EP2610474B1 - Soupape de recyclage de gaz d'échappement à basse pression - Google Patents

Soupape de recyclage de gaz d'échappement à basse pression Download PDF

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Publication number
EP2610474B1
EP2610474B1 EP12007891.0A EP12007891A EP2610474B1 EP 2610474 B1 EP2610474 B1 EP 2610474B1 EP 12007891 A EP12007891 A EP 12007891A EP 2610474 B1 EP2610474 B1 EP 2610474B1
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EP
European Patent Office
Prior art keywords
valve
exhaust gas
gas recirculation
low
pressure exhaust
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
EP12007891.0A
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German (de)
English (en)
Other versions
EP2610474A1 (fr
Inventor
Bernd Dr.-Ing. Bareis
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.)
BorgWarner Esslingen GmbH
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BorgWarner Esslingen GmbH
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Application filed by BorgWarner Esslingen GmbH filed Critical BorgWarner Esslingen GmbH
Publication of EP2610474A1 publication Critical patent/EP2610474A1/fr
Application granted granted Critical
Publication of EP2610474B1 publication Critical patent/EP2610474B1/fr
Not-in-force 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle

Definitions

  • the invention relates to a low-pressure exhaust gas recirculation valve for initiating and controlling an exhaust gas recirculation flow and a fresh air flow having a Frisch povertyzu 1500kanal in a housing, a Abgaszu 1500kanal and connected to both discharge channel, wherein the connection of Frischluftzu 1500kanals with the discharge channel via a first valve in the housing and the Connection of the Abgaszu 1500kanals is controlled with the discharge channel via a second valve in the housing, wherein the first valve and the second valve are combined into a single valve unit having a single valve member, which cooperates with a first valve body which communicates with at least one associated first valve seat of Frischluftzu850kanals and a second valve body cooperating with at least one associated second valve seat of the exhaust gas supply passage.
  • an exhaust gas line opens laterally into a fresh air line via a valve, wherein a flow regulating device with an ejector and a throttle device for regulating the amount of exhaust gas flowing out of the exhaust gas line is provided.
  • the throttle device comprises a variable ejector with a movable ejector nozzle part with which the cross section for the exhaust gas flow to be sucked and the cross section for the fresh air supply can be adjusted.
  • the movable ejector nozzle part can be adjusted by an actuator from the outside in the axial direction.
  • a device for supplying exhaust gas to the fuel-air mixture of an internal combustion engine which consists of a combination of a throttle valve and the exhaust gas recirculation valve, wherein in the flow direction of the exhaust gas in a throttle valve stub next to a longitudinal center line an exhaust gas supply pipe opens, the mouth closed by a spool is located on the throttle itself and in its closed position closes the mouth, but it releases when the throttle opens.
  • the spool is curved in a circular shape and this curvature is adapted to the mouth of the exhaust gas supply pipe with a uniform gap-shaped distance.
  • the present invention seeks to provide a low-pressure exhaust gas recirculation valve, which allows a uniform distribution in the circumferential direction, a favorable flow guidance for the fresh air flow and the course of the recirculated exhaust gas allows low leakage with the second valve closed, so AGR- Valve, and has a compact design with a small footprint and a cost-effective design allows.
  • the single valve member has a translationally displaceable slide, which is preferably arranged coaxially to a drive unit acting thereon in the housing, which serves to actuate this single valve member.
  • a slide By means of the design according to the invention, it is possible to throttle the fresh air, instead of via flaps, by means of a slide in order to increase the rate of introduced, recirculated exhaust gas.
  • the exhaust gas recirculation channel By the coaxial arrangement of the slide to the two valve seats, which run on concentric circles, the exhaust gas recirculation channel a tight closing of the second valve, so EGR valve, and Abgaszu Switzerlandkanals and thus allows a much lower compared to flap valves leakage.
  • the valve Due to the only single valve member both for controlling the EGR rate and for throttling the fresh air sufficient for the actuation of the single valve member, a drive unit. Therefore, and because of the only single valve member, the valve is simple in construction, requires only a few items and is inexpensive. Due to the slider control is a very compact, axially short design can be achieved with a small footprint. A further advantage is that only small pressure losses are recorded and occur after the admixing no irregularities in the circumferential distribution. It creates the conditions for a flow-optimized design, with the throttling of the fresh air any pressure losses are as small as possible.
  • This combination valve according to the invention is therefore very suitable for supercharged engines, in which the EGR rate is controlled and the fresh air can be throttled in a simple manner, to increase the EGR rate, if necessary. Since the drive unit is accommodated within the inner housing body, a very compact and reliable flow-optimized design is ensured.
  • Other particular features of the invention and advantageous embodiments of the low-pressure exhaust gas return valve according to the invention will become apparent from the dependent claims, to which reference is made here to avoid repetition.
  • a low-pressure exhaust gas recirculation valve 10 is shown in the form of a combination valve, which is designed to initiate and control an exhaust gas recirculation flow and a fresh air flow and in a housing 11 has a Frisch povertyzu Georgiakanal 12, an exhaust gas supply channel 13 and a discharge channel 14 connected to both, from the Depending on the valve position either according to arrow 15 supplied fresh air (dashed arrows) and / or according to arrow 16 supplied recirculated exhaust gas (solid arrows) is discharged, which is either depending on the valve position alone fresh air Fig. 1 and 2 or alone to exhaust according to Fig. 3 or at an intermediate position of the valve is a mixture of both.
  • the connection of the Frisch povertyzu Switzerlandkanals 12 with the discharge channel 14 is controlled via a first valve 20 in the housing 11 and the connection of the Abgaszu technologicalkanals 13 with the discharge channel 14 via a second valve 30 in the housing 11.
  • the first valve 20 and the second valve 30 are inventively united into a single valve unit 40 with a single valve member 41, said single valve member 41 has at least two valve body 42, 43, which are united to form a single valve body 44.
  • the first valve body 42 cooperates with at least one associated first valve seat 21 of the Frisch povertyzu Switzerlandkanals 12.
  • the second valve body 43 cooperates with at least one associated second valve seat 31, 34 of the Abgaszu Switzerlandkanals 13.
  • the valve unit 40 has a single, acting on this control drive unit 50 in the housing 11, which is designed to actuate the single valve member 41.
  • the drive unit 50 can be designed in many ways. It consists z. B. from a schematically indicated linear drive 51, which operates in the linear direction on an axis 52.
  • the axis 52 has a fail-safe device 53 in the form of a spring 54, the axis 52 in the fail-safe case in the in Fig. 1 and 2 shown position on a stop 55 on the axis 52 shifts.
  • the single valve member 41 has a translationally adjustable slide 45, the z. B. consists of a cylindrical ring and is arranged coaxially with the drive unit 50.
  • the slider 45 is connected via individual radial webs 46 fixed to the axis 52.
  • the housing 11 has an outer jacket 17 with end-side flange 18.
  • the jacket 17 surrounds with radial distance an inner, z. B. approximately pear-shaped housing body 19 which is formed as a hollow body and the drive unit 50 includes.
  • the jacket 17 defines with the outer circumferential surface 22 of the inner housing body 19, a mixing chamber with discharge channel 14 in the form of an annular space in which experienced with appropriate valve position exhaust gas and fresh air fast, uniform and good mixing without noticeable pressure losses.
  • the housing body 19 is by means of a holding device 49, the z. B. consists of three aerodynamically designed and placed support ribs, held in the housing 11.
  • annular channel 23 is connected, which forms the Abgaszu 1500kanal 13.
  • a nozzle 24 is connected, is introduced by the recirculated exhaust gas according to arrow 16 in the annular channel 23 and Abgaszu 1500kanal 13.
  • the annular channel 23 has an annular opening 25, via which the annular channel 23 opens into the fresh air supply channel 12, depending on the valve position.
  • the annular channel 23 surrounds the Frischluftzu 1500kanal 12.
  • the slider 45 or at least a part of this is applied to an inner peripheral surface 26 of the annular channel 23, preferably below Seal there, and is guided axially displaceable along this peripheral surface 26.
  • the combined from the first valve body 42 and the second valve body 43 to a single component valve body 44 is designed as an approximately cylindrical sleeve 47, whose two end faces are formed as valve surfaces.
  • the sleeve 47 is part, e.g. fixed part, in particular one-piece part, of the slide 45, with which the sleeve 47 is connected via a conical annular part 48.
  • an axial first valve face 27 is formed, which is associated with the first valve seat 21.
  • a second valve surface 28 is formed, which is associated with the second valve seat 31.
  • the first valve seat 21 of the fresh air supply passage 12 is formed of an axial abutment surface 32 in the form of an annular groove formed on the outer peripheral surface 22 of the inner housing body 19. This axial stop surface 32 is associated with an end face of the sleeve 47 and facing, which forms the first valve face 27.
  • a second combined valve seat of the Abgaszu Semikanals 13 is formed of two axially and radially offset axial abutment surfaces 33 and 35 of the annular opening 25 of the annular channel 23.
  • One axial abutment surface 33 is assigned to the other end face of the sleeve 47 and the valve surface 28 there.
  • the other axial abutment surface 35 forms a further second valve seat 34, which is associated with a coaxial valve surface 29, the z. B. is provided on the conical ring portion 48.
  • the sleeve 47 connects to the guided part of the slider 45 and is thus preferably in one piece. In another embodiment, not shown, only the sleeve 47 forms a slide with both axial end valve surfaces 27 and 28, 29 for cooperation with the first valve seat 21 and the second valve seat 31, 34th
  • a valve position is shown in which the first valve 20 with the valve face 27 and valve seat 21 is fully open, while the second valve 30 with the valve face 28, 29 and the valve seats 31, 34 is closed, so that no exhaust gas from the Abgaszu Foodkanal 13 in can reach the discharge channel 14 and the upstream mixing chamber, but only fresh air according to the arrows 15th
  • Fig. 3 the other end position of the valve is shown, in which the first valve 20 is closed, since the valve face 27 is seated on the valve seat 21, so that the passage of fresh air from the Frischluftzu Switzerlandkanal 12 is blocked.
  • the second valve 30, however, is fully open, so that a maximum amount of recirculated exhaust gas can reach the discharge channel 14 via the upstream mixing chamber according to the solid arrow sixteenth
  • valve member 41 in the form of the single valve body 44, formed as a sleeve 47, together with the ring member 48, the valve spool of the two valves 20, 30 is held and guided by the axially integrally adjoining slide 45, wherein the valve 20th a valve seat 21 and the valve 30 has two valve seats 31 and 34, which are associated with the valve spool, the first valve surface 27 and the two second valve surfaces 28 and 29, respectively.
  • the illustrated low pressure exhaust gas recirculation valve 10 has many advantages. It has a compact design, consists of only a few individual elements and is inexpensive. A further advantage is that with regard to the streams of recirculated exhaust gas and fresh air flow optimization with very low Pressure losses is reached. It results in the mixture of fresh air and recirculated exhaust gas, a uniform circumferential distribution in the discharge channel 14 and the upstream mixing chamber, ie unequal distributions are avoided in the circumferential direction. The fresh air and the recirculated exhaust gas run for the most part in the form of an approximately parallel flow and thereby on a short axial length with good circumferential distribution.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Multiple-Way Valves (AREA)

Claims (11)

  1. Soupape de recyclage de gaz d'échappement à basse pression pour l'alimentation et la commande d'un flux de gaz d'échappement recyclé et d'un flux d'air frais, qui présente une canalisation d'alimentation d'air frais (12), une canalisation d'alimentation de gaz d'échappement (13) et une canalisation d'évacuation (14) reliée avec les deux dans un boîtier (11), où la liaison de la canalisation d'alimentation d'air frais (12) avec la canalisation d'évacuation (14) est commandée par l'intermédiaire d'une première soupape (20) dans le boîtier (11) et la liaison de la canalisation d'alimentation de gaz d'échappement (13) avec la canalisation d'évacuation (14) est commandée par l'intermédiaire d'une deuxième soupape (30) dans le boîtier (11) dans laquelle la première soupape (20) et la deuxième soupape (30) sont réunies pour former une unité de soupapes (40) unique avec un seul élément de soupape (41) qui présente un premier corps de soupape (42) qui agit conjointement avec au moins un premier siège de soupape (21) associé de la canalisation d'alimentation d'air frais (12), et un deuxième corps de soupape (43), qui agit conjointement avec au moins un deuxième siège de soupape (31, 34) associé de la canalisation d'alimentation de gaz d'échappement (13),
    dans laquelle le premier corps de soupape (42) et le deuxième corps de soupape (43) sont réunis pour former un seul corps de soupape (44) qui présente au moins une première surface de soupape (27) sur une face axiale, qui est associée à au moins un premier siège de soupape (21), et au moins une deuxième surface de soupape (28) située sur la face axiale opposée qui est associée à au moins un deuxième siège de soupape (31),
    dans laquelle l'unique corps de soupape (44) est conçu sous la forme d'un manchon (47) à peu près cylindrique aux extrémités duquel sont formées les surfaces de soupape (27, 28),
    caractérisée en ce que l'unité de soupapes (40) présente une seule unité d'entraînement (50) agissant sur elle dans le boîtier (11) pour l'actionnement du seul élément de soupape (41), et
    que le premier siège de soupape (21) de la canalisation d'alimentation d'air frais (12) est formé par une surface d'appui (32) axiale, associée à et orientée vers une surface frontale située à l'extrémité du manchon (47) sur la surface circonférentielle (22) externe d'un corps de boîtier (19) interne, qui contient l'unité d'entraînement (50) et qui s'étend à une distance radiale de l'enveloppe (17) du boîtier (11) avec sa surface circonférentielle (22) et délimite, ensemble avec l'enveloppe (17), une chambre de mélange et/ou la canalisation d'évacuation (14).
  2. Soupape de recyclage de gaz d'échappement à basse pression selon la revendication 1, caractérisée en ce que l'unité d'entraînement (50) présente un entraînement linéaire (51).
  3. Soupape de recyclage de gaz d'échappement à basse pression selon les revendications 1 ou 2, caractérisée en ce que le seul élément de soupape (41) présente un curseur (45) pouvant être réglé en translation pour l'actionnement.
  4. Soupape de recyclage de gaz d'échappement à basse pression selon la revendication 3, caractérisé en ce que le curseur (45) est disposé co-axialement par rapport à l'unité d'entraînement (50).
  5. Soupape de recyclage de gaz d'échappement à basse pression selon l'une des revendications 1 à 4, caractérisée en ce que le seul corps de soupape (44) présente deux surfaces de soupapes (28, 29) sur le coté axial à l'opposé de la première surface de soupape (27) décalées dans la direction axiale et/ou dans la direction circonférentielle, auxquelles sont associés deux sièges de soupape (31, 34) décalés dans la direction axiale et/ou dans la direction circonférentielle.
  6. Soupape de recyclage de gaz d'échappement à basse pression selon la revendication 1, caractérisée en ce que le manchon (47) constitue le curseur (45) ou constitue une partie, par exemple une partie fixe, du curseur (45), notamment, en constituant une partie d'un seul tenant.
  7. Soupape de recyclage de gaz d'échappement à basse pression selon les revendications 1 ou 6, caractérisée en ce que le corps de boîtier (19) interne est conçu sous une forme approchant d'une poire.
  8. Soupape de recyclage de gaz d'échappement à basse pression selon l'une des revendications 1 à 7, caractérisé en ce
    que l'au moins deuxième siège de soupape (31) ou deux sièges de soupape (31, 34) de la canalisation d'alimentation de gaz d'échappement (13) sont formés par des surfaces d'appui (33, 35) axiales associées et orientées vers l'autre extrémité du manchon (47) d'un orifice annulaire (25) d'une canalisation annulaire (23) de la canalisation d'alimentation de gaz d'échappement (13), qui entoure la canalisation d'alimentation d'air frais (12) et y débouche par cette orifice annulaire (25).
  9. Soupape de recyclage de gaz d'échappement à basse pression selon l'une des revendications 4 à 8,
    caractérisée en ce
    que le curseur (45) est adjacent, de préférence de manière étanche, avec une partie d'une surface circonférentielle (26) interne de la canalisation annulaire (23), et est guidé en pouvant coulisser axialement le long de cette surface circonférentielle (26).
  10. Soupape de recyclage de gaz d'échappement à basse pression selon l'une des revendications 6 à 9,
    caractérisée en ce
    que la partie guidée du curseur (45) intègre une partie annulaire (48) qui présente une surface annulaire, qui forme une deuxième surface de soupape (29) de la canalisation d'alimentation de gaz d'échappement (13) se trouvant sur la même ligne circonférentielle que le deuxième siège de soupape (34, 35) qui lui est associé.
  11. Soupape de recyclage de gaz d'échappement à basse pression selon l'une des revendications 6 à 10,
    caractérisée en ce
    que la partie guidée du curseur (45) et la partie annulaire (48) sont d'un seul tenant avec le manchon (47).
EP12007891.0A 2011-12-27 2012-11-23 Soupape de recyclage de gaz d'échappement à basse pression Not-in-force EP2610474B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011122207 2011-12-27

Publications (2)

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EP2610474A1 EP2610474A1 (fr) 2013-07-03
EP2610474B1 true EP2610474B1 (fr) 2015-09-09

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EP12007891.0A Not-in-force EP2610474B1 (fr) 2011-12-27 2012-11-23 Soupape de recyclage de gaz d'échappement à basse pression

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DE (1) DE102012024196A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10436107B2 (en) 2015-05-29 2019-10-08 Volvo Truck Corporation Exhaust gas pressure regulator for a combustion engine
DE102016213005A1 (de) * 2016-07-15 2018-01-18 Ford Global Technologies, Llc Abgasanlage mit Heizeinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2232705A1 (de) * 1972-07-04 1974-01-24 Daimler Benz Ag Vorrichtung zur zufuehrung von abgas zum brennstoff-luft-gemisch einer brennkraftmaschine
DE4429232C1 (de) * 1994-08-18 1995-09-07 Daimler Benz Ag Vorrichtung zur Abgasrückführung für eine aufgeladene Brennkraftmaschine
DE19960618B4 (de) * 1999-12-16 2005-02-03 Daimlerchrysler Ag Brennkraftmaschine mit einer Einrichtung zur Abgasrückführung und einer variablen Ejektordüse im Ansaugtrakt
US7252077B2 (en) * 2005-07-28 2007-08-07 Haldex Hydraulics Ab Sequential control valve
EP2558752B1 (fr) * 2010-04-14 2015-09-16 BorgWarner Inc. Soupape multifonction

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EP2610474A1 (fr) 2013-07-03
DE102012024196A1 (de) 2013-06-27

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