EP0866220B1 - Exhaust gas recirculation valve for a combustion engine - Google Patents
Exhaust gas recirculation valve for a combustion engine Download PDFInfo
- Publication number
- EP0866220B1 EP0866220B1 EP97120115A EP97120115A EP0866220B1 EP 0866220 B1 EP0866220 B1 EP 0866220B1 EP 97120115 A EP97120115 A EP 97120115A EP 97120115 A EP97120115 A EP 97120115A EP 0866220 B1 EP0866220 B1 EP 0866220B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- approximately
- gas recirculation
- exhaust
- frustoconical
- face
- 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
- 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
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- 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
Definitions
- the invention relates to an exhaust gas recirculation valve for an internal combustion engine with the features in the preamble of Claim 1.
- the invention has for its object an exhaust gas recirculation valve of the type mentioned at the beginning that a flawless closing function or opening function guaranteed between the valve seat and the valve member is.
- FIG. 1 an exhaust gas recirculation valve 10 is shown, which in designed essentially in a known manner (DE-GM 296 12 465) apart from the special training of the Valve member and the valve seat.
- the exhaust gas recirculation valve 10 is for an internal combustion engine suitable and connectable in a known manner with their exhaust system. It has a housing 11 with a channel 12 which an inlet area 13 for exhaust gas, an outlet area 14 for e.g. an air / exhaust gas mixture and between the two has a valve seat 15 which is of a suitable Valve member 16 is controlled.
- the valve member 16 is with an actuator 17, e.g. a pestle, connected, at the top with an actuator 19 known type is connected, which is suitable for the valve member 16 in the direction of arrow 26 in its open position to move.
- the valve seat 15 is made of an inserted into the housing 11, formed essentially cylindrical sleeve 51, the one facing the inlet region 13 inner frustoconical surface 52 which extends in the direction tapers towards the valve member 16. More details, referring to the special design of the valve member 16 and the valve seat 15, are hereinafter based on the enlarged representation in FIG. 2 explained.
- valve member 16 is seated in the closed state shown with an at least slightly frustoconical ring surface 53 on a correspondingly shaped valve seat surface 73 of the valve seat 15.
- the valve seat surface 73 tapers itself in the same way as the annular surface 53 in the valve member 16 facing away, thus down in Fig. 2 there, and this at least slightly frustoconical, whereby the peculiarity is that the angle of both Surfaces 53.73 e.g. is in the range of about 10 °.
- the approximately frustoconical valve seat surface 73 is in advantageously curved at least slightly concave. Because of the large radius of curvature, this is curvature not visible in the drawing. In addition or instead is the approximately frustoconical annular surface 53 of the Valve member 16 at least slightly convex, z. B. with the same curvature radius as the valve seat surface 73.
- the approximately frustoconical annular surface 53 of the valve member 16 advantageously has a larger outside diameter than the approximately frustoconical valve seat surface 73, so that the annular surface 53 outside via the valve seat surface 73 survives. This serves to compensate for radial tolerances.
- the approximately frustoconical valve seat surface 73 is formed on an axially projecting annular collar 74 of the housing 11, in particular the bushing 51.
- This collar 74 projects axially upward in FIG. 2. It is delimited on the inside by a cylindrical surface 75 and on the outside by an inclined surface 76 which tapers approximately in the shape of a truncated cone in the direction facing the valve member 16. The angle of this outside inclined surface 76 is, for example, approximately 60 °.
- the annular collar 74 projects axially by approximately 0.2 mm beyond the end face 77 adjoining the inclined surface 76 on the outside.
- the radially measured cross-sectional thickness of the collar 74 is in the range of approximately 0.6 mm.
- the diameter of the inside cylinder surface 75 is in the range of about 16 mm and the outside diameter of the outside inclined surface 76 is in the range of about 16.6 mm, which of course only applies to a constructive, but advantageously designed example.
- the size of the approximately frustoconical valve seat surface 73 is relatively small in comparison to the other dimensions of the bushing 51, and the annular collar 74 is thereby designed at least approximately approximately in the shape of a blade.
- the approximately frustoconical inclined surface 76 has the advantage, among other things, of increasing the strength of the annular collar 74.
- the outer diameter of this ring surface 53rd the outer diameter of the valve seat surface 73 of the collar 74 corresponds at least essentially.
- the outer diameter the annular surface 53 is thus also in the range of about 16.6 mm.
- the annular surface 53 closes approximately on the outside on the same diameter as the valve seat surface 73.
- the inner diameter of the annular surface 53 of the valve member 16 is however smaller than the inside diameter of the valve seat surface 73. This is the inside diameter of the ring surface 53 of the valve member 16 in the embodiment shown in Range of about 15 mm.
- the valve member 16 also has an approximately frustoconical shape Outer surface 54, which is towards the valve seat 15 tapers and axially adjoins the outer ring surface 53.
- This outer surface 54 runs e.g. under a Angle of about 60 °.
- the outside diameter of the valve member 16 at the largest point corresponds to the outside diameter the outer surface 54 and lies in the area e.g. about 19 mm, this outer diameter in relation to the outer diameter the socket 15 is significantly smaller.
- the inner diameter of the outer surface 54 corresponds to the outer diameter the approximately frustoconical ring surface 53 and is therefore also in the range e.g. of about 16.6 mm.
- the valve member 16 has an axially approximately on the inside frustoconical ring surface 53 adjoining frustoconical surface 55, which tapers in the same direction as the annular surface 53 and the outer surface 54, that is to say in FIG. 2 downwards.
- the truncated cone surface 55 can be one Angle e.g. have in the range of about 72 °.
- valve member 16 In the closed state shown, the valve member 16 is seated an only narrow outer edge area of its approximately frustoconical Annular surface 53 on the corresponding valve seat surface 73 of the collar 74.
- the design also has the Advantage that even with relatively small axial strokes of the valve member 16 in the opening direction according to Arrow 26 a correspondingly large opening cross section for the passage of the medium from the inlet area 13 in the Channel 12 is created.
- Everything is special Geometric design of the valve member 16 and the valve seat 15 realized in a simple and inexpensive manner.
- the valve seat 15 has great stability. The danger that particles attach themselves to the stick together interacting surfaces, is avoided, and this in a simple constructive manner.
- At least the approximately frustoconical Rin product 53 and / or the approximately frustoconical Valve seat surface 73 may still be coated, e.g. with plastic.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Description
Die Erfindung bezieht sich auf ein Abgasrückführventil für eine Brennkraftmaschine mit den Merkmalen im Oberbegriff des Anspruchs 1.The invention relates to an exhaust gas recirculation valve for an internal combustion engine with the features in the preamble of Claim 1.
Bei einem bekannten Abgasrückführventil (DE-GM 296 12 465) sitzt das Ventilglied im Schließzustand mit einem relativ großen äußeren Randbereich seiner etwa kegelstumpfförmigen Ringfläche auf einer entsprechenden Ventilsitzfläche des Ventilsitzes auf, wobei sowohl die Ringfläche als auch die Ventilsitzfläche als stufenlose Kegelstumpfflächen ausgebildet sind. Es hat sich gezeigt, daß sich im Betrieb derartiger Abgasrückführventile, hierbei insbesondere im Zusammenhang mit der Abgaskühlung, im Bereich zwischen dem Ventilglied und dem Ventilsitz dadurch Probleme ergeben, daß sich bei niedrigen Temperaturen in diesen Bereichen Flüssigkeit, Kondensat und/oder Partikel sammeln, die am Ventilsitz festkleben können und eine zuverlässige Schließfunktion und öffnungsfunktion des Abgasrückführventils unmöglich machen. In a known exhaust gas recirculation valve (DE-GM 296 12 465) the valve member sits in the closed state with a relative large outer edge area of its approximately frustoconical Ring surface on a corresponding valve seat surface of the Valve seat on, both the annular surface and the Valve seat surface designed as a continuous truncated cone surface are. It has been shown that such Exhaust gas recirculation valves, in particular in this context with the exhaust gas cooling, in the area between the Valve member and the valve seat cause problems, that at low temperatures in these areas Collect liquid, condensate and / or particles that on Valve seat can stick and a reliable closing function and opening function of the exhaust gas recirculation valve to make impossible.
Der Erfindung liegt die Aufgabe zugrunde, ein Abgasrückführventil der eingangs genannten Art so zu gestalten, daß eine einwandfreie Schließfunktion bzw. öffnungsfunktion zwischen dem Ventilsitz und dem Ventilglied gewährleistet ist.The invention has for its object an exhaust gas recirculation valve of the type mentioned at the beginning that a flawless closing function or opening function guaranteed between the valve seat and the valve member is.
Die Aufgabe ist bei einem Abgasrückführventil der eingangs genannten Art gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte weitere Erfindungsmerkmale und Ausgestaltungen ergeben sich aus den Ansprüchen 2 bis 24 Beim erfindungsgemäßen Abgasrückführventil ist durch diese besondere Gestaltung des Ventilsitzes der Ansammlung von Flüssigkeit, Kondensat und/oder Partikeln entgegengewirkt, die sich somit im Bereich zwischen dem Ventilsitz und dem Ventilglied nicht anlagern oder gar dort ankleben können. Ferner ist durch die besondere Geometrie des Ringbundes und/oder des Ventilgliedes eine vorteilhafte Durchflußcharakteristik und gute Durchströmung gewährleistet, so daß etwaige, sich sonst möglicherweise ablagernde Flüssigkeit, Kondensat und/oder Partikel schon aufgrund der Strömung mitgerissen werden und auch dadurch einer etwaigen Ablagerung entgegengewirkt ist. Aufgrund der Geometrie des Ventilgliedes und/oder des Ventilsitzes ist auf Dauer eine einwandfreie Schließfunktion bzw. Öffnungsfunktion des Ventiles gewährleistet, und dies mit einfachen und kostengünstigen Mitteln.The task is the beginning of an exhaust gas recirculation valve mentioned type according to the invention by the features of Claim 1 solved. Advantageous further features of the invention and configurations result from claims 2 to 24 In the exhaust gas recirculation valve according to the invention, this is special design of the valve seat of the accumulation of liquid, Condensate and / or particles counteracted, which are thus in the area Do not rest between the valve seat and the valve member or even stick there. Furthermore, by the special geometry of the collar and / or the valve member advantageous flow characteristics and good Flow guaranteed, so that any, otherwise possibly depositing liquid, condensate and / or particles be swept away by the current and therefore one any deposit is counteracted. Due to the geometry of the Valve member and / or the valve seat is a permanent perfect closing function or opening function of the valve guaranteed, and with simple and inexpensive Means.
Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung.Further details and advantages of the invention emerge from the description below.
Der vollständige Wortlaut der Ansprüche ist vorstehend allein zur Vermeidung unnötiger Wiederholungen nicht wiedergegeben, sondern stattdessen lediglich durch Nennung der Anspruchsnummern darauf Bezug genommen, wodurch jedoch alle diese Anspruchsmerkmale als an dieser Stelle ausdrücklich und erfindungswesentlich offenbart zu gelten haben. The full wording of the claims is alone above not reproduced to avoid unnecessary repetitions, but instead only by mentioning the claim numbers referred to, however, all of these Claim characteristics as express at this point and disclosed to be essential to the invention.
Die Erfindung ist nachfolgend anhand eines in den Zeichnungen gezeigten Ausführungsbeispieles näher erläutert. Es zeigen:
- Fig. 1
- einen schematischen Schnitt eines Abgasrückführventiles im geschlossenen Zustand,
- Fig. 2
- einen schematischen Schnitt eines Teiles des Ventilgliedes und des Ventilsitzes des Abgasrückführventiles in Fig. 1, in größerem Maßstab.
- Fig. 1
- 1 shows a schematic section of an exhaust gas recirculation valve in the closed state,
- Fig. 2
- a schematic section of part of the valve member and the valve seat of the exhaust gas recirculation valve in Fig. 1, on a larger scale.
In Fig. 1 ist ein Abgasrückführventil 10 gezeigt, das im
wesentlichen in bekannter Weise (DE-GM 296 12 465) gestaltet
ist, abgesehen von der besonderen Ausbildung des
Ventilgliedes und des Ventilsitzes.In Fig. 1, an exhaust
Das Abgasrückführventil 10 ist für eine Brennkraftmaschine
geeignet und in bekannter Weise mit deren Abgassystem verbindbar.
Es weist ein Gehäuse 11 mit einem Kanal 12 auf, der
einen Einlaßbereich 13 für Abgas, einen Auslaßbereich 14
für z.B. ein Luft-/Abgas-Gemisch und zwischen beiden
einen Ventilsitz 15 aufweist, der von einem passenden
Ventilglied 16 beherrscht wird. Das Ventilglied 16
ist mit einem Betätigungsglied 17, z.B. einem Stößel, verbunden,
das am oberen Ende mit einer Betätigungseinrichtung
19 bekannter Art verbunden ist, die geeignet ist, das Ventilglied
16 in Pfeilrichtung 26 in seine öffnungsstellung
zu bewegen. The exhaust
Der Ventilsitz 15 ist aus einer in das Gehäuse 11 eingesetzten,
im wesentlichen zylindrischen Buchse 51 gebildet,
die am dem Einlaßbereich 13 zugewandten Ende eine
innere Kegelstumpffläche 52 aufweist, die sich in Richtung
zum Ventilglied 16 hin verjüngt. Weitere Einzelheiten,
die sich auf die besondere Gestaltung des Ventilgliedes
16 und des Ventilsitzes 15 beziehen, sind
nachstehend anhand der vergrößerten Darstellung in Fig. 2
erläutert.The
Das Ventilglied 16 sitzt im dargestellten Schließzustand
mit einer zumindest schwach kegelstumpfförmigen Ringfläche
53 auf einer entsprechend geformten Ventilsitzfläche 73
des Ventilsitzes 15 auf. Die Ventilsitzfläche 73 verjüngt
sich in gleicher Weise wie die Ringfläche 53 in dem Ventilglied
16 abgewandter Richtung, somit in Fig. 2 nach unten
hin, und dies zumindest schwach kegelstumpfförmig, wobei
die Besonderheit darin liegt, daß der Winkel beider
Flächen 53,73 z.B. im Bereich von etwa 10° liegt.The
Die etwa kegelstumpfförmige Ventilsitzfläche 73 ist in
vorteilhafter Weise noch zumindest geringfügig konkav gewölbt.
Aufgrund des großen Wölbungsradius ist diese Wölbung
in der Zeichnung nicht sichtbar. Zusätzlich oder stattdessen
ist die etwa kegelstumpfförmige Ringfläche 53 des
Ventilgliedes 16 zumindest geringfügig konvex gewölbt, z. B.
mit gleichem Wölbungsradius wie die Ventilsitzfläche 73.The approximately frustoconical
Die etwa kegelstumpfförmige Ringfläche 53 des Ventilgliedes
16 hat in vorteilhafter Weise einen größeren Außendurchmesser
als die etwa kegelstumpfförmige Ventilsitzfläche 73,
so daß die Ringfläche 53 außen über die Ventilsitzfläche 73
übersteht. Dies dient zum Ausgleich radialer Toleranzen. The approximately frustoconical
Die etwa kegelstumpfförmige Ventilsitzfläche 73 ist an
einem axial überstehenden Ringbund 74 des Gehäuses 11, insbesondere
der Buchse 51, ausgebildet. Dieser Ringbund 74
steht in Fig. 2 axial nach oben über. Er ist innenseitig
von einer Zylinderfläche 75 und außenseitig von einer
Schrägfläche 76 begrenzt, die in zum Ventilglied 16 weisender
Richtung sich etwa kegelstumpfförmig verjüngt.
Der Winkel dieser außenseitigen Schrägfläche 76 beträgt
z.B. etwa 60°. Der Ringbund 74 steht axial etwa um 0,2 mm
über die außen an die Schrägfläche 76 angrenzende Stirnfläche
77 über. Die radial gemessene Querschnittsdicke des
Ringbundes 74 liegt im Bereich von etwa 0,6 mm. Dabei liegt
der Durchmesser der innenseitigen Zylinderfläche 75 im Bereich
von etwa 16 mm und der Außendurchmesser der außenseitigen
Schrägfläche 76 im Bereich von etwa 16,6 mm, was
natürlich nur für ein konstruktives, jedoch vorteilhaft
gestaltetes Beispiel gilt. Ersichtlich ist somit die Größe
der etwa kegelstumpfförmigen Ventilsitzfläche 73 im Vergleich
zu den sonstigen Abmessungen der Buchse 51 relativ klein
bemessen und der Ringbund 74 dadurch zumindest annähernd
etwa schneidenförmig gestaltet. Die etwa kegelstumpfförmige
Schrägfläche 76 hat dabei u. a. den Vorteil der Steigerung
der Festigkeit des Ringbundes 74.The approximately frustoconical
The angle of this outside
Betrachtet man die kegelstumpfförmige Ringfläche 53 des Ventilgliedes
16 im Detail, so ist als eine Besonderheit festzustellen,
daß der Außendurchmesser dieser Ringfläche 53
dem Außendurchmesser der Ventilsitzfläche 73 des Ringbundes
74 zumindest im wesentlichen entspricht.Der Außendurchmesser
der Ringfläche 53 liegt somit ebenfalls im Bereich von
etwa 16,6 mm. Somit schließt die Ringfläche 53 außen etwa
auf dem gleichen Durchmesser ab wie die Ventilsitzfläche 73.
Der Innendurchmesser der Ringfläche 53 des Ventilgliedes 16
ist jedoch kleiner als der Innendurchmesser der Ventilsitzfläche
73. So liegt der Innendurchmesser der Ringfläche 53
des Ventilgliedes 16 beim gezeigten Ausführungsbeispiel im
Bereich von etwa 15 mm.Consider the frustoconical
Das Ventilglied 16 weist ferner eine etwa kegelstumpfförmige
Außenfläche 54 auf, die sich in Richtung zum Ventilsitz
15 verjüngt und sich außen axial an die Ringfläche 53 anschließt.
Diese Außenfläche 54 verläuft z.B. unter einem
Winkel von etwa 60°. Der Außendurchmesser des Ventilgliedes
16 an der größten Stelle entspricht dem Außendurchmesser
der Außenfläche 54 und liegt im Bereich z.B. von etwa
19 mm, wobei dieser Außendurchmesser im Verhältnis zum Aussendurchmesser
der Buchse 15 deutlich kleiner ist.The
Der Innendurchmesser der Außenfläche 54 entspricht dem Aussendurchmesser
der etwa kegelstumpfförmigen Ringfläche 53
und liegt somit ebenfalls im Bereich z.B. von etwa 16,6 mm. The inner diameter of the
Das Ventilglied 16 weist eine sich innen axial an die etwa
kegelstumpfförmige Ringfläche 53 anschließende Kegelstumpffläche
55 auf, die sich in gleicher Richtung verjüngt wie
die Ringfläche 53 und die Außenfläche 54, also in Fig. 2
nach unten hin. Die Kegelstumpffläche 55 kann dabei einen
Winkel z.B. im Bereich von etwa 72° aufweisen.The
Im gezeigten Schließzustand sitzt das Ventilglied 16 mit
einem nur schmalen Außenrandbereich seiner etwa kegelstumpfförmigen
Ringfläche 53 auf der entsprechenden Ventilsitzfläche
73 des Ringbundes 74 auf.In the closed state shown, the
Aus Fig. 2 wird deutlich, daß im Bereich zwischen der etwa
kegelstumpfförmigen Außenfläche 54 des Ventilgliedes 16
einerseits und der Schrägfläche 76 des Ringbundes 74 sowie
der Stirnfläche 77 ein relativ großer ringförmiger Freiraum
geschaffen ist. Dieser Freiraum hat den Vorteil, daß
in diesem Bereich etwaigen Ablagerungen entgegengewirkt
wird, die sich im Laufe des Betriebes zwischen der Ringfläche
53 und der Ventilsitzfläche 73 bilden könnten.
Ferner ist auch zwischen der Zylinderfläche 75 einerseits
und der Kegelstumpffläche 55 sowie dem frei liegenden Bereich
der Ringfläche 53 andererseits ebenfalls ein relativ
großer ringförmiger Freiraum geschaffen, der gleichermaßen
etwaigen Ablagerungen entgegenwirkt. Die genannten Freiräume
gestatten eine gute Durchflußcharakteristik bei geöffnetem
Ventilglied 16. Die Gestaltung hat ferner den
Vorteil, daß bereits bei relativ geringen axialen Hubbewegungen
des Ventilgliedes 16 in öffnungsrichtung gemäß
Pfeil 26 ein entsprechend großer öffnungsquerschnitt für
den Durchlaß des Mediums vom Einlaßbereich 13 in den
Kanal 12 geschaffen ist. Bei allem ist die besondere
geometrische Gestaltung des Ventilgliedes 16 und des Ventilsitzes
15 in einfacher und kostengünstiger Weise verwirklicht.
Der Ventilsitz 15 hat eine große Standfestigkeit.
Die Gefahr, daß sich Partikel ansetzen und an den
miteinander zusammenwirkenden Flächen kleben bleiben,
ist vermieden, und dies in einfacher konstruktiver Weise.From Fig. 2 it is clear that in the area between the approximately
frustoconical
Zusätzlich können zumindest die etwa kegelstumpfförmige
Rinfläche 53 und/oder die etwa kegelstumpfförmige
Ventilsitzfläche 73 noch beschichtet sein, z.B.
mit Kunststoff.In addition, at least the approximately
Claims (24)
- Exhaust-gas recirculation valve for an internal-combustion engine, having a housing (11), which has a passage (12) with an inlet region (13), an outlet region (14) and a valve seat (15) which is formed between the inlet region (13) and the outlet region (14) and is governed by a valve member (16) which, in the closed state, rests, by means of an at least slightly frustoconical ring surface (53), on a corresponding valve seat face (73) which tapers at least slightly frustoconically, in the same way as the ring surface (53), in the direction away from the valve member (16), characterized in that the approximately frustoconical valve seat face (73) is formed on an axially projecting ring collar (74) of the housing (11, 51).
- Exhaust-gas recirculation valve according to Claim 1, characterized in that the projecting ring collar (74) is delimited on the inner side by a cylindrical surface (75) and on the outer side by an inclined surface (76), which tapers approximately frustoconically in the direction towards the valve member (16).
- Exhaust-gas recirculation valve according to Claim 2, characterized in that the angle at which the outer inclined surface (76) tapers is approximately 60°.
- Exhaust-gas recirculation valve according to one of Claims 1 to 3, characterized in that the ring collar (74) projects axially by a distance of about 0.2 mm beyond the end face (77) of the valve seat (15) which adjoins it on the outside.
- Exhaust-gas recirculation valve according to one of Claims 1 to 4, charactrized in that the cross-sectional thickness, measured in the radial direction, of the ring collar (74) is in the region of approximately 0.6 mm.
- Exhaust-gas recirculation valve according to one of Claims 2 to 5, characterized in that the diameter of the inner-side cylindrical surface (75) is in the region of approximately 16 mm, and the diameter of the outer-side inclined surface (76) is in the region of approximately 16.6 mm.
- Exhaust-gas recirculation valve according to one of Claims 1 to 6, characterized in that the angle of the slightly frustoconical valve seat face (73) of the ring collar (74) is in the region of approximately 10°.
- Exhaust-gas recirculation valve according to one of Claims 1 to 7, characterized in that the frustoconical ring surface (53) of the valve member (16), by means of which the latter rests on the frustoconical valve seat face (73) in the closed state, runs at an angle of approximately 10°.
- Exhaust-gas recirculation valve according to one of Claims 1 to 8, characterized in that the external diameter of the frustoconical ring face (53) of the valve member (16) approximately corresponds to the external diameter of the valve seat face (73).
- Exhaust-gas recirculation valve according to one of Claims 1 to 9, characterized in that the external diameter of the frustoconical ring face (53) of the valve member (16) is in the region of approximately 16.6 mm.
- Exhaust-gas recirculation valve according to one of Claims 1 to 10, characterized in that the internal diameter of the frustoconical ring face (53) of the valve member (16) is smaller than that of the valve seat face (73) of the ring collar (74).
- Exhaust-gas recirculation valve according to Claim 11, characterized in that the internal diameter of the frustoconical ring face (53) of the valve member (16) is in the region of approximately 15 mm.
- Exhaust-gas recirculation valve according to one of Claims 1 to 12, characterized in that the valve member (16) has an approximately frustoconical outer surface (54), which tapers towards the valve seat (15) and axially adjoins the frustoconical ring face (53) on the outer side.
- Exhaust-gas recirculation valve according to Claim 13, characterized in that the approximately frustoconical outer surface (54) of the valve member (16) runs at an angle of approximately 60°.
- Exhaust-gas recirculation valve according to Claim 13 or 14, characterized in that the external diameter of the approximately frustoconical outer surface (54) of the valve member (16) is in the region of approximately 19 mm.
- Exhaust-gas recirculation valve according to one of Claims 13 to 15, characterized in that the internal diameter of the approximately frustoconical outer surface (54) of the valve member (16) approximately corresponds to the external diameter of the frustoconical ring face (53), for example is in the region of approximately 16.6 mm.
- Exhaust-gas recirculation valve according to one of Claims 1 to 16, characterized in that the valve member (16) has a frustoconical face (55) which adjoins the frustoconical ring face (53) axially on the inner side and tapers in the same direction as the ring face (53).
- Exhaust-gas recirculation valve according to Claim 17, characterized in that the frustoconical face (55) forms an angle in the region of approximately 72°.
- Exhaust-gas recirculation valve according to one of Claims 1 to 18, characterized in that the approximately frustoconical valve seat face (73) is at least slightly concavely curved, and/or in that the approximately frustoconical ring face (53) of the valve member (16) is at least slightly convexly curved, preferably with the same radius of curvature as the valve seat face (73).
- Exhaust-gas recirculation valve according to one of Claims 1 to 19, characterized in that at least the approximately frustoconical ring face (53) and/or the valve seat face (73) are coated, e.g. with plastic.
- Exhaust-gas recirculation valve according to one of Claims 1 to 20, characterized in that the valve member (16), in the closed state, rests, by means of a narrow outer edge region of its frustoconical ring face (53), on the corresponding valve seat face (73) of the ring collar (74).
- Exhaust-gas recirculation valve according to one of Claims 1 to 21, characterized in that the approximately frustoconical ring face (53) of the valve member (16) has a larger external diameter than the approximately frustoconical valve seat face (73) and projects beyond the latter.
- Exhaust-gas recirculation valve according to one of Claims 1 to 22, characterized in that the valve seat (15) is formed from a substantially cylindrical bush (51) which is inserted into the housing (11).
- Exhaust-gas recirculation valve according to Claim 23, characterized in that the bush (51), at its end which faces the inlet region (13), has an inner frustoconical face (52) which tapers towards the valve member (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19711199A DE19711199A1 (en) | 1997-03-19 | 1997-03-19 | Exhaust gas recirculation valve for an internal combustion engine |
| DE19711199 | 1997-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0866220A1 EP0866220A1 (en) | 1998-09-23 |
| EP0866220B1 true EP0866220B1 (en) | 2002-06-05 |
Family
ID=7823745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97120115A Expired - Lifetime EP0866220B1 (en) | 1997-03-19 | 1997-11-17 | Exhaust gas recirculation valve for a combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0866220B1 (en) |
| DE (2) | DE19711199A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19825656A1 (en) * | 1998-06-09 | 1999-12-16 | Wahler Gmbh & Co Gustav | Exhaust gas recirculation valve for internal combustion engines |
| US7104523B2 (en) * | 2004-06-12 | 2006-09-12 | Borgwarner Inc. | Valve having contamination counter-measures |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3981283A (en) * | 1974-09-03 | 1976-09-21 | Ford Motor Company | Engine exhaust gas recirculating control |
| US4497335A (en) * | 1979-12-21 | 1985-02-05 | Toyota Jidosha Kogyo Kabushiki Kaisha | Control valve of exhaust gas recirculation apparatus |
| DE3047036C2 (en) * | 1980-12-13 | 1983-01-20 | Pierburg Gmbh & Co Kg, 4040 Neuss | EGR control valve |
| JPH03267563A (en) * | 1990-03-16 | 1991-11-28 | Taiho Kogyo Co Ltd | Exhaust gas recirculation device |
| DE4009923C2 (en) * | 1990-03-28 | 1995-11-02 | Fev Motorentech Gmbh & Co Kg | Valve for metering the exhaust gas recirculation flow in internal combustion engines |
| DE29612465U1 (en) | 1996-07-18 | 1996-09-05 | Gustav Wahler Gmbh U. Co, 73730 Esslingen | Exhaust gas recirculation valve for an internal combustion engine |
-
1997
- 1997-03-19 DE DE19711199A patent/DE19711199A1/en not_active Withdrawn
- 1997-11-17 DE DE59707413T patent/DE59707413D1/en not_active Expired - Lifetime
- 1997-11-17 EP EP97120115A patent/EP0866220B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59707413D1 (en) | 2002-07-11 |
| DE19711199A1 (en) | 1998-09-24 |
| EP0866220A1 (en) | 1998-09-23 |
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