EP1061250B1 - Abgasrückführeinrichtung mit einem Tellerventil - Google Patents
Abgasrückführeinrichtung mit einem Tellerventil Download PDFInfo
- Publication number
- EP1061250B1 EP1061250B1 EP00108625A EP00108625A EP1061250B1 EP 1061250 B1 EP1061250 B1 EP 1061250B1 EP 00108625 A EP00108625 A EP 00108625A EP 00108625 A EP00108625 A EP 00108625A EP 1061250 B1 EP1061250 B1 EP 1061250B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- exhaust
- gas recirculation
- recirculation device
- accordance
- 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
- 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.
- a part of the exhaust gas from an exhaust pipe can improve be returned to an air intake passage.
- the hot exhaust gases should control the exhaust gas recirculation system thermally not too high load.
- control organs usually serve poppet valves, the pneumatic, Electromagnetically or the like. Be actuated.
- valve designs that oppose the exhaust flow require open, usually a much larger space to order Sufficient valve cross-sections in the area of the opening valve disc to provide for the exhaust gas.
- that is Poppet valve exposed in the open state to the exhaust gas flow so that it is due to pressure pulsations in the exhaust stream in Vibrations can be offset, resulting in the free flow cross section constantly changed and the amount of exhaust gas to be recirculated no longer corresponds to the setpoints.
- DE 196 07 811 A1 also shows a generic exhaust gas recirculation device.
- the poppet valve by a Electromagnet operated.
- To compensate for the closing direction acting exhaust gas forces is located in the valve stem a compensation hole, the exhaust duct with a compensation chamber in the Actuator connects.
- an exhaust valve in the form of a Poppet valve known contrary to the flow direction of the exhaust gas and against the load of a closing spring opens.
- the valve stem is directed upstream and opposite the exhaust gas stream protected by a metal bellows, which at his End faces on the one hand on the valve plate and on the other Valve body rests.
- a central region of the support body which is the valve disc facing away from the end of the diaphragm bellows, has a streamlined, an inflow direction of the exhaust valve opposite conical shape.
- the interior of the diaphragm bellows is about compensation holes in the valve plate with the Outflow side of the valve disk in conjunction.
- the invention is based on the object at a generic exhaust gas recirculation device a poppet valve with to create a low mass and in the open state before To protect pressure pulsations. This task is performed according to the Invention solved by the features of claim 1. Further Embodiments emerge from the subclaims.
- the valve plate is upstream of the valve seat and the Valve disc a guide body fixedly arranged in the exhaust passage, in the open position of the poppet valve to the exhaust flow passes the valve plate.
- In the opened state protects the Guide the valve head largely opposite the exhaust stream, so that the heat input into the poppet valve is very low.
- the closed state of the poppet valve is the Heat input low, since the heat transfer because of the dormant Exhaust gas is low and the poppet valve only with a small surface on the front side of the hot exhaust gas is exposed.
- the valve disk can be made flat. He therefore has a low mass and can with small actuators safely controlled.
- the guide body faces upstream a streamlined outer contour, e.g. conical or hemispherical shaped. Radial running Struts hold the baffle in the exhaust passage of the valve body. It is advantageous that the struts also a streamlined profile with a low flow coefficient have and e.g. leaking out in the flow direction, wherein the ratio of the extent in the flow direction to maximum thickness is preferably about five.
- the guide body on the downstream side of a stop surface for the valve plate has, to which the valve disc in open Condition applies. So that as little heat from the guide body the valve plate is transmitted, the guide body has a downstream recess to which the abutment surface can connect radially as a small-area annular surface. Around To reduce the stop surface even further, it can in the circumferential direction be interrupted several times.
- a further embodiment of the invention provides that the Guide body has an edge in the open state of the Poppet valves the largest circumference of the valve disk in the flow direction surmounted.
- the depression formed by the rim the guide body protects the valve disk from the exhaust gas current as soon as it reaches the opening position.
- An exhaust gas recirculation device 1 has a poppet valve 2 with a valve stem 3 and a valve disk 4.
- the valve stem 3 is in a valve guide 14 of a valve housing 5, 6, 7th guided and is by an actuator 15 with a Control terminal 16 operated, e.g. a compressed air connection or a power line.
- the valve housing 5, 6, 7 in the various Embodiments of Fig. 1, Fig. 2 and Fig. 3 has a Exhaust duct 11, 12, 13, located in the region of the valve disk 4th extended to a double conical valve chamber 8, 9, 10. It is divided across a dividing surface 32 for manufacturing reasons.
- the valve chamber 8, 9, 10 has downstream of the valve disk 4 a valve seat 22, on which the valve disk 4 in closed state of the poppet valve 2 is applied.
- the flow direction of the exhaust gas is denoted by 27.
- valve housing 5, 6, 7 Upstream of the valve seat 22 is in the valve chamber 8, 9, 10 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 shape in the flow direction 27 runs and whose extension 29 in the flow direction 27 is about five times the maximum thickness of 30.
- the Guide body 18, 19 (Fig. 1, Fig. 2) has on the upstream side of a streamlined outer contour 25 in the form of a cone, while the baffle 20 ( Figure 3) has a corresponding hemispherical shape Outside contour 26 has.
- the valve housing 5, 6, 7 has at the ends of the exhaust passage 11, 12, 13 flanges 17, with which it to an unspecified exhaust system of a Internal combustion engine can be connected.
- the guide body 18, 19, 20 has a recess 34 or 33, which is directed downstream.
- 34 closes the annular contact surface 31, their radial extent inwardly through the recess 33, 34 is limited.
- the contact surface 31 is thus relatively small area, so that only a little heat over the contact surface 31 in the Valve plate 4 is initiated.
- the contact surface of the contact surface 31 can by multiple interruptions in the circumferential direction be further reduced.
- the guide body 18, 19, 20 covers the valve disk 4 in radial Direction and thus protects him from the hot exhaust gas flow. Further, pressure pulsations of the exhaust gas flow may be the opening position of poppet valve 2 does not affect. Both Embodiments of the guide body 19, 20 includes an edge 23, 24 the Valve plate 4 in its open position (Fig. 2, Fig. 3). As a result, the valve disk 4 is even better protected.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Lift Valve (AREA)
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.
Claims (11)
- Abgasrückführeinrichtung(1) mit einem Tellerventil (2), dessen Ventilschaft (3) ausgehend von einem Ventilteller (4) in Strömungsrichtung (27) des Abgases verläuft und das in entgegengesetzter Richtung öffnet, wobei die Stirnfläche des Ventiltellers (4) in geschlossener Position des Tellerventils (2) ungehindert vom Abgas beaufschlagt ist,
dadurch gekennzeichnet, dass stromaufwärts vor einem Ventilsitz (22) und dem Ventilteller (4) ein Leitkörper (18, 19, 20) im Abgaskanal (13, 8, 9, 10) fest 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 Durchmessers 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 EP1061250A2 (de) | 2000-12-20 |
EP1061250A3 EP1061250A3 (de) | 2001-09-05 |
EP1061250B1 true 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) |
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 |
Family Cites Families (16)
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 |
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 |
DE19704091A1 (de) * | 1997-02-04 | 1998-08-06 | Wahler Gmbh & Co Gustav | Abgasrückführventil für eine Brennkraftmaschine |
DE19725668C1 (de) | 1997-06-18 | 1998-10-29 | Daimler Benz Ag | Abgasrückführeinrichtung |
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
Also Published As
Publication number | Publication date |
---|---|
DE19927186A1 (de) | 2000-12-28 |
US6345612B1 (en) | 2002-02-12 |
EP1061250A2 (de) | 2000-12-20 |
EP1061250A3 (de) | 2001-09-05 |
DE50008883D1 (de) | 2005-01-13 |
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