US20160348565A1 - Segmented Exhaust Manifold Gas Seals - Google Patents
Segmented Exhaust Manifold Gas Seals Download PDFInfo
- Publication number
- US20160348565A1 US20160348565A1 US14/723,822 US201514723822A US2016348565A1 US 20160348565 A1 US20160348565 A1 US 20160348565A1 US 201514723822 A US201514723822 A US 201514723822A US 2016348565 A1 US2016348565 A1 US 2016348565A1
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- US
- United States
- Prior art keywords
- carrier
- compression ring
- exhaust manifold
- composite exhaust
- manifold assembly
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
-
- 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
- F01N13/1827—Sealings specially adapted for exhaust systems
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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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
-
- 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
-
- 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
- F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
- F01N13/1844—Mechanical joints
- F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like
-
- 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
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
-
- 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
- F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
- F01N2450/24—Methods or apparatus for fitting, inserting or repairing different elements by bolts, screws, rivets or the like
Definitions
- the present disclosure is related to a seal in an engine exhaust system and more specifically to a seal for a segmented exhaust manifold assembly.
- An internal combustion engine can employ an exhaust manifold to direct combustion products away from the engine's combustion chambers. These combustion products, making up exhaust gases, are instead channeled out to the ambient environment.
- the engine's exhaust manifold may be formed as a single unitary body featuring a number of exhaust inlets interconnected with respective cylinders in fluid communication with corresponding combustion chambers.
- manifold assemblies include a number of individual manifold segments, each segment typically connected to an associated cylinder of the internal combustion engine to receive the combustion products therefrom.
- the manifold segments may be joined via slip joints and/or bolts extending through flanges of adjacent manifold segments.
- the manifold segments may be configured to accommodate varying distances between the respective segments allowing for thermal expansion and contraction during periods of operation and inactivity of the internal combustion engine.
- seal rings known in the art have a tendency to fatigue and leak over time as a result of the engine's high temperature and high motion environment.
- U.S. Pat. No. 4,641,861 provides a seal having a flexible joint, especially adapted for pipes in an exhaust system of an engine is disclosed.
- the patent discloses a locking ring is disposed over a flared end of the first pipe and a stop flange and a slidable locking flange are both provided on the second pipe with a wave spring disposed between them.
- a sealing ring having a spherical surface is positioned by a sealing socket in the flared end of the first pipe.
- Bayonet coupling members on the locking ring and on the locking flange, respectively, are provided to assemble the joint by pressing the locking ring and the locking flange together against the resistance of the wave spring and rotating them relative to one another to engage the bayonet coupling.
- the active seal created however remains subject to leaking at the connections joining the individual pipes.
- an assembly in an aspect, includes a first manifold segment having a first fluid conduit formed therein and having a flange at a first end of the first manifold segment, a first carrier disposed adjacent the flange, the first carrier defining at least a portion of a first internal surface, a first recessed portion disposed adjacent the first carrier; a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent the first internal surface, and a compression ring disposed adjacent the first recessed portion.
- a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment; a first carrier coupled to the flange, wherein the first carrier defines at least a portion of a first recess and a portion of a second recess; a first compression ring disposed adjacent the first recess; a second compression ring disposed adjacent the second recess, wherein the second compression ring has a concave curvature or concave polygonal cross-section, wherein an interior angle is oriented towards the first compression ring; and a second manifold segment having a second fluid conduit formed therein, the second manifold disposed adjacent an internal surface of the first carrier, wherein the first and second compression rings provide sealing engagement between the second manifold and the first carrier.
- a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment; a first carrier coupled to the flange; a first recessed portion formed in the first end of the first carrier; a spring element disposed adjacent the first recessed portion; a compression ring disposed adjacent the spring element; and a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent an internal surface of the first carrier, wherein the spring biases the compression ring to provide sealing engagement between the second manifold segment and the first carrier.
- FIG. 1 is a schematic diagram of an internal combustion engine with a segmented exhaust manifold assembly in accordance with aspects of the present disclosure.
- FIG. 2 is a schematic diagram of a portion of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure.
- FIG. 3 is a cross-sectional view of the segmented exhaust manifold assembly of FIG. 2 in accordance with aspects of the present disclosure.
- FIG. 4 is an exploded view of a first compression ring in accordance with aspects of the present disclosure.
- FIG. 5 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure.
- FIG. 6 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure.
- FIG. 7 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure.
- a slip-fit assembly for a segmented exhaust manifold may be configured to deliver a radial and axial force to seal the connected manifold segments to prevent exhaust leakage in the manifold assembly. In several embodiments further described in more detail below, this may be accomplished by incorporating compression rings and recessed portions into one or more carriers coupled to a flange of a manifold segment.
- FIG. 1 illustrates an internal combustion engine 100 having an exhaust manifold assembly 102 .
- the exhaust manifold assembly 102 includes a plurality of manifold segments 104 , for example, a first manifold segment 104 A and a second manifold segment 104 B in fluid communication with each other.
- each of the manifold segments 104 may be in fluid communication with respective combustion cylinders 106 of the internal combustion engine 100 .
- the combustion cylinders 106 may form a cylinder bank 108 from which the manifold segments 104 receive an exhaust gas combustion product.
- the manifold segments 104 and the cylinder bank 108 may be in fluid communication via an exhaust passage (not shown).
- a cylinder head 110 may be secured to the engine 100 adjacent the cylinder bank 108 of combustion cylinders 106 .
- the present disclosure relates to a slip-fit assembly 112 configured to minimize and/or prevent this seepage of exhaust gases from the connected manifold segments 104 in the exhaust manifold assembly 102 .
- the slip-fit assembly 112 fluidly connects two manifold segments, e.g., 104 A and 104 B and may include a flange 214 , a first carrier 216 , and a second carrier 218 .
- the flange 214 may be disposed at a first end 222 of the first manifold segment 104 A.
- the first carrier 216 may be coupled to the flange 214 of the first manifold segment 104 A by one or more coupling mechanisms 220 such as bolt and nut mechanisms.
- the first carrier 216 may be spaced from the flange 214 , for example, such that the second carrier 218 may be disposed between the first carrier 216 and the flange 214 of the first manifold segment 104 A.
- the coupling mechanisms 220 may couple both the first and second carriers 216 , 218 to the flange 214 , whereby the second carrier 218 is positioned between the first carrier 216 and the flange 214 and the second carrier 218 is subject to a compression force provided by the coupling mechanisms 220 and the first carrier 216 .
- the first carrier 216 and the second carrier 218 may include a through hole and may collectively define a first internal surface 332 along an internal periphery of each of the first and second carriers 216 , 218 .
- the first internal surface 332 may be sized to have a diameter configured to receive at least a portion of one of the manifold segments 104 such as the second manifold segment 104 B.
- the first and second carriers 216 , 218 may receive the second manifold segment 104 B and allow a fluid conduit 324 of the first manifold segment 104 A to be in fluid communication with a fluid conduit 338 of the second manifold segment 104 B.
- the second manifold segment 104 B may have a first end 336 that is disposed substantially at a 90 degree (°) angle to the first internal surface 332 .
- substantially at a 90° angle can mean that the deviation as an angle measured relative to the normal first internal surface 332 is less than or equal to 10%.
- a gap 334 may be defined between by the first end 336 and the flange 214 .
- first manifold segment 104 A, the second manifold segment 104 B, the first carrier 216 , and the second carrier 218 may be cast from the same material or materials having a same or similar thermal profile. A same or similar thermal profile between the materials may ensure that the first manifold segment 104 A, the second manifold segment 104 B, the first carrier 216 , and the second carrier 218 exhibit comparable thermal expansion and contraction properties. At elevated temperature and pressure during operation of the engine 100 , comparable thermal expansion and contraction properties can facilitate the generation of a sealing force in axial and radial directions within the slip fit assembly 112 . In various aspects, one or more compression rings may be included in the slip fit assembly 112 to provide sealing engagement between the manifold segments 104 .
- a first recessed portion 340 may be disposed in a first end 326 of the first carrier 216 .
- the first recessed portion 340 may be disposed in the first end 326 of the first carrier 216 abutting a first end 330 of the second carrier 218 opposite a second end 328 of the first carrier 216 .
- the first recessed portion 340 may be disposed adjacent to the first internal surface 332 .
- the first recessed portion 340 is configured such that the first carrier 216 may accommodate a compression ring 342 .
- the compression ring 342 may be disposed around an outer periphery of the second manifold segment 104 B and may be in sealing engagement therewith.
- the compression ring 342 configured with the first carrier 216 and second carrier 218 , may deliver a radial, elastic restoring force between the first carrier 216 and second manifold segment 104 B disposed therein and deliver an axial, elastic restoring force between the first and second carriers 216 , 218 .
- the recessed portions included in embodiments of the present disclosure may have a have a particular shape or geometry.
- the first recessed portion 340 may be annular and may have a generally rectangular cross-section.
- Alternative shapes, such as round or triangular or polygonal, may be the cross-sectional geometry of the recessed portions in the various embodiments disclosed herein.
- the compression ring 342 may include an outer shell 444 having a mesh core 446 or interior.
- the outer shell 444 may include a split housing having a first shell portion 444 A and a second shell portion 444 B.
- the first and second shell portions 444 A, 444 B may be coupled together to secure the mesh core 446 therebetween.
- first and second shell portions 444 A, 444 B may be moveable coupled to each other such that a restoring force of the compressed mesh core 446 may provide radial and axial forces on the first and second shell portions 444 A, 444 B.
- the mesh core 446 may be a compressible wire mesh ring.
- the shell 444 and the mesh core 446 may be composed of an appropriate high-temperature metal.
- a high-temperature metal may refer to a metal which exhibits resistance to deformation at high temperatures, such as above 450° F. These metals may include, but are not limited to, stainless steel or a nickel-chromium alloy.
- FIG. 5 is a partial cross-sectional view of a slip fit assembly 500 similar to the slip fit assembly 112 , except as described below.
- a first carrier 516 and a second carrier 518 may define a first internal surface 532 .
- the first carrier 516 may have a first recessed portion 540 formed at a first end 526 of the first carrier 516 and the second carrier 518 may have a second recessed portion 552 formed at a first end 530 of the second carrier 518 .
- the first end 526 of the first carrier 516 may abut the first end 530 of the second carrier 518 .
- the first recessed portion 540 and the second recessed portion 552 may accommodate a first compression ring 548 .
- the first compression ring 548 may include a mesh ring.
- the first compression ring 548 may include a woven mesh having a high temperature filler.
- the woven mesh of the first compression ring 548 may include coarse austenite (gamma-phase iron) stainless steel.
- the high temperature filler may include materials suitable for temperatures between 450° F. and 1200° F.
- the high temperature filler of the woven mesh may include graphite or mica.
- the woven mesh may exhibit dampening qualities during operation of the internal combustion engine.
- the woven mesh ring having high temperature filler can reduce the wear inside the assembly 500 and reduce motion.
- first recessed portion 540 and the second recessed portion 552 may have a certain shape and certain cross-sectional geometries.
- the recessed portions 540 , 548 may both be annular.
- a third recessed portion 554 may be formed in a second end 528 of the first carrier 516 , thereby defining a second internal surface 536 .
- the third recessed portion 554 is disposed adjacent the second manifold segment 104 B, while the second manifold segment 104 B is disposed adjacent the first and second carriers 516 , 518 .
- the third recessed portion 554 may have a particular shape or geometry.
- the third recessed portion 554 may be annular and have a generally rectangular cross-section.
- the third recessed portion 554 may include a second compression ring 558 disposed therein.
- the second compression ring may 558 be disposed adjacent a portion of the second internal surface 536 .
- the second compression ring 558 may be configured to deliver a radial, elastic restoring force between the first carrier 216 and second manifold segment 104 B disposed therein and to deliver an axial, elastic restoring force between the first and second carriers 216 , 218 and ultimately throughout the assembly 500 .
- the shape or geometry of the second compression ring 558 may contribute to the axial elastic restoring force delivered.
- the second compression ring 558 may have a concave curvature or concave polygonal cross-section.
- the concave curvature may be oriented such that the curvature has its opening oriented toward the first compression ring 548 and so that the concave curvature abuts a portion of the second internal surface 536 formed by the third recessed portion 554 .
- the second compression ring 558 has an interior angle 560 .
- the interior angle 560 may be oriented toward the first end 526 of the first carrier 516 .
- the concave polygonal cross-section shape may be described as V-shaped, U-shaped, and the like.
- the concave geometry of the second compression ring 558 allows the second compression ring 558 to provide an axial elastic restoring force on a portion of the second internal surface 536 .
- the geometry of the second compression ring 558 can exploit the pressure generated during operation of the internal combustion engine to force the second compression ring 558 open and thereby facilitate the seal of the slip fit assembly 500 .
- a fourth recessed portion 562 may be formed at the second end 528 of the first carrier 516 .
- the fourth recessed portion may have a particular shape, such as for example, annular and having a generally rectangular cross-section.
- the fourth recessed portion 562 may define a third internal surface 564 .
- the fourth recessed portion 562 may include an annular retainer 566 disposed therein.
- the annular retainer 566 may be disposed adjacent a portion of the third internal surface 564 formed by the fourth recessed portion 562 of the first carrier 516 .
- the annular retainer may be disposed adjacent the second end 528 of the first carrier 516 such that the second compression ring 558 is disposed between the annular retainer 566 and a portion of the first carrier 516 .
- the assembly 600 as provided in FIG. 6 is similar to that of the assembly 112 , 500 presented in FIGS. 1, 2, and 5 , except that the embodiment includes altered configurations.
- FIG. 6 presents a full cross-sectional view of an embodiment of the assembly 600 .
- the assembly 600 may include the flange 214 , the first carrier 616 , the second carrier 618 , the one or more recessed portions 640 , 652 , and the compression ring 648 .
- the flange 214 , the second carrier 618 , and the first carrier 616 may be joined by a coupling mechanism 620 such as a bolt.
- the first carrier 616 may include a first recessed portion 640 and the second carrier 618 may include a second recessed portion 652 formed therein and configured to accommodate the compression ring 648 and a spring 668 .
- first recessed portion 640 and the second recessed portion 652 may have particular shapes.
- the recessed portions 640 , 652 may both be annular.
- the first recessed portion 640 may have a right triangular or a trapezoidal cross-sectional geometry to accommodate the compression ring 648 .
- the compression ring 648 may have an irregular trapezoidal cross-section in that parallel sides of the trapezoidal cross-section are not the same length.
- the second recessed portion 652 may have a generally rectangular cross section to accommodate the spring 668 .
- the compression ring 648 may be disposed adjacent the second recessed portion 652 within the second carrier 618 .
- the compression ring 648 may be similar to the first compression ring 548 as presented in FIG. 5 .
- the compression ring 648 may similarly include a woven wire mesh having mica filler.
- the spring 668 may be disposed adjacent the first recessed portion 640 of the first carrier 616 .
- the spring 668 may be configured to bias the compression ring 648 against the second carrier 618 to achieve a radial and an axial seal throughout the assembly 600 .
- the spring 668 may be a conical spring washer.
- the conical spring washer also known as a wave washer or a Belleville washer, may deliver an elastic and force to the adjacent compression ring 648 thereby driving an axial force throughout the assembly 600 .
- the spring 668 may be a conical spring washer in series.
- the spring 668 may also be cast of a suitably high-temperature metal. Appropriate high-temperature metals may include stainless steel or a nickel-chromium alloy.
- the assembly 700 is similar to the assembly 600 of FIG. 6 except that the second manifold segment 704 B has an altered configuration.
- the first carrier 716 and the second carrier 718 may define a first internal surface 732 .
- the first carrier 716 may have a first recessed portion 740 formed at a first end 726 of the first carrier 716 and the second carrier 718 may have a second recessed portion 752 formed at a first end 730 of the second carrier 718 .
- the first end 726 of the first carrier 716 may abut the first end 730 of the second carrier 718 .
- the second manifold segment 704 B may define a second fluid conduit 738 and may include a shoulder 770 spaced from a second end 772 thereof.
- the shoulder 770 may include a raised portion along the second manifold segment 704 B and may abut a portion of the first internal surface 732 of the first carrier 716 .
- the shoulder 770 may be situated such that a first compression ring 748 is disposed adjacent the shoulder 770 and adjacent the second recessed portion 752 within the first end 726 of the first carrier 716 .
- the shoulder 770 may provide additional surface area to facilitate the sealing force in the assembly 700 .
- the spring 768 may be disposed in the first recessed portion 740 within the first end 726 of the second carrier 716 .
- the spring 768 may be disposed adjacent the first compression ring 748 .
- the spring 768 may be a conical spring washer.
- the spring 768 may include a conical spring washer in series.
- the first compression ring 748 may be disposed in the first recessed portion 740 within the first end 726 of the first carrier 716 .
- the first compression ring 748 may be disposed adjacent the second recessed portion 752 within the second carrier 718 .
- the first compression ring 748 may be similar to the first compression ring 548 as presented in FIG. 5 .
- the first compression ring 748 may include a woven wire mesh having mica filler.
- first compression ring 748 may include a polygonal cross-sectional geometry such, for example, as a pentagonal cross-section. However other shapes can be used.
- the polygonal cross-section may be formed in the first compression ring 748 comprising the woven mesh and mica filler as the first compression ring 748 is configured to fit within the first recessed portion 740 of the first carrier 716 and abuts the shoulder 770 as shown in FIG. 7 .
- any portion of the first or second carriers 216 , 218 , 516 , 518 , 616 , 618 , 716 , 718 can be integrated with the flange 214 .
- the flange 214 may include the first carrier 216 , 516 , 616 , 716 .
- the configuration can provide additional stability throughout the assembly 112 , 500 , 600 , 700 and facilitate sealing of the slip fit assembly 112 , 500 , 600 , 700 .
- the assembly 112 , 500 , 600 , 700 can comprise only a single carrier, the first carrier 216 , 516 , 616 , 716 integrated with the flange 214 .
- the one or more recessed portions 540 , 552 , 554 , 562 , 640 , 652 , 740 , 752 and one or more compression rings 342 , 548 , 558 , 648 , 748 may be disposed within the first carrier 216 , 516 , 616 , 716 .
- the first carrier 216 , 516 , 616 , 716 and the second carrier 218 , 518 , 618 , 718 may be congruent parts with the exception of the configuration of the one or more recessed portions 540 , 552 , 554 , 562 , 640 , 652 , 740 , 752 . More specifically, the first carrier 216 , 516 , 616 , 716 and the second carrier 218 , 518 , 618 , 718 may be configured such that the first carrier 216 , 516 , 616 , 716 and the second carrier 218 , 518 , 618 , 718 are symmetrical and/or interchangeable.
- the symmetry of the first carrier 216 , 516 , 616 , 716 and the second carrier 218 , 518 , 618 , 718 may allow for variation in the configuration of the assembly 112 , 500 , 600 , 700 with respect to the positioning of the one or more recessed portions 540 , 552 , 554 , 562 , 640 , 652 , 740 , 752 . Further, the uniformity of the carriers 216 , 218 , 516 , 518 , 616 , 618 , 716 , 718 allows for minimal design modification to achieve comparable sealing in an existing slip joint exhaust manifold assembly.
- the assembly 112 , 500 , 600 , 700 as disclosed herein may be readily adaptable as the geometries of the first carrier 216 , 516 , 616 , 716 and the second carrier 218 , 518 , 618 , 718 are similar and thus similarly apt for alternative configurations of the one or more recessed portions 540 , 552 , 554 , 562 , 640 , 652 , 740 , 752 .
- first manifold 104 A, second manifold 104 B and the flange 214 may have a coating deposited thereon.
- the coating can comprise a hardening agent configured harden the surface of the first manifold 104 A, second manifold 104 B and the flange 214 to limit, for example minimize, wear on the assembly 112 , 500 , 600 , 700 .
- the assembly may be used with various internal combustion engines having a segmented exhaust manifold assembly.
- the various operational modes of the assembly may cater to various operational requirements and/or malfunctions of the segmented exhaust manifold system.
- the assembly of the present disclosure may be configured to provide a radial and axial seal at the junction of individual manifold segments across a spectrum of operational conditions. Such continued load application of the radial and axial seal force may prevent the leakage of exhaust gases from the segmented manifold assembly.
- the assembly may be configured to deliver a positive, elastic force at manifold segment joints whether the engine is cooling or is engaged at elevated temperatures, from, for example, about 450° C. to about 750° C.
- a nominal gap can be present in the conventional assembly along the first internal surface between the first and second carrier and the second manifold segment.
- the nominal gap provides a clearance to allow for thermal expansion of the assembly as the engine 100 rises in temperature.
- the first manifold segment and the second manifold segment can be in contact, ultimately wearing down the surfaces of second manifold assembly and diminishing the seal in the slip fit joint. Accordingly, in the conventional assembly, the elastic restoring force may be diminished.
- FIG. 6 presents an operational mode of assembly 600 .
- the flange 214 of the first manifold segment 104 A, the first carrier 616 , and the second carrier 618 are coupled together via a coupling mechanism 620 , such as a bolt.
- the first carrier 616 includes the first recessed portion 640 and the second carrier 618 includes the second recessed portion 652 .
- the recessed portions 640 , 652 are adjacent one another at the contiguous first end 626 of the first carrier 616 and first end 630 of the second carrier 618 .
- Within the recessed portions 640 , 652 are disposed the compression ring 648 and a spring 668 .
- combustion products are directed away from combustion chambers to the surrounding environment via their respective cylinders in fluid communication with the manifold segments 104 of the exhaust manifold assembly 112 , 500 , 600 , 700 .
- the assembly 112 , 500 , 600 , 700 disclosed herein each are configured to minimize, for example prevent, leakage of exhaust gases from connections between adjacent manifold segments 104 .
- thermal expansion and contraction of the assembly 600 may occur.
- the compression ring 648 and the adjacent spring 668 may cooperate to provide a sustained elastic restoring force at the connection of the manifold segments 104 , for example the first manifold segment 104 A and the second manifold segment 104 B, in radial and axial directions.
- the sustained force may establish a seal thereby preventing the release of exhaust outside of the segmented manifold assembly 102 .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Exhaust Silencers (AREA)
Abstract
System and methods for preventing leakage of exhaust gasses in the segmented manifold of an engine system are disclosed. In an aspect, an assembly includes a first manifold, a flange, and a first carrier and a second carrier having recessed portions configured to accommodate compressions rings to deliver a sealing force.
Description
- The present disclosure is related to a seal in an engine exhaust system and more specifically to a seal for a segmented exhaust manifold assembly.
- An internal combustion engine can employ an exhaust manifold to direct combustion products away from the engine's combustion chambers. These combustion products, making up exhaust gases, are instead channeled out to the ambient environment. In some instances, the engine's exhaust manifold may be formed as a single unitary body featuring a number of exhaust inlets interconnected with respective cylinders in fluid communication with corresponding combustion chambers.
- Also common in combustion engine systems are segmented exhaust manifold assemblies. These manifold assemblies include a number of individual manifold segments, each segment typically connected to an associated cylinder of the internal combustion engine to receive the combustion products therefrom. The manifold segments may be joined via slip joints and/or bolts extending through flanges of adjacent manifold segments. The manifold segments may be configured to accommodate varying distances between the respective segments allowing for thermal expansion and contraction during periods of operation and inactivity of the internal combustion engine.
- One problem which may arise in internal combustion engines utilizing a segmented manifold assembly is that the bolted connection and generally planar surfaces between the two flanges, or between the male and female manifold portions of the slip joint, may not provide a sufficient seal thereby allowing exhaust gases to leak from the manifold assembly. Gaskets or sealants may also be used in a flanged connection between the exhaust connector and manifold segments. Conventional techniques of compensation for thermal expansion have also involved the use of seal rings. As an example, to compensate for thermal expansion during operation of the internal combustion engine and thermal contraction after operation is complete in a segmented exhaust manifold, a seal may be used in combination with the flanged connection.
- Still, conventional segmented exhaust manifold assemblies can experience leakage whether flanged or slip jointed connections are employed. For example, seal rings known in the art have a tendency to fatigue and leak over time as a result of the engine's high temperature and high motion environment.
- U.S. Pat. No. 4,641,861 provides a seal having a flexible joint, especially adapted for pipes in an exhaust system of an engine is disclosed. The patent discloses a locking ring is disposed over a flared end of the first pipe and a stop flange and a slidable locking flange are both provided on the second pipe with a wave spring disposed between them. A sealing ring having a spherical surface is positioned by a sealing socket in the flared end of the first pipe. Bayonet coupling members on the locking ring and on the locking flange, respectively, are provided to assemble the joint by pressing the locking ring and the locking flange together against the resistance of the wave spring and rotating them relative to one another to engage the bayonet coupling. The active seal created however remains subject to leaking at the connections joining the individual pipes.
- These and other shortcomings of the prior art are addressed by the present disclosure.
- In an aspect, an assembly includes a first manifold segment having a first fluid conduit formed therein and having a flange at a first end of the first manifold segment, a first carrier disposed adjacent the flange, the first carrier defining at least a portion of a first internal surface, a first recessed portion disposed adjacent the first carrier; a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent the first internal surface, and a compression ring disposed adjacent the first recessed portion.
- In an aspect, a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment; a first carrier coupled to the flange, wherein the first carrier defines at least a portion of a first recess and a portion of a second recess; a first compression ring disposed adjacent the first recess; a second compression ring disposed adjacent the second recess, wherein the second compression ring has a concave curvature or concave polygonal cross-section, wherein an interior angle is oriented towards the first compression ring; and a second manifold segment having a second fluid conduit formed therein, the second manifold disposed adjacent an internal surface of the first carrier, wherein the first and second compression rings provide sealing engagement between the second manifold and the first carrier.
- In an aspect, a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment; a first carrier coupled to the flange; a first recessed portion formed in the first end of the first carrier; a spring element disposed adjacent the first recessed portion; a compression ring disposed adjacent the spring element; and a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent an internal surface of the first carrier, wherein the spring biases the compression ring to provide sealing engagement between the second manifold segment and the first carrier.
-
FIG. 1 is a schematic diagram of an internal combustion engine with a segmented exhaust manifold assembly in accordance with aspects of the present disclosure. -
FIG. 2 is a schematic diagram of a portion of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure. -
FIG. 3 is a cross-sectional view of the segmented exhaust manifold assembly ofFIG. 2 in accordance with aspects of the present disclosure. -
FIG. 4 is an exploded view of a first compression ring in accordance with aspects of the present disclosure. -
FIG. 5 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure. -
FIG. 6 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure. -
FIG. 7 is a cross-sectional view of a segmented exhaust manifold assembly in accordance with aspects of the present disclosure. - The present disclosure is directed towards improving a slip fit joint. In one aspect of the present disclosure, a slip-fit assembly for a segmented exhaust manifold may be configured to deliver a radial and axial force to seal the connected manifold segments to prevent exhaust leakage in the manifold assembly. In several embodiments further described in more detail below, this may be accomplished by incorporating compression rings and recessed portions into one or more carriers coupled to a flange of a manifold segment.
-
FIG. 1 illustrates aninternal combustion engine 100 having anexhaust manifold assembly 102. Theexhaust manifold assembly 102 includes a plurality ofmanifold segments 104, for example, afirst manifold segment 104A and asecond manifold segment 104B in fluid communication with each other. As shown inFIG. 1 , each of themanifold segments 104 may be in fluid communication withrespective combustion cylinders 106 of theinternal combustion engine 100. Thecombustion cylinders 106 may form acylinder bank 108 from which themanifold segments 104 receive an exhaust gas combustion product. Themanifold segments 104 and thecylinder bank 108 may be in fluid communication via an exhaust passage (not shown). As shown, acylinder head 110 may be secured to theengine 100 adjacent thecylinder bank 108 ofcombustion cylinders 106. - As an illustrative example, as pressure builds and temperatures rise in the
combustion engine 100, leakage may occur between themanifold segments 104 where a conventional slip fit joints may not provide an adequate seal. The present disclosure relates to a slip-fit assembly 112 configured to minimize and/or prevent this seepage of exhaust gases from the connectedmanifold segments 104 in theexhaust manifold assembly 102. - Referring to
FIG. 2 , the slip-fit assembly 112 fluidly connects two manifold segments, e.g., 104A and 104B and may include aflange 214, afirst carrier 216, and asecond carrier 218. In one aspect, theflange 214 may be disposed at afirst end 222 of thefirst manifold segment 104A. Thefirst carrier 216 may be coupled to theflange 214 of thefirst manifold segment 104A by one ormore coupling mechanisms 220 such as bolt and nut mechanisms. Thefirst carrier 216 may be spaced from theflange 214, for example, such that thesecond carrier 218 may be disposed between thefirst carrier 216 and theflange 214 of thefirst manifold segment 104A. As such, thecoupling mechanisms 220 may couple both the first andsecond carriers flange 214, whereby thesecond carrier 218 is positioned between thefirst carrier 216 and theflange 214 and thesecond carrier 218 is subject to a compression force provided by thecoupling mechanisms 220 and thefirst carrier 216. - Referring to
FIG. 3 , thefirst carrier 216 and thesecond carrier 218 may include a through hole and may collectively define a firstinternal surface 332 along an internal periphery of each of the first andsecond carriers internal surface 332 may be sized to have a diameter configured to receive at least a portion of one of themanifold segments 104 such as thesecond manifold segment 104B. As such, the first andsecond carriers second manifold segment 104B and allow afluid conduit 324 of thefirst manifold segment 104A to be in fluid communication with afluid conduit 338 of thesecond manifold segment 104B. - In certain aspects, the
second manifold segment 104B may have afirst end 336 that is disposed substantially at a 90 degree (°) angle to the firstinternal surface 332. As used herein, the term “substantially at a 90° angle” can mean that the deviation as an angle measured relative to the normal firstinternal surface 332 is less than or equal to 10%. As thesecond manifold segment 104B is disposed adjacent the firstinternal surface 332, agap 334 may be defined between by thefirst end 336 and theflange 214. - In some aspects, the
first manifold segment 104A, thesecond manifold segment 104B, thefirst carrier 216, and thesecond carrier 218 may be cast from the same material or materials having a same or similar thermal profile. A same or similar thermal profile between the materials may ensure that thefirst manifold segment 104A, thesecond manifold segment 104B, thefirst carrier 216, and thesecond carrier 218 exhibit comparable thermal expansion and contraction properties. At elevated temperature and pressure during operation of theengine 100, comparable thermal expansion and contraction properties can facilitate the generation of a sealing force in axial and radial directions within theslip fit assembly 112. In various aspects, one or more compression rings may be included in theslip fit assembly 112 to provide sealing engagement between themanifold segments 104. - A first recessed
portion 340 may be disposed in afirst end 326 of thefirst carrier 216. The first recessedportion 340 may be disposed in thefirst end 326 of thefirst carrier 216 abutting afirst end 330 of thesecond carrier 218 opposite asecond end 328 of thefirst carrier 216. The first recessedportion 340 may be disposed adjacent to the firstinternal surface 332. The first recessedportion 340 is configured such that thefirst carrier 216 may accommodate acompression ring 342. As an example, when thesecond manifold segment 104B is disposed adjacent the firstinternal surface 332 so that thesecond manifold segment 104B is positioned within thecarriers compression ring 342 may be disposed around an outer periphery of thesecond manifold segment 104B and may be in sealing engagement therewith. As such, thecompression ring 342, configured with thefirst carrier 216 andsecond carrier 218, may deliver a radial, elastic restoring force between thefirst carrier 216 andsecond manifold segment 104B disposed therein and deliver an axial, elastic restoring force between the first andsecond carriers - As presented in
FIGS. 3, 5, 6, and 7 , the recessed portions included in embodiments of the present disclosure may have a have a particular shape or geometry. In one example, the first recessedportion 340 may be annular and may have a generally rectangular cross-section. Alternative shapes, such as round or triangular or polygonal, may be the cross-sectional geometry of the recessed portions in the various embodiments disclosed herein. - Referring to
FIGS. 3 and 4 , thecompression ring 342 may include anouter shell 444 having amesh core 446 or interior. According to one aspect of the disclosure, theouter shell 444 may include a split housing having afirst shell portion 444A and asecond shell portion 444B. The first andsecond shell portions mesh core 446 therebetween. In certain embodiments, first andsecond shell portions compressed mesh core 446 may provide radial and axial forces on the first andsecond shell portions mesh core 446 may be a compressible wire mesh ring. As an example, theshell 444 and themesh core 446 may be composed of an appropriate high-temperature metal. As one skilled in the art might appreciate, a high-temperature metal may refer to a metal which exhibits resistance to deformation at high temperatures, such as above 450° F. These metals may include, but are not limited to, stainless steel or a nickel-chromium alloy. -
FIG. 5 is a partial cross-sectional view of a slipfit assembly 500 similar to the slipfit assembly 112, except as described below. In one aspect, afirst carrier 516 and asecond carrier 518 may define a firstinternal surface 532. Thefirst carrier 516 may have a first recessedportion 540 formed at afirst end 526 of thefirst carrier 516 and thesecond carrier 518 may have a second recessedportion 552 formed at afirst end 530 of thesecond carrier 518. Thefirst end 526 of thefirst carrier 516 may abut thefirst end 530 of thesecond carrier 518. As such, the first recessedportion 540 and the second recessedportion 552 may accommodate afirst compression ring 548. - In an aspect, the
first compression ring 548 may include a mesh ring. As an example, thefirst compression ring 548 may include a woven mesh having a high temperature filler. The woven mesh of thefirst compression ring 548 may include coarse austenite (gamma-phase iron) stainless steel. The high temperature filler may include materials suitable for temperatures between 450° F. and 1200° F. As an example, the high temperature filler of the woven mesh may include graphite or mica. The woven mesh may exhibit dampening qualities during operation of the internal combustion engine. As an example, the woven mesh ring having high temperature filler can reduce the wear inside theassembly 500 and reduce motion. - In one aspect, the first recessed
portion 540 and the second recessedportion 552 may have a certain shape and certain cross-sectional geometries. For example, the recessedportions - A third recessed
portion 554 may be formed in asecond end 528 of thefirst carrier 516, thereby defining a secondinternal surface 536. As such, the third recessedportion 554 is disposed adjacent thesecond manifold segment 104B, while thesecond manifold segment 104B is disposed adjacent the first andsecond carriers portion 554 may have a particular shape or geometry. For example, the third recessedportion 554 may be annular and have a generally rectangular cross-section. The third recessedportion 554 may include asecond compression ring 558 disposed therein. - In various aspects, the second compression ring may 558 be disposed adjacent a portion of the second
internal surface 536. Thesecond compression ring 558 may be configured to deliver a radial, elastic restoring force between thefirst carrier 216 andsecond manifold segment 104B disposed therein and to deliver an axial, elastic restoring force between the first andsecond carriers assembly 500. The shape or geometry of thesecond compression ring 558 may contribute to the axial elastic restoring force delivered. In some aspects of the present disclosure, thesecond compression ring 558 may have a concave curvature or concave polygonal cross-section. For a concave curvature cross-sectional geometry of thesecond compression ring 558, the concave curvature may be oriented such that the curvature has its opening oriented toward thefirst compression ring 548 and so that the concave curvature abuts a portion of the secondinternal surface 536 formed by the third recessedportion 554. For a concave polygonal cross-section shape, thesecond compression ring 558 has aninterior angle 560. Theinterior angle 560 may be oriented toward thefirst end 526 of thefirst carrier 516. In some aspects, the concave polygonal cross-section shape may be described as V-shaped, U-shaped, and the like. The concave geometry of thesecond compression ring 558, allows thesecond compression ring 558 to provide an axial elastic restoring force on a portion of the secondinternal surface 536. In various embodiments of the present disclosure, the geometry of thesecond compression ring 558 can exploit the pressure generated during operation of the internal combustion engine to force thesecond compression ring 558 open and thereby facilitate the seal of the slipfit assembly 500. - A fourth recessed
portion 562 may be formed at thesecond end 528 of thefirst carrier 516. As noted herein, the fourth recessed portion may have a particular shape, such as for example, annular and having a generally rectangular cross-section. The fourth recessedportion 562 may define a thirdinternal surface 564. To secure thesecond compression ring 558 within the third recessedportion 554 and to provide rigidity or stability within theassembly 500, the fourth recessedportion 562 may include anannular retainer 566 disposed therein. Theannular retainer 566 may be disposed adjacent a portion of the thirdinternal surface 564 formed by the fourth recessedportion 562 of thefirst carrier 516. In an aspect, the annular retainer may be disposed adjacent thesecond end 528 of thefirst carrier 516 such that thesecond compression ring 558 is disposed between theannular retainer 566 and a portion of thefirst carrier 516. - The
assembly 600 as provided inFIG. 6 is similar to that of theassembly FIGS. 1, 2, and 5 , except that the embodiment includes altered configurations.FIG. 6 presents a full cross-sectional view of an embodiment of theassembly 600. Theassembly 600 may include theflange 214, thefirst carrier 616, thesecond carrier 618, the one or more recessedportions compression ring 648. - As shown in
FIG. 6 , theflange 214, thesecond carrier 618, and thefirst carrier 616 may be joined by a coupling mechanism 620 such as a bolt. Further, thefirst carrier 616 may include a first recessedportion 640 and thesecond carrier 618 may include a second recessedportion 652 formed therein and configured to accommodate thecompression ring 648 and aspring 668. - As noted above, the first recessed
portion 640 and the second recessedportion 652 may have particular shapes. In one example, the recessedportions FIG. 6 , the first recessedportion 640 may have a right triangular or a trapezoidal cross-sectional geometry to accommodate thecompression ring 648. Thecompression ring 648 may have an irregular trapezoidal cross-section in that parallel sides of the trapezoidal cross-section are not the same length. The second recessedportion 652 may have a generally rectangular cross section to accommodate thespring 668. - The
compression ring 648 may be disposed adjacent the second recessedportion 652 within thesecond carrier 618. Thecompression ring 648 may be similar to thefirst compression ring 548 as presented inFIG. 5 . Thecompression ring 648 may similarly include a woven wire mesh having mica filler. - The
spring 668 may be disposed adjacent the first recessedportion 640 of thefirst carrier 616. In this configuration, thespring 668 may be configured to bias thecompression ring 648 against thesecond carrier 618 to achieve a radial and an axial seal throughout theassembly 600. Thespring 668 may be a conical spring washer. The conical spring washer, also known as a wave washer or a Belleville washer, may deliver an elastic and force to theadjacent compression ring 648 thereby driving an axial force throughout theassembly 600. In a further aspect, thespring 668 may be a conical spring washer in series. Thespring 668 may also be cast of a suitably high-temperature metal. Appropriate high-temperature metals may include stainless steel or a nickel-chromium alloy. - Referring to
FIG. 6 , theassembly 700 is similar to theassembly 600 ofFIG. 6 except that thesecond manifold segment 704B has an altered configuration. Thefirst carrier 716 and thesecond carrier 718 may define a firstinternal surface 732. Thefirst carrier 716 may have a first recessedportion 740 formed at afirst end 726 of thefirst carrier 716 and thesecond carrier 718 may have a second recessedportion 752 formed at afirst end 730 of thesecond carrier 718. Thefirst end 726 of thefirst carrier 716 may abut thefirst end 730 of thesecond carrier 718. - The
second manifold segment 704B may define a secondfluid conduit 738 and may include ashoulder 770 spaced from asecond end 772 thereof. As such, theshoulder 770 may include a raised portion along thesecond manifold segment 704B and may abut a portion of the firstinternal surface 732 of thefirst carrier 716. Theshoulder 770 may be situated such that afirst compression ring 748 is disposed adjacent theshoulder 770 and adjacent the second recessedportion 752 within thefirst end 726 of thefirst carrier 716. Theshoulder 770 may provide additional surface area to facilitate the sealing force in theassembly 700. - Also depicted in
FIG. 7 , thespring 768 may be disposed in the first recessedportion 740 within thefirst end 726 of thesecond carrier 716. Thespring 768 may be disposed adjacent thefirst compression ring 748. As disclosed herein, thespring 768 may be a conical spring washer. As an example, thespring 768 may include a conical spring washer in series. - The
first compression ring 748 may be disposed in the first recessedportion 740 within thefirst end 726 of thefirst carrier 716. Thefirst compression ring 748 may be disposed adjacent the second recessedportion 752 within thesecond carrier 718. Thefirst compression ring 748 may be similar to thefirst compression ring 548 as presented inFIG. 5 . Thefirst compression ring 748 may include a woven wire mesh having mica filler. - Further, the
first compression ring 748 may include a polygonal cross-sectional geometry such, for example, as a pentagonal cross-section. However other shapes can be used. The polygonal cross-section may be formed in thefirst compression ring 748 comprising the woven mesh and mica filler as thefirst compression ring 748 is configured to fit within the first recessedportion 740 of thefirst carrier 716 and abuts theshoulder 770 as shown inFIG. 7 . - In certain embodiments of the present disclosure, any portion of the first or
second carriers flange 214. In one example, theflange 214 may include thefirst carrier assembly fit assembly assembly first carrier flange 214. As such, the one or more recessedportions first carrier - In various embodiments, the
first carrier second carrier portions first carrier second carrier first carrier second carrier first carrier second carrier assembly portions carriers assembly first carrier second carrier portions - In further aspects, the
first manifold 104A,second manifold 104B and theflange 214 may have a coating deposited thereon. The coating can comprise a hardening agent configured harden the surface of thefirst manifold 104A,second manifold 104B and theflange 214 to limit, for example minimize, wear on theassembly - The assembly, and its respective embodiments presented herein, may be used with various internal combustion engines having a segmented exhaust manifold assembly. The various operational modes of the assembly, as described below, may cater to various operational requirements and/or malfunctions of the segmented exhaust manifold system. Indeed, the assembly of the present disclosure may be configured to provide a radial and axial seal at the junction of individual manifold segments across a spectrum of operational conditions. Such continued load application of the radial and axial seal force may prevent the leakage of exhaust gases from the segmented manifold assembly. Particularly, the assembly may be configured to deliver a positive, elastic force at manifold segment joints whether the engine is cooling or is engaged at elevated temperatures, from, for example, about 450° C. to about 750° C.
- Several operational modes of the assembly will be described hereinafter with reference to
FIGS. 1-7 . - In a conventional internal combustion engine, such as the
engine 100 depicted inFIG. 1 , a nominal gap can be present in the conventional assembly along the first internal surface between the first and second carrier and the second manifold segment. The nominal gap provides a clearance to allow for thermal expansion of the assembly as theengine 100 rises in temperature. At operating temperatures as thermal expansion occurs, the first manifold segment and the second manifold segment can be in contact, ultimately wearing down the surfaces of second manifold assembly and diminishing the seal in the slip fit joint. Accordingly, in the conventional assembly, the elastic restoring force may be diminished. -
FIG. 6 presents an operational mode ofassembly 600. Theflange 214 of thefirst manifold segment 104A, thefirst carrier 616, and thesecond carrier 618 are coupled together via a coupling mechanism 620, such as a bolt. Thefirst carrier 616 includes the first recessedportion 640 and thesecond carrier 618 includes the second recessedportion 652. The recessedportions first end 626 of thefirst carrier 616 andfirst end 630 of thesecond carrier 618. Within the recessedportions compression ring 648 and aspring 668. As thecombustion engine 100 ofFIG. 1 is engaged, combustion products are directed away from combustion chambers to the surrounding environment via their respective cylinders in fluid communication with themanifold segments 104 of theexhaust manifold assembly assembly manifold segments 104. - With respect to
FIG. 6 , as the engine heats upon engagement and cools as it is disengaged, thermal expansion and contraction of theassembly 600 may occur. Thecompression ring 648 and theadjacent spring 668 may cooperate to provide a sustained elastic restoring force at the connection of themanifold segments 104, for example thefirst manifold segment 104A and thesecond manifold segment 104B, in radial and axial directions. The sustained force may establish a seal thereby preventing the release of exhaust outside of thesegmented manifold assembly 102. - While aspects of the present disclosure have been particularly shown and described with reference to the embodiments above, it will be understood by those skilled in the art that various additional embodiments may be contemplated by the modification of the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to fall within the scope of the present disclosure as determined based upon the claims and any equivalents thereof.
Claims (20)
1. A composite exhaust manifold assembly comprising:
a first manifold segment having a first fluid conduit formed therein and having a flange at a first end thereof;
a first carrier disposed adjacent the flange, the first carrier defining at least a portion of a first internal surface,
a first recessed portion disposed adjacent the first carrier;
a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent the first internal surface; and
a compression ring disposed adjacent the first recessed portion, the compression ring comprising an outer shell having a mesh core disposed within the shell.
2. The composite exhaust manifold assembly of claim 1 , further comprising a second carrier disposed between the first carrier and the first manifold segment, wherein a first end of the first carrier abuts a first end of the second carrier, wherein at least a portion of the first carrier and the second carrier define the first internal surface, and wherein one of the first end of the first carrier and the first end of the second carrier comprises the first recessed portion.
3. The composite exhaust manifold assembly of claim 1 , wherein the outer shell comprises a split housing with a first portion coupled to a second portion.
4. The composite exhaust manifold assembly of claim 1 , wherein the first carrier is integrated with the flange or coupled thereto.
5. A composite exhaust manifold assembly comprising:
a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment;
a first carrier coupled to the flange, wherein the first carrier defines at least a portion of a first recess and a portion of a second recess;
a first compression ring disposed adjacent the first recess;
a second compression ring disposed adjacent the second recess, wherein the second compression ring has a concave curvature or concave polygonal cross-section, wherein an interior angle is oriented towards the first compression ring; and
a second manifold segment having a second fluid conduit formed therein, the second manifold disposed adjacent an internal surface of the first carrier, wherein the first and second compression rings provide sealing engagement between the second manifold and the first carrier.
6. The composite exhaust manifold assembly of claim 5 , further comprising a second carrier disposed between the first carrier and the flange, wherein the second manifold segment is disposed adjacent an internal surface of the second carrier.
7. The composite exhaust manifold assembly of claim 6 , wherein the second carrier defines at least a portion of the first recess.
8. The composite exhaust manifold assembly of claim 5 , further comprising a retainer disposed adjacent the second recess, wherein the second compression ring is interposed between the retainer and a portion of the first carrier.
9. The composite exhaust manifold assembly of claim 8 , wherein the retainer has an annular shape and is configured to circumscribe an outer periphery of the second manifold segment.
10. The composite exhaust manifold assembly of claim 5 , wherein the first compression ring comprises an outer shell having a mesh core disposed within the shell.
11. The composite exhaust manifold assembly of claim 10 , wherein the outer shell comprises a split housing with a first portion coupled to a second portion.
12. The composite exhaust manifold assembly of claim 5 , wherein the first compression ring comprises a woven wire mesh having a high temperature filler.
13. The composite exhaust manifold assembly of claim 5 , wherein the first recess has an annular shape and a rectangular cross-section.
14. A composite exhaust manifold assembly comprising:
a first manifold segment having a first fluid conduit formed therein and having a flange disposed at a first end of the first manifold segment;
a first carrier coupled to the flange, the first carrier having a first end;
a first recessed portion formed in the first end of the first carrier;
a spring element disposed adjacent the first recessed portion;
a compression ring disposed adjacent the spring element; and
a second manifold segment having a second fluid conduit formed therein, the second manifold segment disposed adjacent an internal surface of the first carrier, wherein the spring biases the compression ring to provide sealing engagement between the second manifold segment and the first carrier.
15. The composite exhaust manifold assembly of claim 14 , further comprising a second carrier disposed between the first carrier and the flange, wherein the second manifold segment is disposed adjacent an internal surface of the second carrier.
16. The composite exhaust manifold assembly of claim 14 , wherein the compression ring has a polygonal cross-section such as a triangular, trapezoidal, or pentagonal cross-section.
17. The composite exhaust manifold assembly of claim 14 , wherein the compression ring comprises a woven wire mesh comprising a high temperature filler.
18. The composite exhaust manifold assembly of claim 14 , wherein the spring element comprises a conical spring washer in series.
19. The composite exhaust manifold assembly of claim 14 , wherein the second manifold segment further comprises a shoulder spaced from a second end thereof, wherein the shoulder abuts one or more of the spring element and the compression ring.
20. A composite exhaust manifold assembly comprising:
a first carrier defining at least a portion of a first internal surface, the first carrier comprising one or more recesses formed in the first internal surface; and
one or more compression rings disposed respectively in the one or more recesses wherein the one or more compressions rings comprises a mesh ring, comprises a concave curvature or concave polygonal cross-section, or comprises a biasing spring element.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/723,822 US20160348565A1 (en) | 2015-05-28 | 2015-05-28 | Segmented Exhaust Manifold Gas Seals |
DE102016109534.6A DE102016109534A1 (en) | 2015-05-28 | 2016-05-24 | Gas seals for multi-part exhaust manifold |
CN201610364825.0A CN106194490B (en) | 2015-05-28 | 2016-05-27 | Sectional type exhaust manifold gas sealing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/723,822 US20160348565A1 (en) | 2015-05-28 | 2015-05-28 | Segmented Exhaust Manifold Gas Seals |
Publications (1)
Publication Number | Publication Date |
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US20160348565A1 true US20160348565A1 (en) | 2016-12-01 |
Family
ID=57281972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US14/723,822 Abandoned US20160348565A1 (en) | 2015-05-28 | 2015-05-28 | Segmented Exhaust Manifold Gas Seals |
Country Status (3)
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US (1) | US20160348565A1 (en) |
CN (1) | CN106194490B (en) |
DE (1) | DE102016109534A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180128152A1 (en) * | 2016-10-10 | 2018-05-10 | Egc Enterprises, Inc. | Exhaust sealing joint |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107218394A (en) * | 2017-06-09 | 2017-09-29 | 长春鑫利密封制品有限公司 | Sealing device and automobile |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4641861A (en) | 1984-06-01 | 1987-02-10 | O.E.M. Technical Sales, Inc. | Flexible joint for pipes |
KR100427062B1 (en) * | 2000-08-24 | 2004-04-17 | 현대자동차주식회사 | Sealing structure of exhaust manifold |
US7328685B2 (en) * | 2005-06-01 | 2008-02-12 | Dana Corporation | Slip joint exhaust manifolds |
US7837233B2 (en) * | 2005-08-26 | 2010-11-23 | Cummins Inc. | Exhaust system slip joint |
DE102005056244B4 (en) * | 2005-11-25 | 2015-07-30 | Volkswagen Ag | Exhaust system for an internal combustion engine |
US20100072710A1 (en) * | 2008-09-22 | 2010-03-25 | General Electric Company | Gas Turbine Seal |
KR101677298B1 (en) * | 2010-12-21 | 2016-11-18 | 두산인프라코어 주식회사 | Exhaust manifold for blocking off occurrence of condenced water and leak of gas for an engine |
DE102012106334A1 (en) * | 2012-07-13 | 2014-01-16 | Elringklinger Ag | Exhaust guide system for internal combustion engine, has sealing element comprising sealing portion, which makes gastight connection with exhaust guide element, where initial tension is provided in sealing element by elastic deformation |
CN202732073U (en) * | 2012-09-17 | 2013-02-13 | 潍柴动力股份有限公司 | Sealing structure of split-type exhaust manifold |
-
2015
- 2015-05-28 US US14/723,822 patent/US20160348565A1/en not_active Abandoned
-
2016
- 2016-05-24 DE DE102016109534.6A patent/DE102016109534A1/en active Pending
- 2016-05-27 CN CN201610364825.0A patent/CN106194490B/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20180128152A1 (en) * | 2016-10-10 | 2018-05-10 | Egc Enterprises, Inc. | Exhaust sealing joint |
US10662854B2 (en) * | 2016-10-10 | 2020-05-26 | Egc Enterprises, Inc. | Exhaust sealing joint |
Also Published As
Publication number | Publication date |
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DE102016109534A1 (en) | 2016-12-01 |
CN106194490A (en) | 2016-12-07 |
CN106194490B (en) | 2020-03-06 |
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AS | Assignment |
Owner name: CATERPILLAR INC., ILLINOIS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JONES, DOUGLAS;REEL/FRAME:035731/0833 Effective date: 20150527 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |