DE20107346U1 - Device for connecting an injection valve to an exhaust system - Google Patents
Device for connecting an injection valve to an exhaust systemInfo
- Publication number
- DE20107346U1 DE20107346U1 DE20107346U DE20107346U DE20107346U1 DE 20107346 U1 DE20107346 U1 DE 20107346U1 DE 20107346 U DE20107346 U DE 20107346U DE 20107346 U DE20107346 U DE 20107346U DE 20107346 U1 DE20107346 U1 DE 20107346U1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- exhaust system
- tip
- injection valve
- cutting ring
- 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
- 238000002347 injection Methods 0.000 title claims description 13
- 239000007924 injection Substances 0.000 title claims description 13
- 238000001816 cooling Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 244000309464 bull Species 0.000 description 2
- 241001552576 Picris hieracioides Species 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000746 purification 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
- F01N3/20—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 specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/11—Adding substances to exhaust gases the substance or part of the dosing system being cooled
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
- Fuel-Injection Apparatus (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Description
••'TATENTA*flWÄ£TE " **' DIPL.-ING. F. W. MOLL ■ DIPL.-ING. H. CH. BITTERICH••'TATENTA*flWÄ£TE " **' DIPL.-ING. F. W. MOLL ■ DIPL.-ING. H. CH. BITTERICH
B/Fa.B/Co.
Heinrich Gillet GmbH & Co. KG, 67480 EdenkobenHeinrich Gillet GmbH & Co. KG, 67480 Edenkoben
Vorrichtung zum Verbinden eines Einspritzventils mit einer AbgasanlageDevice for connecting an injection valve to an exhaust system
KORRESPONDENZ ^ ^ KANZLEj .. . . BANKVERBINDUNGEN CORRESPONDENCE ^ ^ KA N ZLEj .. . . BANK CONNECTIONS
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TELEGRAMME INVENTION FAX 0 63 41 / 2 03 56 275 62-676 (BLZ 545 100 67)TELEGRAM INVENTION FAX 0 63 41 / 2 03 56 275 62-676 (bank code 545 100 67)
Beschreibung:Description:
Die Erfindung betrifft Vorrichtungen zum Verbinden eines Einspritzventils mit Ventilspitze mit einer Abgasanlage für Dieselmotoren gemäß dem Oberbegriff des Anspruchs 1.The invention relates to devices for connecting an injection valve with a valve tip to an exhaust system for diesel engines according to the preamble of claim 1.
Bei der katalytischen Entgiftung von Dieselmotorabgasen mittels SCR-Verfahren wird als Reduktionsmittel Ammoniak benötigt. Ammoniak entsteht im heißen Abgas am Katalysator aus einer wässrigen Harnstofflösung, die über ein rechnergesteuertes Einspritzventil in die Abgasanlage dosiert eingespritzt wird. Die wässrige Harnstofflösung wird in einem eigenen Tanksystem im Fahrzeug mitgeführt.Ammonia is required as a reducing agent for the catalytic detoxification of diesel engine exhaust gases using the SCR process. Ammonia is produced in the hot exhaust gas at the catalyst from an aqueous urea solution, which is injected into the exhaust system in doses via a computer-controlled injection valve. The aqueous urea solution is carried in the vehicle in a separate tank system.
Die Abgase von Dieselmotoren können bis zu 650 0C heiß sein. Die Rohre und Gehäuse der Abgasanlage erreichen entsprechend hohe Werte. Setzt man das Einspritzventil für die Harnstofflösung ohne besondere Maßnahmen in die Abgasanlage ein, so kann die wässrige Harnstofflösung im Ventil verdampfen oder dieses thermisch überlasten. Dadurch wird die exakte Dosierung unmöglich und die Abgasreinigung fällt aus.The exhaust gases from diesel engines can reach temperatures of up to 650 0 C. The pipes and housings of the exhaust system reach correspondingly high values. If the injection valve for the urea solution is installed in the exhaust system without special measures, the aqueous urea solution can evaporate in the valve or thermally overload it. This makes precise dosing impossible and exhaust gas purification fails.
Aus der DE-A 199 08 953 ist eine Vorrichtung zum Verbinden des Einspritzventils mit der Abgasanlage für Dieselmotoren bekannt, bei der eine Buchse die Verbindung zwischen Abgasanlage und Ventil herstellt. Das Ventil ist lösbar mit der Buchse verbunden, wobei eine spezielle Ausbildung der Berührungsflächen eine hohe Dichtigkeit bei geringem Wärmeübergang garantieren soll. Es hat sich jedoch herausgestellt, dass diese Art der Verbindung den hohen Belastungen im Fahrbetrieb nicht immer standhalten konnte, so dass es zu Undichtigkeiten kam.DE-A 199 08 953 discloses a device for connecting the injection valve to the exhaust system for diesel engines, in which a bushing creates the connection between the exhaust system and the valve. The valve is detachably connected to the bushing, with a special design of the contact surfaces intended to guarantee a high level of tightness with low heat transfer. However, it has been found that this type of connection could not always withstand the high loads during driving, which led to leaks.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, bei der dies mit Sicherheit ausgeschlossen ist.The present invention is therefore based on the object of specifying a device of the type mentioned at the outset in which this is definitely excluded.
Diese Aufgabe wird gelöst durch eine Vorrichtung mit den Merkmalen des Anspruchs 1.This object is achieved by a device having the features of claim 1.
Die wesentlichen Vorteile der vorliegenden Erfindung sind darin zu sehen, dass die Spitze des Ventils über eine größere Länge fixiert ist, wodurch sich eine mechanisch stabile Verbindung ergibt, dass diese Verbindung auch dauerhaft dicht ist, weil es sich um die seit Jahrzehnten bewährte Schneidringdichtung handelt, und dass das Ventil nach wie vor ausgewechselt werden kann, wenn das erforderlich werden sollte. Undichtigkeiten aufgrund von Vibrationen während des Fahrbetriebs können nicht mehr auftreten.The main advantages of the present invention are that the tip of the valve is fixed over a greater length, which results in a mechanically stable connection, that this connection is also permanently tight because it is a cutting ring seal that has proven itself for decades, and that the valve can still be replaced if necessary. Leaks due to vibrations during driving can no longer occur.
Falls über den relativ großflächigen metallischen Kontakt zwischen Abgasanlage und Einspritzventil zu viel Wärme auf das Einspritzventil übertragen werden sollte, kann gemäß einer Weiterbildung der Erfindung zwischen Ventilspitze und Schneidring bzw. Ventilstutzen eine Büchse aus Isoliermaterial, insbesondere aus einem Wärme schlecht leitenden Material, z. B. Kunststoff, eingeschoben werden. Diese Kunststoffbüchse behindert weder die Montagefreundlichkeit noch die Dichtigkeit, senkt jedoch den Wärmeübergang entscheidend.If too much heat is transferred to the injection valve via the relatively large-area metallic contact between the exhaust system and the injection valve, a further development of the invention allows a sleeve made of insulating material, particularly a material that is a poor conductor of heat, such as plastic, to be inserted between the valve tip and the cutting ring or valve socket. This plastic sleeve does not hinder the ease of assembly or the tightness, but significantly reduces the heat transfer.
Eine weitere Verringerung der Wärme lässt sich dadurch erreichen, dass zwischen Abgasanlage und Ventilstutzen ein zusätzlicher Verbindungsstutzen vorgesehen ist, der aus einem Stück Rohr gebildet ist, dessen ventilseitiges Ende unter Ausbildung von Kühlfahnen passend zu den Abmessungen des Ventilstutzens verjüngt ist.A further reduction in heat can be achieved by providing an additional connecting piece between the exhaust system and the valve nozzle, which is made from a piece of pipe whose valve-side end is tapered to form cooling fins to match the dimensions of the valve nozzle.
• ··
• · I· I
Anhand der Zeichnung soll die Erfindung in Form eines Ausführungsbeispiels näher erläutert werden. Es zeigenThe invention will be explained in more detail in the form of an embodiment with reference to the drawing.
Fig. 1 teilweise längsgeschnitten eine Vorrichtung zum Verbinden eines Einspritzventils mit einer Abgasanlage für Dieselmotoren undFig. 1 partially sectioned, a device for connecting an injection valve to an exhaust system for diesel engines and
Fig. 2 um 90° gedreht die Vorrichtung der Fig. 1.Fig. 2 shows the device of Fig. 1 rotated by 90°.
Fig. 1 als Teillängsschnitt und Fig. 2 als demgegenüber um 90° gedrehte Ansicht zeigen eine Vorrichtung 1 zum Verbinden eines Einspritzventils 2 mit Ventilspitze 3 mit einer Abgasanlage für Dieselmotoren, von der nur ein Rohrstück 7 dargestellt ist.Fig. 1 as a partial longitudinal section and Fig. 2 as a view rotated by 90° show a device 1 for connecting an injection valve 2 with valve tip 3 to an exhaust system for diesel engines, of which only a pipe section 7 is shown.
In das Abgasrohr 7 ist zunächst ein Verbindungsstutzen 4, 5 mit Hilfe einer Schweißnaht 6 eingesetzt. Der Verbindungsstutzen besteht aus einem Stück Rohr 4, dessen freies Ende unter Ausbildung von Kühlfahnen 5 konisch verjüngt ist. Die Kühlfahnen 5 haben die Aufgabe, die wärmeabgebende Oberfläche möglichst groß zu halten.A connecting piece 4, 5 is first inserted into the exhaust pipe 7 using a weld seam 6. The connecting piece consists of a piece of pipe 4, the free end of which is conically tapered to form cooling vanes 5. The cooling vanes 5 have the task of keeping the heat-emitting surface as large as possible.
In die konisch verjüngte Öffnung des Verbindungsstutzens 4, 5 ist ein Ventilstutzen 8 montiert. Dieser besitzt eine konische Innenfläche und ein Außengewinde. Die Ventilspitze 3 des Einspritzventils 2 taucht in den Ventilstutzen 8 ein.A valve socket 8 is mounted in the conically tapered opening of the connecting socket 4, 5. This has a conical inner surface and an external thread. The valve tip 3 of the injection valve 2 is immersed in the valve socket 8.
Zwischen der Ventilspitze 3 und der konischen Innenfläche des Ventilstutzens 8 sitzt ein Schneidring 9 mit konischer Außenfläche. Eine Überwurfmutter 10 verkeilt den Schneidring 9 zwischen der Ventilspitze 3 und dem Ventilstutzen 8. Auf diese Weise wird eine mechanisch feste und gas- und flüssigkeitsdichte Verbindung hergestellt. Gleichzeitig bleibt jedoch das Einspritzventil 2 jederzeit auswechselbar.A cutting ring 9 with a conical outer surface is located between the valve tip 3 and the conical inner surface of the valve socket 8. A union nut 10 wedges the cutting ring 9 between the valve tip 3 and the valve socket 8. In this way, a mechanically strong and gas and liquid-tight connection is created. At the same time, however, the injection valve 2 can still be replaced at any time.
Um den Wärmeübergang vom Ventilstutzen 8 über den Schneidring 9 auf die Ventilspitze 3 zu reduzieren, ist auf die Ventilspitze 3 eine Büchse 11 aus einem Wärme schlecht leitenden Material aufgesteckt. Die Büchse 11 kann aus einem mäßig wärmebeständigen Kunststoff bestehen. Die
mechanische Festigkeit und insbesondere die Gas- und
Flüssigkeitsdichtigkeit der Verbindungsvorrichtung werden dadurch nicht beeinflusst.In order to reduce the heat transfer from the valve socket 8 via the cutting ring 9 to the valve tip 3, a bushing 11 made of a material that is a poor conductor of heat is placed on the valve tip 3. The bushing 11 can be made of a moderately heat-resistant plastic.
mechanical strength and in particular the gas and
This does not affect the liquid tightness of the connecting device.
Claims (4)
ein Ventilstutzen (8)
ist einerseits mit der Abgasanlage (7) verbunden
und besitzt andererseits
eine konische Innenfläche
und ein Außengewinde,
die Ventilspitze (3) taucht in den Ventilstutzen (8) ein,
ein Schneidring mit konischer Außenfläche und einem Längsschlitz sitzt zwischen der Spitze (3) des Ventils (2) und der konischen Innenfläche des Ventilstutzens (8),
eine Überwurfmutter (10) verkeilt den Schneidring (9) zwischen Ventilspitze (3) und Ventilstutzen (8). 1. Device ( 1 ) for connecting an injection valve ( 2 ) with valve tip ( 3 ) to an exhaust system ( 7 ) for diesel engines, characterized by the features:
a valve socket ( 8 )
is connected to the exhaust system ( 7 )
and on the other hand has
a conical inner surface
and an external thread,
the valve tip ( 3 ) is immersed in the valve nozzle ( 8 ),
a cutting ring with a conical outer surface and a longitudinal slot is located between the tip ( 3 ) of the valve ( 2 ) and the conical inner surface of the valve nozzle ( 8 ),
a union nut ( 10 ) wedges the cutting ring ( 9 ) between the valve tip ( 3 ) and the valve socket ( 8 ).
zwischen Ventilspitze (3) und Schneidring (9) bzw. Ventilstutzen (8) sitzt eine Büchse (11) aus Isoliermaterial. 2. Device according to claim 1, characterized by the feature:
A bushing ( 11 ) made of insulating material is located between the valve tip ( 3 ) and the cutting ring ( 9 ) or valve nozzle ( 8 ).
die Büchse (11) besteht aus einem Wärme schlecht leitenden Material, z. B. Kunststoff. 3. Device according to claim 2, characterized by the feature:
the bushing ( 11 ) is made of a material that is a poor conductor of heat, e.g. plastic.
zwischen Abgasanlage (7) und Ventilstutzen (8) ist ein Verbindungsstutzen (4, 5) vorgesehen,
der Verbindungsstutzen ist aus einem Stück Rohr (4) gebildet, dessen ventilseitiges Ende unter Ausbildung von Kühlfahnen (5) verjüngt ist. 4. Device according to one of claims 1 to 3, characterized by the features:
a connecting piece ( 4 , 5 ) is provided between the exhaust system ( 7 ) and the valve piece ( 8 ),
the connecting piece is formed from a piece of pipe ( 4 ), the valve-side end of which is tapered to form cooling vanes ( 5 ).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20107346U DE20107346U1 (en) | 2001-04-27 | 2001-04-27 | Device for connecting an injection valve to an exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20107346U DE20107346U1 (en) | 2001-04-27 | 2001-04-27 | Device for connecting an injection valve to an exhaust system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20107346U1 true DE20107346U1 (en) | 2001-09-06 |
Family
ID=7956333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20107346U Expired - Lifetime DE20107346U1 (en) | 2001-04-27 | 2001-04-27 | Device for connecting an injection valve to an exhaust system |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20107346U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123650A1 (en) | 2005-05-17 | 2006-11-23 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification system for engine |
-
2001
- 2001-04-27 DE DE20107346U patent/DE20107346U1/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006123650A1 (en) | 2005-05-17 | 2006-11-23 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification system for engine |
| EP1890015A1 (en) * | 2005-05-17 | 2008-02-20 | Nissan Diesel Motor Co., Ltd. | Exhaust gas purification system for engine |
| EP1890015A4 (en) * | 2005-05-17 | 2009-08-12 | Nissan Diesel Motor Co | Exhaust gas purification system for engine |
| US8181446B2 (en) | 2005-05-17 | 2012-05-22 | Nissan Diesel Motor Co., Ltd. | Exhaust emission purification apparatus for engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 20011011 |
|
| R081 | Change of applicant/patentee |
Owner name: HEINRICH GILLET GMBH, DE Free format text: FORMER OWNER: HEINRICH GILLET GMBH & CO KG, 67480 EDENKOBEN, DE Effective date: 20031028 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20040708 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20070522 |
|
| R158 | Lapse of ip right after 8 years |
Effective date: 20091103 |