EP1046797B1 - Sekundärluftventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine - Google Patents
Sekundärluftventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine Download PDFInfo
- 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
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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)
Description
Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß vom Ausgang des Sekundärluftventiles eine in der Umgebung mündende Ausgleichsleitung abzweigt, die von einem mit dem Ventilkörper starr verbundenen und somit bewegbar angeordneten Ausgleichskörper verschlossen ist. Vorteilhafte Aus- und Weiterbildungen sind Inhalt der Unteransprüche.
Vom Ausgang 2 des Sekundärluftventiles zweigt eine in der Umgebung mündende sog. Ausgleichsleitung 21 ab, die von einem mit dem Ventilkörper 4 starr verbundenen und somit bewegbar angeordneten Ausgleichskörper 22 verschlossen ist. Dabei ist hier an der der Membran 13 abgewandten Seite des Ventilkörpers 4 eine den Ausgleichskörper 22 tragende sog. Ausgleichsstange 8' vorgesehen. Wie ersichtlich handelt es sich hier bei der Ausgleichsstange 8' sowie bei der Betätigungsstange 8 um ein einziges (gemeinsames) Bauteil, d.h. die Betätigungsstange 8 setzt sich geradlinig bis zum Ausgleichskörper 22 hin fort bzw. die Ausgleichsstange 8' setzt sich geradlinig bis zum Zwischenteller 9 hin fort, jedoch kann dies auch anders gestaltet sein.
- 1
- Eingang
- 2
- Ausgang
- 3
- Übertritt
- 4
- Ventilkörper
- 4a
- Oberfläche (von 4)
- 5
- Pfeilrichtung
- 6
- Innen-Trennwand
- 6'
- Ventilsitz
- 7
- Gehäuse (des Sekundärluftventiles)
- 8
- Betätigungsstange
- 8'
- Ausgleichsstange
- 9
- Zwischenteller
- 10
- zylindrische Seitenwand (von 11)
- 11
- Federkammer
- 12
- Übersetzungskammer
- 13
- Membran
- 14
- Ventil-Steuerkammer
- 15
- Deckelteil (des Sekundärluftventiles)
- 16
- Bodenplatte (von 11)
- 17
- Federelement
- 18
- Entlüftungskanal
- 19
- Eintrittsstutzen (in 15 für 14)
- 20
- Steuerleitung (von 1 zu 19)
- 21
- Ausgleichsleitung
- 22
- Ausgleichskörper
- 22a
- Oberfläche (von 22)
Claims (3)
- Sekundärluft-Ventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine, dessen Eingang (1) mit der Förderseite einer Luftpumpe und dessen Ausgang (2) mit der Abgasanlage der Brennkraftmaschine verbunden ist, und wobei der einen Übertritt (3) vom Eingang (1) zum Ausgang (2) steuernde Ventilkörper (4) des Sekundärluftventiles durch ein Federelement (17) in seiner geschlossenen Position gehalten wird und mittels einer in einer Ventil-Steuerkammer (14) angeordneten Membran (13) durch Beaufschlagen einer Seite dieser Membran (13) mit von der Luftpumpe bereitgestelltem Überdruck geöffnet wird,
dadurch gekennzeichnet, daß vom Ausgang (2) des Sekundärluftventiles eine in der Umgebung mündende Ausgleichsleitung (21) abzweigt, die von einem mit dem Ventilkörper (4) starr verbundenen und somit bewegbar angeordneten Ausgleichskörper (22) verschlossen ist. - Sekundärluft-Ventil nach Anspruch 1, insbesondere wobei der Ventilkörper (4) über eine Betätigungsstange (8) mit der Membran (13) verbunden und somit in Längsrichtung dieser Betätigungsstange (8) von seinem Ventilsitz (6') abhebbar ist,
dadurch gekennzeichnet, daß an der der Membran (13) abgewandten Seite des Ventilkörpers (14) eine den Ausgleichskörper (22) tragende Ausgleichsstange (8') vorgesehen ist. - Sekundärluft-Ventil nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Ventilkörper (4) über eine Betätigungsstange (8) mit einem Zwischenteller (9) verbunden und in Längsrichtung dieser Betätigungsstange (8) von seinem Ventilsitz (6') abhebbar ist, wobei der Zwischenteller (9) sowie die Membran (13) eine mit einem Fluid befüllte Übersetzungskammer (12) begrenzen und die Querschnittsfläche des Zwischentellers (9) ungleich derjenigen der Membran (13) ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19918469 | 1999-04-23 | ||
DE19918469A DE19918469A1 (de) | 1999-04-23 | 1999-04-23 | Sekundärluftventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1046797A2 EP1046797A2 (de) | 2000-10-25 |
EP1046797A3 EP1046797A3 (de) | 2000-11-22 |
EP1046797B1 true EP1046797B1 (de) | 2002-07-03 |
Family
ID=7905622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00107363A Expired - Lifetime EP1046797B1 (de) | 1999-04-23 | 2000-04-05 | Sekundärluftventil zur Zuführung von Zusatzluft zum Abgasstrom einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1046797B1 (de) |
DE (2) | DE19918469A1 (de) |
Families Citing this family (1)
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)
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 |
-
1999
- 1999-04-23 DE DE19918469A patent/DE19918469A1/de not_active Withdrawn
-
2000
- 2000-04-05 EP EP00107363A patent/EP1046797B1/de not_active Expired - Lifetime
- 2000-04-05 DE DE50000252T patent/DE50000252D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50000252D1 (de) | 2002-08-08 |
EP1046797A3 (de) | 2000-11-22 |
EP1046797A2 (de) | 2000-10-25 |
DE19918469A1 (de) | 2000-10-26 |
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