EP3012445B1 - Dispositif de régulation pour un moteur a combustion interne - Google Patents

Dispositif de régulation pour un moteur a combustion interne Download PDF

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Publication number
EP3012445B1
EP3012445B1 EP15182294.7A EP15182294A EP3012445B1 EP 3012445 B1 EP3012445 B1 EP 3012445B1 EP 15182294 A EP15182294 A EP 15182294A EP 3012445 B1 EP3012445 B1 EP 3012445B1
Authority
EP
European Patent Office
Prior art keywords
flap
exhaust gas
housing part
valve seat
gas recirculation
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
EP15182294.7A
Other languages
German (de)
English (en)
Other versions
EP3012445A1 (fr
Inventor
Wolfgang Kohnen
Ulrich Dr. Fassbender
Ruth Lindemann
Andrea Uhler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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Filing date
Publication date
Application filed by Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP3012445A1 publication Critical patent/EP3012445A1/fr
Application granted granted Critical
Publication of EP3012445B1 publication Critical patent/EP3012445B1/fr
Active 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
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1005—Details of the flap
    • F02D9/1025—Details of the flap the rotation axis of the flap being off-set from the flap center axis
    • F02D9/103—Details of the flap the rotation axis of the flap being off-set from the flap center axis the rotation axis being located at an edge
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake 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
    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits

Definitions

  • the invention relates to a control device for an internal combustion engine having an intake passage, an exhaust gas recirculation passage, which opens into the intake passage, a housing in which the intake passage and at least one mouth of the exhaust gas recirculation passage are formed, serving as a rotation axis, the upstream in the housing with respect to the air flow is arranged at the mouth of the exhaust gas recirculation passage and outside the flow cross section and perpendicular to the center axes of the intake passage and the exhaust gas recirculation passage, a control body eccentrically fixed to the shaft and via which the control body is rotatable in the intake passage, a first valve seat on which the control body rests in a first end position, in which the control body closes the intake passage and a second valve seat against which the control body rests in a second end position in which the control body closes the exhaust gas recirculation passage.
  • Control devices are used in internal combustion engines to regulate exhaust or air quantities that are to be removed or supplied to combustion. Combinations of these control valves, in which two valve bodies are actuated via a common actuating device, are known.
  • combinations of an exhaust gas recirculation valve with a throttle valve have been disclosed.
  • the exhaust gas recirculation channel opens immediately downstream of serving as a throttle valve in the air intake passage.
  • increase in the exhaust gas recirculation rate is then with opening the Exhaust gas recirculation valve to the same extent the throttle valve closed, which has an increase in the pressure gradient in the exhaust gas recirculation channel result, whereby the proportion of exhaust gas compared to the intake air quantity is increased.
  • Such an arrangement is for example in the DE 27 03 687 A1 disclosed.
  • an inlet system of an internal combustion engine in which in each of the inlet channels a flap is arranged, which regulates on the one hand the opening cross section of the air inlet channel and on the other hand in opposite directions the opening cross section of an opening into the air inlet duct exhaust gas recirculation channel.
  • this eccentrically mounted flap lies with its opposite end to the shaft in an oblique position on the opposite wall. A complete closure of the air duct is not possible, since no circumferential contact of the flap can be reached at the valve seat.
  • a tubular-shaped housing part is formed obliquely at the downstream end, wherein the downstream end serves as a first valve seat through which a plane is clamped, which to the central axis of the intake passage an angle of 70 ° to 80 ° includes, the rotation angle range, in which only a small change in volume flow of the exhaust gas flow and the air flow is observed, can be reduced to about 20% of the control range. This allows a faster control of the recirculated exhaust gas amount and resulting pollutant emissions can be reduced.
  • a plane spanned by the second valve seat is arranged parallel to the central axis of the intake passage and encloses an angle of 70 ° to 80 ° to the plane spanned by the first valve seat.
  • the rotational angle range to be traveled is also about 70 ° to 80 °. This means that the setting range is reduced in comparison to known designs, but without the rotational angle ranges, in which there is already good controllability, reduced in size. In these areas, the slope of the control curve remains essentially unchanged.
  • control body has a first flap cooperating with the first valve seat and a second flap cooperating with the second valve seat, the first flap being eccentrically secured to the shaft and the second flap being attached to the first flap Due to the design with two flaps, the arrangement of the valve seats to each other can be done with significantly inaccurate tolerances. Furthermore, the control body can be completely unscrewed from the flow-through area of the air intake duct.
  • the second flap is arranged on a perpendicular to the two flaps extending holding axis which is fixedly connected to the first flap, wherein the second flap is axially loaded by a spring which surrounds the holding axis against a stop and the opening in the second flap for receiving the holding axis has a slightly larger diameter than the holding axis, in which Section where the second flap is located.
  • the second flap extends parallel to the first flap.
  • the first valve seat is formed by an axial end of a first housing part of the housing, which is inserted into a second housing part of the housing, on which the mouth of the exhaust gas recirculation passage is formed, wherein the first housing part is connected via a flange to the second housing part.
  • a valve seat which must be generated mechanically in the interior of the housing.
  • complicated molds for producing a full-acting valve seat The housing can thus be inexpensively manufactured and assembled with little effort.
  • the first housing part has a smaller circumference than the second housing part and the control body immersed in its the exhaust gas recirculation passage closing second end position in a recess in the second housing part, so that the flow cross-section of the first housing part is fully opened.
  • FIG. 1 shows a side view of a control device according to the invention with a control body in a first end position in a sectional view.
  • FIG. 2 shows a side view of the control device according to the invention FIG. 1 with a rule body in a central position in a sectional representation.
  • FIG. 3 shows a side view of the control device according to the invention FIG. 1 with a control body in a second end position in a sectional view.
  • FIG. 4 shows a characteristic of the resulting control curve of the control device according to the invention.
  • the control device consists of a housing 10 which defines an intake passage 12 and in which an opening 14 of an exhaust gas recirculation passage 16 is formed.
  • the intake passage 12 extends substantially in a straight line, while the exhaust gas recirculation passage 16 opens perpendicular to the intake passage 12 in this.
  • the housing 10 consists of a first substantially tubular housing part 18, whose downstream end is formed obliquely and an angle ⁇ of about 75 ° to a central axis 20 of the intake passage 12 includes.
  • This first housing part 18 is arranged in the interior of a second housing part 22, or is inserted into the second housing part 22 until a flange 24, via which the first housing part 18 is fastened by means of screws 26 on the second housing part 22.
  • the second housing part 22 has an opening 28 which is arranged in the flow direction at a short distance behind the oblique end of the first housing part 18 and which serves as a receptacle for a third housing part 30, which forms the mouth 14 of the exhaust gas recirculation passage 16, the central axis 34 perpendicular is arranged to the central axis 20 of the intake passage 12.
  • a shaft 36 is rotatably mounted, which can be actuated via a non-visible actuator.
  • the axis of rotation 38 of this shaft 36 is perpendicular to the central axes 20, 34 and is located between the shaft 36 to the downstream mouth 14 of the exhaust gas recirculation passage 16 and the axial end of the first housing part 18 and immediately downstream of the first housing part 18.
  • the flow cross-section of the first housing part 18 is smaller than that of the second housing part 22 of the intake passage 12, wherein the first housing part 18 is fastened to the second housing part 22 in such a way that a recess 40 formed in the region of the mouth of the exhaust gas recirculation channel 16 is arranged outside the throughflow cross section, in which the shaft 36 is arranged penetrating the second housing part 22.
  • a control body 42 is attached, which consists of a first flap 44 and a fortified via a holding axis 46 on the first flap 44 second flap 48.
  • the first flap 44 extends straight from the shaft 36 and dominates the flow area of the intake passage 12.
  • the first flap 44 cooperates with the axial end of the first housing part 18, which serves as a first valve seat 50 on which the flap 44 in the Intake passage 12 occluding state, as in FIG. 1 is shown, is applied.
  • a bore 52 is formed in the central region, in which the holding axis 46 is fixed. This extends to the first housing part 18 opposite side perpendicular to the first flap 44.
  • the holding axis 46 has a plurality of axially successive sections of different diameter, of which the first portion 54, the bore 52 penetrates and is formed in the rear region to produce a rivet and the second, larger portion 56 abuts flat against the flap 44.
  • a third axial portion 58 has a smaller diameter than the second portion 56, followed by a fourth portion 60 again of reduced diameter.
  • the second flap 48 is arranged, which has a central opening 62 through which the support shaft 46 penetrates, wherein the diameter of this opening 62 is slightly larger than the diameter of the fourth portion 60, whereby the second flap 48 on the Holding axle 46 light can be tilted.
  • a spring 64 also surrounds the fourth section 60 and presses the flap 48 against a spherical shoulder serving as a stop 65 between the third section 58 and the fourth section 60.
  • the abutment for this spring 64 is a disk 66 which is mounted on a fifth section 68 the retaining axis 46 is arranged, where it is fixed by forming, a disc 66 penetrating following portion 70 of the support shaft 46.
  • This attachment of the second flap 48 results in that upon rotation of the shaft 36 in a second end position, as in FIG. 3 is shown, in which the second flap 48 rests on the second valve seat 72 serving as the mouth 14 of the exhaust gas recirculation passage 16, a complete tight closure of the exhaust gas recirculation passage 16 takes place, since the flap 48 adjust its position by the possible tilting movement to the position of the second valve seat 72 can, even if this is not completely parallel to the central axis 20 of the intake passage 12 is formed.
  • the described control device is thus suitable for the very exact metering of an exhaust gas mass flow into an air mass flow and for the exact control of the air mass flow with only one actuator.
  • the production of this control device is inexpensive and easy to install.
  • valve seats in the range between 70 ° and 80 ° can be selected to achieve appropriate results.
  • various modifications with respect to the assembly and the formation of the housing parts and the two flaps are conceivable. It should also be clear that various characteristics can be achieved by appropriate shaping of the valve body and the surrounding channel walls.

Landscapes

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

Claims (7)

  1. Dispositif de régulation pour un moteur à combustion interne, avec
    un canal d'aspiration (12),
    un canal de recirculation des gaz d'échappement (16) s'ouvrant dans le canal d'aspiration (12),
    un carter (10) dans lequel ledit canal d'aspiration (12) et au moins une ouverture (14) dudit canal de recirculation des gaz d'échappement (16) sont formés,
    un arbre (36) servant comme axe rotatif (38), ledit arbre étant disposé, par rapport au courant d'air, dans ledit carter (10) en amont de l'ouverture (14) dudit canal de recirculation des gaz d'échappement (16) de la section d'écoulement et hors de la section d'écoulement, et qui est disposé perpendiculairement aux axes centraux (20, 34) du canal d'aspiration (12) et du canal de recirculation des gaz d'échappement (16),
    un corps de régulation (42), qui est fixé excentriquement sur l'arbre (36) et par lequel arbre le corps de régulation (42) peut être tourné dans le canal d'aspiration (12),
    un premier siège de soupape (50) sur lequel le corps de régulation (42) reste dans une première position finale, dans laquelle le corps de régulation (42) ferme le canal d'aspiration (12),
    un premier siège de soupape (50) sur lequel le corps de régulation (42) reste dans une deuxième position finale, dans laquelle le corps de régulation (42) ferme le canal de recirculation des gaz d'échappement (16),
    caractérisé en ce qu'une partie de carter (18) tubulaire est chanfreinée à l'extrémité avale, l'extrémité avale servant comme premier siège de soupape (50), qui définit un plan (74), formant un angle de 70° à 80° avec l'axe central du canal d'admission (12).
  2. Dispositif de régulation pour un moteur à combustion interne selon la revendication 1, caractérisé en ce qu'un plan (76) défini par le deuxième siège de soupape (72) est disposé parallèlement à l'axe central (20) du canal d'aspiration (12) et forme un angle de 70° à 80° avec le plan (74) défini par le premier siège de soupape (50).
  3. Dispositif de régulation pour un moteur à combustion interne selon l'une des revendications 1 et 2, caractérisé en ce que le corps de régulation (42) comprend un premier clapet (44) coopérant avec le premier siège de soupape (50) et comprend un deuxième clapet (48) coopérant avec le deuxième siège de soupape (72), ledit premier clapet (44) étant fixé excentriquement sur l'arbre (36) et le deuxième clapet (48) est monté sur le premier clapet (44).
  4. Dispositif de régulation pour un moteur à combustion interne selon la revendication 3, caractérisé en ce que le deuxième clapet (48) est disposé sur un axe de retenue (46) fixement relié avec ledit premier clapet (44) et s'étendant perpendiculairement aux deux clapets (44, 48), ledit deuxième clapet (48) étant sollicité axialement contre une butée (65) par un ressort (64) qui entoure ledit axe de retenue (46), et l'ouverture (62) dans le deuxième clapet (48) pour recevoir ledit axe de retenue (46) a un diamètre minimalement supérieur à celui dudit axe de retenue (46) dans la section (60) ou le deuxième clapet (48) est disposé.
  5. Dispositif de régulation pour un moteur à combustion interne selon l'une des revendications 3 ou 4, caractérisé en ce que le deuxième clapet (48) s'étend parallèle au premier clapet (44).
  6. Dispositif de régulation pour un moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit premier siège de soupape (50) est formé par une extrémité axiale d'une première partie de carter (18) du carter (10) insérée dans une deuxième partie de carter (22) du carter (10) dans laquelle l'ouverture (14) du canal de recirculation des gaz d'échappement (16), la première partie de carter (18) étant connectée avec la deuxième partie de carter (22) par une bride (24).
  7. Dispositif de régulation pour un moteur à combustion interne selon la revendication 6, caractérisé en ce que la première partie de carter (18) a une circonférence inférieure à celle de la deuxième partie du carter (22) et le corps de régulation (42), dans la deuxième position finale fermant ledit canal de recirculation des gaz d'échappement (16), plonge dans une cavité (40) dans la deuxième partie de carter (22), de sorte que la section d'écoulement de la première partie de carter (18) soit complètement ouverte.
EP15182294.7A 2014-10-15 2015-08-25 Dispositif de régulation pour un moteur a combustion interne Active EP3012445B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014114968.8A DE102014114968B4 (de) 2014-10-15 2014-10-15 Regelvorrichtung für eine Verbrennungskraftmaschine

Publications (2)

Publication Number Publication Date
EP3012445A1 EP3012445A1 (fr) 2016-04-27
EP3012445B1 true EP3012445B1 (fr) 2018-03-21

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EP15182294.7A Active EP3012445B1 (fr) 2014-10-15 2015-08-25 Dispositif de régulation pour un moteur a combustion interne

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DE (1) DE102014114968B4 (fr)

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JP6019352B1 (ja) * 2015-09-11 2016-11-02 有限会社オート・アドバンス・アイザワ 排気圧力制御弁
DE102015119432B3 (de) * 2015-11-11 2017-02-02 Ford-Werke Gmbh Einlasssystem für eine Verbrennungskraftmaschine
GB2544731B (en) 2015-11-19 2019-02-20 Ford Global Tech Llc An exhaust gas recirculation apparatus
DE102016108389B4 (de) * 2016-05-06 2018-03-15 Pierburg Gmbh Regelvorrichtung
DE102016108388B4 (de) * 2016-05-06 2021-01-21 Pierburg Gmbh Regelvorrichtung
US10934945B2 (en) 2016-08-24 2021-03-02 Ford Global Technologies, Llc Internal combustion engine with compressor, exhaust-gas recirculation arrangement and pivotable flap
DE102016215872A1 (de) 2016-08-24 2018-03-01 Ford Global Technologies, Llc Aufgeladene Brennkraftmaschine mit Verdichter, Abgasrückführung und Ventileinheit
DE102016118463A1 (de) 2016-09-29 2018-03-29 Pierburg Gmbh Kanalsystem für eine Verbrennungskraftmaschine
DE102016121705B4 (de) 2016-11-14 2018-06-14 Pierburg Gmbh Regelvorrichtung für eine Verbrennungskraftmaschine
DE102017109062A1 (de) 2017-04-27 2018-10-31 Ford-Werke Gmbh Regelvorrichtung für eine Verbrennungskraftmaschine
DE102017109066A1 (de) 2017-04-27 2018-10-31 Ford-Werke Gmbh Regelvorrichtung für eine Verbrennungskraftmaschine
DE102018205385B4 (de) 2018-04-10 2020-06-10 Ford Global Technologies, Llc Ventilklappenanordnung für ein Drei-Wege-Abgasrückführungs-Ventil

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AT3762U1 (de) * 1998-10-22 2000-07-25 Avl List Gmbh Brennkraftmaschine mit einem einlasssystem
DE10133942A1 (de) * 2000-07-14 2002-01-24 Schatz Thermo Engineering Verfahren zur Steuerung der Brennluftzufuhr eines Verbrennungsmotors und Zusatzventilanordnung zur Durchführung des Verfahrens
DE102004044894A1 (de) * 2004-09-14 2006-03-30 Volkswagen Ag Mischeinrichtung und Abgasrückführeinrichtung mit einer Mischeinrichtung
DE102012101851B4 (de) * 2012-03-06 2014-06-05 Pierburg Gmbh Abgaseinleitvorrichtung für eine Verbrennungskraftmaschine

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Also Published As

Publication number Publication date
DE102014114968B4 (de) 2021-01-21
DE102014114968A1 (de) 2016-04-21
EP3012445A1 (fr) 2016-04-27

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