DE9415251U1 - Check valve for a gas line - Google Patents
Check valve for a gas lineInfo
- Publication number
- DE9415251U1 DE9415251U1 DE9415251U DE9415251U DE9415251U1 DE 9415251 U1 DE9415251 U1 DE 9415251U1 DE 9415251 U DE9415251 U DE 9415251U DE 9415251 U DE9415251 U DE 9415251U DE 9415251 U1 DE9415251 U1 DE 9415251U1
- Authority
- DE
- Germany
- Prior art keywords
- check valve
- valve
- closing
- closing element
- limiting 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
Links
- 239000004809 Teflon Substances 0.000 claims description 6
- 229920006362 Teflon® Polymers 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000000806 elastomer Substances 0.000 claims description 2
- 239000012528 membrane Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F01N3/227—Control of additional air supply only, e.g. using by-passes or variable air pump drives using pneumatically operated valves, e.g. membrane valves
-
- 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
-
- 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
- F01N3/24—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 constructional aspects of converting apparatus
- F01N3/30—Arrangements for supply of additional air
- F01N3/34—Arrangements for supply of additional air using air conduits or jet air pumps, e.g. near the engine exhaust port
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1262—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being spring loaded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Feeding And Controlling Fuel (AREA)
- Check Valves (AREA)
Description
Die Neuerung betrifft ein Rückschlagventil für eine Gasleitung, insbesondere für eine Leitung zur Sekundärluftzuführung in ein Abgassystem einer Brennkraftmaschine nach dem Oberbegriff des Schutzanspruchs 1.The innovation relates to a check valve for a gas line, in particular for a line for supplying secondary air to an exhaust system of an internal combustion engine according to the preamble of claim 1.
Ein derartiges System ist Gegenstand der DE-A1-40 25 267 und weist dort bereits die Merkmale auf, daß ein Begrenzungselement durch eine pneumatisch bzw. elektrisch betriebene Stelleinrichtung in Richtung des Schließelementes verstellbar ist und das Schließelement bei Abschaltung der Sekundärluft in Schließstellung blockiert.Such a system is the subject of DE-A1-40 25 267 and already has the features therein that a limiting element can be adjusted in the direction of the closing element by means of a pneumatically or electrically operated adjusting device and that the closing element is blocked in the closed position when the secondary air is switched off.
Aus der DE-A1-42 29 414 ist ein pneumatisches Abschaltventil bekannt und dient dort zum Abschalten der Lufteinblasung in das Abgasrohr der Brennkraftmaschine bei höherem Lastbetrieb oder Heißbetrieb der Brennkraftmaschine. Die Schließkraft des Schaltventils wird durch eine Druckfeder erzeugt, deren Kraft bei Öffnung des Ventils durch Membrankraft überwunden wird. Schließkraft und Membrankraft stehen also in einem direkten Verhältnis. Um die Membrangröße begrenzen zu können, wird das Stellelement in den Schließphasen vom Abgasdruck beaufschlagt.A pneumatic shut-off valve is known from DE-A1-42 29 414 and is used there to shut off the air injection into the exhaust pipe of the internal combustion engine when the internal combustion engine is operating at high loads or when it is hot. The closing force of the switching valve is generated by a compression spring, the force of which is overcome by the diaphragm force when the valve is opened. Closing force and diaphragm force are therefore directly related. In order to be able to limit the size of the diaphragm, the actuating element is subjected to exhaust pressure during the closing phases.
Das aus der ersten Druckschrift bekannte Rückschlagventil neigt bei Abschaltung zur Verschmutzung durch Abgasrückstände und -kondensate, das aus der zweiten Druckschrift bekannte Abschaltventil neigt zum Kleben im geschlossenen Zustand wegen der großen Schließkräfte, so daß eine ordnungsgemäße Funktion nicht immer vorliegt.The check valve known from the first publication tends to become contaminated by exhaust gas residues and condensates when switched off, the shut-off valve known from the second publication tends to stick when closed due to the high closing forces, so that it does not always function properly.
Hiervon ausgehend liegt der Neuerung die Aufgabe zugrunde, ein gattungsgemäßes Rückschlagventil derart auszubilden, daß die Nachteile des behandelten Standes der Technik beseitigt sind.Based on this, the innovation is based on the task of designing a generic check valve in such a way that the disadvantages of the prior art discussed are eliminated.
Diese Aufgabe ist durch die im Kennzeichen des Schutzanspruchs 1 genannten Merkma-Ie gelöst. Vorteilhafte Weiterbildungen sind mit den Unteransprüchen angegeben.This problem is solved by the features mentioned in the characterizing part of claim 1. Advantageous further developments are specified in the subclaims.
Ein Ausführungsbeispiel der Neuerung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben.An example of the innovation is shown in the drawing and is described below.
S.p.
Die Zeichnung zeigt ein neuerungsgemäßes Rückschlagventil 1 in einem Längsschnitt, das aus einem zusammengesetzten Gehäuse 2 besteht, mit einem Fianschansatz 3 zur Anordnung auf einem nicht dargestellten Abgasrohr einer Brennkraftmaschine und einem Anschlußstutzen 4 für gefilterte Atmosphärenluft und einer pneumatischen Betätigungseinrichtung 5, deren Arbeitskammer 6 mit niedrigem Druck beaufschlagbar ist über einen Anschlußstutzen 7, so daß eine Verstellkraft an einer Membrane 8 entsteht, die gegen eine Druckfeder 9 wirkt und eine Membranstange 10 verstellt. Die Membranstange 10 ragt durch eine Führungsöffnung 11 einer in das Gehäuse 2 eingesetzten Ventilplatte 12 hindurch, wobei die Ventilplatte 12 mit einem oder mehreren Durchbrüchen 13 für das zu steuernde Medium versehen ist, mit mindestens einem Schließelement 14, einem Federelement 15 und einem Begrenzungselement 16.The drawing shows a check valve 1 according to the innovation in a longitudinal section, which consists of a composite housing 2, with a flange attachment 3 for arranging on an exhaust pipe (not shown) of an internal combustion engine and a connecting piece 4 for filtered atmospheric air and a pneumatic actuating device 5, the working chamber 6 of which can be subjected to low pressure via a connecting piece 7, so that an adjusting force is created on a membrane 8, which acts against a compression spring 9 and adjusts a membrane rod 10. The membrane rod 10 extends through a guide opening 11 of a valve plate 12 inserted into the housing 2, the valve plate 12 being provided with one or more openings 13 for the medium to be controlled, with at least one closing element 14, a spring element 15 and a limiting element 16.
Neuerungsgemäß ist das Begrenzungselement 16 gleichzeitig als Schaltventil 17 ausgebildet und weist eine Ausnehmung 18 auf, die bei geschlossenem Schaltventil 17 das Schließelement 14 des Rückschlagventils 1 bzw. der Ventilplatte 12 aufnimmt.According to the innovation, the limiting element 16 is simultaneously designed as a switching valve 17 and has a recess 18 which, when the switching valve 17 is closed, accommodates the closing element 14 of the check valve 1 or the valve plate 12.
Vorteilhafterweise ist vorgesehen, daß das Federelement 15 des Rückschlagventils 1 bzw. der Ventilplatte 1 2 durch eine oder mehrere Druckfedern 19 gebildet ist, die in eine oder mehrere Ausnehmungen 20 des Begrenzungselements 16 angeordnet sind und sich an dem Begrenzungseiement 16 und dem Schließelement 14 abstützen.Advantageously, it is provided that the spring element 15 of the check valve 1 or the valve plate 12 is formed by one or more compression springs 19, which are arranged in one or more recesses 20 of the limiting element 16 and are supported on the limiting element 16 and the closing element 14.
Um eine hohe Dichtwirkung zu erzielen, ist vorgesehen, daß das Begrenzungselement 16 und das Schließelement 14 mit jeweils einem Ventilsitz 21, 22 der Ventilplatte 12 zusammenwirken, der aus einem Elastomer gebildet ist, wobei darüber hinaus das Begrenzungselement 16 und/oder das Schließelement 14 auf der Fläche, die mit dem Ventilsitz 21, 22 zusammenwirkt, eine Teflon(PTFE)-Schicht aufweist bzw. ganz aus PTFE besteht.In order to achieve a high sealing effect, it is provided that the limiting element 16 and the closing element 14 each interact with a valve seat 21, 22 of the valve plate 12, which is made of an elastomer, wherein the limiting element 16 and/or the closing element 14 also has a Teflon (PTFE) layer on the surface that interacts with the valve seat 21, 22 or consists entirely of PTFE.
Diese Maßnahme verhindert ein Kleben des Schließ- und/oder Begrenzungselements 14/16 auf dem Ventilsitz 21, 22.This measure prevents the closing and/or limiting element 14/16 from sticking to the valve seat 21, 22.
Für eine besonders wirtschaftliche Fertigung ist vorgesehen, daß das Schließelement 14 und das Begrenzungselement 16 rotationssymmetrisch ausgebildet sind.For particularly economical production, it is intended that the closing element 14 and the limiting element 16 are rotationally symmetrical.
S.p.
Das Begrenzungselement 16 ist auf die Membranstange 10 aufgepreßt. Die Membranstange 10 weist einen Lagerabschnitt 23 auf, auf dem das Schließelement 14 radial gelagert ist. Bei der Montage liegt das Schiießelement 14 unter der Wirkung der eingespannten Druckfedern 19 gegen einen Bund 24 des Lagerabschnitts 23 an. 5The limiting element 16 is pressed onto the diaphragm rod 10. The diaphragm rod 10 has a bearing section 23 on which the closing element 14 is radially mounted. During assembly, the closing element 14 rests against a collar 24 of the bearing section 23 under the action of the clamped compression springs 19. 5
Mit dem neuerungsgemäßen Rückschlagventil 1 sind die Funktionen des Rückschlagventils mit denen eines Abschaitventils vereinigt worden, wobei die Schließkraft des Schließelements 14 unabhängig von der Rückstellkraft der Membrandruckfedern 9 ist, so daß das Schließelement 14 bei abgestelltem Unterdruck an der Membrane 8 nur von den Druckfedern 19 gegen den Ventilsitz 21 belastet ist.With the new check valve 1, the functions of the check valve have been combined with those of a shut-off valve, whereby the closing force of the closing element 14 is independent of the restoring force of the diaphragm pressure springs 9, so that when the negative pressure on the diaphragm 8 is switched off, the closing element 14 is only loaded by the pressure springs 19 against the valve seat 21.
Durch die Teflon(PTFE)-Schicht wird die Adhäsion zwischen Ventilsitz 21, 22 und Schließelement 14 bzw. Begrenzungselement 16 vermindert. Die Teflonschicht kann durch Beschichtung oder Zwischenlage einer Teflonscheibe hergestellt werden.The Teflon (PTFE) layer reduces the adhesion between the valve seat 21, 22 and the closing element 14 or limiting element 16. The Teflon layer can be produced by coating or interposing a Teflon disk.
S.p.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9415251U DE9415251U1 (en) | 1994-09-20 | 1994-09-20 | Check valve for a gas line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9415251U DE9415251U1 (en) | 1994-09-20 | 1994-09-20 | Check valve for a gas line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9415251U1 true DE9415251U1 (en) | 1994-11-24 |
Family
ID=6913927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9415251U Expired - Lifetime DE9415251U1 (en) | 1994-09-20 | 1994-09-20 | Check valve for a gas line |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE9415251U1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006024728A1 (en) * | 2006-05-26 | 2007-11-29 | Pierburg Gmbh | Automotive valve |
| EP2014887A2 (en) | 2007-07-10 | 2009-01-14 | Pierburg GmbH | Combined check and control valve |
| DE102013215417A1 (en) * | 2013-08-06 | 2015-02-12 | Volkswagen Aktiengesellschaft | System for secondary air injection for an internal combustion engine |
| DE102019100402B3 (en) | 2019-01-09 | 2020-06-10 | Hutchinson Gmbh | Valve device for selectively enabling or blocking an exhaust gas recirculation or secondary air flow for an exhaust gas aftertreatment system |
| DE102019102208A1 (en) | 2019-01-29 | 2020-07-30 | Kendrion (Villingen) Gmbh | Pressure controlled valve |
-
1994
- 1994-09-20 DE DE9415251U patent/DE9415251U1/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006024728A1 (en) * | 2006-05-26 | 2007-11-29 | Pierburg Gmbh | Automotive valve |
| EP1860315A3 (en) * | 2006-05-26 | 2008-05-28 | Pierburg GmbH | Motor vehicle valve |
| EP2014887A2 (en) | 2007-07-10 | 2009-01-14 | Pierburg GmbH | Combined check and control valve |
| DE102007031957A1 (en) | 2007-07-10 | 2009-01-22 | Pierburg Gmbh | Combined non-return and control valve |
| EP2014887A3 (en) * | 2007-07-10 | 2009-11-25 | Pierburg GmbH | Combined check and control valve |
| US8047502B2 (en) | 2007-07-10 | 2011-11-01 | Pierburg Gmbh | Combined check and control valve |
| DE102013215417A1 (en) * | 2013-08-06 | 2015-02-12 | Volkswagen Aktiengesellschaft | System for secondary air injection for an internal combustion engine |
| DE102013215417B4 (en) | 2013-08-06 | 2023-07-27 | Volkswagen Aktiengesellschaft | Secondary air injection system for an internal combustion engine |
| DE102019100402B3 (en) | 2019-01-09 | 2020-06-10 | Hutchinson Gmbh | Valve device for selectively enabling or blocking an exhaust gas recirculation or secondary air flow for an exhaust gas aftertreatment system |
| WO2020144255A1 (en) | 2019-01-09 | 2020-07-16 | Kendrion (Villingen) Gmbh | Valve device for selectively releasing or blocking an exhaust gas recirculation flow or secondary air flow for an exhaust gas aftertreatment system |
| CN113454329A (en) * | 2019-01-09 | 2021-09-28 | 肯德隆（菲林根）有限公司 | Valve device for selectively releasing or blocking an exhaust gas recirculation flow or a secondary air flow for an exhaust gas aftertreatment device |
| CN113454329B (en) * | 2019-01-09 | 2023-08-29 | 肯德隆（菲林根）有限公司 | Valve device |
| DE102019102208A1 (en) | 2019-01-29 | 2020-07-30 | Kendrion (Villingen) Gmbh | Pressure controlled valve |
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