EP1367231B1 - Ventilhubsteuerung für Verbrennungsmotoren von Kraftfahrzeugen - Google Patents
Ventilhubsteuerung für Verbrennungsmotoren von Kraftfahrzeugen Download PDFInfo
- Publication number
- EP1367231B1 EP1367231B1 EP03009499A EP03009499A EP1367231B1 EP 1367231 B1 EP1367231 B1 EP 1367231B1 EP 03009499 A EP03009499 A EP 03009499A EP 03009499 A EP03009499 A EP 03009499A EP 1367231 B1 EP1367231 B1 EP 1367231B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- valve
- valve lift
- hydraulic medium
- hollow piston
- 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.)
- Expired - Lifetime
Links
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
- F01L13/0005—Deactivating valves
-
- 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
- F01L1/143—Tappets; Push rods for use with overhead camshafts
-
- 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
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- 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
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0031—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of tappet or pushrod length
-
- 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
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
Definitions
- the invention relates to a valve lift control for internal combustion engines of Motor vehicles according to the preamble of claim 1.
- valve lift controls are valves of an internal combustion engine of Cars only so far open that for the respective power requirement of the engine, the corresponding amount of fuel in the combustion chamber is injected.
- the control shaft acts on an actuating element in the form of a Levers acting on the valve stem. This mechanical control is susceptible to interference and does not allow precise adjustment of the valve lift.
- EP-A-0 814 240 there is the Control device of two intermeshing reciprocating pistons, which together to limit a cavity to be connected to a hydraulic medium source.
- the one hollow piston is axially immovable in the motor housing, however rotatably mounted about its axis.
- staggered openings which can be closed by the inner hollow piston. He is with one arm of a two-armed rocker arm connected to the other Arm the shaft of an intake valve attacks.
- the rocker arm is centered provided with a roller on which a cam of a camshaft is supported.
- FR-A-2 724 975 It is also known (FR-A-2 724 975) for stroke control of an intake valve to steer a control unit at one end of a two-armed rocker arm.
- the control unit can be vertical by a cam of a control shaft be moved to the pivot axis of the tilt bracket.
- In a raised Position can be a standing under the pressure of a hydraulic medium Piston arranged in the control unit locking bolt partially against spring force in a housing-fixed locking opening move.
- the control unit is thereby locked in an upper position in the housing, so that the camshaft on the tilt bracket of the intake valve over a larger Stroke can be adjusted.
- the invention is based on the object, the generic Ventilhub tenuung form so that the valve in a structurally simple Can be set accurately and reliably.
- the control device hydraulically operated.
- the control device can easily with the necessary Hydraulic medium to be supplied.
- the hub the valve can be adjusted easily and accurately.
- FIG. 1 shows a cylinder head 1 of an internal combustion engine, in which, depending on the type of engine a different Number of combustion chambers and associated valves 2 is provided is.
- a valve plate 3 has, closed with the one inlet opening 4 in the combustion chamber can be.
- the valve plate 3 is seated at the end of a valve stem 5, against the force of at least one compression spring 6 in a Open position can be moved.
- the valve stem 5 indicates his the valve plate 3 opposite end of a spring plate 7, on which one end of the compression spring 6 is supported. you the other end is supported on the cylinder head side.
- valve plate 3 This will be the Valve plate 3 by the compression spring 6 in his in Fig. 1 shown Closed position pulled.
- the projecting beyond the spring plate 7 end 8 the valve stem 5 is formed dome-shaped and lies in one pan-like receptacle 9 at the free end of an arm 10 of a He is being transposed to his two-armed rocker arm Swivel axis in a fork 12 position secured, the cylinder head 1 is provided.
- the other arm 13 of the rocker arm 11 is located on a Adjusting cylinder 14, which in a bore 15 in the cylinder head. 1 is slidably mounted.
- the actuating cylinder 14 takes a hollow piston 16, which bears against a cam 17 of a control shaft 18.
- the hollow piston 16 receives at least one compression spring 19, which is with one end to a bottom 20 of the hollow piston 16 and with her other end on a bottom 21 of the adjusting cylinder 14 is supported.
- the hollow piston 16 is always loaded by the compression spring 19 so that he with his bottom 20 on a cam 22 of the cam 17 of the Control shaft 18 is present.
- the hollow piston 16 is sealed in the actuating cylinder 14 slidably guided. Since the hollow piston 16, the compression spring 19 receives, results in a very compact design.
- the part 16 also be solid. Then, because of the compression spring 19, the between the end face of the part 16 and the bottom 21 of the adjusting cylinder 14 is given a greater length of the control device.
- the actuating cylinder 14 is over part of its length by an annulus Surrounded 23, which is provided in the cylinder head 1 and in the a bore 24 opens.
- the annular space 23 is replaced by a in Diameter extended portion of the bore 15 formed.
- the actuating cylinder 14 has a small distance from its bottom 21 arranged in its cylinder wall 25 distributed over the circumference Passageways 26, preferably bores, over which the annulus 23 is connected to the interior 27 of the adjusting cylinder 14.
- the two ends of the lever arms 10, 13 are in the direction of the Valve stem 5 and the actuating cylinder 14 angled.
- On the other Side of the rocker arm 11 is provided with an increase 28, which is extends over most of the length of the rocker arm 11 and at a camshaft 29 abuts. With her, the rocker arm 11 in pivoted yet to be described manner to open the valve 2.
- the rocker arm 11 is not fixed, but lies with the ends his arms 10, 13 on the valve stem 5 and the adjusting cylinder 14 at.
- Fig. 1 shows the initial position of the valve lift control, in a Cam 30 of the camshaft 29 is not engaged with the rocker arm 11 is.
- the control shaft 18 is rotated to a position in which a touch area 31 between the cam 22 and the bottom 20 of the Hollow piston 16 the largest distance to the axis 32 of the control shaft 18 has.
- the valve 2 is closed.
- the hollow piston 16 is spaced from the bottom 21 of the actuating cylinder 14, whose Holes 26, the annular space 23 with the interior 27 of the actuating cylinder 14 and with the interior 33 of the hollow piston 16 connect.
- Fig. 4 shows the maximum valve lift. He is reached when the Camshaft 29 is rotated so far that the cam 30 in the direction of the rocker arm 11 protrudes furthest. In this position (FIG. 4) the rocker arm 11 is pivoted furthest counterclockwise, so that the valve stem 5 is moved furthest. The valve 2 has thus executed the largest stroke. The valve plate 3 is farthest from his valve seat.
- the force of the compression spring 19 in the actuating cylinder 14 is significantly smaller than the force of the compression spring 6, with which the valve 2 is loaded.
- the Force of the compression spring 19 is in any case so large that a safe Applying the adjusting cylinder 14 and the hollow piston 16 am Rocker arm 11 and the control cam 22 of the control shaft 18 ensures is.
- the running clearance between the hollow piston 16 and the actuating cylinder 14th is so low that a sealing function is present.
- the hydraulic medium therefore does not escape to the outside, so that leakage losses avoided or only negligibly small.
- a lever 11 with the corresponding valve lift control provided on the control shaft
- 18 can have several or just one tax path 22 lie.
- valve lift can be changed. Of the Valve lift can be adjusted so that in the respective combustion chamber only as much fuel is injected as for the current one Power of the internal combustion engine is needed.
- FIGS. 5 and 6 show the case that the hollow piston 16 from the axis 32 of the control shaft 18 the has the smallest distance.
- the control shaft 18 is for this purpose from the position As shown in FIGS. 1 to 4 has been rotated clockwise until the Control shaft 5 has reached the position shown in FIGS. 5 and 6.
- the Hollow piston 16 is located with its bottom 20 under the force of the compression spring 19 on the control cam 22 of the cam 17 of the control shaft 18 at.
- the hollow piston 16 is pushed out so far from the adjusting cylinder 14, that the end face 35 of the hollow piston 16 in the area below the holes 26 in the cylinder wall 25 of the adjusting cylinder 14th lies.
- the inner spaces 27, 33 of the adjusting cylinder 14 and the hollow piston 16 are thus connected to the annular space 23 and the bore 24.
- the actuating cylinder 14 and the hollow piston 16 act in the described manner as a fixed bearing for the rocker arm 11. Due the large displacement of the actuating cylinder 14 is the rocker arm 11 in the clockwise direction very far. As a consequence, that by turning the camshaft 29, the valve 2 is not opened becomes. As shown in FIG. 6, the cam 30 of the camshaft 29 takes its maximum stroke position, without the rocker arm 11 is pivoted so is that the valve 2 is opened. By means of the control shaft 18 can Thus, a zero stroke of the valve 2 can be achieved.
- Fig. 7 shows that the position of the camshaft 29 and control shaft 18th can be reversed.
- the hollow piston 16 is located on the increase 28 of the rocker arm 11 under the force of the compression spring 19. With the bent end of his arm 13 of the rocker arm 11 is located on the camshaft 29 at.
- the actuating cylinder 14 is located on the control cam 22 of the cam 17 of the Control shaft 18 on. It is rotated so that the actuating cylinder 14 the smallest distance from the axis 32 of the control shaft 18 has.
- the End face 35 of the hollow piston 16 is spaced from the holes 26 in the cylinder wall 25 of the adjusting cylinder 14.
- the holes 26, which closely adjacent to the previous embodiment are provided to the bottom of the adjusting cylinder 14, thus not closed by the hollow piston 16.
- the hydraulic medium can from the bore 24 into the annular space 23 and from there via the holes 26 in the interiors 27 and 33 of the adjusting cylinder 14th and the hollow piston 16 arrive.
- This position of the hollow piston 16 is corresponding to the previous Embodiment already achieved when the cam 30 of the Camshaft 29 is not yet in its maximum Verstellage, in which the cam 30, based on the position shown in FIG. 7, is located on the diametrically opposite side of the camshaft 29.
- the rocker arm 11 during further rotation of the camshaft 29 tilted counterclockwise, causing the valve stem 5 displaced against the force of the compression spring 6 and thus the valve 2 is opened.
- valve 2 closes again, by the valve stem 5 via the spring plate 7 of the compression spring 6 is pushed back.
- the rocker arm 11 is in this case in a clockwise direction tilted.
- the Cam 30 of the camshaft 29 again in such a position that the Compression spring 19 the hollow piston 16 pushes back while the rocker arm 11 leads back to the starting position according to FIG. 7.
- the holes 26 releases in the actuating cylinder 14, the Hydraulic medium sucked from the bore 24.
- the control shaft 18 turned. Depending on the rotational position of the control shaft 18 and its cam 17, the stroke of the valve 2 is variably changed. This will achieve that the fuel only in such an amount in the combustion chamber of the internal combustion engine is sprayed, as for the respective Power of the internal combustion engine is necessary.
- the hydraulic medium used for the operation of the control device 14, 16 is necessary, can also be in a preloaded memory are located. Are the hollow piston 16, the holes 26 in the actuating cylinder 14 free, the hydraulic medium from the preloaded memory. sucked. Conversely, the hydraulic medium can shrink when zooming of the interior 27, 33 of the control device 14, 16 in the memory be displaced.
- the circuit of the hydraulic medium with the preloaded memory can be self-contained. But it is also possible, the preloaded memory via a check valve with the engine oil circuit to connect and feed about him. This will in particular achieved a leakage compensation.
Description
- Fig. 1 bis Fig. 6
- verschiedene Stellungen einer erfindungsgemäßen Ventilhubsteuerung bei oben liegender Nockenwelle,
- Fig. 7
- eine zweite Ausführungsform einer erfindungsgemäßen Ventilhubsteuerung bei unten liegender Nockenwelle.
Claims (11)
- Ventilsteuerung für Verbrennungsmotoren von Kraftfahrzeugen, mit mindestens einer zur Einstellung des Hubes von Ventilen (2) vorgesehenen Steuereinrichtung (14, 16), mit der wenigstens eine Nockenwelle (29) und mindestens ein Steuerteil (18) zusammenwirken, wobei die Steuereinrichtung (14, 16) durch Hydraulikmedium betätigbar ist und zwei relativ zueinander gegen die Kraft wenigstens eines Federelementes (19) verschiebbare und bewegbare Steuerelemente (14 und 16) aufweist, deren eines Steuerelement (14) hülsenförmig ausgebildet ist, das das andere Steuerelement (16) aufnimmt, das als Hohlkolben ausgebildet ist, und die beiden Steuerelemente (14 und 16) einen gemeinsamen, mit einer Hydraulikmedium-Quelle verbindbaren Hohlraum (27, 33) begrenzen, in dem sich Hydraulikmedium befindet, wobei das eine Steuerelement (14) wenigstens eine Verbindung (26) aufweist, über die das Hydraulikmedium in und aus dem Hohlraum (27, 33) gelangen kann und die durch das andere Steuerelement (16) verschließbar ist, wobei das eine Steuerelement (14) an einem auf einem Ventilschaft (5) des Ventils (2) wirkenden, vorzugsweise zweiarmigen Kipphebel (11) abgestützt ist und das andere Steuerelement (16) mit dem Steuerteil (18) zusammenwirkt,
dadurch gekennzeichnet, daß das Steuerteil (18) eine Steuerwelle mit einem Nocken (17) ist, an deren Steuerkurve (22) das andere Steuerelement (16) unter der Kraft des Federelementes (19) mit seinem Boden (20) stetig anliegt. - Ventilhubsteuerung, insbesondere nach Anspruch 1,
dadurch gekennzeichnet, daß der Kipphebel (11) schwimmend gelagert ist. - Ventilhubsteuerung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das eine Steuerelement (14) an einem Hebelarm (13) und der Ventilschaft (5) am anderen Hebelarm (10) des Kipphebels (11) angreift. - Ventilhubsteuerung nach Anspruch 3,
dadurch gekennzeichnet, daß der Ventilschaft (5) mit einem kalottenförmigen Ende (8) in eine gelenkpfannenartige Aufnahme (9) des Kipphebels (11) eingreift. - Ventilhubsteuerung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Nockenwelle (29) am Kipphebel (11) etwa in dessen halber Länge angreift. - Ventilhubsteuerung nach einem der Ansprüche 1, 2 und 4,
dadurch gekennzeichnet, daß die Nockenwelle (29) am einen Hebelarm (13) des Kipphebels (11) und das andere Steuerelement (16) etwa in dessen halber Länge angreift. - Ventilhubsteuerung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Steuereinrichtung (14, 16) bei verschlossener Verbindung (26) des einen Steuerelementes (14) ein Festlager für den Kipphebel (11) bildet. - Ventilhubsteuerung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die beiden Steuerelemente (14, 16) durch die Nockenwelle (29) relativ zueinander verstellbar sind. - Ventilhubsteuerung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß die Kraft der Feder (19) der beiden Steuerelemente (14, 16) kleiner ist als die Kraft einer das Ventil (2) in die Schließstellung belastenden Feder (6). - Ventilhubsteuerung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß das Hydraulikmedium dem Motorölkreislauf entnehmbar ist. - Ventilhubsteuerung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß das Hydraulikmedium einem Speicher entnehmbar ist, der vorteilhaft in einem eigenen Hydraulikmedium-Kreislauf liegt und vorzugsweise über ein Rückschlagventil an den Motorölkreislauf angeschlossen ist und vom Motorölkreislauf gespeist wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10220692A DE10220692A1 (de) | 2002-05-10 | 2002-05-10 | Ventilhubsteuerung für Verbrennungsmotoren von Kraftfahrzeugen |
DE10220692 | 2002-05-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1367231A1 EP1367231A1 (de) | 2003-12-03 |
EP1367231B1 true EP1367231B1 (de) | 2005-04-20 |
Family
ID=29265182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03009499A Expired - Lifetime EP1367231B1 (de) | 2002-05-10 | 2003-04-28 | Ventilhubsteuerung für Verbrennungsmotoren von Kraftfahrzeugen |
Country Status (4)
Country | Link |
---|---|
US (1) | US6779497B2 (de) |
EP (1) | EP1367231B1 (de) |
DE (2) | DE10220692A1 (de) |
ES (1) | ES2242120T3 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7012315B1 (en) * | 2000-11-01 | 2006-03-14 | Micron Technology, Inc. | Frame scale package using contact lines through the elements |
US7401584B2 (en) * | 2004-07-01 | 2008-07-22 | Schaeffler Kg | Adjustable engine |
DE102004060433A1 (de) * | 2004-12-14 | 2006-07-06 | Daimlerchrysler Ag | Nockenfolger zur Betätigung eines Gaswechselventiles einer Brennkraftmaschine |
DE102006007121A1 (de) * | 2006-02-16 | 2007-08-23 | Daimlerchrysler Ag | Gaswechselventilbetätigungsvorrichtung |
CN101225759B (zh) * | 2008-01-25 | 2010-06-09 | 许小法 | 可变气门升程装置 |
CN102979589B (zh) * | 2011-09-06 | 2015-05-20 | 北汽福田汽车股份有限公司 | 发动机配气机构、发动机及汽车 |
DE102011114588A1 (de) * | 2011-09-30 | 2013-04-04 | Thyssenkrupp Presta Teccenter Ag | Ventiltrieb für Brennkraftmaschinen mit verstellbarer Nockenwelle |
JP6036757B2 (ja) * | 2014-07-16 | 2016-11-30 | トヨタ自動車株式会社 | 内燃機関の可変動弁機構 |
EP3000996B1 (de) * | 2014-09-23 | 2017-05-10 | FPT Motorenforschung AG | Zusätzliche Befehlsanordnung zur Steuerung der Öffnung/Schließung der Kopfventile in einem Verbrennungsmotor, insbesondere für den Betrieb einer Dekompressions-Motorbremse |
CN110374707A (zh) * | 2019-06-19 | 2019-10-25 | 浙江吉利控股集团有限公司 | 一种连续可变升程装置、发动机及汽车 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2825316A1 (de) * | 1978-06-09 | 1979-12-20 | Maschf Augsburg Nuernberg Ag | Regelbare hydraulische ventilsteuerung fuer hubkolbenkraft- oder arbeitsmaschinen |
JPS59201911A (ja) * | 1983-04-28 | 1984-11-15 | Mazda Motor Corp | エンジンの弁不作動装置 |
JPS60116809A (ja) * | 1983-11-25 | 1985-06-24 | Mazda Motor Corp | エンジンの弁不作動装置 |
JP2750800B2 (ja) * | 1992-12-24 | 1998-05-13 | 株式会社ユニシアジェックス | 内燃機関の吸気弁制御装置 |
FR2724975B1 (fr) * | 1994-09-27 | 1996-12-20 | Peugeot | Dispositif pour l'actionnement d'au moins une soupape de moteur a combustion interne |
US5570665A (en) * | 1995-04-04 | 1996-11-05 | Chrysler Corporation | Valve train for internal combustion engine |
US5829397A (en) * | 1995-08-08 | 1998-11-03 | Diesel Engine Retarders, Inc. | System and method for controlling the amount of lost motion between an engine valve and a valve actuation means |
GB9612178D0 (en) * | 1996-06-11 | 1996-08-14 | Ricardo Consulating Engineers | Hydraulic tappets |
US6293237B1 (en) * | 1997-12-11 | 2001-09-25 | Diesel Engine Retarders, Inc. | Variable lost motion valve actuator and method |
-
2002
- 2002-05-10 DE DE10220692A patent/DE10220692A1/de not_active Withdrawn
-
2003
- 2003-04-28 DE DE50300451T patent/DE50300451D1/de not_active Expired - Lifetime
- 2003-04-28 ES ES03009499T patent/ES2242120T3/es not_active Expired - Lifetime
- 2003-04-28 EP EP03009499A patent/EP1367231B1/de not_active Expired - Lifetime
- 2003-05-09 US US10/249,805 patent/US6779497B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6779497B2 (en) | 2004-08-24 |
DE50300451D1 (de) | 2005-05-25 |
US20030209215A1 (en) | 2003-11-13 |
DE10220692A1 (de) | 2003-11-20 |
ES2242120T3 (es) | 2005-11-01 |
EP1367231A1 (de) | 2003-12-03 |
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