EP2172638B1 - Valve device for controlling an exhaust gas flow - Google Patents

Valve device for controlling an exhaust gas flow Download PDF

Info

Publication number
EP2172638B1
EP2172638B1 EP09010362A EP09010362A EP2172638B1 EP 2172638 B1 EP2172638 B1 EP 2172638B1 EP 09010362 A EP09010362 A EP 09010362A EP 09010362 A EP09010362 A EP 09010362A EP 2172638 B1 EP2172638 B1 EP 2172638B1
Authority
EP
European Patent Office
Prior art keywords
valve device
spring
reset spring
end region
obturator
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.)
Active
Application number
EP09010362A
Other languages
German (de)
French (fr)
Other versions
EP2172638A3 (en
EP2172638A2 (en
Inventor
Jens Dipl.-Ing. von Gregory
Thomas Dipl.-Ing. Blank (FH)
Björn Dipl.-Ing. Krieger (BA)
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.)
Gustav Wahler GmbH and Co KG
Original Assignee
Gustav Wahler GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gustav Wahler GmbH and Co KG filed Critical Gustav Wahler GmbH and Co KG
Publication of EP2172638A2 publication Critical patent/EP2172638A2/en
Publication of EP2172638A3 publication Critical patent/EP2172638A3/en
Application granted granted Critical
Publication of EP2172638B1 publication Critical patent/EP2172638B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • F02M26/54—Rotary actuators, e.g. step motors

Definitions

  • the invention relates to a valve device for controlling an exhaust gas flow, with a arranged in an exhaust passage obturator which is pivotable by means of an actuator and a transmission device in the opening direction and in opposite directions in the closing direction between a closed position and an open position, wherein the obturator in case of failure of the actuator can be pivoted back in the closing direction by means of a return spring which can be acted upon in the opening direction.
  • a valve device of this type is used in connection with an exhaust gas recirculation device, by means of which a part of the exhaust gas of an internal combustion engine is taken from the exhaust line, the fresh gas line is mixed again and returned to the internal combustion engine. Due to contaminants of the exhaust pollute during operation, inter alia, the exhaust gas recirculation line and the obturator and the associated valve seat of the valve device. These impurities form an approximately liquid film on the valve seat and on the obturator. When parking the internal combustion engine there is a deposition of cooling or cooled impurities of the exhaust gas at the valve seat and the obturator.
  • a valve device with the features in the preamble of claim 1 in which a sticking of the obturator when switching off the engine or in particular in case of failure of the actuator of the obturator is prevented.
  • the obturator is pivotable in the pivoting movement in the closing direction in a rest position between the closed position and the open position with a state only small open position by means of the return spring in case of failure of the actuator.
  • Another alternative solution provides that the geometry of the spring and the actuator are chosen such that when not activated the actuator Shut-off is moved by means of the spring in the rest position.
  • the rest position is achieved by the spring.
  • a further proposal is provided, according to which the obturator is transferred by mechanical means and by means of the actuator in an open position associated detent position until the drive direction of the actuator is changed and the mechanical elements are moved from the detent position.
  • the invention has the object of providing a valve device of the type mentioned in such a way that sticking of the obturator is prevented in case of failure of the actuator in a simple manner without additional components and the valve device is simple, reliable and inexpensive.
  • the return spring is tensioned in the opening direction upon actuation of the obturator.
  • the obturator by means of the return spring in the opposite direction in the closing direction, but not in the full closed position but in a previously located rest position, pivoted back.
  • the return spring can no longer act in the direction of rotation on the obturator.
  • the housing-side stop is thus ensured that in the closing operation of the obturator this not threatened by a further acting pivotal moment of the return spring in the full closed position in which a sticking could, is panned. It is advantageous that the return spring can also serve for the return of the actuator and / or as a fail-safe spring.
  • the return spring is designed as a helical spring wound in a cylindrical shape with two spring sections which form the two end regions, for instance leg-like spring sections.
  • the one end portion forming spring portion may be bent radially outwardly approximately U-shaped.
  • the other end portion forming spring portion may be bent radially outwardly as a straight leg.
  • the return spring has approximately cylindrical shape with its superimposed turns and one end region extends at an axial distance from the other end region.
  • the transmission device has a drive shaft rotatably actuatable by the actuator, an actuating shaft connected to the obturator, and a positive coupling device between the two.
  • a coupling member is rotatably connected to the actuating shaft, which has a driver on a radially abstrebenden arm, against which the one end portion forming spring portion of the return spring is pressed in the closing direction, under some circumstances by spring force.
  • the spring section of the restoring spring forming the one end region is pressed against the housing-side stop of the valve device in the rest position by a radially extending, approximately angular section.
  • the driver is arranged at a distance above the stop and runs at least by means of the return spring in case of failure of the actuator in the closed position shut-off device with its front surface in alignment with the stop.
  • the coupling part on the area between the arms has a base part with a circular arc-shaped outer peripheral surface, by means of which the return spring can be centered.
  • the coupling part viewed in the circumferential direction between the two arms on a radial projection, which has an approximately circular arc-shaped outer peripheral surface for additional centering of the return spring.
  • the obturator can be designed as any valve member, with preference z. B. as a flap, wherein the actuating shaft is then formed as a flap shaft.
  • the drive shaft and the control shaft, in particular the flap shaft, are advantageously arranged at least substantially coaxially to each other.
  • an electric motor or a rotary drive od As an actuator, an electric motor or a rotary drive od. Like. Be provided.
  • the exhaust duct is contained in a pipe part in which the obturator is preferably pivotally mounted with its actuating shaft on both axial sides by means of bearings.
  • a housing part integral with the tube part is provided, into which the actuating shaft protrudes with a coupling part fixed thereon and in which the return spring is received in the actuating shaft in a substantially coaxial alignment.
  • a valve device with one or the other aforementioned feature is particularly advantageous, simple, reliable and inexpensive.
  • a valve device 10 for controlling an exhaust gas flow through an exhaust duct 12 contained in an indicated pipe part 11 is shown.
  • the exhaust passage 12 is connected in an exhaust gas recirculation line, not further shown, of an exhaust gas recirculation device.
  • the exhaust gas recirculation line branches off from an exhaust pipe of an internal combustion engine, passes the branched exhaust gas through the exhaust duct 12 and then flows into the fresh gas line, not shown.
  • a shut-off device 13 is arranged in the exhaust passage 12.
  • This can consist of a valve element of various kinds, for example, as shown, consist of a flap 14 which is pivotally adjustable in the exhaust passage 12. The pivot adjustment is done by means of an actuator 15 and a generally designated 16 transmission device.
  • the flap 14 is between a in Fig.
  • the valve device 10 has a schematically indicated return spring 17 which is supported on the one hand on a part of the transmission device 16 and on the other side of the housing, eg on the tube part 11 1 or a housing part 18 connected thereto.
  • the return spring 17 is acted upon actuation of the obturator 13 in the opening direction and towards the open position and is thereby tensioned.
  • the obturator 13 by means of the return spring 17 in opposite directions in the closing direction, but not to the full closed position but in a previously located rest position, politiciansschwenkbar.
  • the obturator 13 by interrupting the power supply or due to any other defect, and this when the obturator 13 is still more or less in the open position, so in this failure of the actuator 15, the obturator 13 by means of the return spring 17 in the closing direction in a rest position moves, which is located in front of the closed position and specifies a state of low open position.
  • a return movement of the obturator 13 in the direction of the closed position due to correspondingly acting moment of inertia is also possible in this provision by means of the return spring 17. Even then, however, the obturator 13 is not moved to the full closed position.
  • the return spring 17 is in the case in which the actuator 15 has its own resilient return to the provision of the actuator 15 and at the same time as a so-called. Fail-safe spring formed so that in case of failure of the actuator 15, the return of the obturator 13 in the closing direction up to the rest position and, if necessary, conditioned by moments of inertia beyond that moved close to the closed position.
  • the transmission device 16 can be loaded by the restoring spring 17, which can be supported with an end region 19 on the transmission device 16 and with the other end region 20 on the housing side of the valve device 10, z. B. on the pipe part 11 or housing part 18 ( Fig. 2 . 3 ), is supported. More details are in particular with regard to the first embodiment with reference to Fig. 2 and 3 explained.
  • the one end portion 19 of the return spring 17 is a stop 21 on the housing side associated with the valve device 10, against which this end portion 19 in the closing direction and rest position according to Fig. 2 is pressed. When the return spring 17 is at least slightly biased, the end portion 19 is resiliently pressed against the stop 21.
  • the stop 21 is an initial position for the return spring 17 in the operation of the obturator 13 in the closing direction, ie in the opposite direction to the arrow 22, in case of failure of the actuator 15 before.
  • the return spring 17 is formed as a helically wound in a cylindrical shape leg spring 23 with two approximately leg-like spring portions 24, 25 which form the two end portions 19 and 20 respectively.
  • the one spring portion 24 is bent radially outwardly approximately [-shaped, such as Fig. 2 shows.
  • This [-shaped part has an approximately horizontally extending upper portion 26 and lower portion 27, which are integrally connected via an approximately vertically intervening portion 28.
  • the other spring portion 25 is also bent radially outwardly, but as a rectilinear leg 29 (FIG. Fig. 4 and 5 ).
  • the return spring 17 with its superimposed turns 30 approximately cylindrical shape, wherein the one upper end portion 19 extends at an axial distance from the other lower end portion 20.
  • the transmission device 16 has a drive shaft 31 which can be rotationally actuated by the actuator 15, a control shaft 32 connected to the shut-off device 13, and a form-locking coupling device 33 of conventional design between the two.
  • a coupling member 34 is rotatably connected, which has two radially and diametrically directed arms 35, 36, between which a base part 37 is formed with a circular arc-shaped outer peripheral surface 38.
  • the return spring 17 can with its in Fig. 2 and 3 upper end axially abut the two arms 35 and 36 from below. It surrounds the base part 37 in the region of the outer peripheral surface 38 and is centered in this way.
  • the spring portion 24 with a radially extending, approximately angled portion on the housing-side stop 21, wherein with a corresponding bias of the return spring 17 is a resilient pressing.
  • the angular portion is formed from the lower portion 27 and at least a portion of the vertical portion 28.
  • the driver 39 is disposed on the arm 35 at a distance above the housing-side stop 21 and z. B. in by means of the return spring 17 in case of failure of the actuator 15 in the rest position moving return spring 17 with its front surface 40 may extend substantially in alignment with the stop 21.
  • the driver 39 lifts with its front surface 40 from the portion 26 of the return spring 17.
  • the return spring 17 is supported on the housing-side stop 21 and held in this rest position. This ensures that the obturator 13 is not affected by a further acting Swivel moment of the return spring 17 in the full closed position in which sticking could threaten is pivoted.
  • the drive shaft 31 and the actuating shaft 32 formed as a flap shaft are arranged at least substantially coaxially with each other.
  • a flap shaft actuating shaft 32 is preferably od on both axial sides of the obturator 13 by means of bearings in the tube part 11 od.
  • Housing 18 pivotally mounted.
  • the pipe part 11 is in Fig. 2 and 3 not particularly illustrated. It is integral with the housing part 18 shown there, in which the actuating shaft 32 protrudes with a fixed thereto coupling part 34 and in which the return spring 17 is received and centered in the adjusting shaft 32 in substantially coaxial alignment.
  • the obturator 13 After stopping the engine by means of the actuator 15 and / or the tensioned return spring 17 in its rest position in the opposite direction to the arrow 22nd pivoted until the return spring 17 abuts with its spring portion 24 on the stop 21.
  • the obturator 13 with coupling part 34 can pivot a little further in the closing direction, wherein the driver 39 lifts off from the spring section 24. Any such position shows Fig. 2 This may also be identical to a occurring during operation of the exhaust gas recirculation device position, which may correspond to a state only small open position of the valve device 10.
  • the obturator 13 can be moved in the opposite direction to the arrow 22 in the closing direction by means of the return spring acting as a fail-safe spring, wherein the return spring 17 before reaching the full closed position with the spring portion 24 abuts the stop 21 and can exert no further pivoting torque on the coupling part 34 in terms of a closing operation of the obturator 13.
  • the obturator 13 thus remains in a position between closed position and open position with a state of only a small open position and such that a sticking of the obturator 13 is excluded in the region of the valve seat.
  • the obturator 13 with the coupling member 34 in the closing direction can be slightly further pivoted, without function of the return spring 17 and without reaching the closed position.
  • the carrier 39 lifts off from the spring portion 24 of the return spring 17.
  • the coupling part 34 connected to the control shaft 32 has also in the second embodiment, as in the first embodiment, approximately U-shape with both sides radially abstrebenden arms 35 and 36 and outer peripheral surface 38, by means of which at least the axially upper part of the return spring 17 is centered.
  • a further arm in the form of a radial projection 41 is provided, which has an approximately circular arc-shaped outer peripheral surface 42.
  • the peripheral surface 42 extends on the same circle on which the peripheral surface 38 extends below the two arms 35, 36, so that a centering of the return spring 17 is achieved over a circumferential angular range of about 180 °.
  • the projection 41 the return spring 17 is centered with respect to the center of rotation and the adjusting shaft 32, that the contact and friction surfaces with which the return spring 17 comes into contact are reduced as much as possible. It is thus possible to dimension the actuator 15 smaller and / or the return spring 17 weaker, since due to reduced friction lower actuating torques or restoring moments are sufficient for trouble-free operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The device (10) has a shutoff device (13) arranged in an exhaust gas channel (12) that is pivotable between closing and opening positions by an adjusting drive (15) and a transfer device (16) in opening and closing directions. The shutoff device is pivotable during failure of drive in the closing direction by a reset spring (17) loadable in the opening direction. The shutoff device is pivotable back only during failure of the drive in a resting position between the closing and opening positions with a condition of only small opening position during pivoting movement in the closing direction.

Description

Die Erfindung bezieht sich auf eine Ventileinrichtung zur Steuerung eines Abgasstromes, mit einem in einem Abgaskanal angeordneten Absperrorgan, das mittels eines Stellantriebes und einer Übertragungseinrichtung in Öffnungsrichtung sowie gegensinnig dazu in Schließrichtung zwischen einer Schließstellung und einer Offenstellung schwenkbar ist, wobei das Absperrorgan bei Ausfall des Stellantriebes mittels einer in Öffnungsrichtung beaufschlagbaren Rückstellfeder in Schließrichtung zurückschwenkbar ist.The invention relates to a valve device for controlling an exhaust gas flow, with a arranged in an exhaust passage obturator which is pivotable by means of an actuator and a transmission device in the opening direction and in opposite directions in the closing direction between a closed position and an open position, wherein the obturator in case of failure of the actuator can be pivoted back in the closing direction by means of a return spring which can be acted upon in the opening direction.

Eine Ventileinrichtung dieser Art wird im Zusammenhang mit einer Abgasrückführeinrichtung verwendet, mittels der ein Teil des Abgases eines Verbrennungsmotors aus der Abgasleitung entnommen, der Frischgasleitung wieder beigemischt und zum Verbrennungsmotor zurückgeführt wird. Aufgrund von Verunreinigungen des Abgases verschmutzen im Betrieb unter anderem die Abgasrückführleitung sowie das Absperrorgan und der diesem zugeordnete Ventilsitz der Ventileinrichtung. Diese Verunreinigungen bilden einen annähernd flüssigen Film am Ventilsitz und am Absperrorgan. Beim Abstellen des Verbrennungsmotors erfolgt eine Ablagerung von erkaltenden oder erkalteten Verunreinigungen des Abgases am Ventilsitz und am Absperrorgan. Aufgrund dieser Schichten bildenden Verunreinigungen kann bei abgestelltem Verbrennungsmotor das Absperrorgan am Ventilsitz der Ventileinrichtung festkleben, da beim Abstellen des Verbrennungsmotors üblicherweise das Absperrorgan in seine Schließstellung bewegt wird. Ein Verkleben kann dazu führen, dass bei erneutem Betrieb des Verbrennungsmotors das Absperrorgan nicht mehr in Offenstellung bewegt werden kann. Der Betrieb der Ventileinrichtung und Abgasrückführeinrichtung ist dadurch gestört oder völlig blockiert.A valve device of this type is used in connection with an exhaust gas recirculation device, by means of which a part of the exhaust gas of an internal combustion engine is taken from the exhaust line, the fresh gas line is mixed again and returned to the internal combustion engine. Due to contaminants of the exhaust pollute during operation, inter alia, the exhaust gas recirculation line and the obturator and the associated valve seat of the valve device. These impurities form an approximately liquid film on the valve seat and on the obturator. When parking the internal combustion engine there is a deposition of cooling or cooled impurities of the exhaust gas at the valve seat and the obturator. Because of these layers forming impurities can shut off the valve body of the valve device when the engine shut off the engine, since when stopping the engine usually the obturator is moved to its closed position. Sticking may mean that the shut-off device can no longer be moved into the open position during renewed operation of the internal combustion engine. The operation of the valve device and exhaust gas recirculation device is disturbed or completely blocked.

Aus der WO 2006/096750 A1 ist eine Ventileinrichtung mit den Merkmalen im Oberbegriff des Anspruchs 1 bekannt, bei der ein Festkleben des Absperrorgans beim Abschalten des Verbrennungsmotors oder insbesondere bei Ausfall des Stellantriebes des Absperrorgans verhindert ist. Hierbei ist das Absperrorgan bei der Schwenkbewegung in Schließrichtung in eine zwischen Schließstellung und Offenstellung befindliche Ruhestellung mit einem Zustand nur geringer Offenstellung mittels der Rückstellfeder bei Ausfall des Stellantriebes schwenkbar. Dem liegt die Überlegung zugrunde, dass das Absperrorgan bei Ausfall des Stellantriebes nicht in die völlige Schließstellung zurückgeschwenkt wird, sondern auf diesem Schwenkweg vor dem Erreichen der Schließstellung in einer Ruhestellung mit nur geringer Offenstellung verbleibt, also nicht ganz schließt, und auf diese Weise ein Festkleben des Absperrorgans am Ventilsitz unterbunden ist. Dies wird z. B. durch eine schwache Rückstellfeder erreicht, deren Rückstellmoment bei der Rückstellung des Absperrorgans nur bis zu einer der Schließstellung vorgelagerten Ruhestellung reicht. Eine andere Alternative besteht darin, dass eine derart starke Rückstellfeder vorgesehen ist, die bei Abschalten des Stellantriebes das Absperrorgan weiterhin in der Offenstellung hält, solange, bis hiernach der Stellantrieb wieder eingeschaltet wird und gegen die Wirkung der Rückstellfeder das Absperrorgan in die Schließstellung bewegt. Eine andere alternative Lösung sieht vor, dass die Geometrie der Feder und des Stellantriebes derart gewählt werden, dass bei nicht eingeschaltetem Stellantrieb das Absperrorgan mittels der Feder in die Ruhestellung bewegt wird. Die Ruhestellung wird hierbei durch die Feder erreicht. Eine andere Maßnahme besteht darin, dass Absperrorgan allein durch die Steuerung der Stromversorgung des Stellantriebes für zumindest bestimmte Zeit und solange in Offenstellung oder in Ruhestellung zu halten, die ausreichend ist, um ein Erkalten der Ablagerungen am Ventilsitz und am Absperrorgan zu erreichen. Ferner ist ein weiterer Vorschlag vorgesehen, wonach das Absperrorgan mit mechanischen Mitteln und mittels des Stellantriebes in eine der Offenstellung zugeordnete Raststellung überführt wird, bis die Antriebsrichtung des Stellantriebes geändert wird und die mechanischen Elemente aus der Raststellung bewegt werden.From the WO 2006/096750 A1 a valve device with the features in the preamble of claim 1 is known, in which a sticking of the obturator when switching off the engine or in particular in case of failure of the actuator of the obturator is prevented. Here, the obturator is pivotable in the pivoting movement in the closing direction in a rest position between the closed position and the open position with a state only small open position by means of the return spring in case of failure of the actuator. This is based on the consideration that the obturator is not returned to the complete closed position in case of failure of the actuator, but remains on this pivoting before reaching the closed position in a rest position with only a small open position, so not completely closes, and in this way a sticking the obturator is prevented at the valve seat. This is z. B. achieved by a weak return spring, the restoring moment in the provision of the obturator extends only to one of the closed position upstream rest position. Another alternative is that such a strong return spring is provided, which keeps the shut-off in the open position when switching off the actuator, as long as until after the actuator is switched on again and moved against the action of the return spring the obturator in the closed position. Another alternative solution provides that the geometry of the spring and the actuator are chosen such that when not activated the actuator Shut-off is moved by means of the spring in the rest position. The rest position is achieved by the spring. Another measure is that shut-off solely by the control of the power supply of the actuator for at least certain time and as long as to keep in the open position or in the rest position, which is sufficient to achieve cooling of the deposits on the valve seat and the obturator. Furthermore, a further proposal is provided, according to which the obturator is transferred by mechanical means and by means of the actuator in an open position associated detent position until the drive direction of the actuator is changed and the mechanical elements are moved from the detent position.

Der Erfindung liegt die Aufgabe zugrunde, eine Ventileinrichtung der eingangs genannten Art so auszubilden, dass ein Festkleben des Absperrorgans bei Ausfall des Stellantriebes in einfacher Weise ohne zusätzliche Bauelemente unterbunden wird und die Ventileinrichtung einfach, betriebssicher und kostengünstig ist.The invention has the object of providing a valve device of the type mentioned in such a way that sticking of the obturator is prevented in case of failure of the actuator in a simple manner without additional components and the valve device is simple, reliable and inexpensive.

Die Aufgabe ist gemäß der Erfindung durch die Merkmale im Anspruch 1 gelöst. Hierbei wird die Rückstellfeder bei Betätigung des Absperrorgans in Offnungsrichtung gespannt. Bei Ausfall des Stellantriebes wird das Absperrorgan mittels der Rückstellfeder gegensinnig in Schließrichtung, jedoch nicht bis in die völlige Schließstellung sondern in eine davor befindliche Ruhestellung, zurück geschwenkt. Vor Erreichen der Schließstellung wird der eine Endbereich der Rückstellfeder gegen den gehäuseseitigen Anschlag angedrückt, so dass die Rückstellfeder nicht mehr in Drehrichtung auf das Absperrorgan einwirken kann. Bei einer Betätigung des Absperrorgans in Öffnungsrichtung wird dieser Endbereich vom Kupplungsteil der Übertragungseinrichtung mitgenommen und bei der weiteren Öffnungsbewegung die Rückstellfeder gespannt. Durch den gehäuseseitigen Anschlag ist somit gewährleistet, dass bei der Schließbetätigung des Absperrorganes dieses nicht durch ein weiterhin einwirkendes Schwenkmoment von der Rückstellfeder in die vollständige Schließstellung, in der ein Festkleben drohen könnte, geschwenkt wird. Vorteilhaft ist, dass die Rückstellfeder zugleich auch für die Rückstellung des Stellantriebes und/oder als Fail-Safe-Feder dienen kann.The object is achieved according to the invention by the features in claim 1. In this case, the return spring is tensioned in the opening direction upon actuation of the obturator. In case of failure of the actuator, the obturator by means of the return spring in the opposite direction in the closing direction, but not in the full closed position but in a previously located rest position, pivoted back. Before reaching the closed position of the one end portion of the return spring is pressed against the housing-side stop, so that the return spring can no longer act in the direction of rotation on the obturator. Upon actuation of the obturator in the opening direction of this end portion is taken from the coupling part of the transmission device and tensioned in the further opening movement, the return spring. By the housing-side stop is thus ensured that in the closing operation of the obturator this not threatened by a further acting pivotal moment of the return spring in the full closed position in which a sticking could, is panned. It is advantageous that the return spring can also serve for the return of the actuator and / or as a fail-safe spring.

Von Vorteil kann es sein, wenn die Rückstellfeder als schraubenförmig in Zylinderform gewundene Schenkelfeder mit zwei die beiden Endbereiche bildenden, etwa schenkelartigen Federabschnitten ausgebildet ist. Dabei kann der den einen Endbereich bildende Federabschnitt radial nach außen hin etwa U-förmig abgebogen sein. Der den anderen Endbereich bildende Federabschnitt kann radial nach außen hin als geradliniger Schenkel abgebogen sein.It may be advantageous if the return spring is designed as a helical spring wound in a cylindrical shape with two spring sections which form the two end regions, for instance leg-like spring sections. In this case, the one end portion forming spring portion may be bent radially outwardly approximately U-shaped. The other end portion forming spring portion may be bent radially outwardly as a straight leg.

Ferner kann es von Vorteil sein, wenn die Rückstellfeder mit ihren übereinander liegenden Windungen etwa Zylinderform aufweist und der eine Endbereich in axialem Abstand vom anderen Endbereich verläuft.Further, it may be advantageous if the return spring has approximately cylindrical shape with its superimposed turns and one end region extends at an axial distance from the other end region.

Vorteilhafterweise weist die Übertragungseinrichtung eine vom Stellantrieb drehbetätigbare Antriebswelle, eine mit dem Absperrorgan verbundene Stellwelle und zwischen beiden eine formschlüssige Kupplungseinrichtung auf.Advantageously, the transmission device has a drive shaft rotatably actuatable by the actuator, an actuating shaft connected to the obturator, and a positive coupling device between the two.

Von Vorteil kann es sein, wenn mit der Stellwelle ein Kupplungsteil drehfest verbunden ist, der an einem radial abstrebenden Arm einen Mitnehmer aufweist, gegen den der den einen Endbereich bildende Federabschnitt der Rückstellfeder in Schließrichtung angedrückt ist, unter Umständen unter Federkraft. Vorteilhafterweise liegt der Federabschnitt mit einem radial und geradlinig verlaufenden Abschnitt am Mitnehmer an einer in Öffnungsrichtung gerichteten Vorderfläche dieses an. Von Vorteil kann es sein, wenn der den einen Endbereich bildende Federabschnitt der Rückstellfeder mit einem sich radial erstreckenden, etwa winkelförmigen Abschnitt gegen des gehäuseseitigen Anschlag der Ventileinrichtung in Ruhestellung angedrückt ist. Weiterhin kann es vorteilhaft sein, wenn der Mitnehmer in Abstand oberhalb des Anschlages angeordnet ist und bei mittels der Rückstellfeder bei Ausfall des Stellantriebes in Ruhestellung bewegtem Absperrorgan mit seiner Vorderfläche im wesentlichen in einer Flucht mit dem Anschlag verläuft.It may be advantageous if a coupling member is rotatably connected to the actuating shaft, which has a driver on a radially abstrebenden arm, against which the one end portion forming spring portion of the return spring is pressed in the closing direction, under some circumstances by spring force. Advantageously, the spring portion with a radially and rectilinearly extending portion of the driver on a directed in the opening direction front surface of this. It can be advantageous if the spring section of the restoring spring forming the one end region is pressed against the housing-side stop of the valve device in the rest position by a radially extending, approximately angular section. Furthermore, it may be advantageous if the driver is arranged at a distance above the stop and runs at least by means of the return spring in case of failure of the actuator in the closed position shut-off device with its front surface in alignment with the stop.

Vorteilhafterweise weist der Kupplungsteil zwei radial und diametral gerichtete Arme auf, an denen die Rückstellfeder mit ihrem oberen Ende von unten her axial anliegen kann. In vorteilhafter Weise weist der Kupplungsteil auf dem Bereich zwischen den Armen einen Basisteil mit kreisbogenförmig verlaufender äußerer Umfangsfläche auf, mittels der die Rückstellfeder zentrierbar ist.Advantageously, the coupling part on two radially and diametrically directed arms on which the return spring can abut axially with its upper end from below. Advantageously, the coupling part on the area between the arms has a base part with a circular arc-shaped outer peripheral surface, by means of which the return spring can be centered.

Vorteilhafterweise weist der Kupplungsteil in Umfangsrichtung betrachtet zwischen beiden Armen einen radialen Vorsprung auf, der eine etwa kreisbogenförmig verlaufende äußere Umfangsfläche zur zusätzlichen Zentrierung der Rückstellfeder aufweist.Advantageously, the coupling part viewed in the circumferential direction between the two arms on a radial projection, which has an approximately circular arc-shaped outer peripheral surface for additional centering of the return spring.

Das Absperrorgan kann als beliebiges Ventilglied ausgebildet sein, mit Vorzug z. B. als Klappe, wobei die Stellwelle dann als Klappenwelle ausgebildet ist. Die Antriebswelle und die Stellwelle, insbesondere Klappenwelle, sind in vorteilhafter Weise zumindest im wesentlichen koaxial zueinander angeordnet.The obturator can be designed as any valve member, with preference z. B. as a flap, wherein the actuating shaft is then formed as a flap shaft. The drive shaft and the control shaft, in particular the flap shaft, are advantageously arranged at least substantially coaxially to each other.

Als Stellantrieb kann ein elektrischer Motor oder ein Drehantrieb od. dgl. vorgesehen sein.As an actuator, an electric motor or a rotary drive od. Like. Be provided.

Vorteilhafterweise ist der Abgaskanal in einem Rohrteil enthalten, in dem das Absperrorgan mit seiner Stellwelle vorzugsweise auf beiden Axialseiten mittels Lagern schwenkbar gelagert ist.Advantageously, the exhaust duct is contained in a pipe part in which the obturator is preferably pivotally mounted with its actuating shaft on both axial sides by means of bearings.

Vorteilhafterweise ist ein mit dem Rohrteil einstückiger Gehäuseteil vorgesehen, in den die Stellwelle mit daran festem Kupplungsteil hineinragt und in dem die Rückstellfeder in zur Stellwelle im wesentlichen koaxialer Ausrichtung aufgenommen ist.Advantageously, a housing part integral with the tube part is provided, into which the actuating shaft protrudes with a coupling part fixed thereon and in which the return spring is received in the actuating shaft in a substantially coaxial alignment.

Eine Ventileinrichtung mit dem einen oder anderen vorgenannten Merkmal ist besonders vorteilhaft, einfach, betriebssicher und kostengünstig.A valve device with one or the other aforementioned feature is particularly advantageous, simple, reliable and inexpensive.

Weitere Einzelheiten und Vorteile ergeben sich aus der nachfolgenden Beschreibung.Further details and advantages will become apparent from the following description.

Die Erfindung ist nachfolgend anhand von in den Zeichnungen gezeigten Ausführungsbeispielen näher erläutert. Es zeigen:

Fig. 1
eine schematische, teilweise geschnittene Seitenansicht einer Ventileinrichtung zur Steuerung eines Abgasstromes, in vereinfachter Darstellung,
Fig. 2
eine schematische, perspektivische Ansicht eines Teils einer Ventileinrichtung in Fig. 1 gemäß einem ersten Ausführungs- beispiel, wobei sich das Absperrorgan in Schließstellung und dessen Rückstellfeder in Ruhestellung befinden,
Fig. 3
eine schematische, perspektivische Ansicht eines Teils der Ventileinrichtung entsprechend derjenigen in Fig. 2, bei der sich jedoch das Absperrorgan und dessen Rückstellfeder in einer in Öffnungsrichtung verstellten Stellung befinden,
Fig. 4
eine schematische Draufsicht eines Teiles einer Ventileinrichtung gemäß einem zweiten Ausführungsbeispiel, wobei sich das Absperrorgan und dessen Rückstellfeder in einer Stellung analog Fig. 2 befinden,
Fig. 5
eine schematische Draufsicht eines Teils der Ventileinrichtung in Fig. 4, bei der sich das Absperrorgan und dessen Rückstell- feder in einer Stellung analog Fig.3 befinden.
The invention is explained in more detail with reference to embodiments shown in the drawings. Show it:
Fig. 1
1 is a schematic, partially sectioned side view of a valve device for controlling an exhaust gas flow, in a simplified representation,
Fig. 2
a schematic, perspective view of a part of a valve device in Fig. 1 according to a first embodiment, wherein the obturator in the closed position and the return spring are at rest,
Fig. 3
a schematic, perspective view of a part of the valve device corresponding to those in Fig. 2 in which, however, the obturator and its return spring are in a position adjusted in the opening direction,
Fig. 4
a schematic plan view of a portion of a valve device according to a second embodiment, wherein the obturator and its return spring in a position analog Fig. 2 are located,
Fig. 5
a schematic plan view of a part of the valve device in Fig. 4 , in which the obturator and its return spring in a position analog Figure 3 are located.

In Fig. 1 ist schematisch eine Ventileinrichtung 10 zur Steuerung eines Abgasstromes durch einen in einem angedeuteten Rohrteil 11 enthaltenen Abgaskanal 12 gezeigt. Der Abgaskanal 12 ist in eine nicht weiter gezeigte Abgasrückführleitung einer Abgasrückführeinrichtung geschaltet. Die Abgasrückführleitung zweigt von einer Abgasleitung eines Verbrennungsmotors ab, leitet das abgezweigte Abgas durch den Abgaskanal 12 und mündet danach in die nicht gezeigte Frischgasleitung ein. Im Abgaskanal 12 ist ein Absperrorgan 13 angeordnet. Dieses kann aus einem Ventilelement verschiedenster Art, z.B. wie gezeigt, aus einer Klappe 14 bestehen, die im Abgaskanal 12 schwenkverstellbar ist. Die Schwenkverstellung geschieht mittels eines Stellantriebes 15 und einer allgemein mit 16 bezeichneten Übertragungseinrichtung. Die Klappe 14 ist zwischen einer in Fig. 1 gezeigten Offenstellung und einer demgegenüber in Schließrichtung geschwenkten Schließstellung schwenkbar. Die Ventileinrichtung 10 weist eine schematisch angedeutete Rückstellfeder 17 auf, die einerseits an einem Teil der Übertragungseinrichtung 16 und andererseits gehäuseseitig, z.B. am Rohrteil 11 1 bzw. einem damit verbundenen Gehäuseteil 18, abgestützt ist. Die Rückstellfeder 17 ist bei Betätigung des Absperrorgans 13 in Öffnungsrichtung und hin zur Offenstellung beaufschlagbar und wird dabei gespannt. Bei Ausfall des Stellantriebes 15 ist das Absperrorgan 13 mittels der Rückstellfeder 17 gegensinnig in Schließrichtung, nicht jedoch bis in die völlige Schließstellung sondern in eine davor befindliche Ruhestellung, zurückschwenkbar.In Fig. 1 schematically a valve device 10 for controlling an exhaust gas flow through an exhaust duct 12 contained in an indicated pipe part 11 is shown. The exhaust passage 12 is connected in an exhaust gas recirculation line, not further shown, of an exhaust gas recirculation device. The exhaust gas recirculation line branches off from an exhaust pipe of an internal combustion engine, passes the branched exhaust gas through the exhaust duct 12 and then flows into the fresh gas line, not shown. In the exhaust passage 12, a shut-off device 13 is arranged. This can consist of a valve element of various kinds, for example, as shown, consist of a flap 14 which is pivotally adjustable in the exhaust passage 12. The pivot adjustment is done by means of an actuator 15 and a generally designated 16 transmission device. The flap 14 is between a in Fig. 1 shown open position and a contrast pivoted in the closing direction closed position. The valve device 10 has a schematically indicated return spring 17 which is supported on the one hand on a part of the transmission device 16 and on the other side of the housing, eg on the tube part 11 1 or a housing part 18 connected thereto. The return spring 17 is acted upon actuation of the obturator 13 in the opening direction and towards the open position and is thereby tensioned. In case of failure of the actuator 15, the obturator 13 by means of the return spring 17 in opposite directions in the closing direction, but not to the full closed position but in a previously located rest position, zurückschwenkbar.

Im Normalbetrieb bei eingeschaltetem und über eine nicht weiter gezeigte Steuereinrichtung angesteuertem Stellantrieb 15 wird das Absperrorgan 13 zwischen der in Fig. 1 gezeigten Offenstellung und demgegenüber in Schließrichtung geschwenkten Schließstellung entsprechend den jeweiligen Betriebsverhältnissen bewegt. Bei Abschaltung des Stellantriebes 15 wird das Absperrorgan 13 mittels des Stellantriebes 15 über Strom, der nach Abstellen noch zur Verfügung steht, aus der Offenstellung in Schließrichtung lediglich in eine zwischen Offenstellung und Schließstellung befindliche Ruhestellung mit einem Zustand nur geringer Offenstellung zurückbewegt. Diese Bewegung des Absperrorgans 13 mittels des Stellantriebes 15 wird auch als Steuergerätenachlauf bezeichnet. Fällt der Stellantrieb 15 aus irgendwelchen Gründen aus, z. B. durch Unterbrechung der Stromversorgung oder aufgrund eines sonstigen Defektes, und dies dann, wenn das Absperrorgan 13 sich noch mehr oder weniger in Offenstellung befindet, so wird bei diesem Ausfall des Stellantriebes 15 das Absperrorgan 13 mittels der Rückstellfeder 17 in Schließrichtung in eine Ruhestellung zurück bewegt, die sich vor der Schließstellung befindet und einen Zustand nur geringer Offenstellung vorgibt. Je nach Massen- und Reibungsverhältnissen ist bei dieser Rückstellung mittels der Rückstellfeder 17 auch noch eine Zurückbewegung des Absperrorgans 13 in Richtung der Schließstellung aufgrund entsprechend wirkender Schwungmomente möglich. Auch dann jedoch wird das Absperrorgan 13 nicht in die völlige Schließstellung bewegt. Die Rückstellfeder 17 ist in dem Fall, in dem der Stellantrieb 15 eine eigene federnde Rückstellung hat, zur Rückstellung des Stellantriebes 15 und zugleich als sog. Fail-Safe-Feder ausgebildet, die also bei Ausfall des Stellantriebes 15 die Zurückstellung des Absperrorgans 13 in Schließrichtung bis hin zur Ruhestellung und ggf. bedingt durch Schwungmomente darüber hinaus bis nahe in die Schließstellung bewegt.In normal operation with activated and controlled by a control device not shown further actuator 15, the shut-off valve 13 between the in Fig. 1 shown open position and in contrast pivoted in the closing direction closed position corresponding to the respective operating conditions. When switching off the actuator 15, the obturator 13 is moved back by means of the actuator 15 via power, which is still available after stopping, from the open position in the closing direction only in a position between the open position and closed position rest position with a state only small open position. This movement of the obturator 13 by means of the actuator 15 is also referred to as Steuergerätenachlauf. Falls the actuator 15 for any reason, z. B. by interrupting the power supply or due to any other defect, and this when the obturator 13 is still more or less in the open position, so in this failure of the actuator 15, the obturator 13 by means of the return spring 17 in the closing direction in a rest position moves, which is located in front of the closed position and specifies a state of low open position. Depending on the mass and friction conditions, a return movement of the obturator 13 in the direction of the closed position due to correspondingly acting moment of inertia is also possible in this provision by means of the return spring 17. Even then, however, the obturator 13 is not moved to the full closed position. The return spring 17 is in the case in which the actuator 15 has its own resilient return to the provision of the actuator 15 and at the same time as a so-called. Fail-safe spring formed so that in case of failure of the actuator 15, the return of the obturator 13 in the closing direction up to the rest position and, if necessary, conditioned by moments of inertia beyond that moved close to the closed position.

Auf diese Weise ist ein zuverlässiger Betrieb der Abgasrückführeinrichtung zwischen Schließstellung und Offenstellung des Absperrorgans 13 bei eingeschaltetem und gesteuertem Stellantrieb 15 gewährleistet. Bei Stillstand des Verbrennungsmotors oder bei Ausfall des Stellantriebes 15 ist dadurch, dass das Absperrorgan 13 zwar in Schließrichtung, aber nicht in die völlige Schließstellung sondern in eine Ruhestellung oder benachbarte Stellung mit Zustand nur geringer Offenstellung, bewegt wird, zuverlässig verhindert, dass das Absperrorgan 13 verklebt; denn bekanntlich verschmutzen bei einem Betrieb des Verbrennungsmotors und der Abgasrückführeinrichtung unter anderem der Ventilsitz und das Absperrorgan 13 aufgrund von Verunreinigungen des Abgases. Diese bilden beim Betrieb des Verbrennungsmotors einen etwa flüssigen Film am Ventilsitz und am Absperrorgan 13. Beim Abstellen des Verbrennungsmotors erfolgt dann eine Ablagerung von erkaltenden oder erkalteten Verunreinigungen des Abgases an den Wänden des Ventilsitzes und am Absperrorgan 13. Aufgrund dessen kann sonst bei abgestelltem Verbrennungsmotor des Absperrorgan 13 am Ventilsitz festkleben, sofern das Absperrorgan 13 dann in Schließrichtung in die völlige Schließstellung bewegt wird. Ein Verkleben des Absperrorgans 13 kann dazu führen, dass das Absperrorgan 13 bei einem erneuten Betrieb des Verbrennungsmotors nicht mehr mittels des Stellantriebes 15 von der Schließstellung in Öffnungsrichtung in die Offenstellung bewegt werden kann. Blockiert das Absperrorgan 13 in dieser Weise, ist keine Funktion der Ventileinrichtung 10 und Abgasrückführung möglich. Eine etwaige Säuberung des Absperrorgans 13 sowie des Ventilsitzes wäre aufwendig.In this way, a reliable operation of the exhaust gas recirculation device between the closed position and the open position of the obturator 13 is switched on and controlled actuator 15 ensures. At standstill of the internal combustion engine or failure of the actuator 15 is characterized in that the obturator 13 is indeed in the closing direction, but not in the full closed position but in a rest position or adjacent position with state only a small open position, moves reliably prevents the obturator bonded; because known to pollute during operation of the internal combustion engine and the exhaust gas recirculation device, inter alia, the valve seat and the obturator 13 due to contamination of the exhaust gas. When the internal combustion engine is shut down, then a build-up of cooling or cooled impurities of the exhaust gas takes place on the walls of the valve seat and on the shut-off device 13. Due to this, the internal combustion engine of the engine can otherwise be shut off Stick obturator 13 on the valve seat, provided that the obturator 13 is then moved in the closing direction in the full closed position. Sticking the obturator 13 may cause the obturator 13 can not be moved by the actuator 15 from the closed position in the opening direction into the open position in a renewed operation of the internal combustion engine. Blocked the obturator 13 in this way, no function of the valve device 10 and exhaust gas recirculation is possible. Any cleaning of the obturator 13 and the valve seat would be expensive.

Ein derartiges Festkleben des Absperrorgans 13 am Ventilsitz wird somit in beschriebener Weise verhindert, wobei dies einfach ist und keine besonderen zusätzlichen Bauteile benötigt, wie es sich aus der nachfolgenden Beschreibung weiterhin ergibt.Such a sticking of the obturator 13 to the valve seat is thus prevented in the manner described, this being simple and does not require any special additional components, as will continue to be apparent from the following description.

Die Übertragungseinrichtung 16 ist durch die Rückstellfeder 17 belastbar, die mit einem Endbereich 19 an der Übertragungseinrichtung 16 abstützbar ist und mit dem anderen Endbereich 20 gehäuseseitig der Ventileinrichtung 10, z. B. am Rohrteil 11 oder Gehäuseteil 18 (Fig. 2, 3), abgestützt ist. Weitere Einzelheiten sind insbesondere hinsichtlich des ersten Ausführungsbeispieles anhand von Fig. 2 und 3 erläutert. Dem einen Endbereich 19 der Rückstellfeder 17 ist ein Anschlag 21 gehäuseseitig der Ventileinrichtung 10 zugeordnet, gegen den dieser Endbereich 19 in Schließrichtung und Ruhestellung gemäß Fig. 2 angedrückt ist. Wenn die Rückstellfeder 17 zumindest geringfügig vorgespannt ist, wird deren Endbereich 19 federnd an den Anschlag 21 angedrückt. Bei Betätigung des Absperrorgans 13 in Öffnungsrichtung gemäß Pfeil 22 in Fig. 2 und 3 aus der in Fig. 2 gezeigten Stellung heraus ist der Endbereich 19 der Rückstellfeder 17 vom gehäuseseitigen Anschlag 21 abhebbar. Der Anschlag 21 gibt eine Ausgangsstellung für die Rückstellfeder 17 bei der Betätigung des Absperrorgans 13 in Schließrichtung, d.h. gegensinnig zum Pfeil 22, bei Ausfall des Stellantriebes 15 vor.The transmission device 16 can be loaded by the restoring spring 17, which can be supported with an end region 19 on the transmission device 16 and with the other end region 20 on the housing side of the valve device 10, z. B. on the pipe part 11 or housing part 18 ( Fig. 2 . 3 ), is supported. more details are in particular with regard to the first embodiment with reference to Fig. 2 and 3 explained. The one end portion 19 of the return spring 17 is a stop 21 on the housing side associated with the valve device 10, against which this end portion 19 in the closing direction and rest position according to Fig. 2 is pressed. When the return spring 17 is at least slightly biased, the end portion 19 is resiliently pressed against the stop 21. Upon actuation of the obturator 13 in the opening direction according to arrow 22 in Fig. 2 and 3 from the in Fig. 2 shown position, the end portion 19 of the return spring 17 from the housing-side stop 21 can be lifted. The stop 21 is an initial position for the return spring 17 in the operation of the obturator 13 in the closing direction, ie in the opposite direction to the arrow 22, in case of failure of the actuator 15 before.

Wie insbesondere im Detail aus Fig. 2 und 3 ersichtlich ist, ist die Rückstellfeder 17 als schraubenförmig in Zylinderform gewundene Schenkelfeder 23 mit zwei etwa schenkelartigen Federabschnitten 24, 25 ausgebildet, die die beiden Endbereiche 19 bzw. 20 bilden. Der eine Federabschnitt 24 ist radial nach außen hin etwa [-förmig abgebogen, wie Fig. 2 zeigt. Dieser [-förmige Teil hat einen etwa waagerecht verlaufenden oberen Abschnitt 26 und unteren Abschnitt 27, die über einen etwa vertikal dazwischen verlaufenden Abschnitt 28 einstückig verbunden sind. Der andere Federabschnitt 25 ist ebenfalls radial nach außen hin abgebogen, jedoch als geradliniger Schenkel 29 (Fig. 4 und 5). Insbesondere aus Fig. 2 und 3 ist ersichtlich, dass die Rückstellfeder 17 mit ihren übereinander liegenden Windungen 30 etwa Zylinderform aufweist, wobei der eine obere Endbereich 19 in axialem Abstand vom anderen unteren Endbereich 20 verläuft.As in particular in detail Fig. 2 and 3 it can be seen, the return spring 17 is formed as a helically wound in a cylindrical shape leg spring 23 with two approximately leg-like spring portions 24, 25 which form the two end portions 19 and 20 respectively. The one spring portion 24 is bent radially outwardly approximately [-shaped, such as Fig. 2 shows. This [-shaped part has an approximately horizontally extending upper portion 26 and lower portion 27, which are integrally connected via an approximately vertically intervening portion 28. The other spring portion 25 is also bent radially outwardly, but as a rectilinear leg 29 (FIG. Fig. 4 and 5 ). In particular from Fig. 2 and 3 It can be seen that the return spring 17 with its superimposed turns 30 approximately cylindrical shape, wherein the one upper end portion 19 extends at an axial distance from the other lower end portion 20.

Die Übertragungseinrichtung 16 weist eine vom Stellantrieb 15 drehbetätigbare Antriebswelle 31, eine mit dem Absperrorgan 13 verbundene Stellwelle 32 und zwischen beiden eine formschlüssige Kupplungseinrichtung 33 üblicher Bauart auf. Mit der Stellwelle 32 ist ein Kupplungsteil 34 drehfest verbunden, der zwei radial und diametral zueinander gerichtete Arme 35, 36 aufweist, zwischen denen ein Basisteil 37 mit kreisbogenförmig verlaufender äußerer Umfangsfläche 38 gebildet ist. Die Rückstellfeder 17 kann mit ihrem in Fig. 2 und 3 oberen Ende axial an den beiden Armen 35 und 36 von unten her anliegen. Sie umringt den Basisteil 37 im Bereich der äußeren Umfangsfläche 38 und ist auf diese Weise zentriert.The transmission device 16 has a drive shaft 31 which can be rotationally actuated by the actuator 15, a control shaft 32 connected to the shut-off device 13, and a form-locking coupling device 33 of conventional design between the two. With the control shaft 32, a coupling member 34 is rotatably connected, which has two radially and diametrically directed arms 35, 36, between which a base part 37 is formed with a circular arc-shaped outer peripheral surface 38. The return spring 17 can with its in Fig. 2 and 3 upper end axially abut the two arms 35 and 36 from below. It surrounds the base part 37 in the region of the outer peripheral surface 38 and is centered in this way.

An dem einen Arm 35 des Kupplungsteils 34 ist ein in Fig. 2 und 3 nach unten gerichteter Mitnehmer 39 ausgebildet, gegen den der Federabschnitt 24 der Rückstellfeder 17 in Schließrichtung, gegensinnig zum Pfeil 22, angedrückt ist, so lange bei der Schließbewegung in Schließrichtung der Federabschnitt 24 noch nicht den gehäusefesten Anschlag 21 erreicht hat, vergleiche Fig. 3. Der Mitnehmer 39 ragt ausgehend vom Arm 35 nach unten und weist eine in öffnungsrichtung gemäß Pfeil 22 gerichtete Vorderfläche 40 für den Anschlag des oberen Abschnitts 26 der Rückstellfeder 17 auf. Dieser obere Abschnitt 26 ist quer zum Mitnehmer 39 gerichtet. In der in Fig. 2 gezeigten Ruhestellung der Rückstellfeder 17 liegt der Federabschnitt 24 mit einem sich radial erstreckendem, etwa winkelförmigen Abschnitt am gehäuseseitigen Anschlag 21 an, wobei bei entsprechender Vorspannung der Rückstellfeder 17 ein federelastisches Andrücken erfolgt. Der winkelförmige Abschnitt ist gebildet aus dem unteren Abschnitt 27 und aus zumindest einem Teil des vertikalen Abschnitts 28. Man erkennt, dass der Mitnehmer 39 am Arm 35 in Abstand oberhalb des gehäuseseitigen Anschlages 21 angeordnet ist und z. B. bei mittels der Rückstellfeder 17 bei Ausfall des Stellantriebes 15 in Ruhestellung bewegter Rückstellfeder 17 mit seiner Vorderfläche 40 im wesentlichen in einer Flucht mit dem Anschlag 21 verlaufen kann. Ist das Absperrorgan 13 durch den Gasdruck im Abgaskanal 12 oder durch ein Schwungmoment bei Ausfall des Stellantriebes 15 weiter in Schließrichtung gegensinnig zum Pfeil 22 bewegt worden, so hebt der Mitnehmer 39 mit seiner Vorderfläche 40 vom Abschnitt 26 der Rückstellfeder 17 ab. Die Rückstellfeder 17 ist dabei am gehäuseseitigen Anschlag 21 abgestützt und in dieser Ruhestellung gehalten. Dadurch ist gewährleistet, dass das Absperrorgan 13 nicht durch ein weiter einwirkendes Schwenkmoment von der Rückstellfeder 17 in die vollständige Schließstellung, in der ein Festkleben drohen könnte, geschwenkt wird.On the one arm 35 of the coupling part 34 is an in Fig. 2 and 3 downwardly directed driver 39 is formed, against which the spring portion 24 of the return spring 17 in the closing direction, in the opposite direction to the arrow 22, is pressed, as long as in the closing movement in the closing direction of the spring portion 24 has not reached the housing-fixed stop 21, cf. Fig. 3 , The driver 39 projects from the arm 35 down and has a directed in the direction of arrow 22 front surface 40 for the abutment of the upper portion 26 of the return spring 17. This upper portion 26 is directed transversely to the driver 39. In the in Fig. 2 shown rest position of the return spring 17 is the spring portion 24 with a radially extending, approximately angled portion on the housing-side stop 21, wherein with a corresponding bias of the return spring 17 is a resilient pressing. The angular portion is formed from the lower portion 27 and at least a portion of the vertical portion 28. It can be seen that the driver 39 is disposed on the arm 35 at a distance above the housing-side stop 21 and z. B. in by means of the return spring 17 in case of failure of the actuator 15 in the rest position moving return spring 17 with its front surface 40 may extend substantially in alignment with the stop 21. If the obturator 13 has been moved in the opposite direction to the arrow 22 in the closing direction by the gas pressure in the exhaust duct 12 or by a moment of inertia in case of failure of the actuator 15, the driver 39 lifts with its front surface 40 from the portion 26 of the return spring 17. The return spring 17 is supported on the housing-side stop 21 and held in this rest position. This ensures that the obturator 13 is not affected by a further acting Swivel moment of the return spring 17 in the full closed position in which sticking could threaten is pivoted.

Die Antriebswelle 31 und die als Klappenwelle ausgebildete Stellwelle 32 sind zumindest im wesentlichen koaxial zueinander angeordnet.The drive shaft 31 and the actuating shaft 32 formed as a flap shaft are arranged at least substantially coaxially with each other.

Als Stellantrieb 15 kommen die verschiedensten Antriebe in Betracht, zum Beispiel ein elektrischer Motor, ein Drehmagnet oder dergleichen. Wie in Fig. 1 schematisch angedeutet ist, ist die als Klappenwelle ausgebildete Stellwelle 32 vorzugsweise auf beiden Axialseiten des Absperrorgans 13 mittels Lagern im Rohrteil 11 od. dgl. Gehäuseteil 18 schwenkbar gelagert. Der Rohrteil 11 ist in Fig. 2 und 3 nicht besonders dargestellt. Er ist einstückig mit dem dort gezeigten Gehäuseteil 18, in den die Stellwelle 32 mit daran festem Kupplungsteil 34 hineinragt und in dem die Rückstellfeder 17 in zur Stellwelle 32 im wesentlichen koaxialer Ausrichtung aufgenommen und zentriert ist.As the actuator 15, the most diverse drives come into consideration, for example, an electric motor, a rotary magnet or the like. As in Fig. 1 schematically indicated, designed as a flap shaft actuating shaft 32 is preferably od on both axial sides of the obturator 13 by means of bearings in the tube part 11 od. Like. Housing 18 pivotally mounted. The pipe part 11 is in Fig. 2 and 3 not particularly illustrated. It is integral with the housing part 18 shown there, in which the actuating shaft 32 protrudes with a fixed thereto coupling part 34 and in which the return spring 17 is received and centered in the adjusting shaft 32 in substantially coaxial alignment.

Beim Betrieb eines Kraftfahrzeuges wird auch dessen Abgasrückführeinrichtung betrieben. Die Abgasmenge, die dabei dem Frischgas beigemischt wird, wird durch Ansteuerung des Stellantriebes 15 zur Betätigung des Absperrorgans 13 über eine Steuereinrichtung in Abhängigkeit von Parametem, die die Steuereinrichtung von Elementen des Verbrennungsmotors erhält, gesteuert. Dabei wird das Absperrorgan 13 zwischen seiner Schließstellung und Offenstellung bewegt. Eine Drehbetätigung in Öffnungsrichtung gemäß Pfeil 22 bewirkt, dass über dem Kupplungsteil 34 die damit drehfeste Stellwelle 32 und der Absperrorgan 13 in Öffnungsrichtung geschwenkt werden. Vom Kupplungsteil 34 wird dabei die Rückstellfeder 17 gespannt, da deren Federabschnitt 24 vom Mitnehmer 39 des Kupplungsteils 34 in Öffnungsrichtung mitgenommen wird. Der Federabschnitt 24 hebt dabei vom gehäusefesten Anschlag 21 ab. Es ergibt sich z. B. eine Stellung gemäß Fig. 3.When operating a motor vehicle and its exhaust gas recirculation device is operated. The amount of exhaust gas, which is added to the fresh gas is controlled by driving the actuator 15 for actuating the obturator 13 via a control device in dependence on Parametem, which receives the control device of elements of the internal combustion engine. In this case, the obturator 13 is moved between its closed position and open position. A rotational actuation in the opening direction according to arrow 22 causes the rotationally fixed actuating shaft 32 and the shut-off element 13 to be pivoted in the opening direction over the coupling part 34. From the coupling part 34 while the return spring 17 is stretched, since the spring portion 24 is taken from the driver 39 of the coupling part 34 in the opening direction. The spring section 24 lifts off from the housing-fixed stop 21. It results z. B. a position according to Fig. 3 ,

Um nach einem Betrieb des Kraftfahrzeuges bei einem Stillstand des Verbrennungsmotors ein Verkleben des Absperrorgans 13 an dem zugeordneten Ventilsitz zuverlässig zu verhindern, wird das Absperrorgan 13 nach Abstellen des Verbrennungsmotors mittels des Stellantriebes 15 und/oder der gespannten Rückstellfeder 17 in deren Ruhestellung gegensinnig zum Pfeil 22 geschwenkt, bis die Rückstellfeder 17 mit ihrem Federabschnitt 24 am Anschlag 21 anschlägt. Durch etwaige Schwungmomente je nach Massen- und Reibungsverhältnissen kann ausgehend davon das Absperrorgan 13 mit Kupplungsteil 34 noch etwas weiter in Schließrichtung schwenken, wobei der Mitnehmer 39 vom Federabschnitt 24 abhebt. Eine etwaige derartige Position zeigt Fig. 2, wobei diese auch identisch mit einer bei Betrieb der Abgasrückführeinrichtung vorkommenden Stellung sein kann, die einem Zustand nur geringer Offenstellung der Ventileinrichtung 10 entsprechen kann.To reliably prevent sticking of the obturator 13 to the associated valve seat after operation of the motor vehicle at a standstill of the internal combustion engine, the obturator 13 after stopping the engine by means of the actuator 15 and / or the tensioned return spring 17 in its rest position in the opposite direction to the arrow 22nd pivoted until the return spring 17 abuts with its spring portion 24 on the stop 21. By any moment of inertia, depending on the mass and friction conditions, starting from this, the obturator 13 with coupling part 34 can pivot a little further in the closing direction, wherein the driver 39 lifts off from the spring section 24. Any such position shows Fig. 2 This may also be identical to a occurring during operation of the exhaust gas recirculation device position, which may correspond to a state only small open position of the valve device 10.

Um bei einem Ausfall des Stellantriebes 15 einen ordnungsgemäßen Betrieb des Verbrennungsmotors ohne Abgasrückführung sicherzustellen, kann dann das Absperrorgan 13 mittels der als Fail-Safe-Feder wirkenden Rückstellfeder 17 in Schließrichtung gegensinnig zum Pfeil 22 bewegt werden, wobei vor Erreichen der vollständigen Schließstellung die Rückstellfeder 17 mit dem Federabschnitt 24 am Anschlag 21 anschlägt und kein weiteres Schwenkmoment auf den Kupplungsteil 34 im Sinne einer Schließbetätigung des Absperrorgans 13 ausüben kann. Das Absperrorgan 13 verbleibt also in einer zwischen Schließstellung und Offenstellung befindlichen Stellung mit einem Zustand nur geringer Offenstellung und derart, dass ein Festkleben des Absperrorgans 13 im Bereich des Ventilsitzes ausgeschlossen ist. Aufgrund eines etwaigen in Schließrichtung dabei noch wirkenden Schwungmomentes kann das Absperrorgan 13 mit dem Kupplungsteil 34 in Schließrichtung noch geringfügig weiter geschwenkt werden, ohne Funktion der Rückstellfeder 17 und ohne dabei die Schließstellung zu erreichen. Hierbei hebt der Mitnehmer 39 vom Federabschnitt 24 der Rückstellfeder 17 ab.In order to ensure proper operation of the internal combustion engine without exhaust gas recirculation in case of failure of the actuator 15, then the obturator 13 can be moved in the opposite direction to the arrow 22 in the closing direction by means of the return spring acting as a fail-safe spring, wherein the return spring 17 before reaching the full closed position with the spring portion 24 abuts the stop 21 and can exert no further pivoting torque on the coupling part 34 in terms of a closing operation of the obturator 13. The obturator 13 thus remains in a position between closed position and open position with a state of only a small open position and such that a sticking of the obturator 13 is excluded in the region of the valve seat. Due to a possible in the closing direction while still acting moment of inertia, the obturator 13 with the coupling member 34 in the closing direction can be slightly further pivoted, without function of the return spring 17 and without reaching the closed position. Here, the carrier 39 lifts off from the spring portion 24 of the return spring 17.

Bei dem in Fig. 4 und 5 gezeigten zweiten Ausführungsbeispiel sind für die Teile, die dem ersten Ausführungsbeispiel entsprechen, gleiche Bezugszahlen verwendet, so dass dadurch zur Vermeidung von Wiederholungen auf die Beschreibung des ersten Ausführungsbeispieles Bezug genommen ist.At the in Fig. 4 and 5 shown second embodiment, the same reference numerals are used for the parts that correspond to the first embodiment, so that reference is made to avoid repetition of the description of the first embodiment.

Der mit der Stellwelle 32 verbundene Kupplungsteil 34 hat auch beim zweiten Ausführungsbeispiel, wie beim ersten Ausführungsbeispiel, etwa U-Form mit beidseitig radial abstrebenden Armen 35 und 36 und äußerer Umfangsfläche 38, mittels der zumindest der axial obere Teil der Rückstellfeder 17 zentriert ist.The coupling part 34 connected to the control shaft 32 has also in the second embodiment, as in the first embodiment, approximately U-shape with both sides radially abstrebenden arms 35 and 36 and outer peripheral surface 38, by means of which at least the axially upper part of the return spring 17 is centered.

In Umfangsrichtung gesehen ist zwischen beiden Armen 35 und 36 des Kupplungsteils 34 ist ein weiterer Arm in Form eines radialen Vorsprunges 41 vorgesehen, der eine etwa kreisbogenförmig verlaufende äußere Umfangsfläche 42 aufweist. Die Umfangsfläche 42 verläuft auf dem gleichen Kreis, auf dem auch die Umfangsfläche 38 unterhalb der beiden Arme 35, 36 verläuft, so dass eine Zentrierung der Rückstellfeder 17 über einen Umfangswinkelbereich von etwa 180° erreicht wird. Mittels des Vorsprunges 41 wird die Rückstellfeder 17 derart in Bezug auf das Drehzentrum und die Stellwelle 32 zentriert, dass die Anlage- und Reibungsflächen, mit denen die Rückstellfeder 17 in Kontakt gelangt, soweit wie möglich reduziert sind. Es ist somit möglich, den Stellantrieb 15 kleiner und/oder die Rückstellfeder 17 schwächer zu dimensionieren, da aufgrund reduzierter Reibung geringere Stellmomente bzw. Rückstellmomente ausreichend für einen störungsfreien Betrieb sind.Seen in the circumferential direction is between two arms 35 and 36 of the coupling part 34, a further arm in the form of a radial projection 41 is provided, which has an approximately circular arc-shaped outer peripheral surface 42. The peripheral surface 42 extends on the same circle on which the peripheral surface 38 extends below the two arms 35, 36, so that a centering of the return spring 17 is achieved over a circumferential angular range of about 180 °. By means of the projection 41, the return spring 17 is centered with respect to the center of rotation and the adjusting shaft 32, that the contact and friction surfaces with which the return spring 17 comes into contact are reduced as much as possible. It is thus possible to dimension the actuator 15 smaller and / or the return spring 17 weaker, since due to reduced friction lower actuating torques or restoring moments are sufficient for trouble-free operation.

Claims (11)

  1. Valve device for controlling an exhaust gas flow, having a shutoff member (13), which is arranged in an exhaust gas channel (12) and can be pivoted in an opening direction and in an opposite closing direction, between a closed position and an open position, by an actuating drive (15) and a transmission device (16), wherein, if the actuating drive (15) fails, the shutoff member (13) can be pivoted back in the closing direction only into a rest position located between the closed position and the open position, said rest position involving a state in which said shutoff member is in an only slightly open position, by means of a reset spring (17) that can be loaded in the opening direction, and wherein the reset spring (17) can be supported by an end region (19) on a coupling part (34) of the transmission device (16) and can be supported by the other end region (20) on the housing side of the valve device (10) and is tensioned during the actuation of the shutoff member (13) in the opening direction, characterized in that
    one end region (19) of the reset spring (17) is assigned a stop (21) on the housing side of the valve device (10), against which this end region (19) is pressed in the closing direction and the rest position and from which this end region (19) can be raised when the shutoff member (13) is actuated in the opening direction by means of the transmission device (16), and in that the stop (21) defines an initial position for the reset spring (17) during the actuation of the shutoff member (13) in the closing direction when the actuating drive (15) fails.
  2. Valve device according to Claim 1,
    characterized in that
    the reset spring (17) is designed to reset the actuating drive (15) and/or is designed as a fail-safe spring.
  3. Valve device according to either of Claims 1 or 2, characterized in that
    the reset spring (17) is designed as a leg spring wound helically in a cylindrical shape and having two approximately leg-like spring sections (24, 25), which form the two end regions (19, 20), and preferably in that the spring section (24) forming one end region (19) is bent radially outwards approximately in a U shape, and preferably in that the spring section (25) forming the other end region (20) is bent radially outwards as a rectilinear leg (29), wherein the reset spring (17) with its windings (30) situated one on top of the other has approximately a cylinder shape and one end region (19) extends at an axial distance from the other end region (20).
  4. Valve device according to one of Claims 1 to 3, characterized in that
    the transmission device (16) has a drive shaft (31), which can be actuated in rotation by the actuating drive (15), an actuating shaft (32) connected to the shutoff member (13) and, between the two, a positive coupling device (33), and preferably in that the coupling part (34) is connected to the actuating shaft (32) for conjoint
    rotation therewith, which coupling part has, on a radially projecting arm (35), a driver (39), against which the spring section (24) of the reset spring (17) which forms one end region (19) is pressed in the closing direction.
  5. Valve device according to Claim 4,
    characterized in that
    the spring section (24) rests against the driver (39) at a front face (40) oriented in the opening direction by means of a radially and rectilinearly extending section (26).
  6. Valve device according to one of Claims 3 to 5, characterized in that,
    in the rest position, the spring section (24) of the reset spring (17) which forms one end region (19) is pressed against the stop (21) on the housing side of the valve device (10) with a radially extending, approximately angular section (26, 27).
  7. Valve device according to either of Claims 4 or 5, characterized in that
    the driver (39) is arranged at a distance above the stop (21) and extends with its front face (40) substantially in alignment with the stop (21) when the shutoff member (13) is moved into the rest position by means of the reset spring (17) when the actuating drive (15) fails.
  8. Valve device according to one of Claims 1 to 7, characterized in that
    the coupling part (34) has two radially and diametrically oriented arms (35, 36), against which the reset spring (17) can rest axially with its upper end, and preferably in that, in the region between the arms (35, 36), the coupling part (34) has a base part (37) with a circular-arc-shaped outer circumferential surface (38), by means of which the reset spring (17) can be centred.
  9. Valve device according to one of Claims 1 to 8, characterized in that,
    between the two arms (35, 36) as seen in the circumferential direction, the coupling part (34) has a radial projection (41), which has an approximately circular-arc-shaped outer circumferential surface (42) for additional centring of the reset spring (17).
  10. Valve device according to one of Claims 1 to 9, characterized in that
    the exhaust duct (12) is contained in a tubular part (11), in which the shutoff member (13) is pivotably mounted by means of its actuating shaft (32), preferably on both axial sides, by means of bearings.
  11. Valve device according to Claim 10, characterized in that
    a housing part (18) which is integral with the tubular part (11) is provided, into which housing part the actuating shaft (32) with the coupling part (34) fixed thereon projects and in which the reset spring (17) is accommodated in substantially coaxial alignment with respect to the actuating shaft (32).
EP09010362A 2008-10-04 2009-08-12 Valve device for controlling an exhaust gas flow Active EP2172638B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008050466.1A DE102008050466B4 (en) 2008-10-04 2008-10-04 Valve device for controlling an exhaust gas flow

Publications (3)

Publication Number Publication Date
EP2172638A2 EP2172638A2 (en) 2010-04-07
EP2172638A3 EP2172638A3 (en) 2011-02-09
EP2172638B1 true EP2172638B1 (en) 2011-11-02

Family

ID=41570042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09010362A Active EP2172638B1 (en) 2008-10-04 2009-08-12 Valve device for controlling an exhaust gas flow

Country Status (3)

Country Link
EP (1) EP2172638B1 (en)
AT (1) ATE531924T1 (en)
DE (1) DE102008050466B4 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049673B1 (en) * 2016-03-30 2018-11-23 Faurecia Systemes D'echappement EXHAUST LINE VALVE AND CORRESPONDING MOUNTING METHOD
DE102017209458A1 (en) * 2017-06-05 2018-12-06 Siemens Schweiz Ag Actuator with a return spring acting independently of the actuating operation on a control connection
DE102018123400A1 (en) * 2018-09-24 2020-03-26 Eberspächer Exhaust Technology GmbH & Co. KG Exhaust flap

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19825583B4 (en) * 1998-06-09 2014-04-03 Gustav Wahler Gmbh U. Co Kg Exhaust gas recirculation valve for internal combustion engines and method for operating such
JP2004162665A (en) * 2002-11-15 2004-06-10 Denso Corp Exhaust gas recirculation device
DE102004043662B3 (en) * 2004-09-08 2006-02-16 Benteler Automobiltechnik Gmbh Exhaust gas return valve for internal combustion engine has exhaust channel in form of a first tubular piece carried by U-shaped holder, and second one linked to it
EP1869308B1 (en) * 2005-03-08 2014-08-06 BorgWarner, Inc. Egr valve having rest position
DE102006054041B3 (en) * 2006-11-16 2008-05-08 Pierburg Gmbh Regulating device for an internal combustion engine

Also Published As

Publication number Publication date
EP2172638A3 (en) 2011-02-09
DE102008050466A1 (en) 2010-04-08
DE102008050466B4 (en) 2021-01-28
EP2172638A2 (en) 2010-04-07
ATE531924T1 (en) 2011-11-15

Similar Documents

Publication Publication Date Title
DE69810850T2 (en) Exhaust gas recirculation valve
EP2084439B1 (en) Rotary slide valve, in particular for a coolant circuit, which has a plurality of branches, of an internal combustion engine; electromechanical assembly
EP2245276B1 (en) Hydraulic control valve having integrated check valve
DE102007019064B3 (en) Rotary slide valve, particularly for coolant circuit, has device that is provided to couple cross section adjustment members to one another, which generates rotational angle difference between cross section adjustment members
WO2007051332A2 (en) Actuator with a reduction gear provided for an actuating element for regulate a gas or fluid flow
DE102006054041B3 (en) Regulating device for an internal combustion engine
DE1920277A1 (en) Valve adjusting device
DE102006031028A1 (en) Valve e.g. exhaust gas reconducting valve, operating device for internal combustion engine, has drive motor and eccentric drive for lifting operation of actuator with valve unit, and driven drive unit that is in connection with rotary drive
EP1389272B1 (en) Device for preventing an exhaust gas recirculation valve from sticking after switching off an internal combustion engine
DE102012022238A1 (en) Thermostatic valve for an internal combustion engine
EP2172638B1 (en) Valve device for controlling an exhaust gas flow
EP1526271B1 (en) Exhaust gas recirculation valve
EP2067977B1 (en) Double valve for a device for exhaust gas recirculation
EP2187032A2 (en) Valve device for control of a flue gas stream fed and led back by a combustion engine
DE4028702A1 (en) ACTUATOR
DE112014000111B4 (en) valve assembly
DE60129624T2 (en) Engine-operated flap
WO2002037008A1 (en) Rotating regulating device
DE10044898A1 (en) Valve
EP1245820A1 (en) Exhaust gas recirculation valve
EP2233729A1 (en) Flap device for a combustion engine
DE4242634C2 (en) Device for the continuous variation of valve lift and timing of the intake and exhaust valves of a reciprocating piston internal combustion engine
EP2478204B1 (en) Control unit and coupling device
DE102004003664B3 (en) Final control device, e.g. for controlling flaps in internal combustion engines, has worm wheel as segment with at least one sprung stop with stop surface that rests against corresponding stop surface on worm or worm shaft in end position
DE2532302C2 (en) Drive device for remote-controlled pipe shut-off valves

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA RS

17P Request for examination filed

Effective date: 20110407

RIC1 Information provided on ipc code assigned before grant

Ipc: F02M 25/07 20060101AFI20110519BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502009001775

Country of ref document: DE

Effective date: 20120112

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20111102

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120302

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120203

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120302

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120202

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20120803

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502009001775

Country of ref document: DE

Effective date: 20120803

BERE Be: lapsed

Owner name: GUSTAV WAHLER G.M.B.H. U. CO.KG

Effective date: 20120831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120831

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: WITTE, WELLER & PARTNER, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130831

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120812

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090812

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140821

Year of fee payment: 6

Ref country code: GB

Payment date: 20140820

Year of fee payment: 6

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

Effective date: 20140717

Ref country code: DE

Ref legal event code: R081

Ref document number: 502009001775

Country of ref document: DE

Owner name: BORGWARNER ESSLINGEN GMBH, DE

Free format text: FORMER OWNER: GUSTAV WAHLER GMBH U. CO. KG, 73730 ESSLINGEN, DE

Effective date: 20141124

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

Effective date: 20130422

Ref country code: DE

Ref legal event code: R082

Ref document number: 502009001775

Country of ref document: DE

Representative=s name: TWELMEIER MOMMER & PARTNER PATENT- UND RECHTSA, DE

Effective date: 20141124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111102

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 531924

Country of ref document: AT

Kind code of ref document: T

Effective date: 20140812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140812

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20150812

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150812

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150831

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502009001775

Country of ref document: DE

Owner name: BORGWARNER STUTTGART GMBH, DE

Free format text: FORMER OWNER: BORGWARNER ESSLINGEN GMBH, 73730 ESSLINGEN, DE

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20231017

Year of fee payment: 15