DE102008045959A1 - Reducing agent supply system for selective catalytic reduction catalyst of internal-combustion engine, has cylinder with combustion chamber and exhaust tract - Google Patents
Reducing agent supply system for selective catalytic reduction catalyst of internal-combustion engine, has cylinder with combustion chamber and exhaust tract Download PDFInfo
- Publication number
- DE102008045959A1 DE102008045959A1 DE102008045959A DE102008045959A DE102008045959A1 DE 102008045959 A1 DE102008045959 A1 DE 102008045959A1 DE 102008045959 A DE102008045959 A DE 102008045959A DE 102008045959 A DE102008045959 A DE 102008045959A DE 102008045959 A1 DE102008045959 A1 DE 102008045959A1
- Authority
- DE
- Germany
- Prior art keywords
- reducing agent
- combustion chamber
- combustion engine
- cylinder
- exhaust tract
- 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.)
- Granted
Links
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]
-
- 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
- F01N3/36—Arrangements for supply of additional fuel
-
- 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
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- 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
Abstract
Description
Die Erfindung betrifft ein Reduktionsmittelzuführsystem für eine Brennkraftmaschine. Die Brennkraftmaschine umfasst einen Zylinder mit einem Brennraum und einen Abgastrakt. Der Abgastrakt kommuniziert abhängig von einer Schaltstellung eines Gasauslassventils mit dem Brennraum. Das Reduktionsmittelzuführsystem umfasst ein Reduktionsmitteleinspritzventil zum Zumessen von Reduktionsmittel in den Abgastrakt. Ferner umfasst das Reduktionsmittelzuführsystem einen Reduktionsmitteltank, aus dem über eine Reduktionsmittelleitung Reduktionsmittel zu dem Reduktionsmitteleinspritzventil geleitet werden kann.The This invention relates to a reductant delivery system for an internal combustion engine. The internal combustion engine comprises a cylinder with a combustion chamber and an exhaust tract. The exhaust tract communicates depending on a switching position of a gas outlet valve with the combustion chamber. The reductant delivery system includes a reductant injection valve for metering reductant in the exhaust tract. Further, the reductant delivery system includes a reducing agent tank from which via a reducing agent line Reductant passed to the reducing agent injection valve can be.
Zur Reduzierung eines Stickoxidanteils im Abgas einer Brennkraftmaschine kann eine Abgasnachbehandlung mit wässriger Reduktionsmittellösung und einem SCR-Katalysator durchgeführt werden. Die wässrige Reduktionsmittellösung kann auch als Reduktionsmittel bezeichnet werden. Bevorzugt ist das Reduktionsmittel Harnstoff. Zur Abgasnachbehandlung wird die wässrige Reduktionsmittellösung mit einer Flüssigkeitspumpe zu einem Reduktionsmitteleinspritzventil gepumpt, das die Reduktionsmittellösung stromaufwärts des SCR-Katalysators in einen Abgasstrom in einem Abgastrakt der Brennkraftmaschine zumisst. Die Reduktionsmittellösung reagiert in dem heißen Abgasstrom bevorzugt zu Ammoniak und Kohlendioxid. In dem SCR-Katalysator reagiert dann der Ammoniak mit dem Stickoxidgemisch des Abgases zu Stickstoff und Wasser.to Reduction of a nitrogen oxide content in the exhaust gas of an internal combustion engine can be an exhaust aftertreatment with aqueous reducing agent solution and performed an SCR catalyst become. The watery Reducing Agent Solution can also be referred to as a reducing agent. Is preferred the reducing agent urea. For exhaust aftertreatment is the aqueous Reducing Agent Solution with a liquid pump pumped to a reductant injection valve which receives the reductant solution upstream of the reductant solution SCR catalyst in an exhaust gas stream in an exhaust tract of the internal combustion engine attaches. The reducing agent solution reacts in the hot Exhaust gas stream preferably to ammonia and carbon dioxide. In the SCR catalyst reacts then the ammonia with the nitrogen oxide mixture of the exhaust gas to nitrogen and water.
Die Aufgabe der Erfindung ist, ein Reduktionsmittelzuführsystem zu schaffen, das ein genaues Zumessen von Reduktionsmittel in einen Abgastrakt einer Brennkraftmaschine ermöglicht.The The object of the invention is a Reduktionsmittelzuführsystem to create a precise metering of reducing agent in one Exhaust tract of an internal combustion engine allows.
Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Anspruchs.The Task is solved by the characteristics of the independent Claim.
Die Erfindung zeichnet sich aus durch ein Reduktionsmittelzuführsystem für einen SCR-Katalysator einer Brennkraftmaschine. Die Brennkraftmaschine umfasst mindestens einen Zylinder mit einem Brennraum und einen Abgastrakt, dem Abgas aus dem Brennraum zuführbar ist und in dem der SCR-Katalysator angeordnet ist. Das Reduktionsmittelzuführsystem weist auf ein Reduktionsmitteleinspritzventil zum Zumessen von Reduktionsmittel in den Abgastrakt, einen Reduktionsmitteltank, aus dem dem Reduktionsmitteleinspritzventil mittels hydraulischer Aggregate Reduktionsmittel zuführbar ist, und eine Wärmedämmanordnung. In der Wärmedämmanordnung sind der Reduktionsmitteltank und/oder mindestens eines der hydraulischen Aggregate angeordnet. Die Wärmedämmanordnung weist ein Latentwärmespeichermaterial auf.The Invention is characterized by a Reduktionsmittelzuführsystem for one SCR catalytic converter of an internal combustion engine. The internal combustion engine includes at least one cylinder with a combustion chamber and a Exhaust tract, the exhaust gas from the combustion chamber can be fed and in which the SCR catalyst is arranged. The reductant delivery system points to a reductant injection valve for metering reducing agent into the exhaust gas tract, a reducing agent tank, from the reducing agent injection valve by means of hydraulic Aggregates reductant fed is, and a thermal insulation scheme. In the thermal insulation scheme are the reducing agent tank and / or at least one of the hydraulic Aggregates arranged. The thermal insulation arrangement has a latent heat storage material on.
Dies hat den Vorteil, dass ein Einfrieren und/oder Überhitzen des Reduktionsmittels aufgrund der Eigenschaften des Latentwärmespeichermaterials vermieden werden kann. Kurzfristige Temperaturspitzen in der Brennkraftmaschine können in Bereichen innerhalb der Wärmedämmanordnung ausgeglichen werden.This has the advantage that freezing and / or overheating of the reducing agent due to the properties of the latent heat storage material avoided can be. Short-term temperature peaks in the internal combustion engine can in areas within the thermal insulation system be compensated.
Ausführungsbeispiele der Erfindung sind im Folgenden anhand von schematischen Zeichnungen näher erläutert.embodiments The invention are explained in more detail below with reference to schematic drawings.
Es zeigen:It demonstrate:
Elemente gleicher Konstruktion oder Funktion sind figurenübergreifend mit den gleichen Bezugszeichen gekennzeichnet.elements same construction or function are cross-figurative with the same Reference number marked.
In
Der
Zylinderkopf
In
dem Abgastrakt
Die
Brennkraftmaschine weist ferner eine Steuervorrichtung
Die
Sensoren umfassen einen Pedalstellungsgeber
Stromaufwärts des
Oxidationskatalysators
Ferner
ist ein Stickoxidsensor
Ferner
ist dem Abgastrakt
Zum
Zuführen
von Reduktionsmittel ragt das Reduktionsmitteleinspritzventil
Zusätzlich zu
dem Katalysator
Stromabwärts des
Brennraums
Neben dem Zylinder Z1 sind bevorzugt noch weitere Zylinder Z2 bis Z4 vorgesehen, denen ebenfalls entsprechende Stellglieder und gegebenenfalls Sensoren zugeordnet sind.Next the cylinder Z1 are preferably further cylinders Z2 to Z4 provided which also corresponding actuators and optionally sensors assigned.
Das
Reduktionsmittelzuführsystem
Latentwärmespeichermaterialien nutzen die Enthalpie reversibler thermodynamischer Zustandsänderungen eines Speichermaterials. So kann insbesondere der Phasenübergang fest-flüssig genutzt werden. Beim Schmelzen nimmt das Latentwärmespeichermaterial eine vorgegebene Wärmemenge auf. Dieser Vorgang ist reversibel, so dass das Latentwärmespeichermaterial die gespeicherte Wärmemenge beim Erstarren wieder abgeben kann. Besonders vorteilhaft ist, dass die Wärme in einem durch die Schmelztemperatur des eingesetzten Latentwärmespeichermaterials festgelegten Temperaturbereich gespeichert werden kann.Latent heat storage materials use the enthalpy of reversible thermodynamic state changes a storage material. In particular, the phase transition solid-liquid be used. During melting, the latent heat storage material takes a given Amount of heat. This process is reversible, so that the latent heat storage material the stored amount of heat can give off when solidifying. It is particularly advantageous that the heat in a by the melting temperature of the latent heat storage material used specified temperature range can be stored.
Aufgrund
dieser Eigenschaften des Latentwärmespeichermaterials
kann vermieden werden, dass das in dem Reduktionsmittelzuführsystem
Insbesondere
können
so durch die Brennkraftmaschine verursachte kurzfristige Temperaturspitzen
in den innerhalb der Wärmedämmanordnung
Des
Weiteren kann so insbesondere verhindert werden, dass beim Auftreten
von tiefen Temperaturen außerhalb
des Kraftfahrzeugs, beispielsweise bei Außentemperaturen unterhalb von –11°C, Reduktionsmittel
in den innerhalb der Wärmedämmanordnung
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008045959A DE102008045959B4 (en) | 2008-09-04 | 2008-09-04 | Reducing agent supply system for an SCR catalytic converter of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008045959A DE102008045959B4 (en) | 2008-09-04 | 2008-09-04 | Reducing agent supply system for an SCR catalytic converter of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102008045959A1 true DE102008045959A1 (en) | 2010-03-11 |
DE102008045959B4 DE102008045959B4 (en) | 2013-05-08 |
Family
ID=41650715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102008045959A Active DE102008045959B4 (en) | 2008-09-04 | 2008-09-04 | Reducing agent supply system for an SCR catalytic converter of an internal combustion engine |
Country Status (1)
Country | Link |
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DE (1) | DE102008045959B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011119242A1 (en) * | 2011-11-22 | 2013-05-23 | Daimler Ag | Exhaust gas purification device for cleaning exhaust gas flow of combustion engine of motor vehicle, has exhaust gas guide unit with catalytic unit, and storage unit arranged in direct heat transfer contact and adjacent to catalytic unit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018206442A1 (en) | 2018-04-26 | 2019-10-31 | Hyundai Motor Company | Exhaust gas aftertreatment system and method of treating engine exhaust |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4230595A1 (en) * | 1992-09-12 | 1994-03-17 | Bayerische Motoren Werke Ag | Automotive catalytic converter assembly having latent heat storage medium - comprises outer housing surrounding layer of heat insulation |
WO1996008639A1 (en) * | 1994-09-13 | 1996-03-21 | Siemens Aktiengesellschaft | Process and device for introducing a fluid into an exhaust gas purification system |
DE102007047885A1 (en) * | 2006-11-29 | 2008-06-05 | Denso Corp., Kariya | Reductive pressure feed pump for use in reducing agent utility system, has drive section producing drive power for driving mechanical section to discharge pressure to reducing agent, which flows through flow path over drive section |
-
2008
- 2008-09-04 DE DE102008045959A patent/DE102008045959B4/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4230595A1 (en) * | 1992-09-12 | 1994-03-17 | Bayerische Motoren Werke Ag | Automotive catalytic converter assembly having latent heat storage medium - comprises outer housing surrounding layer of heat insulation |
WO1996008639A1 (en) * | 1994-09-13 | 1996-03-21 | Siemens Aktiengesellschaft | Process and device for introducing a fluid into an exhaust gas purification system |
DE102007047885A1 (en) * | 2006-11-29 | 2008-06-05 | Denso Corp., Kariya | Reductive pressure feed pump for use in reducing agent utility system, has drive section producing drive power for driving mechanical section to discharge pressure to reducing agent, which flows through flow path over drive section |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011119242A1 (en) * | 2011-11-22 | 2013-05-23 | Daimler Ag | Exhaust gas purification device for cleaning exhaust gas flow of combustion engine of motor vehicle, has exhaust gas guide unit with catalytic unit, and storage unit arranged in direct heat transfer contact and adjacent to catalytic unit |
DE102011119242B4 (en) * | 2011-11-22 | 2014-04-24 | Daimler Ag | An exhaust gas purification device comprising a heating system for a reducing agent storage device |
Also Published As
Publication number | Publication date |
---|---|
DE102008045959B4 (en) | 2013-05-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
R018 | Grant decision by examination section/examining division | ||
R020 | Patent grant now final |
Effective date: 20130809 |
|
R084 | Declaration of willingness to licence | ||
R081 | Change of applicant/patentee |
Owner name: VITESCO TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
|
R081 | Change of applicant/patentee |
Owner name: VITESCO TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE |