WO2014055009A1 - Exhaust gas aftertreatment system and motor vehicles comprising such an aftertreatment system - Google Patents

Exhaust gas aftertreatment system and motor vehicles comprising such an aftertreatment system Download PDF

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Publication number
WO2014055009A1
WO2014055009A1 PCT/SE2013/051088 SE2013051088W WO2014055009A1 WO 2014055009 A1 WO2014055009 A1 WO 2014055009A1 SE 2013051088 W SE2013051088 W SE 2013051088W WO 2014055009 A1 WO2014055009 A1 WO 2014055009A1
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WO
WIPO (PCT)
Prior art keywords
exhaust
channel
outlet
treatment device
motor vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/SE2013/051088
Other languages
French (fr)
Inventor
Kenneth Persson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scania CV AB
Original Assignee
Scania CV AB
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 Scania CV AB filed Critical Scania CV AB
Priority to DE112013004327.0T priority Critical patent/DE112013004327T5/en
Publication of WO2014055009A1 publication Critical patent/WO2014055009A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features having thermal insulation
    • F01N13/141—Double-walled exhaust pipes or housings
    • F01N13/145—Double-walled exhaust pipes or housings with a gas other than air filling the space between both walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N2470/08—Exhaust gas passages being formed between the walls of an outer shell and an inner chamber
    • 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
    • F01N2470/22—Inlet and outlet tubes being positioned on the same side of the apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives

Definitions

  • Exhaust gas after-treatment system and motor vehicles comprising such an after-treatment system
  • the present invention relates to an exhaust after-treatment system according to the preamble of patent claim 1 .
  • invention also relates to a motor vehicle comprising such an exhaust after-treatment system.
  • a combustion engine and a cab unit with space for a driver are located in the front section of the truck. From the combustion engine, exhausts are led via an exhaust pipe to an exhaust outlet arranged at the downstream end of the exhaust pipe, from which the exhausts are emitted into the environment.
  • the exhaust outlet is located high up, and in such cases it is suitable to place the exhaust outlet just behind the cab where the part of the exhaust pipe which connects to the exhaust outlet does not obstruct the truck's body work, such as a tipper.
  • the exhaust is made to pass through an exhaust after-treatment device arranged in the exhaust pipe, which usually comprises a catalyst and a particle filter for the
  • the exhaust after-treatment device must in such a case be placed in a rear position behind the rearmost front shaft of the truck seen in the longitudinal direction, whereby the exhaust must first be led backwards from the combustion engine to the exhaust after-treatment device via a first exhaust channel , and then forwards from the exhaust after-treatment device in the direction toward the exhaust outlet via a second exhaust channel .
  • These exhaust channels may in certain cases become so bulky that they give rise to restrictions with respect to the possible bodywork options for the truck.
  • the objective of the present invention is to achieve a solution to the above mentioned problem regarding bulky exhaust after- treatment systems in motor vehicles.
  • the exhaust after-treatment system according to the invention comprises:
  • an exhaust pipe which leads exhausts from a combustion engine in a motor vehicle to an exhaust outlet which is arranged at the downstream end of the exhaust pipe to emit the exhausts into the environment
  • -an exhaust after-treatment device arranged in the exhaust pipe, showing an inlet for receipt of exhausts from the exhaust pipe and an outlet where the exhausts are emitted to the exhaust pipe after passage through the exhaust after-treatment device
  • the second exhaust channel comprises a channel section which extends along and surrounds a channel section in the first exhaust channel, whereby the direction of the exhaust flow in the said channel section of the second exhaust channel is in the opposite direction to the exhaust flow in the said channel section of the first exhaust channel.
  • the exhausts may be led in a first direction up to the exhaust after-treatment device and in the opposite, second direction away from the exhaust after-treatment device without requiring much space, for example in a truck with double front shafts which has the exhaust after-treatment device placed behind the rearmost front shaft.
  • the solution provided by the invention it is possible to maintain great flexibility with respect to the design of the bodywork of a truck with double front shafts and an exhaust outlet which is located high up and behind the cab unit, the truck being equipped with an exhaust after-treatment device which is so bulky that it must be placed behind the rearmost front shaft instead of in the space between the two front shafts.
  • the warm exhausts having passed through the exhaust after-treatment device, being brought to flow through a space surrounding the first exhaust channel arranged upstream of the exhaust after-treatment device, the cooling of the exhausts brought about by the
  • the exhaust after-treatment device will be heated quicker after a cold start, so that for example an SCR- catalyst included in an exhaust after-treatment device is heated more quickly to the operating temperature at which the SCR- catalyst starts to function efficiently.
  • the invention also pertains to a motor vehicle showing the characteristics defined in patent claim 10.
  • Fig 1 is a schematic side view of a motor vehicle equipped with an exhaust after-treatment system according to one embodiment of the present invention
  • Fig 2 id a schematic side-view of the exhaust after- treatment system in the motor vehicle according to Fig 1
  • Fig 3 is a section according to the line I II - 111 in Fig 2.
  • Fig 1 illustrates a motor vehicle 1 equipped with an exhaust after-treatment system according to one embodiment of the present invention.
  • the motor vehicle 1 comprises a vehicle frame 2, a cab unit 3 with a driver space, arranged in the front part of the motor vehicle and a truck body work 4 arranged behind the cab unit.
  • the cab unit 3 and the bodywork 4 are carried by the vehicle frame 2.
  • the motor vehicle 1 is a truck equipped with a body work 4 in the form of a tipper.
  • the exhaust after-treatment system according to the invention could however also be installed in a truck equipped with another type of body work or in another type of heavy goods vehicle.
  • the motor vehicle 1 comprises a first front shaft 5a and a second front shaft 5b, the second front shaft 5b being located behind the first front shaft 5a seen in the longitudinal direction of the motor vehicle.
  • Each of the front shafts 5a and 5b is equipped with two or more wheels 6.
  • a combustion engine 7 (see Fig 2) is located at the front end of the motor vehicle below the cab unit 3. The combustion engine 7 is located in front of the second front shaft 5b and near the first front shaft 5a.
  • Fig 2 illustrates the motor vehicle's exhaust after-treatment system 8.
  • This after-treatment system 8 comprises an exhaust pipe 10 which leads exhausts from the motor vehicle's
  • an exhaust after-treatment device 12 is connected to the exhaust pipe 10 between the combustion engine 7 and the exhaust outlet 1 1 .
  • the exhaust after-treatment device 12 is located behind the second front shaft 5b seen in the longitudinal direction of the motor vehicle, while the exhaust pipe's exhaust outlet 1 1 is located between the two front shafts 5a and 5b seen in the motor vehicle's longitudinal direction.
  • the exhaust after treatment device 12 may comprise a separate exhaust after treatment unit or a set of two or more exhaust after treatment units connected in series and/or parallel , the
  • the exhaust after-treatment device 12 includes a first exhaust after-treatment unit in the form of a catalyst 1 3, for example an SCR-catalyst, a second exhaust after-treatment unit in the form of a particle filter 14 and a silencer 15, which are schematically identified with dashed lines in Fig 2.
  • the exhaust pipe 10 includes a first exhaust channel 1 0a, through which the exhausts from the combustion engine 7 are led to the exhaust after-treatment device 12, and a second exhaust channel 10b, through which the exhausts, after their passage through the exhaust after-treatment device 12, are led from the exhaust after-treatment device to the exhaust outlet 1 1 .
  • the first exhaust channel 10a is connected, at its upstream end to an outlet 9 of the combustion engine 7. and at its downstream end to an inlet 16 of the exhaust after- treatment device 12, while the second exhaust pipe 10b is connected at its upstream end to an outlet 1 7 of the exhaust after-treatment device 12, and at its downstream end to the exhaust outlet 1 1 .
  • the second exhaust channel 10b comprises a channel section 19 which extends along and surrounds a channel section 18 in the first exhaust channel 10a, whereby the direction of the exhaust flow in the said channel section 19 of the second exhaust channel 10b is the opposite of the direction of the exhaust flows in the said channel section 18 of the first exhaust channel 10a.
  • These channel sections 18 and 19 are parallel with each other and coaxially arranged, as illustrated in Fig 2 and 3.
  • the said channel section 19 of the second exhaust channel 10b is annular when viewed in a cross- section, while the said channel section 18 of the first exhaust channel 10a is circular when viewed in a cross-section.
  • the channel sections 18 and 1 9 may also have another cross-section form, such as for example an elliptical or polygonal cross-section form .
  • the said channel section 18 in the first exhaust channel 1 0a shows an axially directed inlet 20 at its upstream end and an axially directed outlet 21 at its downstream end
  • the said channel section 19 of the second exhaust channel 10b shows a radially directed inlet 22 at its upstream end and a radially directed outlet 23 at its downstream end .
  • the second exhaust channel 10b includes another channel section 24, which is separate from the first exhaust channel 10a and which forms a connection between the exhaust after-treatment device's outlet 1 7 and the inlet 22 in the channel section 19.
  • the second exhaust channel 1 0b also includes another channel section 25, which is separate from the first exhaust channel 10a and which forms a connection between the outlet 23 in the channel section 19 and the exhaust outlet 1 1 .
  • the channel section 25 runs vertically upwards between the cab unit 3 and the truck bodywork 4 of the motor vehicle.
  • the exhaust outlet 1 1 could of course alternatively be located in another place on the motor vehicle 1 than as showed in Fig 1 and 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)

Description

Exhaust gas after-treatment system and motor vehicles comprising such an after-treatment system
FI ELD OF THE I NVENTION AND PRIOR ART
The present invention relates to an exhaust after-treatment system according to the preamble of patent claim 1 . The
invention also relates to a motor vehicle comprising such an exhaust after-treatment system.
In a conventional truck, a combustion engine and a cab unit with space for a driver are located in the front section of the truck. From the combustion engine, exhausts are led via an exhaust pipe to an exhaust outlet arranged at the downstream end of the exhaust pipe, from which the exhausts are emitted into the environment. In some trucks, it is desirable that the exhaust outlet is located high up, and in such cases it is suitable to place the exhaust outlet just behind the cab where the part of the exhaust pipe which connects to the exhaust outlet does not obstruct the truck's body work, such as a tipper. Before the exhaust is emitted into the environment via the exhaust pipe's exhaust outlet, the exhaust is made to pass through an exhaust after-treatment device arranged in the exhaust pipe, which usually comprises a catalyst and a particle filter for the
purification of the exhausts and a silencing agent which dampens the noise caused by the exhaust. Increasing demands for emission control have resulted in a need to use an after- treatment device which is so large and bulky that it no longer fits into the space between the two front shafts in a truck equipped
RECORD COFY-TRANSLATIO
(Rule 12,4) with double front shafts. The exhaust after-treatment device must in such a case be placed in a rear position behind the rearmost front shaft of the truck seen in the longitudinal direction, whereby the exhaust must first be led backwards from the combustion engine to the exhaust after-treatment device via a first exhaust channel , and then forwards from the exhaust after-treatment device in the direction toward the exhaust outlet via a second exhaust channel . These exhaust channels may in certain cases become so bulky that they give rise to restrictions with respect to the possible bodywork options for the truck.
OBJECTIVE OF THE I NVENTION
The objective of the present invention is to achieve a solution to the above mentioned problem regarding bulky exhaust after- treatment systems in motor vehicles.
SUMMARY OF TH E I NVENTION According to the present invention , the above mentioned
objective is achieved with the help of an exhaust after-treatment system with the characteristics defined in patent claim 1 .
The exhaust after-treatment system according to the invention comprises:
- an exhaust pipe which leads exhausts from a combustion engine in a motor vehicle to an exhaust outlet which is arranged at the downstream end of the exhaust pipe to emit the exhausts into the environment, -an exhaust after-treatment device arranged in the exhaust pipe, showing an inlet for receipt of exhausts from the exhaust pipe and an outlet where the exhausts are emitted to the exhaust pipe after passage through the exhaust after-treatment device,
- a first exhaust channel included in the exhaust pipe, which is connected to the exhaust after-treatment device's inlet and which is intended to receive exhausts and lead them further to the exhaust after-treatment device, and
- a second exhaust channel included in the exhaust pipe, which is connected to the exhaust after-treatment device's outlet and leads the outward-flowing exhausts from this outlet further in the direction toward the exhaust pipe's exhaust outlet.
The second exhaust channel comprises a channel section which extends along and surrounds a channel section in the first exhaust channel, whereby the direction of the exhaust flow in the said channel section of the second exhaust channel is in the opposite direction to the exhaust flow in the said channel section of the first exhaust channel. Thus, the exhausts may be led in a first direction up to the exhaust after-treatment device and in the opposite, second direction away from the exhaust after-treatment device without requiring much space, for example in a truck with double front shafts which has the exhaust after-treatment device placed behind the rearmost front shaft. Thanks to the solution provided by the invention, it is possible to maintain great flexibility with respect to the design of the bodywork of a truck with double front shafts and an exhaust outlet which is located high up and behind the cab unit, the truck being equipped with an exhaust after-treatment device which is so bulky that it must be placed behind the rearmost front shaft instead of in the space between the two front shafts. By virtue of the warm exhausts, having passed through the exhaust after-treatment device, being brought to flow through a space surrounding the first exhaust channel arranged upstream of the exhaust after-treatment device, the cooling of the exhausts brought about by the
surrounding air in the first exhaust channel will be counteracted by the heat of the exhausts which flow through the said
surrounding space. Thus, the exhaust after-treatment device will be heated quicker after a cold start, so that for example an SCR- catalyst included in an exhaust after-treatment device is heated more quickly to the operating temperature at which the SCR- catalyst starts to function efficiently.
Other favourable features of the exhaust after-treatment system according to the invention are set out in the non-independent patent claims and in the description below.
The invention also pertains to a motor vehicle showing the characteristics defined in patent claim 10. BRI EF DESCRI PTION OF THE DRAWI NGS
The invention is described below with the help of example embodiments, with reference to the enclosed drawings. Exhibited in :
Fig 1 is a schematic side view of a motor vehicle equipped with an exhaust after-treatment system according to one embodiment of the present invention , Fig 2 id a schematic side-view of the exhaust after- treatment system in the motor vehicle according to Fig 1 , and Fig 3 is a section according to the line I II - 111 in Fig 2.
DETAI LED DESCRIPTION OF EMBODIMENTS ACCORDING TO THE I NVENTION Fig 1 illustrates a motor vehicle 1 equipped with an exhaust after-treatment system according to one embodiment of the present invention. The motor vehicle 1 comprises a vehicle frame 2, a cab unit 3 with a driver space, arranged in the front part of the motor vehicle and a truck body work 4 arranged behind the cab unit. The cab unit 3 and the bodywork 4 are carried by the vehicle frame 2. In the illustrated example, the motor vehicle 1 is a truck equipped with a body work 4 in the form of a tipper. The exhaust after-treatment system according to the invention could however also be installed in a truck equipped with another type of body work or in another type of heavy goods vehicle.
In the illustrated example, the motor vehicle 1 comprises a first front shaft 5a and a second front shaft 5b, the second front shaft 5b being located behind the first front shaft 5a seen in the longitudinal direction of the motor vehicle. Each of the front shafts 5a and 5b is equipped with two or more wheels 6. A combustion engine 7 (see Fig 2) is located at the front end of the motor vehicle below the cab unit 3. The combustion engine 7 is located in front of the second front shaft 5b and near the first front shaft 5a. Fig 2 illustrates the motor vehicle's exhaust after-treatment system 8. This after-treatment system 8 comprises an exhaust pipe 10 which leads exhausts from the motor vehicle's
combustion engine 7 to an exhaust outlet 1 1 , which is located at the downstream end of the exhaust pipe and via which the exhausts are emitted into the environment. An exhaust after- treatment device 12 is connected to the exhaust pipe 10 between the combustion engine 7 and the exhaust outlet 1 1 . I n the illustrated example, the exhaust after-treatment device 12 is located behind the second front shaft 5b seen in the longitudinal direction of the motor vehicle, while the exhaust pipe's exhaust outlet 1 1 is located between the two front shafts 5a and 5b seen in the motor vehicle's longitudinal direction.
The exhaust after treatment device 12 may comprise a separate exhaust after treatment unit or a set of two or more exhaust after treatment units connected in series and/or parallel , the
respective exhaust after-treatment units consisting of for example a catalyst or a particle filter. The exhaust after- treatment device 12 may also comprise silencers in order to dampen the noise caused by the exhausts. I n the illustrated example, the exhaust after-treatment device 12 includes a first exhaust after-treatment unit in the form of a catalyst 1 3, for example an SCR-catalyst, a second exhaust after-treatment unit in the form of a particle filter 14 and a silencer 15, which are schematically identified with dashed lines in Fig 2.
The exhaust pipe 10 includes a first exhaust channel 1 0a, through which the exhausts from the combustion engine 7 are led to the exhaust after-treatment device 12, and a second exhaust channel 10b, through which the exhausts, after their passage through the exhaust after-treatment device 12, are led from the exhaust after-treatment device to the exhaust outlet 1 1 . In the illustrated example, the first exhaust channel 10a is connected, at its upstream end to an outlet 9 of the combustion engine 7. and at its downstream end to an inlet 16 of the exhaust after- treatment device 12, while the second exhaust pipe 10b is connected at its upstream end to an outlet 1 7 of the exhaust after-treatment device 12, and at its downstream end to the exhaust outlet 1 1 .
The second exhaust channel 10b comprises a channel section 19 which extends along and surrounds a channel section 18 in the first exhaust channel 10a, whereby the direction of the exhaust flow in the said channel section 19 of the second exhaust channel 10b is the opposite of the direction of the exhaust flows in the said channel section 18 of the first exhaust channel 10a. These channel sections 18 and 19 are parallel with each other and coaxially arranged, as illustrated in Fig 2 and 3.
In the illustrated embodiment, the said channel section 19 of the second exhaust channel 10b is annular when viewed in a cross- section, while the said channel section 18 of the first exhaust channel 10a is circular when viewed in a cross-section. The channel sections 18 and 1 9 may also have another cross-section form, such as for example an elliptical or polygonal cross-section form . In the illustrated embodiment the said channel section 18 in the first exhaust channel 1 0a shows an axially directed inlet 20 at its upstream end and an axially directed outlet 21 at its downstream end, while the said channel section 19 of the second exhaust channel 10b shows a radially directed inlet 22 at its upstream end and a radially directed outlet 23 at its downstream end . In the illustrated embodiment the second exhaust channel 10b includes another channel section 24, which is separate from the first exhaust channel 10a and which forms a connection between the exhaust after-treatment device's outlet 1 7 and the inlet 22 in the channel section 19. The second exhaust channel 1 0b also includes another channel section 25, which is separate from the first exhaust channel 10a and which forms a connection between the outlet 23 in the channel section 19 and the exhaust outlet 1 1 . In the illustrated example, the channel section 25 runs vertically upwards between the cab unit 3 and the truck bodywork 4 of the motor vehicle. The exhaust outlet 1 1 could of course alternatively be located in another place on the motor vehicle 1 than as showed in Fig 1 and 2.
The invention is not limited in any way to the embodiments described above, but numerous possible modifications thereof should be obvious to a person skilled in the area, without such person departing from the spirit of the invention as defined by the appended patent claims.

Claims

PATENT CLAI MS
1 . Exhaust after-treatment system for a motor vehicle
comprising:
- an exhaust pipe ( 10) which leads exhausts from a
combustion engine in a motor vehicle to an exhaust outlet ( 1 1 ) which is arranged at the downstream end of the exhaust pipe to emit the exhausts into the environment,
- an exhaust after-treatment device ( 12) arranged in the exhaust pipe ( 10), which shows an inlet ( 16) for the receipt of exhausts from the exhaust pipe and an outlet ( 1 7) for emitting the exhausts into the exhaust pipe after their passage through the exhaust after-treatment device,
- a first exhaust channel ( 10a) included in the exhaust pipe ( 10), which is connected to the exhaust after-treatment device's inlet ( 16) and which is intended to receive exhausts and lead them further to the exhaust after-treatment device ( 12), and
- a second exhaust channel ( 10b) included in the exhaust pipe ( 10), which is connected to the exhaust after-treatment device's outlet ( 1 7) and leads the outward-flowing exhausts from this outlet further in the direction toward the exhaust pipe's exhaust outlet ( 1 1 ),
characterised by the second exhaust channel ( 10b)
comprising a channel section ( 19) which extends along and surrounds a channel section ( 18) in the first exhaust channel ( 10a), whereby the direction of the exhaust flow in the said channel section ( 19) of the second exhaust channel ( 10b) is opposite to the direction of the flow of exhausts in the said channel section ( 1 8) of the first exhaust channel ( 10a).
2. Exhaust after-treatment system according to claim 1 ,
characterised by the exhaust after-treatment device ( 12) comprising a silencer ( 15) for dampening of noise caused by the exhausts.
3. Exhaust after-treatment system according to claim 1 or 2,
characterised by the exhaust after-treatment device ( 12) comprising a catalyst ( 13) and/or a particle filter ( 14).
4. Exhaust after-treatment system according to any of claims 1 -3, characterised by said channel section ( 19) in the second exhaust channel ( 10b) being annular seen in a cross-section .
5. Exhaust after-treatment system according to any of the claims 1 -4, characterised by said channel section ( 19) in the second exhaust channel ( 1 0b) having a radially directed outlet (23) at its downstream end .
6. Exhaust after-treatment system according to any of claims 1 -5, characterised by said channel section ( 19) in the second exhaust channel ( 10b) having a radially directed inlet (22) at its upstream end .
7. Exhaust after-treatment system according to claim 6,
characterised by the second exhaust channel ( 1 0b)
comprising another channel section (24), which is separate from the first exhaust channel ( 10a) and which forms a connection between the exhaust after-treatment device's outlet ( 17) and the inlet (22) of the above mentioned channel section ( 19) in the second exhaust channel ( 1 0b).
8. Exhaust after-treatment system according to any of claims 1 -7, characterised by said channel section ( 18) in the first exhaust channel ( 10a) having an axially directed inlet (20) at its upstream end.
Exhaust after-treatment system according to any of claims 1 -8, characterised by said channel section ( 18) in the first exhaust channel ( 10a) having an axially directed outlet (21 ) at its downstream end.
10. Motor vehicle including a combustion engine (7),
characterised by an exhaust after-treatment system (8) according to any of claims 1 -9 being connected to the
combustion engine (7).
1 1 . Motor vehicle according to claim 10, characterised by :
- the motor vehicle ( 1 ) comprising a first front shaft (5a) and a second front shaft (5b), the second front shaft (5b) being located behind the first front shaft (5a) seen in the longitudinal direction of the motor vehicle,
- the combustion engine (7) being located at the motor vehicle's front end in front of the second front shaft (5b),
- said exhaust after-treatment device ( 12) being located behind the second front shaft (5b) seen in the longitudinal direction of the motor vehicle, and - the exhaust pipe's exhaust outlet ( 1 1 ) being located in front of the second front shaft (5b) seen in the longitudinal direction of the motor vehicle.
PCT/SE2013/051088 2012-10-03 2013-09-18 Exhaust gas aftertreatment system and motor vehicles comprising such an aftertreatment system Ceased WO2014055009A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112013004327.0T DE112013004327T5 (en) 2012-10-03 2013-09-18 Exhaust after-treatment system and motor vehicles comprising such an after-treatment system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1251115-0 2012-10-03
SE1251115A SE537805C2 (en) 2012-10-03 2012-10-03 Motor vehicles comprising an exhaust after-treatment device

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JP7550677B2 (en) * 2021-02-25 2024-09-13 株式会社小松製作所 Dump truck

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DE102009056183A1 (en) * 2009-11-27 2011-06-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust gas purification component with deflection surface and method for its production
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WO2010032518A1 (en) * 2008-09-18 2010-03-25 いすゞ自動車株式会社 Exhaust gas purifying device and exhaust gas purifying method
DE102009056183A1 (en) * 2009-11-27 2011-06-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Exhaust gas purification component with deflection surface and method for its production
DE102010034705A1 (en) * 2010-08-18 2012-02-23 Emitec Gesellschaft Für Emissionstechnologie Mbh Compact exhaust treatment unit with addition of reactant

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