EP1596044B1 - Device for exhaust gas treatment - Google Patents
Device for exhaust gas treatment Download PDFInfo
- Publication number
- EP1596044B1 EP1596044B1 EP05103766A EP05103766A EP1596044B1 EP 1596044 B1 EP1596044 B1 EP 1596044B1 EP 05103766 A EP05103766 A EP 05103766A EP 05103766 A EP05103766 A EP 05103766A EP 1596044 B1 EP1596044 B1 EP 1596044B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casing
- pipe connection
- exhaust gas
- outlet aperture
- aperture
- 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.)
- Revoked
Links
- 239000007789 gas Substances 0.000 claims abstract description 71
- 238000002485 combustion reaction Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 17
- 238000013016 damping Methods 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Images
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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
-
- 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
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers 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
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
Definitions
- the present invention relates to a device for exhaust gas treatment according to the preamble of claim 1.
- Exhaust gas treatment devices intended to be arranged in an exhaust system of a combustion engine are previously known in a multiplicity of different forms.
- Such an exhaust gas treatment device usually comprises a casing with an inlet aperture for receiving exhaust gases and an outlet aperture for exhaust gases, and a passage extending inside the casing to guide the exhaust gases between the inlet aperture and the outlet aperture.
- the exhaust gases are brought into contact with means arranged inside the casing for damping of the low-frequency noise caused by the exhaust gases, and/or means for cleaning of the exhaust gases, e.g. one or more catalysts for effecting catalytic conversion of environmentally dangerous components of the exhaust gases to environmentally less dangerous substances, and/or one or more particle filters for removing particulate components from the exhaust gases.
- An exhaust gas treatment device is previously known, e.g. from SE 520 350 C2 .
- That exhaust gas treatment device comprises a substantially cylindrical casing with an inlet aperture arranged in the shell surface of the casing and an outlet aperture arranged in an endwall of the casing.
- the inside of the casing is provided with means for noise damping and means for cleaning the exhaust gases. That exhaust gas treatment device is thus designed to effect both noise damping and exhaust gas cleaning.
- An exhaust gas treatment device is also previously known from GB 2 212 771 A .
- That exhaust gas treatment device comprises a cylindrical casing with an inlet aperture and an outlet aperture arranged in the shell surface of the casing.
- the inside of the casing is provided with means for noise damping.
- That exhaust gas treatment device thus constitutes a silencer.
- the casing is fastened in a retainer which allows rotation of the casing relative to the combustion engine at the time of fitting the casing to the combustion engine.
- an exhaust gas treatment device of the type concerned to a heavy motor vehicle e.g. in the form of a truck or trailer
- the exhaust gas treatment device being placed with the longitudinal axis of the casing extending substantially parallel with or substantially perpendicular to the longitudinal axis of the motor vehicle.
- the exhaust gases from the motor vehicle's combustion engine are released into the open air downwards under the motor vehicle, to the right of the motor vehicle, to the left of the motor vehicle or vertically upwards.
- the exhaust line between the exhaust gas treatment device and the exhaust system outlet has therefore to be routed differently depending on the desired location and direction of the exhaust system outlet.
- An exhaust gas treatment unit according to the preamble of claim 1 is previously known from US 2003/0108457 A1 .
- the object of the present invention is to provide an exhaust gas treatment device of the type indicated in the introduction which affords greater flexibility in the design and fitting of an associated exhaust system and simplifies the adaptation of the exhaust system to the desired location and direction of the exhaust system outlet.
- the device comprises a pipe connection which has an outlet aperture and an inlet aperture which is connected or connectable to the outlet aperture of the casing, which pipe connection is fastened or fastenable to the casing and settable at different rotational positions relative to the casing in order to regulate the direction of the outlet aperture of the pipe connection relative to the casing.
- the direction of the outlet of the exhaust gas treatment device can thus be varied without altering the location or orientation of the casing, thereby making it particularly easy to give the outlet of the exhaust gas treatment device a direction which is favourable with regard to the desired location and direction of the exhaust system outlet.
- the possibility of varying the direction of the outlet of the exhaust gas treatment device according to the invention makes it possible in many cases to make the exhaust line between the exhaust gas treatment device and exhaust system outlet straighter and occupy less space than would be possible when using a conventional design of exhaust gas treatment device with a fixed outlet direction.
- a straighter and shorter exhaust line is less expensive to manufacture and fit and at the same time reduces the risk of damage to the exhaust line.
- the pipe connection comprises a contact surface intended to engage with a corresponding contact surface of the casing or of a component arranged in the casing, said contact surfaces being so designed that the pipe connection is rotatable relative to the casing when the contact surfaces are in mutual engagement.
- the device 1 is intended to be arranged in an exhaust system of a combustion engine in order to effect damping of the low-frequency noise caused by the exhaust gases and/or to effect cleaning of the exhaust gases.
- the device comprises a casing 2 with an inlet aperture 3 for receiving exhaust gases arising from the combustion engine, and an outlet aperture 4 for departure of exhaust gases after they have passed through the casing.
- a passage 5 is arranged for guiding the exhaust gases between the inlet aperture 3 and the outlet aperture 4.
- the passage 5 extending between the inlet aperture 3 and the outlet aperture 4 is provided inside with means 6 for damping of noise caused by the exhaust gases, and/or means 7 for cleaning the exhaust gases.
- These latter means 7 may comprise one or more catalysts for effecting catalyst conversion of environmentally dangerous components of the exhaust gases to environmentally less dangerous substances, and/or one or more particle filters for removing particulate components from the exhaust gases.
- the casing 2 constitutes a closed external surface except at the points where the inlet aperture 3 and the outlet aperture 4 are arranged.
- the device 1 comprises a pipe connection 8 which has an outlet aperture 10 and an inlet aperture 9 which is connected or connectable to the outlet aperture 4 of the casing.
- the pipe connection 8 is fastened or fastenable to the casing 2 and settable at various rotational positions relative to the casing 2 in order to regulate the direction of the outlet aperture 10 of the pipe connection relative to the casing 2.
- the pipe connection 8 has a contact surface 11 intended to engage with a corresponding contact surface 12 of a component 13 arranged in the casing (see Fig. 4), said contact surfaces 11, 12 being designed to enable the pipe connection 12 to be rotated relative to the casing 2 when the contact surfaces 11, 12 are in mutual engagement. Said contact surfaces 11, 12 are preferably rotationally symmetrical.
- the pipe connection 8 may be steplessly rotatable relative to the casing 2 or alternatively be rotatable between various predetermined setting positions relative to the casing.
- the pipe connection 8 and the casing 2 have mutually engaging portions 14 of polygonal cross-sectional shape, e.g. square cross-sectional shape as illustrated in Fig. 7.
- a square cross-sectional shape of the engaging portions 14 concerned provides four different rotational positions of the pipe connection 8 relative to the casing 2.
- changing the rotational position of the pipe connection relative to the casing involves the pipe connection 8 being removed from the casing 2 and being returned to engagement with the casing after being rotated relative to the casing 2.
- the pipe connection 8 is with advantage clamped firmly to the casing 2 by a clamping means 15.
- the clamping means 15 takes the form of a clamp ring, advantageously of V-shaped or U-shaped cross-section, arranged to engage with the pipe connection 8 externally about a flange 16 extending round the pipe connection's inlet aperture 9.
- the pipe connection's flange 16 is arranged to engage via its outside with the clamp ring 15 and via its inside with a corresponding flange 17 of a component 13 arranged in the casing 2 (see Fig. 4).
- the aforesaid contact surface 11 of the pipe connection is thus arranged on the inside of the pipe connection's flange, while the corresponding contact surface 12 of the component is arranged on the outside of the flange 17 of the component.
- the device 1 comprises a component 13 in the form of an exhaust gas cleaning unit fitted detachably inside the casing 2 and insertable in the casing 2 via the casing's outlet aperture 4.
- the clamping means 15 is arranged to clamp the pipe connection 8 firmly to the casing 2 by firmly clamping a flange 16 of the pipe connection and a flange 20 of the casing to a corresponding flange 17 of the exhaust gas cleaning unit 13.
- the clamping means 15 has two mutually opposite flanges 21, 22, whereby the one flange 21 engages externally about the pipe connection's flange 16 and the other flange 22 engages externally about the casing's flange 20 and clamps these flanges 16, 20 firmly to the exhaust gas cleaning unit's flange 17 situated under them. It thus becomes possible to use a single clamping means 15 to clamp both the pipe connection 8 and the exhaust gas cleaning unit 13 firmly to the casing 2.
- the exhaust gas cleaning unit 13 comprises preferably a catalyst but might also comprise a particle filter or a catalyst in combination with a particle filter.
- the casing 2 is substantially cylindrical and the casing's outlet aperture 4 is arranged in an endwall 23a of the casing, whereby the pipe connection 8 when fastened to the casing is arranged to protrude from this endwall.
- the pipe connection's inlet aperture 9 has a centreline which substantially coincides with or is substantially parallel with the casing's centreline 24a.
- the pipe connection's outlet aperture 10 is arranged to be directed away from the casing's centreline 24a when the pipe connection is fastened to the casing.
- the pipe connection's outlet aperture 10 thus has a centreline 24b which extends at an angle relative to the casing's centreline 24a when the pipe connection is fastened to the casing.
- the centreline 24b of the pipe connection's outlet aperture 10 consequently extends likewise at an angle relative to the centreline of the pipe connection's inlet aperture 9.
- the casing's inlet aperture 3 is with advantage arranged in the casing's shell surface 25. If advantageous, elements 26 made of thermally insulating material may be arranged on the outside of the casing, as illustrated in Fig. 3.
- a cylindrical pipe 27 is arranged inside the casing 2 in such a way that the pipe's centreline substantially coincides with the casing's centreline 24a.
- This pipe 27 extends from the endwall 23a provided with the outlet aperture 4 to a module 28 which comprises a second endwall 23b of the casing 2.
- the module 28 is advantageously fastened detachably to the remainder of casing 2 by a clamping means 29 in the form of a clamp ring.
- the aforesaid exhaust gas cleaning unit 13 is fitted inside the pipe 27.
- the passage 5 between the casing's inlet aperture and outlet aperture comprises a first part-section 5a situated between the casing 2 and the pipe 27, i.e. externally about the pipe 27.
- the first part-section 5a is connected by a second part-section 5b situated in the module 28 to a third part-section 5c situated internally in the pipe 27.
- the casing's inlet aperture 3 is connected to the first part-section 5a and the casing's outlet aperture 4 is connected to the third part-section 5c so that the exhaust gases received by the device are caused to flow successively through the first part-section 5a, the second part-section 5b and the third part-section 5c.
- the greater part of the noise caused by the exhaust gases from a combustion engine comprises low-frequency noise.
- a basic principle for damping low-frequency noise arising from exhaust gases is to lead the exhaust gases through a long line between two spaces.
- the device 1 illustrated comprises noise-damping means 6 constructed according to this principle. Between a first space constituted by the passage's first part-section 5a and a second space constituted by the passage's third part-section 5c, the exhaust gases are led in a spiral flowpath 30 into the passage's second part-section 5b, as illustrated in Figs. 3 and 5. This spiral flowpath leads the exhaust gases radially inwards towards the casing's centreline 24a from the first part-section 5a to the third part-section 5c.
- a particle filter (not depicted) may be arranged in the first part-section 5a of the passage 5, i.e. in the space between the pipe 27 and the casing 2.
- the device 1 according to the invention is particularly intended to be fitted to a heavy motor vehicle, e.g. in the form of a truck or trailer, in order to treat exhaust gases from the motor vehicle's combustion engine.
- the device 1 is normally positioned with the longitudinal axis of the casing extending substantially parallel with or substantially perpendicular to the motor vehicle's longitudinal axis.
- Figs. 8 and 9 illustrate a device 1 according to the present invention, fitted to a member 40 forming part of the frame of a motor vehicle.
- the member 40 illustrated is conceived as extending in the longitudinal direction of the motor vehicle.
- FIG. 8 illustrates how the device 1 is suspended by means of a bracket relative to the member 40 concerned, with the longitudinal axis of the casing 2 extending substantially perpendicular to the longitudinal direction of the member, i.e. substantially perpendicular to the longitudinal axis of the motor vehicle.
- Fig. 9 illustrates how the device 1 is suspended by means of a bracket 42 relative to the member 40 concerned, with the longitudinal axis of the casing 2 extending substantially parallel with the longitudinal direction of the member, i.e. substantially parallel with the longitudinal axis of the motor vehicle.
- the passage 5 and the noise-damping means 6 may be designed differently from what is here illustrated.
- the design of the casing 2 may also be different both internally and externally from what is here illustrated.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Silencers (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Valve Device For Special Equipments (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
- The present invention relates to a device for exhaust gas treatment according to the preamble of claim 1.
- Exhaust gas treatment devices intended to be arranged in an exhaust system of a combustion engine are previously known in a multiplicity of different forms. Such an exhaust gas treatment device usually comprises a casing with an inlet aperture for receiving exhaust gases and an outlet aperture for exhaust gases, and a passage extending inside the casing to guide the exhaust gases between the inlet aperture and the outlet aperture. As they pass between the inlet aperture and outlet aperture of the casing, the exhaust gases are brought into contact with means arranged inside the casing for damping of the low-frequency noise caused by the exhaust gases, and/or means for cleaning of the exhaust gases, e.g. one or more catalysts for effecting catalytic conversion of environmentally dangerous components of the exhaust gases to environmentally less dangerous substances, and/or one or more particle filters for removing particulate components from the exhaust gases.
- An exhaust gas treatment device is previously known, e.g. from
SE 520 350 C2 - An exhaust gas treatment device is also previously known from
GB 2 212 771 A - Fitting an exhaust gas treatment device of the type concerned to a heavy motor vehicle, e.g. in the form of a truck or trailer, normally involves the exhaust gas treatment device being placed with the longitudinal axis of the casing extending substantially parallel with or substantially perpendicular to the longitudinal axis of the motor vehicle. Depending on whether the motor vehicle is adapted to left-hand or right-hand driving and various legal requirements and market requirements, the exhaust gases from the motor vehicle's combustion engine are released into the open air downwards under the motor vehicle, to the right of the motor vehicle, to the left of the motor vehicle or vertically upwards. The exhaust line between the exhaust gas treatment device and the exhaust system outlet has therefore to be routed differently depending on the desired location and direction of the exhaust system outlet.
- An exhaust gas treatment unit according to the preamble of claim 1 is previously known from
US 2003/0108457 A1 . - The object of the present invention is to provide an exhaust gas treatment device of the type indicated in the introduction which affords greater flexibility in the design and fitting of an associated exhaust system and simplifies the adaptation of the exhaust system to the desired location and direction of the exhaust system outlet.
- According to the present invention, said object is achieved by means of a device exhibiting the features indicated in claim 1. According to the invention, the device comprises a pipe connection which has an outlet aperture and an inlet aperture which is connected or connectable to the outlet aperture of the casing, which pipe connection is fastened or fastenable to the casing and settable at different rotational positions relative to the casing in order to regulate the direction of the outlet aperture of the pipe connection relative to the casing. The direction of the outlet of the exhaust gas treatment device can thus be varied without altering the location or orientation of the casing, thereby making it particularly easy to give the outlet of the exhaust gas treatment device a direction which is favourable with regard to the desired location and direction of the exhaust system outlet. The possibility of varying the direction of the outlet of the exhaust gas treatment device according to the invention makes it possible in many cases to make the exhaust line between the exhaust gas treatment device and exhaust system outlet straighter and occupy less space than would be possible when using a conventional design of exhaust gas treatment device with a fixed outlet direction. A straighter and shorter exhaust line is less expensive to manufacture and fit and at the same time reduces the risk of damage to the exhaust line.
- According to a preferred embodiment of the invention, the pipe connection comprises a contact surface intended to engage with a corresponding contact surface of the casing or of a component arranged in the casing, said contact surfaces being so designed that the pipe connection is rotatable relative to the casing when the contact surfaces are in mutual engagement. This makes it easy to arrange the pipe connection in a desired rotational position relative to the casing by rotating the pipe connection relative to the casing without having to remove the pipe connection from the casing.
- Further preferred embodiments of the device according to the invention are indicated by the dependent claims and the description set out below.
- The invention is described below in more detail with reference to examples of embodiments and the attached drawings, which are as follows:
- Fig. 1 a
- a perspective view of a device according to a first embodiment of the present invention, with a pipe connection arranged in a first rotational position,
- Fig. 1 b
- a perspective view of part of the device according to Fig. 1 a, with the pipe connection arranged in a second rotational position,
- Fig. 1 c
- a perspective view of part of the device according to Fig. 1 a, with the pipe connection arranged in a third rotational position,
- Fig. 2
- an exploded view of the device according to Fig. 1 a, with an associated outlet pipe,
- Fig. 3
- a longitudinal section of the device according to Fig. 1 a,
- Fig. 4
- an enlarged detail illustrating a first alternative for fitting a pipe connection to a casing of a device according to the invention,
- Fig. 5
- a section through A-A in Fig. 3,
- Fig. 6
- an enlarged detail illustrating an alternative for fitting a pipe connection to a casing of a device not forming part of the present invention,
- Fig. 7
- a perspective view of part of a device according to a second embodiment of the invention,
- Fig. 8
- a perspective view illustrating a first alternative for fitting a device according to the invention to the frame of a motor vehicle, and
- Fig. 9
- a perspective view illustrating a second alternative for fitting a device according to the invention to the frame of a motor vehicle.
- The device 1 according to the invention is intended to be arranged in an exhaust system of a combustion engine in order to effect damping of the low-frequency noise caused by the exhaust gases and/or to effect cleaning of the exhaust gases. The device comprises a
casing 2 with aninlet aperture 3 for receiving exhaust gases arising from the combustion engine, and anoutlet aperture 4 for departure of exhaust gases after they have passed through the casing. Inside thecasing 2, a passage 5 is arranged for guiding the exhaust gases between theinlet aperture 3 and theoutlet aperture 4. The passage 5 extending between theinlet aperture 3 and theoutlet aperture 4 is provided inside withmeans 6 for damping of noise caused by the exhaust gases, and/or means 7 for cleaning the exhaust gases. These latter means 7 may comprise one or more catalysts for effecting catalyst conversion of environmentally dangerous components of the exhaust gases to environmentally less dangerous substances, and/or one or more particle filters for removing particulate components from the exhaust gases. Thecasing 2 constitutes a closed external surface except at the points where theinlet aperture 3 and theoutlet aperture 4 are arranged. - According to the invention, the device 1 comprises a
pipe connection 8 which has anoutlet aperture 10 and aninlet aperture 9 which is connected or connectable to theoutlet aperture 4 of the casing. Thepipe connection 8 is fastened or fastenable to thecasing 2 and settable at various rotational positions relative to thecasing 2 in order to regulate the direction of theoutlet aperture 10 of the pipe connection relative to thecasing 2. - In the embodiments illustrated in Figs. 1-5, the
pipe connection 8 has a contact surface 11 intended to engage with acorresponding contact surface 12 of acomponent 13 arranged in the casing (see Fig. 4), saidcontact surfaces 11, 12 being designed to enable thepipe connection 12 to be rotated relative to thecasing 2 when thecontact surfaces 11, 12 are in mutual engagement. Saidcontact surfaces 11, 12 are preferably rotationally symmetrical. Thepipe connection 8 may be steplessly rotatable relative to thecasing 2 or alternatively be rotatable between various predetermined setting positions relative to the casing. According to an alternative embodiment, thepipe connection 8 and thecasing 2 have mutually engagingportions 14 of polygonal cross-sectional shape, e.g. square cross-sectional shape as illustrated in Fig. 7. It may be seen that, for example, a square cross-sectional shape of the engagingportions 14 concerned provides four different rotational positions of thepipe connection 8 relative to thecasing 2. In this alternative embodiment, changing the rotational position of the pipe connection relative to the casing involves thepipe connection 8 being removed from thecasing 2 and being returned to engagement with the casing after being rotated relative to thecasing 2. - The
pipe connection 8 is with advantage clamped firmly to thecasing 2 by a clamping means 15. The clamping means 15 takes the form of a clamp ring, advantageously of V-shaped or U-shaped cross-section, arranged to engage with thepipe connection 8 externally about aflange 16 extending round the pipe connection'sinlet aperture 9. The pipe connection'sflange 16 is arranged to engage via its outside with theclamp ring 15 and via its inside with a corresponding flange 17 of acomponent 13 arranged in the casing 2 (see Fig. 4). In this case the aforesaid contact surface 11 of the pipe connection is thus arranged on the inside of the pipe connection's flange, while thecorresponding contact surface 12 of the component is arranged on the outside of the flange 17 of the component. - The device 1 comprises a
component 13 in the form of an exhaust gas cleaning unit fitted detachably inside thecasing 2 and insertable in thecasing 2 via the casing'soutlet aperture 4. In this case the clamping means 15 is arranged to clamp thepipe connection 8 firmly to thecasing 2 by firmly clamping aflange 16 of the pipe connection and aflange 20 of the casing to a corresponding flange 17 of the exhaustgas cleaning unit 13. In the embodiment illustrated in Fig. 4, the clamping means 15 has two mutuallyopposite flanges flange 21 engages externally about the pipe connection'sflange 16 and theother flange 22 engages externally about the casing'sflange 20 and clamps theseflanges pipe connection 8 and the exhaustgas cleaning unit 13 firmly to thecasing 2. The exhaustgas cleaning unit 13 comprises preferably a catalyst but might also comprise a particle filter or a catalyst in combination with a particle filter. - In the embodiments illustrated, the
casing 2 is substantially cylindrical and the casing'soutlet aperture 4 is arranged in anendwall 23a of the casing, whereby thepipe connection 8 when fastened to the casing is arranged to protrude from this endwall. In this case the pipe connection'sinlet aperture 9 has a centreline which substantially coincides with or is substantially parallel with the casing'scentreline 24a. The pipe connection'soutlet aperture 10 is arranged to be directed away from the casing'scentreline 24a when the pipe connection is fastened to the casing. The pipe connection'soutlet aperture 10 thus has a centreline 24b which extends at an angle relative to the casing'scentreline 24a when the pipe connection is fastened to the casing. The centreline 24b of the pipe connection'soutlet aperture 10 consequently extends likewise at an angle relative to the centreline of the pipe connection'sinlet aperture 9. The casing'sinlet aperture 3 is with advantage arranged in the casing'sshell surface 25. If advantageous,elements 26 made of thermally insulating material may be arranged on the outside of the casing, as illustrated in Fig. 3. - In the embodiment illustrated in Fig. 3, a
cylindrical pipe 27 is arranged inside thecasing 2 in such a way that the pipe's centreline substantially coincides with the casing'scentreline 24a. Thispipe 27 extends from theendwall 23a provided with theoutlet aperture 4 to amodule 28 which comprises a second endwall 23b of thecasing 2. Themodule 28 is advantageously fastened detachably to the remainder ofcasing 2 by a clamping means 29 in the form of a clamp ring. The aforesaid exhaustgas cleaning unit 13 is fitted inside thepipe 27. The passage 5 between the casing's inlet aperture and outlet aperture comprises a first part-section 5a situated between thecasing 2 and thepipe 27, i.e. externally about thepipe 27. The first part-section 5a is connected by a second part-section 5b situated in themodule 28 to a third part-section 5c situated internally in thepipe 27. The casing'sinlet aperture 3 is connected to the first part-section 5a and the casing'soutlet aperture 4 is connected to the third part-section 5c so that the exhaust gases received by the device are caused to flow successively through the first part-section 5a, the second part-section 5b and the third part-section 5c. - The greater part of the noise caused by the exhaust gases from a combustion engine comprises low-frequency noise. A basic principle for damping low-frequency noise arising from exhaust gases is to lead the exhaust gases through a long line between two spaces. The device 1 illustrated comprises noise-damping
means 6 constructed according to this principle. Between a first space constituted by the passage's first part-section 5a and a second space constituted by the passage's third part-section 5c, the exhaust gases are led in aspiral flowpath 30 into the passage's second part-section 5b, as illustrated in Figs. 3 and 5. This spiral flowpath leads the exhaust gases radially inwards towards the casing'scentreline 24a from the first part-section 5a to the third part-section 5c. Leading the exhaust gases along saidspiral flowpath 30 enables the exhaust gases to be led for a long distance within a limited space, which means that the device can be made compact and occupy little space while at the same time very good noise characteristics can be achieved. If considered advantageous, a particle filter (not depicted) may be arranged in the first part-section 5a of the passage 5, i.e. in the space between thepipe 27 and thecasing 2. - The device 1 according to the invention is particularly intended to be fitted to a heavy motor vehicle, e.g. in the form of a truck or trailer, in order to treat exhaust gases from the motor vehicle's combustion engine. The device 1 is normally positioned with the longitudinal axis of the casing extending substantially parallel with or substantially perpendicular to the motor vehicle's longitudinal axis. Figs. 8 and 9 illustrate a device 1 according to the present invention, fitted to a
member 40 forming part of the frame of a motor vehicle. Themember 40 illustrated is conceived as extending in the longitudinal direction of the motor vehicle. Fig. 8 illustrates how the device 1 is suspended by means of a bracket relative to themember 40 concerned, with the longitudinal axis of thecasing 2 extending substantially perpendicular to the longitudinal direction of the member, i.e. substantially perpendicular to the longitudinal axis of the motor vehicle. Fig. 9 illustrates how the device 1 is suspended by means of abracket 42 relative to themember 40 concerned, with the longitudinal axis of thecasing 2 extending substantially parallel with the longitudinal direction of the member, i.e. substantially parallel with the longitudinal axis of the motor vehicle. Figs. 8 and 9 depict the device with the casing's inlet aperture connected to apipe 43 which forms part of an exhaust line leading exhaust gases from the motor vehicle's combustion engine to the device, and with the outlet aperture of thepipe connection 8 connected to apipe 44 which forms part of an exhaust line leading exhaust gases from the device 1 to the exhaust system outlet. An alternative version of thislatter pipe 44 is also depicted in Fig. 2. By rotation of thepipe connection 8 relative to thecasing 2, the pipe connection'soutlet aperture 10 can be given a desired direction and location relative to the vehicle frame while maintaining the same fitting position of thecasing 2 relative to the vehicle frame. - The invention is of course no way limited to the embodiments described above, as a multiplicity of possibilities for modifications thereof are likely to be obvious to a specialist in the field without having thereby to deviate from the basic concept of the invention as defined in the attached claims. For example, the passage 5 and the noise-damping
means 6 may be designed differently from what is here illustrated. Inter alia the design of thecasing 2 may also be different both internally and externally from what is here illustrated.
Claims (9)
- A device for exhaust gas treatment intended to be arranged in an exhaust system of a combustion engine, which device (1) comprises:- a casing (2) with an inlet aperture (3) for receiving exhaust gases and an outlet aperture (4) for the exhaust gases,- a passage (5) extending through the casing (2) for guiding the exhaust gases between the inlet aperture (3) and the outlet aperture (4),- means (6) arranged in the passage (5) for damping of noise caused by the exhaust gases, and/or means (7) arranged In the passage (5) for cleaning the exhaust gases,- a pipe connection (8) which has an outlet aperture (10) and an Inlet aperture (9) which is connected or connectable to the casing's outlet aperture (4), which pipe connection (8) is fastened or fastenable to the casing (2) and settable In various rotational positions relative to the casing (2) in order to regulate the direction of the pipe connection's outlet aperture (10) relative to the casing (2), and- a clamping means (15) for clamping the pipe connection (8) firmly to the casing (2), the clamping means (15) taking the form of a clamp ring arranged to engage with the pipe connection (8) externally about a flange (16) extending round the pipe connection's inlet aperture (9),characterized in that the device (1) comprises an exhaust gas cleaning unit (13) fitted detachably inside the casing (2) and insertable in the casing via the casing's outlet aperture (4), and that the clamping means (15) is arranged to clamp the pipe connection (8) firmly to the casing (2) by clamping the flange (16) of the pipe connection and a flange (20) of the casing firmly to a corresponding flange (17) of the exhaust gas cleaning unit.
- A device according to claim 1, characterized in that the pipe connection (8) has a contact surface (11) intended to engage with a corresponding contact surface (12) of the exhaust gas cleaning unit (13) arranged in the casing, said contact surfaces (11,12) being so designed that the pipe connection (8) is rotatable relative to the casing (2) when the contact surfaces (11, 12) are in mutual engagement.
- A device according to claim 2, characterised in that said contact surfaces (11, 12) are rotationally symmetrical.
- A device according to any of claims 1-3, characterised in that the pipe connection's flange (16) is arranged to engage via its outside with the clamp ring (15) and via its inside to engage with the corresponding flange (17) of the exhaust gas cleaning unit (13) arranged in the casing.
- A device according to any of claims 1-4, characterized in that the exhaust gas cleaning unit (13) comprises a catalyst.
- A device according to any one of the foregoing claims, characterised in that the casing (2) is substantially cylindrical and that the casing's outlet aperture (4) is arranged In an endwall (23a) of the casing, whereby the pipe connection (8) when fastened to the casing (2) is arranged to protrude from this endwall (23a).
- A device according to claim 6, characterised in that the pipe connection's inlet aperture (9) has a centreline which substantially coincides with or is substantially parallel with the casing's centreline (24a).
- A device according to claim 6 or 7, characterised in that the casing's Inlet aperture (3) is arranged In the casing's shell surface (25).
- A device according to any one of the foregoing claims, characterised in that the pipe connection's outlet aperture (10) is arranged to be directed away from the casing's centreline (24) when the pipe connection (8) is fastened to the casing (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE4012308 | 2004-05-12 | ||
SE0401230A SE527085E (en) | 2004-05-12 | 2004-05-12 | Device for exhaust gas treatment |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1596044A1 EP1596044A1 (en) | 2005-11-16 |
EP1596044B1 true EP1596044B1 (en) | 2007-07-18 |
Family
ID=32390933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05103766A Revoked EP1596044B1 (en) | 2004-05-12 | 2005-05-04 | Device for exhaust gas treatment |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1596044B1 (en) |
AT (1) | ATE367513T1 (en) |
BR (1) | BRPI0501671B1 (en) |
DE (1) | DE602005001656T2 (en) |
DK (1) | DK1596044T3 (en) |
SE (1) | SE527085E (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101842564B (en) * | 2007-10-29 | 2012-09-05 | 卡特彼勒公司 | System for treating exhaust gas |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006055953A1 (en) * | 2006-11-24 | 2008-05-29 | Volkswagen Ag | exhaust gas purification device |
GB0703820D0 (en) | 2007-02-28 | 2007-04-11 | Delphi Tech Inc | Exhaust gas treatment device for a diesel engine |
US8092563B2 (en) * | 2007-10-29 | 2012-01-10 | Caterpillar Inc. | System for treating exhaust gas |
US8083822B2 (en) * | 2008-03-06 | 2011-12-27 | Caterpillar Inc. | System for treating exhaust gas |
US8701387B2 (en) * | 2008-11-11 | 2014-04-22 | Hitachi Construction Machinery Co., Ltd. | Exhaust gas treatment device |
US10215075B2 (en) | 2014-10-24 | 2019-02-26 | Faurecia Emissions Control Technologies, Usa, Llc | Modular mixer inlet and mixer assembly to provide for compact mixer |
US10316721B1 (en) | 2018-04-23 | 2019-06-11 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
US10287948B1 (en) | 2018-04-23 | 2019-05-14 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
US10787946B2 (en) | 2018-09-19 | 2020-09-29 | Faurecia Emissions Control Technologies, Usa, Llc | Heated dosing mixer |
EP4026995A1 (en) * | 2021-01-11 | 2022-07-13 | Volvo Penta Corporation | Exhaust gas treatment device, a marine vessel and a genset |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001042630A2 (en) * | 1999-12-09 | 2001-06-14 | Eminox Limited | Apparatus for treating a gas system |
GB0026751D0 (en) * | 2000-11-02 | 2000-12-20 | Perkins Engines Co Ltd | Adaptable fluid-flow apparatus |
-
2004
- 2004-05-12 SE SE0401230A patent/SE527085E/en not_active IP Right Cessation
-
2005
- 2005-05-04 DK DK05103766T patent/DK1596044T3/en active
- 2005-05-04 EP EP05103766A patent/EP1596044B1/en not_active Revoked
- 2005-05-04 DE DE602005001656T patent/DE602005001656T2/en active Active
- 2005-05-04 AT AT05103766T patent/ATE367513T1/en not_active IP Right Cessation
- 2005-05-11 BR BRPI0501671-1A patent/BRPI0501671B1/en active IP Right Grant
Non-Patent Citations (1)
Title |
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None * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101842564B (en) * | 2007-10-29 | 2012-09-05 | 卡特彼勒公司 | System for treating exhaust gas |
Also Published As
Publication number | Publication date |
---|---|
DE602005001656D1 (en) | 2007-08-30 |
SE527085E (en) | 2012-06-19 |
DE602005001656T2 (en) | 2008-06-05 |
BRPI0501671A (en) | 2006-01-10 |
DK1596044T3 (en) | 2007-11-05 |
EP1596044A1 (en) | 2005-11-16 |
SE0401230D0 (en) | 2004-05-12 |
SE527085C2 (en) | 2005-12-20 |
BRPI0501671B1 (en) | 2015-08-04 |
ATE367513T1 (en) | 2007-08-15 |
SE0401230L (en) | 2005-11-13 |
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