EP3102799A1 - Aktuator für einen elektrohydraulischen gaswechselventiltrieb einer brennkraftmaschine - Google Patents
Aktuator für einen elektrohydraulischen gaswechselventiltrieb einer brennkraftmaschineInfo
- Publication number
- EP3102799A1 EP3102799A1 EP15706143.3A EP15706143A EP3102799A1 EP 3102799 A1 EP3102799 A1 EP 3102799A1 EP 15706143 A EP15706143 A EP 15706143A EP 3102799 A1 EP3102799 A1 EP 3102799A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- stroke
- bore
- actuator
- exchange valve
- 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
- 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
-
- 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
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
- F01L9/14—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
-
- 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
- F01L1/245—Hydraulic tappets
- F01L1/25—Hydraulic tappets between cam and valve stem
-
- 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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F01L2201/00—Electronic control systems; Apparatus or methods therefor
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- 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
- F01L9/11—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column
- F01L9/12—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic in which the action of a cam is being transmitted to a valve by a liquid column with a liquid chamber between a piston actuated by a cam and a piston acting on a valve stem
Definitions
- the invention relates to an actuator for an electrohydraulic gas exchange valve drive of an internal combustion engine.
- the actuator comprises an actuator housing which can be mounted on the internal combustion engine and has a bore, a hydraulic piston movably mounted therein for actuating the gas exchange valve and an axial stop which, in the unassembled state of the actuator housing on the internal combustion engine, limits the piston stroke from the bore to an assembly stroke.
- the variability of the timing and the maximum stroke on the gas exchange valve is known to be created by a so-called hydraulic linkage is arranged with a pressure chamber between a cam of a camshaft and the gas exchange valve 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 and which is known for example from the generic DE 10 2010 048 135 A1.
- This extension stroke is limited to an assembly stroke by an axial stop to prevent the hydraulic piston from falling out of the bore before and during assembly of the actuator to the internal combustion engine.
- the dimensioning of the assembly stroke is not just to that before and during assembly of the Aktuatorgehauses the hydraulic piston does not fall out of the bore, but also that the end face of the extended hydraulic piston always touches with sufficient overlap on the front side of the gas exchange valve stem to a lateral placement or slipping of the hydraulic piston on the circumference to prevent the valve stem.
- the risk of such mis-assembly deforming the components increases as the gas exchange valve is inclined, as usual, to the mounting direction of the actuator housing with increasing assembly stroke and increasing inclination angle.
- the present invention has for its object to constructively improve an actuator of the type mentioned so that the security is increased against the above-explained incorrect assembly of the actuator housing on the internal combustion engine.
- the assembly stroke should be smaller than a maximum operating stroke, with which the hydraulic piston actuates the gas exchange valve, wherein the restriction of the piston stroke on the assembly stroke is canceled by the axial stop only temporarily and after the operation of the actuator.
- the stroke limitation to the relatively small assembly stroke can be canceled either already in the course of the actuator assembly by removing or shifting the axial stop or at the latest when commissioning the actuator, that the then pressurized hydraulic piston extends with an operating stroke exceeding the assembly stroke and thereby the position of the axial stop relocated.
- the displacement can take place relative to the bore or to the hydraulic piston.
- the operational automatic displacement of the axial stop takes into account the usually no longer existing accessibility of the actuator in the region of the hydraulic raulikkolbens after placing the actuator on the gas exchange valve.
- the temporary restriction of the piston stroke on the assembly stroke can be removed by removable securing means. This may be, for example, a sapon holding the hydraulic piston, which is removed in the course of the actuator assembly.
- the axial stop is formed in particular by a resiliently deformable element which holds the hydraulic piston against its gravity by the spring force in the assembly stroke.
- the actuator includes a further axial stop, in the mounted state of the actuator housing on the internal combustion engine, the stroke of the hydraulic piston from the bore to a so-called disassembly stroke limited to prevent uncontrolled whereabouts of the hydraulic piston and possibly the mounting axial stop in the internal combustion engine even when disassembling the actuator and then no longer effective axial stop for the assembly.
- the disassembly stroke is the same size, but preferably for acoustic reasons greater than the maximum operating stroke of the gas exchange valve.
- Figure 1 is a schematic representation of a hydraulically variable valve train according to the prior art
- Figure 2 is a schematic representation of an actuator according to the invention during assembly in a cylinder head of an internal combustion engine
- FIG. 3 shows the actuator according to FIG. 2 in the assembled state before the internal combustion engine is put into operation
- FIG. 4 shows the actuator according to FIG. 3 after the internal combustion engine has been put into operation
- Figure 5 shows the first embodiment in longitudinal section, wherein the extension path of the hydraulic piston is limited by means of a bore-side inner sleeve and a piston-side sleeve on the mounting stroke;
- FIG. 6 shows the actuator housing according to FIG. 5 in a non-cut perspective view
- FIG. 7 shows the first exemplary embodiment according to FIG. 5 in section, wherein FIG
- Hydraulic piston is extended to the disassembly stroke
- FIG. 8 shows the second exemplary embodiment in longitudinal section, the extension path of the hydraulic piston being limited to the assembly stroke by means of a piston-side polygonal ring and a bore-side inner sleeve;
- FIG. 9 shows the second exemplary embodiment according to FIG. 8 in section, the hydraulic piston being extended by the dismantling stroke
- Figure 10 shows the third embodiment in longitudinal section, wherein the extension path of the hydraulic piston is limited by means of a bore-side outer sleeve and a piston-side sleeve on the mounting stroke
- Figure 1 1, the bore-side outer sleeve in perspective Einzelteildarwolf;
- FIG. 12 shows the third exemplary embodiment according to FIG. 10 in section, with the FIG
- Hydraulic piston is extended to the disassembly stroke
- Figure 13 shows the fourth embodiment in longitudinal section, wherein the extension path of the hydraulic piston is limited by means of a bore-side spring ring and a piston-side sleeve on the mounting stroke;
- FIG. 14 shows the fourth exemplary embodiment according to FIG. 13 in section, the hydraulic piston being extended by the dismantling stroke
- Figure 15 shows the fifth embodiment in longitudinal section, wherein the extension path of the hydraulic piston is limited by means of a bore-side spring ring and a piston-side sleeve on the mounting stroke;
- FIG. 16 shows the fifth exemplary embodiment according to FIG. 15 in section, the hydraulic piston being extended by the dismantling stroke
- FIG. 17 shows the sixth embodiment in longitudinal section, wherein the extension path of the hydraulic piston is limited by means of a bore-side spring ring and a piston-side sleeve on the mounting stroke;
- FIG. 18 shows the sixth exemplary embodiment according to FIG. 17 in section, the hydraulic piston being extended by the dismantling stroke.
- FIG. 1 shows the basic structure of a known electrohydraulic gas exchange valve drive for variable-stroke actuation of the gas exchange valve 2 force-loaded in the closing direction by a valve spring 1 in the cylinder head 3 of an internal combustion engine.
- the following components are shown: a master piston 5 driven by the cam 4 of a camshaft,
- a non-return valve 1 1 opening in the direction of the medium-pressure space, via which the medium-pressure space is connected to the lubricant circuit of the internal combustion engine
- the variability of the valve lift is generated by the fact that the high-pressure chamber 8 between the master piston 5 and the slave piston 6 acts as a so-called hydraulic linkage, which - neglecting leakage - proportional to the stroke of the cam 4 displaced by the master piston hydraulic volume as a function of the opening time and the Opening duration of the hydraulic valve 7 is split into a first, the slave piston acting on partial volume and in a second, in the medium pressure chamber 9 including piston accumulator 10 and in the low-pressure chamber 12 effluent partial volume.
- the actuating direction between the cam 4 and the gas exchange valve 2 is intended arranged components in an actuator housing to be summarized in a structural unit, which is to be mounted as an actuator in a cylinder head of a combustion engine ine.
- the gas exchange valve is intended to be inclined at an angle ⁇ to the mounting direction according to the arrow direction in FIG. 2 when the actuator 16 is placed on the cylinder head 3.
- the actuator 16 includes the actuator housing 17 with the generally here and hereinafter referred to as a hydraulic piston slave piston 6, which is mounted in a liftable manner in the bore 18 of the actuator housing.
- the gravity-induced extension stroke of the hydraulic piston 6 is limited from the bore by means of an axial stop 19 to the dimension T designated as the assembly stroke.
- Reference for the dimension T is the retracted in the bore position of the hydraulic piston, in which the gas exchange valve 2 is closed - see Figure 3.
- the mounting stroke is dimensioned so that the end face 20 of the hitherto extended hydraulic piston strongly eccentric, but due to sufficient coverage without mounting on the end face 21 of the gas exchange valve stem (and not on its circumference) touches down.
- FIG. 3 shows this fully assembled state of the actuator prior to the startup of the internal combustion engine.
- FIG. 4 shows the case that the maximum operating stroke of the gas exchange valve marked L is greater than the assembly stroke T.
- the hydraulic piston for actuating the gas exchange valve stop and retract, the assembly-related restriction on the assembly stroke may only temporarily and must be repealed during operation of the internal combustion engine. This is done according to the invention in that the axial stop 19 is displaced at least by the difference between L and T.
- FIG. 5 to 7 show the first constructive embodiment of the invention.
- the actuator 1 16 includes in a conventional construction, a hollow cylindrical actuator housing 1 17, which is fastened by means of a screw 23 in a receptacle of the actuator and thereby supports the front side of the valve base used on the valve brake 14.
- the hydraulic piston 6, which is mounted in a liftable manner below the valve brake in bore 18 of the actuator housing 6, is assembled in series with a solid pressure piston 24 and a hydraulic valve play compensation element 25 with a hollow cylindrical piston skirt 26 and a differential housing 27. This actuates the gas exchange valve 2 and encloses the valve-side end portion of the piston skirt to form a variable-height pressure chamber 28 as a valve clearance compensation.
- the axial stop 19 limiting the piston stroke to the (relatively small) assembly stroke generally apply: this comprises a piston-side part 29 which is formed by a projection extending radially outward from the outer circumference of the differential housing 27.
- the bore-side portion 30 of the axial stop 19 is displaceable relative to the bore 18 to cancel the restriction of the piston stroke on the mounting stroke T, and by a radially inwardly extending from or into the inner circumference of the bore projection formed, with the two projections 29 and 30 overlap radially.
- the lifting of the lifting restriction on the assembly stroke is reversible. That means the original one Stop positioning after disassembly of the actuator 16 for the purpose of maintenance or repair of the internal combustion engine by pushing back the displaced stop member - in the embodiments, this is the bore-side stop member 30 - is recoverable.
- the piston-side projection 129 is now formed by a collar, which extends radially outwardly, of a sleeve 131 fastened to the differential housing 27.
- the sleeve is fastened by means of a caulking in an outer circumferential groove 32 of the Ausretesgephinu- ses.
- the bore-side projection 130 is generally formed on a ring 33 and here by a radially inwardly extending collar of an inner sleeve 133.
- the inner sleeve is held by means of clamping on the inner circumference of the stepped in the region of the valve lash adjuster in diameter bore 1 18, and first in accordance with Figure 5 in the vicinity of the diameter stage to limit the extension stroke of the hydraulic piston 6 to the mounting stroke.
- the clamping characteristic of the inner sleeve can be improved by elasticity-increasing slots 34 at the periphery.
- the piston-side protrusion 129 of the hydraulic piston 6 extending after assembly under operational pressurization receives the radially overlapping, bore-side projection 130, so that the restriction of the piston stroke to the assembly stroke is canceled.
- the axial clamping position of the thus displaced in the bore 1 18 inner sleeve 133 shifts depending on the maximum Gas monventilhubs, but only as far as possible until the inner sleeve starts at a further axial stop.
- This generally designated 35 further axial limit limited in the mounted state of the actuator 16 to the internal combustion engine, the piston stroke from the bore 18 to the aforementioned disassembly stroke to even in the disassembly of the actuator from the cylinder head 3 of the engine falling out of the axial stop 19 and the hydraulic piston 6 to prevent from the actuator 17.
- the disassembly stroke R is shown as an example in Figure 8 and at least as large as, to avoid operational contact noise in the axial stop but greater than the maximum stroke of the gas exchange valve. 2
- the further axial stop 135 is formed by a cap 136, which is attached to the bore 1 18 on the outer circumference of the actuator housing 1 17.
- the cap has a projection in the form of a collar 137, which extends radially inwardly into the inner circumference of the bore according to FIG. 7 and radially covers the bore-side projection 130 of the inner sleeve 133.
- the tool engagement required for the screwing in of the actuator housing 17 in its receptacle is embodied as an external hexagon 38 on the actuator housing and can be seen in FIG. 6 below the cap 136 already mounted in this illustration.
- the piston-side projection 229 is formed by a resilient, polygonal wire ring 231, which is supported in the outer circumferential groove 32 of the differential housing 27 and due to the polygonal shape sections radially opposite the contemplatum- protruding.
- the bore-side projection 230 is formed by a clamped on the inner circumference of the bore 218 ring 233 in the form of an inner sleeve which engages under the wire ring.
- the inner sleeve 233 is displaced so far through the wire ring that it completely leaves the bore and rests against the cap 236 forming the further axial stop 235.
- the axial stop 319 of the third exemplary embodiment according to FIGS. 10 to 12 comprises, as in the first exemplary embodiment, a sleeve 331 fastened to the compensating housing 27 with a collar as a piston-side projection 329.
- the bore-side projection 330 is formed by the collar of a ring 333 in the form of an outer sleeve formed, which is supported by means of clamping on the outer circumference of the actuator housing 317.
- the collar 330 extends from the outside radially inwardly into the inner periphery of the bore 318.
- FIG. 1 1 The illustrated in Figure 1 1 as an individual part outer sleeve 333 engages in two axial positions on the actuator housing 317 and is for this purpose each internally circumferentially provided with an upper bead 39 and a lower bead 40, depending on the stroke position of the hydraulic piston 6 on a Support the outer circumferential bead 41 of the actuator housing.
- the piston stroke from the bore 318 is limited to the assembly stroke when, according to FIG. 10, the lower inner bead 40 is supported on the outer bead 41.
- the piston stroke is limited to the disassembly stroke when, in the further axial stop position according to FIG. 12, the upper inner bead 39 is supported on the outer bead.
- the upper inner bead and the outer bead are each formed by a spring ring, wherein the spring ring 39 are held in a slot 42 of the outer sleeve and the spring ring 41 in an outer circumferential groove 43 of the actuator housing.
- the lower inner bead is formed by a circumferential indentation in the outer sleeve.
- the fourth embodiment of the invention is illustrated in Figures 13 and 14. It comprises, as in the first and third embodiments, a mounted on the differential housing 27 sleeve 431 with collar as a piston-side projection 429.
- the bore-side projection 430 is formed by a ring 433 in the form of an open wire ring, which by own spring force on the inner circumference of the bore 418th is clamped and engages under the collar 429 of the sleeve.
- the wire ring 433 is displaced by the sleeve when the hydraulic piston 6 extends as a result of operational pressurization.
- the wire ring can completely leave the hole and is in the position of disassembly stroke on the collar 437 of the cap 436 as another axial stop 435 at.
- the fifth exemplary embodiment shown in FIGS. 15 and 16 differs from the fourth exemplary embodiment in that the resilient wire ring 533 is held in an inner circumferential groove 44 of the bore 518 and is polygonal as a bore-side projection 530.
- the wire ring can escape radially at operational pressurization of the hydraulic piston 6 and Relocating to the collar 529 of the sleeve 531 in the inner circumferential groove, canceling the radial overlap in order to lift the restriction of the piston stroke on the assembly.
- the displacement of the axial stop 619 takes place in the sixth embodiment according to Figures 17 and 18 both in the axial and in the radial direction.
- the bore 618 is provided with two axially spaced inner peripheral grooves 45 and 46, in which the bore-side projection 630 in the form of the wire ring 633 can spread.
- the diameter of the upper inner circumferential groove 45 is dimensioned such that the wire ring spread in it during the assembly stroke of the hydraulic piston 6 and the collar 629 of the sleeve 631 overlap radially as abutment parts.
- the wire ring must first disengage from the upper inner circumferential groove and follow the collar to the lower inner circumferential groove 46, into which the wire ring subsequently spreads.
- the lower inner circumferential groove has a larger diameter than the upper inner peripheral groove and is dimensioned so that the radial overlap between the wire ring spread therein and the collar is canceled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014201910.9A DE102014201910A1 (de) | 2014-02-04 | 2014-02-04 | Aktuator für einen elektrohydraulischen Gaswechselventiltrieb einer Brennkraftmaschine |
| PCT/DE2015/200006 WO2015117603A1 (de) | 2014-02-04 | 2015-01-20 | Aktuator für einen elektrohydraulischen gaswechselventiltrieb einer brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3102799A1 true EP3102799A1 (de) | 2016-12-14 |
| EP3102799B1 EP3102799B1 (de) | 2017-11-29 |
Family
ID=52577578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15706143.3A Active EP3102799B1 (de) | 2014-02-04 | 2015-01-20 | Aktuator für einen elektrohydraulischen gaswechselventiltrieb einer brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9920664B2 (de) |
| EP (1) | EP3102799B1 (de) |
| KR (1) | KR102296625B1 (de) |
| CN (1) | CN105980669B (de) |
| DE (1) | DE102014201910A1 (de) |
| WO (1) | WO2015117603A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017121265B3 (de) | 2017-09-14 | 2019-01-17 | Schaeffler Technologies AG & Co. KG | Aktuator eines elektrohydraulischen Gaswechselventiltriebs mit einem zwei voneinander axialbeabstandete Ringauflageflächen aufweisenden Haltering |
| DE102019106465B4 (de) | 2018-05-08 | 2022-12-01 | Schaeffler Technologies AG & Co. KG | Aktuator eines hydraulisch variablen Gaswechselventiltriebs einer Brennkraftmaschine |
| JP7208099B2 (ja) * | 2019-04-25 | 2023-01-18 | 日立造船株式会社 | 監視システム |
| DE102019128826B4 (de) * | 2019-10-25 | 2022-09-29 | Schaeffler Technologies AG & Co. KG | Hydraulikeinheit einer elektrohydraulischen Gaswechselventilsteuerung |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3711436C1 (de) * | 1987-04-04 | 1988-07-21 | Goetze Ag | Montagevorrichtung fuer Ventilschaftabdichtungen |
| US5511460A (en) * | 1995-01-25 | 1996-04-30 | Diesel Engine Retarders, Inc. | Stroke limiter for hydraulic actuator pistons in compression release engine brakes |
| JP2001518587A (ja) * | 1997-08-28 | 2001-10-16 | ディーゼル エンジン リターダーズ,インコーポレイテッド | 油圧弁アクチュエータ |
| EP1036267A1 (de) * | 1997-11-04 | 2000-09-20 | Diesel Engine Retarders, Inc. | Ventiltrieb mit totgang |
| US6273057B1 (en) * | 1998-08-19 | 2001-08-14 | Diesel Engine Retarders, Inc. | Hydraulically-actuated fail-safe stroke-limiting piston |
| US6763790B2 (en) * | 1998-09-09 | 2004-07-20 | International Engine Intellectual Property Company, Llc | Poppet valve actuator |
| US6044815A (en) * | 1998-09-09 | 2000-04-04 | Navistar International Transportation Corp. | Hydraulically-assisted engine valve actuator |
| US6408812B1 (en) * | 2000-09-19 | 2002-06-25 | The Lubrizol Corporation | Method of operating spark-ignition four-stroke internal combustion engine |
| US6594996B2 (en) * | 2001-05-22 | 2003-07-22 | Diesel Engine Retarders, Inc | Method and system for engine braking in an internal combustion engine with exhaust pressure regulation and turbocharger control |
| JP2004527686A (ja) * | 2001-05-22 | 2004-09-09 | ディーゼル エンジン リターダーズ、インコーポレイテッド | 内燃エンジンにおけるエンジン・ブレーキの方法及びシステム |
| US6584885B2 (en) * | 2001-06-12 | 2003-07-01 | Visteon Global Technologies, Inc. | Variable lift actuator |
| US6957634B2 (en) * | 2002-10-04 | 2005-10-25 | Caterpillar Inc. | Engine valve actuator |
| US7318398B2 (en) | 2003-08-15 | 2008-01-15 | Caterpillar Inc. | Engine valve actuation system |
| DE102007030215A1 (de) * | 2007-06-29 | 2009-01-08 | Schaeffler Kg | Drosselventil für eine Brennkraftmaschine mit elektrohydraulischer Ventilsteuerung |
| CN102165149B (zh) * | 2008-07-31 | 2014-01-29 | Pac制动公司 | 内燃机的压缩释放制动系统的独立式压缩制动控制模块 |
| DE102010048135A1 (de) | 2010-10-11 | 2012-04-12 | Schaeffler Technologies Gmbh & Co. Kg | Aktuator eines elektrohydraulischen Gaswechselventiltriebs einer Brennkraftmaschine |
| DE102011004403A1 (de) * | 2011-02-18 | 2012-08-23 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulischer Ventiltrieb einer Brennkraftmaschine |
| FR2980515B1 (fr) * | 2011-09-26 | 2016-03-11 | Vianney Rabhi | Actionneur de soupape electro-hydraulique a came alternative |
-
2014
- 2014-02-04 DE DE102014201910.9A patent/DE102014201910A1/de not_active Withdrawn
-
2015
- 2015-01-20 US US15/113,957 patent/US9920664B2/en active Active
- 2015-01-20 WO PCT/DE2015/200006 patent/WO2015117603A1/de not_active Ceased
- 2015-01-20 CN CN201580007056.2A patent/CN105980669B/zh active Active
- 2015-01-20 KR KR1020167021322A patent/KR102296625B1/ko active Active
- 2015-01-20 EP EP15706143.3A patent/EP3102799B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US20160341080A1 (en) | 2016-11-24 |
| DE102014201910A1 (de) | 2015-08-06 |
| US9920664B2 (en) | 2018-03-20 |
| CN105980669A (zh) | 2016-09-28 |
| CN105980669B (zh) | 2018-09-14 |
| EP3102799B1 (de) | 2017-11-29 |
| KR20160117465A (ko) | 2016-10-10 |
| WO2015117603A1 (de) | 2015-08-13 |
| KR102296625B1 (ko) | 2021-09-02 |
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