transition surface 23 formed in the region of each shift fork leg 13a, 13b of the shift fork is preferably triangular-shaped, alternatively it may also be square-shaped
  • End faces 24 and 25 are designed such that they run chamfered at a crankshaft-facing portion 24a and 25a with respect to a crankshaft facing away portion 24b, 25b, so that both the
  • the transition surface 23 at a crankshaft-facing portion 23 a thereof has a shorter extension between the Vorlauffunktionsflache 21 and the return function surface 22 as a crankshaft facing away portion 23 b thereof. Starting from the crankshaft facing away from section 23b, therefore, the transition surface 23 tapers in the direction of the crankshaft facing portion 23a thereof.
  • Shift fork 13 are contoured independently.
  • the Vorlauffunktionsflachen 21 and the vomerf n respectively by planes which are tilted freely about at least two axes in space, wherein the tilt of the Vorlauffunktionsflache 21 and the
  • Vorlauffunktionsflache 21 and return function surface 22 extends, so that the movement path 27 of the
  • crankshaft facing portions 24a, 24b of the end faces 24, 25 is spaced apart.
  • the pick-off 12 of the respective switching valve 10 is
  • the tappet 12 is preferably a cylindrical pin and has a diameter d.
  • the tappet 12 is at its lateral end faces, which cooperate with the functional surfaces of the respective shift fork 13, preferably
  • At least the Vorlauffunktionsflache 21 and if possible depending on the available space and the stalauffunktionsflache 22 of the respective shift fork leg 13a, 13b of the respective shift fork 13 is contoured and / or tilted so that the pitch angle of the respective functional area smaller than aresin ((d / 2) / r ).
  • This can then be particularly preferred to ensure that the contact point 28 of the respective Abgreifers 12 with the respective functional surface 21, 22 of the respective shift fork 13 is always on the spherical segment-like end face of the Abgreifers 12.
  • at least the leading functional surfaces 21 are contoured in this way. In the area of the return function surfaces 22, this is also preferred. For the return function surfaces 22 but can for reasons of space in favor of
  • Vorlauffunktionsflachen 21 also another contouring and / or tilting can be selected, in such a way that the contact point 28 of the respective Abgreifers 12 with the respective return function surface 22 of the respective shift fork 13 is located on an edge of the Abgreifers 12.
  • the invention accordingly proposes a defined contouring of the shift fork legs 13a, 13b of each shift fork 13 of the actuating device 11 for changeover valves 10 of an internal combustion engine with an adjustable compression ratio.
  • the Abgreifern 12, namely the lateral end faces of the Abgreifer 12, facing sides of Schaitgabekelkel 13a, 13b are contoured to form Vorlauffunktions vom 21 and stuntfunktionsflachen 22, wherein in the region of each shift fork leg 13a, 13b of the respective Wegable 13, the respective Vorlauffunktionsflache 21 and Respective return function surface 22 is designed independently of each other, and between which a transition surface 23 is positioned.
  • Vorlauffunktionsflache 21 and the reminders for the respective Abgreifers are in the region of each Weggabeischkels 13a, 13b contoured such or inclined in space that a defined trajectory 27 of the Berschreibticians 28 of the respective Abgreifers
  • crankshaft facing portions 24a, 25a of these end faces 24, 25 of the functional surfaces 21, 22 extends to the
  • Return function surfaces 22 is positioned. This depends on the direction of rotation of the crankshaft.

Landscapes

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

Abstract

L'invention concerne un dispositif d'actionnement (11) pour soupapes d'inversion (10) d'un moteur à combustion interne à taux de compression réglable, chaque soupape d'inversion servant à la commande d'un flux d'huile hydraulique dans des chambres hydrauliques d'un dispositif de réglage d'excentrique d'une bielle respective du moteur à combustion interne, et chaque soupape d'inversion comprenant un curseur (12) qui peut être actionné par le dispositif d'actionnement (11), le dispositif d'actionnement (11) pour chaque soupape d'inversion et donc pour chaque curseur (12) à actionner comprenant une fourchette de commande (13) dotée de branches de fourchette de commande (13a) se faisant face, chacune des branches de fourchette de commande (13a) de chaque fourchette de commande (13) étant profilée sur un côté tourné vers le curseur respectif en formant une surface fonctionnelle d'aller (21) et une surface fonctionnelle de retour (22), et une surface de transition (23) étant formée entre la surface fonctionnelle d'aller (21) et la surface fonctionnelle de retour (22) de la branche de fourchette de commande (13a) respective.
PCT/DE2016/100583 2015-12-16 2016-12-14 Dispositif d'actionnement pour soupapes d'inversion d'un moteur à combustion interne et moteur à combustion interne WO2017101909A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112016005826.8T DE112016005826A5 (de) 2015-12-16 2016-12-14 Betätigungseinrichtung für Umschaltventile eines Verbrennungsmotors und Verbrennungsmotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015016235.7 2015-12-16
DE102015016235.7A DE102015016235A1 (de) 2015-12-16 2015-12-16 Betätigungseinrichtung für Umschaltventile eines Verbrennungsmotors und Verbrennungsmotor

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Publication Number Publication Date
WO2017101909A1 true WO2017101909A1 (fr) 2017-06-22

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Country Status (2)

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DE (2) DE102015016235A1 (fr)
WO (1) WO2017101909A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115217640A (zh) * 2022-03-01 2022-10-21 广州汽车集团股份有限公司 压缩比切换装置、可变压缩比发动机及汽车

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703948C1 (de) * 1997-02-03 1998-06-18 Meta Motoren Energietech Vorrichtung zur Veränderung der Verdichtung einer Hubkolbenbrennkraftmaschine
DE102005055199A1 (de) * 2005-11-19 2007-05-24 Fev Motorentechnik Gmbh Hubkolbenverbrennungskraftmaschine mit einstellbar veränderbarem Verdichtungsverhältnis
DE102010016037A1 (de) 2010-03-19 2011-09-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil
US20130247879A1 (en) * 2012-03-23 2013-09-26 Michael von Mayenburg Combustion engine with stepwise variable compression ratio (svcr)
WO2014019684A1 (fr) 2012-07-30 2014-02-06 Fev Gmbh Unité d'actionnement pour composants de mécanisme moteur variables
DE102012112461A1 (de) 2012-12-18 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703948C1 (de) * 1997-02-03 1998-06-18 Meta Motoren Energietech Vorrichtung zur Veränderung der Verdichtung einer Hubkolbenbrennkraftmaschine
DE102005055199A1 (de) * 2005-11-19 2007-05-24 Fev Motorentechnik Gmbh Hubkolbenverbrennungskraftmaschine mit einstellbar veränderbarem Verdichtungsverhältnis
DE102010016037A1 (de) 2010-03-19 2011-09-22 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil
US20130247879A1 (en) * 2012-03-23 2013-09-26 Michael von Mayenburg Combustion engine with stepwise variable compression ratio (svcr)
WO2014019684A1 (fr) 2012-07-30 2014-02-06 Fev Gmbh Unité d'actionnement pour composants de mécanisme moteur variables
DE102012112461A1 (de) 2012-12-18 2014-06-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Umschaltventil und Verbrennungsmotor mit einem derartigen Umschaltventil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115217640A (zh) * 2022-03-01 2022-10-21 广州汽车集团股份有限公司 压缩比切换装置、可变压缩比发动机及汽车

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DE102015016235A1 (de) 2017-06-22
DE112016005826A5 (de) 2019-05-09

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