EP1046797B1 - Vanne d'air secondaire pour alimenter de l'air supplémentaire dans les gaz d'échappement d'un moteur à combustion interne - Google Patents

Vanne d'air secondaire pour alimenter de l'air supplémentaire dans les gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP1046797B1
EP1046797B1 EP00107363A EP00107363A EP1046797B1 EP 1046797 B1 EP1046797 B1 EP 1046797B1 EP 00107363 A EP00107363 A EP 00107363A EP 00107363 A EP00107363 A EP 00107363A EP 1046797 B1 EP1046797 B1 EP 1046797B1
Authority
EP
European Patent Office
Prior art keywords
valve
secondary air
valve body
air valve
diaphragm
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
EP00107363A
Other languages
German (de)
English (en)
Other versions
EP1046797A2 (fr
EP1046797A3 (fr
Inventor
Stefan Egger
Klaus Kraft
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1046797A2 publication Critical patent/EP1046797A2/fr
Publication of EP1046797A3 publication Critical patent/EP1046797A3/fr
Application granted granted Critical
Publication of EP1046797B1 publication Critical patent/EP1046797B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives

Definitions

  • the invention relates to a secondary air valve for supplying additional air to the exhaust gas flow of an internal combustion engine, the input of which is on the delivery side an air pump and its output with the exhaust system of the internal combustion engine connected, and being one crossing from the entrance valve body of the secondary air valve controlling the output by means of a spring element is held in its closed position and by means of a membrane placed in a valve control chamber by loading one side of this membrane with excess pressure provided by the air pump is opened.
  • a secondary air valve forms at least internal ones State of the art, in addition to the technical environment DE 43 26 340 A1 referenced.
  • a second, such secondary air valve is known from US 5 491 976 A.
  • a secondary air valve according to the preamble of claim 1 serves the supply of a fresh air flow promoted by a secondary air pump to control the exhaust gas flow of an internal combustion engine or in those Operating states in which no addition of fresh air to the Internal combustion engine exhaust gas flow should take place, a quasi backflow to prevent from engine exhaust gas to the air pump.
  • the valve body of the secondary air valve with the help of the internal combustion engine generated or at partial load of a quantity-controlled Internal combustion engine in their suction system present negative pressure actuated.
  • the valve body is in its by a spring element held closed position and by pressurizing one in the secondary air valve provided control chamber, which from one to the Valve body acting membrane is limited, opened with negative pressure.
  • This known prior art is in the above DE 43 26 340 A1 shown.
  • the spring element holding the valve body in its closed position must develop some minimum spring force to ensure that the valve body also in the internal combustion engine exhaust system Typically occurring pressure pulsations - due to this can in the Exhaust system limited in time and place, namely negative pressure occur - is not opened automatically.
  • the spring force must therefore be sufficiently high so that the secondary air valve when the control pressure is not applied - (this serves to open the secondary air valve) - despite the occurrence of vacuum peaks remains closed in the exhaust system.
  • the object of the present invention is therefore to demonstrate measures with the aid of which a valve can be opened on a secondary air valve according to the preamble of claim 1, even with a relatively low positive pressure.
  • the solution to this problem is characterized in that from the outlet of the secondary air valve branches off into the environment a compensation line which is closed by a compensation body rigidly connected to the valve body and thus movably arranged.
  • Advantageous training and further education are included in the subclaims.
  • valve closing force or that of the valve body can be reduced generated spring element holding in its closed position Spring force due to the presence of the above-mentioned compensating line the movably arranged therein and rigidly connected to the valve body Compensation body.
  • valve body and the compensating body preferably have a substantially same cross-sectional area.
  • the output 2 of the secondary air valve is connected to the exhaust system of an internal combustion engine.
  • a transition 3 is provided, via which a connection be established between input 1 and output 2 can, if a valve body 4 controlling the transition 3 is opened. In In its figurative position, this valve body 4 gives the transition 3 at least partially free, so that a pumped by the secondary air pump Fresh air flow from the entrance 1 through the transition 3 through to the exit 2 of the secondary air valve and from this into the exhaust system Internal combustion engine can get.
  • the plate-shaped valve body 4 starting from its position shown in the direction of arrow 5 moved upwards so that it with its edge section at the transition 3 containing inner partition 6 of the secondary air valve, so is the transition 3 is closed and consequently the connection between the Input 1 and output 2 interrupted.
  • the edge area of the transition 3 on the inner partition 6 is designed as a valve seat 6 'for the valve body 4.
  • a suitable sealing element can be provided in the area of this valve seat 6 ' be provided.
  • valve body 4 can be displaced in or against the direction of the arrow 5.
  • the valve body 4 is in the housing 7 of the secondary air valve also guided in a longitudinally displaceable manner according to arrow direction 5
  • Actuating rod 8 worn the first (here upper) end one So-called intermediate plate 9 carries, which of the cylindrical side wall 10th a so-called.
  • Spring chamber 11 is guided.
  • To the operating rod 8 opposite side of the intermediate plate 9 closes a so-called translation chamber 12 on, the edge of the housing 7 and up again there, i.e. on the side opposite the intermediate plate 9 from a Membrane 13 is limited.
  • a valve control chamber 14 is provided, which in the remaining area of a cover part 15 of the secondary air valve is limited. Is between this cover part 15 and the housing 7 the membrane 13 clamped on the edge.
  • Pressure coil spring formed spring element 17 is arranged in the spring chamber 11 which (here) downwards, i.e. on the intermediate plate 9 opposite side from one to the cylindrical Side wall 10 adjoining bottom plate 16 .
  • This spring element clamped between the base plate 16 and the intermediate plate 9 17 is designed such that it is the (displaceably arranged) Tries to move intermediate plate 9 according to arrow direction 5 (upwards). Since the valve body 4 rigidly with the intermediate plate via the actuating rod 8 9 is connected, this valve body 4 is thus by said Spring element 17 held in its closed position. Furthermore is the spring chamber 11 via a ventilation channel 18 with the environment connected so that in this spring chamber 11 with a longitudinal displacement the valve body 4 (and thus also the intermediate plate 9) none Overpressure or underpressure arises.
  • a so-called displacement of the valve body can be initiated 4 by applying control pressure to the diaphragm 13.
  • the valve control chamber 14 pressurized, for which in the cover part 15 Inlet connector 19 is provided, which via a control line 20 with the Input 1 of the secondary air valve is connected. So that's the beginning called secondary air pump in operation, is located in the input 1 of the secondary air valve Overpressure before, via the control line 20 in the valve control chamber 14 is forwarded. This built up in the control chamber 14 Overpressure moves the membrane 13 downward in the direction of the arrow 5 quasi into the translation chamber 12.
  • the cross-sectional area of the intermediate plate 9 is smaller than that of the membrane 13, so that below this area ratio Interposition of the translation chamber 12 quasi a translation the applied to the membrane 13 from the valve control chamber 14 side Overpressure with a view to an enlarged on the intermediate plate 9 acting force takes place. Using this force ratio is sufficient therefore already a relatively low excess pressure to counter the valve body 4 to actuate the force of the spring element 17 in the opening direction.
  • valve control chamber 14 Pressurizing the valve control chamber 14 causes displacement the membrane 13 or the center of the membrane 13 against the direction of the arrow 5 in a ratio of 1: 1 to the valve body 4.
  • the control pressure introduced into the valve control chamber 14 or overpressure are of sufficient height to accommodate this displacement movement to initiate against the spring force of the spring element 17.
  • Embodiment can then change the gear ratio again existing translation chamber 12 are designed so that a relative small displacement of the membrane 13 against the direction of arrow 5 in one in contrast, larger displacement path of the intermediate plate 9 and thus also the valve body 4 is translated.
  • Such a design, according to which the cross-sectional area of the intermediate plate 9 larger than that the membrane 13 would, in view of a high flow rate of the Secondary air valves may be desirable.
  • the control pressure or overpressure introduced into the valve control chamber 14 are of sufficient height to be relative in terms of distance large displacement movement against the spring force of the spring element 17th to initiate.
  • a so-called compensating line 21 branches off, which is closed by a compensating body 22 which is rigidly connected to the valve body 4 and thus arranged to be movable.
  • a so-called compensating rod 8 'carrying the compensating body 22 is provided on the side of the valve body 4 facing away from the membrane 13.
  • the equalizing rod 8 'and the actuating rod 8 are a single (common) component, ie the actuating rod 8 continues in a straight line up to the compensating body 22 or the compensating rod 8' sits in a straight line up to the intermediate plate 9 away, but this can also be designed differently.
  • the free cross-sectional area of the compensating body 22 is in the essentially equal to the free cross-sectional area of the valve body 4. Acts thus onto the (here lower) surface 4a of the outlet 2 Valve body 4 negative pressure, that of the connected to the output 2 Internal combustion engine exhaust system coming up to this surface 4a is forwarded, the same negative pressure also acts on the Valve body 4 and the outlet 2 facing and thus the environment facing away surface 22a of the compensating body 22.
  • Vent channel 18 can also be created under pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Claims (3)

  1. Vanne d'air secondaire pour fournir de l'air supplémentaire à la veine de gaz d'échappement d'un moteur à combustion interne dont l'entrée (1) est reliée au côté de refoulement d'une pompe à air et sa sortie (2) est reliée à la conduite de gaz d'échappement du moteur à combustion interne, et dont le corps de vanne (4) de la vanne d'air secondaire qui commande ou passage (3) de l'entrée (1) à la sortie (2) est maintenu par un élément de ressort (17) dans sa position fermée et est ouvert par une membrane (13) installée dans une chambre de commande de vanne (14) par sollicitation d'un côté de cette membrane (13) avec la pression fournie par la pompe à air,
    caractérisée en ce que
    une conduite d'équilibrage (21) partant de la sortie (2) de la vanne d'air secondaire débouche à l'extérieur, cette conduite étant fermée par un organe d'équilibrage (22) relié rigidement au corps de vanne (4) et mobile avec celui-ci.
  2. Vanne d'air secondaire selon la revendication 1, dans laquelle le corps de vanne (4) est relié par une tige d'actionnement (8) à la membrane (13) et peut ainsi être soulevé dans la direction longitudinale de cette tige d'actionnement (8) par rapport à son siège (6'),
    caractérisée en ce que
    le côté du corps de vanne (4) à l'opposé de la membrane (13), comporte une tige d'équilibrage (8') portant l'organe d'équilibrage (22).
  3. Vanne d'air secondaire selon la revendication 1 ou 2,
    caractérisée en ce que
    le corps de vanne (4) est relié à un plateau intermédiaire (9) par une tige d'actionnement (8) et peut être soulevé de son siège (6') dans la direction longitudinale de cette tige d'actionnement (8),
    le plateau intermédiaire (9) et la membrane (13) délimitant une chambre de démultiplication (12) remplie d'un fluide et la surface de la section du plateau intermédiaire (9) est différente de celle de la membrane (13).
EP00107363A 1999-04-23 2000-04-05 Vanne d'air secondaire pour alimenter de l'air supplémentaire dans les gaz d'échappement d'un moteur à combustion interne Expired - Lifetime EP1046797B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918469A DE19918469A1 (de) 1999-04-23 1999-04-23 Sekundärluftventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine
DE19918469 1999-04-23

Publications (3)

Publication Number Publication Date
EP1046797A2 EP1046797A2 (fr) 2000-10-25
EP1046797A3 EP1046797A3 (fr) 2000-11-22
EP1046797B1 true EP1046797B1 (fr) 2002-07-03

Family

ID=7905622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107363A Expired - Lifetime EP1046797B1 (fr) 1999-04-23 2000-04-05 Vanne d'air secondaire pour alimenter de l'air supplémentaire dans les gaz d'échappement d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1046797B1 (fr)
DE (2) DE19918469A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT16539U1 (de) 2018-09-10 2019-12-15 Msg Mechatronic Systems Gmbh Ventilvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4307798A1 (de) * 1993-03-12 1994-09-15 Bosch Gmbh Robert Kombiventil
DE4326340C2 (de) 1993-08-05 2001-10-11 Pierburg Ag Pneumatisches Schaltventil
US5491976A (en) * 1994-09-14 1996-02-20 General Motors Corporation Vehicle emission air injection

Also Published As

Publication number Publication date
EP1046797A2 (fr) 2000-10-25
DE50000252D1 (de) 2002-08-08
DE19918469A1 (de) 2000-10-26
EP1046797A3 (fr) 2000-11-22

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