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WO2018117994A1 - Tuyau multi-collecteur - Google Patents

Tuyau multi-collecteur Download PDF

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Publication number
WO2018117994A1
WO2018117994A1 PCT/TR2017/050689 TR2017050689W WO2018117994A1 WO 2018117994 A1 WO2018117994 A1 WO 2018117994A1 TR 2017050689 W TR2017050689 W TR 2017050689W WO 2018117994 A1 WO2018117994 A1 WO 2018117994A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow conduit
exhaust gas
exhaust
pipe
injector
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.)
Ceased
Application number
PCT/TR2017/050689
Other languages
English (en)
Inventor
Burak BAYRAK
Ismail Hakkı SAVCI
Hakan ALKAN
Hakan ÇAYBAŞI
Aydın AYYILDIZ
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.)
Ford Otomotiv Sanayi AS
Original Assignee
Ford Otomotiv Sanayi AS
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 Ford Otomotiv Sanayi AS filed Critical Ford Otomotiv Sanayi AS
Publication of WO2018117994A1 publication Critical patent/WO2018117994A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • 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
    • 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
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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 present invention relates to a multi-manifold pipe, which prevents the formation of deposits that may result after the injection of a reductant mixture in the exhaust systems using the technics of active selective catalytic reduction-SCR.
  • the exhaust gas coming from the engine is not conveyed through straight pipes.
  • the parts and pipes used in exhaust system are arranged in places, which are suitable for the vehicle body design.
  • Design of pipes of the exhaust system are made according to body design and to other parts and also according to the position of pipes and of equipments like injector, which are attached to the pipes. For that reason, there are returns, decreases and increases in diameters of the pipes in the exhaust systems. Changes to the pipes of the exhaust system directly affect the gas flow and the homogeneity of the exhaust gas.
  • the system used to reduce NOx emissions below regulatory limits is generally referred to as the active SCR system.
  • an urea-water solution is used for the regulation of the NOx emissions, which is referred to as "Ad blue".
  • the urea-water solution is sprayed in liquid form by means of an injector into the mixing zone. This urea-water mixture evaporates in high temperatures in the exhaust line and enters reaction, then is converted into ammonia (NH3).
  • NH3 ammonia
  • SCR catalyst catalyst
  • ammonia reacts with NOx, reducing the NOx emissions to the desired level.
  • the Ad blue mixture coming out from the injector is striking the pipeline walls in low engine loads due to low exhaust flows and low temperature.
  • the solution hitting the wall draws heat from the wall in order to evaporate and so decreases in temperatures of the wall are observed.
  • the injected ad blue starts to solidify in the low temperature zone formed on the wall, instead of evaporating. Since the solution does not evaporate, the target value for NOx emission cannot be achieved. Due to the solidification of the solution, an increase in the target pressure drop value in the exhaust pipe is observed. Furthermore, the solidified parts damage the catalysts in the exhaust line.
  • United States patent document US20120263632 which is in the state of the art, discloses a system developed for use in exhaust systems. There is a doser in this system. In this system, the doser transfers the UWS (Urea-Water Solution) required for the final process to the exhaust aftertreatment system. It is described, that materials like urea etc. In the system cause the problem of solidification on the walls. In order to avoid this problem, the exhaust gas is guided to the aftertreatment system from more than one point with a certain angle. As a result, the exhaust gas mixes with UWS in areas that are remote from the walls. The invention makes it possible to avoid the problem of accumulation of liquid particles in the doser as well as in the exhaust pipe.
  • UWS Ultra-Water Solution
  • the exhaust gas is divided into three different lines.
  • the first one of these lines is a flow conduit, the other two are the separating lines positioned symmetrically to each other. Thanks to these separating lines it is possible to obtain a more stable mixture in the mixing zone.
  • the object of the present invention is to provide a multi-manifold pipe which transfers the exhaust gas from the exhaust gas pipe to the conventional pipe system via a plurality of channels.
  • Another object of the present invention is to provide a multi- manifold pipe which allows the flow direction of the reductant liquid sprayed from the injector to be changed.
  • Yet another object of the present invention is to realize a multi-manifold pipe in which the flow of the exhaust gas is changed by increasing in areas, where the risk of accumulation is higher, thereby preventing the liquid from hitting the wall and causing the accumulation to occur.
  • a further object of the present invention is to provide a multi-manifold pipe in which the amount of flow to each line can be adjusted.
  • a multi-manifold pipe provided to achieve the object of the present invention and disclosed in the first claim and other depended claims comprises a flow conduit positioned between an inlet port and an outlet port and further comprises two separator lines.
  • a part of the exhaust gas coming out of the exhaust pipe is distributed to the flow conduit and another part to the separator lines.
  • the separator lines are arranged around the injector, which is positioned on the elbow outside the flow conduit. Separator lines guide the exhaust gas they carry in an angular direction to the flow conduit.
  • the ducts of the separator lines are connected to the contact surface of the flow conduit. Thus, the exhaust gas carried by the separator lines is directed angularly to the flow conduit.
  • the exhaust gas entering the flow conduit from the separator lines prevents the reducing liquid sprayed by the injector from contacting the inner walls.
  • the exhaust gas and the reducing liquid enter the reaction in the mixing zone within the flow conduit and so the emission levels in the exhaust gas are reduced.
  • Exhaust gas with reduced emissions is directed to be transferred from the exhaust output to the outside atmosphere.
  • Figure 1 is a perspective view of the multi- manifold pipe from an angle of view.
  • Figure 2 is a perspective view of the multi- manifold pipe from another angle of view.
  • Figure 3 is a perspective view of the multi- manifold pipe from yet another angle of view.
  • Figure 4 is a perspective view of the multi- manifold pipe from a further angle of view.
  • Figure 5 is front view of the multi- manifold pipe.
  • Figure 6 is the rear view of the multi- manifold pipe from an angle of view.
  • Figure 7 is the rear view of the multi- manifold pipe from yet another angle of view.
  • Figure 8 is a cross-sectional view of the multi- manifold pipe from an angle of view.
  • a multi- manifold pipe (1) in its most basic form, which prevents the potential formation of deposits after the injection of a reductant mixture, comprises,
  • -at least one injector (4) which ensures that the reductant reducing the emission values of exhaust gas can reach the preferred zone, -at least one flow conduit (5) carrying a part of the exhaust gas coming from the exhaust pipe (E) and in which the entire exhaust gas conducted from the exhaust pipe (E) is also mixed with the reductant coming from the injector (4),
  • an injector (4) is provided.
  • the injector (4) injects the emission reducing mixture into the mixing zone (52) contained in the multi- manifold pipe (1) by atomizing it.
  • Injector (4) sprays the reductant mixture towards the flow conduit (5).
  • the injector (4) is positioned preferably onto the flow conduit (5).
  • the injector (4) comprises three spraying holes.
  • the spraying holes spray the reductant liquid in such a way that it will preferably form a conical geometry. In this way the reductant sprayed from the injector (4) forms a conical line and proceeds on this line.
  • the spray holes of the injector (4) are located below the axis of rotation (63) of the separator lines (6).
  • a flow conduit (5) is provided.
  • the flow conduit (5) is a line, through which the exhaust gas coming from the exhaust pipe (E) is conveyed and which is exposed to a reductant.
  • Flow conduit (5) can be of elbow- shape or a flat pipe.
  • the flow conduit (5) is a pipe of elbow-shape.
  • the injector (4) On the flow conduit (5), there is located the injector (4), which injects reductant to the exhaust gas passing through the flow conduit (5).
  • the injector (4) is arranged on the elbow part of the flow conduit (5).
  • the contact surface (51) forms the outer section of the flow conduit (5).
  • the conducting channels (62) of separator lines (6) are connected to the flow conduit (5) via contact surface (51).
  • the conducting channels (62) are connected to the contact surface (51) in an angularly manner. Reductant injected from the injector (4) and exhaust gas coming with exhaust pipe through the separator lines (6) are mixed in the mixing zone (52) located in the flow conduit (5) and conveyed to be transferred to outer atmosphere through the outlet opening (3). At one end of the flow conduit (5), the outlet opening (3) is arranged.
  • separator line (6) there are more than one separator line (6) located symmetrically to the central axis of the mixing zone (52) of flow conduit (5).
  • two separator lines (6) are arranged.
  • more than one separator line (6) may be arranged.
  • the separator lines (6) are the external lines, through which the exhaust gas coming from inlet opening (2) is conveyed.
  • Separator lines (6) are located in the area around the injection field of the injector (4).
  • the separator lines (6) in this embodiment of the invention are identical and positioned symmetrically with respect to each other.
  • the separator lines (6) are connected to the exhaust pipe (E) via conveying channels (61).
  • the conveying channels (61) extend the exhaust gas coming from the exhaust pipe (E) up to a certain height and then transfer it to the conducting channels (62).
  • the exhaust gas conveyed to the separator lines (6) is directed from the conducting channels (62) of the separator lines (6) to the mixing zone (52) in the flow conduit
  • the separator lines (6) can form a single part with flow conduit (5) or they can be separate parts from the flow conduit (5). In the present embodiment of the invention, the separator lines (6) are integral with the flow conduit (5).
  • the conducting channels (62) of the separator lines (6) are located on the contact surface (51) of the flow conduit (5). These conducting channels (62) of the separator lines (6) are arranged onto the projection or prior to the projection of injection field of the injector (4) on the wall so that this projection will be a reference. Connection of the conducting channels (62) to flow conduit (5) are preferably angled. Thanks to angular geometry, the possibility of collision of the reductant sprayed from the injector (4) against the inner walls of mixing zone (52) of flow conduit (5) is substantially reduced.
  • the separating lines (6) preferably provide a "curved" geometry. There is an angle between the conveying channels (61) of the separating lines (6) and the conducting channels (62). There is a rotation axis (63) provided in the zone, where the conveying channel (61) of separating line (6) is bend to the conducting channel (62). In the present embodiment of the invention, the axis of rotation (63) is slightly above the contact surface (51) of the flow conduit (5). Rotation axis (63) guides the exhaust gas coming from conveying channel (61) by changing its direction to the conducting channel (62). Thus, the exhaust gas enters the mixing zone (52) of the flow conduit (5) at an angle. The exhaust gas entering the flow conduit from the separating lines
  • the operation of the multi- manifold pipe (1) is realized as follows; The multi-manifold pipe is placed to the end of the exhaust pipe (E). Exhaust gas from the exhaust pipe (E) is transferred into the multi-manifold pipe (1) through the inlet opening (2).
  • the exhaust gas reaching the inlet port (2) is separated into lines and follows three different routes.
  • the flow conduit (5) forms the one of these lines and separator lines (6) form the further two lines.
  • the separator lines (6) carry the exhaust gas from the outside of the flow conduit (5) and direct the exhaust gas they carry to the mixing zone (52) located in the flow conduit (5).
  • the injector (4) injects a reductant fluid into the mixing zone (52) of the flow conduit (5).
  • the liquid injected into the flow conduit (5) is of a character reducing the harmful emissions in the exhaust gas.
  • the reductant enters reaction with the exhaust gas in the mixing zone (52).
  • the reductant sprayed from the injector (4) into flow conduit (5) impacts the inner walls of the mixing zone (52) of flow conduit
  • the separator lines (6) direct the exhaust gas they carry to the mixing zone (52) located in the flow conduit (5) at a certain angle. The exhaust gas guided by the separator lines
  • the possibility of colliding of the reducer sprayed from the injector (4) against the walls of the flow conduit (5) is minimized cause of low temperature and low exhaust gas flow.
  • the reductant is prevented from solidifying on the walls at low temperatures, thus an accumulation, that due to solidification occurs, disappears.
  • the emission values in the exhaust gas are kept in preferred levels, so the catalysts in the exhaust line are not damaged.

Landscapes

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

Abstract

La présente invention concerne un tuyau multi-collecteur (1), qui empêche la formation de dépôts pouvant résulter après l'injection d'un mélange réducteur dans les systèmes d'échappement à l'aide des techniques de réduction catalytique sélective active-SCR.
PCT/TR2017/050689 2016-12-23 2017-12-22 Tuyau multi-collecteur Ceased WO2018117994A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2016/19332 2016-12-23
TR201619332 2016-12-23

Publications (1)

Publication Number Publication Date
WO2018117994A1 true WO2018117994A1 (fr) 2018-06-28

Family

ID=61188879

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2017/050689 Ceased WO2018117994A1 (fr) 2016-12-23 2017-12-22 Tuyau multi-collecteur

Country Status (1)

Country Link
WO (1) WO2018117994A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115126580A (zh) * 2021-03-25 2022-09-30 普瑞姆有限公司 排气/反应剂混合结构组件

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012044233A1 (fr) * 2010-09-30 2012-04-05 Scania Cv Ab Ensemble pour introduire un milieu liquide dans des gaz d'échappement d'un moteur à combustion
WO2012053960A1 (fr) * 2010-10-22 2012-04-26 Scania Cv Ab (Publ) Aménagement pour l'introduction d'un agent liquide dans des gaz d'échappement provenant d'un moteur à combustion
WO2012089290A1 (fr) * 2010-12-27 2012-07-05 Friedrich Boysen Gmbh & Co. Kg Dispositif pour distribuer des fluides dans des systèmes d'échappement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012044233A1 (fr) * 2010-09-30 2012-04-05 Scania Cv Ab Ensemble pour introduire un milieu liquide dans des gaz d'échappement d'un moteur à combustion
WO2012053960A1 (fr) * 2010-10-22 2012-04-26 Scania Cv Ab (Publ) Aménagement pour l'introduction d'un agent liquide dans des gaz d'échappement provenant d'un moteur à combustion
WO2012089290A1 (fr) * 2010-12-27 2012-07-05 Friedrich Boysen Gmbh & Co. Kg Dispositif pour distribuer des fluides dans des systèmes d'échappement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115126580A (zh) * 2021-03-25 2022-09-30 普瑞姆有限公司 排气/反应剂混合结构组件
CN115126580B (zh) * 2021-03-25 2024-10-11 普瑞姆有限公司 排气/反应剂混合结构组件

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