US20110185575A1 - Method of Producing an Insulated Exhaust Gas Device - Google Patents
Method of Producing an Insulated Exhaust Gas Device Download PDFInfo
- Publication number
- US20110185575A1 US20110185575A1 US12/696,347 US69634710A US2011185575A1 US 20110185575 A1 US20110185575 A1 US 20110185575A1 US 69634710 A US69634710 A US 69634710A US 2011185575 A1 US2011185575 A1 US 2011185575A1
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- US
- United States
- Prior art keywords
- blanket
- insulation material
- tmax
- heating step
- silica fiber
- 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.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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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
- 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
- F01N13/14—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 having thermal insulation
-
- 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
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- 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
- F01N13/14—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 having thermal insulation
- F01N13/148—Multiple layers of insulating material
-
- 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
-
- 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
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2835—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support fibrous
-
- 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
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49345—Catalytic device making
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49398—Muffler, manifold or exhaust pipe making
Definitions
- This invention relates to exhaust gas aftertreatment and/or acoustic systems and the devices used therein that utilize insulation blankets or batts.
- Heat insulating batts and blankets are utilized in exhaust gas systems in order to provide heat insulation for acoustic and aftertreatment devices of the system to control the heat exchange to and from the devices. It is known to place such heat insulating blankets between adjacent wall surfaces of such device with the material of the heat insulation blanket being compressed to provide a desired installed density for the material to help maintain the heat insulating blanket in its mounted position via frictional forces between the blanket and the adjacent wall surfaces. Cost is typically a concern in any commercial system and one cost efficient heat insulation blanket material is made from silica fiber insulation material having a weight percentage of SiO 2 of greater than 65%. Unfortunately, when such a material was utilized in an exhaust gas aftertreatment device, the material failed after a period of time because the heat insulation blanket could not maintain adequate frictional engagement with the adjacent sidewalls in order to prevent destructive movement of the insulation blanket within the component.
- a method for producing an exhaust gas aftertreatment or acoustic device having a maximum operating temperature Tmax.
- the method includes the steps of: providing a blanket of silica fiber insulation material having a weight percentage of SiO 2 of greater than 65%; heating the blanket so that all of silica fiber insulation material is raised to a temperature T greater than Tmax; and installing the blanket in the device after the heating step.
- T is at least 1.05 ⁇ Tmax.
- the installing step includes installing the blanket so that the blanket is compressed between two adjacent surfaces of the device to achieve an average installed density of 0.18 grams/cubic centimeter to 0.30 grams/cubic centimeter of the insulation material in the blanket.
- the blanket is an uncompressed state.
- the blanket is heated in a rolled state wherein the blanket has been formed into a roll having a central axis.
- the blanket is rotated about the central axis.
- the blanket is planar.
- Tmax is within the range of 300° C. to 1100° C.
- the installing step includes installing the blanket so that the blanket encircles a core of the device through which the exhaust gas passes.
- the silica fiber insulation material has a weight percentage of SiO 2 of greater than 95%.
- a method for producing an exhaust gas aftertreatment or acoustic device having a maximum operating temperature Tmax.
- the method includes the steps of: providing a blanket of silica fiber insulation material having a weight percentage of SiO 2 of greater than 65%; heating the blanket so that all of silica fiber insulation material is raised to a temperature T greater than Tmax; and installing the blanket in the device after the heating step so that the blanket encircles a core of the device through which the exhaust gas passes and the blanket is compressed between two adjacent surfaces of the device to achieve an average installed density of 0.18 grams/cubic centimeter to 0.30 grams/cubic centimeter of the insulation material in the blanket.
- FIG. 1 is a diagrammatic representation of an exhaust gas system employing the invention
- FIG. 2 is a section view of an exhaust system component employing the invention of FIG. 1 taken from line 2 - 2 in FIG. 1 ;
- FIG. 3 is a side elevational diagrammatic representation of a heat treatment process employed in the invention.
- FIG. 4 is a perspective view diagrammatic representation of an alternative heat treatment process employed in the invention.
- FIG. 5 is a top plan view of yet another diagrammatic representation showing another alternate embodiment of a heat treatment process employed in the invention.
- An exhaust gas system 10 is shown in FIG. 1 in the form of a diesel exhaust gas aftertreatment system to treat the exhaust 12 from a diesel combustion process 14 , such as a diesel compression engine 16 .
- the exhaust 12 will typically contain oxides of nitrogen (NO x ) such as nitric oxide (NO) and nitrogen dioxide (NO 2 ) among others, particulate matter (PM), hydrocarbons, carbon monoxide (CO), and other combustion by-products.
- the system 10 includes one or more exhaust gas acoustic and/or aftertreatment devices or components 18 , with each device having a corresponding maximum operating temperature Tmax that can be achieved during operation of the system 10 .
- Examples of such devices 18 include catalytic converters, diesel oxidation catalysts, diesel particulate filters, gas particulate filters, lean NO x traps, selective catalytic reduction monoliths, burners, manifolds, connecting pipes, mufflers, resonators, tail pipes, emission control system enclosure boxes, insulation rings, insulated end cones, insulated end caps, insulated inlet pipes, and insulated outlet pipes, all of any cross-sectional geometry, many of which are known.
- FIG. 2 shows one example of such a device 18 for use in the system 10 in the form of a catalytic unit 20 having a catalytic core 22 , a mount mat 24 , a cylindrical inner housing or can 26 , and heat insulating blanket or batt 28 , and a cylindrical outer housing or jacket 30 .
- the core 22 will typically be a ceramic substrate 32 having a monolithic structure with a catalyst coated thereon and will typically have an oval or circular cross section.
- the mounting mat 24 is sandwiched between the core 22 and the can 26 to help protect the core 22 from shock and vibrational forces that can be transmitted from the can 26 to the core 22 .
- the mounting mat 24 is made of a heat resistant and shock absorbing-type material, such as a mat of glass fibers or rock wool and is compressed between the can and the carrier in order to generate a desired holding force.
- the heat insulating blanket 28 is made of a silica fiber insulation material having a weight percentage of SiO 2 of greater than 65%, and in preferred embodiments greater than 95%, and in highly preferred embodiments greater than 98%.
- a silica fiber insulation material having a weight percentage of SiO 2 of greater than 65%, and in preferred embodiments greater than 95%, and in highly preferred embodiments greater than 98%.
- Such material is known and commercially available, with one suitable example being supplied by BGF Industries, Inc. under the trade name SilcoSoft®, and another suitable example being supplied by ASGLAWO technofibre GmbH under the trade name Asglasil®.
- Such material is typically supplied in rolls, with the individual blankets 28 being die cut to the appropriate length and width for the corresponding device 18 after the material has been taken from the roll.
- the blanket 28 is shown being compressed in the annular gap 34 between the cylindrical can 26 and housing 30 , the blanket 28 could be compressed between other adjacent surfaces of a device, including for example, a pair of planar adjacent surfaces, a pair of non-planar adjacent surfaces, a pair of conical adjacent surfaces, or any other pair of adjacent surfaces that can be found in acoustic or aftertreatment devices for exhaust systems.
- the blanket 28 is heat treated to achieve calcination of the silica fiber insulation material.
- the blanket 28 is heated so that all of the silica fiber insulation material in the blanket 28 is raised to a temperature T greater than the maximum operating temperature Tmax of the device 18 .
- This heat treatment improves the resiliency and erosion resistance of the silica fiber insulation material and also eliminates the potential for a “thermoset” failure mode that can result if the silica fiber material were calcinated in-situ in the device 18 during operation of the system 10 .
- the heat treatment take place using an in-line oven 40 wherein the silica fiber heat insulation material is unrolled from a supply roll 42 of the material and passed flat through the oven 40 on conveyor 43 so that the blanket 28 is planar during the heat treatment to reduce or prevent differential heating of the material of the blanket 28 and variation in thickness of the material in the blanket 28 .
- the individual blankets 28 can be die cut to the desired length and width before installing in the device 18 .
- the complete supply roll 42 of the silica fiber heat insulation material can be heat treated, with or without rotation of the roll 42 about its center axis 44 in an oven 46 , as shown in FIG. 4 .
- the individual blankets 28 can be die cut to the desired length and width after heat treatment and before installing in the device 18 .
- the silica fiber insulation material can be die cut before heat treatment, with the blanket 28 being slightly oversized in length and width to account for shrinkage during heat treatment. The die cut blankets 28 can then be heat treated in an oven 40 or 44 while laying flat on a planar surface, as shown in FIG. 5 .
- the heat treated blanket 28 can be installed in a device 18 so that the blanket 28 is compressed between two adjacent surfaces of the device 18 and can maintain suitable frictional engagement with the surfaces over the desired life of the device 18 because the silica fiber insulation material of the blanket 28 maintains its resiliency and does not take on a “thermoset” from the max operation temperature Tmax of the device 18 .
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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)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
- Not applicable.
- Not Applicable.
- Not Applicable.
- This invention relates to exhaust gas aftertreatment and/or acoustic systems and the devices used therein that utilize insulation blankets or batts.
- Heat insulating batts and blankets are utilized in exhaust gas systems in order to provide heat insulation for acoustic and aftertreatment devices of the system to control the heat exchange to and from the devices. It is known to place such heat insulating blankets between adjacent wall surfaces of such device with the material of the heat insulation blanket being compressed to provide a desired installed density for the material to help maintain the heat insulating blanket in its mounted position via frictional forces between the blanket and the adjacent wall surfaces. Cost is typically a concern in any commercial system and one cost efficient heat insulation blanket material is made from silica fiber insulation material having a weight percentage of SiO2 of greater than 65%. Unfortunately, when such a material was utilized in an exhaust gas aftertreatment device, the material failed after a period of time because the heat insulation blanket could not maintain adequate frictional engagement with the adjacent sidewalls in order to prevent destructive movement of the insulation blanket within the component.
- In accordance with one feature of the invention, a method is provided for producing an exhaust gas aftertreatment or acoustic device having a maximum operating temperature Tmax. The method includes the steps of: providing a blanket of silica fiber insulation material having a weight percentage of SiO2 of greater than 65%; heating the blanket so that all of silica fiber insulation material is raised to a temperature T greater than Tmax; and installing the blanket in the device after the heating step.
- As one feature, T is at least 1.05×Tmax.
- According to one feature, the installing step includes installing the blanket so that the blanket is compressed between two adjacent surfaces of the device to achieve an average installed density of 0.18 grams/cubic centimeter to 0.30 grams/cubic centimeter of the insulation material in the blanket.
- In one feature, during the heating step the blanket is an uncompressed state.
- As one feature, during the heating step the blanket is heated in a rolled state wherein the blanket has been formed into a roll having a central axis. In a further feature, during the heating step the blanket is rotated about the central axis.
- According to one feature, during the heating step the blanket is planar.
- In one feature, Tmax is within the range of 300° C. to 1100° C.
- As one feature, the installing step includes installing the blanket so that the blanket encircles a core of the device through which the exhaust gas passes.
- In one feature, the silica fiber insulation material has a weight percentage of SiO2 of greater than 95%.
- In accordance with one feature of the invention, a method is provided for producing an exhaust gas aftertreatment or acoustic device having a maximum operating temperature Tmax. The method includes the steps of: providing a blanket of silica fiber insulation material having a weight percentage of SiO2 of greater than 65%; heating the blanket so that all of silica fiber insulation material is raised to a temperature T greater than Tmax; and installing the blanket in the device after the heating step so that the blanket encircles a core of the device through which the exhaust gas passes and the blanket is compressed between two adjacent surfaces of the device to achieve an average installed density of 0.18 grams/cubic centimeter to 0.30 grams/cubic centimeter of the insulation material in the blanket.
- Other objects, features, and advantages of the invention will become apparent from a review of the entire specification, including the appended claims and drawings.
-
FIG. 1 is a diagrammatic representation of an exhaust gas system employing the invention; -
FIG. 2 is a section view of an exhaust system component employing the invention ofFIG. 1 taken from line 2-2 inFIG. 1 ; -
FIG. 3 is a side elevational diagrammatic representation of a heat treatment process employed in the invention; -
FIG. 4 is a perspective view diagrammatic representation of an alternative heat treatment process employed in the invention; and -
FIG. 5 is a top plan view of yet another diagrammatic representation showing another alternate embodiment of a heat treatment process employed in the invention. - An
exhaust gas system 10 is shown inFIG. 1 in the form of a diesel exhaust gas aftertreatment system to treat theexhaust 12 from adiesel combustion process 14, such as adiesel compression engine 16. Theexhaust 12 will typically contain oxides of nitrogen (NOx) such as nitric oxide (NO) and nitrogen dioxide (NO2) among others, particulate matter (PM), hydrocarbons, carbon monoxide (CO), and other combustion by-products. Thesystem 10 includes one or more exhaust gas acoustic and/or aftertreatment devices orcomponents 18, with each device having a corresponding maximum operating temperature Tmax that can be achieved during operation of thesystem 10. Examples ofsuch devices 18 include catalytic converters, diesel oxidation catalysts, diesel particulate filters, gas particulate filters, lean NOx traps, selective catalytic reduction monoliths, burners, manifolds, connecting pipes, mufflers, resonators, tail pipes, emission control system enclosure boxes, insulation rings, insulated end cones, insulated end caps, insulated inlet pipes, and insulated outlet pipes, all of any cross-sectional geometry, many of which are known. As those skilled in the art will appreciate, some of theforegoing devices 18 are strictly metallic components with acentral core 19 through which theexhaust 12 flows, and other of thedevices 18 can include acore 19 in the form of a ceramic monolithic structure and/or a woven metal structure through which theexhaust 12 flows. Thesedevices 18 are conventionally used in motor vehicles (diesel or gasoline), construction equipment, locomotive engine applications (diesel or gasoline), marine engine applications (diesel or gasoline), small internal combustion engines (diesel or gasoline), and stationary power generation (diesel or gasoline). -
FIG. 2 shows one example of such adevice 18 for use in thesystem 10 in the form of acatalytic unit 20 having acatalytic core 22, amount mat 24, a cylindrical inner housing or can 26, and heat insulating blanket orbatt 28, and a cylindrical outer housing orjacket 30. Thecore 22 will typically be aceramic substrate 32 having a monolithic structure with a catalyst coated thereon and will typically have an oval or circular cross section. The mountingmat 24 is sandwiched between thecore 22 and thecan 26 to help protect thecore 22 from shock and vibrational forces that can be transmitted from thecan 26 to thecore 22. Typically themounting mat 24 is made of a heat resistant and shock absorbing-type material, such as a mat of glass fibers or rock wool and is compressed between the can and the carrier in order to generate a desired holding force. - The
heat insulating blanket 28 is made of a silica fiber insulation material having a weight percentage of SiO2 of greater than 65%, and in preferred embodiments greater than 95%, and in highly preferred embodiments greater than 98%. Such material is known and commercially available, with one suitable example being supplied by BGF Industries, Inc. under the trade name SilcoSoft®, and another suitable example being supplied by ASGLAWO technofibre GmbH under the trade name Asglasil®. Such material is typically supplied in rolls, with theindividual blankets 28 being die cut to the appropriate length and width for thecorresponding device 18 after the material has been taken from the roll. Preferably, theblanket 28 is sandwiched or compressed in theannular gap 34 between theouter surface 36 of thecan 26 and theinner surface 38 of thehousing 30 to achieve an average installed density of 0.18 grams/cubic centimeter to 0.30 grams/cubic centimeter of the silica fiber insulation material of theblanket 28. This provides sufficient frictional engagement between theblanket 28 and thesurfaces blanket 28 is shown being compressed in theannular gap 34 between the cylindrical can 26 and housing 30, theblanket 28 could be compressed between other adjacent surfaces of a device, including for example, a pair of planar adjacent surfaces, a pair of non-planar adjacent surfaces, a pair of conical adjacent surfaces, or any other pair of adjacent surfaces that can be found in acoustic or aftertreatment devices for exhaust systems. - According to the invention, before the
blanket 28 is installed into thedevice 18, theblanket 28 is heat treated to achieve calcination of the silica fiber insulation material. In this regard, theblanket 28 is heated so that all of the silica fiber insulation material in theblanket 28 is raised to a temperature T greater than the maximum operating temperature Tmax of thedevice 18. This heat treatment improves the resiliency and erosion resistance of the silica fiber insulation material and also eliminates the potential for a “thermoset” failure mode that can result if the silica fiber material were calcinated in-situ in thedevice 18 during operation of thesystem 10. Preferably, this heat treatment takes place with theblanket 28 in an uncompressed or free state wherein there are no compressive forces being applied to the silica fiber insulation material of theblanket 28. The temperature T preferably has some margin of safety above the maximum operating temperature Tmax of thedevice 18, with one preferred margin of safety being 1.05×Tmax. - As shown in
FIG. 3 , it is also preferred that the heat treatment take place using an in-line oven 40 wherein the silica fiber heat insulation material is unrolled from asupply roll 42 of the material and passed flat through theoven 40 onconveyor 43 so that theblanket 28 is planar during the heat treatment to reduce or prevent differential heating of the material of theblanket 28 and variation in thickness of the material in theblanket 28. After heat treatment, theindividual blankets 28 can be die cut to the desired length and width before installing in thedevice 18. As an alternative, thecomplete supply roll 42 of the silica fiber heat insulation material can be heat treated, with or without rotation of theroll 42 about itscenter axis 44 in anoven 46, as shown inFIG. 4 . In this regard, it is believed that rotating theroll 42 about itsaxis 44 will serve to prevent a differential heating in the roll. Again, theindividual blankets 28 can be die cut to the desired length and width after heat treatment and before installing in thedevice 18. As yet an another alternative, the silica fiber insulation material can be die cut before heat treatment, with theblanket 28 being slightly oversized in length and width to account for shrinkage during heat treatment. Thedie cut blankets 28 can then be heat treated in anoven FIG. 5 . - It has been found that by heat treating the silica fiber heat insulation material to the temperature T greater than Tmax before the
blanket 28 is installed in thedevice 18, the heat treatedblanket 28 can be installed in adevice 18 so that theblanket 28 is compressed between two adjacent surfaces of thedevice 18 and can maintain suitable frictional engagement with the surfaces over the desired life of thedevice 18 because the silica fiber insulation material of theblanket 28 maintains its resiliency and does not take on a “thermoset” from the max operation temperature Tmax of thedevice 18. - It should be appreciated that while the invention has been described herein in connection with a diesel combustion process in the form of a
diesel compression engine 16, the invention may find use in devices that are utilized in exhaust gas systems for other types of combustion processes, including other types of internal combustion engines, including, for example, internal combustion engines that use gasoline or other alternative fuels.
Claims (19)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/696,347 US20110185575A1 (en) | 2010-01-29 | 2010-01-29 | Method of Producing an Insulated Exhaust Gas Device |
KR1020127019944A KR20120125981A (en) | 2010-01-29 | 2010-06-03 | Method of producing an insulated exhaust gas device |
PCT/US2010/037217 WO2011093920A1 (en) | 2010-01-29 | 2010-06-03 | Method of producing an insulated exhaust gas device |
CN2010800623286A CN102821835A (en) | 2010-01-29 | 2010-06-03 | Method of producing an insulated exhaust gas device |
BR112012018811A BR112012018811A2 (en) | 2010-01-29 | 2010-06-03 | method of producing an isolated exhaust gas device. |
DE112010005206T DE112010005206T5 (en) | 2010-01-29 | 2010-06-03 | Method for producing an insulated exhaust device |
JP2012551142A JP2013517940A (en) | 2010-01-29 | 2010-06-03 | Method for manufacturing an adiabatic exhaust gas device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/696,347 US20110185575A1 (en) | 2010-01-29 | 2010-01-29 | Method of Producing an Insulated Exhaust Gas Device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110185575A1 true US20110185575A1 (en) | 2011-08-04 |
Family
ID=44319653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/696,347 Abandoned US20110185575A1 (en) | 2010-01-29 | 2010-01-29 | Method of Producing an Insulated Exhaust Gas Device |
Country Status (7)
Country | Link |
---|---|
US (1) | US20110185575A1 (en) |
JP (1) | JP2013517940A (en) |
KR (1) | KR20120125981A (en) |
CN (1) | CN102821835A (en) |
BR (1) | BR112012018811A2 (en) |
DE (1) | DE112010005206T5 (en) |
WO (1) | WO2011093920A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012044375A1 (en) * | 2010-09-30 | 2012-04-05 | Tenneco Automotive Operating Company, Inc. | Method of installing a multi-layer batt, blanket or mat in an exhaust gas aftertreatment or acoustic device |
WO2013058840A1 (en) * | 2011-10-20 | 2013-04-25 | Tenneco Automotive Operating Company, Inc. | Method of producing an insulated exhaust device |
US20170101917A1 (en) * | 2015-10-12 | 2017-04-13 | Angelo Miretti | Engine with explosion protection |
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US3488723A (en) * | 1966-07-05 | 1970-01-06 | Owens Corning Fiberglass Corp | Acoustical material for high temperature application |
US5250269A (en) * | 1992-05-21 | 1993-10-05 | Minnesota Mining And Manufacturing Company | Catalytic converter having a metallic monolith mounted by a heat-insulating mat of refractory ceramic fibers |
US5569423A (en) * | 1994-02-17 | 1996-10-29 | Aerospatiale Societe Nationale Industrielle | Process for the manufacture of a silica fiber based heat insulating material |
US5594216A (en) * | 1994-11-29 | 1997-01-14 | Lockheed Missiles & Space Co., Inc. | Jet engine sound-insulation structure |
US6589488B1 (en) * | 1998-11-19 | 2003-07-08 | Wacker-Chemie Gmbh | Molding for supporting a monolith in a catalytic converter |
US20040134172A1 (en) * | 2002-09-30 | 2004-07-15 | Unifrax Corporation | Exhaust gas treatment device and method for making the same |
US20060127833A1 (en) * | 2001-05-24 | 2006-06-15 | Mitsubishi Chemical Functional Products, Inc. | Process for producing continuous alumina fiber blanket |
US20090098324A1 (en) * | 2007-10-11 | 2009-04-16 | Sri Sports Limited | Tubular body manufacturing method and tubular body |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5161530B2 (en) * | 2007-10-11 | 2013-03-13 | ダンロップスポーツ株式会社 | Tubular body manufacturing method and tubular body |
JP2010168706A (en) * | 2009-01-26 | 2010-08-05 | Ibiden Co Ltd | Mat material, apparatus for treating exhaust gas and method for manufacturing mat material |
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2010
- 2010-01-29 US US12/696,347 patent/US20110185575A1/en not_active Abandoned
- 2010-06-03 DE DE112010005206T patent/DE112010005206T5/en not_active Withdrawn
- 2010-06-03 JP JP2012551142A patent/JP2013517940A/en active Pending
- 2010-06-03 BR BR112012018811A patent/BR112012018811A2/en not_active IP Right Cessation
- 2010-06-03 KR KR1020127019944A patent/KR20120125981A/en not_active Application Discontinuation
- 2010-06-03 CN CN2010800623286A patent/CN102821835A/en active Pending
- 2010-06-03 WO PCT/US2010/037217 patent/WO2011093920A1/en active Application Filing
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012044375A1 (en) * | 2010-09-30 | 2012-04-05 | Tenneco Automotive Operating Company, Inc. | Method of installing a multi-layer batt, blanket or mat in an exhaust gas aftertreatment or acoustic device |
US8752290B2 (en) | 2010-09-30 | 2014-06-17 | Tenneco Automotive Operating Company Inc. | Method of installing a longitudinally offset multi-layer mat in an exhaust gas aftertreatment or acoustic device |
WO2013058840A1 (en) * | 2011-10-20 | 2013-04-25 | Tenneco Automotive Operating Company, Inc. | Method of producing an insulated exhaust device |
CN104039552A (en) * | 2011-10-20 | 2014-09-10 | 坦尼科汽车营业公司 | Method of producing an insulated exhaust device |
US9217357B2 (en) | 2011-10-20 | 2015-12-22 | Ruth Latham | Method of producing an insulated exhaust device |
US20170101917A1 (en) * | 2015-10-12 | 2017-04-13 | Angelo Miretti | Engine with explosion protection |
US10605147B2 (en) * | 2015-10-12 | 2020-03-31 | Angelo Miretti | Engine with explosion protection |
Also Published As
Publication number | Publication date |
---|---|
KR20120125981A (en) | 2012-11-19 |
BR112012018811A2 (en) | 2019-09-24 |
JP2013517940A (en) | 2013-05-20 |
WO2011093920A1 (en) | 2011-08-04 |
CN102821835A (en) | 2012-12-12 |
DE112010005206T5 (en) | 2012-11-29 |
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