EP2060755A2 - Unité de commande de soupape d'un moteur à combustion interne - Google Patents

Unité de commande de soupape d'un moteur à combustion interne Download PDF

Info

Publication number: EP2060755A2
Authority: EP; European Patent Office
Prior art keywords: recess; housing; assembly according; slave; flange
Prior art date: 2007-11-13
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

EP08167286A

Other languages

German (de)

English (en)

Other versions

EP2060755B1 (fr

EP2060755A3 (fr

Inventor

Calin Petru Itoafa

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.)

Schaeffler Technologies AG and Co KG

Original Assignee

Schaeffler Technologies AG and Co KG

Schaeffler KG

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.)

2007-11-13

Filing date

2008-10-22

Publication date

2009-05-20

2008-10-22 Application filed by Schaeffler Technologies AG and Co KG, Schaeffler KG filed Critical Schaeffler Technologies AG and Co KG

2009-05-20 Publication of EP2060755A2 publication Critical patent/EP2060755A2/fr

2011-08-31 Publication of EP2060755A3 publication Critical patent/EP2060755A3/fr

2012-09-05 Application granted granted Critical

2012-09-05 Publication of EP2060755B1 publication Critical patent/EP2060755B1/fr

Status Not-in-force legal-status Critical Current

2028-10-22 Anticipated expiration legal-status Critical

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- 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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic

Definitions

the invention relates to a structural unit of a valve train of an internal combustion engine with hydraulically variable gas exchange valve actuation.
the structural unit comprises a housing with a recess, a receiver housing fixedly fitted in the recess and a slave piston axially movably mounted in a bore of the slave housing. This acts on the one hand with a gas exchange valve and limits the other hand, extending in the bore receiving chamber, wherein the radially oriented by the wall of the recess slave housing has a bottom of the recess facing end face with a sealing surface which is at least indirectly clamped against the bottom of the recess.
Such a unit is considered from the considered generic EP 1 344 900 B1 previously known.
the structural unit proposed therein is a housing which can be mounted in the cylinder head of the internal combustion engine for receiving specific components of a hydraulic valve train, which are required for the variable transmission of a cam lift to the gas exchange valve according to the known lost-motion principle.
these components are an encoder housing with a guided therein and a donor chamber limiting master piston as nocken workedem drive, the valve-side slave housing with the slave piston as valve-side output, connected to the master chamber and the slave chamber, electrically controllable hydraulic valve for time-variable Abêtn of Hydraulic fluid from the chambers and a pressure accumulator for intermediate storage of the hydraulic fluid.
the receiver housing firmly fitted in the recess of the housing radially aligns with its outer lateral surface in the wall of the recess, so that the wall run tolerances of the bottom of the recess and / or on the outer circumferential surface the bearing of the driver housing related tolerances lead from the end face to a local gap between the frontal sealing surface on the front side and the bottom, the gap in turn causes an undefined outflow of hydraulic fluid from the slave chamber at the time of valve closing operation.
the gap could be closed as a precaution by further axial compression of the slave housing in the recess, but there would be the increased risk of unacceptably high deformation of the slave piston bearing hole and thus a jamming of the slave piston in the bore.
this problem would be exacerbated by housing and Nehmergeophusetechnik with different thermal expansion coefficients, for example, the housing would consist of an aluminum material with relatively high thermal expansion and the slave housing made of a steel material with relatively low thermal expansion and consequently the front of the slave housing at very low temperatures additionally would be clamped against the bottom of the recess.
the present invention is therefore based on the object, a structural unit of the type mentioned in such a way that the above-mentioned disadvantage is eliminated by simple means. Accordingly, the assembly should be such that even with deficient and therefore less expensive manufacturable component tolerances of the effluent during the final closing phase of the gas exchange valve from the slave chamber hydraulic fluid flow is displaced only over the defined cross section of the hydraulic valve brake.
this object is achieved in that in the voltage flow between the end face of the slave housing and the bottom of the recess at least one gap compensation element with predetermined axial deformability to achieve an at least almost complete sealing effect of the sealing surface is arranged.
all component surfaces clamped between the end face of the slave housing and the bottom of the recess should be braced against each other by elastic and possibly plastic deformation of the gap compensation element, at least as far as possible.
the gap compensation element may be, on the one hand, a component clamped between the end face of the slave housing and the bottom of the recess or the front side or the bottom itself, each with a specific surface design having a predetermined surface area elastic and optional plastic deformability is provided. On the other hand, it can also be a component which has only a predetermined elastic and optionally plastic deformability.
FIG. 1 Shown is an output-side section of a structural unit of a valve train of an internal combustion engine with hydraulically variable gas exchange valve actuation, which is known to those skilled in the art, for example from the cited document cited.
the preassembled and arranged in a cylinder head of the internal combustion engine assembly 1 comprises a housing 2 made of aluminum material, arranged in a hollow cylindrical recess 3 of the housing 2
the slave housing 6 made of steel material and a slave piston 6 axially movably mounted in a bore 5 of the slave housing 6.
the slave piston 6, which is designed in several parts with a pressure piece 7 and a hydraulic valve play compensation element, interacts with a gas exchange valve 9 subjected to force in the closing direction and limits one with hydraulic fluid filled receiving chamber 10 which communicates hydraulically with a drive-side donor chamber 13 in the known stroke of the slave piston 6 and the gas exchange valve 9 in a known manner via channels 11 in the slave housing 4 and a 10 opening in the direction of the slave chamber 10 check valve.
the check valve 12 is part of an attached to the slave housing 4 and the slave chamber 10 limiting cap member 14, which is formed with an outer cap 15, an inner cap 16 inserted therein and a movably disposed between the outer cap 15 and the inner cap 16 and designed as a ball check valve body 17 in several parts is.
the cap member 14 is still an optional component of the assembly 1, as a valve distal end face 18 of the slave housing 4 may alternatively be clamped directly against a bottom 19 of the recess 3.
FIG. 8 clarified, in which the structural conditions of the unit without inventive gap compensation element are shown enlarged.
the undesired change in cross section may be, in particular, a wedge-shaped gap 22 between the valve-distal end face 18 of the slave housing 4 and a flange 23 of the cap element 14, which is greatly exaggerated here.
the gap 22 is caused by geometric discontinuities due to unavoidable component tolerances and concretely by perpendicularity deviations of the slave housing 4 and the recess 3 in the housing 2.
the end face 18 of the slave housing 4 is not ideally perpendicular to its outer lateral surface 24 and / or the bottom 19 of the recess 3 is not ideally perpendicular to the wall 25. Since the by means of screwing and / or pressing firmly in the recess 3 fitted slave housing aligned with its outer circumferential surface 24 on the wall 25 of the recess 3 radially, run in the general case, the end face 18 facing surface 26 of the bottom 19 and extending on the end face 18 of the slave housing 4 sealing surface 27 is not parallel to each other.
the biasing force is so high that it seals the flange 23 at all occurring pressure conditions in the slave chamber 10 plane-parallel against the sealing surface 27th (please refer FIG. 8 ) of the slave housing 4.
the illustrated individual spring may be, for example, a disc spring package or a helical spring.
FIGS. 2 and 3 are each formed as a ring 29 and 30 formed gap compensation elements, which are also clamped between the bottom 19 of the recess 3 and the flange 23 of the cap member 14.
the rings 29, 30 differ in their cross-sectional shape, wherein the ring 29 is a rectangular ring, while the ring 30 has a circular or oval cross-section.
the cross-sectional shapes mentioned refer to the undeformed state of the rings 29, 30, ie, when the housing 4 is not yet fitted in the housing 2.
Elastomeric materials as well as metallic materials, such as aluminum or low-alloyed steels, may be provided as annular materials.
the gap compensation element is a radially height-adjustable squeeze contour 31, which is formed as a circumferential bead on a sealing surface 27 facing surface 26 'of the bottom 19 itself.
the flange 23 of the cap member 14 is clamped with flat end faces 32 and 33 between the end face 18 of the slave housing 4 and the bottom 19 and the bottom end face 32, the bead 31 elastically and possibly plastically deformed, has a different cap member 14 'according to FIG. 5 a the bottom just formed 19 of the recess 3 facing end face 32 'with a radially height-adjustable squeezing contour 34 as a gap compensation element.
the crimping contour 34 of the flange 23 is formed as a circumferential bead, which is clamped under elastic and possibly plastic deformation against the bottom 19 of the recess 3.
cap member 14 has a valve-side, ie the sealing surface 27 of the slave housing 4 facing end face 33" of the flange 23 a radially height-adjustable, circumferential crimping contour 35 as a gap compensation element.
the squeeze contour 35 is formed as a flat or spherical shaped and the flange 23 in this exaggerated representation outwardly tapering chamfer.
the sealing surface 27 of the slave housing 4 has a radially height-adjustable crimping contour 36 as a gap compensation element.
This squeezing contour 36 is likewise a chamfer formed on the entire end face 18 in a plane or convex manner and sloping radially outward.

Landscapes

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

EP08167286A 2007-11-13 2008-10-22 Unité de commande de soupape d'un moteur à combustion interne Not-in-force EP2060755B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102007053981A DE102007053981A1 (de)	2007-11-13	2007-11-13	Baueinheit eines Ventiltriebs einer Brennkraftmaschine

Publications (3)

Publication Number	Publication Date
EP2060755A2 true EP2060755A2 (fr)	2009-05-20
EP2060755A3 EP2060755A3 (fr)	2011-08-31
EP2060755B1 EP2060755B1 (fr)	2012-09-05

Family

ID=40414026

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP08167286A Not-in-force EP2060755B1 (fr)	2007-11-13	2008-10-22	Unité de commande de soupape d'un moteur à combustion interne

Country Status (2)

Country	Link
EP (1)	EP2060755B1 (fr)
DE (1)	DE102007053981A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2012110120A1 (fr) *	2011-02-18	2012-08-23	Schaeffler Technologies AG & Co. KG	Mécanisme de distribution hydraulique d'un moteur à combustion interne
WO2021078322A1 (fr) *	2019-10-25	2021-04-29	Schaeffler Technologies AG & Co. KG	Unité hydraulique d'un système électrohydraulique de commande de soupape d'échange de gaz

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102009043649A1 (de)	2009-09-29	2011-03-31	Schaeffler Technologies Gmbh & Co. Kg	Hydraulischer Ventiltrieb einer Brennkraftmaschine
DE102009043659A1 (de)	2009-09-29	2011-03-31	Schaeffler Technologies Gmbh & Co. Kg	Hydraulischer Ventiltrieb einer Brennkraftmaschine
DE102012212054A1 (de) *	2012-07-11	2014-01-16	Schaeffler Technologies AG & Co. KG	Pumpeneinheit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1344900B1 (fr)	2002-03-15	2007-03-07	C.R.F. Società Consortile per Azioni	Moteur à combustion interne aux plusieurs cylindres avec commande des soupapes variable et dispositif à freinage aux soupapes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
ITTO20010272A1 (it) *	2001-03-23	2002-09-23	Fiat Ricerche	Motore a combustione interna con valvole ad azionamento variabile e punteria idraulica ausiliaria.
DE602004005476T2 (de) *	2004-12-23	2007-11-29	C.R.F. S.C.P.A.	Brennkraftmaschine mit hydraulischen variablen Ventilen

2007
- 2007-11-13 DE DE102007053981A patent/DE102007053981A1/de not_active Withdrawn
2008
- 2008-10-22 EP EP08167286A patent/EP2060755B1/fr not_active Not-in-force

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1344900B1 (fr)	2002-03-15	2007-03-07	C.R.F. Società Consortile per Azioni	Moteur à combustion interne aux plusieurs cylindres avec commande des soupapes variable et dispositif à freinage aux soupapes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2012110120A1 (fr) *	2011-02-18	2012-08-23	Schaeffler Technologies AG & Co. KG	Mécanisme de distribution hydraulique d'un moteur à combustion interne
US9267397B2 (en)	2011-02-18	2016-02-23	Schaeffler Technologies AG & Co. KG	Hydraulic valve train of an internal combustion engine
WO2021078322A1 (fr) *	2019-10-25	2021-04-29	Schaeffler Technologies AG & Co. KG	Unité hydraulique d'un système électrohydraulique de commande de soupape d'échange de gaz
US11761359B2 (en)	2019-10-25	2023-09-19	Schaeffler Technologies AG & Co. KG	Hydraulic unit of an electrohydraulic gas exchange valve control system

Also Published As

Publication number	Publication date
EP2060755B1 (fr)	2012-09-05
DE102007053981A1 (de)	2009-05-14
EP2060755A3 (fr)	2011-08-31

Publication	Publication Date	Title
WO2009010352A1 (fr)	2009-01-22	Tendeur hydraulique à soupape de décharge intégrée
EP1989436B1 (fr)	2010-03-17	Dispositif d'injection de carburant pour moteur a combustion interne
EP2060755B1 (fr)	2012-09-05	Unité de commande de soupape d'un moteur à combustion interne
DE102009000900A1 (de)	2010-08-26	Verbesserte Zahnstangengehäusepressverbindung
DE102007047417A1 (de)	2009-04-09	Kolbenpumpe zur Förderung eines Fluids und zugehöriges Bremssystem
DE19721227A1 (de)	1998-11-26	Kolbenpumpe
DE102007047419A1 (de)	2009-04-09	Kolbenpumpe zur Förderung eines Fluids und zugehöriges Bremssystem
DE102011076665A1 (de)	2012-12-06	Düsenbaugruppe für einen Kraftstoffinjektor sowie Kraftstoffinjektor
DE102014222589B4 (de)	2017-08-10	Nockenwellenversteller mit modifizierter Abdichtung
EP2325472B1 (fr)	2013-03-06	Composant d'étanchéité et soupape dotée d'un composant d'étanchéité
EP1714026B1 (fr)	2009-05-20	Soupape d'injection de carburant
DE10360450A1 (de)	2004-09-09	Brennstoffeinspritzventil
WO2008116703A1 (fr)	2008-10-02	Mécanisme de distribution d'un moteur à combustion interne
EP1208321A1 (fr)	2002-05-29	Soupape pour reguler le debit de liquides
DE102019109865A1 (de)	2019-11-14	Hydraulikeinheit einer elektrohydraulischen Gaswechselventilsteuerung
DE102014201481B4 (de)	2022-03-10	Schwingungsdämpfer, sowie Kolbenventil für einen Schwingungsdämpfer
DE102019120227A1 (de)	2020-08-06	Ventil und Vorrichtung zur Regelung von Drücken eines Strömungsmittels mit dem Ventil sowie Vorrichtung zur Sicherung des Ventils in dem Getriebebauteil
WO2019137844A1 (fr)	2019-07-18	Ensemble vanne pour la régulation de pression de gaz, système d'alimentation en carburant muni d'un ensemble vanne pour la régulation de pression de gaz
DE102009000875A1 (de)	2010-08-19	Kraftstoffinjektor
EP3181888B1 (fr)	2019-01-09	Injecteur de carburant
EP2226490B1 (fr)	2011-12-28	Injecteur de carburant
DE102010008002A1 (de)	2011-08-18	Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine
DE102007044616A1 (de)	2009-04-02	Kompensationsvorrichtung
DE102006023795A1 (de)	2007-09-06	Druckstückeinheit für ein Zahnstangenlenkgetriebe
WO2016131512A1 (fr)	2016-08-25	Système à haute pression de carburant pour moteurs à combustion interne

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