EP0930428A2 - Exhaust gas recirculation valve - Google Patents

Exhaust gas recirculation valve Download PDF

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Publication number
EP0930428A2
EP0930428A2 EP98120712A EP98120712A EP0930428A2 EP 0930428 A2 EP0930428 A2 EP 0930428A2 EP 98120712 A EP98120712 A EP 98120712A EP 98120712 A EP98120712 A EP 98120712A EP 0930428 A2 EP0930428 A2 EP 0930428A2
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EP
European Patent Office
Prior art keywords
exhaust gas
gas recirculation
valve
recirculation valve
armature
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
Application number
EP98120712A
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German (de)
French (fr)
Other versions
EP0930428B1 (en
EP0930428A3 (en
Inventor
Heinrich Dismon
Dieter Thönnessen
Armin Schürfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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Filing date
Publication date
Priority claimed from DE19848699A external-priority patent/DE19848699A1/en
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP0930428A2 publication Critical patent/EP0930428A2/en
Publication of EP0930428A3 publication Critical patent/EP0930428A3/en
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Publication of EP0930428B1 publication Critical patent/EP0930428B1/en
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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
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • 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
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/69—Lift valves, e.g. poppet valves having two or more valve-closing members

Definitions

  • the invention relates to an exhaust gas recirculation valve according to the preamble of the main claim.
  • Such an exhaust gas recirculation valve known from DE 43 38 192 A1 measures for reduction NOx emissions and to improve consumption in diesel engine exhaust depending on the operating point or map point to the intake engine combustion air.
  • the exhaust gas recirculation valve is in a connecting line between the engine exhaust line and suction line, preferably arranged directly on the suction pipe.
  • the exhaust gas recirculation valve can be operated pneumatically or electrically. When energized the coil builds a magnetic field builds up and moves the armature, which in turn hits a closing spring the valve opens via a valve rod. With the pneumatically operated exhaust gas recirculation valve is connected to the valve stem by applying a vacuum Diaphragm opened the valve against a spring. A reverse direction of work is possible.
  • the valve can be equipped with only one seat, but has in the electrical shown Version for boost pressure compensation (and thus to reduce the required Positioning force) two seats connected in series.
  • the valve is used to meter the amount of exhaust gas returned to the intake air a position control via a potentiometer z. B. from the electromagnetic actuator in brought a defined opening position. With a pneumatic valve with position feedback the pressure in the working chamber is regulated accordingly.
  • exhaust gas recirculation especially of relatively cold exhaust gas, e.g. B. in operating conditions, in which the engine is not yet warm or with exhaust gas cooling with the help of heat exchangers to reduce NOx emissions, deposits occur of soot, paint and condensate in the area of the exhaust gas recirculation valve.
  • the invention is based, these costly and polluting the task Avoid disturbance of the exhaust gas recirculation system.
  • the exhaust gas recirculation valve 1 is mounted on a suction pipe, not shown, in such a way that the exhaust gas inlet 2 is arranged in a chamber separate from the outlets 3.
  • a coil 4 is arranged in the drive head 5. This cooperates with an armature 6, which acts against the force of a spring 7 in Active connection with a valve rod 9 carrying the valve plate 8 is to be brought.
  • the armature 6 interacts with a device 10 for position feedback, the output of which a computer, not shown, which processes further operating parameters is the opening adjustment of the exhaust gas recirculation valve and thus the recirculated Exhaust gas quantity determined.
  • the valve plate 8 cooperate with the valve seats 11.
  • the exhaust gas recirculation valve can also have a valve seat and a valve disk be executed.
  • the valve rod 9 is loaded by a spring 12 in the closing direction. In order to open the exhaust gas recirculation valve even when the valve disc is stuck between To ensure valve seat, the valve works as described below.
  • FIG 4 shows a further embodiment of the exhaust gas recirculation valve according to the invention.
  • the "cracking" of the valve plate (s) 8 is achieved a separate plate magnet armature 6 by a spring 7 from the head 13 and one Plate magnet 15 is spaced.
  • the proportional delivery of the head 13 and thus the proportional opening of the or the valve plate 8 is by a proportional magnet armature 16, which is by a spring 17th is biased against the valve head 13 causes.
  • This embodiment offers the advantage that the plate magnet has high positioning forces the valve opens over short distances, then the proportional magnet armature 16 the proportional Allow delivery.
  • the proportion anchor 16 is therefore not high abrupt forces are loaded, which benefits the service life and the delivery accuracy is coming.
  • an exhaust gas recirculation valve with position feedback the thickness of the deposits on the valve plate and valve seat in an adaptive process step is stored in the computer from time to time, so that the metering accuracy through appropriate consideration in the valve lift.
  • the drive head 5 as Known pneumatic actuator can be formed by a membrane in two Chambers is divided and an attachment attached to the membrane plates the effect of Anchor 6 takes over while storing the kinetic energy during acceleration and strikes the head 13 of the valve rod 9 as soon as the one controlled by a valve Working chamber is subjected to negative pressure.
  • the membrane acts under the effect of arranged in the working chamber spring 7 back to the starting position and the The process can be repeated.
  • the working chamber must be on the valve rod 9 facing side of the drive head 5 and the atmospheric ventilated Opposite chamber.
  • this can Breakaway process described after building up a corresponding intake manifold vacuum after the first revolutions after starting the internal combustion engine.
  • the negative pressure can also be done by a mechanically or electromotively driven vacuum pump be generated.
  • the exhaust gas recirculation valve works, be it electromagnetically or pneumatically driven, like one from the prior art Technology known valve.
  • the drive head is controlled by the computer that the freewheel 'X' run against the force of the spring 7 at the usual actuating speed is so that there is no blow and after reaching the one shown in Fig. 2 Position in which the attachment 14 is operatively connected to the head 13 of the valve rod 9 the actual adjustment process begins, d. H. the exhaust gas recirculation valve 1 will be opened.

Abstract

The exhaust gas return valve for an internal combustion motor has a component (6) which stores kinetic energy. It acts on the head (13) on the free end of the valve stem (9). The component (6) is the armature of an electromagnet which, in the rest position, is held clear of the valve stem head (13) by a spring.

Description

Die Erfindung betrifft ein Abgasrückführventil nach dem Oberbegriff des Hauptanspruchs.The invention relates to an exhaust gas recirculation valve according to the preamble of the main claim.

Ein solches aus der DE 43 38 192 A1 bekanntes Abgasrückführventil misst zur Reduzierung der NOx-Emissionen und zur Verbrauchsverbesserung beim Dieselmotor Motorabgas betriebspunkt- bzw. kennfeldpunktabhängig der angesaugten Motorverbrennungsluft zu. Dazu ist das Abgasrückführventil in eine Verbindungsleitung zwischen Motorabgasleitung und Ansaugleitung, bevorzugt direkt am Sugrohr, angeordnet. Das Abgasrückführventil kann pneumatisch oder elektrisch betätigt werden. Bei Bestromung der Spule baut sich ein Magnetfeld auf und bewegt den Anker, der wiederum gegen eine Schliessfeder über eine Ventilstange das Ventil öffnet. Beim pneumatisch betätigten Abgasrückführventil wird durch Unterdruckbeaufschlagung einer mit der Ventilstange verbundenen Membran das Ventil gegen eine Feder geöffnet. Eine umgekehrte Arbeitsrichtung ist möglich.Such an exhaust gas recirculation valve known from DE 43 38 192 A1 measures for reduction NOx emissions and to improve consumption in diesel engine exhaust depending on the operating point or map point to the intake engine combustion air. For this purpose, the exhaust gas recirculation valve is in a connecting line between the engine exhaust line and suction line, preferably arranged directly on the suction pipe. The exhaust gas recirculation valve can be operated pneumatically or electrically. When energized the coil builds a magnetic field builds up and moves the armature, which in turn hits a closing spring the valve opens via a valve rod. With the pneumatically operated exhaust gas recirculation valve is connected to the valve stem by applying a vacuum Diaphragm opened the valve against a spring. A reverse direction of work is possible.

Das Ventil kann mit nur einem Sitz ausgerüstet sein, hat aber in der dargestellten, elektrischen Ausführung zur Ladedruckkompensation (und damit zur Reduzierung der erforderlichen Stellkraft) zwei in Reihe geschaltete Sitze. Zur kennfeldabhängigen, genaueren Dosierung der zur Ansaugluft zurückgeführten Abgasmenge wird das Ventil mit Hilfe einer Lageregelung über ein Potentiometer z. B. vom elektromagnetischen Stellmotor in eine definierte Öffnungsstellung gebracht. Bei einem pneumatischen Ventil mit Lagerückmeldung wird der Druck in der Arbeitskammer entsprechend geregelt.The valve can be equipped with only one seat, but has in the electrical shown Version for boost pressure compensation (and thus to reduce the required Positioning force) two seats connected in series. For map-dependent, more precise The valve is used to meter the amount of exhaust gas returned to the intake air a position control via a potentiometer z. B. from the electromagnetic actuator in brought a defined opening position. With a pneumatic valve with position feedback the pressure in the working chamber is regulated accordingly.

Durch Abgasrückführung besonders von relativ kaltem Abgas, z. B. bei Betriebsbedingungen, in denen der Motor noch nicht betriebswarm ist oder bei Abgaskühlung mit Hilfe von Wärmetauschern zur Verringerung der NOx-Emissionen, kommt es zu Ablagerung von Russ, Lack und Kondensat im Bereich des Abgasrückführventils. Through exhaust gas recirculation, especially of relatively cold exhaust gas, e.g. B. in operating conditions, in which the engine is not yet warm or with exhaust gas cooling with the help of heat exchangers to reduce NOx emissions, deposits occur of soot, paint and condensate in the area of the exhaust gas recirculation valve.

Diese Rückstände beaufschlagen auch die Dichtflächen am Ventilsitz und Ventilteller und führen in Phasen, in denen das Abgasrückführventil längere Zeit geschlossen ist, wie z. B. beim nächtlichen Abstellen des Fahrzeugs, zu Verklebungen zwischen Ventilsitz und -teller, die die maximale Öffnungskraft des elektromagnetischen Stellmotors bzw. der pneumatischen Membrandose um das Mehrfache übersteigen.
Das Ventil lässt sich nicht mehr öffnen, die Funktion ist vollständig gestört, was die Umwelt belastet und einen Werkstattbesuch erforderlich macht.These residues also act on the sealing surfaces on the valve seat and valve plate and lead in phases in which the exhaust gas recirculation valve is closed for a long time, such as. B. when parking the vehicle at night, to sticking between the valve seat and plate, which exceed the maximum opening force of the electromagnetic servomotor or the pneumatic diaphragm box by a multiple.
The valve can no longer be opened, the function is completely disrupted, which pollutes the environment and necessitates a visit to the workshop.

Der Erfindung liegt die Aufgabe zugrunde, diese kostenträchtige und umweltbelastende Störung des Abgasrückführsystems zu vermeiden.The invention is based, these costly and polluting the task Avoid disturbance of the exhaust gas recirculation system.

Diese Aufgabe wird bei einem gattungsgemässen Abgasrückführventil durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den weiteren Ansprüchen angegeben.This task is performed in a generic exhaust gas recirculation valve by the characteristic Features of claim 1 solved. Advantageous embodiments of the invention are specified in the further claims.

Die Erfindung ist in den Zeichnungen schematisch dargestellt.The invention is shown schematically in the drawings.

Es zeigen im Schnitt:

  • Fig. 1
    ein Abgasrückführventil im Ruhezustand,
  • Fig. 2
    ein Abgasrückführventil im Anschlagzustand,
  • Fig. 3
    ein Abgasrückführventil im geöffneten Zustand,
  • Fig. 4
    eine weitere Ausführungsform des erfindungsgemässen Abgasrückführventils.
    • The average shows:
  • Fig. 1
    an exhaust gas recirculation valve in the idle state,
  • Fig. 2
    an exhaust gas recirculation valve in the stop state,
  • Fig. 3
    an exhaust gas recirculation valve in the open state,
  • Fig. 4
    a further embodiment of the exhaust gas recirculation valve according to the invention.

    • Das Abgasrückführventil 1 ist an einem nicht dargestellten Saugrohr so montiert, dass der Abgaseinlass 2 in einer von den Auslässen 3 getrennten Kammer angeordnet ist. Bei einem elektromagnetischen Abgasrückführventil ist eine Spule 4 im Antriebskopf 5 angeordnet. Diese wirkt mit einem Anker 6 zusammen, der gegen die Kraft einer Feder 7 in Wirkverbindung mit einer die Ventilteller 8 tragenden Ventilstange 9 zu bringen ist.The exhaust gas recirculation valve 1 is mounted on a suction pipe, not shown, in such a way that the exhaust gas inlet 2 is arranged in a chamber separate from the outlets 3. At an electromagnetic exhaust gas recirculation valve, a coil 4 is arranged in the drive head 5. This cooperates with an armature 6, which acts against the force of a spring 7 in Active connection with a valve rod 9 carrying the valve plate 8 is to be brought.

    Der Anker 6 wirkt mit einer Einrichtung 10 zur Lagerückmeldung zusammen, deren Ausgang einem nicht dargestellten, weitere Betriebsparameter verarbeitenden Rechner zugeführt wird, der die Öffnungsverstellung des Abgasrückführventils und damit die rückgeführte Abgasmenge bestimmt. Die Ventilteller 8 wirken mit den Ventilsitzen 11 zusammen. Das Abgassrückführventil kann auch mit einem Ventilsitz und einem Ventilteller ausgeführt sein. Die Ventilstange 9 ist durch eine Feder 12 in Schliessrichtung belastet. Um ein Öffnen des Abgasrückführventils auch bei Verklebung zwischen Ventilteller und Ventilsitz sicherzustellen, arbeitet das Ventil wie nachfolgend beschrieben.The armature 6 interacts with a device 10 for position feedback, the output of which a computer, not shown, which processes further operating parameters is the opening adjustment of the exhaust gas recirculation valve and thus the recirculated Exhaust gas quantity determined. The valve plate 8 cooperate with the valve seats 11. The exhaust gas recirculation valve can also have a valve seat and a valve disk be executed. The valve rod 9 is loaded by a spring 12 in the closing direction. In order to open the exhaust gas recirculation valve even when the valve disc is stuck between To ensure valve seat, the valve works as described below.

    In Ruhestellung ist zwischen dem Anker 6 und dem Kopf 13 der Ventilstange 9 unter Wirkung der zwischen diesen beiden Bauteilen wirkenden Feder 7 ein Freiweg, der mit 'X' in der Fig. 1 bezeichnet ist. Wenn die Magnetspule 4 schlagartig voll mit Strom beaufschlagt wird, so baut sich das Magnetfeld schnell auf und der Anker 6 wird gegen die Feder 7 hoch beschleunigt und schlägt am Ende seines Weges mit z. B. einem Ansatz 14 auf den Kopf 13 der Ventilstange. Bei Stromabschaltung geht der Anker zurück. Durch einmaliges Betätigen oder mehrmaliges Wiederholen dieses Vorgangs in kurzen Abständen 'hämmert' der Anker auf die Ventilstange und eine eventuelle Verklebung zwischen Ventilteller 8 und Ventilsitz 11 wird gelöst. Je nach Programm kann dieses 'Hämmern' stets mit Einschaltung der Zündung erfolgen oder nur dann,w enn bei normaler z. B. pulsweitenmodulierter Ansteuerung des Elektromagneten mit Hilfe eines Soll/Ist-Vergleichs über die Lagerückmeldung festgestellt wurde, dass die Soll-Position nicht eingestellt wurde.In the rest position is between the armature 6 and the head 13 of the valve rod 9 below Effect of the spring 7 acting between these two components, a free travel with 'X' in Fig. 1 is designated. When the solenoid 4 is suddenly fully energized is, the magnetic field builds up quickly and the armature 6 is against the Spring 7 accelerates and strikes at the end of its path with z. B. an approach 14 on the head 13 of the valve rod. When the current is switched off, the armature returns. By Press once or repeat this process at short intervals The anchor 'pounds' on the valve stem and any glue between Valve plate 8 and valve seat 11 is released. Depending on the program, this 'hammering' always take place when the ignition is switched on or only when normal z. B. Pulse-width-modulated control of the electromagnet using a target / actual comparison It was determined from the position feedback that the target position was not set has been.

    Fig. 4 zeigt eine weitere Ausführungsform des erfindungsgemässen Abgasrückführventils. Bei dieser Ausführungsform wird das "Knacken" des oder der Ventilteller 8 durch einen separaten Plattenmagnetanker 6, der durch eine Feder 7 vom Kopf 13 und einem Plattenmagneten 15 beabstandet ist, bewirkt.4 shows a further embodiment of the exhaust gas recirculation valve according to the invention. In this embodiment, the "cracking" of the valve plate (s) 8 is achieved a separate plate magnet armature 6 by a spring 7 from the head 13 and one Plate magnet 15 is spaced.

    Die proportionale Zustellung des Kopfes 13 und damit das proportionale Öffnen des oder der Ventilteller 8 wird durch einen Proportionalmagnetanker 16, der durch eine Feder 17 gegen den Ventilkopf 13 vorgespannt ist, bewirkt. The proportional delivery of the head 13 and thus the proportional opening of the or the valve plate 8 is by a proportional magnet armature 16, which is by a spring 17th is biased against the valve head 13 causes.

    Diese Ausführungsform bietet den Vorteil, dass der Plattenmagnet durch hohe Stellkräfte über kurze Wege das Ventil öffnet, um dann dem Proportionalmagnetanker 16 die proportionale Zustellung zu erlauben. Der Proportionanker 16 wird also nicht durch hohe schlagartige Kräfte belastet, was der Lebensdauer und der Zustellgenauigkeit zugute kommt.This embodiment offers the advantage that the plate magnet has high positioning forces the valve opens over short distances, then the proportional magnet armature 16 the proportional Allow delivery. The proportion anchor 16 is therefore not high abrupt forces are loaded, which benefits the service life and the delivery accuracy is coming.

    Weiterhin kann vorgesehen sein, dass bei einem Abgasrückführventil mit Lagerückmeldung die Stärke der Ablagerungen an Ventilteller und Ventilsitz in einem adaptiven Verfahrensschritt im Rechner von Zeit zu Zeit abgelegt wird, so dass die Zumessgenauigkeit durch eine entsprechende Berücksichtigung im Ventilhub erhalten bleibt. Bei einer weiteren Ausführungsform der Erfindung, die nicht dargestellt ist, kann der Antriebskopf 5 als bekannter pneumatischer Stellmotor ausgebildet sein, der durch eine Membran in zwei Kammern geteilt ist und ein an den Membrantellern befestigter Ansatz die Wirkung des Ankers 6 unter Speicherung der kinetischen Energie bei der Beschleunigung übernimmt und auf den Kopf 13 der Ventilstange 9 schlägt, sobald die von einem Ventil angesteuerte Arbeitskammer mit Unterdruck beaufschlagt wird.Furthermore, it can be provided that an exhaust gas recirculation valve with position feedback the thickness of the deposits on the valve plate and valve seat in an adaptive process step is stored in the computer from time to time, so that the metering accuracy through appropriate consideration in the valve lift. Another Embodiment of the invention, which is not shown, the drive head 5 as Known pneumatic actuator can be formed by a membrane in two Chambers is divided and an attachment attached to the membrane plates the effect of Anchor 6 takes over while storing the kinetic energy during acceleration and strikes the head 13 of the valve rod 9 as soon as the one controlled by a valve Working chamber is subjected to negative pressure.

    Bei atmosphärischer Belüftung der Arbeitskammer geht die Membran unter Wirkung der in der Arbeitskammer angeordneten Feder 7 in die Ausgangsstellung zurück und der Vorgang kann wiederholt werden. Die Arbeitskammer muss auf der zur Ventilstange 9 gerichteten Seite des Antriebskopfes 5 angeordnet sein und die atmosphärisch belüftete Kammer entgegengesetzt. Bei derAusführung mit pneumatischem Stellmotor kann dieser beschriebene Losbrechvorgang nach Aufbau eines entsprechenden Saugrohrunterdrucks nach den ersten Umdrehungen nach Start der Brennkraftmaschine einsetzen. Der Unterdruck kann jedoch auch durch eine mechanisch oder elektromotorisch angetriebene Vakuumpumpe erzeugt sein. Nach dem Losbrechvorgang arbeitet das Abgasrückführventil, sei es elektromagnetisch oder pneumatisch angetrieben, wie ein aus dem Stand der Technik bekanntes Ventil. Dann wird der Antriebskopf vom Rechner so angesteuert, dass der Freilauf 'X' gegen die Kraft der Feder 7 mit üblicher Stellgeschwindigkeit überfahren wird, so dass es keinen Schlag gibt und nach Erreichung der in Fig. 2 dargestellten Position, in der der Ansatz 14 in Wirkverbindung mit dem Kopf 13 der Ventilstange 9 gekommen ist, beginnt der eigentliche Verstellvorgang, d. h. das Abgasrückführventil 1 wird geöffnet.When the working chamber is ventilated atmospherically, the membrane acts under the effect of arranged in the working chamber spring 7 back to the starting position and the The process can be repeated. The working chamber must be on the valve rod 9 facing side of the drive head 5 and the atmospheric ventilated Opposite chamber. In the version with a pneumatic servomotor, this can Breakaway process described after building up a corresponding intake manifold vacuum after the first revolutions after starting the internal combustion engine. The negative pressure can also be done by a mechanically or electromotively driven vacuum pump be generated. After the breakaway process, the exhaust gas recirculation valve works, be it electromagnetically or pneumatically driven, like one from the prior art Technology known valve. Then the drive head is controlled by the computer that the freewheel 'X' run against the force of the spring 7 at the usual actuating speed is so that there is no blow and after reaching the one shown in Fig. 2 Position in which the attachment 14 is operatively connected to the head 13 of the valve rod 9 the actual adjustment process begins, d. H. the exhaust gas recirculation valve 1 will be opened.

    Claims (9)

    Abgasrückführventil mit mindestens einem mit einer Ventilstange verbundenen Ventilteller, der mit einem Ventilsitz zusammenwirkt und die Verbindung des Abgaskanals zur Ansaugleitung einer Brennkraftmaschine beherrscht und ein Betriebsparameter verarbeitender Rechner in Abhängigkeit vom Betriebszustand der Brennkraftmaschine die Öffnungsstellung des Abgasrückführventils mittels eines gegen die Kraft einer Feder wirkenden Antriebes bestimmt, dadurch gekennzeichnet, dass ein Bauteil (6) vorgesehen ist, in dem kinetische Energie speicherbar ist und das mit einem Kopf (13) am freien Ende der Ventilstange (9) in Wirkverbindung bringbar ist.Exhaust gas recirculation valve with at least one valve plate connected to a valve rod, which cooperates with a valve seat and controls the connection of the exhaust gas duct to the intake line of an internal combustion engine, and an operating parameter computer determines the open position of the exhaust gas recirculation valve depending on the operating state of the internal combustion engine by means of a drive acting against the force of a spring , characterized in that a component (6) is provided in which kinetic energy can be stored and which can be brought into operative connection with a head (13) at the free end of the valve rod (9). Abgasrückführventil nach Anspruch 1, dadurch gekennzeichnet, dass das Bauteil (6) als Anker eines Elektromagneten ausgebildet ist, der im Ruhezustand mittels einer Feder (7) zum Kopf (13) der Ventilstange (9) beabstandet ist.Exhaust gas recirculation valve according to claim 1, characterized in that the component (6) is designed as an armature of an electromagnet which is at a distance from the head (13) of the valve rod (9) by means of a spring (7). Abgasrückführventil nach Anspruch 2, dadurch gekennzeichnet, dass der Anker (6) als Proportionalanker ausgeführt ist, der im Anschlagzustand eine proportionale Zustellung des Kopfes (13) ermöglicht.Exhaust gas recirculation valve according to claim 2, characterized in that the armature (6) is designed as a proportional armature, which allows a proportional infeed of the head (13) in the stop state. Abgasrückführventil nach Anspruch 2, dadurch gekennzeichnet, dass der Anker (6) als Plattenmagnetanker ausgeführt ist, dem ein Plattenmagnet (15) zugeordnet ist, wobei ein Proportionalmagnetanker (16) gegen den Kopf (13) durch eine Feder (17) vorgespannt ist.Exhaust gas recirculation valve according to claim 2, characterized in that the armature (6) is designed as a plate magnet armature, to which a plate magnet (15) is assigned, a proportional magnet armature (16) being biased against the head (13) by a spring (17). Abgasrückführventil nach Anspruch 1, dadurch gekennzeichnet, dass das Bauteil (6) bei einem pneumatischen Antrieb (5) als an einer zwei Membrankammern trennenden Membran angeordnete Membranteller ausgebildet ist, die mittels einer Feder (7) zum Kopf (13) der Ventilstange (9) beabstandet sind. Exhaust gas recirculation valve according to Claim 1, characterized in that the component (6) in the case of a pneumatic drive (5) is designed as a diaphragm plate which is arranged on a diaphragm separating two diaphragm chambers and which is connected to the head (13) of the valve rod (9) by means of a spring (7). are spaced. Abgasrückführventil nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Position des Bauteils (6) mittels einer Lagerückmeldung (10) an den Rechner gegeben wird.Exhaust gas recirculation valve according to one of the preceding claims, characterized in that the position of the component (6) is given to the computer by means of a position feedback (10). Verfahren zum Betreiben eines Abgasrückführventils nach mindestens einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass nach Start der Brennkraftmaschine ein oder mehrere Abläufe des Aufladens des Bauteils (6) mit kinetischer Energie und des Entladens durch einen Stoss erfolgen.Method for operating an exhaust gas recirculation valve according to at least one of claims 1-6, characterized in that after starting the internal combustion engine one or more processes of charging the component (6) with kinetic energy and unloading by means of an impact take place. Verfahren zum Betreiben eines Abgasrückführventils nach Anspruch 7, dadurch gekennzeichnet, dass nach Start der Brennkraftmaschine und einem Ventilöffnungsbefehl durch einen Soll/Ist-Vergleich der Position des Proportionalmagnetankers (6, 16) bei Feststellung einer Ventilverklebung ein oder mehrere Abläufe des Aufladens des Bauteils (6) mit kinetischer Energie und des Entladens durch einen Stoss initiiert werden.Method for operating an exhaust gas recirculation valve according to claim 7, characterized in that after starting the internal combustion engine and a valve opening command by means of a target / actual comparison of the position of the proportional magnet armature (6, 16) when a valve sticking is found, one or more processes of charging the component (6 ) can be initiated with kinetic energy and discharging through an impact. Verfahren zum Betreiben eines Abgasrückführventils nach Anspruch 8, dadurch gekennzeichnet, dass bei einem Abgasrückführventil mit Lagerückmeldung die Stärke der Ablagerungen am Ventilteller (8) und Ventilsitz (11) in einem adaptiven Verfahrenschritt im Rechner abgelegt werden.Method for operating an exhaust gas recirculation valve according to claim 8, characterized in that in the case of an exhaust gas recirculation valve with position feedback, the thickness of the deposits on the valve plate (8) and valve seat (11) are stored in the computer in an adaptive method step.
    EP98120712A 1998-01-16 1998-10-31 Exhaust gas recirculation valve Expired - Lifetime EP0930428B1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    DE19801384 1998-01-16
    DE19801384 1998-01-16
    DE19848699 1998-10-13
    DE19848699A DE19848699A1 (en) 1998-01-16 1998-10-13 Exhaust gas return valve

    Publications (3)

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    EP0930428A2 true EP0930428A2 (en) 1999-07-21
    EP0930428A3 EP0930428A3 (en) 1999-12-22
    EP0930428B1 EP0930428B1 (en) 2003-09-17

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    Application Number Title Priority Date Filing Date
    EP98120712A Expired - Lifetime EP0930428B1 (en) 1998-01-16 1998-10-31 Exhaust gas recirculation valve

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    US (1) US6213446B1 (en)
    EP (1) EP0930428B1 (en)
    AT (1) ATE250182T1 (en)
    ES (1) ES2202716T3 (en)

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    LU90647B1 (en) * 2000-10-04 2002-04-05 Delphi Tech Inc Linear solenoid actuator and exhaust gas recirculation valve including such an actuator
    EP1199463A2 (en) * 2000-10-17 2002-04-24 Siebe Automotive (Deutschland) GmbH Exhaust gas recirculation valve and method of opening such a valve
    FR2827011A1 (en) * 2001-07-05 2003-01-10 Renault Control valve for I.C. engine exhaust gas recirculation circuit comprises inlet orifice connected to exhaust manifold and outlet orifices connected to cooling exchanger and air admission manifold respectively
    CN106640290A (en) * 2016-11-07 2017-05-10 山东大学 Urea box heating water valve control method and system

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    US9541040B2 (en) * 2014-09-05 2017-01-10 General Electric Company Method and systems for exhaust gas recirculation system diagnosis
    DE102020206678A1 (en) * 2020-05-28 2021-12-02 Robert Bosch Gesellschaft mit beschränkter Haftung Shut-off valve for a pressurized gas tank, pressurized gas tank
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    LU90647B1 (en) * 2000-10-04 2002-04-05 Delphi Tech Inc Linear solenoid actuator and exhaust gas recirculation valve including such an actuator
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    CN106640290A (en) * 2016-11-07 2017-05-10 山东大学 Urea box heating water valve control method and system

    Also Published As

    Publication number Publication date
    EP0930428B1 (en) 2003-09-17
    EP0930428A3 (en) 1999-12-22
    US6213446B1 (en) 2001-04-10
    ES2202716T3 (en) 2004-04-01
    ATE250182T1 (en) 2003-10-15

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