EP1199463B1 - Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve - Google Patents

Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve Download PDF

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Publication number
EP1199463B1
EP1199463B1 EP00122228A EP00122228A EP1199463B1 EP 1199463 B1 EP1199463 B1 EP 1199463B1 EP 00122228 A EP00122228 A EP 00122228A EP 00122228 A EP00122228 A EP 00122228A EP 1199463 B1 EP1199463 B1 EP 1199463B1
Authority
EP
European Patent Office
Prior art keywords
valve
waste gas
gas return
opening
valve element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00122228A
Other languages
German (de)
English (en)
Other versions
EP1199463A2 (fr
EP1199463A3 (fr
Inventor
Thiery Christoph
Klipfel Bernhard
Steinke Armin
Schliesche Dirk
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.)
Cooper Standard Automotive Deutschland GmbH
Original Assignee
Siebe Automotive Deutschland 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
Priority to EP03021198A priority Critical patent/EP1375892A1/fr
Application filed by Siebe Automotive Deutschland GmbH filed Critical Siebe Automotive Deutschland GmbH
Priority to AT00122228T priority patent/ATE260410T1/de
Priority to DE50005435T priority patent/DE50005435D1/de
Priority to ES00122228T priority patent/ES2215538T3/es
Priority to PT00122228T priority patent/PT1199463E/pt
Priority to DK00122228T priority patent/DK1199463T3/da
Priority to EP00122228A priority patent/EP1199463B1/fr
Publication of EP1199463A2 publication Critical patent/EP1199463A2/fr
Publication of EP1199463A3 publication Critical patent/EP1199463A3/fr
Application granted granted Critical
Publication of EP1199463B1 publication Critical patent/EP1199463B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/48—EGR valve position sensors

Definitions

  • the invention relates to an exhaust gas recirculation valve according to the Preamble of claim 1 and a method for opening an exhaust gas recirculation valve.
  • An exhaust gas recirculation valve according to the preamble of claim 1 is from DE 199 61 756 filed by the applicant known.
  • This known exhaust gas recirculation valve has one Rotary drive on the valve element at least at the beginning of the opening process takes place around its axis Rotary movement granted. This ensures that with greater reliability causes an opening of the valve can be, even if the valve element, for example a Valve plate, due to gluing on its seat liable.
  • Those substances in the recirculated exhaust gas are included and the liability of the valve plate to the seat cause, namely, by shear forces, as in Turning the valve plate with respect to the valve seat occur, easier to solve than by applying Normal forces, as is the case with ordinary activity by lifting the valve plate from the valve seat.
  • this Valve both in terms of preventing Gluing, as well as in terms of opening the Valve, if sticking has occurred, is in need of improvement.
  • the invention is therefore based on the object Exhaust gas recirculation valve and a method for opening an Exhaust gas recirculation valve to create the occurrence of Bonding can be prevented and / or the valve too in the event that the valve element sticks to its seat, can be opened reliably.
  • the basic idea of the invention can be seen in that an impulse work in connection with the actuation of the Exhaust gas recirculation valve is provided, so to speak for a sudden opening of an adhesive valve element worries if this is through the ordinary Opening actuation does not detach from its seat.
  • the purpose is preferably a Rotary drive element resilient at least indirectly with the Valve element connected. Should the valve element on his Adhere to the seat using a suitable mechanism causes a swing body against the rotary drive the force of the spring is twisted.
  • the flywheel becomes a suitable time from the rotary drive disengaged brought and thus triggered, and this rotates as a result the effect of the spring force and strikes to a certain extent on an element that is firmly connected to the valve element is so by a sudden rotary movement of its glue is released.
  • a swing body which with a driving element of the rotary drive in and out Intervention can be brought. Furthermore, the swing body is resilient and is at least indirectly connected to the valve element with this - after disengagement from that driving element - can be brought into engagement in such a way that the Valve element is given a (rotary) impact.
  • This Construction leads to the following mode of operation.
  • the Rotary drive always drives the via the driving element Swinging body.
  • the flywheel transmits the Rotary movement via the resilient connection, which is preferred is biased, at least indirectly on the valve element. If the valve element does not adhere to its seat, this twists and additionally, through the interaction between a contour element with a sloping flank and a start element, raised.
  • valve element sticks to its seat, it succeeds the swinging body does not, so to speak, about the resilient Connection to turn the valve plate. So it stays that way Valve element firmly and the swing body rotates as a result of the rotary drive still in operation, so that the spring tensions.
  • a suitable one Mechanism is the swing body, as mentioned, of that driving element disengageable. As a result of The swing body then turns back under spring force and then comes in with the valve element at least indirectly Intervention.
  • the Swinging body to a stop of an element that is fixed is connected to the valve element.
  • the valve element By striking the valve element becomes at least suddenly slightly, preferably against the opening movement, twisted so that it comes loose and through the continued Rotary control can be opened. If solving for this The point in time has not yet occurred Pulse mechanism active again because the driving element of the Rotary drive in turn in engagement with the swing body comes, and the process described above is repeated until the valve element has come loose.
  • the invention does not apply to an exhaust gas recirculation valve Rotary drive limited. Rather, any for example translatory drive, a push element be provided, the swing body in the case of a Rotary drive corresponds and with the drive in and disengageable is that after disengagement an impact on the valve element at least indirectly transmits, so that it is opened suddenly.
  • one or more pawls can be inserted into the Preloaded engagement position at least slightly pivotable on the driving element of the rotary drive be provided so that they drive the swing body can.
  • the can on it provided pawls with a suitable contour be in engagement with the cam contour in such a way that pivoting of the pawls at a certain point in time and thus disengaging the flywheel he follows.
  • the resilient connection between the Flywheel and the valve element or one with the Valve element firmly connected intermediate element preferably biased. This allows the Opening movement from the beginning a defined force on the Apply the valve element.
  • the impulse mechanism described is active when the opening force is less than that Adhesive force of the valve element, so that the Swing body twisted with respect to the valve element, and itself the spring tensions.
  • a flywheel For a compact design of the invention Exhaust gas recirculation valve, a flywheel is preferred, the has at least one recess in which one for the spring connection provided with the valve element spring and / or a closing spring can be accommodated.
  • the swing body preferably as a rotationally symmetrical body be trained by appropriate training of his Cross-section of at least one of the two springs mentioned will usually be designed as spiral springs, receives.
  • a freewheel device is provided, the is active in a valve closing direction.
  • the closing it should be generally noted that the closing by means of a closing spring explained in more detail below and at Assistance is performed by the engine. It is however, a so-called failsafe function provided that the valve closes as soon as the electrical path fails.
  • the Interaction between turning the valve and an element that is lifting when the valve is turned the same causes is provided such that this Interaction always takes place when opening the valve.
  • the closing direction is preferably a freewheel provided that can be designed so that it only becomes one Time becomes active at which the valve is complete closed is.
  • the freewheel device unfolds in cooperation with the Impulstechnik has special advantages in that the Impulstechnik the valve element as described in its Closing direction is twisted so that it is relative of an element that is necessary for the realization of the Lifting movement is required. For this twisting is the Freewheel device advantageous. Furthermore, how described, in the event that the impulse mechanism became active, which indicates an at least beginning bonding, that Valve element in its closed state on the Valve seat twisted, so that sticking in an early Stage can be eliminated, and the described Grinding takes place.
  • the Several stops can be provided on the element that has a leading edge and for the lifting movement of the Valve element ensures.
  • the spring tongue element When opening the are multiple spring tongues engaged with multiple stops and ensure the twist to open. If the impulse has become active, the spring tongue element to a certain extent moved away from the respective stop of the spring tongue and after a rotation by one division with the nearest stop engages so that starting from the next opening movement can take place in this position.
  • Position sensor provided.
  • Such a position sensor the stroke position of the valve plate is precisely recorded and this is reported to a controller.
  • Functional control and monitoring are carried out.
  • an exhaust gas recirculation valve is opened by a Opening movement, preferably twisting, on the Valve element is applied.
  • a Opening movement preferably twisting
  • the method step is usually suitable for the Detach valve element from its gluing to the seat and a subsequent, usual opening movement enable. If necessary, the steps mentioned performed again and / or continuously until opening is done.
  • the preferred embodiments of the The method according to the invention correspond to those Steps by the device described above performed on the exhaust gas recirculation valve according to the invention become.
  • this push element can be excluded from the drive Be engaged and at least with the valve element be indirectly engaged in such a way that on this a blow or shock is transmitted.
  • Fig. 1 is at the lower end of the invention Exhaust gas recirculation valve 10 to recognize a flange 12 with which the exhaust gas recirculation valve on an exhaust gas recirculation line is mountable.
  • the line runs through the shown flange 12 and in the case shown after a Angling downwards by about 90 °.
  • Section is provided for a valve seat for a valve is designed as a poppet valve in the case shown.
  • the Valve plate is 70 in the illustration of FIG. 1 designated. Furthermore you can see that in the middle of Fig. 1 upper end of the valve lifter 14.
  • Actuation of the valve generally takes place in such a way that a rotary drive, for example, an electric motor 16 via a plurality of gears a drive gear 18 acts, as below is described in more detail with the valve lifter 14 in such a way is connected that a rotation of the gear 18 also a Rotation of the valve lifter 14 causes.
  • the gear 18 is also a contour element 20 via a subsequently in Individual explained freewheel device connected, which in the case shown one or more on its underside identically formed, suitable contour (s), which in the shown embodiment each on a rotatable stored wheel 22, which acts as a counter element, expires.
  • a rotary operation of the valve together with the Contour element 20 thus not only causes a rotation of the Valve, so that the valve plate may differ from the Valve seat can loosen more easily, but by draining the contour on the wheel 22, also a simultaneous Lifting.
  • Fig. 1 the fully raised one State of the valve, i.e. the state of opening is shown.
  • the element 20 shown is used to close the valve turned back together with the valve plate.
  • the Freewheel device described in detail below is and a rotation of the gear 18 with respect to the Allows contour element 20 in the reverse direction is at turning back from a fully open one State not active.
  • the reason for this is that in the open position, the compressed closing spring 26 a sufficient force on the elements of the Applies freewheel device that this does not "free run” but a torque from the gear 18 on the Contour element 20 transfers in the reverse direction.
  • the exemplary embodiment shown acts over the closing spring 26 a largely hat-shaped element 28 on an intermediate element 30, which is firmly connected to the valve lifter 14.
  • the Closing is generally by means of the closing spring and preferably carried out by supporting the motor.
  • the pulse mechanism according to the invention is in the middle range Fig. 1 can be seen and becomes active when the to solve force of the valve element from its valve seat exceeds a predetermined force.
  • the rotary drive is resilient connected to the valve lifter 14, so that the valve in Normally it opens when it's not on its valve seat liable.
  • two pawls 32nd each by means of a pin 34 on the right pawl 2 can be seen rotatable about a vertical axis provided on the drive gear 18.
  • the pawls 32 are each biased outwards.
  • the left jack according to FIGS. 1 and 2 is on to recognize a recess 38 in the outer contour of the pawl 32, into the one at the bottom of a swing body 40 provided projection 42 engages.
  • the rotary actuation means that the pawl 32, although the swing body 40 is rotated, however, the intermediate element 30 of this twisting movement does not follows so that the spring 46 is tensioned.
  • the drive gear 18 rotates together with the pawls 32 thereon with respect to the Intermediate element 30, in the lower region of which one in FIG. 2 cam contour 52 to be recognized is formed. As in Fig. 2 is recognizable for the right jack, this indicates by its Inside at a rear end in the direction of rotation Projection 54 on.
  • the pawls 32 come with the lower Projections 42 of the flywheel 40 engage again, after a front slope 58 of the respective pawl this projection 42 has passed, and the one described The process is repeated. In other words, it twists again the swing body 40 with respect to the intermediate element 30 until the release occurs and this against the stop 56th of the intermediate element 30 and the valve element solves.
  • the drive can take place here in such a way that described pulse work with a selectable frequency effective so that the valve is released after a short time. This frequency is preferably on the order of some Hertz and can be tuned by a suitable masses and springs involved can be selected.
  • Position feedback sensor 72 to recognize the under Interposition of a largely disc-shaped element 74 is attached to the closing spring 26. With the help of Position feedback sensor becomes the stroke position of the valve plate 70 exactly recorded. In other words, a signal is given that is proportional to the stroke position. This signal provides a basis for monitoring the valve position, for the position control of the valve plate 70 and a general Function control.
  • FIG. 3 can also be seen how the projection 42 of the Swing body 40 from which a front part is cut away is engaged with the shoulder 56 of the intermediate element 30 is.
  • the situation shown in Fig. 2 also corresponds the beginning of the opening operation at which paragraph 44 of the Jack drives the projection 42 of the swing body 40, and the rotational movement of the flywheel via the spring 46 on the Intermediate element 30 is transmitted. If the intermediate element 30 does not follow this rotation because, as before executed, the valve element adheres to its valve seat, the swing body 40 rotates with respect to Intermediate element 30, so that the projection 42 of the Swing body 40 from shoulder 56 of intermediate element 30 disengaged.
  • the spring tongue element in the case shown 60 which is fixedly connected to the intermediate element 30 is.
  • the contour element 20 has an upper region several projections 62, between which inclined Flanks. If now in the ordinary Actuation of the valve, the intermediate element 30 to the right is rotated, there is a respective spring tongue 64 of the Spring tongue element 60 with a respective projection 62 engaged on the contour element 20 that the Contour element 20 is rotated, and by the expiration of the lower edge of the rising contour on the Wheel 22 (see FIG. 1) the valve is lifted. In in the event that, as described above, the Valve element sticks to its seat, is after the Effect of the pulse train, the intermediate element 30 together with the valve element and with the spring tongue element 60 after twisted to the left. With this movement the above slide Spring tongues 64 from at least one adjacent projection and come for the subsequent, "ordinary" Opening movement engages with this.
  • Fig. 4 it can also be seen that the swing body 40 a rotationally symmetrical, so to speak S-shaped Has cross section, in the case shown two Recesses 66 and 68 are present. In the downward direction open recess 66 is in the case shown Coil spring 46 added. In the open to the top Recess 68 takes place in the embodiment shown the hat-shaped element 28 and the closing spring 26 place. This allows a particularly compact design of the Exhaust gas recirculation valve according to the invention can be achieved.
  • valve lifter 14 is again shown in FIG. 4 including the attached valve plate 70 and between the "position feedback sensor” (not shown) 72 and the closing spring 26 provided disk-shaped Element 74 shown.

Claims (9)

  1. Valve de recirculation de gaz d'échappement (10) avec un entraínement rotatif (16), entraínant en rotation un opercule de valve au moins pendant une partie du mouvement d'ouverture,
    caractérisée en ce qu'
    est prévu un corps inertiel (40), susceptible d'être mis en et hors de prise avec un élément menant (18) de l'entraínement rotatif (16), relié élastiquement au moins indirectement à l'opercule de valve et susceptible d'être mis en prise, au moins indirectement, avec l'opercule de valve, par l'élément menant (18), après la phase de mise hors de prise, de manière qu'un choc soit transmis.
  2. Valve de recirculation de gaz d'échappement selon la revendication 1,
    caractérisée en ce qu'
    un mécanisme à cliquet (32, 36) déclenchable est prévu, relié en entraínement au corps inertiel (40).
  3. Valve de recirculation de gaz d'échappement selon la revendication 1 ou 2,
    caractérisée en ce qu'
    un élément intermédiaire (30), relié rigidement à l'opercule de valve, présente un contour en came (52), qui, lors d'une rotation de l'élément menant (18) par rapport à l'élément intermédiaire (30), provoque une mise hors de prise du corps inertiel (40).
  4. Valve de recirculation de gaz d'échappement selon au moins l'une des revendications précédentes,
    caractérisée en ce que
    la liaison (46) élastique, entre le corps inertiel (40) et l'opercule de valve, est soumise à une précontrainte.
  5. Valve de recirculation de gaz d'échappement selon au moins l'une des revendications précédentes,
    caractérisée en ce que
    le corps inertiel (40) présente au moins un évidement (66, 68), dans lequel la liaison élastique (46), entre le corps inertiel (40) et l'opercule de valve et/ou un ressort de fermeture (26), peut être logée.
  6. Valve de recirculation de gaz d'échappement selon au moins l'une des revendications précédentes,
    caractérisée en ce que
    celle-ci présente un dispositif à mouvement libre (60, 62), actif dans le sens de la fermeture de la valve.
  7. Valve de recirculation de gaz d'échappement selon la revendication 6,
    caractérisée en ce que
    le dispositif à mouvement libre présente un élément à languette élastique (60) qui, dans un sens d'ouverture, coopère avec des butées (62) d'un autre élément (20).
  8. Valve de recirculation de gaz d'échappement selon au moins l'une des revendications précédentes,
    caractérisée en ce que
    celui-ci présente un capteur de position.
  9. Procédé d'ouverture d'une valve de recirculation de gaz d'échappement, comportant les étapes suivantes :
    a) application du mouvement d'ouverture rotatif à un opercule de valve,
    b) application d'un coup ou d'un choc, au moins indirect, dans le sens de rotation d'ouverture, à l'opercule de valve, dans le cas où l'opercule de valve colle sur son siège,
    c) le cas échéant répétition, respectivement continuation, des étapes a) et b).
EP00122228A 2000-10-17 2000-10-17 Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve Expired - Lifetime EP1199463B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AT00122228T ATE260410T1 (de) 2000-10-17 2000-10-17 Abgasrückführventil und verfahren zum öffnen eines abgasrückführventils
DE50005435T DE50005435D1 (de) 2000-10-17 2000-10-17 Abgasrückführventil und Verfahren zum Öffnen eines Abgasrückführventils
ES00122228T ES2215538T3 (es) 2000-10-17 2000-10-17 Valvula de realimentacion de gases de escape y procedimiento para abrir una valvula de realimentacion de gases de escape.
PT00122228T PT1199463E (pt) 2000-10-17 2000-10-17 Valvula de recirculacao de gases de escape e processo para abrir uma valvula de recirculacao de gases de escape
EP03021198A EP1375892A1 (fr) 2000-10-17 2000-10-17 Soupape de recirculation de gaz d'échappement et procédé pour fermer une soupape de recirculation
EP00122228A EP1199463B1 (fr) 2000-10-17 2000-10-17 Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve
DK00122228T DK1199463T3 (da) 2000-10-17 2000-10-17 Tilbageföringsventil for udstödningsgas og fremgangsmåde til åbning af en sådan ventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00122228A EP1199463B1 (fr) 2000-10-17 2000-10-17 Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP03021198A Division EP1375892A1 (fr) 2000-10-17 2000-10-17 Soupape de recirculation de gaz d'échappement et procédé pour fermer une soupape de recirculation

Publications (3)

Publication Number Publication Date
EP1199463A2 EP1199463A2 (fr) 2002-04-24
EP1199463A3 EP1199463A3 (fr) 2002-10-16
EP1199463B1 true EP1199463B1 (fr) 2004-02-25

Family

ID=8170074

Family Applications (2)

Application Number Title Priority Date Filing Date
EP03021198A Withdrawn EP1375892A1 (fr) 2000-10-17 2000-10-17 Soupape de recirculation de gaz d'échappement et procédé pour fermer une soupape de recirculation
EP00122228A Expired - Lifetime EP1199463B1 (fr) 2000-10-17 2000-10-17 Valve de recirculation de gaz d'échappement et procédé pour ouvrir une telle valve

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP03021198A Withdrawn EP1375892A1 (fr) 2000-10-17 2000-10-17 Soupape de recirculation de gaz d'échappement et procédé pour fermer une soupape de recirculation

Country Status (6)

Country Link
EP (2) EP1375892A1 (fr)
AT (1) ATE260410T1 (fr)
DE (1) DE50005435D1 (fr)
DK (1) DK1199463T3 (fr)
ES (1) ES2215538T3 (fr)
PT (1) PT1199463E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1462643A1 (fr) 2003-03-25 2004-09-29 Cooper-Standard Automotive (Deutschland) GmbH Mécanisme d'ouverture d'une soupape
WO2010146121A1 (fr) * 2009-06-17 2010-12-23 Valeo Systemes De Controle Moteur Vanne comportant un dispositif de transformation de mouvement
CN101696667A (zh) * 2009-10-29 2010-04-21 奇瑞汽车股份有限公司 一种发动机egr阀
CN112065615B (zh) * 2020-09-18 2021-12-03 浙江银轮机械股份有限公司 Egr阀

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1454423A (en) * 1921-03-07 1923-05-08 Continental Engineering Corp Rotary valve for internal-combustion engines
US4346728A (en) * 1980-07-28 1982-08-31 Anchor/Darling Industries, Inc. Automated dual mode valve actuator
DE3609611C2 (de) * 1985-08-29 1994-01-27 Bosch Gmbh Robert Abgasrückführregelvorrichtung für eine Brennkraftmaschine
FR2724976B1 (fr) * 1994-09-27 1996-12-20 Sagem Allumage Unite de controle de la quantite de gaz d'echappement recyclee dans un systeme de recirculation des gaz d'echappement d'un moteur a combustion interne
JP3479353B2 (ja) * 1994-10-17 2003-12-15 株式会社ケーヒン 排気ガス再循環バルブ
US5606957A (en) * 1995-12-06 1997-03-04 Caterpillar Inc. Control system for exhaust gas recirculation
EP0930428B1 (fr) * 1998-01-16 2003-09-17 Pierburg GmbH Soupape de recirculation de gaz d'échappement
US6102016A (en) * 1999-02-12 2000-08-15 Eaton Corporation EGR system and improved actuator therefor

Also Published As

Publication number Publication date
PT1199463E (pt) 2004-06-30
EP1199463A2 (fr) 2002-04-24
EP1199463A3 (fr) 2002-10-16
DE50005435D1 (de) 2004-04-01
ES2215538T3 (es) 2004-10-16
ATE260410T1 (de) 2004-03-15
DK1199463T3 (da) 2004-06-28
EP1375892A1 (fr) 2004-01-02

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