SE2350737A1 - An exhaust gas aftertreatment device - Google Patents

An exhaust gas aftertreatment device

Info

Publication number
SE2350737A1
SE2350737A1 SE2350737A SE2350737A SE2350737A1 SE 2350737 A1 SE2350737 A1 SE 2350737A1 SE 2350737 A SE2350737 A SE 2350737A SE 2350737 A SE2350737 A SE 2350737A SE 2350737 A1 SE2350737 A1 SE 2350737A1
Authority
SE
Sweden
Prior art keywords
fluid passage
exhaust gases
exhaust gas
chamber
aftertreatment device
Prior art date
Application number
SE2350737A
Inventor
Adam Therning
Johan Assiks
Julia Claesson
Niklas Werner
Urban Persson
Original Assignee
Volvo Penta Corp
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 Volvo Penta Corp filed Critical Volvo Penta Corp
Priority to SE2350737A priority Critical patent/SE2350737A1/en
Priority to SE2450383A priority patent/SE2450383A1/en
Priority to PCT/EP2024/066336 priority patent/WO2024256523A1/en
Publication of SE2350737A1 publication Critical patent/SE2350737A1/en

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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • 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
    • 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
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/20—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a flow director or deflector
    • 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
    • F01N2470/00—Structure or shape of exhaust gas passages, pipes or tubes
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • 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
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • 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

The present invention relates an exhaust gas aftertreatment device (200, 300, 400), comprising:- an inner pipe (202, 302, 402) having an inner periphery (202A, 302A, 402A) and an outer periphery (202B, 302B, 402B), wherein the inner periphery defines a tubular inner fluid passage (206, 306, 406) being configured to channel exhaust gases flowing in a first direction, wherein at least one aftertreatment unit (230, 232, 330, 430, 432) for treating the exhaust gases is disposed in the tubular inner fluid passage (206, 306, 406), - an outer pipe (204, 304, 404) having an inner periphery (204A, 304A, 404A) defining an annular outer fluid passage (208,308, 408) together with the outer periphery (202B, 302B, 402B ) of the inner pipe (202, 302, 402), the annular outer fluid passage (208, 308, 408) being configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, wherein at least one aftertreatment unit (234, 236, 334, 434, 436) for treating the exhaust gases is disposed in the outer fluid passage (208,308, 408), and- a gas mixer (220, 320, 420) which diverts the exhaust gases flowing from the tubular inner fluid passage (206, 306) to the annular outer fluid passage (208, 308) or diverts the exhaust gases flowing from the annular outer fluid passage (408) to the tubular inner fluid passage (406), wherein the gas mixer (220, 320, 420) comprises at least one opening (226, 326, 426) arranged to inject a nitric oxide reduction agent into the gas mixer (220, 320, 420), such that the nitric oxide reduction agent is mixed with the exhaust gases within the gas mixer (220, 320, 420).

Description

TECHNICAL FIELD id="p-1" id="p-1" id="p-1" id="p-1" id="p-1" id="p-1" id="p-1"
[0001] The disclosure relates generally to an emission control of internal combustion engines. In particular aspects, the disclosure relates to an exhaust gas aftertreatment device, a vehicle and use of the exhaust gas aftertreatment device. The disclosure can be applied to heavy-duty vehicles, such as trucks, buses, and construction equipment, among other vehicle types. Although the disclosure may be described With respect to a particular vehicle, the disclosure is not restricted to any particular vehicle.
BAcKGRoUND [0002] reduce harrnful emissions from intemal combustion engines. These systems typically comprise Exhaust aftertreatment systems are used in vehicles, such as trucks and buses, to one or more aftertreatment units for treating the exhaust gases, such as Diesel Oxidation Catalyst (DOC) units, diesel particulate filters (DPF), Selective Catalyst Reduction (SCR) units, and ammonia slip catalysts (ASC) units. id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3" id="p-3"
[0003] carbon monoxide (CO), and Nitric Oxide (NO) from exhaust gases into less harrnful A DOC unit may be used to oxidize harrnful emissions such as hydrocarbon (HC), substances, and a DPF unit may then collect and remove particles, such as soot and ash, from the exhaust gases. Thereafter, a SCR unit may be used to reduce remaining NOX emissions, e.g., nitric oxide (NO) and nitrogen dioxide (NO2), by converting them into nitrogen and oxygen. Typically, a SCR unit is used in conjunction With a nitric oxide reduction agent, such as urea. As the exhaust gases and the urea mix, the urea undergoes a chemical reaction that produces ammonia, Which is then used in the SCR unit to reduce a level of harrnful NOX. During the process, the urea may break down into ammonia slip (NH3) and an ASC unit may be provided to convert the ammonia slip (NH3) into harrnless nitrogen (N 2) and Water (H2O). id="p-4" id="p-4" id="p-4" id="p-4" id="p-4" id="p-4" id="p-4"
[0004] above-mentioned aftertreatment units, there is still a strive to develop improved technology Even though there are various exhaust gas aftertreatment devices equipped With the relating to exhaust aftertreatment systems.
SUMMARY 2 id="p-5" id="p-5" id="p-5" id="p-5" id="p-5" id="p-5" id="p-5"
[0005] according to claim 1 is provided. The exhaust gas aftertreatment device comprises: According to a first aspect of the disclosure, an exhaust gas aftertreatment device - an inner pipe having an inner periphery and an outer periphery, wherein the inner periphery def1nes a tubular inner fluid passage being conf1gured to channel exhaust gases flowing in a first direction, wherein at least one aftertreatment unit for treating the exhaust gases is disposed in the tubular inner fluid passage, - an outer pipe having an inner periphery def1ning an annular outer fluid passage together with the outer periphery of the inner pipe, the annular outer fluid passage being configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, wherein at least one aftertreatment unit for treating the exhaust gases is disposed in the outer fluid passage, and - a gas mixer which diverts the exhaust gases flowing from the tubular inner fluid passage to the annular outer fluid passage or diverts the exhaust gases flowing from the annular outer fluid passage to the tubular inner fluid passage, wherein the gas mixer comprises at least one opening arranged to inject a nitric oxide reduction agent into the gas mixer, such that the nitric oxide reduction agent is mixed with the exhaust gases within the gas mixer. id="p-6" id="p-6" id="p-6" id="p-6" id="p-6" id="p-6" id="p-6"
[0006] aftertreatment device with a compact configuration, which may allow the exhaust gases to be The first aspect of the disclosure may seek to provide an improved exhaust gas treated in an efficient and effective manner in a single device. A technical benefit may include easy packaging and installation of the exhaust gas aftertreatment device. id="p-7" id="p-7" id="p-7" id="p-7" id="p-7" id="p-7" id="p-7"
[0007] outer passage, it may be possible to treat the exhaust gases at least twice within a single device.
By providing two fluid passages, namely the inner tubular passage and the annular The exhaust gases may be treated by the aftertreatment units disposed in the inner tubular passage and the annular outer passage, respectively. Different aftertreatment units may be selected and be placed in the respective passage depending on applications, e.g., depending on engine type. Furthermore, by channeling the exhaust gases flow in the outer tubular passage in a direction that is opposite to a direction of the exhaust gases in the inner tubular passage, it may enhance a heat transfer between the exhaust gases flow in the inner fluid passage and the 3 exhaust gases flow in the outer fluid passage due to the countercurrent flow pattern. This may imply improved efficiency of the treatment process. id="p-8" id="p-8" id="p-8" id="p-8" id="p-8" id="p-8" id="p-8"
[0008] used to reduce emissions of harrnful pollutants from an engine. The aftertreatment unit may The aftertreatment units disposed in the fluid passages may refer to any type of units contain any suitable catalysts for treating the exhaust gases. As another example, the aftertreatment unit may be a diesel particulate filter (DPF) Which Works to capture and store particulate matter, such as soot, from the exhaust gases. The nitric oxide reduction agent herein is to be understood as a chemical compound that is used to reduce emission of nitrogen oxides (NOX). By Way of example, the nitric oxide reduction agent may be urea. The urea may react With nitrogen oxides over a catalyst of the aftertreatment unit to form nitrogen gas and Water. id="p-9" id="p-9" id="p-9" id="p-9" id="p-9" id="p-9" id="p-9"
[0009] inner tubular passage and the annular outer passage, Within a single device, the nitric oxide By providing a gas mixer in the exhaust gas aftertreatment device, along With the reduction agent may be mixed With the exhaust gases in a more effective manner. As a result, the reaction between the nitric oxide reduction agent and the catalyst of the aftertreatment units may be enhanced, Which may lead to a more complete conversion of nitrogen oxides into less harrnful substances. In this Way, the exhaust gases may be treated in an efficient and effective IIIaIIIICT. id="p-10" id="p-10" id="p-10" id="p-10" id="p-10" id="p-10" id="p-10"
[0010] mixer is arranged to form a turbulence in a gas mixture of the exhaust gases and the injected Optionally in some examples, including in at least one preferred example, the gas nitric oxide reduction agent, such that mixing of the exhaust gases and the inj ected nitric oxide reduction agent is promoted. As such, the exhaust gases may be mixed With the nitric oxide reduction agent eff1ciently and effectively Within the gas mixer. A technical benefit may include that the exhaust gases are treated in an efficient and effective manner. id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11" id="p-11"
[0011] mixer is removably coupled to the exhaust gas aftertreatment device. Purely by Way of Optionally in some examples, including in at least one preferred example, the gas example, the gas mixer may be coupled to the exhaust gas treatment device via a V-clamp. As such, it may allow periodic inspection, cleaning, and replacement of the aftertreatment units 4 Without replacing the Whole exhaust gas aftertreatment device. A technical benefit may include easy maintenance of the exhaust gas aftertreatment device. id="p-12" id="p-12" id="p-12" id="p-12" id="p-12" id="p-12" id="p-12"
[0012] Optionally in some examples, including in at least one preferred example, the exhaust gas aftertreatment device further comprises at least one inductive heating element, configured to heat the at least one aftertreatment unit for treating the exhaust gases disposed in the tubular inner fluid passage and/or disposed in the annular outer fluid passage. This may be particularly beneficial during a cold start of a vehicle, as the heating element may quickly bring the exhaust gas aftertreatment device to a desired temperature range. The desired temperature range may, for example, be a light-off temperature at Which an aftertreatment catalyst becomes active. A technical benefit may include that the exhaust gases are treated in an efficient and effective manner. id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13" id="p-13"
[0013] least one inductive heating element comprises at least a first electromagnetic spiral coil and a Optionally in some examples, including in at least one preferred example, the at second electromagnetic spiral coil. The electromagnetic spiral coils may provide a high level of heating uniforrnity, ensuring that the space Within the exhaust gas treatment device is heated evenly, Which may improve an efficiency and an effectiveness of the aftertreatment process. A technical benefit may include that the exhaust gases are treated in an efficient and effective IIIaIIIICT. id="p-14" id="p-14" id="p-14" id="p-14" id="p-14" id="p-14" id="p-14"
[0014] Optionally in some examples, including in at least one preferred example, the first electromagnetic spiral coil is arranged around the outer periphery of the inner pipe, and Wherein the second electromagnetic spiral coil is arranged around the outer periphery of the outer pipe. In this Way, the tubular inner fluid passage and the annular outer fluid passage may be heated more uniforrnly. A technical benefit may include that an efficiency and an effectiveness of the aftertreatment process may be improved. id="p-15" id="p-15" id="p-15" id="p-15" id="p-15" id="p-15" id="p-15"
[0015] electromagnetic spiral coil and the second electromagnetic spiral coil are arranged to be Optionally in some examples, including in at least one preferred example, the first independently controlled. A technical benefit may include a precise control of temperature at the inner pipe and at the outer pipe, respectively. id="p-16" id="p-16" id="p-16" id="p-16" id="p-16" id="p-16" id="p-16"
[0016] exhaust gas aftertreatment device further comprises a heat exchanger connected to receive Optionally in some examples, including in at least one preferred example, the exhaust gases exiting the exhaust gas aftertreatment device and arranged to heat at least a portion of the exhaust gases that are going to enter the exhaust gas aftertreatment device. In this Way, the heat exchanger may utilize therrnal energy from the treated exhaust gases exiting the exhaust gas aftertreatment device to pre-heat the incoming exhaust gases. A technical benefit may include an improved efficiency of the aftertreatment process. id="p-17" id="p-17" id="p-17" id="p-17" id="p-17" id="p-17" id="p-17"
[0017] tubular inner fluid passage is fluidly connected to an inlet for receiving the exhaust gases from Optionally in some examples, including in at least one preferred example, the an intemal combustion engine, and Wherein the annular outer fluid passage is fluidly connected to an outlet for discharging exhaust gas emissions after being treated in the exhaust gas aftertreatment device. As such, the exhaust gases may enter the tubular inner fluid passage via the inlet. Thereafter, the exhaust gases may be directed radially outWard into the annular outer fluid passage through the gas mixer, and then exit the annular outer fluid passage via the outlet. id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18" id="p-18"
[0018] mixer is arranged doWnstream of the tubular inner fluid passage.
Optionally in some examples, including in at least one preferred example, the gas id="p-19" id="p-19" id="p-19" id="p-19" id="p-19" id="p-19" id="p-19"
[0019] mixer comprises a first chamber and a second chamber, Wherein the first chamber is positioned Optionally in some examples, including in at least one preferred example, the gas Within the second chamber. id="p-20" id="p-20" id="p-20" id="p-20" id="p-20" id="p-20" id="p-20"
[0020] chamber comprises a cylindrical chamber body, Which is defined by a cylindrical Wall Optionally in some examples, including in at least one preferred example, the first extending along a central axis of the tubular inner fluid passage. id="p-21" id="p-21" id="p-21" id="p-21" id="p-21" id="p-21" id="p-21"
[0021] Optionally in some examples, including in at least one preferred example, the first chamber further comprises an inlet and an outlet, Wherein the inlet comprises a first end and a second end, Wherein the first end of the inlet is fluidly connected to the tubular inner fluid passage, being configured to receive the exhaust gases from the tubular inner fluid passage, and Wherein the second end of the inlet is fluidly connected to the cylindrical chamber body of 6 the first Chamber. In this Way, the exhaust gases may floW from the tubular inner fluid passage into the first chamber via the inlet. id="p-22" id="p-22" id="p-22" id="p-22" id="p-22" id="p-22" id="p-22"
[0022] Optionally in some examples, including in at least one preferred example, the first chamber is arranged such that a gas mixture of the exhaust gases and the nitric oxide reduction agent undergoes at least one expansion and at least one compression Within the cylindrical chamber body such that a turbulence is formed in the gas mixture. The formation of the turbulence may promote mixing of the gas mixture. A technical benefit may include that the exhaust gases may be mixed With the nitric oxide reduction agent in an efficient and effective IIIaIIIICT. id="p-23" id="p-23" id="p-23" id="p-23" id="p-23" id="p-23" id="p-23"
[0023] Optionally in some examples, including in at least one preferred example, a cross- sectional area of the first end of the inlet of the first chamber is larger than a cross-sectional area of the second end of the inlet of the first chamber, and a cross-sectional area of the second end of the inlet of the first chamber is smaller than a cross-sectional area of the cylindrical chamber body of the first chamber. The exhaust gases floW may undergo one compression When flowing from the first end of the inlet to the second end of the inlet due to a decreased cross-sectional area. Thereafter, the exhaust gases floW may undergo one expansion When flowing from the second end of the inlet to the chamber body due to an increased cross- sectional area. In this Way, the turbulence may be formed Within the chamber body, Which may promote the mixing of the exhaust gases and the nitric oxide reduction agent. A technical benefit may include that the exhaust gases may be mixed With the nitric oxide reduction agent in an efficient and effective manner. id="p-24" id="p-24" id="p-24" id="p-24" id="p-24" id="p-24" id="p-24"
[0024] Optionally in some examples, including in at least one preferred example, a cross- sectional area of the outlet of the first chamber is smaller than the cross-sectional area of the cylindrical chamber body of the first chamber. As such, the gas mixture may undergo one more compression When exiting the first chamber. The mixing of the exhaust gases and the nitric oxide reduction agent may be further promoted. id="p-25" id="p-25" id="p-25" id="p-25" id="p-25" id="p-25" id="p-25"
[0025] To conclude, the mixing of exhaust gases and the nitric oxide reduction agent may be promoted by the formation of the turbulence. This may be achieved by incorporating varying cross-sectional areas in different parts of the first chamber to enable at least one compression 7 and expansion of the gas flow. For example, by the configuration of the exhaust gas aftertreatment device as disclosed herein, an efficient mixing of the exhaust gases may be achieved in a cost-effective manner. id="p-26" id="p-26" id="p-26" id="p-26" id="p-26" id="p-26" id="p-26"
[0026] mixer further comprises a flow deflector member attached to the outlet of the first chamber, Optionally in some examples, including in at least one preferred example, the gas the flow deflector member being configured to divert the gas mixture from the first chamber into the annular outer fluid passage via the second chamber. The flow deflector may help to ensure that the gas mixture is evenly redirected radially outward into the annular outer fluid passage, which may improve efficiency and effectiveness of the exhaust gas treatment process. id="p-27" id="p-27" id="p-27" id="p-27" id="p-27" id="p-27" id="p-27"
[0027] deflector member comprises a cylindrical plate extending along a central axis of the tubular Optionally in some examples, including in at least one preferred example, the flow inner fluid passage, wherein the cylindrical plate comprises a plurality of openings having a flow direction along a radial direction of the cylindrical plate. id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28" id="p-28"
[0028] Optionally in some examples, including in at least one preferred example, at least two aftertreatment units are disposed in the tubular inner fluid passage, the at least two aftertreatment units comprising a diesel oxidation catalyst (DOC) unit and a diesel particulate filter (DPF), wherein the diesel particulate filter (DPF) is arranged downstream of the diesel oxidation catalyst (DOC) unit. The DOC unit may be configured to oxidize harrnful emissions such as hydrocarbon (HC), carbon monoxide (CO), and Nitric Oxide (NO) into less harrnful substances, and the DPF unit may be arranged to collect and remove particles, such as soot and ash, from the exhaust gases. This arrangement may allow for the removal of both harrnful emissions and particles in a single device and/or in a single fluid passage. A compact arrangement of the aftertreatment units is therefore achieved. id="p-29" id="p-29" id="p-29" id="p-29" id="p-29" id="p-29" id="p-29"
[0029] Optionally in some examples, including in at least one preferred example, at least two aftertreatment units are disposed in the annular outer fluid passage, the at least two aftertreatment units comprising a selective catalytic reduction catalyst (SCR) unit and an ammonia slip catalyst (ASC) unit, wherein the ammonia slip catalyst (ASC) unit is arranged downstream of the selective catalytic reduction catalyst (SCR) unit. The SCR unit may be used, together with a nitric oxide reduction agent, e.g., urea, to reduce remaining NOx emissions in 8 the exhaust gases, e.g., nitric oxide (NO) and nitrogen dioxide (N02). During the process, the urea may break down into ammonia slip (NHg). The ASC unit may be provided downstream of the SCR unit and be used to convert the ammonia slip (NHg) into harrnless nitrogen (N 2) and water (H20). This arrangement may allow for the removal of both harrnful emissions in a single device and/or in a single fluid passage. As such, a compact arrangement of the aftertreatment units may therefore be achieved. id="p-30" id="p-30" id="p-30" id="p-30" id="p-30" id="p-30" id="p-30"
[0030] tubular inner fluid passage is fluidly connected to an outlet for discharging the exhaust gas Optionally in some examples, including in at least one preferred example, the emissions after being treated in the exhaust gas aftertreatment device and the annular outer fluid passage is fluidly connected to an inlet for receiving the exhaust gases from an intemal combustion engine. In this example, the exhaust gases may enter the annular outer fluid passage via the inlet. Thereafter, the exhaust gases may be directed inward into the tubular inner fluid passage through the gas mixer, and then exit the tubular inner fluid passage via the outlet. id="p-31" id="p-31" id="p-31" id="p-31" id="p-31" id="p-31" id="p-31"
[0031] two aftertreatment units are disposed in the tubular inner fluid passage, the at least two Optionally in some examples, including in at least one preferred example, at least aftertreatment units comprising a selective catalytic reduction catalyst and an ammonia slip catalyst, wherein the ammonia slip catalyst is arranged downstream of the selective catalytic reduction catalyst. This arrangement is conf1gured for examples of which the exhaust gases are flowing from the annular outer fluid passage to the tubular inner fluid passage. As mentioned above, it may allow for the removal of both harrnful emissions in a single device.
As such, a compact arrangement of the aftertreatment units may therefore be achieved. id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32" id="p-32"
[0032] Optionally in some examples, including in at least one preferred example, at least two aftertreatment units are disposed in the annular outer fluid passage, the at least two aftertreatment units comprising a diesel oxidation catalyst and a diesel particulate filter, and wherein the diesel particulate filter is arranged downstream of the diesel oxidation catalyst. This arrangement is conf1gured for examples of which the exhaust gases are flowing from the annular outer fluid passage to the tubular inner fluid passage. As mentioned above, it may allow for the removal of both harrnful emissions in a single device. As such, a compact arrangement of the aftertreatment units may therefore be achieved. 9 id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33" id="p-33"
[0033] aftertreatment device according to the first aspect is provided. According to a third aspect of According to a second aspect of the disclosure, a vehicle comprising an exhaust gas the disclosure, use of an exhaust gas aftertreatment device according to the first aspect is provided. id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34" id="p-34"
[0034] accompanying claims may be suitably combined with each other as would be apparent to The disclosed aspects, examples (including any preferred examples), and/or anyone of ordinary skill in the art. Additional features and advantages are disclosed in the following description, claims, and drawings, and in part will be readily apparent therefrom to those skilled in the art or recognized by practicing the disclosure as described herein.
BRIEF DESCRIPTION oF THE DRAWINGS id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35" id="p-35"
[0035] Examples are described in more detail below with reference to the appended drawings. [0036] FIG. 1 is a schematic side view of an exemplary vehicle comprising an exhaust gas aftertreatment device in accordance with an example of the present disclosure. id="p-37" id="p-37" id="p-37" id="p-37" id="p-37" id="p-37" id="p-37"
[0037] accordance with an example of the present disclosure.
FIG. 2 is a sectional view of an exemplary exhaust gas aftertreatrnent device in id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38" id="p-38"
[0038] FIG. 3 illustrates an inner part of the exemplary exhaust gas aftertreatment device of FIG. 2. [0039] FIG. 4 is a sectional view of another exemplary exhaust gas aftertreatment device in accordance with an example of the present disclosure. id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40" id="p-40"
[0040] accordance with an example of the present disclosure.
FIG. 5 illustrates an exhaust gas aftertreatrnent device arranged in a housing in Docket No.: [P2022-1117SE01/PG22571SE00] id="p-41" id="p-41" id="p-41" id="p-41" id="p-41" id="p-41" id="p-41"
[0041] FIG. 6 illustrates yet another example of an exhaust gas aftertreatment device, Where the exhaust gases enter the exhaust gas aftertreatment device through an annular outer fluid passage and exit the exhaust gas aftertreatrnent device from a tubular inner fluid passage.
DETAILED DESCRIPTION id="p-42" id="p-42" id="p-42" id="p-42" id="p-42" id="p-42" id="p-42"
[0042] The detailed description set forth below provides information and examples of the disclosed technology With sufficient detail to enable those skilled in the art to practice the disclosure. id="p-43" id="p-43" id="p-43" id="p-43" id="p-43" id="p-43" id="p-43"
[0043] reduce harrnful emissions from intemal combustion engines. An exhaust aftertreatment system Exhaust aftertreatment systems are used in vehicles, such as trucks and buses, to typically comprises one or more aftertreatment units for treating the exhaust gases, e.g., Diesel Oxidation Catalyst (DOC) units, diesel particulate filters (DPF), Selective Catalyst Reduction (SCR) units, and ammonia slip catalysts (ASC) units. id="p-44" id="p-44" id="p-44" id="p-44" id="p-44" id="p-44" id="p-44"
[0044] A DOC unit may be used to oxidize harrnful emissions such as hydrocarbon (HC), carbon monoxide (CO), and Nitric Oxide (NO) from exhaust gases into less harrnful substances, and a DPF unit may then collect and remove particles, such as soot and ash, from the exhaust gases. Thereafter, a SCR unit may be used to reduce remaining NOX emissions, e.g., nitric oxide (NO) and nitrogen dioxide (NO2), by converting them into nitrogen and oxygen. Typically, a SCR unit is used in conjunction With a nitric oxide reduction agent, such as urea. As the exhaust gases and the urea mix, the urea undergoes a chemical reaction that produces ammonia, Which is then used in the SCR unit to reduce a level of the harrnful NOX. During the process, the urea may break down into ammonia slip (NH3) and an ASC unit may be provided to convert the ammonia slip (NHg) into harrnless nitrogen (Ng) and Water (H20). id="p-45" id="p-45" id="p-45" id="p-45" id="p-45" id="p-45" id="p-45"
[0045] above-mentioned aftertreatment units, there is still a strive to develop improved technology Even though there are various exhaust gas aftertreatment devices equipped With the relating to exhaust gas aftertreatment systems, e.g., in terms of cost-effectiveness, both for installation and maintenance. 11 id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46" id="p-46"
[0046] device with a compact configuration, which may allow the exhaust gases to be treated in an The present disclosure may seek to provide an improved exhaust gas aftertreatrnent efficient and effective manner in a single device. A technical benefit may include easy packaging and installation of the exhaust gas aftertreatment device. id="p-47" id="p-47" id="p-47" id="p-47" id="p-47" id="p-47" id="p-47"
[0047] is shown, it shall be noted that the disclosure is not limited to this type of vehicle, but it may FIG. 1 depicts a vehicle 100, which is exemplified by a truck. Even though a truck also be used for other vehicles, such as a bus, or construction equipment, e.g., a wheel loader or an excavator. In some examples, the vehicle may be a marine vessel, e.g., a ship or a boat. id="p-48" id="p-48" id="p-48" id="p-48" id="p-48" id="p-48" id="p-48"
[0048] provide power for propelling the vehicle 100. The combustion engine 150 may be of any The vehicle 100 comprises an intemal combustion engine 150, configured to suitable type, for instance a diesel engine or a gasoline engine. The vehicle 100 further comprises an exhaust gas aftertreatment device 200, configured to treat the exhaust gases exiting the intemal combustion engine 150, in order to reduce harrnful emissions to the environment. Depending on the type of the combustion engine 150, the exhaust gas aftertreatment device 200 may comprise different aftertreatment units. In general, diesel engines emit higher levels of nitrogen oxides (N Ox), particulate matter (PM), and other harrnful pollutants than gasoline engines. Gasoline engines, on the other hand, typically emit higher levels of volatile organic compounds (VOCs) and carbon monoxide (CO) than diesel engines. As such, a diesel engine may require a DOC unit, a DPF, a SCR unit and/or an ASC unit to effectively reduce emissions of hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOX), and particulate matter (PM), while a gasoline engine may require a three-way catalytic converter to reduce emissions of HC, CO, and NOX. id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49" id="p-49"
[0049] FIG. 2 shows a sectional view of an exemplary exhaust gas aftertreatment device 200 and FIG. 3 illustrates an inner part of the exemplary exhaust gas aftertreatment device 200 of FIG. 2. For example, the exhaust gas aftertreatment device 200 in FIG. 1 may be the exhaust gas aftertreatment device 200 in FIG. 2 and FIG. 3. id="p-50" id="p-50" id="p-50" id="p-50" id="p-50" id="p-50" id="p-50"
[0050] pipe 204. Each of the inner pipe 202 and the outer pipe 204 comprises an inner periphery 202A, The exhaust gas aftertreatment device 200 comprises an inner pipe 202 and an outer 12 204A and an outer periphery 202B, 204B. The inner periphery 202 A of the inner pipe 202 def1nes a tubular inner fluid passage 206, configured to channel the exhaust gases flowing in a first direction, indicated by flow arrows in the inner fluid passage 206. The inner periphery 204A of the outer pipe 204 and an outer periphery 202B of the inner pipe 202 define an annular outer fluid passage 208, configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, as indicated by the flow arrows. The tubular inner fluid passage 206 may have a circular cross-section. In some other examples, the cross- sectional shape may be square, rectangular or any other suitable shape. id="p-51" id="p-51" id="p-51" id="p-51" id="p-51" id="p-51" id="p-51"
[0051] In the illustrated example shown in FIG. 2, the tubular inner fluid passage 206 is fluidly connected to an inlet 201A for receiving the exhaust gases from the intemal combustion engine 150, and the annular outer fluid passage 208 is fluidly connected to an outlet 201B for discharging exhaust gas emissions after being treated in the exhaust gas aftertreatment device 200. A DOC unit 230 and a DPF 232 are disposed in the tubular inner fluid passage 206. The DOC unit 230 may be configured to oxidize harrnful emissions, such as hydrocarbon (HC), carbon monoxide (CO), and Nitric Oxide (NO) into less harrnful substances, and the DPF unit 232 may be arranged downstream of the DOC unit 230, configured to collect and remove particles, such as soot and ash, from the exhaust gases. Furthermore, a SCR unit 234 and an ASC unit 236 are disposed in the annular outer fluid passage 208. The exhaust gas aftertreatment device 200 further comprises a gas mixer 210, arranged downstream of the tubular inner fluid passage 206, i.e., downstream in relation to the flow direction of the exhaust gases. The gas mixer 210 comprises an opening 226, arranged to inject a nitric oxide reduction agent into the gas mixer 210, such that the nitric oxide reduction agent is mixed with the exhaust gases within the gas mixer 210. In some examples, the nitric oxide reduction agent may be urea. The urea may undergo a chemical reaction that produces ammonia, which is then used in the SCR unit 234 to reduce the level of harrnful NOX. During the process, the urea may break down into ammonia slip (NHg) and the ASC unit 236 is arranged downstream of the SCR unit 234 to convert the ammonia slip (NHg) into harrnless nitrogen (Ng) and water (H20). id="p-52" id="p-52" id="p-52" id="p-52" id="p-52" id="p-52" id="p-52"
[0052] chamber 216 and a second chamber 220, whereby the first chamber 216 is positioned within In the illustrated example shown in FIG. 2, the gas mixer 210 comprises a first the second chamber 220. The first chamber 216 comprises a cylindrical chamber body 216°, 13 which is defined by a cylindrical wall 216" extending along a central axis X of the tubular inner fluid passage 206. The first chamber 216 further comprises an inlet 213A and an outlet 213B, whereby the inlet 213A further comprises a first end 212 and a second end 214. The first end 212 is fluidly connected to the tubular inner fluid passage 206, configured to receive the exhaust gases from the tubular inner fluid passage 206. The second end 214 of the inlet 213A is fluidly connected to the cylindrical chamber body 216" of the first chamber 216. In the illustrated example, each one of the first end 212 and the second end 214 of the inlet 213A, the cylindrical chamber body 216" of first chamber 216 and the outlet 213B has a circular cross- section. In some other examples, the cross-sectional shape of the above-mentioned elements may be square, rectangular or any other suitable shape. The cross-sectional areas of these parts may vary in size. More specifically, the first end 212 may as shown have a larger cross- sectional area than the second end 214 of the inlet 213A, whereas the second end 214 may as shown have a smaller cross-sectional area than the cylindrical chamber body 216" of the first chamber 216. Furthermore, the cross-sectional area of the outlet 213B may as shown be smaller than the cross-sectional area of the cylindrical chamber body 216" of the first chamber 216. id="p-53" id="p-53" id="p-53" id="p-53" id="p-53" id="p-53" id="p-53"
[0053] chamber 216 to facilitate the injection of the nitric oxide reduction agent into the first chamber In the illustrated example shown in FIG. 2, the opening 226 is arranged on the first 216. The exhaust gases flow, when flowing from the first end 212 to the second end 214 of the inlet 213A, may undergo one compression due to a decreased cross-sectional area. Thereafter, the exhaust gases flow may undergo one expansion when flowing from the inlet 213A into the chamber body 216" of the first chamber 216 due to an increased cross-sectional area. In this way, the turbulence may be formed within the first chamber 216, which may promote mixing of the exhaust gases and the nitric oxide reduction agent. Moreover, the gas mixture may undergo one more compression when exiting the first chamber 216. As such, the mixing of the exhaust gases and the nitric oxide reduction agent may be further enhanced. id="p-54" id="p-54" id="p-54" id="p-54" id="p-54" id="p-54" id="p-54"
[0054] flow deflector member 218 attached to the outlet 213B of the first chamber 216. The flow In the illustrated example shown in FIG. 2, the gas mixer 220 further comprises a deflector member 218 is configured to divert the gas mixture from the first chamber 216 into the annular outer fluid passage 208 via the second chamber 220. The flow deflector member 218 may comprise a cylindrical plate 217 extending along a central axis X of the tubular inner 14 fluid passage 206, whereby the cylindrical plate may comprise a plurality of openings 219 having a flow direction along a radial direction of the cylindrical plate 217. The cylindrical plate 217 may be securely fastened to an inner wall 221of the second chamber 220, allowing the gas mixer 210 to be constructed as a single unit. id="p-55" id="p-55" id="p-55" id="p-55" id="p-55" id="p-55" id="p-55"
[0055] inductive heating element 222, 224 to heat the aftertreatment units 230, 232, 234, 236 disposed The exhaust gas aftertreatment device 200 may further comprise at least one in the fluid passages. The inductive heating element may comprise a first electromagnetic spiral coil 222 and a second electromagnetic spiral coil 224, arranged around the outer periphery 202B of the inner pipe 202 and the outer periphery 204B of the outer pipe 204, respectively. This may be particularly benef1cial during a cold start of the vehicle 100, as the heating elements 222, 224 may quickly bring the exhaust gas aftertreatment device 200 to a desired temperature range, at which the catalysts become active. The first electromagnetic spiral coil 222 and the second electromagnetic spiral coil 224 may be arranged to be independently controlled, such that a precise control of temperature at the inner pipe 202 and at the outer pipe 204 may be achieved. A suitable power source (not shown) may be provided to supply AC current to the electromagnetic spiral coils 222, 224 for generating a magnetic field that is required for inductive heating. The control of the first electromagnetic spiral coil 222 and the second electromagnetic spiral coil 224 may be performed by controlling the power source, e.g. by adjusting the AC current and/or a voltage supplied by the power source. id="p-56" id="p-56" id="p-56" id="p-56" id="p-56" id="p-56" id="p-56"
[0056] In some examples, the exhaust gas aftertreatment device 200 may further comprise a heat exchanger (not shown), connected to receive exhaust gases exiting the exhaust gas aftertreatment device 200. The heat exchanger is arranged to heat at least a portion of the exhaust gases that are going to enter the exhaust gas aftertreatment device 200. In this way, the heat exchanger may utilize therrnal energy from the treated exhaust gases exiting the exhaust gas aftertreatment device 200 to pre-heat the incoming exhaust gases. id="p-57" id="p-57" id="p-57" id="p-57" id="p-57" id="p-57" id="p-57"
[0057] aftertreatment device 200. The gas mixer 210 may, for instance, be coupled to the exhaust gas In some examples, the gas mixer 210 may be removably coupled to the exhaust gas treatment device 200 via a V-clamp (not shown) at dash line A. As such, it may allow periodic inspection, Cleaning, and replacement of the aftertreatment units 230, 232, 234, 236 without replacing the Whole exhaust gas aftertreatment device 200. id="p-58" id="p-58" id="p-58" id="p-58" id="p-58" id="p-58" id="p-58"
[0058] gas mixer 310 does not comprise any flow deflector members. In general, a gas mixer without FIG. 4 shows another exemplary exhaust gas aftertreatment device 300, in which a a flow deflector may simplify a maintenance procedure, making it easier to clean the gas mixer when the gas mixer is removed from the exhaust aftertreatment device 300. id="p-59" id="p-59" id="p-59" id="p-59" id="p-59" id="p-59" id="p-59"
[0059] In the illustrated example shown in FIG. 4, the exhaust gas aftertreatment device 300 comprises an inner pipe 302 and an outer pipe 304 and each of the inner pipe 302 and the outer pipe 304 comprises an inner periphery 302A, 304A and an outer periphery 302B, 304B. The inner periphery 302A of the inner pipe 302 defines a tubular inner fluid passage 306, configured to channel the exhaust gases flowing in a first direction, indicated by flow arrows in the inner fluid passage 306. The inner periphery 304A of the outer pipe 304 and an outer periphery 302B of the inner pipe 302 define an annular outer fluid passage 308, configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, as indicated by the flow arrows in the outer fluid passage 308. The tubular inner fluid passage 306 may have a circular cross-section. In some other examples, the cross-sectional shape may be square, rectangular or any other suitable shape. id="p-60" id="p-60" id="p-60" id="p-60" id="p-60" id="p-60" id="p-60"
[0060] In the illustrated example shown in FIG. 4, the tubular inner fluid passage 306 is fluidly connected to an inlet 301A for receiving the exhaust gases from the intemal combustion engine 150, and the annular outer fluid passage 308 is fluidly connected to an outlet 301B for discharging exhaust gas emissions after being treated in the exhaust gas aftertreatment device 200. A first aftertreatment unit 330 is disposed in the tubular inner fluid passage 306 and a second aftertreatment unit 334 is disposed in the annular outer fluid passage 308, respectively. Similar to the above, the aftertreatment units 330, 334 may be any type of aftertreatment unit, containing suitable catalysts for treating exhaust gases or may be a diesel particulate filter (DPF). In some examples, the aftertreatment unit 330 disposed in the tubular inner fluid passage 306 is of the same type as the aftertreatment unit 334 disposed in the annular outer fluid passage 308. The exhaust gas aftertreatment device 300 further comprises a gas mixer 310, arranged downstream of the tubular inner fluid passage 206. The gas mixer 310 comprises 16 an opening 326, arranged to inject a nitric oxide reduction agent into the gas mixer 310 such that the nitric oxide reduction agent is mixed with the exhaust gases within the gas mixer 310. id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61" id="p-61"
[0061] whereby the first chamber 316 is positioned within the second chamber 320. The first chamber The gas mixer 310 comprises a first chamber 316 and a second chamber 320, 316 comprises a cylindrical chamber body 316°, which is defined by a cylindrical wall 316" extending along a central axis X of the tubular inner fluid passage 306. The first chamber 316 further comprises an inlet 313A and an outlet 313B and the inlet 313A further comprises a first end 312 and a second end 314. The first end 312 is fluidly connected to the tubular inner fluid passage 306 and is configured to receive the exhaust gases from the tubular inner fluid passage 306. The second end 314 of the inlet 313A is fluidly connected to the cylindrical chamber body 316" of the first chamber 316. In the illustrated example, each one of the first end 312 and the second end 314 of the inlet 313A, the cylindrical chamber body 316" of first chamber 316 and the outlet 213B has a circular cross-section. In some other examples, the cross-sectional shape of the above-mentioned elements may be square, rectangular or any other suitable shape. The cross-sectional areas of these parts may vary in size. More specifically, the first end 312 may as shown have a larger cross-sectional area than the second end 314 of the inlet 313A, whereas the second end 314 may as shown have a smaller cross-sectional area than the cylindrical chamber body 316" of the first chamber 316. Furthermore, the cross-sectional area of the outlet 213B may as shown be smaller than the cross-sectional area of the cylindrical chamber body 316" ofthe first chamber 316. id="p-62" id="p-62" id="p-62" id="p-62" id="p-62" id="p-62" id="p-62"
[0062] of the inlet 313A, may undergo one compression due to a decreased cross-sectional area.
The exhaust gases flow, when flowing from the first end 312 to the second end 314 Thereafter, the exhaust gases flow may undergo one expansion when flowing from the inlet 313A into the chamber body 316" of the first chamber 316 due to an increased cross-sectional area. In this way, the turbulence may be formed within the first chamber 316, which may promote mixing of the exhaust gases and the nitric oxide reduction agent. Moreover, the gas mixture may undergo one more compression when exiting the first chamber 316. id="p-63" id="p-63" id="p-63" id="p-63" id="p-63" id="p-63" id="p-63"
[0063] exiting the first chamber 316. Thereafter, the gas mixture may revert its direction and continue The exhaust gases flow may then flow into the second chamber 330 directly after 17 to flow into the outer fluid passage 308, as indicated by arrows. The exhaust may eventually flow out of the exhaust aftertreatment device 300 via the outlet 301B that is fluidly connected to the outer fluid passage 308. id="p-64" id="p-64" id="p-64" id="p-64" id="p-64" id="p-64" id="p-64"
[0064] housing 350, Which is illustrated in FIG. 5. The housing 350 may utilize an enveloping In some examples, the exhaust gas aftertreatment device 300 is arranged in a material, such as therrnal insulation, to help maintain a temperature Within the exhaust aftertreatment device 300. id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65" id="p-65"
[0065] Where the exhaust gases enter the exhaust gas aftertreatment device 400 through an annular FIG. 6 illustrates yet another example of an exhaust gas aftertreatment device 400, outer fluid passage 408 and exit the exhaust gas aftertreatment device 400 from a tubular inner fluid passage 406. The exhaust gases may enter the exhaust gas aftertreatment device 400 via an inlet 401B, Which is fluidly connected to the annular outer fluid passage 408. Thereafter, the exhaust gases may be directed inWard into the tubular inner fluid passage 406 through a gas mixer 420, and finally exit the tubular inner fluid passage 406 via an outlet 401B. In the illustrated example, the tubular inner fluid passage 406 is fluidly connected to the outlet 401B for discharging the exhaust gas emissions after being treated in the exhaust gas aftertreatment device 400, and the annular outer fluid passage 408 is fluidly connected to the inlet 401A for receiving the exhaust gases from an intemal combustion engine 150. In the illustrated example, a SCR 432 unit and an ASC unit 430 may be disposed in the tubular inner fluid passage 406, Whereby the ASC unit 430 is arranged doWnstream of the SCR unit 432. Furthermore, a DOC unit 436 and a DPF 434 may be disposed in the annular outer fluid passage 408, Whereby the DPF 434 is arranged doWnstream of the DOC unit 436. id="p-66" id="p-66" id="p-66" id="p-66" id="p-66" id="p-66" id="p-66"
[0066] examples and combination of examples.
Moreover, the present disclosure may be exemplified by any one of the below id="p-67" id="p-67" id="p-67" id="p-67" id="p-67" id="p-67" id="p-67"
[0067] Example 1: An exhaust gas aftertreatment device 200, 300, 400, comprising: - an inner pipe 202, 302, 402 having an inner periphery 202A, 302A, 402A, and an outer periphery 202B, 302B, 402B, Wherein the inner periphery 202A, 302A, 402A def1nes a tubular inner fluid passage 206, 306, 406 being configured to channel exhaust gases floWing in a first direction, Wherein at least one aftertreatment unit 230, 232, 330, 430, 18 432 for treating the exhaust gases is disposed in the tubular inner fluid passage 206, 306, 406, - an outer pipe 204, 304, 404 having an inner periphery 204A, 304A, 404A defining an annular outer fluid passage 208,308, 408 together With the outer periphery 202B, 302B, 402B of the inner pipe, the annular outer fluid passage 208, 308, 408 being configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, Wherein at least one aftertreatment unit 234, 236, 334, 436, 434 for treating the exhaust gases is disposed in the outer fluid passage 208,308, 408, and - a gas mixer 220, 320, 420 Which diverts the exhaust gases flowing from the tubular inner fluid passage 206, 306 to the annular outer fluid passage 208, 308 or diverts the exhaust gases flowing from the annular outer fluid passage 408 to the tubular inner fluid passage 406, Wherein the gas mixer 220, 320, 420 comprises at least one opening 226, 326, 426 arranged to inject a nitric oxide reduction agent into the gas mixer 220, 320, 420, such that the nitric oxide reduction agent is mixed With the exhaust gases Within the gas mixer 220, 320, 420. id="p-68" id="p-68" id="p-68" id="p-68" id="p-68" id="p-68" id="p-68"
[0068] Wherein the gas mixer 220, 320, 420 is arranged to form a turbulence in a gas mixture of the Example 2: The exhaust gas aftertreatment device 200, 300, 400 of Example 1, exhaust gases and the injected nitric oxide reduction agent, such that mixing of the exhaust gases and the injected nitric oxide reduction agent is promoted. id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69" id="p-69"
[0069] Wherein the gas mixer 220, 320, 420 is removably coupled to the exhaust gas aftertreatment device 200, 300, 400.
Example 3: The exhaust gas aftertreatment device 200, 300, 400 of Example 1 or 2, id="p-70" id="p-70" id="p-70" id="p-70" id="p-70" id="p-70" id="p-70"
[0070] preceding Examples, further comprising at least one inductive heating element, conf1gured to heat the at least one aftertreatment units 230, 232, 234, 236, 330, 334, 430, 434 for treating the Example 4: The exhaust gas aftertreatment device 200, 300, 400 of any one of the exhaust gases disposed in the tubular inner fluid passage 206, 306, 406 and/or disposed in the annular outer fluid passage 208, 308, 408. 19 id="p-71" id="p-71" id="p-71" id="p-71" id="p-71" id="p-71" id="p-71"
[0071] least one inductive heating element comprises at least a first electromagnetic spiral coil 222, Example 5: The exhaust gas aftertreatment device 200 of Example 4, Wherein the at 322, 422 and a second electromagnetic spiral coil 224, 324, 424. id="p-72" id="p-72" id="p-72" id="p-72" id="p-72" id="p-72" id="p-72"
[0072] first electromagnetic spiral coil 222, 322, 422 is arranged around the outer periphery 202B, Example 6: The exhaust gas aftertreatment device 200 of Example 5, Wherein the 302B, 402B of the inner pipe 202, 302, 402 and Wherein the second electromagnetic spiral coil 224, 324, 424 is arranged around the outer periphery 204B, 304B, 404B of the outer pipe 204, 304, 404. id="p-73" id="p-73" id="p-73" id="p-73" id="p-73" id="p-73" id="p-73"
[0073] first electromagnetic spiral coil 222, 322, 422 and the second electromagnetic spiral coil 224, Example 7: The exhaust gas aftertreatment device 200 of Example 6, Wherein the 324, 424 are arranged to be independently controlled. id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74" id="p-74"
[0074] preceding Examples, further comprising a heat exchanger connected to receive exhaust gases Example 8: The exhaust gas aftertreatment device 200, 300, 400 of any one the exiting the exhaust gas aftertreatment device 200, 300, 400 and arranged to heat at least a portion of the exhaust gases that are going to enter the exhaust gas aftertreatment device 200, 300, 400. id="p-75" id="p-75" id="p-75" id="p-75" id="p-75" id="p-75" id="p-75"
[0075] preceding Examples, Wherein the tubular inner fluid passage 206, 306 is fluidly connected to Example 9: The exhaust gas aftertreatment device 200, 300 of any one of the an inlet 201A, 301A for receiving the exhaust gases from an intemal combustion engine 150, and Wherein the annular outer fluid passage 208, 308 is fluidly connected to an outlet 201B, 301B for discharging exhaust gas emissions after being treated in the exhaust gas aftertreatment device 200, 300. id="p-76" id="p-76" id="p-76" id="p-76" id="p-76" id="p-76" id="p-76"
[0076] preceding Examples, Wherein the gas mixer 220, 320 is arranged doWnstream of the tubular Example 10: The exhaust gas aftertreatment device 200, 300 of any one of the inner fluid passage 206, 306. id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77" id="p-77"
[0077] , Wherein the gas mixer 220, 320 comprises a first chamber 216, 316 and a second chamber Example 11: The exhaust gas aftertreatment device 200, 300 according to Example 220, 320, Wherein the first Chamber 216, 316 is positioned Within the second Chamber 220, 320. id="p-78" id="p-78" id="p-78" id="p-78" id="p-78" id="p-78" id="p-78"
[0078] the first Chamber 216, 316 comprises a cylindrical Chamber body 216", 316°, Which is defined Example 12: The exhaust gas aftertreatment device 200, 300 of Example 11, Wherein by a cylindrical Wall 216", 316" extending along a central axis X of the tubular inner fluid passage 206, 306. id="p-79" id="p-79" id="p-79" id="p-79" id="p-79" id="p-79" id="p-79"
[0079] the first chamber 216, 316 further comprises an inlet 213A, 313A and an outlet 213B, 313B, Wherein the inlet 213A, 313A comprises a first end 212, 312 and a second end 214, 314, Wherein the first end 212, 312 of the inlet 213A, 313A is fluidly connected to the tubular inner Example 13: The exhaust gas aftertreatment device 200, 300 of Example 12, Wherein fluid passage 206, 306, being configured to receive the exhaust gases from the tubular inner fluid passage 206, 306, and Wherein the second end 214, 314 of the inlet 213A, 313A is fluidly connected to the cylindrical chamber body of the first chamber 216, 316. id="p-80" id="p-80" id="p-80" id="p-80" id="p-80" id="p-80" id="p-80"
[0080] Example 14: The exhaust gas aftertreatment device 200, 300 of Example 13, Wherein the first chamber 216, 316 is arranged such that a gas mixture of the exhaust gases and the nitric oxide reduction agent undergoes at least one expansion and at least one compression Within the cylindrical chamber body 216°, 316" and a turbulence is formed thereafter in the gas mixture. id="p-81" id="p-81" id="p-81" id="p-81" id="p-81" id="p-81" id="p-81"
[0081] a cross-sectional area of the first end 212, 312 of the inlet 213A, 313A of the first chamber 216, 316 is larger than a cross-sectional area of the second end 214, 314 of the inlet 213A, 313A of Example 15: The exhaust gas aftertreatment device 200, 300 of Example 14, Wherein the first chamber 216, 316, and Wherein the cross-sectional area of the second end 214, 314 of the inlet 213A, 313A of the first chamber 216, 316 is smaller than a cross-sectional area of the cylindrical chamber body 216°, 316" of the first chamber 216, 316. id="p-82" id="p-82" id="p-82" id="p-82" id="p-82" id="p-82" id="p-82"
[0082] a cross-sectional area of the outlet 213B, 313B of the first chamber 216, 316 is smaller than Example 16: The exhaust gas aftertreatment device 200, 300 of Example 15, Wherein the cross-sectional area of the cylindrical chamber body 216°, 316" of the first chamber 216, 3 16. 21 id="p-83" id="p-83" id="p-83" id="p-83" id="p-83" id="p-83" id="p-83"
[0083] 1 1-16, Wherein the gas mixer 220, 320 further comprises a flow deflector member 218 attached Example 17: The exhaust gas aftertreatment device 200, 300 of any one of Examples to the outlet of the first chamber 216, 316, the flow deflector member 218 being configured to divert the gas mixture from the first chamber 216, 316 into the annular outer fluid passage 208, 308 via the second chamber. id="p-84" id="p-84" id="p-84" id="p-84" id="p-84" id="p-84" id="p-84"
[0084] the flow deflector member 218 comprises a cylindrical plate 217 extending along a central axis Example 18: The exhaust gas aftertreatment device 200, 300 of Example 17, Wherein X of the tubular inner fluid passage 206, 306, Wherein the cylindrical plate 217 comprises a plurality of openings 2019 having a floW direction along a radial direction of the cylindrical plate. id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85" id="p-85"
[0085] Examples, Wherein at least tWo aftertreatment units 230, 232 are disposed in the tubular inner Example 19: The exhaust gas aftertreatment device 200 of any one of the preceding fluid passage 206, 306, the at least tWo aftertreatment units 230, 232 comprising a diesel oxidation catalyst unit 230 and a diesel particulate filter 232, Wherein the diesel particulate filter 232 is arranged doWnstream of the diesel oxidation catalyst unit 230. id="p-86" id="p-86" id="p-86" id="p-86" id="p-86" id="p-86" id="p-86"
[0086] preceding Examples, Wherein at least tWo aftertreatment units 232, 236 are disposed in the Example 20: The exhaust gas aftertreatment device 200 according to anyone of the annular outer fluid passage 208, 308, the at least tWo aftertreatment units 232, 236 comprising a selective catalytic reduction unit 232 and an ammonia slip catalyst unit 236, Wherein the ammonia slip catalyst unit 236 is arranged doWnstream of the selective catalytic reduction unit 232. id="p-87" id="p-87" id="p-87" id="p-87" id="p-87" id="p-87" id="p-87"
[0087] Wherein the tubular inner fluid passage 406 is fluidly connected to an outlet 401B for Example 21: The exhaust gas aftertreatment device 400 of anyone of Examples 1-8, discharging the exhaust gas emissions after being treated in the exhaust gas aftertreatment device 400 and the annular outer fluid passage 408 is fluidly connected to an inlet 401A for receiving the exhaust gases from an intemal combustion engine 150. 22 id="p-88" id="p-88" id="p-88" id="p-88" id="p-88" id="p-88" id="p-88"
[0088] two aftertreatment units 430, 432 are disposed in the tubular inner fluid passage 406, the at Example 22: The exhaust gas aftertreatment device of Example 21, wherein at least least two aftertreatment units 430, 432 comprising a selective catalytic reduction unit 432 and an ammonia slip catalyst unit 430, wherein the ammonia slip catalyst unit 430 is arranged downstream of the selective catalytic reduction catalyst unit 432. id="p-89" id="p-89" id="p-89" id="p-89" id="p-89" id="p-89" id="p-89"
[0089] wherein at least two aftertreatment units 434, 436 are disposed in the annular outer fluid Example 23: The exhaust gas aftertreatment device of Example 22 or Example 23, passage 408, the at least two aftertreatment units 434, 436 comprising a diesel oxidation catalyst unit 436 and a diesel particulate filter 434, and wherein the diesel particulate filter 434 is arranged downstream of the diesel oxidation catalyst unit 436. id="p-90" id="p-90" id="p-90" id="p-90" id="p-90" id="p-90" id="p-90"
[0090] 300, 400 of anyone of the preceding Examples.
Example 24: A vehicle 100 comprising the exhaust gas aftertreatment device 200, id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91" id="p-91"
[0091] of Examples 1-24 for treating exhaust gases from an internal combustion engine 150.
Example 25: Use of the exhaust gas aftertreatment device 200, 300, 400 of any one id="p-92" id="p-92" id="p-92" id="p-92" id="p-92" id="p-92" id="p-92"
[0092] described above and illustrated in the drawings; rather, the skilled person will recognize that It is to be understood that the present disclosure is not limited to the aspects many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims. id="p-93" id="p-93" id="p-93" id="p-93" id="p-93" id="p-93" id="p-93"
[0093] and is not intended to be limiting of the disclosure. As used herein, the singular forrns The terrninology used herein is for the purpose of describing particular aspects only "a", "an", and "the" are intended to include the plural forrns as well, unless the context clearly indicates otherwise. As used herein, the terrn "and/or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises", "comprising", "includes", and/or "including" when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and/or components, but do not preclude 23 the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and/or groups thereof id="p-94" id="p-94" id="p-94" id="p-94" id="p-94" id="p-94" id="p-94"
[0094] to describe various elements, these elements should not be limited by these terrns. These terrns It will be understood that, although the terrns first, second, etc., may be used herein are only used to distinguish one element from another. For example, a first element could be terrned a second element, and, similarly, a second element could be terrned a first element without departing from the scope of the present disclosure. id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95" id="p-95"
[0095] Relative terrns such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terrns and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. id="p-96" id="p-96" id="p-96" id="p-96" id="p-96" id="p-96" id="p-96"
[0096] herein have the same meaning as commonly understood by one of ordinary skill in the art to Unless otherwise defined, all terrns (including technical and scientific terrns) used which this disclosure belongs. It will be further understood that terrns used herein should be interpreted as having a meaning consistent with their meaning in the context of this specif1cation and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Claims (1)

1. Claims 1. the gas An exhaust gas aftertreatment device (200, 300, 400), comprising: an inner pipe (202, 302, 402) having an inner periphery (202A, 302A, 402A) and an outer periphery (202B, 302B, 402B), Wherein the inner periphery def1nes a tubular inner fluid passage (206, 306, 406) being configured to channel exhaust gases flowing in a first direction, Wherein at least one aftertreatment unit (230, 232, 330, 430, 432) for treating the exhaust gases is disposed in the tubular inner fluid passage (206, 306, 406), an outer pipe (204, 304, 404) having an inner periphery (204A, 304A, 404A) defining an annular outer fluid passage (208,308, 408) together With the outer periphery (202B, 302B, 402B) of the inner pipe (202, 302, 402), the annular outer fluid passage (208, 308, 408) being configured to channel the exhaust gases flowing in a second direction that is substantially opposite to the first direction, Wherein at least one aftertreatment unit (234, 236, 334, 434, 436) for treating the exhaust gases is disposed in the outer fluid passage (208,308, 408), and a gas mixer (220, 320, 420) Which diverts the exhaust gases flowing from the tubular inner fluid passage (206, 306) to the annular outer fluid passage (208, 308) or diverts the exhaust gases flowing from the annular outer fluid passage (408) to the tubular inner fluid passage (406), Wherein the gas mixer (220, 320, 420) comprises at least one opening (226, 326, 426) arranged to inject a nitric oxide reduction agent into the gas mixer (220, 320, 420), such that the nitric oxide reduction agent is mixed With the exhaust gases Within the gas mixer (220, 320, 420). The exhaust gas aftertreatment device (200, 300, 400) according to claim 1, Wherein mixer (220, 320, 420) is removably coupled to the exhaust gas aftertreatment device (200,300,400) The exhaust gas aftertreatment device (200, 300, 400) according to any one of the preceding claims, further comprising at least one inductive heating element (222, 224, 322, 324,2, 424), conf1gured to heat the at least one aftertreatment units (230, 232, 234, 236, 330, 334, 430, 432, 434, 436,) for treating the exhaust gases disposed in the tubular inner fluid passage (206, 306, 406) and/or disposed in the annular outer fluid passage (208, 308, 408). 4. The exhaust gas aftertreatment device (200, 300, 400) according to claim 3, Wherein the at least one inductive heating element comprises at least a first electromagnetic spiral coil (222, 322, 422) and a second electromagnetic spiral coil (224, 324, 326), and optionally Wherein the first electromagnetic spiral coil (222, 322, 422) is arranged around the outer periphery (202B, 302B, 402B) of the inner pipe (202, 302, 402), and Wherein the second electromagnetic spiral coil (224, 324, 424) is arranged around the outer periphery (204B, 304B, 404B) of the outer pipe (204, 304, 404). 5. The exhaust gas aftertreatment device (200, 300) according to any one of the proceeding claims, Wherein the gas mixer (220, 320) comprises a first chamber (216, 316) and a second chamber (220, 320), Wherein the first chamber (216, 316) is positioned Within the second chamber (220, 320). 6. The exhaust gas aftertreatment device (200, 300) according to claim 5, Wherein the first chamber (216, 316) comprises a cylindrical chamber body (216”, 316°), Which is defined by a cylindrical Wall (216° °, 316” ”) extending along a central axis (X) of the tubular inner fluid passage (206, 306). 7. The exhaust gas aftertreatment device (200, 300) according to claim 6, Wherein the first chamber (216, 316) further comprises an inlet (213A, 313A) and an outlet (213B, 313B), Wherein the inlet (213A, 313A) comprises a first end (212, 312) and a second end (214, 314), Wherein the first end (212, 312) of the inlet (213A, 313A) is fluidly connected to the tubular inner fluid passage (206, 306), being configured to receive the exhaust gases from the tubular inner fluid passage (206, 306), and Wherein the second end (214, 314) of the inlet (213A, 313A) is fluidly connected to the cylindrical chamber body (216”, 316°) of the first chamber (216, 3 16). 8. The exhaust gas aftertreatment device (200, 300) according to claim 7, Wherein the first chamber (216, 316) is arranged such that a gas mixture of the exhaust gases and the nitric oxide reduction agent undergoes at least one expansion and at least one compression Within the cylindrical chamber body (216°, 316°) such that a turbulence is formed thereafter in the gas mixture. The exhaust gas aftertreatnient device (200, 300) according to c1ain1 8, Wherein a cross- sectional area of the first end (212, 312) of the in1et (213A, 313A) of the first chan1ber (216, 316) is larger than a cross-sectiona1 area of the second end (214, 314) of the inlet (213A, 313A) of the first chan1ber (216, 316), and Wherein the cross-sectiona1 area of the second end (214, 314) of the in1et (213A, 313A) of the first chan1ber (216, 316) is sn1a11er than a cross-sectiona1 area of the cy1indrica1 chan1ber body (216”, 316”) of the first chan1ber (216, 316). 10. A vehicle (100) coniprising an exhaust gas aftertreatnient device (200, 300, 400) according any one of the preceding c1aims.
SE2350737A 2023-06-16 2023-06-16 An exhaust gas aftertreatment device SE2350737A1 (en)

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PCT/EP2024/066336 WO2024256523A1 (en) 2023-06-16 2024-06-13 An exhaust gas aftertreatment device

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US6444177B1 (en) * 1995-06-28 2002-09-03 Siemens Aktiengesellschaft Process and device for the catalytic cleaning of the exhaust gas from a combustion plant
US20060153748A1 (en) * 2002-10-25 2006-07-13 Georg Huthwohl Exhaust gas after treatment system, especially for a diesel engine
US20080264048A1 (en) * 2004-11-25 2008-10-30 Komatsu Ltd. Exhaust Gas Purification Device for Internal Combustion Engine
US20110219755A1 (en) * 2008-09-24 2011-09-15 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust-gas purification system for diesel engines
US20150240692A1 (en) * 2014-02-25 2015-08-27 Donaldson Company, Inc. Exhaust aftertreatment device
CN105402009A (en) * 2015-12-17 2016-03-16 无锡威孚力达催化净化器有限责任公司 Spiral mixer for integrated injection of SCR catalyst

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Publication number Priority date Publication date Assignee Title
US6444177B1 (en) * 1995-06-28 2002-09-03 Siemens Aktiengesellschaft Process and device for the catalytic cleaning of the exhaust gas from a combustion plant
US20060153748A1 (en) * 2002-10-25 2006-07-13 Georg Huthwohl Exhaust gas after treatment system, especially for a diesel engine
US20080264048A1 (en) * 2004-11-25 2008-10-30 Komatsu Ltd. Exhaust Gas Purification Device for Internal Combustion Engine
US20110219755A1 (en) * 2008-09-24 2011-09-15 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Exhaust-gas purification system for diesel engines
US20150240692A1 (en) * 2014-02-25 2015-08-27 Donaldson Company, Inc. Exhaust aftertreatment device
CN105402009A (en) * 2015-12-17 2016-03-16 无锡威孚力达催化净化器有限责任公司 Spiral mixer for integrated injection of SCR catalyst

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