US20200271034A1 - Exhaust gas converter body structure - Google Patents

Exhaust gas converter body structure Download PDF

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Publication number
US20200271034A1
US20200271034A1 US16/802,220 US202016802220A US2020271034A1 US 20200271034 A1 US20200271034 A1 US 20200271034A1 US 202016802220 A US202016802220 A US 202016802220A US 2020271034 A1 US2020271034 A1 US 2020271034A1
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US
United States
Prior art keywords
joint
pipe
inlet
outlet
main body
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
Application number
US16/802,220
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English (en)
Inventor
Holger Brenner
Oleksander Vyelyayev
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Exhaust Technology GmbH and Co KG
Original Assignee
Eberspaecher Exhaust Technology GmbH and Co KG
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Filing date
Publication date
Application filed by Eberspaecher Exhaust Technology GmbH and Co KG filed Critical Eberspaecher Exhaust Technology GmbH and Co KG
Assigned to Eberspächer Exhaust Technology GmbH reassignment Eberspächer Exhaust Technology GmbH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRENNER, Holger, VYELYAYEV, Oleksander
Publication of US20200271034A1 publication Critical patent/US20200271034A1/en
Assigned to PUREM GMBH, FORMERLY, EBERSPÄCHER EXHAUST TECHNOLOGY GMBH reassignment PUREM GMBH, FORMERLY, EBERSPÄCHER EXHAUST TECHNOLOGY GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Eberspächer Exhaust Technology GmbH & Co. KG
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • 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
    • 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
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • 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
    • F01N13/1872—Construction facilitating manufacture, assembly, or disassembly the assembly using stamp-formed parts or otherwise deformed sheet-metal
    • 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
    • F01N2450/20—Methods or apparatus for fitting, inserting or repairing different elements by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/10—Tubes having non-circular cross section

Definitions

  • exhaust gas converter body structure for an exhaust gas converter
  • Exhaust gas converters are used to convert harmful components present in the exhaust gas of vehicles powered by internal combustion engines into less harmful or harmless components.
  • Typical exhaust gas converters are exhaust-gas catalytic converters such as a three-way catalytic converter that converts carbon monoxide (CO), nitrogen oxide (NOx) and unburned hydrocarbons (HC) to carbon dioxide (CO 2 ), nitrogen (N 2 ) and water (H 2 O), a NOx adsorber, a DeNOx catalytic converter or a SCR (Selective Catalytic Reaction) catalytic converter.
  • the term exhaust-gas converter also includes particulate filters.
  • An exhaust-gas converter is usually a substrate that has exhaust gas ducts extending through it and is disposed in a body structure.
  • the body structure usually has a main body in which the substrate is disposed.
  • a cushion mat is provided between the substrate and the main body.
  • the cushion mat surrounds the substrate at least in sections, thereby filling a gap present between the main body and the substrate. In this way, the cushion mat determines the position of the substrate inside the main body.
  • the body structure usually comprises an exhaust gas inlet structure, and an exhaust gas outlet structure with the main body arranged in-between.
  • the geometries of the inlet structure and the outlet structure are usually chosen such that an exhaust gas flow is distributed across the internal sectional area of the main body as uniformly as possible so that the exhaust gas flows through the substrate uniformly.
  • the inlet structure and the outlet structure often have a fitting for an exhaust pipe at their ends facing away from the main body.
  • the inlet structure and/or the outlet structure are usually not coupled to the main body before the substrate has been placed inside.
  • the inlet structure and/or the outlet structure may be formed integrally with the main body, for instance formed from the main body by shaping sections of the main body.
  • the process of placing the substrate into the body structure is also referred to as “canning” Canning aims to achieve a reliable positioning of the substrate inside the body structure thereby avoiding any damage to the substrate.
  • Embodiments of an exhaust gas converter body structure comprise a main body, an inlet structure and an outlet structure.
  • the main body is configured to receive an exhaust gas converter and arranged between the inlet structure and the outlet structure.
  • the inlet structure and the main body engage at a first joint.
  • “engage” means that the inlet structure and the main body abut on each other and/or are slotted together at the first joint.
  • the inlet structure and the main body have matching, namely complementary, coupling geometries at the first joint.
  • “matching coupling geometries” means that the coupling geometries allow the inlet structure and the main body to butt against each other more or less seamlessly.
  • the outlet structure and the main body engage, to which end the outlet structure and the main body have matching coupling geometries at the second joint.
  • “engage” means in this context that the outlet structure and the main body abut on each other and/or are slotted together at the second joint, while “matching coupling geometries” means that the coupling geometries allow the outlet structure and the main body to butt against each other more or less seamlessly.
  • the coupling geometries of the inlet structure and the main body at the first joint are in themselves either asymmetric or reflection-symmetric with respect to exactly one single plane of symmetry.
  • the coupling geometries of the outlet structure and the main body at the second joint are in themselves either asymmetric or reflection-symmetric with respect to exactly one single plane of symmetry.
  • a coupling geometry is “asymmetric” if it has no symmetry from a geometric point of view.
  • the feature “asymmetric or reflection-symmetric with respect to exactly one single plane of symmetry” is sufficiently met, when the coupling geometries are chosen such that a more or less seamless coupling of the inlet structure with the main body or the outlet structure with the main body is only possible at a single angular position and/or the inlet structure can more or less seamlessly only be fitted to a selected end of the main body and the outlet structure can more or less seamlessly only be fitted to the other end of the main body.
  • “more or less seamlessly” means that a residual gap can permanently be sealed gas-tight by conventional means (e.g., welding, soldering, crimping or gluing).
  • a defined angular position ensures, for example, a reproducible distribution and streaming of the exhaust gas flow across the internal cross-section of the main body. This is important insofar as the inlet structure and/or outlet structure often have no rotational symmetry.
  • a defined angular position ensures that the positioning of an exhaust gas converter body structure mounted at the underbody of a vehicle prevents any accumulation of corrosive condensate or reducing agent in areas particularly prone to corrosion (such as weld seams oriented in the longitudinal direction of the main body). This also allows the stability of the exhaust gas converter body structure, as well as its behavior in the event of an accident to be optimized and made reproducible.
  • a defined angular position also permits a fixed angular relationship between the inlet structure and/or outlet structure and an exhaust gas converter received in the main body and/or a cushion mat surrounding the exhaust gas converter.
  • an overlap between a butt joint of the cushion mat and a weld seam oriented in the longitudinal direction of the main body may be prevented.
  • a sophisticated capturing of the weld seam oriented in the longitudinal direction of the main body with a camera system, as commonly used, may then be omitted.
  • the inlet structure being only mountable to a selected end of the main body, and the outlet structure being only mountable to the other end of the main body further guarantees that the exhaust gas supplied through the inlet structure passes the exhaust gas converter received in the main body in the correct flow direction.
  • the coupling geometry of the inlet structure at the first joint and/or the coupling geometry of the outlet structure at the second joint comprises at least one protrusion extending towards the main body, or a recess extending away from the main body and/or at least one groove extending away from the main body and/or at least one protrusion extending towards the outside of the exhaust gas converter body structure, or a recess extending towards the inside of the exhaust gas converter body structure and/or at least one opening.
  • the coupling geometry of the main body at the first joint comprises at least one protrusion extending towards the inlet structure, or a recess extending away from the inlet structure and/or at least one groove extending away from the inlet structure.
  • the coupling geometry of the main body at the second joint comprises at least one protrusion extending towards the outlet structure, or a recess extending away from the outlet structure and/or at least one groove extending away from the outlet structure.
  • the coupling geometry of the main body at the first and/or second joint comprises at least one protrusion extending towards the outside of the exhaust gas converter body structure and/or a recess extending towards the inside of the exhaust gas converter body structure and/or at least one opening.
  • the desired asymmetry of the coupling geometries can be provided in a cost-effective manner.
  • This also allows for the provision of different coupling geometries in such a number that only certain inlet structures can be coupled with certain main bodies and/or only certain outlet structures can be coupled with certain main bodies and/or can be coupled observing given angle relations.
  • the coupling geometry of the inlet structure at the first joint comprises at least one protrusion extending towards the outside of the exhaust gas converter body structure, while the coupling geometry of the main body at the first joint comprises at least one groove extending away from the inlet structure.
  • the coupling geometry of the outlet structure at the second joint comprises at least one protrusion extending towards the outside of the exhaust gas converter body structure, while the coupling geometry of the main body at the second joint comprises at least one groove extending away from the outlet structure.
  • the inlet structure and/or the outlet structure and the main body may match each other in a way that allows the inlet structure, respectively the outlet structure, to be slid into the main body at the region of the first, respectively second joint, with the protrusion of the inlet structure, respectively outlet structure, being disposed inside the groove of the main body, whereby, failing this, the main body may neither be slid into the inlet structure nor the outlet structure.
  • the coupling geometry of the inlet structure at the first joint has at least one groove extending away from the main body and the coupling geometry of the main body at the first joint has at least one protrusion extending towards the outside of the exhaust gas converter body structure.
  • the coupling geometry of the outlet structure at the second joint has at least one groove extending away from the main body and the coupling geometry of the main body at the second joint has at least one protrusion extending towards the outside of the exhaust gas converter body structure.
  • the inlet structure and/or the outlet structure and main body may match each other in way that allows the main body to be slid into the inlet structure, respectively outlet structure, at the region of the first, respectively second joint, with the protrusion of the main body being disposed inside the groove of the inlet structure, respectively outlet structure, whereby failing this, the main body may neither be slid into the inlet structure nor the outlet structure.
  • the groove may, for instance, also be a long hole that is open at one end and penetrates a wall of the inlet structure, the outlet structure or the main body completely.
  • the main body is, except for its coupling geometries, reflection-symmetric or rotation-symmetric.
  • the sectional area of the main body is at a distance from its coupling geometries point-symmetric or axis-symmetric or circular or oval.
  • the inlet structure and/or outlet structure have also outside the coupling geometry no rotational symmetry and/or the inlet structure and/or outlet structure have an asymmetric sectional area at a distance from their coupling geometry.
  • a coupling with the main body observing given angle relations has particular benefits.
  • the inlet structure and/or the outlet structure are, outside of the coupling geometry, symmetric, and particular rotation-symmetric.
  • the exhaust gas converter body structure further comprises a first and/or second exhaust pipe.
  • the first exhaust pipe engages with the inlet structure at a third joint, to which end the inlet structure and the first exhaust pipe have matching coupling geometries at the third joint.
  • the second exhaust pipe engages with the outlet structure at a fourth joint, to which end the outlet structure and the second exhaust pipe have matching coupling geometries at the fourth joint.
  • the coupling geometries of the inlet structure and the first exhaust pipe at the third joint are each either asymmetric or reflection-symmetric with respect to exactly one single axis of symmetry.
  • the coupling geometries of the outlet structure and the second exhaust pipe at the fourth joint are each either asymmetric or reflection-symmetric with respect to exactly one single axis of symmetry.
  • the first and/or second exhaust pipe are, with the exception of the coupling geometries, reflection-symmetric or rotation-symmetric or the first and/or second exhaust pipe have a circular or oval sectional area.
  • the inlet structure and the main body and/or the outlet structure and the main body and/or the inlet structure and the first exhaust pipe and/or the outlet structure and the second exhaust pipe mate in a sliding fit.
  • the main body, the inlet structure, the outlet structure, the first exhaust pipe, and the second exhaust pipe are components fabricated separately.
  • the main body is made of metal, heat-resistant plastic or ceramic.
  • the main body is configured as a tube. If the tube is formed from a shaped material strip, the tube usually has a seam oriented in the longitudinal direction of the tube. The seam can be welded, soldered, crimped or glued. The pipe may also be seamless.
  • the main body receives an exhaust gas converter in form of a substrate.
  • the substrate may, for instance, be a metal carrier or a ceramic carrier, with exhaust gas ducts extending through it, particularly, in a honeycomb structure.
  • the substrate may, for instance, be a monolithic substrate.
  • the substrate may, for instance, have two axial ends facing each other in a gas flow direction along which exhaust gas to be cleaned runs through the substrate.
  • the exhaust gas converter received in the main body further comprises a cushion mat arranged between the substrate and the main body.
  • the cushion mat may, for instance, be made of wire mesh or another thermally resistant and elastic material.
  • the cushion mat may further provide a thermal insulation between the substrate and the main body.
  • the inlet structure and/or outlet structure are made from a metal sheet with or without a seam, cast metal, heat-resistant plastic or ceramic.
  • the main body and/or the inlet structure and/or the outlet structure are provided with an anticorrosive or are entirely made from a corrosion-resistant material such as stainless steel.
  • FIG. 1A is a schematic view showing an exhaust gas converter body structure according to a first embodiment in one of different conditions, with walls illustrated partly transparent;
  • FIG. 1B is a schematic view showing an exhaust gas converter body structure according to the first embodiment in another of different conditions, with walls illustrated partly transparent;
  • FIG. 1C presents schematic sectional views through FIG. 1B along the section lines A-A and B-B;
  • FIG. 2A is a schematic view showing an exhaust gas converter body structure according to a second embodiment in one of different conditions, with walls illustrated partly transparent;
  • FIG. 2B is a schematic view showing an exhaust gas converter body structure according to a second embodiment in another of different conditions, with walls illustrated partly transparent;
  • FIG. 3 is a schematic view showing an exhaust gas converter body structure according to a third embodiment, with walls illustrated partly transparent;
  • FIG. 4 is a schematic view showing a detail of an exhaust gas converter body structure according to a fourth embodiment.
  • FIGS. 1A and 1B illustrate a first embodiment of an exhaust gas converter body structure 1 .
  • FIG. 1A illustrates a not yet completely assembled condition and
  • FIG. 1B illustrates an assembled condition.
  • the exhaust gas converter body structure 1 has a funnel-shaped inlet structure 3 , a funnel-shaped outlet structure 4 and a main body 2 located between the inlet structure 3 and the outlet structure 4 .
  • the main body 2 , the inlet structure 3 and the outlet structure 4 are each made of stainless steel sheet metal with a wall thickness of 0.5 mm.
  • the main body 2 has a circular cross-section, a diameter of 300 mm and a length of 450 mm.
  • a cylindrical substrate 50 is received in the inside of the main body 2 .
  • a cushion mat 55 made of high-temperature wool substantially fills the residual gap between the substrate 50 and the inner wall of the main body 2 .
  • a largest inner diameter of the inlet structure 3 and the outlet structure 4 is slightly larger than the outer diameter of the main body 2 . This allows the main body 2 to be received by the inlet structure 3 and the outlet structure 4 in sections at first and second joint regions V 1 , V 2 . Hence, the coupling geometries of the inlet structure 3 , the outlet structure 4 and the main body 2 match each other.
  • the main body 2 has one bolt-shaped protrusion 23 protruding radially outwards.
  • the coupling geometry of the main body 2 in these regions is therefore not rotation-symmetric, but rather reflection-symmetric with respect to exactly one plane of symmetry intersecting the main body 2 and the protrusions 23 centrally.
  • the outer walls of the inlet structure 3 and the outlet structure 4 have, at each of the first and second joint regions V 1 , V 2 , grooves 32 , 42 axially facing away from the main body 2 and being open towards the main body 2 .
  • the width and length of the grooves 32 , 42 are adapted to the size of the protrusions 23 such that each groove 32 , 42 can receive one protrusion 23 .
  • FIGS. 1A and 1B shows that the inlet structure 3 , the outlet structure 4 and the main body 2 have to be rotated such that they are oriented relative to each other in an angular position given by the positions of the grooves 32 , 42 and the positions of the protrusions 23 .
  • main body 2 and the inlet structure 3 each have holes 25 , 35 in the first joint region V 1 that must align when the main body 2 and inlet structure 3 a have been assembled correctly.
  • main body 2 and the outlet structure 4 each have holes 25 , 45 in the second joint region V 2 that align when the main body 2 and outlet structure 4 have been assembled correctly. Said holes may be used for applying bolts or rivets, for example, in order to fix the main body to the inlet structure respectively outlet structure.
  • the inlet structure 3 and the outlet structure 4 are each configured for being coupled to the first and second exhaust pipes 6 , 7 at third and fourth joints V 3 , V 4 .
  • the inlet structure 3 and the outlet structure 4 and the first and second exhaust pipes 6 , 7 at the third and fourth joints V 3 , V 4 are thereby sized in pairs such that the first exhaust pipe 6 can surround a section of the inlet structure 3 and the second exhaust pipe 7 can surround a section of the outlet structure 4 .
  • the first and second exhaust pipes 6 , 7 can be pushed onto the inlet structure 3 and the outlet structure 4 . Consequently, the coupling geometries of the inlet structure 3 , the outlet structure 4 and the first and second exhaust pipes 6 , 7 match each other in pairs.
  • the inlet structure 3 and the first exhaust pipe 6 on the one hand, and the outlet structure 4 and the second exhaust pipe 7 on the other hand have different sectional areas at the third and fourth joints V 3 , V 4 with both having no point-symmetry, but rather an axial-symmetry with respect to exactly one symmetry axis.
  • the first exhaust pipe 6 may solely be coupled with the inlet structure 3 and in only one orientation
  • the second exhaust pipe 7 may solely be coupled with the outlet structure 4 and in only one orientation.
  • the first and second exhaust pipes 6 , 7 have a circular and thus point-symmetric sectional area.
  • the coupling between the first and second exhaust pipes 6 , 7 and the inlet structure 3 or outlet structure 4 may also have openings or protrusions and recesses extending inwardly or outwardly with respect the exhaust gas converter body structure 1 , as well as grooves etc., as described above for the example for a coupling of the inlet structure 3 , respectively outlet structure 4 with the main body 2 .
  • the coupling geometries in the joint region are selected to enable a substantially seamless coupling of the components at only one single angular position.
  • sectional areas of the inlet structure 3 , respective outlet structure 4 and the main body 2 at first and second joint regions could be chosen to be asymmetric such that a seamless coupling of the components may be achieved at only one single angular position even when protrusions and recesses as well as grooves are omitted.
  • FIG. 2A shows a not yet completely assembled condition
  • FIG. 2B shows an assembled condition
  • the main body 2 ′ has no protrusions in each of the first and second joint regions V 1 , V 2 , but a pair of grooves 22 oriented in the axial direction of the main body 2 ′ and open towards the inlet and outlet structures 3 ′, 4 ′ respectively.
  • the grooves 22 in the first joint region V 1 are hereby spaced apart in the circumferential direction of the main body 2 ′ by a first distance Al that is smaller than a second distance A 2 , by which the grooves 22 in the second joint region V 2 are spaced apart in the circumferential direction of the main body 2 ′.
  • the inlet structure 3 ′ and the outlet structure 4 ′ accordingly have bolt-shaped protrusions 34 , 44 in first and second joint regions V 1 , V 2 , which protrude into the inside of the exhaust gas converter body structure P.
  • the distance between the bolt-shaped protrusions 34 at the inlet structure 3 ′ hereby corresponds to the first distance Al of the grooves 22 in the main body 2 ′ at the first joint region V 1
  • the distance between the bolt-shaped protrusions 44 at the outlet structure 4 ′ corresponds to the second distance A 2 of the grooves 22 in the main body 2 ′ at the second joint region V 2 .
  • the coupling geometries of the inlet structure 3 ′, the outlet structure 4 ′ and the main body 2 ′ at the first and second joint regions V 1 , V 2 match each other in pairs with none being rotation-symmetric. Therefore also here, a mounting of the inlet structure 3 ′ to the main body 2 ′ as well as of the outlet structure 4 ′ to the main body 2 ′ is only possible with an angular position defined by the position of the grooves 22 and protrusions 34 , 44 .
  • the different distances A 1 , A 2 between the grooves 22 and the protrusions 34 , 44 ensure that the inlet structure 3 ′ and the outlet structure 4 ′ can only be mounted at one selected end of the main body 2 ′.
  • the main body at the first and second joint regions are in the first and second embodiment surrounded by the inlet structure and the outlet structure, it is alternatively also possible to configure these components such that both, the inlet structure and the outlet structure or only one of these components is surrounded by the main body in the first and second joint regions. Accordingly, the number, arrangement, and orientation of the bolt-shaped protrusions and grooves can be varied as desired.
  • the substrate 51 of an exhaust gas converter is not only received in the main body 2 ′, but also in the inlet structure 3 ′ and the outlet structure 4 ′, whereby cushion mats 55 surround the substrate in its circumferential direction.
  • the third embodiment does not provide for the inlet structure 3 ′′, the outlet structure 4 ′′ and the main body 2 ′′ to be slotted together. Instead, the end faces of these components abut against each other when being assembled.
  • the coupling geometries in the first and second joint regions V 1 , V 2 are selected to enable a substantially seamless assembly only when the components have a given angular position relative to each other.
  • the inlet structure 3 ′′ has for this purpose at the first joint region V 1 a protrusion 31 oriented towards the main body 2 ′′, while the main body 2 ′′ has at the first joint region V 1 a corresponding recess 22 directed away from the inlet structure 3 ′′.
  • the main body 2 ′′ has a protrusion 21 oriented towards the outlet structure 4 ′′, while the outlet structure 4 ′′ has a corresponding recess 42 directed away from main body 2 ′′.
  • the pairs of the protrusions 21 , 31 and the recesses 22 , 42 are hereby configured differently. Hence it is guaranteed that the inlet structure 3 ′′ and the outlet structure 4 ′′ can each only be mounted to one selected end of the main body 2 ′′.
  • FIG. 4 only intends to refer to the coupling of the first or the second exhaust pipe to the inlet structure, respectively the outlet structure. For this reason, only the first exhaust pipe 6 and the inlet structure 3 * are shown as an example instead of the complete exhaust gas converter body structure.
  • the first exhaust pipe 6 and the inlet-structure 3 * each have a circular sectional area at the third joint region V 3 .
  • the first exhaust pipe 6 and the inlet structure 3 * cannot be slotted together; rather their front faces abut against each other when being assembled. Similar to the above third embodiment, these front faces are provided with protrusions 36 , 61 and recesses 37 , 62 , resulting in the coupling geometries not being symmetric.
  • substantially symmetric inlet structures and outlet structures have been shown, the present invention is not limited to these structures. Furthermore, an illustration of bond joints, solder joints or welded joints or crimp joints for sealing junctions that may permanently and gas-tight seal a residual gap between the components of the exhaust gas converter body structure has been omitted in the above illustrations.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
US16/802,220 2019-02-27 2020-02-26 Exhaust gas converter body structure Abandoned US20200271034A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019104940.7 2019-02-27
DE102019104940.7A DE102019104940A1 (de) 2019-02-27 2019-02-27 Abgaskonverter-Gehäusestruktur

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US20200271034A1 true US20200271034A1 (en) 2020-08-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US16/802,220 Abandoned US20200271034A1 (en) 2019-02-27 2020-02-26 Exhaust gas converter body structure

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Country Link
US (1) US20200271034A1 (fr)
EP (1) EP3702592B1 (fr)
JP (1) JP2020139501A (fr)
DE (1) DE102019104940A1 (fr)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1903852A (en) * 1929-10-05 1933-04-18 Pete D Renfro Pipe joint
FR959453A (fr) * 1947-03-12 1950-03-30
JPS51122211U (fr) * 1975-03-31 1976-10-04
US4475623A (en) * 1982-09-20 1984-10-09 Apx Group, Inc. Universal muffler assembly
JPS6158793U (fr) * 1984-09-25 1986-04-19
DE3831616A1 (de) * 1988-09-17 1990-03-22 Sueddeutsche Kuehler Behr Verfahren zur herstellung von traegerkoerpern fuer katalytische reaktoren zur abgasreinigung
DE3929205A1 (de) * 1989-09-02 1991-03-21 Leistritz Ag Abgasvorrichtung, insbes. abgasreinigungsvorrichtung
CA2032830C (fr) * 1990-12-20 1994-07-26 Robert Graham Straghan Accouplement
US6557908B2 (en) * 2001-07-25 2003-05-06 Arvin Technologies, Inc. Exhaust system clamp assembly and associated method
US7238327B2 (en) * 2002-12-10 2007-07-03 Automotive Components Holdings, Llc Method of attaching internal heat shield in automotive catalytic converters
US8327539B2 (en) * 2006-01-11 2012-12-11 Cummins Filtration Ip, Inc System and method for facilitating proper assembly of an exhaust system
US8904766B2 (en) * 2008-09-08 2014-12-09 Hitachi Construction Machinery Co, Ltd. Exhaust gas treatment device
DE102008051870A1 (de) * 2008-10-16 2010-04-22 Albonair Gmbh Filterelement
JP5890661B2 (ja) * 2011-11-16 2016-03-22 日野自動車株式会社 排気浄化装置
EP3085913B1 (fr) * 2015-04-22 2017-10-11 Faurecia Systèmes d'Echappement Dispositif de purification des gaz d'échappement, ligne d'échappement comprenant un tel dispositif
JP6756627B2 (ja) * 2017-01-17 2020-09-16 フタバ産業株式会社 フランジの締結構造

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EP3702592B1 (fr) 2021-10-27
DE102019104940A1 (de) 2020-08-27
JP2020139501A (ja) 2020-09-03
EP3702592A1 (fr) 2020-09-02

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