GB2558311A - Flow distribution arrangement for aftertreatment of exhaust gas - Google Patents
Flow distribution arrangement for aftertreatment of exhaust gas Download PDFInfo
- Publication number
- GB2558311A GB2558311A GB1622445.3A GB201622445A GB2558311A GB 2558311 A GB2558311 A GB 2558311A GB 201622445 A GB201622445 A GB 201622445A GB 2558311 A GB2558311 A GB 2558311A
- Authority
- GB
- United Kingdom
- Prior art keywords
- exhaust gas
- housing
- tubular element
- perforated tubular
- flow
- 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.)
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Classifications
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- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features
- F01N13/011—Exhaust or silencing apparatus characterised by constructional features having two or more purifying devices arranged in parallel
- F01N13/017—Exhaust or silencing apparatus characterised by constructional features having two or more purifying devices arranged in parallel 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
- 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
- F01N2470/02—Tubes being perforated
-
- 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
- F01N2470/18—Structure or shape of exhaust gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
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- 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
An apparatus for aftertreatment of exhaust gas, eg from i.c. engines, comprises a housing 230 having an exhaust gas inlet 220 on a lateral surface 233 between bases 231, 232 of the housing 230; a substrate 240, 241, eg DOC, DPF, SCR, within the housing 230 downstream of the exhaust inlet 220 such that the exhaust gas flows through the substrate; and a flow distribution arrangement comprising a conical perforated tubular element 250 upstream of the substrate 240,241 to guide the exhaust gas flow to enter the substrate evenly. The central axis of the conical perforated tubular element 250 is at 0 to 70 degrees with respect to, eg parallel to, the longitudinal axis of the housing 230. The central axis of the exhaust gas inlet 220 intersects a lateral surface of the housing 230. A second conical perforated element (410, fig.4) may be provided upstream of a second substrate (410). A reactant inlet and mixer, eg for ammonia or urea, may also be provided.
Description
(54) Title ofthe Invention: Flow distribution arrangement for aftertreatment of exhaust gas Abstract Title: Exhaust gas aftertreatment apparatus (57) An apparatus for aftertreatment of exhaust gas, eg from i.e. engines, comprises a housing 230 having an exhaust gas inlet 220 on a lateral surface 233 between bases 231,232 ofthe housing 230; a substrate 240, 241, eg DOC, DPF, SCR, within the housing 230 downstream of the exhaust inlet 220 such that the exhaust gas flows through the substrate; and a flow distribution arrangement comprising a conical perforated tubular element 250 upstream of the substrate 240,241 to guide the exhaust gas flow to enter the substrate evenly. The central axis of the conical perforated tubular element 250 is at 0 to 70 degrees with respect to, eg parallel to, the longitudinal axis of the housing 230. The central axis of the exhaust gas inlet 220 intersects a lateral surface of the housing 230. A second conical perforated element (410, fig.4) may be provided upstream of a second substrate (410). A reactant inlet and mixer, eg for ammonia or urea, may also be provided.
/7
100
121
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Fig. 2a
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SECTION B-B
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SECTION A-A
Fig. 4a
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Fig. 4c
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Fig. 5b
FLOW DISTRIBUTION ARRANGEMENT FOR AFTERTREATMENT OF EXHAUST GAS
TECHNICAL FIELD [0001] The present application generally relates to a system, method and apparatus for aftertreatment of exhaust gas.
BACKGROUND ART [0002] Emission regulations for internal combustion engines have tightened over recent years, and the trend is even tightening. For example, regulated emissions of NOx and particles from internal combustion engines are becoming so low that the target emissions levels are hard to be met. Therefore, aftertreatment systems are used in engines to reduce emissions. For reducing NOx emissions, NOx reduction catalysts, including selective catalytic reduction (SCR) systems, are utilized to convert NOx (NO and NO2) to N2 and other compounds. SCR systems utilize a reactant, such as ammonia, to reduce the NOx.
[0003] Simultaneously with the emission regulation demands, also power and efficiency demands for engines increase. On top of that the internal combustion engines should be designed and manufactured with smaller size, inline design and decreased weight, if possible.
[0004] A solution is needed for cost-efficiently providing an aftertreatment system of exhaust gas for internal combustion engine to reduce emissions capable of fulfilling the requirements for emission regulations without sacrificing too much power and efficiency of the engine and do all this in compact size with inline housing design.
SUMMARY [0005] According to a first example aspect of the invention there is provided an apparatus for aftertreatment of exhaust gas comprising:
a housing having a longitudinal axis that extends between a first base and a second base of the housing with a lateral surface between the first and the second base;
an exhaust gas inlet being positioned on the lateral surface between the first base and the second base of the housing for entering exhaust gas flow into an interior of the housing;
a substrate being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrate in direction of the longitudinal axis;
a flow distribution arrangement positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the substrate, the flow distribution arrangement comprising a conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing;
wherein the conical perforated tubular element is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the conical perforated tubular element to evenly enter the substrate.
[0006] In an embodiment, the flow distribution arrangement comprises a conical perforated tubular element whose central axis is parallel to the longitudinal axis of the housing.
[0007] In an embodiment, the exhaust gas inlet has a central axis perpendicular to the longitudinal axis of the housing.
[0008] In an embodiment, the exhaust gas inlet is arranged tangentially to the housing.
[0009] In an embodiment, the exhaust gas inlet is arranged vertically or horizontally inclined to the housing.
[0010] In an embodiment, the conical perforated tubular element comprises apertures evenly around the whole lateral surface of the conical perforated tubular element.
[0011] In an embodiment, the conical perforated tubular element comprises apertures only on a portion of the lateral surface of the conical perforated tubular element.
[0012] In an embodiment, the portion of the lateral surface of the conical perforated tubular element not comprising apertures is arranged to the portion adjacent to the exhaust gas inlet.
[0013] In an embodiment, a first end of the conical perforated tubular element is connected to an interior wall of the first base of the housing.
[0014] In an embodiment, the apparatus further comprises a gap arranged between a first end of the conical perforated tubular element and an interior wall of the first base of the housing, wherein the exhaust gas flow is allowed to flow through the gap within the interior of the housing before entering through the apertures on the lateral surface of the conical perforated tubular element.
[0015] In an embodiment, the central axis of the exhaust gas inlet intersects a lateral surface of the conical perforated tubular element.
[0016] In an embodiment, the apparatus further comprises: a second substrate being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates in direction of the longitudinal axis;
a second flow distribution arrangement positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the second substrate, the second flow distribution arrangement comprising a second conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing;
wherein the second conical perforated tubular element is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the second conical perforated tubular element to evenly enter the second substrate.
[0017] In an embodiment, the substrates are positioned parallel within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates in direction of the longitudinal axis.
[0018] In an embodiment, the exhaust gas inlet having a central axis intersecting a boundary between the two parallel substrates within the interior of the housing.
[0019] In an embodiment, the apparatus further comprises a gap arranged between first ends of the conical perforated tubular elements and an interior wall of the first base of the housing, wherein the exhaust gas flow is allowed to flow within the gap within the interior of the housing before entering through the apertures on the lateral surfaces of the conical perforated tubular elements.
[0020] In an embodiment, the apparatus further comprises: a mixer arrangement being positioned within the interior of the housing downstream at least one substrate and comprising:
first flow guide arrangement configured to guide the exhaust gas flow to rotating and advancing gas flow in direction of a crosswise axis perpendicular to the longitudinal axis;
a reactant inlet for dispensing reactant to the rotating and advancing gas flow, the reactant configured to mix with the exhaust gas; and a second flow guide arrangement configured to guide the rotating and advancing mixed gas flow in direction of the longitudinal axis as a mixed exhaust gas flow; and a third substrate being positioned within the interior of the housing downstream to the mixer arrangement, wherein the mixed exhaust gas flow being configured to flow through the third substrate in direction of the longitudinal axis.
[0021] In an embodiment, the substrate comprises at least one of the following: a diesel oxidation catalyst (DOC) substrate; a selective catalytic reduction (SCR), and a diesel particulate filter (DPF).
[0022] According to a second example aspect of the invention there is provided a combustion engine comprising an apparatus for aftertreatment of exhaust gas of the first aspect.
[0023] Different non-binding example aspects and embodiments of the present invention have been illustrated in the foregoing. The above embodiments are used merely to explain selected aspects or steps that may be utilized in implementations of the present invention. Some embodiments may be presented only with reference to certain example aspects of the invention. It should be appreciated that corresponding embodiments may apply to other example aspects as well.
BRIEF DESCRIPTION OF THE DRAWINGS [0024] The invention will be described, by way of example only, with reference to the accompanying drawings, in which:
[0025] Fig. 1 shows a schematic picture of a system according to an example embodiment of the invention;
[0026] Figs. 2a-b show schematic pictures of an apparatus according to a first example embodiment of the invention;
[0027] Figs. 3a-c show schematic pictures of an exhaust aftertreatment apparatus according to a second example embodiment of the invention;
[0028] Figs. 4a-d show schematic pictures of an apparatus according to a third example embodiment of the invention; and [0029] Figs. 5a-b show schematic pictures of a conical perforated tubular element according to an embodiment, wherein the conical perforated tubular element is eccentric.
DETAILED DESCRIPTION [0030] In the following description, like numbers denote like elements.
[0031] Fig. 1 shows a schematic picture of a system according to an example embodiment of the invention. An engine system 100 is shown. The engine system 100 comprises an engine 110 and an exhaust aftertreatment apparatus 120. Furthermore, the system 100 may comprise other devices that are not shown in the Fig. 1. Such devices comprise, for example, a fuel storage for the engine 110 (e.g. diesel), and an air intake device including an air filter.
[0032] Fig. 1 shows a connection 115 between the engine 110 and the exhaust aftertreatment apparatus 120. The connection 115 may comprise a pipe for guiding exhaust gas from the engine 110, for example.
[0033] The exhaust aftertreatment apparatus 120 receives the exhaust gas from the engine 110 over the connection 115. In an embodiment, the apparatus 120 comprises a first substrate 121 (for example a catalytic converter, such as diesel oxidation catalyst (DOC) device and/or a second substrate, a filter, such as a diesel particulate filter (DPF), a mixer 122 and a third substrate 123 (for example a selective catalytic reduction (SCR) device). The devices 121-123 are in an embodiment implemented within the same housing of the apparatus 120 but at least one of the devices 121, 123 may also be placed outside the housing of the apparatus 120. A connection 124 for receiving reactant for the mixer 122 is also disclosed. The apparatus 120 may further comprise devices not shown in Fig. 1, such as doser for the reactant, a storage for the reactant (such as urea or ammonia), gas flow guides and connections within the apparatus 120.
[0034] First substrates 121, such as catalytic converters (diesel oxidation catalysts or DOC's) are typically used in an exhaust system to convert undesirable gases such as carbon monoxide and hydrocarbons from engine's exhaust into carbon dioxide and water. DOC's may have different configurations. The substrates used in catalytic converters preferably include a catalyst.
[0035] Another first substrates 121, such as a diesel particulate filter (DPF) may also be implemented together or alternatively to the DOC in an exhaust system to remove particulate matter (e.g., carbon based particulate matter such as soot) from the exhaust. DPF's can have a variety of known configurations.
[0036] The third substrate 123, such as the selective catalytic reduction (SCR) catalyst device is typically used in an exhaust system to remove undesirable gases such as nitrogen oxides (NOx) from the engine’s emissions. SCR's are capable of converting NOx to nitrogen and oxygen in an oxygen rich environment with the assistance of reactants such as urea or ammonia, which are injected into the exhaust gas upstream of the SCR device 123.
[0037] A mixer 122 is configured to receive exhaust gas from the engine 110 over connection 115, which gas is possibly run through a first and or a second substrate 121, such as DOC or DPF, as disclosed above. The mixer 122 receives also reactant, such as diesel exhaust fluid (DEF), over the connection 124, the reactant commonly referred to as AdBlue™ that is an aqueous urea solution made with 32.5% high-purity urea and 67.5% deionized water. DEF may be used as a consumable in selective catalytic reduction (SCR) in order to lower NOx concentration in the diesel exhaust emissions from diesel engines. The mixer 122 is configured to mix the exhaust gas and the reactant and also to reduce urea deposits in exhaust pipelines. When SCR process uses DEF, it can cause urea deposits in exhaust pipes, especially in off-road applications using airless DEF injectors. Larger DEF spray droplets might lead to wall wetting and film formation on exhaust pipe inner surfaces, causing deposits when the local temperatures are low. Urea deposit problems have become frequent and critical, and the mixer 122 is configured to keep pipelines clean by evenly distributing the reactant to the exhaust gas in the shortest possible pipe length and avoiding this way the wall wetting and film formation.
[0038] The apparatus 120 may also help water evaporation from DEF and ensures optimal reactions with the reactant with no unwanted side effects. The apparatus 120 may be used with all reactant dosers (e.g. urea or ammonia) to achieve even NH3 distribution within the exhaust gas. Further benefit is experienced with airless injectors, which have rather large Sauter mean diameter (SMD) and when the injection must start at low temperatures. An exhaust gas outlet pipe 130 guides the aftertreated exhaust gas from the apparatus 120.
[0039] In an embodiment, the apparatus 120 is configured to inject small droplets of reactant, such as urea-water solution, to the exhaust gas flow and causing the reactant to vaporize in an exhaust gas flow channel defined by interior of the housing of the apparatus housing and to react with the nitric oxides of the exhaust gas and changing them to plain nitrogen. Such final change to nitrogen takes place in SCR catalysator ofthe second substrate 123.
[0040] No matter a plurality of elements are disclosed for the exhaust aftertreatment apparatus 120, not all are essential to carry out the invention. In an embodiment, the apparatus 120 comprises a housing having a longitudinal axis that extends between a first base and a second base of the housing with a lateral surface between the first and the second base; an exhaust gas inlet being positioned on the lateral surface between the first base and the second base of the housing for entering exhaust gas flow into an interior of the housing, the exhaust gas inlet having a central axis perpendicular to the longitudinal axis of the housing; a substrate 121 being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrate 121 in direction of the longitudinal axis; a flow distribution arrangement positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the substrate 121, the flow distribution arrangement comprising a conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing; wherein the conical perforated tubular element is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the conical perforated tubular element to evenly enter the substrate 121. The central axis may be parallel to the longitudinal axis of the housing if the conical perforated tubular element is not eccentric.
[0041] Figs. 2a-c show schematic pictures of an exhaust aftertreatment apparatus 120 according to a first example embodiment of the invention.
[0042] Fig. 2a shows a view from above, wherein an exhaust gas flow 210 enters via an exhaust gas inlet 220 to an interior of the housing 230. Cross section line B-B is illustrated for Fig. 2b.
[0043] Fig. 2b shows a view from side, as a cross section B-B. An apparatus 120 for aftertreatment of exhaust gas comprises a housing 230 having a longitudinal axis that extends between a first base 231 and a second base 232 of the housing 230 with a lateral surface 233 between the first 231 and the second base 232. An exhaust gas inlet 220 is arranged on the lateral surface 233 between the first base 231 and the second base 232 of the housing 230 for entering exhaust gas flow 210 into an interior of the housing 230. The exhaust gas inlet 220 has a central axis perpendicular to the longitudinal axis of the housing 230 as illustrated in Fig. 2b.
[0044] A substrate 240 is positioned within the interior of the housing 230 downstream to the exhaust gas inlet 220, wherein the exhaust gas flow 210 is configured to flow through the substrate 240 in direction of the longitudinal axis. There may be a further substrate 241 arranged downstream to the first substrate 240.
[0045] In an embodiment, the substrate 240, 241 comprises at least one of the following:
a diesel oxidation catalyst (DOC) substrate; and a diesel particulate filter (DPF).
[0046] A flow distribution arrangement is positioned within the interior 234 of the housing 230 downstream to the exhaust gas inlet 220, and upstream to the substrate 240, 241. The flow distribution arrangement comprises a conical perforated tubular element 250 whose central axis is configured to be in a range of to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing 230 (in parallel if the conical perforated tubular element 250 is not eccentric), and the central axis of the exhaust gas inlet 220 intersects a lateral surface 233 of the housing 230. The conical perforated tubular element 250 is configured to guide the entering exhaust gas flow 210 to enter through apertures on the lateral surface of the conical perforated tubular element 250 to evenly enter the substrate 240.
[0047] In an embodiment, the conical perforated tubular element 250 comprises, as illustrated in Fig. 2b, apertures only on a portion of the lateral surface of the conical perforated tubular element 250.
[0048] In an embodiment, a portion 251 of the lateral surface of the conical perforated tubular element 250 that does not comprise apertures is arranged to the portion adjacent to the exhaust gas inlet 220 that is an upstream portion of the lateral surface of the perforated tubular element 250.
[0049] In an embodiment, a first end (upper end in Fig. 2b) of the conical perforated tubular element 250 is connected to an interior wall of the first base 231 of the housing 230.
[0050] In an embodiment, a gap (not shown in Fig. 2b) may be arranged between a first end of the conical perforated tubular element 250 and an interior wall of the first base 231 of the housing 230, wherein the exhaust gas flow 210 is allowed to flow through the gap within the interior 234 of the housing 230 before entering through the apertures on the lateral surface of the conical perforated tubular element 250.
[0051] In an embodiment, the central axis of the exhaust gas inlet 220 intersects a lateral surface of the conical perforated tubular element 250.
[0052] Fig. 2c shows a further view from top side angle. An apparatus 120 for aftertreatment of exhaust gas comprises a housing 230 having a longitudinal axis that extends between a first base 231 and a second base 232 of the housing
230 with a lateral surface 233 between the first 231 and the second base 232. An exhaust gas inlet 220 is arranged on the lateral surface 233 between the first base
231 and the second base 232 of the housing 230 for entering exhaust gas flow 210 into an interior of the housing 230. The exhaust gas inlet 220 has a central axis perpendicular to the longitudinal axis of the housing 230 as illustrated in Fig. 2c.
[0053] A flow distribution arrangement is positioned within the interior 234 of the housing 230 downstream to the exhaust gas inlet 220, and upstream to the substrate. The flow distribution arrangement comprises, as illustrated in Fig. 2c, a conical perforated tubular element 250 whose central axis is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing 230, and the central axis of the exhaust gas inlet 220 intersects a lateral surface 233 of the housing 230. The conical perforated tubular element 250 is configured to guide the entering exhaust gas flow 210 to enter through apertures on the lateral surface of the conical perforated tubular element 250 to evenly enter the substrate.
[0054] In an embodiment, the conical perforated tubular element 250 comprises, as illustrated in Fig. 2c, apertures only on a portion of the lateral surface of the conical perforated tubular element 250.
[0055] Figs. 3a-c show schematic pictures of an exhaust aftertreatment apparatus 120 according to a second example embodiment of the invention.
[0056] Fig. 3a shows a view from top side angle. An apparatus 120 for aftertreatment of exhaust gas comprises a housing 230 has a longitudinal axis that extends between a first base 231 and a second base 232 of the housing 230 with a lateral surface 233 between the first 231 and the second base 232. An exhaust gas inlet 220 is arranged on the lateral surface 233 between the first base 231 and the second base 232 of the housing 230 for entering exhaust gas flow 210 into an interior of the housing 230. The exhaust gas inlet 220 has a central axis perpendicular to the longitudinal axis of the housing 230 as illustrated in Fig. 3a.
[0057] A flow distribution arrangement is positioned within the interior 234 of the housing 230 downstream to the exhaust gas inlet 220, and upstream to the substrate. The flow distribution arrangement comprises, as illustrated in Fig. 3a, a conical perforated tubular element 250 whose central axis is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing 230, and the central axis of the exhaust gas inlet 220 intersects a lateral surface 233 of the housing 230. The conical perforated tubular element 250 is configured to guide the entering exhaust gas flow 210 to enter through apertures on the lateral surface of the conical perforated tubular element 250 to evenly enter the substrate.
[0058] In the second embodiment, the conical perforated tubular element 250 comprises apertures evenly around the whole lateral surface of the conical perforated tubular element, as illustrated in Fig. 3a.
[0059] Fig. 3b shows a view from above, wherein an exhaust gas flow 210 enters via an exhaust gas inlet 220 to an interior of the housing 230. Cross section line C-C is illustrated for Fig. 3c.
[0060] In an embodiment, the exhaust gas inlet 220 may be arranged in different positions and angles. In an example, the exhaust gas inlet is arranged tangentially. In another example, the exhaust gas inlet is arranged inclined to the lateral surface 233 of the housing 230.
[0061] Fig. 3c shows a view from side, as a cross section C-C. An apparatus 120 for aftertreatment of exhaust gas comprises a housing 230 having a longitudinal axis that extends between a first base 231 and a second base 232 of the housing 230 with a lateral surface 233 between the first 231 and the second base 232. An exhaust gas inlet 220 is arranged on the lateral surface 233 between the first base 231 and the second base 232 of the housing 230 for entering exhaust gas flow 210 into an interior of the housing 230.
[0062] In an embodiment, the exhaust gas inlet 220 has a central axis perpendicular to the longitudinal axis of the housing 230 as illustrated in Fig. 3c.
[0063] In an embodiment, the exhaust gas inlet 220 may be arranged in different positions and angles. In an example, the exhaust gas inlet 220 is arranged inclined to the lateral surface 233 of the housing 230. The exhaust gas inlet 220 may be arranged to guide the exhaust gas flow from above with inclined angle or even so that the central axis of the exhaust gas inlet 220 is parallel to the longitudinal axis of the housing 230.
[0064] In an embodiment, the exhaust gas inlet 220 is arranged vertically or horizontally inclined to the housing 230.
[0065] A substrate 240 is positioned within the interior of the housing 230 downstream to the exhaust gas inlet 220, wherein the exhaust gas flow 210 is configured to flow through the substrate 240 in direction of the longitudinal axis.
There may be a further substrate 241 arranged downstream to the first substrate 240.
[0066] In an embodiment, the substrate 240, 241 comprises at least one of the following:
a diesel oxidation catalyst (DOC) substrate; and a diesel particulate filter (DPF).
[0067] A flow distribution arrangement is positioned within the interior 234 of the housing 230 downstream to the exhaust gas inlet 220, and upstream to the substrate 240, 241. The flow distribution arrangement comprises a conical perforated tubular element 250 whose central axis is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing 230, and the central axis of the exhaust gas inlet 220 intersects a lateral surface 233 of the housing 230. The conical perforated tubular element 250 is configured to guide the entering exhaust gas flow 210 to enter through apertures on the lateral surface of the conical perforated tubular element 250 to evenly enter the substrate 240.
[0068] In the second embodiment, the conical perforated tubular element 250 comprises apertures evenly around the whole lateral surface of the conical perforated tubular element, as illustrated in Fig. 3c.
[0069] In an embodiment, a first end (upper end in Fig. 3c) of the conical perforated tubular element 250 is connected to an interior wall of the first base 231 of the housing 230.
[0070] In an embodiment, a gap (not shown in Fig. 3c) may be arranged between a first end of the conical perforated tubular element 250 and an interior wall of the first base 231 of the housing 230, wherein the exhaust gas flow 210 is allowed to flow through the gap within the interior 234 of the housing 230 before entering through the apertures on the lateral surface of the conical perforated tubular element 250.
[0071] In an embodiment, the central axis of the exhaust gas inlet 220 intersects a lateral surface of the conical perforated tubular element 250.
[0072] Figs. 4a-d show schematic pictures of an exhaust aftertreatment apparatus 120 according to a third example embodiment of the invention.
[0073] Fig. 4a shows a view from side, as a cross section A-A.
[0074] In an embodiment, the apparatus 120 further comprises, in addition to the substrate 240 as disclosed in Figs. 2-3, a second substrate 410 being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates 240, 410 in direction of the longitudinal axis.
[0075] Furthermore, a second flow distribution arrangement 450 is positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the second substrate, the second flow distribution arrangement comprising a second conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing.
[0076] The second conical perforated tubular element 450 is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the second conical perforated tubular element to evenly enter the second substrate 410.
[0077] In an embodiment, the substrates 240, 410 are positioned parallel within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates 240, 410 in direction of the longitudinal axis.
[0078] In an embodiment, at least one conical perforated tubular element 450 is eccentric so that the central axis of the conical perforated tubular element 450 is configured to be in a range of 0 to 70 degrees with respect (possibly in parallel) to the longitudinal axis of the housing but does not overlap the central axis of a substrate 240, 410 or the central axis of the housing.
[0079] Fig. 4b shows a view from above, showing a cross section line A-A. Two substrates 240, 410 are shown within an interior of the housing 430.
[0080] Fig. 4c shows another view from side. Two substrates 240, 410 are shown within an interior of the housing 430.
[0081] In the third embodiment, the exhaust gas inlet 420 has a central axis intersecting a boundary 425 between the two parallel substrates 240, 410 within the interior of the housing 430.
[0082] In an embodiment, the apparatus 120 further comprises a gap arranged between first ends of the conical perforated tubular elements and an interior wall of the first base of the housing 430, wherein the exhaust gas flow is allowed to flow within the gap within the interior of the housing before entering through the apertures on the lateral surfaces of the conical perforated tubular elements.
[0083] Figs. 5a-b show schematic pictures of a conical perforated tubular element 450 according to an embodiment, wherein the conical perforated tubular element 450 is eccentric.
[0084] Fig. 5a shows a view of an eccentric conical perforated tubular element 450 from side.
[0085] A central axis 530 of the eccentric conical perforated tubular element 450 may be defined to be a line 530 that intersects the center point 510 of the first circular open end and the center point 520 of the second circular open end. In Fig. 5a the angle of the central axis 530 of the conical perforated tubular element 450 is 70,71 degrees, as shown.
[0086] In an embodiment, the angle of the central axis 530 of the conical perforated tubular element 450 is configured to vary between 0 degrees (longitudinal axis 540 parallel to the longitudinal axis of the housing) and 70 degrees to enable optimum performance. If the angle of the central axis 530 of the conical perforated tubular element 450 exceeds 70 degrees, the performance of the overall system may decrease too much.
[0087] Fig. 5b shows a view of an eccentric conical perforated tubular element 450 from above and illustrating a central axis 530 of the eccentric conical perforated tubular element 450 that may be defined to be the line 530 that intersects the center point 510 of the first circular open end and the center point of the second circular open end. In Fig. 5b the angle of the central axis 530 of the conical perforated tubular element 450 is 70,71 degrees with respect to the longitudinal axis 540 parallel to the longitudinal axis of the housing, as shown.
[0088] In an embodiment, at least one conical perforated tubular element 450 is eccentric so that the central axis of the conical perforated tubular element 450 does not overlap the central axis of a substrate 240, 410 or the central axis of the housing.
[0089] The apparatus 120 may further comprise:
a mixer arrangement being positioned within the interior of the housing downstream at least one substrate and comprising:
first flow guide arrangement configured to guide the exhaust gas flow to rotating and advancing gas flow in direction of a crosswise axis perpendicular to the longitudinal axis;
a reactant inlet for dispensing reactant to the rotating and advancing gas flow, the reactant configured to mix with the exhaust gas; and a second flow guide arrangement configured to guide the rotating and advancing mixed gas flow in direction of the longitudinal axis as a mixed exhaust gas flow; and a third substrate being positioned within the interior of the housing downstream to the mixer arrangement, wherein the mixed exhaust gas flow being configured to flow through the third substrate in direction of the longitudinal axis.
[0090] In an embodiment, the substrate comprises at least one of the following: a diesel oxidation catalyst (DOC) substrate; a selective catalytic reduction (SCR), and a diesel particulate filter (DPF).
[0091] Some of the advantages and/or technical effects provided by embodiments of the invention comprise at least one of the following. First, a length of the apparatus may be reduced and thus ease the attachment to an engine system. Second, the exhaust gas flow entering a substrate is made more even. Third, same flow arrangement design may be used for exhaust gas flow and mixed exhaust gas flow (exhaust gas flow mixed with a reactant) and there is no dedicated reactant (e.g. ammonia or urea) concentration point within the interior of the housing or flow channel that would increase risk of urea deposits in exhaust pipelines. Fourth, turbulence of an exhaust gas flow within the arrangement is reduced.
[0092] Various embodiments have been presented. It should be appreciated that in this document, words comprise, include and contain are each used as open-ended expressions with no intended exclusivity. If desired, the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the abovedescribed functions may be optional or may be combined. Although various aspects of the invention are set out in the independent claims, other aspects of the invention comprise other combinations of features from the described embodiments and/or the dependent claims with the features of the independent claims, and not solely the combinations explicitly set out in the claims. The foregoing description has provided by way of non-limiting examples of particular implementations and embodiments of the invention a full and informative description of the best mode presently contemplated by the inventors for carrying out the invention. It is however clear to a person skilled in the art that the invention is not restricted to details of the embodiments presented above, but that it can be implemented in other embodiments using equivalent means or in different combinations of embodiments without deviating from the characteristics of the invention.
[0093] Furthermore, some of the features of the above-disclosed embodiments of this invention may be used to advantage without the corresponding use of other features. As such, the foregoing description shall be considered as merely illustrative of the principles of the present invention, and not in limitation thereof. Hence, the scope of the invention is only restricted by the appended patent claims.
Claims (18)
1. An apparatus for aftertreatment of exhaust gas comprising:
a housing having a longitudinal axis that extends between a first base and a second base of the housing with a lateral surface between the first and the second base;
an exhaust inlet being positioned on the lateral surface between the first base and the second base of the housing for entering exhaust gas flow into an interior of the housing;
a substrate being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrate in direction of the longitudinal axis;
characterized in that the apparatus further comprising: a flow distribution arrangement positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the substrate, the flow distribution arrangement comprising a conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing;
wherein the conical perforated tubular element is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the conical perforated tubular element to evenly enter the substrate.
2. The apparatus of claim 1, wherein the flow distribution arrangement comprises a conical perforated tubular element whose central axis is parallel to the longitudinal axis of the housing.
3. The apparatus of claim 1 or 2, wherein the exhaust gas inlet has a central axis perpendicular to the longitudinal axis of the housing.
4. The apparatus of any of claims 1 to 3, wherein the exhaust gas inlet is arranged tangentially to the housing.
5. The apparatus of any of claims 1 to 4, wherein the exhaust gas inlet is arranged vertically or horizontally inclined to the housing.
6. The apparatus of any of claims 1 to 5, wherein the conical perforated tubular element comprises apertures evenly around the whole lateral surface of the conical perforated tubular element.
7. The apparatus of any of claims 1 to 6, wherein the conical perforated tubular element comprises apertures only on a portion of the lateral surface of the conical perforated tubular element.
8. The apparatus of claim 7, wherein the portion of the lateral surface of the conical perforated tubular element not comprising apertures is arranged to the portion adjacent to the exhaust gas inlet.
9. The apparatus of any of claims 1 to 8, wherein a first end of the conical perforated tubular element is connected to an interior wall of the first base of the housing.
10. The apparatus of any of claims 1 to 8, further comprising a gap arranged between a first end of the conical perforated tubular element and an interior wall of the first base of the housing, wherein the exhaust gas flow is allowed to flow through the gap within the interior of the housing before entering through the apertures on the lateral surface of the conical perforated tubular element.
11. The apparatus of any of claims 1 to 10, wherein the central axis of the exhaust gas inlet intersects a lateral surface of the conical perforated tubular element.
12. The apparatus of any of claims 1 to 11, further comprising a second substrate being positioned within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates in direction of the longitudinal axis;
a second flow distribution arrangement positioned within the interior of the housing downstream to the exhaust gas inlet, and upstream to the second substrate, the second flow distribution arrangement comprising a second conical perforated tubular element whose central axis is configured to be in a range of 0 to 70 degrees with respect to the longitudinal axis of the housing, and the central axis of the exhaust gas inlet intersects a lateral surface of the housing;
wherein the second conical perforated tubular element is configured to guide the entering exhaust gas flow to enter through apertures on the lateral surface of the second conical perforated tubular element to evenly enter the second substrate.
13. The apparatus of claim 12, wherein the substrates are positioned parallel within the interior of the housing downstream to the exhaust gas inlet, wherein the exhaust gas flow being configured to flow through the substrates in direction of the longitudinal axis.
14. The apparatus of claim 13, wherein the exhaust gas inlet having a central axis intersecting a boundary between the two parallel substrates within the interior of the housing.
15. The apparatus of any of claims 12 to 14, further comprising a gap arranged between first ends of the conical perforated tubular elements and an interior wall of the first base of the housing, wherein the exhaust gas flow is allowed to flow within the gap within the interior of the housing before entering through the apertures on the lateral surfaces of the conical perforated tubular elements.
16. The apparatus of any of claims 1 to 15, further comprising:
a mixer arrangement being positioned within the interior of the housing downstream at least one substrate and comprising:
a first flow guide arrangement configured to guide the exhaust gas flow to rotating and advancing gas flow in direction of a crosswise axis perpendicular to the longitudinal axis;
a reactant inlet for dispensing reactant to the rotating and advancing gas flow, the reactant configured to mix with the exhaust gas; and a second flow guide arrangement configured to guide the rotating and advancing mixed gas flow in direction of the longitudinal axis as a mixed exhaust gas flow; and
5 a third substrate being positioned within the interior of the housing downstream to the mixer arrangement, wherein the mixed exhaust gas flow being configured to flow through the third substrate in direction of the longitudinal axis.
17. The apparatus of any of claims 1 to 16, wherein the substrate comprises at
10 least one of the following: a diesel oxidation catalyst (DOC) substrate; a selective catalytic reduction (SCR), and a diesel particulate filter (DPF).
18. A combustion engine comprising an apparatus for aftertreatment of exhaust gas of any of claims 1 to 17.
Intellectual
Property
Office
Application No: GB1622445.3 Examiner: John Twin
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1622445.3A GB2558311A (en) | 2016-12-30 | 2016-12-30 | Flow distribution arrangement for aftertreatment of exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1622445.3A GB2558311A (en) | 2016-12-30 | 2016-12-30 | Flow distribution arrangement for aftertreatment of exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201622445D0 GB201622445D0 (en) | 2017-02-15 |
| GB2558311A true GB2558311A (en) | 2018-07-11 |
Family
ID=58412239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1622445.3A Withdrawn GB2558311A (en) | 2016-12-30 | 2016-12-30 | Flow distribution arrangement for aftertreatment of exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2558311A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11698008B2 (en) | 2020-02-14 | 2023-07-11 | Tenneco Automotive Operating Company Inc. | Exhaust device |
| GB2615021A (en) * | 2020-10-22 | 2023-07-26 | Cummins Emission Solutions Inc | Exhaust gas aftertreatment system |
| US11982219B2 (en) | 2017-06-06 | 2024-05-14 | Cummins Emission Solutions Inc. | Systems and methods for mixing exhaust gases and reductant in an aftertreatment system |
| USD1042545S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| USD1042544S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| US12123337B2 (en) | 2021-03-18 | 2024-10-22 | Cummins Emission Solutions Inc. | Aftertreatment systems |
| US12188842B2 (en) | 2021-08-23 | 2025-01-07 | Cummins Emission Solutions Inc. | Outlet sampling system for aftertreatment system |
| US12264612B2 (en) | 2020-02-27 | 2025-04-01 | Cummins Emission Solutions Inc. | Mixers for use in aftertreatment systems |
| US12281605B2 (en) | 2021-07-27 | 2025-04-22 | Cummins Emision Solutions Inc. | Exhaust gas aftertreatment system |
| US12352196B2 (en) | 2021-02-02 | 2025-07-08 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment system |
| US12503969B2 (en) | 2019-12-03 | 2025-12-23 | Cummins Emission Solutions Inc. | Reductant delivery system for exhaust gas aftertreatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11982219B2 (en) | 2017-06-06 | 2024-05-14 | Cummins Emission Solutions Inc. | Systems and methods for mixing exhaust gases and reductant in an aftertreatment system |
| US12503969B2 (en) | 2019-12-03 | 2025-12-23 | Cummins Emission Solutions Inc. | Reductant delivery system for exhaust gas aftertreatment system |
| US11698008B2 (en) | 2020-02-14 | 2023-07-11 | Tenneco Automotive Operating Company Inc. | Exhaust device |
| US12264612B2 (en) | 2020-02-27 | 2025-04-01 | Cummins Emission Solutions Inc. | Mixers for use in aftertreatment systems |
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| US12352196B2 (en) | 2021-02-02 | 2025-07-08 | Cummins Emission Solutions Inc. | Exhaust gas aftertreatment system |
| US12123337B2 (en) | 2021-03-18 | 2024-10-22 | Cummins Emission Solutions Inc. | Aftertreatment systems |
| US12281605B2 (en) | 2021-07-27 | 2025-04-22 | Cummins Emision Solutions Inc. | Exhaust gas aftertreatment system |
| US12188842B2 (en) | 2021-08-23 | 2025-01-07 | Cummins Emission Solutions Inc. | Outlet sampling system for aftertreatment system |
| USD1042544S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
| USD1042545S1 (en) | 2022-04-21 | 2024-09-17 | Cummins Emission Solutions Inc. | Aftertreatment system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201622445D0 (en) | 2017-02-15 |
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| Date | Code | Title | Description |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |