EP3368753A1 - Fluid injection system - Google Patents

Fluid injection system

Info

Publication number
EP3368753A1
EP3368753A1 EP16787902.2A EP16787902A EP3368753A1 EP 3368753 A1 EP3368753 A1 EP 3368753A1 EP 16787902 A EP16787902 A EP 16787902A EP 3368753 A1 EP3368753 A1 EP 3368753A1
Authority
EP
European Patent Office
Prior art keywords
section
injection system
fluid injection
line
injection
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.)
Withdrawn
Application number
EP16787902.2A
Other languages
German (de)
French (fr)
Inventor
Klaus MÜLLER-HAAS
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive GmbH
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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3368753A1 publication Critical patent/EP3368753A1/en
Withdrawn legal-status Critical Current

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
    • 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
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453—Sprayers or atomisers; Arrangement thereof in the exhaust apparatus
    • 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

Definitions

  • the invention relates to a fluid injection system with a line section in which an injection device is arranged, one of which downstream evaporator is associated with the below a catalyst in which a injected from the injector fluid with the exhaust gas enters into a catalytic reaction.
  • a line section arranged upstream of an evaporator device is provided with an injection device, via which the additive is injected into the exhaust gas flow.
  • the efficiency of ⁇ From gas aftertreatment is determined among other things, on the type of injection of additive into the exhaust stream.
  • the additive is injected at an angle to the longitudinal axis of the line section. Good mixing of the additive with the exhaust stream is required to achieve good droplet distribution at the evaporator device. Nevertheless, it has been shown that there is an inhomogeneous droplet distribution at the evaporator device.
  • Object of the present invention is therefore to provide a fluid injection system, which leads to a very homogeneous droplet distribution based on the Kausguer Songs on the evaporator device.
  • the object is achieved in that at least one further Einspritzvor ⁇ direction is arranged in egg ⁇ nem line section.
  • the arrangement of at least one further injection device makes it possible to produce an improved droplet distribution of the injected additive over the entire cross section of the line section, since each injection device only has to produce a uniform droplet distribution for one sector of the cross section. Due to the uniform droplet distribution in the individual sectors through the respective injection devices, a homogeneous droplet distribution results over the entire line cross section.
  • a very good homogeneous droplet distribution over the line cross-section is already achieved in that two injection devices are arranged in the line section.
  • two injection devices are arranged in the line section.
  • the formation of a homogeneous droplet distribution over the entire cross section is achieved according to a further advantageous embodiment in that the injection devices are arranged symmetrically on the circumference of the line section.
  • the injection devices are arranged in the flow direction at the same height. This has the advantage that the line elements, which make up the line section are the same structure.
  • a homogeneous droplet distribution across the wire cross-section can be achieved in that at least one injection device disposed downstream of at least one further ⁇ injection device according to another advantageous embodiment.
  • the offset in the flow direction injectors can be arranged symmetrically distributed on the circumference of the line section.
  • An offset in the flow direction arrangement of the injectors is also advantageous if the space surrounding the line section space is limited such that the arrangement of the injectors at the same level, based on the flow direction, is not possible.
  • the available space can be used particularly effectively when the injectors are arranged asymmetrically, for example, distributed at a distance of 90 ° to the circumference of the line section.
  • the From ⁇ stand of the injectors in the direction of flow between 0.1 to 1.5 times the diameter of the conduction portion preferably 0.2- to 1.0-fold of the weight, through ⁇ diameter of the pipe section and in particular from 0.4 to 0.8-fold the diameter of the pipe section.
  • the injection devices are arranged at the same angle to the longitudinal axis of the line section.
  • Drop distribution is achieved in that at least one injection device is arranged at a different angle to the longitudinal axis of the line section than another injection device.
  • a homogeneous droplet distribution can be achieved in that at least one injection device produces a different spray pattern as the to ⁇ least one other injector.
  • the invention is tert erläu ⁇ tert. It show in
  • FIG. 1 shows a fluid injection device according to the invention
  • FIG. 2, 2a shows a section through the fluid injection device according to FIG. 1;
  • 1 shows an exhaust gas treatment unit in a motor vehicle having a conduit portion 1 a thereof stream ⁇ arranged downstream evaporator means 2, of a catalyst is subsequently assigned.
  • 3 The line section 1 is substantially tubular.
  • Two symmetrically arranged on its circumference formations 4 serve to receive one injection device 5, via which a urea solution is injected into a flowing in the direction of the arrow exhaust stream.
  • the urea solution is the injection devices 5 via leads 6 of a non-illustrated
  • Feed unit supplied from an additive container From the deformations ⁇ 4 are adapted to the exhaust stream and the supply of the urea solution in terms of quantity and direction.
  • the line section 1 consists of two line elements 7, 7 which are interconnected.
  • Figure 2 shows a section through the line section 1 with the formations 4.
  • the injection devices are not shown, only the sprayed beams 8, 8 ⁇ are shown.
  • the injection devices 5 are so as commercial ⁇ det, that a beam 8 as a core beam and a beam 8 ⁇ is formed as the core jet surrounding the cladding beam.
  • both beams 8, 8 ⁇ formed so that CKEN abde- in the sum of the entire cross section of the pipe section 1, whereby an optimal supply of the urea solution takes place in the exhaust stream.
  • the pipe section 1 in Figure 3 consists of three line ⁇ elements 7, 7 7, ⁇ , each with an injector 5.
  • the line elements 7, 7 7, ⁇ are formed so that the injectors 5 symmetrically distributed on the circumference of the line portion.
  • the injection devices 5 are formed with respect to the jet injection into the line section so that each beam 8, 8 8 , ⁇ in approximately has an elliptical cross-section. Except for a central area 9 ⁇ eral the beams 8, 8 8 cover, ⁇ from the entire cross section of the line portion. 1
  • the central area 9, which is not covered with respect to the direct injection, is not critical, since the exhaust gas flow distributes the beams 8, 8, 8 , ⁇ , so that the urea solution spreads over the entire cross section and thus also into the central area 9 distributed.
  • the line section 1 is composed of two line elements 7, 7 ⁇ , wherein in each line element 7, 7 ⁇ each two injection devices 5 are arranged.
  • the fluid injection system in figure 5 has two injectors 5 in the pipe section 1, these being arranged in Strö ⁇ flow direction one behind the other and in the circumferential direction at the same height.
  • the distance of the injectors 5 in the flow direction is 1.5 times the diameter of the line section. 1
  • the injectors 5 are also arranged in the flow direction one behind the other. At the same time, the injectors 5 are arranged in the circumferential direction at a distance of 180 °. The distance of the Einspritzvor ⁇ directions 5 in the flow direction is 0.5 times the diameter of the line section. 1

Landscapes

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

Abstract

The invention relates to a fluid injection system comprising a pipe section (1) in which an injection device (5) is arranged, and comprising an evaporator device which is arranged downstream of the injection device and with which a downstream catalytic converter (3) is associated; in said catalytic converter (3), a fluid injected by the injection device (5) undergoes a catalytic reaction with the exhaust gas. At least one additional injection device (5) is arranged in the pipe section (1).

Description

Beschreibung description
Fluideinsprit zSystem Fluid injection system
Gegenstand der Erfindung ist ein Fluideinspritzsystem mit einem Leitungsabschnitt, in dem eine Einspritzvorrichtung angeordnet ist, einer davon stromabwärts angeordneten Verdampfereinrichtung der nachfolgend ein Katalysator zugeordnet ist, in dem ein von der Einspritzvorrichtung eingespritztes Fluid mit dem Abgas eine katalytische Reaktion eingeht. The invention relates to a fluid injection system with a line section in which an injection device is arranged, one of which downstream evaporator is associated with the below a catalyst in which a injected from the injector fluid with the exhaust gas enters into a catalytic reaction.
Es ist bekannt, zur Abgasnachbehandlung in das Abgas ein Additiv einzuspritzen, um unerwünschte Bestandteile des Abgases zu minimieren oder umzuwandeln. Hierzu ist ein stromaufwärts einer Verdampfereinrichtung angeordneter Leitungsabschnitt mit einer Einspritzvorrichtung versehen, über die das Additiv in den Abgasstrom eingespritzt wird. Der Wirkungsgrad der Ab¬ gasnachbehandlung wird dabei unter anderem von der Art der Einspritzung des Additivs in den Abgasstrom bestimmt. Um eine gute Vermischung des eingespritzten Additivs mit dem Abgas zu erreichen, wird das additiv in einem Winkel zur Längsachse des Leitungsabschnitts eingespritzt. Eine gute Vermischung des Additivs mit dem Abgasstrom ist erforderlich, um eine gute Tropfenverteilung an der Verdampfereinrichtung zu erreichen. Dennoch hat sich gezeigt, dass es zu einer inhomogenen Tropfenverteilung an der Verdampfereinrichtung kommt. Infolge der inhomogenen Tropfenverteilung ergeben sich örtlich Kühlungen in der Verdampfereinrichtung, was die Ausbildung von Ablagerungen in der Verdampfereinrichtung fördert. Dies führt zu einer verminderten Verdampferleistung des Additivs und somit zu einer verschlechterten Abgasnachbehandlung. It is known to inject an additive for exhaust aftertreatment into the exhaust gas in order to minimize or convert undesirable components of the exhaust gas. For this purpose, a line section arranged upstream of an evaporator device is provided with an injection device, via which the additive is injected into the exhaust gas flow. The efficiency of ¬ From gas aftertreatment is determined among other things, on the type of injection of additive into the exhaust stream. In order to achieve a good mixing of the injected additive with the exhaust gas, the additive is injected at an angle to the longitudinal axis of the line section. Good mixing of the additive with the exhaust stream is required to achieve good droplet distribution at the evaporator device. Nevertheless, it has been shown that there is an inhomogeneous droplet distribution at the evaporator device. As a result of the inhomogeneous droplet distribution, localized cooling results in the evaporator device, which promotes the formation of deposits in the evaporator device. This leads to a reduced evaporator performance of the additive and thus to a deteriorated exhaust aftertreatment.
Aufgabe der vorliegenden Erfindung ist es daher, ein Fluideinspritzsystem zu schaffen, welches zu einer möglichst homogenen Tropfenverteilung bezogen auf den Leitungsguerschnitt an der Verdampfereinrichtung führt. Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass in ei¬ nem Leitungsabschnitt zumindest eine weitere Einspritzvor¬ richtung angeordnet ist . Die Anordnung zumindest einer weiteren Einspritzvorrichtung ermöglicht die Erzeugung einer verbesserten Tropfenverteilung des eingespritzten Additivs über den gesamten Querschnitt des Leitungsabschnitts, da jeder Einspritzvorrichtung nur noch für einen Sektor des Querschnitts eine gleichmäßige Tropfen- Verteilung erzeugen muss. Durch die gleichmäßige Tropfenverteilung in den einzelnen Sektoren durch die jeweiligen Einspritzvorrichtungen, ergibt sich einer homogene Tropfenverteilung über den gesamten Leitungsguerschnitt . In einer vorteilhaften Ausgestaltung wird bereits eine sehr gute homogene Tropfenverteilung über den Leitungsguerschnitt dadurch erreicht, dass zwei Einspritzvorrichtungen im Leitungsabschnitt angeordnet sind. Je nach Größe der Abgasnachbehandlungseinheit und der damit vorgegebenen Leitungsguerschnitte hat es sich als vorteilhaft erwiesen, maximal vier Einspritzvorrichtungen in dem Leitungsabschnitt anzuordnen. Die Ausbildung einer homogenen Tropfenverteilung über den gesamten Querschnitt, wird gemäß einer weiteren vorteilhaften Ausgestaltung dadurch erreicht, dass die Einspritzvorrichtungen symmetrisch am Umfang des Leitungsabschnitts angeordnet sind . Object of the present invention is therefore to provide a fluid injection system, which leads to a very homogeneous droplet distribution based on the Leitungsguerschnitt on the evaporator device. According to the invention the object is achieved in that at least one further Einspritzvor ¬ direction is arranged in egg ¬ nem line section. The arrangement of at least one further injection device makes it possible to produce an improved droplet distribution of the injected additive over the entire cross section of the line section, since each injection device only has to produce a uniform droplet distribution for one sector of the cross section. Due to the uniform droplet distribution in the individual sectors through the respective injection devices, a homogeneous droplet distribution results over the entire line cross section. In an advantageous embodiment, a very good homogeneous droplet distribution over the line cross-section is already achieved in that two injection devices are arranged in the line section. Depending on the size of the exhaust gas aftertreatment unit and the line cir- cuits that are specified, it has proved to be advantageous to arrange a maximum of four injection devices in the line section. The formation of a homogeneous droplet distribution over the entire cross section, is achieved according to a further advantageous embodiment in that the injection devices are arranged symmetrically on the circumference of the line section.
Für die Ausbildung einer homogenen Tropfenverteilung ist es erforderlich, dass das die Einspritzvorrichtungen zueinander ausgerichtet sind. Eine fehlerfreie Ausrichtung der Ein¬ spritzvorrichtungen zueinander wird in einer weiteren Ausges- taltung dadurch erreicht, dass der Leitungsabschnitt aus meh¬ reren Leitungselementen besteht, wobei in jedem Leitungselement eine Einspritzvorrichtung angeordnet ist. Diese Ausges- taltung ermöglicht die separate Befestigung und Ausrichtung jeder einzelnen Einspritzvorrichtung an dem ihr zugeordneten Leitungselement. Der fertige Leitungsabschnitt wird anschlie¬ ßend durch die Montage der einzelnen Leitungselemente er¬ zeugt . For the formation of a homogeneous droplet distribution, it is necessary that the injection devices are aligned with each other. A faultless alignment of A ¬ spray means to one another is taltung in a further Ausges- achieved in that the line section of MEH ¬ reren line elements, wherein an injector is arranged in each line element. These Ausges- taltung allows the separate attachment and alignment of each injector to its associated line element. The finished pipe section is subsequently he witnesses ¬ ßend ¬ by the assembly of the individual line elements.
In einer weiteren Ausgestaltung sind die Einspritzvorrichtungen in Strömungsrichtung auf gleicher Höhe angeordnet . Das hat den Vorteil, dass die Leitungselemente, aus denen sich der Leitungsabschnitt zusammensetzt, gleich aufgebaut sind. In a further embodiment, the injection devices are arranged in the flow direction at the same height. This has the advantage that the line elements, which make up the line section are the same structure.
In Abhängigkeit von den Strömungsbedingungen des Abgases und/oder der Gestaltung des Leitungsabschnitts kann es vorkommen, dass eine homogene Tropfenverteilung durch das Zusammenführen der Sprühbilder der einzelnen Einspritzvorrichtungen nicht erreicht wird. In diesen Fällen lässt sich gemäß einer anderen vorteilhaften Ausgestaltung eine homogene Tropfenverteilung über den Leitungsquerschnitt dadurch erreichen, dass zumindest eine Einspritzvorrichtung stromabwärts zumin¬ dest einer weiteren Einspritzvorrichtung angeordnet ist. Auch bei dieser Ausgestaltung können die in Strömungsrichtung versetzt angeordneten Einspritzvorrichtungen symmetrisch am Umfang des Leitungsabschnitts verteilt angeordnet sein. Depending on the flow conditions of the exhaust gas and / or the design of the line section, it may happen that a homogeneous droplet distribution is not achieved by merging the spray patterns of the individual injection devices. In these cases, a homogeneous droplet distribution across the wire cross-section can be achieved in that at least one injection device disposed downstream of at least one further ¬ injection device according to another advantageous embodiment. Also in this embodiment, the offset in the flow direction injectors can be arranged symmetrically distributed on the circumference of the line section.
Eine in Strömungsrichtung versetzte Anordnung der Einspritzvorrichtungen ist auch dann von Vorteil, wenn der den Leitungsabschnitt umgebene Bauraum derart begrenzt ist, dass die Anordnung der Einspritzvorrichtungen auf gleicher Höhe, bezogen auf die Strömungsrichtung, nicht möglich ist . Der vorhandene Bauraum lässt dabei besonders effektiv nutzen, wenn die Einspritzvorrichtungen unsymmetrisch, beispielsweise in einem Abstand von 90° am Umfang des Leitungsabschnitts verteilt, angeordnet sind. An offset in the flow direction arrangement of the injectors is also advantageous if the space surrounding the line section space is limited such that the arrangement of the injectors at the same level, based on the flow direction, is not possible. The available space can be used particularly effectively when the injectors are arranged asymmetrically, for example, distributed at a distance of 90 ° to the circumference of the line section.
Hierbei hat es sich als vorteilhaft erwiesen, wenn der Ab¬ stand der Einspritzvorrichtungen in Strömungsrichtung zwischen dem 0,1- bis 1,5-fachem des Durchmessers des Leitungs- abschnitts, vorzugsweise dem 0,2- bis 1,0-fachem des Durch¬ messers des Leitungsabschnitts und insbesondere dem 0,4- bis 0,8-fachem des Durchmessers des Leitungsabschnitts beträgt. In einer besonders einfachen vorteilhaften Ausgestaltung sind die Einspritzvorrichtungen im gleichen Winkel zur Längsachse des Leitungsabschnitts angeordnet. This has proved to be advantageous if the From ¬ stand of the injectors in the direction of flow between 0.1 to 1.5 times the diameter of the conduction portion preferably 0.2- to 1.0-fold of the weight, through ¬ diameter of the pipe section and in particular from 0.4 to 0.8-fold the diameter of the pipe section. In a particularly simple advantageous embodiment, the injection devices are arranged at the same angle to the longitudinal axis of the line section.
Ein besonders einfaches Anpassen der einzelnen Sprühbilder der Einspritzvorrichtungen zur Erreichung einer homogenenA particularly simple adaptation of the individual spray patterns of the injection devices to achieve a homogeneous
Tropfenverteilung wird dadurch erreicht, dass zumindest einer Einspritzvorrichtung in einem anderen Winkel zur Längsachse des Leitungsabschnitts als eine andere Einspritzvorrichtung angeordnet ist. Drop distribution is achieved in that at least one injection device is arranged at a different angle to the longitudinal axis of the line section than another injection device.
In einer anderen vorteilhaften Ausgestaltung lässt sich eine homogene Tropfenverteilung dadurch erreichen, dass zumindest eine Einspritzvorrichtung ein anderes Sprühbild als die zu¬ mindest einer andere Einspritzvorrichtung erzeugt. In another advantageous embodiment, a homogeneous droplet distribution can be achieved in that at least one injection device produces a different spray pattern as the to ¬ least one other injector.
Durch diese Ausgestaltungen lässt sich einer homogenen Tropfenverteilung im Leitungsguerschnitt für unterschiedlichste Leitungen und Strömungsbedingungen des Abgases erreichen. An einem Ausführungsbeispiel wird die Erfindung näher erläu¬ tert. Es zeigen in These refinements make it possible to achieve a homogeneous droplet distribution in the line cross section for a wide variety of lines and flow conditions of the exhaust gas. In one embodiment, the invention is tert erläu ¬ tert. It show in
Figur 1 eine erfindungsgemäße Fluideinspritzvorrich- tung; FIG. 1 shows a fluid injection device according to the invention;
Figur 2, 2a einen Schnitt durch die Fluideinspritzvorrich- tung nach Fig. 1; weitere Anordnungen der Einspritzvorrichtun gen . Figur 1 zeigt eine Abgasnachbehandlungseinheit in einem Kraftfahrzeug mit einem Leitungsabschnitt 1 eine davon strom¬ abwärts angeordneten Verdampfereinrichtung 2, der nachfolgend ein Katalysator 3 zugeordnet ist. Der Leitungsabschnitt 1 ist im Wesentlichen rohrförmig ausgebildet . Zwei an seinem Umfang symmetrisch angeordnete Ausformungen 4 dienen zur Aufnahme je einer Einspritzvorrichtung 5, über die eine Harnstofflösung in einen in Pfeilrichtung strömenden Abgasstrom eingespritzt wird. Hierzu wird die Harnstofflösung den Einspritzvorrich- tungen 5 über Zuleitungen 6 von einer nicht dargestelltenFIG. 2, 2a shows a section through the fluid injection device according to FIG. 1; Other arrangements of Einspritzvorrichtun conditions. 1 shows an exhaust gas treatment unit in a motor vehicle having a conduit portion 1 a thereof stream ¬ arranged downstream evaporator means 2, of a catalyst is subsequently assigned. 3 The line section 1 is substantially tubular. Two symmetrically arranged on its circumference formations 4 serve to receive one injection device 5, via which a urea solution is injected into a flowing in the direction of the arrow exhaust stream. For this purpose, the urea solution is the injection devices 5 via leads 6 of a non-illustrated
Fördereinheit aus einem Additivbehälter zugeführt. Die Aus¬ formungen 4 sind an den Abgasstrom und die Zufuhr der Harnstofflösung hinsichtlich Menge und Richtung angepasst. Der Leitungsabschnitt 1 besteht aus zwei Leitungselementen 7, 7 die miteinander verbunden sind. Feed unit supplied from an additive container. From the deformations ¬ 4 are adapted to the exhaust stream and the supply of the urea solution in terms of quantity and direction. The line section 1 consists of two line elements 7, 7 which are interconnected.
Figur 2 zeigt einen Schnitt durch den Leitungsabschnitt 1 mit den Ausformungen 4. Die Einspritzvorrichtungen sind nicht dargestellt, lediglich die eingesprühten Strahlen 8, 8λ sind gezeigt. Die Einspritzvorrichtungen 5 sind dabei so ausgebil¬ det, dass ein Strahl 8 als Kernstrahl und ein Strahl 8λ als den Kernstrahl umgebenden Mantelstrahl ausgebildet ist. Damit sind beide Strahlen 8, 8 λ so ausgebildet, dass sich in der Summe den gesamten Querschnitt des Leitungsabschnitts 1 abde- cken, wodurch eine optimale Zuführung der Harnstofflösung in den Abgasstrom erfolgt. Die Vorrichtung nach Figur 2a unterscheidet sich lediglich dadurch, dass beide Strahlen 8, 8 λ in unterschiedlichen Winkeln von ß=15° und a=20° zur Längsachse des Leitungsabschnitts 1 eingespritzt werden. Figure 2 shows a section through the line section 1 with the formations 4. The injection devices are not shown, only the sprayed beams 8, 8 λ are shown. The injection devices 5 are so ausgebil ¬ det, that a beam 8 as a core beam and a beam 8 λ is formed as the core jet surrounding the cladding beam. This means that both beams 8, 8 λ formed so that CKEN abde- in the sum of the entire cross section of the pipe section 1, whereby an optimal supply of the urea solution takes place in the exhaust stream. The device according to FIG. 2 a differs only in that both beams 8, 8 λ are injected at different angles of β = 15 ° and a = 20 ° relative to the longitudinal axis of the line section 1.
Der Leitungsabschnitt 1 in Figur 3 besteht aus drei Leitungs¬ elementen 7, 7 7, λ, mit je einer Einspritzvorrichtung 5. Die Leitungselemente 7, 7 7, λ sind so ausgebildet, dass sich die Einspritzvorrichtungen 5 symmetrisch am Umfang des Leitungsabschnitts 1 verteilen. Die Einspritzvorrichtungen 5 sind hinsichtlich der Strahleindüsung in den Leitungsabschnitt so ausgebildet, dass jeder Strahl 8, 8 8, λ in etwa einen elliptischen Querschnitt aufweist. Bis auf einen zent¬ ralen Bereich 9 decken die Strahlen 8, 8 8, λ den gesamten Querschnitt des Leitungsabschnitts 1 ab. Der bezogen auf die direkte Eindüsung nicht abgedeckte zentrale Bereich 9 ist da- bei unkritisch, da durch den Abgasstrom eine Verteilung der Strahlen 8, 8 8, λ erfolgt, so dass sich die Harnstofflösung über den gesamten Querschnitt und damit auch in den zentralen Bereich 9 verteilt . The pipe section 1 in Figure 3 consists of three line ¬ elements 7, 7 7, λ, each with an injector 5. The line elements 7, 7 7, λ are formed so that the injectors 5 symmetrically distributed on the circumference of the line portion. 1 The injection devices 5 are formed with respect to the jet injection into the line section so that each beam 8, 8 8 , λ in approximately has an elliptical cross-section. Except for a central area 9 ¬ eral the beams 8, 8 8 cover, λ from the entire cross section of the line portion. 1 The central area 9, which is not covered with respect to the direct injection, is not critical, since the exhaust gas flow distributes the beams 8, 8, 8 , λ , so that the urea solution spreads over the entire cross section and thus also into the central area 9 distributed.
Eine Anordnung von vier Einspritzvorrichtungen 5 ist in Figur 4 dargestellt. Der Leitungsabschnitt 1 setzt sich aus zwei Leitungselementen 7, 7λ zusammen, wobei in jedem Leitungselement 7, 7λ jeweils zwei Einspritzvorrichtungen 5 angeordnet sind . An arrangement of four injectors 5 is shown in FIG. The line section 1 is composed of two line elements 7, 7 λ , wherein in each line element 7, 7 λ each two injection devices 5 are arranged.
Das Fluideinspritzsystem in Figur 5 besitzt zwei Einspritzvorrichtungen 5 im Leitungsabschnitt 1, wobei diese in Strö¬ mungsrichtung hintereinander und in Umfangrichtung auf gleicher Höhe angeordnet sind. Der Abstand der Einspritzvorrichtungen 5 in Strömungsrichtung beträgt das 1,5-fache des Durchmessers des Leitungsabschnitts 1. The fluid injection system in figure 5 has two injectors 5 in the pipe section 1, these being arranged in Strö ¬ flow direction one behind the other and in the circumferential direction at the same height. The distance of the injectors 5 in the flow direction is 1.5 times the diameter of the line section. 1
In Figur 6 sind die Einspritzvorrichtungen 5 ebenfalls in Strömungsrichtung hintereinander angeordnet . Gleichzeitig sind die Einspritzvorrichtungen 5 in Umfangrichtung mit einem Abstand von 180° angeordnet. Der Abstand der Einspritzvor¬ richtungen 5 in Strömungsrichtung beträgt das 0,5-fache des Durchmessers des Leitungsabschnitts 1. In Figure 6, the injectors 5 are also arranged in the flow direction one behind the other. At the same time, the injectors 5 are arranged in the circumferential direction at a distance of 180 °. The distance of the Einspritzvor ¬ directions 5 in the flow direction is 0.5 times the diameter of the line section. 1

Claims

Patentansprüche claims
Fluideinspritzsystem mit einem Leitungsabschnitt, in dem eine Einspritzvorrichtung angeordnet ist, einer davon stromabwärts angeordneten Verdampfereinrichtung, der nachfolgend ein Katalysator zugeordnet ist, in dem ein von der Einspritzvorrichtung eingespritztes Fluid mit dem Abgas eine katalytische Reaktion eingeht, d a ¬ d u r c h g e k e n n z e i c h n e t , dass in dem Lei¬ tungsabschnitt (1) zumindest eine weitere Einspritzvor¬ richtung (5) angeordnet ist. A fluid injection system with a line section, in which an injection device is arranged, one of which downstream evaporator, which is assigned downstream of a catalyst in which a injected from the injector fluid with the exhaust gas enters into a catalytic reaction, ¬ characterized in that in the Lei ¬ section (1) at least one further Einspritzvor ¬ direction (5) is arranged.
Fluideinspritzsystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass maximal vier Einsprit Vorrichtungen (5) in dem Leitungsabschnitt (1) angeord net sind. The fluid injection system according to claim 1, wherein a maximum of four injection devices (5) are arranged in the line section (1).
Fluideinspritzsystem nach Anspruch 2, dadurch gekenn zeichnet, dass die Einspritzvorrichtungen (5) symmet¬ risch am Umfang des Leitungsabschnitts (1) angeordnet sind . Fluid injection system according to claim 2, characterized in that the injectors (5) symmet ¬ driven at the circumference of the conduit section (1) are arranged.
Fluideinspritzsystem nach zumindest einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass der Leitungsabschnitt (1) aus mehreren Leitungselementen (7, 7 7, λ) besteht, wobei in jedem Leitungselement (7, 7 7, λ) eine Einspritzvorrichtung (5) angeordnet ist. Fluid injection system according to at least one of the preceding claims, characterized in that the conduit section (1) of a plurality of line elements (7, 7 7, λ), wherein in each pipe element (7, 7 7, λ) is arranged an injector (5).
Fluideinspritzsystem nach zumindest einem der vorherge henden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die Einspritzvorrichtungen (5) in Strömungsrichtung auf gleicher Höhe angeordnet sind. The fluid injection system according to at least one of the preceding claims, characterized in that the injection devices (5) are arranged in the flow direction at the same height.
Fluideinspritzsystem nach zumindest einem der vorherge henden Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass zumindest eine Einspritzvorrich- tung (5) stromabwärts zumindest einer weiteren Ein- sprit zvorrichtung (5) angeordnet ist. Fluid injection system according to at least one of the preceding claims 1 to 4, characterized in that at least one injection device tion (5) downstream of at least one further injection device (5).
Fluideinspritzsystem nach Anspruch 6, d a du r c h g e k e n n z e i c h n e t , dass Abstand der Einspritz¬ vorrichtungen (5) in Strömungsrichtung zwischen dem 0,1- bis 1,5-fachem des Durchmessers des Leitungsabschnitts (1), vorzugsweise dem 0,2- bis 1,0-fachem des Durchmes¬ sers des Leitungsabschnitts (1) und insbesondere dem 0,4- bis 0,8-fachem des Durchmessers des Leitungsab¬ schnitts (1) beträgt. Fluid injection system of claim 6, since you rchgekennzeichnet that distance the injection ¬ devices (5) to 1.5 times the diameter of the line portion in the direction of flow between 0.1 (1), preferably from 0.2 to 1.0 is -fold of diam ¬ sers of the line section (1) and in particular from 0.4 to 0.8-fold the diameter of the Leitungsab ¬ section (1).
Fluideinspritzsystem nach zumindest einem der vorhergehenden Ansprüche, d a du r c h g e k e n n z e i c h n e t , dass die Einspritzvorrichtungen (5) im gleichen Winkel zur Längsachse des Leitungsabschnitts (1) ange¬ ordnet sind. Fluid injection system according to at least one of the preceding claims, since you rchgekennzeichnet that the injection devices (5) are arranged at the same angle to the longitudinal axis of the line section (1) ¬ .
Fluideinspritzsystem nach zumindest einem der vorhergehenden Ansprüche 1 bis 7, d a du r c h g e k e n n z e i c h n e t , dass zumindest eine Einspritzvorrich¬ tung (5) in einem anderen Winkel zur Längsachse des Lei¬ tungsabschnitts (1) als eine andere Einspritzvorrichtung (5) angeordnet ist. Fluid injection system according to at least one of the preceding claims 1 to 7, since you rchgekennzeichnet that at least one Einspritzvorrich ¬ device (5) at a different angle to the longitudinal axis of the Lei ¬ processing section (1) as another injection device (5) is arranged.
Fluideinspritzsystem nach zumindest einem der vorhergehenden Ansprüche, d a du r c h g e k e n n z e i c h n e t , dass zumindest eine Einspritzvorrichtung (5) ein anderes Sprühbild als die zumindest einer andere Einspritzvorrichtung (5) erzeugt. Fluid injection system according to at least one of the preceding claims, characterized in that at least one injection device (5) generates a different spray pattern than the at least one other injection device (5).
EP16787902.2A 2015-10-30 2016-10-28 Fluid injection system Withdrawn EP3368753A1 (en)

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Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4132858B2 (en) * 2002-02-13 2008-08-13 株式会社小松製作所 Exhaust gas purification device
JP4706631B2 (en) * 2006-12-20 2011-06-22 株式会社デンソー Exhaust purification device
JP4708402B2 (en) * 2007-09-21 2011-06-22 トヨタ自動車株式会社 Exhaust gas purification device for internal combustion engine
US8079211B2 (en) * 2008-11-06 2011-12-20 Ford Global Technologies, Llc Bypass purge for protecting against formation of reductant deposits
WO2010056793A1 (en) * 2008-11-13 2010-05-20 Donaldson Company, Inc. Injector mounting configuration for an exhaust treatment system
US8114364B2 (en) * 2009-02-02 2012-02-14 Cummins Filtration Ip, Inc. Increased reductant decomposition reactor robustness through the use of a hydrolytic catalyst coating
US20110099974A1 (en) * 2009-11-03 2011-05-05 International Engine Intellectual Property Company Llc Reductant spray injector boss
US20110131958A1 (en) * 2009-12-04 2011-06-09 International Engine Intellectual Property Company, Llc System and method for mitigating potential for formation of urea deposits in an engine exhaust system during cold ambient conditions
US8621846B2 (en) * 2010-03-02 2014-01-07 GM Global Technology Operations LLC Gas/liquid mixing device for diesel exhaust aftertreatment
US8240135B2 (en) * 2010-05-07 2012-08-14 Ford Global Technologies, Llc Exhaust system mixing device
DE102010039521A1 (en) * 2010-08-19 2012-02-23 Robert Bosch Gmbh Exhaust gas purification device has exhaust pipe and bringing unit assigned to exhaust pipe, by which fluid is brought in exhaust pipe for purifying exhaust gas
DE102010056314A1 (en) * 2010-12-27 2012-06-28 Friedrich Boysen Gmbh & Co. Kg Device for distributing fluids in exhaust systems
US8635858B2 (en) * 2011-10-25 2014-01-28 Ford Global Technologies, Llc Fluid-spray atomizer
US20150004083A1 (en) * 2012-01-26 2015-01-01 International Engine Intellectual Property Company, Llc Injector boss and system and method of injecting liquid into a gas stream
US20140166141A1 (en) * 2012-12-13 2014-06-19 Tenneco Automotive Operating Company Inc. Reductant Injection System with Control Valve
US9869226B2 (en) * 2013-06-07 2018-01-16 Peerless Mfg. Co. System and method for sequential injection of reagent to reduce NOx from combustion sources
US20150076811A1 (en) * 2013-08-26 2015-03-19 Nelson Global Products, Inc. Thin Foil Encapsulated Assemblies
US9192892B2 (en) * 2014-01-16 2015-11-24 Cummins Emission Solutions, Inc. Selective dosing module control system
US9624805B2 (en) * 2014-08-26 2017-04-18 Caterpillar Inc. Aftertreatment system having dynamic independent injector control
US10473013B2 (en) * 2014-09-26 2019-11-12 Cummins Emission Solutions, Inc. Integrative reductant system and method using constant volume injection
US9512763B2 (en) * 2014-12-05 2016-12-06 Caterpillar Inc. Diesel exhaust fluid dosing system for diesel engine aftertreatment module
US20150192046A1 (en) * 2015-03-18 2015-07-09 Perkins Engines Company Injector unit for after-treatment system
US20160312679A1 (en) * 2015-04-23 2016-10-27 Nelson Global Products, Inc. Engine Exhaust System Decomposition Tube
DE102015009089B4 (en) * 2015-04-30 2022-04-14 Mehldau & Steinfath Umwelttechnik Gmbh Process, device and use of the device for the denitrification of exhaust gases from industrial plants

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US20180306081A1 (en) 2018-10-25

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