EP0861970B1 - Vorrichtung für eine elektromagnetische Ventilsteuerung - Google Patents
Vorrichtung für eine elektromagnetische Ventilsteuerung Download PDFInfo
- Publication number
- EP0861970B1 EP0861970B1 EP98101234A EP98101234A EP0861970B1 EP 0861970 B1 EP0861970 B1 EP 0861970B1 EP 98101234 A EP98101234 A EP 98101234A EP 98101234 A EP98101234 A EP 98101234A EP 0861970 B1 EP0861970 B1 EP 0861970B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- accordance
- valve stem
- caps
- developed
- 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
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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
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
Definitions
- the invention relates to a device for an electromagnetic Valve control according to that in the preamble Art defined by claim 1.
- DE 33 07 070 C2 (or EP-A-0 722 039) describes an adjusting device for a gas exchange valve of an internal combustion engine is known.
- this control device is an electromagnet system arranged with switching magnets, with deenergized electromagnet system an anchor plate in in a neutral position.
- this oscillating spring-mass system with two springs, which are arranged on both sides of the anchor plate, available.
- the present invention is therefore based on the object based on a device for an electromagnetic To create valve control, when de-energized Electromagnet system a neutral position Switching element independent of a spring constant is present and in which the effort for the spring system is low.
- this task is characterized by Features mentioned in claim 1 solved.
- the spring plate in de-excited State of an electromagnet system at travel limitation devices is a precisely definable one and neutral independent of a spring constant Position of a valve lifter accessible.
- two embodiments are one Device for an electromagnetic valve control shown, which are arranged in a cylinder head and are basically of a known type, which is why only the essential for the invention Parts will be discussed in more detail.
- Valve tappet 2 with an anchor plate 3 and one Valve plate 4, which has a valve seat in the cylinder head 1 interacts, shown.
- the anchor plate 3 is at the end opposite the valve plate 4 of the valve lifter 2 connected to it.
- the valve lifter 2 is in the cylinder head 1 slidably arranged that the anchor plate 3 and thus the valve lifter 2 depending on the state of excitation of an electromagnet system 5 in a valve opening position or valve closed position maintained can be.
- valve lifter 2 In the de-energized state of the electromagnet system 5 the valve lifter 2 by means of a spring device 6 in held in a neutral position with the anchor plate 3 an approximately central position between two Switching magnet 7, 8 occupies.
- the anchor plate lies during the valve closing position 3 on the switching magnet 7. If the valve lifter 2 is in the valve opening position the armature plate 3 from the excited switching magnet 8 dressed and held in this position.
- the spring device 6 has between spring plates 10 and 11 as a resilient element, a coil spring 9a on, the spring plate 10, 11 relative to the valve lifter 2 slidably and coaxially arranged on this are.
- the valve lifter 2 is through central openings 12, 13 of the spring plate 10, 11 feasible.
- valve lifter 2 On the valve lifter 2 are each on the coil spring 9a facing away from the spring plate 10, 11th Driving devices 14, 15 for the spring plate 10, 11 arranged.
- the takeaways are as Ring elements 14, 15 formed, each of which an annulus 16, 17 and a cylindrical sleeve 18, 19 exist.
- the sockets 18, 19 have central ones Openings 20, 21 through which the valve tappet 2 is feasible for assembly.
- the inner lateral surfaces 22, 23 of the bushings 18, 19 are as contact surfaces on the valve lifter 2 and the outer lateral surfaces 24, 25 as guide surfaces for the spring plates 10, 11 formed.
- the webs 30, 31 can as in the embodiment shown over the entire outer diameter of the spring plate 10, 11 extend or segment-like only over a partial area the outer diameter of the spring plate 10, 11th extend.
- the two spring plates 10, 11 are in the de-energized state of the electromagnet system 5 just on path limiting devices 32, 33 and on the ring elements 14, 15 on, so that the valve lifter 2 in a subsequent Opening or closing the valve without delay be moved to the required position can.
- valve lifter 2 by means of the solenoid 7 brought into the closed position of the valve plate 4 the ring element 15 with the valve tappet 2 moved such that the ring member 15 the spring plate 11 lifts off the path limiting device 33 and compresses the resilient member 9a.
- the spring plate 10 is against the coil spring 9a Travel limiting device 32 pressed, and the ring element 14 lifts off the spring plate 10.
- the ring member 14th moved with the valve lifter 2 such that the ring element 14 the spring plate 10 from the travel limiting device 32 lifts off and compresses the coil spring 9a.
- the spring plate 11 is from the coil spring 9a pressed against the path limiting device 33, and the ring element 15 lifts off from the spring plate 11.
- the path limitation devices are in the present Embodiment as paragraphs 32, 33 in the cylinder head 1 trained and can in another not shown embodiment also by other suitable components such as stop elements, which are attached to the cylinder head 1 can be formed.
- the outer surface 24, 25, which coaxial to in the present embodiment an outer lateral surface 34 of the valve lifter 2 be conical. It becomes self-centering the spring plate 10, 11 on the ring elements 14, 15 reached.
- the coil spring 9a rests with its spring ends the inside of the valve stem 2 facing Webs 30, 31, whereby lateral guidance of the Coil spring 9a is guaranteed.
- the device is the resilient element as one pneumatic spring or air spring 9b formed.
- the air spring 9b is between the pistons 10, 11 trained spring plates and the cylinder head 1 arranged, being in the cylinder head 1 in the range between the pistons 10 and 11 a compressed air supply line 35 is provided, which the air spring 9b with compressed air provided.
- the cylindrical bushes 18, 19 are integral with the piston 10, 11 formed, being on the inner lateral surfaces 22, 23 a groove 36 is provided in each case, in which an O-ring 37 of a sealing device 38 is arranged.
- the ring elements 14, 15 lie with the each facing the associated piston 10, 11 Front side of the pistons 10, 11.
- the pistons 10, 11 are in the assembled state passed over the valve lifter 2 and slidable there arranged.
- the webs 30, 31 are formed on the pistons 10, 11 and the air spring on each of them 9b facing sides.
- the webs 30, 31 run over the entire outer diameter the pistons 10, 11 and 12 respectively on its outside 39 a groove 40 in which for Sealing on the cylinder head 1 or a valve housing an O-ring 41 of a sealing device 42 is provided is.
- the outer sides 39 of the webs 30, 31 serve on the one hand as guide surfaces of the pistons 10, 11 in the cylinder head 1 and on the other hand for recording the sealing device 42.
- the two pistons 10, 11 are de-energized of the electromagnet system 5 just at the path limiting devices 32, 33 and on the ring elements 14, 15 on.
- valve lifter 2 by means of the solenoid 7 brought into the closed position of the valve plate 4 the ring element 15 with the valve tappet 2 moved such that the ring member 15 the piston 11 from the path limiting device 33 and the Compress air spring 9b.
- the piston 10 is from the air spring 9b against the travel limiting device 32 pressed, and the ring member 14 lifts from the piston 10 from.
- the ring member 14th moved with the valve lifter 2 such that the ring element 14 the piston 10 from the travel limiting device 32 lifts off and compresses the air spring 9b.
- the piston 11 is from the air spring 9b to the travel limiting device 33 pressed, and the ring member 15 lifts off the piston 11.
- the path limiting device 33 is in the present Embodiment formed as a paragraph, which is provided in the cylinder head 1, and the Travel limiting device 32 is by the switching magnet 8 formed.
- the one for sealing the air spring 9b between the pistons 10, 11 and the valve lifter 2 and the cylinder head 1 arranged sealing devices 38, 42, have the O-rings in the present embodiment 37, 41 as a sealing body, but it goes without saying Others are at the discretion of the professional to use suitable sealing options, which two components slidably arranged relative to each other Seal against air or gas passage.
- the air spring 9b has compared to conventional coil springs Advantages, such as a negligible Spring mass and the possibility of the spring characteristic by varying the pressure or the spring volume to be able to change during operation. Because air springs generally have a progressive spring characteristic can have movements in particular be advantageously damped.
- the spring characteristic can be determined using a not shown control device as a function of Engine speed and engine load and other operating parameters the internal combustion engine or only under consideration one of the operating parameters is set be, thereby reducing fuel consumption and starting behavior of the motor vehicle can be improved.
- Another advantage of the air spring 9b is a small axial installation space, which saves weight enables and thus also fuel consumption lowers.
- the valve control also has a low level static mass, which means shorter response times Control device can be realized.
- valve If the valve is switched off, or in closing or in It is possible to leave it in the open position to vent the air spring 9b. That means the pressure between the pistons 10, 11 is degraded, with which the holding current of the switching magnets 7, 8 and the energy consumption lets lower.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Description
- Fig. 1
- eine Vorrichtung für eine elektromagnetische Ventilsteuerung mit einer Federeinrichtung, welche ein federndes Element aufweist, das als eine Schraubenfeder ausgebildet ist;
- Fig. 2
- ein weiteres Ausführungsbeispiel der Vorrichtung in geöffneter Stellung, wobei ein federndes Element als eine Luftfeder ausgebildet ist;
- Fig. 3
- die Vorrichtung gemäß Fig. 2 in neutraler Stellung; und
- Fig. 4
- die Vorrichtung gemäß Fig. 2 und Fig. 3 in geschlossener Stellung.
Claims (12)
- Vorrichtung für eine elektromagnetische Ventilsteuerung, wobei eine zwischen zwei Endstellungen verstellbare Ankerplatte, welche von einem Elektromagnet-System mit Schaltmagneten in den Endstellungen gehalten ist, mit einem Ventilstößel verbunden ist, und wobei an dem Ventilstößel eine Federeinrichtung mit einem federnden Element derart vorgesehen ist, daß die Ankerplatte bei nicht erregtem Elektromagnet-System eine annähernd mittlere Position zwischen den beiden Schaltmagneten einnimmt,
dadurch gekennzeichnet, daß
das federnde Element (9a,9b) zwischen zwei Federtellern (10,11) angeordnet ist, die Öffnungen (12,13) aufweisen, daß der Ventilstößel (2) und die Federteller (10,11) relativ zueinander verschiebbar angeordnet sind, und daß auf der dem federnden Element (9a,9b) abgewandten Seite der Federteller (10,11) jeweils eine Mitnahmeeinrichtung (14,15) an dem Ventilstößel (2) und jeweils eine Wegbegrenzungseinrichtung (32,33) für die Federteller (10, 11) vorgesehen ist. - Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß
der Ventilstößel (2) mit zwei Mitnahmeeinrichtungen (14,15) versehen ist, welche jeweils auf der dem federnden Element (9a,9b) abgewandten Seite der Federteller (10,11) einen Anschlag für den dazugehörigen Federteller (10,11) bilden. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß
die Mitnahmeeinrichtungen als Ringelemente (14,15) ausgebildet sind, welche Öffnungen (20,21) aufweisen, durch die der Ventilstößel (2) führbar ist, wobei an den Öffnungen (20,21) jeweils eine Buchse (18,19) ausgebildet ist, deren Innenmantelflächen (22,23) als Anlagefläche an dem Ventilstößel (2) und deren Außenmantelflächen (24,25) als Führungsfläche für die Federteller (10,11) ausgebildet ist. - Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß
an den Innenmantelflächen (22,23) der Ringelemente (14,15) Auswölbungen bzw. Nippel (26,27) vorgesehen sind, welche in Nuten (28,29) des Ventilstößels (2) einpaßbar sind. - Vorrichtung nach Anspruch 3 oder 4,
dadurch gekennzeichnet, daß
die Außenmantelflächen (24,25) der Buchsen (18,19) kegelförmig ausgebildet sind. - Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß
die Federteller (10,11) jeweils einen sich wenigstens über einen Teilbereich ihrer äußeren Durchmessern erstreckenden Steg (30,31) aufweisen. - Vorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß
die Wegbegrenzungseinrichtungen als Absätze (32,33) in einem Zylinderkopf (1) ausgebildet sind. - Vorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß
das federnde Element als eine Schraubenfeder (9a) ausgebildet ist. - Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet, daß
die Schraubenfeder (9a) an der der Schraubenfeder (9a) zugewandten Seite der Federteller (10,11) und an den Innenseiten der Stege (30,31) anliegt. - Vorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß
das federnde Element als eine pneumatische Feder (9b) und die Federteller als Kolben (10,11) ausgebildet sind. - Vorrichtung nach Anspruch 10,
dadurch gekennzeichnet, daß
in dem Zylinderkopf (1) im Bereich zwischen den Federtellern (10,11) eine Druckluftzuleitung (35) vorgesehen ist. - Vorrichtung nach Anspruch 10 oder 11,
dadurch gekennzeichnet, daß
zwischen den Federtellern (10,11) und dem Ventilstößel (2) sowie dem Zylinderkopf (1) jeweils eine Dichtungseinrichtung (38,42) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19707810A DE19707810C1 (de) | 1997-02-27 | 1997-02-27 | Vorrichtung für eine elektromagnetische Ventilsteuerung |
| DE19707810 | 1997-02-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0861970A1 EP0861970A1 (de) | 1998-09-02 |
| EP0861970B1 true EP0861970B1 (de) | 2001-06-06 |
Family
ID=7821618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98101234A Expired - Lifetime EP0861970B1 (de) | 1997-02-27 | 1998-01-24 | Vorrichtung für eine elektromagnetische Ventilsteuerung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6062181A (de) |
| EP (1) | EP0861970B1 (de) |
| DE (2) | DE19707810C1 (de) |
| ES (1) | ES2159413T3 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19725010C1 (de) * | 1997-06-13 | 1998-10-29 | Daimler Benz Ag | Vorrichtung zur Betätigung eines Gaswechselventils mit einem elektromagnetischen Aktuator |
| FR2783631B1 (fr) * | 1998-09-18 | 2000-11-24 | Sagem | Actionneur electromagnetique, notamment pour soupape |
| DE10008991A1 (de) * | 2000-02-25 | 2001-08-30 | Bayerische Motoren Werke Ag | Gaswechselventil-Steuerung für Brennkraftmaschinen mit einem mit Gasfedern ausgerüsteten elektromagnetischen Aktuator |
| US7603858B2 (en) * | 2007-05-11 | 2009-10-20 | Lawrence Livermore National Security, Llc | Harmonic engine |
| US8807012B1 (en) | 2010-08-30 | 2014-08-19 | Lawrence Livermore National Security, Llc | Harmonic engine |
| US9291056B2 (en) | 2010-08-30 | 2016-03-22 | Lawrence Livermore National Security, Llc | Harmonic uniflow engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307070C2 (de) * | 1983-03-01 | 1985-11-28 | FEV Forschungsgesellschaft für Energietechnik und Verbrennungsmotoren mbH, 5100 Aachen | Stelleinrichtung für ein zwischen zwei Endstellungen verstellbares Schaltelement |
| DE3616540A1 (de) * | 1986-05-16 | 1987-11-19 | Porsche Ag | Vorrichtung zum betaetigen eines gaswechsel-tellerventils einer hubkolben-brennkraftmaschine |
| JP3106890B2 (ja) * | 1995-01-11 | 2000-11-06 | トヨタ自動車株式会社 | 内燃機関の弁駆動装置 |
-
1997
- 1997-02-27 DE DE19707810A patent/DE19707810C1/de not_active Expired - Fee Related
-
1998
- 1998-01-24 ES ES98101234T patent/ES2159413T3/es not_active Expired - Lifetime
- 1998-01-24 DE DE59800812T patent/DE59800812D1/de not_active Expired - Fee Related
- 1998-01-24 EP EP98101234A patent/EP0861970B1/de not_active Expired - Lifetime
- 1998-02-27 US US09/031,741 patent/US6062181A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59800812D1 (de) | 2001-07-12 |
| US6062181A (en) | 2000-05-16 |
| ES2159413T3 (es) | 2001-10-01 |
| EP0861970A1 (de) | 1998-09-02 |
| DE19707810C1 (de) | 1998-05-07 |
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