EP2627877A1 - Aktuator eines elektrohydraulischen gaswechselventiltriebs einer brennkraftmaschine - Google Patents
Aktuator eines elektrohydraulischen gaswechselventiltriebs einer brennkraftmaschineInfo
- Publication number
- EP2627877A1 EP2627877A1 EP11736110.5A EP11736110A EP2627877A1 EP 2627877 A1 EP2627877 A1 EP 2627877A1 EP 11736110 A EP11736110 A EP 11736110A EP 2627877 A1 EP2627877 A1 EP 2627877A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- housing
- bore
- actuator
- gas exchange
- 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
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
- F01L1/14—Tappets; Push rods
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
Definitions
- the invention relates to an actuator of an electrohydraulic gas exchange valve drive of an internal combustion engine, comprising an attachable in the internal combustion engine actuator housing with a bore, a rotatably received in the bore valve lash adjuster with a differential housing for actuating the gas exchange valve and the extension movement of the differential housing From the bore limiting axial stop with radially overlapping attacks, which are each arranged axially fixed on the part of the bore and the differential housing.
- the variability of the timing and the maximum stroke at the gas exchange valve is known that between a cam of a camshaft and the gas exchange valve, a so-called hydraulic linkage is arranged with a pressure chamber whose volume is steplessly controlled via an electromagnetic hydraulic valve in a pressure relief space.
- a so-called hydraulic linkage is arranged with a pressure chamber whose volume is steplessly controlled via an electromagnetic hydraulic valve in a pressure relief space.
- the camshaft predetermined by the camshaft is completely, partially or not at all converted into a stroke of the gas exchange valve.
- the present invention relates to the gas exchange valve side part of the Ventiltriebaktuatorik whose movement corresponds to the stroke of the gas exchange valve.
- an actuator of the type mentioned in DE 10 2007 030 215 A1 is known.
- the actuator housing is a bush which is screwed into a hydraulic unit fastened in the cylinder head of the internal combustion engine and in the bore of which a hydraulically actuated slave piston and an adjoining hydraulic valve play compensation element of known construction are mounted so as to be axially movable.
- the differential housing of the valve lashed compensating elements not on the gas exchange valve, and falling out of the differential housing from the bore of the actuator housing is prevented by the then effective axial stop.
- Whose stops are on the part of the differential housing of a polygonal snap ring, which is inserted radially projecting in an annular groove on the outer surface of the differential housing, and the bore of a shoulder formed by a reduced diameter bore hole.
- the present invention has for its object to constructively improve an actuator of the type mentioned in such a way that in differently designed gas exchange valve drives, in particular the valve strokes generate different large maximum strokes on the gas exchange, appropriately adapted actuators with as many (inexpensive to produce) common parts can be used ,
- the compensating housing-side stop should be a collar extending radially outwards and comprising a sleeve enclosing the outer casing of the differential housing.
- the compensating housing side stop in the form of snap ring always at the same axial position relative to the differential housing - the sleeve serves as an easy-to-fit adapter with different positionable height stop in the form of the sleeve collar.
- the Axialbeweglich- speed of the differential housing in the bore on the axial dimensioning of the sleeve can be varied and adapted to differently designed gas exchange valve trains, while it is the differential housings and if necessary. also in the actuator housings in each case to equal parts.
- the abutment surface on the collar is intended to extend outside the axial extension of the outer casing of the differential housing in a gas-exchange-valve-remote direction.
- the axial attachment of the sleeve on the differential housing can be done on a form-fitting.
- the inner jacket of the sleeve may be provided with at least one bead, which engages in an annular groove on the outer jacket of the differential housing.
- the sleeve engages behind the outer casing of the differential housing which tapers radially on the end portion close to the gas exchange valve.
- the axial attachment of the sleeve on the differential housing can be done on the other non-positively, wherein between the inner shell of the sleeve and the outer jacket of the differential housing is a press fit.
- the interference fit allows to secure the sleeve with largely any axial positions of the stop on the differential housing.
- the bore-side stop should be a collar, which extends radially inward and is a further sleeve enclosing an outer jacket of the actuator housing. Unlike in the cited prior art, it is not necessary to produce the hole stepped with a comparatively complex undercut.
- the further sleeve does not surround the outer casing of the actuator housing, but is fastened to the inner casing of the bore.
- the axial fastening of the further sleeve can be effected in a force-locking manner, wherein between the inner jacket of the sleeve and the outer jacket of the actuator housing (or between the outer jacket of the further sleeve and the inner jacket of the bore according to the aforementioned alternative with a bore tion lining further sleeve) is a press fit.
- the interference fit also makes it possible to attach the further sleeve to the actuator housing with largely any desired axial positions of the stop on the bore side.
- the bore-side stop may also be a ring, for example an elastomeric O-ring or a snap ring, which is inserted in an annular groove extending in the bore and projects radially outward therefrom.
- the sleeves according to the invention can in particular be produced as thin-walled deep-drawn parts made of sheet metal material or as injection-molded parts made of plastic.
- FIG. 1 a shows a first exemplary embodiment in longitudinal section
- Figure 1 b shows the first embodiment in uncut representation
- FIG. 2a shows the differential housing with sleeve of a second exemplary embodiment in longitudinal section
- Figure 2b shows the differential housing with sleeve according to Figure 2a in perspective view
- Figure 3 shows the valve clearance compensation element of a third embodiment in longitudinal section
- Figure 4a shows a fourth embodiment in longitudinal section
- FIG. 5 shows the differential housing with sleeve of a fifth exemplary embodiment as detail
- FIG. 6 shows the differential housing with sleeve of a sixth embodiment as a detail
- FIG. 7 a shows a known actuator in the ready-to-use state in FIG
- FIG. 7b shows the actuator according to FIG. 7a in the disassembled state.
- FIG. 7a a section of a known electro-hydraulic gas exchange valve drive for the variable actuation of a spring-loaded in the closing direction gas exchange valve 1 is disclosed.
- the detail shows an actuator 702 which is mounted in a hydraulic unit 3, which in turn is arranged in the cylinder head (not shown) of an internal combustion engine between the camshaft and the gas exchange valves and responsible for the variable stroke transmission of a cam lift to the respective gas exchange valve 1.
- the actuator 702 comprises a hollow cylindrical actuator housing 704, which is fastened by means of a screw 5 in a receptacle 6 of the hydraulic unit 3, and a slave piston 7 and a hydraulic valve clearance the same element 708, which are accommodated in the central bore 709 below a serving as a hydraulic valve brake throttle valve 10 axially movable.
- the hydraulically pressurized slave piston 7 in turn actuates a pressure piston 71 1, which forms a variable-height pressure chamber 13 of the valve clearance compensation element 708 according to conventional design with a gas exchange valve 1 contacting differential housing 712.
- Figure 7b shows the actuator 702 in the disassembled state of the hydraulic unit 3, in which the valve clearance compensation element 708 is extended to the limit by an axial stop from the bore 709.
- the stops 714 and 715 forming the axial stop are a snap ring on the side of the compensation housing 712 and a shoulder on the bore 709 at the mouth of the bore 709 produced with an undercut.
- the snap ring 714 is inserted in an annular groove 716 running on the outer casing of the differential housing 712 and due to its polygonal shape protrudes locally as far as the annular groove 716 so that it radially overlaps the shoulder 715 and, in the illustrated stop position, prevents the differential housing 712 from falling out of the bore 709.
- the differential housing 712 is extended slightly further than the maximum operating stroke on the gas exchange valve. 1 Accordingly, it would be necessary to move the bore-side stop 715 forming shoulder in the direction of the spring plate 17 with unchanged differential housing 712, but increased maximum stroke.
- this change is limited by the fact that an axial minimum release of the actuator housing 704 to the spring plate 17 must be maintained. In addition, such a change would preclude the more cost-effective common parts principle.
- Embodiments of actuators according to the invention of electrohydraulic gas exchange valve drives which in particular use the same valve play compensation elements 8 at different maximum strokes of the gas allow alternating valves are explained below with reference to Figures 1 to 6.
- an outer jacket of the differential housing 12 enclosing sleeve 18 is provided from deep-drawn sheet material, wherein the compensating housing side stop 14 is formed by a radially outwardly extending collar of the sleeve 18.
- FIGS 1 a and 1 b show a first embodiment.
- the differential housing 1 12 comes from the kit for conventional standard valve trains with hydraulic valve clearance compensation and accordingly has an annular groove 1 16 for a snap ring.
- the annular groove 1 16 is in this case without function, since the sleeve 1 18 frictionally, i. by means of a longitudinal compression bandage between the inner shell and the outer shell of the differential housing 1 12 is attached thereto.
- the bore-side stop 15 is formed in favor of the undercut-free and comparatively cost-effectively produced bore 109 by a collar of a deep-drawn further sleeve 19, which encloses the outer jacket of the actuator housing 104.
- the axial attachment of the further sleeve 19 is also frictionally connected by a compression bandage exists between the inner shell and the six circular arc surfaces 20 of the hexagonal 21 for screwing the actuator housing 104, in which the radially inwardly extending collar 1 15 on the gas exchange valve side end face of the Actuator housing 104 is present.
- the dotted contour in Figure 1 b indicate that the further sleeve 19 can be pressed even without a stop on the end face of the actuator 104 to a predetermined other axial position to change the position of the axial stop accordingly.
- Figures 2a and 2b show a second embodiment.
- the axial attachment of the sleeve 218 on the differential housing 212 takes place in a form-fitting manner in that the inner jacket of the sleeve 218 is provided with three uniformly circumferentially distributed beads 222, which engage in an annular groove 216 with a shape modified with respect to FIG.
- the axial attachment the sleeve 318 on the differential housing 312 both positive and positive.
- the positive connection is produced in that the sleeve 318 engages behind the outer casing of the differential housing 312, which tapers radially at the gas exchange valve end section, with a diameter constriction 23.
- the annular groove 316 of the modular system for conventional standard valve drives derived compensating housing 312 remains functionless here, too.
- the frictional connection is generated by a comparatively slight longitudinal compression bandage between the inner jacket of the sleeve 318 and the outer jacket of the differential housing 312.
- the bore-side stop 415 in the fourth embodiment according to FIG. 4a is formed by a snap ring which is inserted into an annular groove 24 incorporated in the bore 409 and protrudes radially relative thereto.
- the axial attachment of the sleeve 418 on the differential housing 412 takes place in a form-fitting manner by means of a circumferential bead 422 engaging the annular groove 416 on the sleeve 418, which is optionally slotted axially for simplified mounting on the differential housing 412.
- Figure 4b is a detailed view of the embodiment shown in Figure 4a, and Figures 5 and 6 disclose further structural design options - as mentioned above - serving as stop adapter sleeve 18. As in Figure 7b with the symbolically shown hole side stop 15 each by the Axial stop limited extended position of the differential housing 12 is shown.
- the fifth embodiment according to Figure 5 corresponds to the first embodiment in Figure 1 a, wherein instead of the press fit on the inner surface of the sleeve 518 a form-fitting engaging in the annular groove 516 bead 522 is provided.
- the sixth exemplary embodiment according to FIG. 6 likewise corresponds to the first exemplary embodiment, but the differential housing 612 has no annular groove.
- the impact surface 614 of the collar always in gas lobbyventilferner direction outside the axial extension of the outer shell of the differential housing 612.
- the stop 614 is spaced by the axial dimension H to the gas exchange valve remote end face of the differential housing 612.
- the maximum stroke at the gas exchange valve can be increased by the dimension L compared to the known embodiment according to FIG.
- the maximum stroke at the gas exchange valve depends on the sleeve dimension L and the pressing-on dimension P of the sleeve 618 on the differential housing 612.
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
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010048135A DE102010048135A1 (de) | 2010-10-11 | 2010-10-11 | Aktuator eines elektrohydraulischen Gaswechselventiltriebs einer Brennkraftmaschine |
| PCT/EP2011/062982 WO2012048924A1 (de) | 2010-10-11 | 2011-07-28 | Aktuator eines elektrohydraulischen gaswechselventiltriebs einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2627877A1 true EP2627877A1 (de) | 2013-08-21 |
| EP2627877B1 EP2627877B1 (de) | 2014-10-22 |
Family
ID=44629070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11736110.5A Active EP2627877B1 (de) | 2010-10-11 | 2011-07-28 | Aktuator eines elektrohydraulischen gaswechselventiltriebs einer brennkraftmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8826875B2 (de) |
| EP (1) | EP2627877B1 (de) |
| BR (1) | BR112013003715B1 (de) |
| DE (1) | DE102010048135A1 (de) |
| WO (1) | WO2012048924A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010023747A1 (ja) * | 2008-08-28 | 2010-03-04 | トヨタ自動車株式会社 | 密封型ラッシュアジャスタ |
| DE102014201911B4 (de) | 2014-02-04 | 2019-11-21 | Schaeffler Technologies AG & Co. KG | Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine |
| DE102014201910A1 (de) | 2014-02-04 | 2015-08-06 | Schaeffler Technologies AG & Co. KG | Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine |
| DE102014212873B4 (de) | 2014-07-03 | 2016-01-21 | Schaeffler Technologies AG & Co. KG | Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine |
| DE102019104459B4 (de) * | 2019-02-21 | 2023-01-05 | Schaeffler Technologies AG & Co. KG | Aktuator eines hydraulischen Ventiltriebs einer Brennkraftmaschine |
| DE102019128826B4 (de) * | 2019-10-25 | 2022-09-29 | Schaeffler Technologies AG & Co. KG | Hydraulikeinheit einer elektrohydraulischen Gaswechselventilsteuerung |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529446A1 (de) | 1985-08-16 | 1987-02-26 | Audi Ag | Tassenstoessel mit hydraulischer einstellung |
| DE19712656A1 (de) | 1997-03-26 | 1998-10-01 | Schaeffler Waelzlager Ohg | Hydraulisch wirkendes Abstützelement |
| US6039017A (en) * | 1999-02-18 | 2000-03-21 | General Motors Corporation | Hydraulic lash adjuster with lash |
| DE102004036108A1 (de) | 2004-07-24 | 2006-02-16 | Ina-Schaeffler Kg | Periodisch beaufschlagbarer Stößel für einen Ventil- oder Pumpentrieb |
| KR100821741B1 (ko) | 2006-08-23 | 2008-04-11 | 현대자동차주식회사 | 자동차 가변기통장치 엔진의 이중 오일 공급 구조 |
| JP4825631B2 (ja) | 2006-09-19 | 2011-11-30 | 株式会社オティックス | カムハウジング |
| DE102007014248A1 (de) * | 2007-03-24 | 2008-09-25 | Schaeffler Kg | Hubkolbenbrennkraftmaschine mit Motorbremseinrichtung |
| DE102007030215A1 (de) | 2007-06-29 | 2009-01-08 | Schaeffler Kg | Drosselventil für eine Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung |
| US7543555B2 (en) | 2007-08-01 | 2009-06-09 | Eaton Corporation | Hydraulic lash compensation device with mechanical lift loss feature |
| DE102007051302A1 (de) | 2007-10-26 | 2009-04-30 | Schaeffler Kg | Hubkolbenbrennkraftmaschine mit Motorbremse und zusätzlichem Öffnen eines Auslassventils |
| FR2924747B1 (fr) | 2007-11-22 | 2013-10-11 | Valeo Sys Controle Moteur Sas | Actionneur electromagnetique de soupape de moteur thermique. |
| DE102008013259A1 (de) | 2008-03-08 | 2009-09-10 | Schaeffler Kg | Schaltbarer Tassenstößel für einen Ventiltrieb einer Brennkraftmaschine |
-
2010
- 2010-10-11 DE DE102010048135A patent/DE102010048135A1/de not_active Withdrawn
-
2011
- 2011-07-28 WO PCT/EP2011/062982 patent/WO2012048924A1/de not_active Ceased
- 2011-07-28 US US13/825,590 patent/US8826875B2/en active Active
- 2011-07-28 EP EP11736110.5A patent/EP2627877B1/de active Active
- 2011-07-28 BR BR112013003715-6A patent/BR112013003715B1/pt active IP Right Grant
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012048924A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012048924A1 (de) | 2012-04-19 |
| BR112013003715B1 (pt) | 2021-02-09 |
| BR112013003715A2 (pt) | 2020-06-02 |
| EP2627877B1 (de) | 2014-10-22 |
| US20130174799A1 (en) | 2013-07-11 |
| DE102010048135A1 (de) | 2012-04-12 |
| US8826875B2 (en) | 2014-09-09 |
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