EP2360369B1 - Dispositif de soupape pour un moteur à combustion interne - Google Patents

Dispositif de soupape pour un moteur à combustion interne Download PDF

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Publication number
EP2360369B1
EP2360369B1 EP11150951.9A EP11150951A EP2360369B1 EP 2360369 B1 EP2360369 B1 EP 2360369B1 EP 11150951 A EP11150951 A EP 11150951A EP 2360369 B1 EP2360369 B1 EP 2360369B1
Authority
EP
European Patent Office
Prior art keywords
valve
pinion
spring
rotary shaft
combustion engine
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.)
Not-in-force
Application number
EP11150951.9A
Other languages
German (de)
English (en)
Other versions
EP2360369A3 (fr
EP2360369A2 (fr
Inventor
Holger Dr. Paffrath
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP2360369A2 publication Critical patent/EP2360369A2/fr
Publication of EP2360369A3 publication Critical patent/EP2360369A3/fr
Application granted granted Critical
Publication of EP2360369B1 publication Critical patent/EP2360369B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—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 an internal combustion engine having a housing, an actuator which generates a torque, a transmission unit, a translationally movable valve, via which a flow cross-section is controlled releasable or closable, a transmission output member which is so coupled to the valve that the rotational movement of the transmission output member generates a translatory movement of the valve and a spring element which serves as a return spring.
  • valve devices are used for example as exhaust gas recirculation valves.
  • a gear unit is rotated, which has a coupling element, via which the rotational movement of the gears is converted into a translational movement of the valve stem.
  • an exhaust gas flow which is attributed from the exhaust manifold to the intake manifold for the reduction of pollutant emissions, regulated over a wide range.
  • a provision of the valve is in the closed position to ensure the safe operation of the engine can continue.
  • an exhaust gas recirculation valve in which a gear unit in the form of an eccentric coupling element is formed with a link.
  • a ball bearing which in turn connected to a valve stem of a valve.
  • a spring is arranged, which loads the coupling element such that the valve is rotated into a closing position.
  • a second spring is arranged around the valve rod and constantly loads it against the upper track of the gate.
  • an exhaust gas recirculation device in which the valve is actuated by means of a gear to be moved lever.
  • a pin is attached to the gear on which on the one hand the valve opposite end of the lever is rotatably mounted and on the other hand a spring is fixed, which loads due to their suspension in the closed position of the valve valve and the gear in the closing direction.
  • the gear at maximum open position of the valve reaches a tilting position not defined with respect to the further movement, in which the force of the spring is perpendicular to the valve rod and the lever. In this position, no spring force and thus no restoring force acts on the valve or the gear.
  • a fail-safe function of the spring is no longer given, as it is not clear in which direction the gear tilts and thus it is not clear whether the exhaust gas recirculation is only partially or completely interrupted.
  • the spring element is arranged such that on the one hand a gear or a rotary shaft of the gear unit and on the other hand, the valve are loaded in the closing direction of the valve.
  • the spring element is a helical spring which has two spring legs, of which the first spring leg biased acts on the valve and the second spring leg biased to a rotary shaft on which an upstream gear is rotatably mounted or engages the upstream gear, wherein the helical portion of the coil spring surrounds the rotary shaft. Accordingly, only a single component is needed for both functions, so both the backlash of the transmission and the fail-safe function of the valve, which is also easy to install. Such a construction facilitates assembly and provides a simple way to realize the two spring functions.
  • the second spring leg is arranged in a slot of the rotary shaft. This achieves an easily assembled arrangement of the spring.
  • the Gereteabtriebsglied a gear segment and an opposite axis of rotation on an actuating portion which engages the valve rod or a fixedly connected to the valve rod portion and is rotatable with the gear segment about the axis of rotation of the gear segment, wherein the rotational movement of the actuating portion of the translational Causing movement of the valve.
  • the conversion of the rotational movement of the drive in a translational movement of the valve is by a simplified such structure. At the same time there is access to the mounting space for the spring.
  • the gear segment on an internal toothing, which meshes with the upstream gear is biased on the rotary shaft or on which the second spring leg. This means that the upstream gear is disposed between the valve rod and the toothed portion of the lever-acting gear segment.
  • Such a valve is very compact.
  • the gear segment has an outer toothing, which meshes with an upstream gear, is biased on the rotary shaft or on which the second spring leg. This means that the complete functioning as a lever toothed segment between the upstream gear and the valve rod is arranged. When the valve moves from standstill in the closing direction, there is no change of the gear change.
  • the transmission unit is a spur gear.
  • This has a small size and is easy to install.
  • the return spring can be mounted without much effort in such a transmission and optionally replaced.
  • the spur gear on a drive gear which meshes with the larger gear of a double gear, which is rotatably mounted on the rotary shaft and whose smaller gear meshes with the transmission output member and serves as upstream gear.
  • a high gear ratio is achieved with the spur gear.
  • valve device is simple and inexpensive to manufacture and assemble.
  • valve device shown in the figures consists of a partial only in FIG. 3 illustrated, usually multi-part housing 2, in which an actuator 4 in the form of an electric motor and a driven via the electric motor gear unit 6 in the form of a spur gear and a translationally movable via the gear unit 6 valve 8 are arranged.
  • a drive gear 10 is arranged rotationally fixed. This meshes with a larger gear 12 of a double gear 14 which is rotatably mounted on a rotary shaft 16 which is mounted on a bearing 18 in the housing 2.
  • a smaller gear 20 of the double gear 14 meshes with an outer toothing 22 of a gear segment 24 of a transmission output member 26 and thus serves as an upstream gear to Gereteabretesglied 26 of the gear unit 6.
  • This Gereteabretesglied 26 is mounted on a housing 2 fixed to the axis 28, as the axis of rotation for the Transmission output member 26 is used.
  • an actuating portion 30 is formed on the opposite side to the gear segment 24 of the axis of rotation of the transmission output member 26, on the opposite side to the gear segment 24 of the axis of rotation of the transmission output member 26, an actuating portion 30 is formed.
  • the actuating portion 30 may, as in the present illustration, be a lever head which engages in a recess 32 which is formed in a valve rod 34 of the valve 8. Instead of this recess and an engagement of the actuating portion 30 is possible at other firmly connected to the valve 8 areas. These may be, for example, additional, attached to the valve rod 34 axes or the actuating portion 30 is in a simplest embodiment on the end of the valve rod 34.
  • the valve 8 is a known translationally guided lifting valve with the valve rod 34 and a valve closure member 34 fixedly connected to the valve closure member 36 which cooperates with a valve seat 38 which surrounds a flow area 40.
  • a further opening 41 is formed, engages by the present invention, a first spring leg 42 serving as a return spring spring element 44 in the form of a helical spring.
  • a helical portion 46 of the spring element 44 is wound around the rotary shaft 16, while a second spring leg 48 is disposed in a slot 50 of the rotary shaft 16.
  • the first spring leg 42 has two equally large, but in the opposite direction kinks 52, as in FIG. 3 can be seen.
  • the spring element 44 is mounted in such a way that a force is exerted on the valve 8 in the closing direction already in the position of the valve 8 closing the flow cross-section 40. Accordingly, the spring element 44 is to be twisted when inserting such that the first leg 42 presses from below against an upper wall of the opening 41 and the second leg 48 via the slot 50 exerts a torque on the rotary shaft 16 which extends in the present embodiment in the clockwise direction and thus also biases the valve 8 in the closing direction. At the same time, however, this also the teeth of the smaller gear 20 is pressed against the flanks of the teeth of the external teeth 22 of the gear segment 24. As a result, the otherwise common gear play is minimized, since no tooth flank change when stopped from the movement arises.
  • FIG. 1 In FIG. 1 are shown with arrows the corresponding acting torques and forces acting in this closed position within the valve device.
  • the actuator 4 is not energized at this time, so that the valve 8 is completely held by spring force in the position shown.
  • a torque acts through the spring element 44, which acts in a clockwise direction. This causes the teeth of the upstream gear 20 press from above against the tooth flanks of the gear segment 24, which is thus loaded in the counterclockwise direction with a torque.
  • An equal acting torque thus acts on the actuating portion 30, which thus in turn presses from below against a recess 32 defining the wall in the valve rod 34, whereby the valve rod 34 is loaded in the closing direction.
  • the spring element also loads the valve rod 34 upward, so that the valve closure member 26 is loaded by both spring parts in the direction of the valve seat 38. Equally acting forces arise in any position of the valve 8 when not actuated actuator. Thus, the valve 8 is always loaded by the spring element 44 in the direction of its valve seat.
  • FIG. 2 the effective torques when opening the valve 8 are located.
  • the torque of the actuator 4 acts in a clockwise direction, so that acts on the double gear 14, a torque in the opposite direction.
  • the torque of the gear segment now acts in a clockwise direction, so that the valve 8 is moved via the actuating portion 30 down in the opening direction.
  • An opposite but smaller force acts in the opposite direction by the leg 42 of the spring element 44.
  • An opposite torque which increases with the opening of the valve 8 by further rotation of the spring 44 also acts on the valve 8. Accordingly, a change in contact of the tooth flanks arises in each case in the transition At each standstill of the actuator creates a defined position of the gears to each other by the torque generated by the spring element 44.
  • the illustrated valve is easy to assemble and provides by means of only one spring both a provision of the valve stem and a gear play minimization, whereby the service life is increased. The resulting assembly and manufacturing costs are very low.
  • Such a valve is particularly suitable as an exhaust gas recirculation valve.
  • the gear segment can be designed as a full gear, ring gear or internally toothed gear segment.
  • various embodiments of the housing are known.
  • the arrangement of the second spring leg can also be done on the gear itself as the first spring leg can engage under an element connected to the valve rod.
  • Other possible changes are also known to the person skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (7)

  1. Dispositif de soupape pour un moteur à combustion interne avec
    un carter,
    un actionneur générant un couple,
    une unité de transmission,
    une soupape mobile en translation, par laquelle une section d'écoulement peut être libérée ou fermée d'une manière contrôlée,
    un élément de sortie de transmission couplé à la soupape de sorte que le mouvement de rotation dudit élément de sortie de transmission produit un mouvement de translation de la soupape, et
    un élément de ressort faisant office d'un ressort de rappel,
    caractérisé en ce que
    l'élément de ressort (44) est agencé de manière que, d'un côté, une roue dentée (20) ou un arbre de rotation (16) de ladite unité de transmission (6) et, de l'autre côté, la soupape (8) sont sollicités dans la direction de fermeture de la soupape (8), ledit élément de ressort (44) est un ressort hélicoïdal avec deux branches de ressort (42, 48), dont la première branche de ressort (42) est sollicitée pour engager la soupape (8) et la deuxième branche de ressort (48) est sollicitée pour engager un arbre de rotation (16) sur lequel un pignon (20) en amont est disposé solidaire en rotation, ou pour engager le pignon (20) en amont, une partie hélicoïdale (46) du ressort hélicoïdal entourant l'arbre de rotation (16).
  2. Dispositif de soupape pour un moteur à combustion interne selon la revendication 1, caractérisé en ce que la deuxième branche de ressort (48) est disposée dans une fente (50) de l'arbre de rotation (16).
  3. Dispositif de soupape pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que l'élément de sortie de transmission (26) comprend un segment de la roue dentée (24) et une section d'actionnement (30) opposée par rapport à un axe (28), la section d'actionnement engageant la tige de soupape (34) ou une partie solidaire de la tige de soupape (34) et étant apte à être tournée autour de l'axe du segment de la roue dentée (24) conjointement avec ledit segment de la roue dentée (24), la rotation de la section d'actionnement (30) causant le mouvement de translation de la soupape (8).
  4. Dispositif de soupape pour un moteur à combustion interne selon la revendication 3, caractérisé en ce que le segment de la roue dentée (24) comprend une dentelure intérieure engrenant avec la roue dentée (20) en amont, ladite deuxième branche de ressort (48) étant sollicitée sur l'arbre de rotation (16) de la roue dentée ou sur la roue dentée.
  5. Dispositif de soupape pour un moteur à combustion interne selon la revendication 3, caractérisé en ce que le segment de la roue dentée (24) comprend une dentelure extérieure (22) engrenant avec la roue dentée (20) en amont, ladite deuxième branche de ressort (48) étant sollicitée sur l'arbre de rotation (16) de la roue dentée ou sur la roue dentée.
  6. Dispositif de soupape pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que l'unité de transmission (6) est un engrenage droit.
  7. Dispositif de soupape pour un moteur à combustion interne selon la revendication 3, caractérisé en ce que l'engrenage droit comprend une roue dentée d'entrainement (10) engrenant avec la roue dentée (12) plus grande d'une roue dentée double (14) située sur l'arbre de rotation (16) de manière solidaire en rotation et dont la roue dentée (20) plus petite engrène avec l'élément de sortie de transmission (26) et fait office de roue dentée en amont.
EP11150951.9A 2010-02-24 2011-01-14 Dispositif de soupape pour un moteur à combustion interne Not-in-force EP2360369B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010009168A DE102010009168B4 (de) 2010-02-24 2010-02-24 Ventilvorrichtung für eine Verbrennungskraftmaschine

Publications (3)

Publication Number Publication Date
EP2360369A2 EP2360369A2 (fr) 2011-08-24
EP2360369A3 EP2360369A3 (fr) 2014-10-08
EP2360369B1 true EP2360369B1 (fr) 2017-06-21

Family

ID=43983370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11150951.9A Not-in-force EP2360369B1 (fr) 2010-02-24 2011-01-14 Dispositif de soupape pour un moteur à combustion interne

Country Status (2)

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EP (1) EP2360369B1 (fr)
DE (1) DE102010009168B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014201085B4 (de) * 2014-01-22 2018-12-06 Bayerische Motoren Werke Aktiengesellschaft Abgasrückführventil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6228068U (fr) * 1985-08-06 1987-02-20
US6382195B1 (en) * 2000-02-18 2002-05-07 Borgwarner Inc. Exhaust gas recirculation system for an internal combustion engine having an integrated valve position sensor
DE10125094A1 (de) * 2001-05-23 2002-11-28 Siemens Ag Abgasrückführeinrichtung
GB0419060D0 (en) 2004-08-27 2004-09-29 Delphi Tech Inc Valve actuating mechanism
DE102007054769A1 (de) * 2007-11-16 2009-05-20 Bosch Mahle Turbo Systems Gmbh & Co. Kg Stellantrieb für bidirektionales Stellglied

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102010009168A1 (de) 2011-08-25
DE102010009168B4 (de) 2012-12-27
EP2360369A3 (fr) 2014-10-08
EP2360369A2 (fr) 2011-08-24

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