EP0717185B1 - Exhaust gas recirculation valve - Google Patents
Exhaust gas recirculation valve Download PDFInfo
- Publication number
- EP0717185B1 EP0717185B1 EP95115121A EP95115121A EP0717185B1 EP 0717185 B1 EP0717185 B1 EP 0717185B1 EP 95115121 A EP95115121 A EP 95115121A EP 95115121 A EP95115121 A EP 95115121A EP 0717185 B1 EP0717185 B1 EP 0717185B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- pipe
- gas recirculation
- recirculation valve
- valve according
- 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/55—Systems for actuating EGR valves using vacuum actuators
- F02M26/58—Constructional details of the actuator; Mounting thereof
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/18—Thermal insulation or heat protection
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
-
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
-
- 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
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
-
- 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
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/48—EGR valve position sensors
-
- 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
- F02M26/72—Housings
Definitions
- the invention relates to an exhaust gas recirculation valve according to claim 1 off.
- a pipe part is provided that as an adapter for use in an air line is designed.
- the pipe part points to one Side an opening in the pipe wall through which a with of the exhaust gas recirculation line connected inside the Tube is insertable.
- This nozzle has a flange over which it is sealed with a flange surrounding the opening is connected.
- a guide socket is formed for tight guidance a stem, at the end of which a valve disk is attached that cooperates with the opening of the nozzle.
- the shaft is at its end protruding from the tube connected to a pneumatic actuator.
- This exhaust valve must on the one hand in a complex manner in the air line the internal combustion engine to be fitted, and on the other it is to assemble with a complex assembly work.
- Such exhaust gas recirculation valves are used for metering Exhaust gas recirculation quantities caused by opening or closing the exhaust valve can be controlled via the actuator. For exact It is also dosing the exhaust gas recirculation quantities necessary to measure the recirculated exhaust gas quantities. Only then can the exhaust gas recirculation quantities be precisely regulated respectively. Ultimately, such a measurement also gives Conclusion about the functionality of the exhaust gas recirculation valve. Such a device is in the known exhaust gas recirculation valve not provided.
- the exhaust gas recirculation valve according to the invention has the advantage that a measurement of exhaust gas recirculation quantities is possible and that is also one of the actual inflow point of recirculated exhaust gas immediately adjacent Point is used to record the exhaust gas recirculation quantities.
- the exhaust gas recirculation quantity via the nozzle is introduced directly into the fresh air flow the advantage that the measuring point by the air flow on very is effectively cooled without additional measures must be taken. This ensures the security of the measurement improved.
- valve member together with its actuator an opening provided in the tube can be used while doing so at the same time a connection can be established with the measuring point on the nozzle.
- the actuator and valve member are easy to pre-assemble and simple into the tube, which is part of the intake system of the Internal combustion engine can be used.
- the pipe can on the other hand, a further part of the exhaust gas recirculation line be, with the same advantageous mounting options surrender.
- the valve member and the nozzle is combined into one structural unit, so that this unit in a simple way from one side the pipe can be used in pre-assembled form.
- the exhaust gas recirculation valve is not connected to a measuring point on Is provided.
- the development according to claim 3 has the advantage that the recording of the measured variables and their evaluation on separate Places can be done. According to patent claim 3 the evaluation device outside the pipe to the actuator assigned. This avoids long line connections and has the advantage of being compact.
- claim 4 is as a device for receiving the Measured values for the exhaust gas recirculation quantities a cross-sectional narrowing provided on the exhaust pipe, and it will be the Pressures detected upstream and downstream of the cross-sectional constriction evaluated.
- This can either be arranged locally on the nozzle Pressure sensors take place or take place in that 5 control openings upstream and downstream the cross-sectional constriction are provided, which prevail there Pressure via pipes to the evaluation device on Forward actuator.
- These pipelines can in a particularly advantageous manner according to claim 7 in the connecting part connecting the actuator to the nozzle be integrated. This results in a special one compact unit that is very easy to fit into one can install existing pipe on the internal combustion engine.
- FIG. 1 shows a first longitudinal section through the pipe together with the exhaust gas recirculation valve and FIG. 2 a section perpendicular to the representation of Figure 1.
- a pipe 1 which is part of an air intake system Internal combustion engine can be or in one version with a smaller diameter part of an exhaust gas recirculation line can be.
- This tube has one in its peripheral wall first pipe socket 2, which has a first opening 3 in the Wall of the tube 1 forms and the first pipe socket 2 diametrically opposite a second pipe socket 4, the forms a second opening 5 in the wall of the tube 1.
- the diameter of the first opening 3 is larger than that Diameter of the second opening 5.
- the second pipe socket 4 is drawn in at its extreme outer end Formation of an annular, pointing inside the tube 1 Shoulder 7.
- a liner Seal 8 is a closing part 9 formed from sheet metal with a flange-shaped radially outward-facing formation 10 for Investment.
- the locking part is thereby forming a recess formed approximately frustoconical in the course of the tube and at its opposite the formation 10 End firmly connected to a plate 11, for.
- the nozzle 12 protrudes diametrically and coaxially to the first opening 3 and second opening 5 into the tube 1 and instructs a valve seat at its inner end on the front side 16 on which a valve plate 17 of a valve member 18 of the Exhaust gas recirculation valve according to the invention comes to the plant.
- the Valve plate sits at the end of one valve stem 19, the other End in a housing 21 of an actuator 22 out is. This is with its housing 22 under tight Closure of the opening 3 used in the first pipe socket 2.
- the actuator is in the example shown from a pneumatically working pressure can with a adjusting membrane 23 clamped between housing halves, with the end 25 of the valve stem by suitable means 24 connected is.
- These means include a dimensionally stable spring plate 26, which is used to fix the molded neck of the Control membrane 23 has a blind hole 27 into which the valve stem is pressed in with a fir tree profile.
- the connector 36 and the housing 21 of the actuator 22 are made in two parts and successively inserted into the opening 3 of the first pipe socket will. Corresponding seals are between these two parts required.
- the connector 36 then has an axial opening 39 which is so large that the valve plate 17 can be passed. After touchdown the housing 21 of the actuator is then again the tube 1 is tightly sealed to the outside.
- the implementation of the valve stem to the control membrane not be completely sealed, since between the diaphragm 23 and Part of the valve stem on the valve side is connected to the environment Reference pressure space is available.
- the connecting part is preferably made of embossed Sheet metal parts assembled. Also the closing part 9 and the neck 12 are preferably stamped from sheet metal. Against that in the case where in particular the pipe 1 for feeding of air with exhaust gas supplied via the exhaust valve, the housing 21 of the actuator 22 injection molded plastic parts exist because of the intensive cooling the supplied air flow the supplied via the exhaust gas recirculation Heat is quickly transported away. Even the connecting part 32, especially in the event that electronic Pressure transducers on the nozzle are also provided optimally cooled by the passing air, so that here the best conditions for a measured value recording at low Requirements for the transmitter are possible. Advantageous here is the funnel-shaped design of the Closing part 9, which has an even longer flushing length for allows the nozzle 12.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Sampling And Sample Adjustment (AREA)
- Fluid-Driven Valves (AREA)
Description
Die Erfindung geht von einem Abgasrückführventil gemäß Anspruch 1 aus. Bei einem solchen durch die DE-C 43 25 169 bekannten Abgasrückführventil ist ein Rohrleitungsteil vorgesehen, das als Zwischenstück zum Einsatz in eine Luftleitung konzipiert ist. Das Rohrleitungsteil weist auf der einen Seite eine Öffnung in der Rohrwandung auf, durch die ein mit der Abgasrückführleitung verbundener Stutzen ins Innere des Rohres einführbar ist. Dieser Stutzen hat einen Flansch, über den er mit einem die Öffnung umgebenden Flansch dicht verbunden wird. Gegenüberliegend vom Stutzen ist in der Wand des Rohres ein Führungsstutzen ausgeformt zur dichten Führung eines Schaftes, an dessen Ende ein Ventilteller angebracht ist, der mit der Öffnung des Stutzens zusammenwirkt. Der Schaft ist an seinen aus dem Rohr herausragenden Ende mit einem pneumatischen Stellantrieb verbunden. Dieses Abgasventil muß zum einen in aufwendiger Weise in die Luftleitung der Brennkraftmaschine eingepaßt werden, und zum anderen ist es mit einer aufwendigen Montagearbeit zusammenzubauen. Solche Abgasrückführventile dienen der Dosierung von Abgasrückführmengen, die durch Öffnen oder Schließen des Abgasventils über den Stellantrieb gesteuert werden. Zur genauen Dosierung der Abgasrückführmengen ist es darüber hinaus erforderlich, die rückgeführten Abgasmengen auch zu messen. Nur dann kann eine genaue Regelung der Abgasrückführmengen erfolgen. Eine solche Messung gibt letztlich auch Rückschluß über die Funktionsfähigkeit des Abgasrückführventils. Eine solche Einrichtung ist bei dem bekannten Abgasrückführventil nicht vorgesehen.The invention relates to an exhaust gas recirculation valve according to claim 1 off. In such a known from DE-C 43 25 169 Exhaust gas recirculation valve, a pipe part is provided that as an adapter for use in an air line is designed. The pipe part points to one Side an opening in the pipe wall through which a with of the exhaust gas recirculation line connected inside the Tube is insertable. This nozzle has a flange over which it is sealed with a flange surrounding the opening is connected. Opposite the neck is in the wall of the tube a guide socket is formed for tight guidance a stem, at the end of which a valve disk is attached that cooperates with the opening of the nozzle. The shaft is at its end protruding from the tube connected to a pneumatic actuator. This exhaust valve must on the one hand in a complex manner in the air line the internal combustion engine to be fitted, and on the other it is to assemble with a complex assembly work. Such exhaust gas recirculation valves are used for metering Exhaust gas recirculation quantities caused by opening or closing the exhaust valve can be controlled via the actuator. For exact It is also dosing the exhaust gas recirculation quantities necessary to measure the recirculated exhaust gas quantities. Only then can the exhaust gas recirculation quantities be precisely regulated respectively. Ultimately, such a measurement also gives Conclusion about the functionality of the exhaust gas recirculation valve. Such a device is in the known exhaust gas recirculation valve not provided.
Das erfindungsgemäße Abgasrückführventil hat demgegenüber den Vorteil, daß eine Messung von Abgasrückführmengen möglich ist und daß darüber hinaus eine der tatsächlichen Einströmstelle von rückgeführtem Abgas unmittelbar benachbarte Stelle zur Erfassung der Abgasrückführmengen verwendet wird. Insbesondere, wenn die Abgasrückführmenge über den Stutzen direkt in den Frischluftstrom eingeführt wird, ergibt sich der Vorteil, daß die Meßstelle durch den Luftstrom auf sehr effektive Weise gekühlt wird, ohne daß zusätzliche Maßnahmen getroffen werden müssen. Damit wird die Sicherheit der Messung verbessert.In contrast, the exhaust gas recirculation valve according to the invention has the advantage that a measurement of exhaust gas recirculation quantities is possible and that is also one of the actual inflow point of recirculated exhaust gas immediately adjacent Point is used to record the exhaust gas recirculation quantities. In particular, if the exhaust gas recirculation quantity via the nozzle is introduced directly into the fresh air flow the advantage that the measuring point by the air flow on very is effectively cooled without additional measures must be taken. This ensures the security of the measurement improved.
In besonders vorteilhafter Weiterbildung gemäß Patentanpruch
2 ist das Ventilglied zusammen mit seinem Stellantrieb durch
eine in dem Rohr vorgesehene Öffnung einsetzbar und dabei
zugleich eine Verbindunc mit der Meßstelle am Stutzen herstellbar.
Dies hat den Vorteil, daß Stellantrieb und Ventilglied
in vereinfachter Weise vormontierbar sind und einfach
in das Rohr, das beispielsweise Teil des Ansaugsystems der
Brennkraftmaschine sein kann, einsetzbar ist. Das Rohr kann
andererseits auch ein weiterführender Teil der Abgasrückführleitung
sein, wobei sich dieselben vorteilhaften Montagemöglichkeiten
ergeben. In Weiterbildung dieser Ausgestaltung
ist gemäß Patentanspruch 7 der Stellantrieb, das Ventilglied
und der Stutzen zu einer Baueinheit zusammengefaßt,
so daß diese Einheit in einfacher Weise von der einen Seite
des Rohres her in vormontierter Form einsetzbar ist. Dies
ist gemäß Patentanspruch 12 auch dann besonders vorteilhaft,
wenn das Abgasrückführventil nicht mit einer Meßstelle am
Stutzen versehen ist.In a particularly advantageous development according to the
Die Weiterbildung gemäß Patentanspruch 3 hat den Vorteil,
daß die Aufnahme der Meßgrößen und deren Auswertung an getrennten
Stellen erfolgen kann. So ist gemäß Patentanpruch 3
die Auswerteeinrichtung außerhalb des Rohres dem Stellantrieb
zugeordnet. Das vermeidet lange Leitungsverbindungen
und hat den Vorteil, eine kompakte Anordnung zu bilden.The development according to
Gemäß Patentanspruch 4 ist als Einrichtung zur Aufnahme der
Meßwerte für die Abgasrückführmengen eine Querschnittsverengung
am Abgasstutzen vorgesehen, und es werden dabei die
Drücke stromauf und stromab der Querschnittsverengung erfaßt
ausgewertet. Dies kann entweder durch örtlich am Stutzen angeordnete
Drucksensoren erfolgen oder dadurch erfolgen, daß
gemäß Patentanspruch 5 Steueröffnungen stromauf und stromab
der Querschnittverengung vorgesehen sind, die den dort herrschenden
Druck über Rohrleitungen zur Auswerteeinrichtung am
Stellantrieb weiterleiten. Diese Rohrleitungen können dabei
in besonders vorteilhafter Weise gemäß Patentanspruch 7 in
dem den Stellantrieb mit dem Stutzen verbindenden Verbindungsteil
integriert sein. Es ergibt sich somit eine besonders
kompakt aufgebaute Einheit, die sich sehr leicht in ein
vorhandenes Rohr an der Brennkraftmaschine einbauen läßt.
Besondere Vorteile ergeben sich dabei dadurch, daß diese
kompakte Einheit auch gemäß Patentanspruch 17 in das Luftansaugsystem
der Brennkraftmaschine einbaubar ist, wobei der
Abgasrückführmengen führenden Stutzen optimal gekühlt wird
zusammen mit eventuell vorgesehen Drucksensoren direkt am
Stutzen. Weiterhin ist der Stellantrieb in diesem Fall nicht
mehr dem heißen Abgas ausgesetzt, sondern wird ebenfalls
durch die strömende Luft im Luftansaugrohr gekühlt derart,
daß der Stellantrieb aus Kunststoffspritzteilen gebaut werden
kann, was besonders wirtschaftlich ist.According to claim 4 is as a device for receiving the
Measured values for the exhaust gas recirculation quantities a cross-sectional narrowing
provided on the exhaust pipe, and it will be the
Pressures detected upstream and downstream of the cross-sectional constriction
evaluated. This can either be arranged locally on the nozzle
Pressure sensors take place or take place in that
5 control openings upstream and downstream
the cross-sectional constriction are provided, which prevail there
Pressure via pipes to the evaluation device on
Forward actuator. These pipelines can
in a particularly advantageous manner according to claim 7 in
the connecting part connecting the actuator to the nozzle
be integrated. This results in a special one
compact unit that is very easy to fit into one
can install existing pipe on the internal combustion engine.
Particular advantages result from the fact that these
compact unit also according to
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 einen ersten Längsschnitt durch das Rohr zusammen mit dem Abgasrückführventil und Figur 2 einen Schnitt senkrecht zur Darstellung gemäß Figur 1.An embodiment of the invention is in the drawing shown and is described in more detail in the following description explained. 1 shows a first longitudinal section through the pipe together with the exhaust gas recirculation valve and FIG. 2 a section perpendicular to the representation of Figure 1.
Bei dem in der Zeichnung wiedergegebenen Ausführungsbeispiel
ist ein Rohr 1 gezeigt, das Teil eines Luftansaugsystems einer
Brennkraftmaschine sein kann oder auch bei einer Ausführung
mit geringerem Durchmesser Teil einer Abgasrückführleitung
sein kann. Dieses Rohr weist in seiner Umfangswand einen
ersten Rohrstutzen 2, der eine erste Öffnung 3 in der
Wand des Rohres 1 bildet und dem ersten Rohrstutzen 2 diametral
gegenüberliegend einen zweiten Rohrstutzen 4 auf, der
eine zweite Öffnung 5 in der Wand des Rohres 1 bildet. Der
Durchmesser der ersten Öffnung 3 ist dabei größer als der
Durchmesser der zweiten Öffnung 5. Der zweite Rohrstutzen 4
ist an seinem äußersten außenliegenden Ende eingezogen unter
Bildung einer ringförmigen, ins Innere des Rohres 1 weisenden
Schulter 7. An dieser kommt unter Zwischenlage einer
Dichtung 8 ein aus Blech geformtes Schließteil 9 mit einer
flanschförmigen radial auswärts weisenden Ausformung 10 zur
Anlage. Das Schließteil ist dabei unter Bildung einer Ausnehmung
im Verlauf des Rohres in etwa kegelstumpfförmig ausgebildet
und an seinem der Ausformung 10 gegenüberliegenden
Ende mit einer Platte 11 fest verbunden, z. B. verlötet, an
der konzentrisch zum Schließteil 9 innenliegend zusätzlich
das Ende eines Stutzens 12 befestigt ist. Dieser kann ebenfalls
mit der Platte verlötet werden und umschließt eine
Durchgangsbohrung 13 der Platte, die einen durchmessergleichen
Durchtritt zum Durchmesser einer an die Platte 11 angeflanschten
Rückführleitung 14 bildet.In the embodiment shown in the drawing
a
Der Stutzen 12 ragt diametral und koaxial zur ersten Öffnung
3 und zweiten Öffnung 5 in das Rohr 1 hinein und weist an
seinem innenliegenden Ende an der Stirnseite ein Ventilsitz
16 auf, an dem ein Ventilteller 17 eines Ventilglieds 18 des
erfindungsgemäßen Abgasrückführventils zur Anlage kommt. Der
Ventilteller sitzt am Ende eines Ventilschaftes 19, der anderen
Endes in einem Gehäuse 21 eines Stellantriebs 22 geführt
ist. Dieser ist mit seinem Gehäuse 22 unter dichtem
Verschluß der Öffnung 3 in den ersten Rohrstutzen 2 eingesetzt.
Der Stellantrieb besteht dabei im ausgeführten Beispiel
aus einer pneumatisch arbeitenden Druckdose mit einer
zwischen Gehäusehälften eingespannten Stellmembran 23, mit
der durch geeignete Mittel 24 das Ende 25 des Ventilschaftes
verbunden ist. Diese Mittel umfassen einen formstabilen Federteller
26, der zur Fixierung des ausgeformten Halses der
Stellmembran 23 ein Sackloch 27 aufweist, in den der Ventilschaft
mit einem Tannenbaumprofil eingepreßt ist.The
In dem von der Stellmembran 23 im Gehäuse 21 eingeschlossenen
Arbeitsraum 28 ist eine Rückführfeder 29 eingespannt,
die sich zwischen dem Federteller und dem Gehäuse abstützt.
Über eine Druckleitung 30 wird dem Arbeitsraum 29 der entsprechende
Steuerdruck zugeführt.In the enclosed by the
In weiterer Ausgestaltung des Abgasrückführventils nach Figur
1 ist der Figur 2 in einem anderen Schnitt zu entnehmen,
daß der Stutzen 12 zusammen mit Schließteil 9 und Platte 11
über ein Verbindungsteil 32 mit dem Gehäuse 21 des Stellantriebs
22 verbunden ist. Dieses Verbindungsteil besteht aus
einem den Stutzen 12 von außen umfassenden Teil 33, in den
eine erste Rohrleitung 34 und eine zweite Rohrleitung 35
eingeschlossen sind. Diese Rohrleitungen verlaufen versetzt
zum Stutzen 12, achsparallel zu diesem, zur ersten Öffnung 3
hin und münden dort in ein Verbindungsstück 36, das seinerseits
wieder mit dem Gehäuse 21 bzw. über dieses mit dem
Rohrstutzen verbunden ist. Zwischen diesem und dem Gehäuse
21 werden Druckräume 37 und 38 eingeschlossen, die Verbindung
zu einer nicht weiter dargestellten Auswerteeinrichtung
der Druckdifferenz zwischen den über die erste Rohrleitung
34 in den Druckraum 37 und dem über die zweite Rohrleitung
35 in den Druckraum 38 gelangenden Drücke haben. Die erste
und die zweite Rohrleitung 34, 35 sind dabei fest mit dem
Verbindungsteil 32 und dem Gehäuse 21 verbunden, so daß
diese zusammen mit dem Stutzen 12, dem Schließteil 9 und der
Platte 11 ein gemeinsam zu handhabendes Teil bilden derart,
daß dieses Teil durch die erste Öffnung 3 hindurch in das
Rohr 1 eingeführt werden kann und aus diesem wieder heraus
durch die zweite Öffnung 5 zum Teil wieder hinausgeführt
werden kann, bis das Schließteil 9 über die Dichtung 8 an
der ringförmigen Schulter 7 zur Anlage kommt. In diesem
Punkt hat dann das Gehäuse 21 des Stellantriebs 22 auch die
erste Öffnung 3 dicht verschlossen. Auf diese Art und Weise
läßt sich das Abgasrückführventil in sehr einfacher Weise in
das Rohr 1 einsetzen, was die Montage erheblich vereinfacht
und auch die Kosten zur Ausführung des Abgasrückführventiles
senkt.In a further embodiment of the exhaust gas recirculation valve according to the figure
1 can be seen in a different section from FIG. 2,
that the
Denkbar ist dabei, daß das Verbindungsstück 36 und das Gehäuse
21 des Stellantriebs 22 zweiteilig ausgeführt sind und
nacheinander in die Öffnung 3 des ersten Rohrstutzens eingesetzt
werden. Dabei sind entsprechende Dichtungen zwischen
diesen beiden Teilen erforderlich. Das Verbindungsstück 36
hat dann einen axialen Durchbruch 39, der so groß ist, daß
der Ventilteller 17 hindurchgeführt werden kann. Nach Aufsetzen
des Gehäuses 21 des Stellantriebs ist dann wiederum
das Rohr 1 dicht nach außen verschlossen. Dabei braucht jedoch
die Durchführung des Ventilschaftes zur Stellmembran
nicht völlig dicht sein, da zwischen Stellmembran 23 und
Ventilschaftseitigem Gehäuseteil ein mit der Umwelt verbundener
Referenzdruckraum vorhanden ist.It is conceivable that the
Mit einem derart ausgestalteten Abgasrückführventil ist es
möglich, die zugeführte Abgasrückführmenge zu messen, indem
zwischen der Einmündung 40 der ersten Rohrleitung 34 ins Innere
des Stutzens 12 und der Einmündung 41 der zweiten Rohrleitung
35 ins Innere des Stutzens eine Durchmesserverengung
43 vorgesehen ist, durch die zwischen stromaufwärts und dem
stromabwärts desselben liegenden Stutzenbereichen ein Differenzdruck
gebildet ist, der in bekannter Weise abhängig ist
von der durchströmenden Menge, in diesem Fall der durchströmenden
Abgasrückführmenge. Die sich einstellenden Drücke
werden durch die oben beschriebene Auswerteeinrichtung erfaßt.It is with an exhaust gas recirculation valve designed in this way
possible to measure the exhaust gas recirculation quantity supplied by
between the
Denkbar ist es ferner, daß diese Drücke bereits an Ort und
Stelle durch elektronische Druckaufnehmer erfaßt werden, deren
Meßwerte über Anschlußleitungen, die in einem vergleichsweise
ausgebildeten Verbindungsteil 32 zum Stellantrieb
22 hin herausgeführt werden und dort einer entsprechenden
Steuereinrichtung zugeführt werden.It is also conceivable that these pressures are already in place and
Be detected by electronic pressure transducers, the
Measured values over connecting lines, in a comparatively
trained connecting
Das Verbindungsteil, insbesondere bei der Ausführung der in
der Figur 2 gezeigten Art, wird vorzugsweise aus geprägten
Blechteilen aufgebaut. Auch das Schließteil 9 und der Stutzen
12 werden vorzugsweise aus Blech geprägt. Dagegen kann
in dem Fall, in dem insbesondere das Rohr 1 zur Zuführung
von Luft mit über das Abgasventil zugeführtem Abgas dient,
das Gehäuse 21 des Stellantriebs 22 ausgespritzten Kunststoffteilen
bestehen, da durch die intensive Kühlung durch
den zugeführten Luftstrom die über die Abgasrückführung zugeführte
Wärme schnell wegtransportiert wird. Auch das Verbindungsteil
32, insbesondere für den Fall, daß elektronische
Druckaufnehmer am Stutzen vorgesehen sind, wird ebenfalls
optimal durch die vorbeistreichende Luft gekühlt, so
daß hier beste Bedingungen für eine Meßwertaufnahme bei geringen
Anforderungen an den Meßwertgeber möglich sind. Vorteilhaft
ist hier die trichterförmige Ausgestaltung des
Schließteils 9, die eine noch längere Umspülungslänge für
den Stutzen 12 ermöglicht.The connecting part, especially when executing the in
the type shown in Figure 2, is preferably made of embossed
Sheet metal parts assembled. Also the
Claims (18)
- Exhaust gas recirculation valve for controlling exhaust gas recirculation quantities which are supplied to the induction side of an internal combustion engine, having a stub pipe (12) which protrudes into a pipe (1), which is connected to the exhaust gas collecting system, which forms part of an exhaust gas recirculation conduit (14) and on whose end-face opening is formed a valve seat (16) with which a valve element (18) actuated by an actuator (22) interacts, characterized in that at least one part of a measuring device in the form of a measurement recording device for recording exhaust gas quantities supplied through the exhaust gas recirculation valve is arranged on the stub pipe (12) upstream of the opening into the pipe (1).
- Exhaust gas recirculation valve according to Claim 1, characterized in that the valve element (18) is configured as a disc valve element with a valve disc (17) at the end of a valve stem (19) which protrudes into the pipe (1) through an opening (3), opposite the stub pipe (12), in the wall of the pipe and the actuator (22) is releasably connected to the pipe in the region of the opening (3) and has a permanent connection to that part (32) on the stub pipe (12) which forms at least part of the measuring device.
- Exhaust gas recirculation valve according to Claim 1 or 2, characterized in that an analysis device for the measurement recorded is associated, as another part of the measuring device, with the actuator (22).
- Exhaust gas recirculation valve according to Claim 3, characterized in that the measurement recording device is a cross-sectional contraction (43) which is arranged in the stub pipe (12) upstream of the valve seat (16), respective pressure recorders (40, 41) being arranged in the wall of the stub pipe upstream and downstream of the contraction, which pressure recorders (40, 41) are connected by respective conduits (34, 35) to the casing of the actuator (22), which casing is connected to the pipe and the analysis device.
- Exhaust gas recirculation valve according to Claim 4, characterized in that the pressure recorders are openings (40, 41) in the wall of the stub pipe from pipe conduits (34, 35) which are connected to the analysis device by means of the casing (21) of the actuator (22) and the analysis device contains a differential pressure sensor.
- Exhaust gas recirculation valve according to Claim 5, characterized in that the analysis device is integrated in the casing (21).
- Exhaust gas recirculation valve according to Claims 3 to 6, characterized in that a second opening (5), diametrically opposite the opening in the wall of the pipe (1), considered as a first opening (3), is provided in the wall of the pipe (1), and the stub pipe (12), together with a closing part (9) positioning the stub pipe (12) and closing the second opening (5), can be fed through the first opening (3), the stub pipe (12) being rigidly connected to the casing (21) by means of a connecting part (32) accommodating the conduits (34, 35).
- Exhaust gas recirculation valve according to Claim 7, characterized in that the connecting part (32) consists of stamped sheet-metal parts joined together, which parts are permanently connected to the stub pipe, on the one hand, and to the casing (21), on the other.
- Exhaust gas recirculation valve according to Claim 8, characterized in that the cross-sectional contraction (43) on the stub pipe (12) is manufactured by deforming the stub pipe wall.
- Exhaust gas recirculation valve according to Claim 9, characterized in that the stub pipe (12) and the closing part (9) are manufactured from thin-walled sheet metal and are permanently and rigidly connected together by means of a plate (11) which is also used for connecting the stub pipe to the exhaust gas recirculation conduit (14).
- Exhaust gas recirculation valve according to Claim 10, characterized in that the closing part (9) forms a recess in the run of the pipe with the stub pipe (12) freely protruding into the pipe (1) through this recess.
- Exhaust gas recirculation valve according to Claim 2, characterized in that a second opening (5), opposite to the first opening (3), is provided in the wall of the pipe (1), which opening (5) can be closed by a closing part (9) which is permanently connected to the stub pipe (12) to position the latter and, together with the stub pipe (12), can be inserted into the pipe (1) through the first opening (3).
- Exhaust gas recirculation valve according to Claim 12, characterized in that conduits (34, 35) lead from that part of the measuring device which is on the stub pipe via a connecting part (32) and the casing (21) of the actuator (22) to an analysis device for the values recorded by the measuring device.
- Exhaust gas recirculation valve according to Claim 12 or 13, characterized in that the stub pipe (12) and the closing part (9) are manufactured from thin-walled sheet metal and are permanently and rigidly connected together by means of a plate (11) which is also used for connecting the stub pipe (12) to the exhaust gas recirculation conduit (14).
- Exhaust gas recirculation valve according to Claim 14, characterized in that the connecting part (32) consists of stamped sheet-metal parts joined together, which parts are permanently connected to the stub pipe, on the one hand, and to the casing, on the other.
- Exhaust gas recirculation valve according to Claim 15, characterized in that the closing part (9) forms a recess in the run of the pipe (1) with the stub pipe (12) freely protruding into the pipe through this recess.
- Exhaust gas recirculation valve according to one of the preceding claims, characterized in that the pipe (1) is part of the air induction system of the internal combustion engine.
- Exhaust gas recirculation valve according to Claim 16, characterized in that the casing (21) accommodating the actuator (22) is manufactured from plastic.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4441091 | 1994-11-18 | ||
DE4441091A DE4441091A1 (en) | 1994-11-18 | 1994-11-18 | Exhaust gas recirculation valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0717185A1 EP0717185A1 (en) | 1996-06-19 |
EP0717185B1 true EP0717185B1 (en) | 1998-03-25 |
Family
ID=6533570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95115121A Expired - Lifetime EP0717185B1 (en) | 1994-11-18 | 1995-09-26 | Exhaust gas recirculation valve |
Country Status (4)
Country | Link |
---|---|
US (1) | US5609143A (en) |
EP (1) | EP0717185B1 (en) |
JP (1) | JPH08210197A (en) |
DE (2) | DE4441091A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19549107A1 (en) * | 1995-12-29 | 1997-07-03 | Bosch Gmbh Robert | Device for exhaust gas recirculation with a closing element which can be actuated in the intake duct |
US5669364A (en) * | 1996-11-21 | 1997-09-23 | Siemens Electric Limited | Exhaust gas recirculation valve installation for a molded intake manifold |
US7871325B2 (en) * | 1997-02-07 | 2011-01-18 | Okuniewicz Douglas M | Means for generating a supplement bonus for an electronic gaming device |
DE19725668C1 (en) * | 1997-06-18 | 1998-10-29 | Daimler Benz Ag | Exhaust gas recirculation circuit for internal combustion engine |
US6073617A (en) * | 1997-07-08 | 2000-06-13 | Siemens Canada Ltd. | Manifold-mounted emission control valve |
US6152115A (en) * | 1997-07-08 | 2000-11-28 | Siemens Canada Limited | Integrated engine intake manifold having a fuel vapor purge valve and an exhaust gas recirculation valve |
US5996559A (en) * | 1997-07-08 | 1999-12-07 | Siemens Canada Limited | Integrated manifold and purge valve |
US6223733B1 (en) | 1997-07-08 | 2001-05-01 | Siemens Canada Limited | Exhaust gas recirculation valve |
US6237547B1 (en) | 1998-09-10 | 2001-05-29 | Yamaha Hatsudoki Kabushiki Kaisha | Engine cooling arrangement |
US6247461B1 (en) * | 1999-04-23 | 2001-06-19 | Delphi Technologies, Inc. | High flow gas force balanced EGR valve |
US6484705B2 (en) * | 2001-02-21 | 2002-11-26 | Delphi Technologies, Inc. | Pintle valve having an internal flow modifier with self-aligning head |
US6655657B2 (en) * | 2001-06-06 | 2003-12-02 | Delphi Technologies, Inc. | Coking-resistant bearing |
FR3104213B1 (en) * | 2019-12-05 | 2022-01-07 | Faurecia Systemes Dechappement | Device for cooling a flow measurement device for an exhaust gas recirculation line |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5325729A (en) * | 1976-08-23 | 1978-03-09 | Nissan Motor Co Ltd | Electronic exhaust gas re-circulation control system |
US4148286A (en) * | 1976-10-01 | 1979-04-10 | Nippon Soken, Inc. | Exhaust gas recirculation system for an internal combustion engine |
JPS5824624B2 (en) * | 1977-09-09 | 1983-05-23 | トヨタ自動車株式会社 | Exhaust gas recirculation device |
DE2940061A1 (en) * | 1979-10-03 | 1981-04-16 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR CONTROLLING THE COMPOSITION OF THE OPERATING MIXTURE IN INTERNAL COMBUSTION ENGINES |
US4399798A (en) * | 1982-01-13 | 1983-08-23 | General Motors Corporation | Exhaust gas recirculation control |
US4566423A (en) * | 1983-12-20 | 1986-01-28 | Eaton Corporation | Electronic feedback EGR valve |
DE3428380A1 (en) * | 1984-08-01 | 1986-03-06 | Robert Bosch Gmbh, 7000 Stuttgart | DEVICE FOR CONTROLLING RECYCLED EXHAUST AMOUNTS IN INTERNAL COMBUSTION ENGINES |
DE3444877A1 (en) * | 1984-08-14 | 1986-04-17 | Robert Bosch Gmbh, 7000 Stuttgart | CONTROL DEVICE FOR AN INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE GASES SUPPLIED FROM THE COMBUSTION AREAS OF A SELF-IGNITION COMBUSTION ENGINE CONSISTING OF AIR AND EXHAUST GAS RECOVERY AMOUNTS |
US4942860A (en) * | 1987-02-06 | 1990-07-24 | Toyota Jidosha Kabushiki Kaisha | Engine control system |
US5163295A (en) * | 1991-09-09 | 1992-11-17 | Eaton Corporation | Controlling exhaust gas recirculation in a pressure boosted internal combustion engine |
US5203313A (en) * | 1992-06-19 | 1993-04-20 | Bundy Corporation | EGR venturi coupler |
DE4227739C2 (en) * | 1992-08-21 | 1998-04-30 | Bayerische Motoren Werke Ag | Mixing valve, in particular exhaust gas recirculation valve of an internal combustion engine |
US5241940A (en) * | 1993-01-07 | 1993-09-07 | Ford Motor Company | Automotive EGR system |
DE4301655C1 (en) * | 1993-01-22 | 1994-02-17 | Schelklingen Metallwarenfab | Combustion engine exhaust-return valve - has housing formed in return pipe end and pipe contracted to form seat adjacent to lateral outlet |
DE4325169C1 (en) * | 1993-07-27 | 1994-09-22 | Bayerische Motoren Werke Ag | Admixing valve, in particular an exhaust-gas recirculation valve of an internal combustion engine |
-
1994
- 1994-11-18 DE DE4441091A patent/DE4441091A1/en not_active Withdrawn
-
1995
- 1995-09-26 DE DE59501699T patent/DE59501699D1/en not_active Expired - Fee Related
- 1995-09-26 EP EP95115121A patent/EP0717185B1/en not_active Expired - Lifetime
- 1995-11-15 JP JP7297062A patent/JPH08210197A/en active Pending
- 1995-11-17 US US08/559,232 patent/US5609143A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5609143A (en) | 1997-03-11 |
EP0717185A1 (en) | 1996-06-19 |
DE59501699D1 (en) | 1998-04-30 |
DE4441091A1 (en) | 1996-05-23 |
JPH08210197A (en) | 1996-08-20 |
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