EP0964147B1 - Abgasrückführventil für Brennkraftmaschinen - Google Patents
Abgasrückführventil für Brennkraftmaschinen Download PDFInfo
- Publication number
- EP0964147B1 EP0964147B1 EP99110259A EP99110259A EP0964147B1 EP 0964147 B1 EP0964147 B1 EP 0964147B1 EP 99110259 A EP99110259 A EP 99110259A EP 99110259 A EP99110259 A EP 99110259A EP 0964147 B1 EP0964147 B1 EP 0964147B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- gas recirculation
- valve
- valve according
- valve seat
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 239000007788 liquid Substances 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000035508 accumulation Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/66—Lift valves, e.g. poppet valves
- F02M26/68—Closing members; Valve seats; Flow passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
Definitions
- valve member designed as a valve plate
- the outer edge in an annular collar same cross section that passes in one of the valve seat surface of the Axially projecting away from the housing part and on the outer Circumferential surface in the arc area is the ring surface acting as a sealing surface having.
- This sealing surface is approximately quarter-circular in cross-section a correspondingly arcuate valve seat surface in one in the Assigned part of the valve seat used.
- the valve seat consists of a Ring, the associated on the inner peripheral surface, in cross section has quarter-circle-shaped valve seat.
- the plate-shaped valve member moves with the outer ring surface in Axial direction away from the inner peripheral surface of the valve seat.
- the Closing movement of the valve moves the valve member axially in the direction the valve seat, whereby the closed position is reached when the in Cross-section quarter-circular outer peripheral surface of the valve plate in surface contact with the corresponding inner peripheral surface of the Valve seat arrives, the outer annular surface of the valve member having a positive fit is received in the inner peripheral surface of the valve seat.
- Exhaust gas recirculation valves for internal combustion engines are also known (DE 196 07 810 A1), in which the valve member from below for closing the Valve passage is created against the valve seat surface.
- the valve member is seated usually at the end of an actuator in the form of a rod, one Ram, a shaft or the like, on which an actuator, preferably e.g. on electric actuator for actuating the valve element in the opening direction or closing direction attacks.
- an actuator preferably e.g. on electric actuator for actuating the valve element in the opening direction or closing direction attacks.
- a Electric motor a stepper motor, an electric rotary magnet or the like. electromagnetic turntable may be provided.
- the valve seat surface is approximately frustoconical in shape tapered inclined surface in a plate-shaped upper part of the housing part educated.
- the valve member is designed as a flat plate, of which the Valve seat surface associated ring surface also as approximately frustoconical tapered inclined surface is formed. In the closed position of the Valve are the valve member side ring surface and the valve seat surface of the Valve passages on top of each other.
- exhaust gas recirculation valves of the type mentioned arise in particular in connection with the exhaust gas cooling and when cooling this in the area between the valve surfaces sitting on top of each other thereby problems that at low temperatures on the valve member and on the valve passage adjacent Areas of the housing part liquid, condensate and / or Collect particles that harden when cooled and that valve surfaces sitting on top of each other, for example similar to adhesive can stick together, creating a reliable subsequent opening function and another one at all reliable operation of the exhaust gas recirculation valve is at risk becomes or becomes impossible.
- the invention has for its object an exhaust gas recirculation valve of the type mentioned at the beginning that a perfect opening or closing function guaranteed between the valve member and the valve seat is.
- the at least one top recording on Valve member which is provided there recessed, forms a Reservoir for any liquid, condensate and / or particles in this at least one recording get in, e.g. can flow in, so that these thereby in a particularly simple manner from the ring surface of the valve member and / or the valve seat surface of the Housing part are kept away.
- Fig. 1 is only schematically the one of interest here Part of an otherwise at least essentially known Exhaust gas recirculation valve 10 shown for exhaust gas recirculation determined in internal combustion engines and e.g. into an intake manifold the internal combustion engine is installed. It points a lower housing part 11, on which no further Exhaust gas recirculation line shown, illustrated by the Arrow 12 is fed.
- the housing part 11 contains one Valve passage 13 with an annular valve seat surface 14, which cooperates with an associated valve member 15, the one of the valve seat surface 14 associated ring surface 16 having.
- the valve member 15 is in a conventional manner as is not shown further, at the lower end of an actuator in the form of a rod, a plunger, a shaft od.dergl.
- an actuator on this actuator attacks e.g. in the form of an electric actuator, e.g. from an electric motor or stepper motor or rotary magnets or the like. can exist.
- the annular surface 16 of the valve member 15 is axial on one protruding collar 40 of the valve member 15 is formed, which is arranged on the top of the valve member 15.
- valve seat surface 14 is on the lower side of the Housing part 11 arranged, the bottom and in Direction of valve seat surface 14 in the direction of arrow 12 the exhaust gas can be supplied.
- the valve member 15 is on the Bottom of the housing part 11 arranged and from below against the valve seat surface 14 to bring about the in Fig. 1 shown closed position can be applied.
- valve seat surface 14 on the underside is an inclined surface 44 formed, which face away from the valve member 15 Axial direction tapered approximately frustoconical.
- the ring surface 16 formed on the upper side of the ring collar 40 of the valve member 15 is also an inclined surface 46 formed in the valve seat 14 facing Axial direction tapered approximately frustoconical.
- the taper angle of the inclined surfaces 44 and 46 is according to FIG. 1 and 2 are of equal size and are of the order of magnitude about 120 °.
- FIG. 2 reveals, closes the annular surface 16, in particular in the training as an inclined surface 46, the collar 40 with their outside diameter and also with their inside diameter each essentially with the corresponding outer diameter or inner diameter of the inclined surface 44 Valve seat 14 from.
- the projecting collar 40 is radially outside of one to the longitudinal center axis 9 approximately coaxial outer cylinder surface 48 limited.
- valve seat surface 14 designed as an inclined surface 44 is approximately radially inward from one to the longitudinal central axis 9 limited coaxial inner cylinder surface 47 which the Valve passage 13 surrounds and defines.
- valve seat surface 14 of the housing part 11 is on one relatively thin in cross section, approximately disc-shaped Head area 49 of the housing part 11 is formed.
- valve seat surface 14 designed as an inclined surface 44 adjoins an annular surface 45 radially on the outside lies within a radial plane that is approximately rectangular is aligned with the longitudinal central axis 9.
- the top of the Head area 49 is through a to this annular surface 45th approximately parallel head surface 50 limited.
- the valve body 15 has on the valve seat surface 14 facing top 51 one or more recessed open, upwardly open receptacles 52 as collecting spaces, in which there is liquid, condensate and / or particles can collect, especially when the exhaust gas recirculation valve cools down 10 from the exhaust gas, in particular from diesel exhaust gas, can fail.
- the at least one receptacle 52 takes such particles, liquids or the like. on, so that these from the inclined surfaces interacting 44 and 46 should be kept as far as possible.
- FIGS. 1 and 2 has the valve body 15 on the upper side as recessed Receptacle 52 at least one recessed annular groove, which e.g. has a width of about 2 mm to 3 mm and the radially outside through the axially projecting ring collar 40 is limited.
- Radially inside connects to the least a top receptacle 52, in particular an annular groove, one for Longitudinal central axis 9 rising conical surface 53, the approximately frustoconical in the direction of the valve seat surface 14 tapered and axially over the collar 40 and the Ring surface 16 also protrudes upwards.
- the axial projection dimension the conical surface 53 lies e.g. in the order of magnitude of 2 mm.
- This configuration of the exhaust gas recirculation valve 10 according to 1 and 2 is a flawless with simple means Closing function or opening function between the valve seat surface 14 and the valve member 15 ensures that an accumulation of particles, liquid, condensate or the like, which fail during cooling from the exhaust gas, in Area of the inclined surfaces 44 and 46 acting with one another as far as possible is excluded.
- FIG. 3 are in the second embodiment for the parts that correspond to the first exemplary embodiment in FIG. 1 and 2 correspond to the same reference numerals, so that thereby avoiding repetitions on the Description of the first embodiment referred is.
- valve seat surface 14 is designed as a flat surface, which are within a to the longitudinal central axis of the valve passage 13 extends approximately rectangular radial plane.
- the cutting edge 60 is radially outward from that to the longitudinal central axis the valve passage 13 approximately coaxial outer Cylinder surface 48 and radially inward from an inner bevel surface 61 that defines itself with the formation of the cutting edge 60 in the ring surface 16, which presents itself as a ring line to meet.
- the inner inclined surface 61 tapers in the Axial direction approximately frustoconical, that of the flat valve seat 14 is turned away. Also in this embodiment has the valve member 15 as in the first embodiment at least one recessed top, upward open image corresponding to the image 52 on.
- the cutting edge 60 is the size in the closed position 3 in contact with each other Areas kept as small as possible so that any particles, liquids, condensate sticking in between or the like, which, when cured, is about sticking together could result in contact surfaces, practically none Have area approach.
- a sharp tear-off edge radially inward in the form of the inner inclined surface 61 and radially outward in the form of the outer cylinder surface 48 created by tearing off any accumulations is promoted. Due to the training as a cutting edge 60 this, moreover, during the transfer of the valve member 15 any accumulations in the closed position according to FIG. 3, that should adhere to the valve seat surface 14, cut and break open, so that this of the Valve seat 14 are detached.
- the cutting edge 60 is formed in the region of the valve seat surface 14, the annular member 16 on the valve member side then e.g. can be designed as a flat ring surface.
- the cutting edge is 60 radially inward from one to the longitudinal central axis of the valve passage 13 approximately coaxial inner cylinder surface 62 and defined radially on the outside by an outer inclined surface 63, which meet to form the cutting edge 60, the Ring surface 16 in turn represents a circle.
- the outer bevel 63 tapers in the shape of a truncated cone Axial direction, which faces the flat valve seat surface 14 is. 4 are the same Advantages as achieved by that in Fig. 3.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Description
- Fig. 1
- einen schematischen senkrechten Schnitt lediglich des Ventildurchlaßbereiches eines Abgasrückführventiles gemäß einem ersten Ausführungsbeispiel,
- Fig. 2
- einen Ausschnitt II in Fig. 1 in größerem Maßstab,
- Fig. 3 und 4
- jeweils einen schematischen Schnitt einer Teilansicht etwa entsprechend derjenigen in Fig. 2 gemäß einem zweiten bzw. dritten Ausführungsbeispiel.
Claims (27)
- Abgasrückführventil für Brennkraftmaschinen, das in einem Gehäuseteil (11) einen Ventildurchlaß (13) mit Ventilsitzfläche (14) und ein Ventilglied (15) mit einer der Ventilsitzfläche (14) zugeordneten und zugewandten Ringfläche (16) an einem axial hochragenden Ringbund aufweist,
dadurch gekennzeichnet, daß die Ringfläche (16) des Ventilgliedes (15) an der Stirnseite am axial überstehenden Ende des Ringbundes (40) des Ventilgliedes (15) ausgebildet ist. - Abgasrückführventil nach Anspruch 1,
dadurch gekennzeichnet, daß die Ventilsitzfläche (14) an der dem Ventilglied (15) zugekehrten Unterseite des Gehäuseteiles (11) angeordnet ist, dem von unten her und in Richtung auf die Ventilsitzfläche (14) Abgas zuführbar ist. - Abgasrückführventil nach Anspruch 2,
dadurch gekennzeichnet, daß das Ventilglied (15) auf der Unterseite des Gehäuseteils (11) angeordnet und von unten her an die Ventilsitzfläche (14) anlegbar ist. - Abgasrückführventil nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß der axial überstehende Ringbund (40) auf der der Ventilsitzfläche (14) zugewandten Oberseite des Ventilgliedes (15) angeordnet ist. - Abgasrückführventil nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Ventilsitzfläche (14) als Schrägfläche (44) ausgebildet ist, die sich in der dem Ventilglied (15) abgewandten Axialrichtung etwa kegelstumpfförmig verjüngt. - Abgasrückführventil nach Anspruch 5,
dadurch gekennzeichnet, daß der Kegelwinkel der kegelstumpfförmigen Schrägfläche (44) in der Größenordnung von etwa 120° liegt. - Abgasrückführventil nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die Ringfläche (16) des Ventilgliedes (15) als Schrägfläche (46) ausgebildet ist, die sich in der der Ventilsitzfläche (14) zugewandten Axialrichtung etwa kegelstumpfförmig verjüngt. - Abgasrückführventil nach Anspruch 7,
dadurch gekennzeichnet, daß der Kegelwinkel der kegelstumpfförmigen Schrägfläche (46) des Ventilgliedes (15) dem Kegelwinkel der als kegelstumpfförmige Schrägfläche (44) ausgebildeten Ventilsitzfläche (14) entspricht. - Abgasrückführventil nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Ringfläche (16), insbesondere Schrägfläche (46), des überstehenden Ringbundes (40) mit ihrem Außendurchmesser und/oder mit ihrem Innendurchmesser jeweils zumindest im wesentlichen mit demjenigen der als Schrägfläche (44) ausgebildeten Ventilsitzfläche (14) abschließt.
- Abgasrückführvenitl nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß der überstehende Ringbund (40) radial außen von einer zur Längsmittelachse (9) des Ventildurchlasses (13) etwa koaxialen äußeren Zylinderfläche (48) begrenzt ist.
- Abgasrückführventil nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß die Ventilsitzfläche (14) des Gehäuseteils (11) an einem querschnittsdünnen, z.B. etwa scheibenförmigen, Kopfbereich (49) des Gehäuseteils (11) ausgebildet ist. - Abgasrückführventil nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, daß die als Schrägfläche (44) ausgebildete Ventilsitzfläche (14) radial innen von einer zur Längsmittelachse (9) des Ventildurchlasses (13) etwa koaxialen inneren Zylinderfläche (47) begrenzt ist, die den Ventildurchlaß (13) umgibt. - Abgasrückführventil 1 nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, daß an die als Schrägfläche (44) ausgebildete Ventilsitzfläche (14) radial außen sich eine Ringfläche (45) anschließt, die innerhalb einer zur Längsmittelachse (9) des Ventildurchlasses (13) etwa rechtwinklig ausgerichteten Radialebene verläuft. - Abgasrückführventil nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß das Ventilglied (15) an seiner
Oberseite (51) eine oder mehrere vertieft gelegene, nach oben offene Aufnahmen (52) als Sammelraum aufweist. - Abgasrückführventil nach Anspruch 14,
dadurch gekennzeichnet, daß das Ventilglied (15) als vertiefte Aufnahmen (52) zumindest eine vertiefte Ringnut aufweist. - Abgasrückführventil nach Anspruch 15,
dadurch gekennzeichnet, daß die Breite der Ringnut etwa 2 - 3 mm beträgt. - Abgasrückführventil 1 nach einem der Ansprüche 14 bis 16,
dadurch gekennzeichnet, daß die mindestens eine Aufnahme (52), insbesondere Ringnut, des Ventilgliedes (15) radial außen durch den axial hochragenden Ringbund (40) begrenzt ist. - Abgasrückführventil 1 nach einem der Ansprüche 14 bis 17,
dadurch gekennzeichnet, daß an die mindestens eine Aufnahme (52), insbesondere Ringnut, des Ventilgliedes (15) sich radial innen eine zur Längsmittelachse (9) hin ansteigende Kegelfläche (53) anschließt. - Abgasrückführventil nach Anspruch 18,
dadurch gekennzeichnet, daß sich die Kegelfläche (53) in der gleichen Axialrichtung wie die als Schrägfläche (44) ausgebildete Ventilsitzfläche (14) etwa kegelstumpfförmig verjüngt. - Abgasrückführventil nach Anspruch 18 oder 19,
dadurch gekennzeichnet, daß die Kegelfläche (53) axial über den Ringbund (40) und die Ringfläche (16) des Ventilgliedes (15) hinaus nach oben übersteht. - Abgasrückführventil nach Anspruch 20,
dadurch gekennzeichnet, daß das axiale Überstandsmaß der Kegelfläche (53) etwa in der Größenordnung von 2 mm liegt. - Abgasrückführventil nach einem der Ansprüche 1 bis 21, dadurch gekennzeichnet, daß die Ringfläche am axial überstehenden Ende des Ringbundes (40) des Ventilgliedes (15) auf eine auf die Ventilsitzfläche (14) gerichtete Schneide (60) reduziert ist.
- Abgasrückführventil nach Anspruch 22,
dadurch gekennzeichnet, daß die Ventilsitzfläche (14) als ebene Fläche ausgebildet ist, die sich innerhalb einer zur Längsmittelachse (9) des Ventildurchlasses (13) etwa rechtwinkligen Radialebene erstreckt. - Abgasrückführventil nach Anspruch 22 oder 23,
dadurch gekennzeichnet, daß die Schneide (60) radial außen von der zur Längsmittelachse (9) des Ventildurchlasses (13) etwa koaxialen äußeren Zylinderfläche (48) und radial innen von einer Innenschrägfläche (61) geformt ist, die sich unter Bildung der Ringfläche (16) treffen. - Abgasrückführventil nach Anspruch 24,
dadurch gekennzeichnet, daß die Innenschrägfläche (61) sich in einer der Ventilsitzfläche (14) abgewandten Axialrichtung etwa kegelstumpfförmig verjüngt. - Abgasrückführventil nach Anspruch 22 oder 23,
dadurch gekennzeichnet, daß die Schneide (60) radial innen von einer zur Längsmittelachse(9) des Ventildurchlasses (13) etwa koaxialen inneren Zylinderfläche (62) und radial außen von einer Außenschrägfläche (63) gebildet ist, die sich unter Bildung der Ringfläche (16) treffen. - Abgasrückführventil nach Anspruch 26,
dadurch gekennzeichnet, daß die Außenschrägfläche (63) sich in einer der Ventilsitzfläche (14) zugewandten Axialrichtung etwa kegelstumpfförmig verjüngt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19825656 | 1998-06-09 | ||
| DE19825656A DE19825656A1 (de) | 1998-06-09 | 1998-06-09 | Abgasrückführventil für Brennkraftmaschinen |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0964147A2 EP0964147A2 (de) | 1999-12-15 |
| EP0964147A3 EP0964147A3 (de) | 2000-10-18 |
| EP0964147B1 true EP0964147B1 (de) | 2003-11-12 |
Family
ID=7870355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99110259A Expired - Lifetime EP0964147B1 (de) | 1998-06-09 | 1999-05-27 | Abgasrückführventil für Brennkraftmaschinen |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0964147B1 (de) |
| DE (2) | DE19825656A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10044780A1 (de) * | 2000-09-09 | 2002-04-04 | Wahler Gmbh & Co Kg Gustav | Steuereinrichtung mit einer Steuerklappe zur Steuerung eines Mediums |
| DE10104227C1 (de) * | 2001-01-31 | 2003-01-16 | Bosch Gmbh Robert | Einrichtung zur Behandlung von Gasströmen |
| DE10108043B4 (de) * | 2001-02-20 | 2005-09-01 | Robert Bosch Gmbh | Selbstreinigende Ventile im Zuluft- oder Abgassystem bei Verbrennungskraftmaschinen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03267563A (ja) * | 1990-03-16 | 1991-11-28 | Taiho Kogyo Co Ltd | 排気ガス再循環装置 |
| DE4009923C2 (de) * | 1990-03-28 | 1995-11-02 | Fev Motorentech Gmbh & Co Kg | Ventil zum Dosieren des Abgasrückführstromes bei Brennkraftmaschinen |
| JPH08135520A (ja) * | 1994-11-14 | 1996-05-28 | Fuji Oozx Inc | 内燃機関用排気ガス還流制御弁装置 |
| DE19539921C1 (de) * | 1995-10-26 | 1997-02-27 | Ranco Inc | Ventil |
| DE19607810A1 (de) | 1996-03-01 | 1997-09-04 | Bosch Gmbh Robert | Abgasrückführventil |
| JPH09264203A (ja) * | 1996-03-28 | 1997-10-07 | Aisan Ind Co Ltd | 排気ガス還流装置 |
| DE19701239A1 (de) * | 1997-01-16 | 1998-07-23 | Bosch Gmbh Robert | Abgasrückführventil |
| DE19711199A1 (de) * | 1997-03-19 | 1998-09-24 | Wahler Gmbh & Co Gustav | Abgasrückführventil für eine Brennkraftmaschine |
| JP3940862B2 (ja) * | 1997-06-25 | 2007-07-04 | 株式会社デンソー | 排気ガス還流制御弁 |
-
1998
- 1998-06-09 DE DE19825656A patent/DE19825656A1/de not_active Withdrawn
-
1999
- 1999-05-27 EP EP99110259A patent/EP0964147B1/de not_active Expired - Lifetime
- 1999-05-27 DE DE59907686T patent/DE59907686D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0964147A2 (de) | 1999-12-15 |
| EP0964147A3 (de) | 2000-10-18 |
| DE59907686D1 (de) | 2003-12-18 |
| DE19825656A1 (de) | 1999-12-16 |
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