EP1061250A2 - Abgasrückführeinrichtung mit einem Tellerventil - Google Patents
Abgasrückführeinrichtung mit einem Tellerventil Download PDFInfo
- Publication number
- EP1061250A2 EP1061250A2 EP00108625A EP00108625A EP1061250A2 EP 1061250 A2 EP1061250 A2 EP 1061250A2 EP 00108625 A EP00108625 A EP 00108625A EP 00108625 A EP00108625 A EP 00108625A EP 1061250 A2 EP1061250 A2 EP 1061250A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- valve
- gas recirculation
- recirculation device
- guide body
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 41
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000010349 pulsation Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000056 organ Anatomy 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
Definitions
- the invention relates to an exhaust gas recirculation device with a Poppet valve according to the preamble of claim 1.
- poppet valves are used for exhaust gas recirculation usually controlled with compressed air. Furthermore, in vehicles with an engine brake in braking mode very high pressures occur in the exhaust system. Open that Poppet valve in the flow direction of the exhaust gas to be recirculated, the exhaust gas pressures that occur during braking operation Exceed the closing force of the poppet valve so that it opens. This reduces the back pressure in the exhaust system, which leads to a clear one Loss of braking power leads and for safety reasons must be avoided under all circumstances. This disadvantage is avoided if the poppet valve is against the flow direction of the exhaust gas, so that the exhaust gas pressure opens the valve disk presses against the valve seat in the closed state. Indeed this arrangement has the disadvantage that in the open Condition of the valve disc as a baffle plate acts and forms a very high flow resistance when the Valve stem is downstream of the valve seat.
- valve designs that counter the exhaust gas flow open, usually a much larger space to sufficient valve cross sections in the area of the opening valve plate to provide for the exhaust gas.
- Poppet valve exposed to the exhaust gas flow when open, so that it is caused by pressure pulsations in the exhaust gas flow Vibrations can be offset, which increases the free flow cross-section constantly changing and the amount of exhaust gas to be recycled no longer corresponds to the target values.
- DE 43 34 370 C1 describes an exhaust gas valve in the form of a Poppet valve known, that against the flow direction of the exhaust gas and against the load of a closing spring opens.
- the valve stem is upstream and opposite protected the exhaust gas flow by a metal bellows attached to its End faces on the one hand on the valve plate and on the other hand on Valve housing is present.
- DE 197 25 668 A1 describes an exhaust gas recirculation device known with a poppet valve
- the valve disc opens against the direction of flow and streamlined is, for example, conical or hemispherical.
- the mass of the Valve plates enlarged, which adversely affects the acceleration behavior of the poppet valve affects and to stronger Actuators leads.
- the larger, area of the valve disk and the larger area which is flown by the exhaust gas Valve mass more heat in the poppet valve and the actuator initiated.
- the invention has for its object in a generic Exhaust gas recirculation device a poppet valve with a low To create mass and in the open state before pressure pulsations to protect. This object is achieved according to the invention solved by the features of claim 1. Other configurations result from the subclaims.
- the valve seat Guide body arranged in the exhaust duct, which is in the open position of the poppet valve the exhaust gas flow on the valve disk passed by.
- this results in a low loss Exhaust gas flow and on the other hand, the valve disc is through Pressure pulsations in the exhaust gas flow are not adversely affected.
- the guide body protects the valve disk largely compared to the exhaust gas flow, so that the introduction of heat in the poppet valve is very low.
- the heat input is low because the heat transfer because of the quiescent exhaust gas is low and the poppet valve only with a small surface on the front is exposed to hot exhaust gas.
- the valve plate can be made flat. He therefore has a low mass and can be used with small actuators can be controlled safely.
- the guide body faces upstream a streamlined outer contour that e.g. conical or can be designed hemispherical. Radial Struts hold the guide body in the exhaust duct of the valve housing. It is advantageous that the struts are also a aerodynamic profile with a low flow coefficient have and e.g. run out in drops in the direction of flow, where the ratio of the extension in the direction of flow to maximum thickness is preferably about five.
- the guide body on the downstream side a stop surface for the valve plate has to which the valve plate in the open Condition created. So that as little heat as possible from the guide body the valve disk is transmitted, the guide body has a downstream recess to which the stop surface can connect radially as a small-area ring surface. Around to reduce the stop surface even further, it can in the circumferential direction be interrupted several times.
- the Guide body has an edge which in the open state of the Poppet valve the largest circumference of the valve disk in the direction of flow towered over.
- the depression formed by the edge of the guide body protects the valve disk against the exhaust gas current as soon as it reaches the opening position.
- Adequate for the exhaust gas flow in the area of the guide body It is to provide a flow cross-section expedient that the exhaust duct in this area to a essentially double-conical valve chamber expanded.
- the valve housing is in the area of the largest diameter of the double-conical valve chamber across divided.
- An exhaust gas recirculation device 1 also has a poppet valve 2 a valve stem 3 and a valve plate 4.
- the valve stem 3 is in a valve guide 14 of a valve housing 5, 6, 7 out and is guided by an actuator 15 with a Control port 16 actuated, e.g. a compressed air connection or a power line.
- the valve housing 5, 6, 7 in the different 1, 2 and 3 has one Exhaust duct 11, 12, 13, which is in the area of the valve plate 4th expanded to a double-conical valve chamber 8, 9, 10. It is divided transversely on a dividing surface 32 for manufacturing reasons.
- the valve chamber 8, 9, 10 has downstream from the valve plate 4 a valve seat 22 on which the valve plate 4 in closed state of the poppet valve 2 is present.
- the flow direction of the exhaust gas is marked with 27.
- a guide body 18, 19, 20 via at least one strut 21 in Valve housing 5, 6, 7 held.
- the strut 21 has a streamlined Profile 28, the drop-shaped in the flow direction 27 approaches and its extension 29 in the direction of flow 27 is about five times the maximum thickness 30.
- the Guide body 18, 19 (Fig. 1, Fig. 2) has one on the Aris flow side aerodynamic outer contour 25 in the form of a cone, while the guide body 20 (Fig. 3) has a corresponding hemispherical Has outer contour 26.
- the valve housing 5, 6, 7 has at the ends of the exhaust duct 11, 12, 13 flanges 17, with which it is connected to an exhaust system, not shown Internal combustion engine can be connected.
- the guide body 18, 19, 20 has a recess 34 and 33, which is directed downstream.
- the recess 33, 34 is adjoined by the annular contact surface 31, the radial extent of which is delimited inwards by the recess 33, 34.
- the contact surface 31 is thus relatively small, so that only little heat is introduced into the valve plate 4 via the contact surface 31.
- the contact surface of the contact surface 31 can be further reduced by several interruptions in the circumferential direction.
- the guide body 18, 19, 20 covers the valve plate 4 in the radial direction and thus protects it from the hot exhaust gas flow. Furthermore, pressure pulsations of the exhaust gas flow cannot influence the opening position of the poppet valve 2.
- an edge 23, 24 comprises the valve disk 4 in its open position (FIG. 2, FIG. 3). This protects the valve plate 4 even better.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
- Fig. 1
- eine schematische Darstellung einer Abgasrückführeinrichtung mit einem Leitkörper mit einer kegelförmigen Außenkontur,
- Fig. 2
- eine Variante zu Fig. 1 und
- Fig. 3
- eine weitere Variante zu Fig. 1.
Der Leitkörper 18, 19, 20 überdeckt den Ventilteller 4 in radialer Richtung und schützt ihn somit vor dem heißen Abgasstrom. Ferner können Druckpulsationen des Abgasstroms die Öffnungsposition des Tellerventils 2 nicht beeinflussen. Bei den Ausführungen des Leitkörpers 19, 20 umfaßt ein Rand 23, 24 den Ventilteller 4 in seiner geöffneten Position (Fig. 2, Fig. 3). Dadurch wird der Ventilteller 4 noch besser geschützt.
Claims (11)
- Abgasrückführeinrichtung mit einem Tellerventil, dessen Ventilschaft ausgehend von einem Ventilteller in Strömungsrichtung des Abgases verläuft und das in entgegengesetzter Richtung öffnet, dadurch gekennzeichnet, daß stromaufwärts vor einem Ventilsitz (22) ein Leitkörper (18, 19, 20) im Abgaskanal (13, 8, 9, 10) angeordnet ist, der in der geöffneten Position des Tellerventils (2) die Abgasströmung an dem Ventilteller (4) vorbeileitet.
- Abgasrückführeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Leitkörper (18, 19, 20) eine kegelförmige (25) oder halbkugelförmig (26) Außenkontur aufweist.
- Abgasrückführeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß radial verlaufende Streben (21) den Leitkörper (18, 19, 20) in dem Abgaskanal (13, 8, 9, 10) des Ventilgehäuses (5, 6, 7) halten.
- Abgasrückführeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Streben (21) in Strömungsrichtung (27) ein Profil (28) mit einem geringen Strömungsbeiwert haben.
- Abgasrückführeinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Profil (28) in Strömungsrichtung (27) tropfenförmig ausläuft und das Verhältnis der Erstreckung (29) in Strömungsrichtung (27) zur maximalen Dicke (30) vorzugsweise ungefähr fünf ist.
- Abgasrückführeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Leitkörper (18, 19, 20) auf der stromabwärts gelegenen Seite eine Anschlagfläche (31) für den Ventilteller (4) aufweist.
- Abgasrückführeinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Leitkörper (18, 19, 20) eine stromabwärts gerichtete Ausnehmung (33) hat, an die sich radial eine kleinflächige Anschlagfläche (31) anschließt.
- Abgasrückführeinrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Anschlagfläche (31) in Umfangsrichtung unterbrochen ist.
- Abgasrückführeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Leitkörper (19, 20) einen Rand (23, 24) aufweist, der im geöffneten Zustand des Tellerventils (2) den größten Umfang des Ventiltellers (4) in Strömungsrichtung (27) überragt.
- Abgasrückführeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Abgaskanal (13) im Bereich des Leitkörpers (18, 19, 20) eine im wesentlichen doppelkonische Ventilkammer (8, 9, 10) bildet.
- Abgasrückführeinrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Ventilgehäuse (5, 6, 7) im Bereich des größten Durchmesser der doppelkonischen Ventilkammer (8, 9, 10) quer geteilt ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19927186 | 1999-06-15 | ||
| DE19927186A DE19927186A1 (de) | 1999-06-15 | 1999-06-15 | Abgasrückführeinrichtung mit einem Tellerventil |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1061250A2 true EP1061250A2 (de) | 2000-12-20 |
| EP1061250A3 EP1061250A3 (de) | 2001-09-05 |
| EP1061250B1 EP1061250B1 (de) | 2004-12-08 |
Family
ID=7911256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00108625A Expired - Lifetime EP1061250B1 (de) | 1999-06-15 | 2000-04-20 | Abgasrückführeinrichtung mit einem Tellerventil |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6345612B1 (de) |
| EP (1) | EP1061250B1 (de) |
| DE (2) | DE19927186A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117212495A (zh) * | 2023-10-09 | 2023-12-12 | 江苏凌航时代智控科技有限公司 | 一种自研磨调节切断盘阀 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005020484A1 (de) * | 2005-04-29 | 2006-11-02 | Mahle International Gmbh | Abgasrückführeinrichtung |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4334370C1 (de) | 1993-10-08 | 1994-09-01 | Daimler Benz Ag | Abgasventil einer Brennkraftmaschine |
| DE19524603C1 (de) | 1995-07-06 | 1996-08-22 | Daimler Benz Ag | Verbrennungsmotor, insbesondere Verbrennungsmotor für ein Kraftfahrzeug, mit einer Abgasrückführung |
| DE19607811A1 (de) | 1996-03-01 | 1997-09-04 | Bosch Gmbh Robert | Abgasrückführventil |
| DE19725668C1 (de) | 1997-06-18 | 1998-10-29 | Daimler Benz Ag | Abgasrückführeinrichtung |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3762384A (en) * | 1972-01-24 | 1973-10-02 | Gen Motors Corp | Exhaust gas recirculation valve |
| US3774583A (en) * | 1972-05-08 | 1973-11-27 | Gen Motors Corp | Venturi vacuum responsive exhaust gas recirculation control system |
| JPS5213582B2 (de) * | 1973-07-25 | 1977-04-15 | ||
| US3972312A (en) * | 1974-02-01 | 1976-08-03 | Brooks Walker | Exhaust gas recirculation control by high port actuated diaphragm |
| US3921611A (en) * | 1974-02-01 | 1975-11-25 | Brooks Walker | Exhaust gas recirculation control by exhaust flow |
| US4056083A (en) * | 1975-12-19 | 1977-11-01 | Toyota Jidosha Kogyo Kabushiki Kaisha | Exhaust gas recirculator for purification of emission from an internal combustion engine |
| JPS56126659A (en) * | 1980-03-07 | 1981-10-03 | Hitachi Ltd | Exhaust gas back flow valve |
| DE19704091A1 (de) * | 1997-02-04 | 1998-08-06 | Wahler Gmbh & Co Gustav | Abgasrückführventil für eine Brennkraftmaschine |
| US6164269A (en) * | 1997-10-31 | 2000-12-26 | Caterpillar Inc. | Exhaust gas recirculation valve assembly having an integrated check valve |
| JPH11270414A (ja) * | 1998-03-23 | 1999-10-05 | Nissan Diesel Motor Co Ltd | Egrガスケットの構造 |
| DE19825583B4 (de) * | 1998-06-09 | 2014-04-03 | Gustav Wahler Gmbh U. Co Kg | Abgasrückführventil für Brennkraftmaschinen und Verfahren zum Betrieb eines solchen |
| DE19920820A1 (de) * | 1999-05-06 | 2000-11-09 | Bosch Gmbh Robert | Abgasventil |
-
1999
- 1999-06-15 DE DE19927186A patent/DE19927186A1/de not_active Ceased
-
2000
- 2000-04-20 DE DE2000508883 patent/DE50008883D1/de not_active Expired - Fee Related
- 2000-04-20 EP EP00108625A patent/EP1061250B1/de not_active Expired - Lifetime
- 2000-06-12 US US09/592,540 patent/US6345612B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4334370C1 (de) | 1993-10-08 | 1994-09-01 | Daimler Benz Ag | Abgasventil einer Brennkraftmaschine |
| DE19524603C1 (de) | 1995-07-06 | 1996-08-22 | Daimler Benz Ag | Verbrennungsmotor, insbesondere Verbrennungsmotor für ein Kraftfahrzeug, mit einer Abgasrückführung |
| DE19607811A1 (de) | 1996-03-01 | 1997-09-04 | Bosch Gmbh Robert | Abgasrückführventil |
| DE19725668C1 (de) | 1997-06-18 | 1998-10-29 | Daimler Benz Ag | Abgasrückführeinrichtung |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117212495A (zh) * | 2023-10-09 | 2023-12-12 | 江苏凌航时代智控科技有限公司 | 一种自研磨调节切断盘阀 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19927186A1 (de) | 2000-12-28 |
| US6345612B1 (en) | 2002-02-12 |
| DE50008883D1 (de) | 2005-01-13 |
| EP1061250B1 (de) | 2004-12-08 |
| EP1061250A3 (de) | 2001-09-05 |
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