US20120096842A1 - Exhaust manifold - Google Patents
Exhaust manifold Download PDFInfo
- Publication number
- US20120096842A1 US20120096842A1 US13/274,321 US201113274321A US2012096842A1 US 20120096842 A1 US20120096842 A1 US 20120096842A1 US 201113274321 A US201113274321 A US 201113274321A US 2012096842 A1 US2012096842 A1 US 2012096842A1
- Authority
- US
- United States
- Prior art keywords
- insulating
- molded part
- exhaust manifold
- inner tube
- jacket
- 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
Links
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
- 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
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds 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
- 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
- F01N13/141—Double-walled exhaust pipes or housings
-
- 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
- F01N13/16—Selection of particular 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
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
Definitions
- the invention relates to an exhaust manifold for an internal combustion engine of the type having an exhaust gas inner tube and an outer jacket.
- Exhaust manifolds are often insulated, in particular if the exhaust gas temperature is to reach a high level as soon as possible for downstream units, for example a catalyst or a turbocharger or the like, so that the downstream units can work correctly, or the construction can be built from low-quality materials, or so that these work at all.
- downstream units for example a catalyst or a turbocharger or the like
- the object underlying the invention is to provide a particularly effective kind of insulation for an exhaust manifold.
- an insulation embodied as an insulating molded part pressed into shape and arranged between the jacket and the inner tube and that contains an insulating fibrous tissue and a binder.
- the FIGURE shows a schematic representation of a section through an exhaust manifold.
- the inventive design as an insulating molded part on the basis of an insulating fibrous tissue permits arranging the insulation inside, i.e. between the exhaust gas conducting inner tube and the outer jacket of the exhaust manifold. By this, the outer jacket is also protected from increased temperatures, or an increase in the temperature level in the exhaust gas for the downstream units is reached earlier, and some sound protection is simultaneously achieved.
- a mechanical cohesion of the insulation is furthermore achieved without any additional provisions, for example without any additional foil coating or the like. By this, the air gap between the jacket and the inner tube provided in the installation is maintained even under rough operational conditions, and fibers are simply and safely prevented from being blown out.
- the insulating fibrous tissue preferably consists of silicate fibers, but it can also consist of glass fibers or the like.
- the binder used for compression molding the insulating molded part is alumina, in particular bentonite.
- the insulating molded part is preferably installed such that the insulating fibrous tissue, or the side of the insulating molded part containing the largest proportion of insulating fibrous tissue, is adjacent to an air gap.
- the FIGURE shows, in a schematic representation, a section through an exhaust manifold 1 for an internal combustion engine, preferably for motor vehicles.
- the exhaust manifold 1 contains the usual exhaust gas conducting inner tubes 2 which are surrounded by a jacket 3 at a distance A.
- the exhaust tubes 2 and the jacket 3 can consist of the usual materials, such as cast parts or steel plate.
- the inner insulation 4 is accommodated within the distance A.
- the inner insulation 4 preferably covers the complete inner surface of the jacket 3 , however, it is thinner than the distance A, so that, despite the installation of the insulation 4 , an insulating air gap 5 to the inner tube 2 remains.
- the insulation 4 is between 1 mm and 3 mm, preferably between 1 . 5 mm to 2 mm thick, so that the air gap 5 is reduced by this amount with respect to the distance A.
- the insulation 4 is embodied as an insulating molded part.
- the insulating molded part contains a carrier mat in the form of a woven cloth of insulating fibers, in particular silicate fibers, but also glass fibers or the like.
- the insulating fibrous tissues are commercially available and consist of transverse and longitudinal threads which are interlaced with most diverse kinds of weave known from the field of textiles.
- a particularly preferred embodiment of an insulating fibrous tissue is on the market under the trade mark Hakoterm® 1200 HG 1305. This material consists of twisted silicate fibers that have been woven to form a woven mat.
- woven mats of silicate fibers instead of woven mats of silicate fibers, however, woven glass fibers or woven cloths of similar fibers suited for insulation, e.g. mineral fibers, can also be employed.
- an adequate blank of the insulating fibrous tissue is provided with a conventional binder, for example alumina in the form of bentonite, suspended in water, and then finally shaped by hot pressing.
- a conventional binder for example alumina in the form of bentonite
- Color pigments can also be added to the binder and influence heat absorption and/or heat reflection such that, on the one hand, the surrounding components are protected from thermal overload, and on the other hand, care is taken that, when the internal combustion engine is started, an increase in the exhaust energy is achieved very quickly, resulting in a quick increase in the temperature in the exhaust pipe during the warm-up time, and thereby in a reduction of NO x values and CO 2 emission.
- a particularly suited color pigment is a copper chromite black spinell, as it is available, for example, as Black 30C965 from the Company “The Shepherd Color Company”. This color pigment mainly acts in an absorbing manner.
- a preferably reflecting color pigment is a yellow color pigment (buff rutile on the basis of chrome, antimony and titanium), preferably YELLOW 193 of the same company.
- the color pigments are preferably admixed to the binder, but they can also get onto or into the insulating molded body in any other way.
- the installation of the insulating molded part 4 is effected such that the woven side of the insulating molded part, i.e. the side which consists of the woven mat or comprises the higher proportion of the woven mat, abuts the air gap 5 , and the opposite side abuts the jacket 3 .
- This ensures that maximum protection against the blowing out and detachment of components of the insulation due to vibrations or the like is provided, so that the risk of malfunctions due to blown away or otherwise displaced particles in the exhaust system is not given.
- the insulating molded part 4 manufactured in this manner is self-supporting, so that no additional protective layer, for example a metal foil or the like, is required as a delimitation or for mechanical stabilization.
- the insulating molded part 4 can be simply fixed at the outer jacket 3 , and the jacket 3 can be fixed, together with the insulation 4 , around the inner tubes 2 with the required air gap 5 .
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
An exhaust manifold for an internal combustion engine with an exhaust gas conducting inner tube and an outer jacket which is insulated particularly effectively and inexpensively is described. To this end, it is suggested to embody the insulation as an insulating molded part pressed into shape and to arrange it between the jacket and the interior, the insulating molded part containing an insulating fibrous tissue and a binder.
Description
- The invention relates to an exhaust manifold for an internal combustion engine of the type having an exhaust gas inner tube and an outer jacket.
- Exhaust manifolds are often insulated, in particular if the exhaust gas temperature is to reach a high level as soon as possible for downstream units, for example a catalyst or a turbocharger or the like, so that the downstream units can work correctly, or the construction can be built from low-quality materials, or so that these work at all.
- The object underlying the invention is to provide a particularly effective kind of insulation for an exhaust manifold.
- The object is achieved by the features of an insulation embodied as an insulating molded part pressed into shape and arranged between the jacket and the inner tube and that contains an insulating fibrous tissue and a binder.
- The FIGURE shows a schematic representation of a section through an exhaust manifold.
- The inventive design as an insulating molded part on the basis of an insulating fibrous tissue permits arranging the insulation inside, i.e. between the exhaust gas conducting inner tube and the outer jacket of the exhaust manifold. By this, the outer jacket is also protected from increased temperatures, or an increase in the temperature level in the exhaust gas for the downstream units is reached earlier, and some sound protection is simultaneously achieved. By the design as a molded part on the basis of a woven cloth of insulating fibers, a mechanical cohesion of the insulation is furthermore achieved without any additional provisions, for example without any additional foil coating or the like. By this, the air gap between the jacket and the inner tube provided in the installation is maintained even under rough operational conditions, and fibers are simply and safely prevented from being blown out.
- Advantageous further developments of the invention can be taken or appreciated from the claims.
- The insulating fibrous tissue preferably consists of silicate fibers, but it can also consist of glass fibers or the like.
- The binder used for compression molding the insulating molded part is alumina, in particular bentonite.
- P-2869
- The insulating molded part is preferably installed such that the insulating fibrous tissue, or the side of the insulating molded part containing the largest proportion of insulating fibrous tissue, is adjacent to an air gap.
- It is furthermore possible to mix the insulating molded part with pigments which have a heat absorbing or heat reflecting effect.
- One embodiment of the invention will be illustrated below with reference to the single figure which shows a section through a schematically represented inventive exhaust manifold.
- The FIGURE shows, in a schematic representation, a section through an exhaust manifold 1 for an internal combustion engine, preferably for motor vehicles.
- The exhaust manifold 1 contains the usual exhaust gas conducting
inner tubes 2 which are surrounded by a jacket 3 at a distance A. Theexhaust tubes 2 and the jacket 3 can consist of the usual materials, such as cast parts or steel plate. - An inner insulation 4 is accommodated within the distance A. The inner insulation 4 preferably covers the complete inner surface of the jacket 3, however, it is thinner than the distance A, so that, despite the installation of the insulation 4, an insulating air gap 5 to the
inner tube 2 remains. - The insulation 4 is between 1 mm and 3 mm, preferably between 1.5 mm to 2 mm thick, so that the air gap 5 is reduced by this amount with respect to the distance A.
- The insulation 4 is embodied as an insulating molded part. The insulating molded part contains a carrier mat in the form of a woven cloth of insulating fibers, in particular silicate fibers, but also glass fibers or the like. The insulating fibrous tissues are commercially available and consist of transverse and longitudinal threads which are interlaced with most diverse kinds of weave known from the field of textiles. A particularly preferred embodiment of an insulating fibrous tissue is on the market under the trade mark Hakoterm® 1200 HG 1305. This material consists of twisted silicate fibers that have been woven to form a woven mat.
- Instead of woven mats of silicate fibers, however, woven glass fibers or woven cloths of similar fibers suited for insulation, e.g. mineral fibers, can also be employed.
- For the manufacture of the insulating molded part, an adequate blank of the insulating fibrous tissue is provided with a conventional binder, for example alumina in the form of bentonite, suspended in water, and then finally shaped by hot pressing.
- Color pigments can also be added to the binder and influence heat absorption and/or heat reflection such that, on the one hand, the surrounding components are protected from thermal overload, and on the other hand, care is taken that, when the internal combustion engine is started, an increase in the exhaust energy is achieved very quickly, resulting in a quick increase in the temperature in the exhaust pipe during the warm-up time, and thereby in a reduction of NOx values and CO2 emission.
- A particularly suited color pigment is a copper chromite black spinell, as it is available, for example, as Black 30C965 from the Company “The Shepherd Color Company”. This color pigment mainly acts in an absorbing manner. A preferably reflecting color pigment is a yellow color pigment (buff rutile on the basis of chrome, antimony and titanium), preferably YELLOW 193 of the same company.
- The color pigments are preferably admixed to the binder, but they can also get onto or into the insulating molded body in any other way.
- The installation of the insulating molded part 4 is effected such that the woven side of the insulating molded part, i.e. the side which consists of the woven mat or comprises the higher proportion of the woven mat, abuts the air gap 5, and the opposite side abuts the jacket 3. This ensures that maximum protection against the blowing out and detachment of components of the insulation due to vibrations or the like is provided, so that the risk of malfunctions due to blown away or otherwise displaced particles in the exhaust system is not given. The insulating molded part 4 manufactured in this manner is self-supporting, so that no additional protective layer, for example a metal foil or the like, is required as a delimitation or for mechanical stabilization. The insulating molded part 4 can be simply fixed at the outer jacket 3, and the jacket 3 can be fixed, together with the insulation 4, around the
inner tubes 2 with the required air gap 5.
Claims (9)
1. Exhaust manifold (1) for an internal combustion engine, having an exhaust gas conducting inner tube (2), an outer jacket (3), and an insulation (4), characterized in that the insulation is embodied as an insulating molded part (4) pressed into shape and arranged between the jacket (3) and the inner tube, and that it contains an insulating fibrous tissue and a binder.
2. Exhaust manifold according to claim 1 , wherein:
the insulating fibrous tissue contains a fiber mat of mineral fibers, such as a woven glass and/or silicate and/or ceramic fiber mat.
3. Exhaust manifold according to claim 1 , wherein:
the binder is alumina, in particular bentonite.
4. Exhaust manifold according to claim 1 , wherein:
the insulating molded part (4) is separated from the inner tube (2) by an air gap (5).
5. Exhaust manifold according to claim 4 , wherein:
the insulating fibrous tissue of the insulating molded part (4) is arranged adjacent to the air gap (5).
6. Exhaust manifold according to claim 1 , wherein:
the insulating molded part (4) contains heat absorbing and/or heat reflecting pigments.
7. An exhaust manifold for an internal combustion engine comprising:
an exhaust gas conducting inner tube;
a jacket spaced a distance from said exhaust gas conducting inner tube; and
an insulating molded part pressed into a shape and placed between said exhaust gas conducting inner tube and said jacket, said insulating molded part comprising an insulating fibrous tissue and a binder,
whereby a mechanical cohesion is obtained and fibers are prevented from being blown out.
8. An exhaust manifold for an internal combustion engine as in claim 7 wherein:
said insulating molded part is placed adjacent said jacket so that an air gap is formed between said insulating molded part and said exhaust gas conducting inner tube.
9. An exhaust manifold for an internal combustion engine as in claim 7 wherein:
the insulating fibrous tissue comprises a woven cloth of insulating fibers.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010048973.5 | 2010-10-20 | ||
DE102010048973A DE102010048973A1 (en) | 2010-10-20 | 2010-10-20 | exhaust manifold |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120096842A1 true US20120096842A1 (en) | 2012-04-26 |
Family
ID=44582014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/274,321 Abandoned US20120096842A1 (en) | 2010-10-20 | 2011-10-15 | Exhaust manifold |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120096842A1 (en) |
EP (1) | EP2444617B1 (en) |
DE (1) | DE102010048973A1 (en) |
ES (1) | ES2567710T3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120103458A1 (en) * | 2010-10-20 | 2012-05-03 | Matthias Kroll | Insulating molded part |
US9488081B2 (en) | 2014-12-17 | 2016-11-08 | Caterpillar Inc. | Exhaust manifold assembly and system |
US9885268B2 (en) | 2015-09-10 | 2018-02-06 | Isolite Gmbh | Reflective insulation system |
US20190226361A1 (en) * | 2018-01-25 | 2019-07-25 | Man Energy Solutions Se | Turbocharger |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9790836B2 (en) | 2012-11-20 | 2017-10-17 | Tenneco Automotive Operating Company, Inc. | Loose-fill insulation exhaust gas treatment device and methods of manufacturing |
DE102015011143A1 (en) | 2015-08-25 | 2016-03-03 | Daimler Ag | Exhaust manifold for an exhaust system of a vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182122A (en) * | 1978-02-15 | 1980-01-08 | Caterpillar Tractor Co. | Insulated exhaust manifold |
US4972674A (en) * | 1988-05-02 | 1990-11-27 | Ngk Insulators, Ltd. | Heat insulating ceramic insert-cast articles for use in exhaust channels in internal combustion engines and a process for producing the same |
US5816043A (en) * | 1996-01-02 | 1998-10-06 | Acoust-A-Fiber Research And Development, Inc. | Shield encompassing a hot pipe |
US6555070B1 (en) * | 1998-10-05 | 2003-04-29 | Scambia Industrial Developments Ag | Exhaust component and method for producing an exhaust component |
US6966402B2 (en) * | 2003-06-02 | 2005-11-22 | Dana Corporation | Acoustical heat shield |
US20060156958A1 (en) * | 2003-05-06 | 2006-07-20 | Simmons Jason A | Thermal protective coating |
US20100005792A1 (en) * | 2008-07-09 | 2010-01-14 | Ibiden Co., Ltd. | Heat-receiving member and exhaust pipe heat-releasing system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19536124A1 (en) * | 1995-09-28 | 1997-04-03 | Elringklinger Gmbh | Exhaust manifold |
FR2889559B1 (en) * | 2005-08-08 | 2011-06-10 | Renault Sas | EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE |
-
2010
- 2010-10-20 DE DE102010048973A patent/DE102010048973A1/en not_active Withdrawn
-
2011
- 2011-09-09 ES ES11007366.5T patent/ES2567710T3/en active Active
- 2011-09-09 EP EP11007366.5A patent/EP2444617B1/en active Active
- 2011-10-15 US US13/274,321 patent/US20120096842A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4182122A (en) * | 1978-02-15 | 1980-01-08 | Caterpillar Tractor Co. | Insulated exhaust manifold |
US4972674A (en) * | 1988-05-02 | 1990-11-27 | Ngk Insulators, Ltd. | Heat insulating ceramic insert-cast articles for use in exhaust channels in internal combustion engines and a process for producing the same |
US5816043A (en) * | 1996-01-02 | 1998-10-06 | Acoust-A-Fiber Research And Development, Inc. | Shield encompassing a hot pipe |
US6555070B1 (en) * | 1998-10-05 | 2003-04-29 | Scambia Industrial Developments Ag | Exhaust component and method for producing an exhaust component |
US20060156958A1 (en) * | 2003-05-06 | 2006-07-20 | Simmons Jason A | Thermal protective coating |
US6966402B2 (en) * | 2003-06-02 | 2005-11-22 | Dana Corporation | Acoustical heat shield |
US20100005792A1 (en) * | 2008-07-09 | 2010-01-14 | Ibiden Co., Ltd. | Heat-receiving member and exhaust pipe heat-releasing system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120103458A1 (en) * | 2010-10-20 | 2012-05-03 | Matthias Kroll | Insulating molded part |
US8739837B2 (en) * | 2010-10-20 | 2014-06-03 | Isolite Gmbh | Insulating molded part |
US9488081B2 (en) | 2014-12-17 | 2016-11-08 | Caterpillar Inc. | Exhaust manifold assembly and system |
US9885268B2 (en) | 2015-09-10 | 2018-02-06 | Isolite Gmbh | Reflective insulation system |
US20190226361A1 (en) * | 2018-01-25 | 2019-07-25 | Man Energy Solutions Se | Turbocharger |
CN110080840A (en) * | 2018-01-25 | 2019-08-02 | 曼恩能源方案有限公司 | Turbocharger |
Also Published As
Publication number | Publication date |
---|---|
EP2444617A1 (en) | 2012-04-25 |
ES2567710T3 (en) | 2016-04-26 |
EP2444617B1 (en) | 2016-03-23 |
DE102010048973A1 (en) | 2012-04-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ISOLITE GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KROLL, MATTHIAS;BUCHSTEINER, ARMIN;REEL/FRAME:027480/0641 Effective date: 20111222 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |