US20090077956A1 - Flexible Exhaust Pipe Coupling - Google Patents

Flexible Exhaust Pipe Coupling Download PDF

Info

Publication number
US20090077956A1
US20090077956A1 US12/086,143 US8614308A US2009077956A1 US 20090077956 A1 US20090077956 A1 US 20090077956A1 US 8614308 A US8614308 A US 8614308A US 2009077956 A1 US2009077956 A1 US 2009077956A1
Authority
US
United States
Prior art keywords
guide tube
pipe
inlet
downstream pipe
downstream
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
US12/086,143
Other languages
English (en)
Inventor
Dennis Langervik
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.)
Volvo Trucks North America Inc
Original Assignee
Volvo Trucks North America Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Volvo Trucks North America Inc filed Critical Volvo Trucks North America Inc
Assigned to VOLVO TRUCKS NORTH AMERICA, INC. reassignment VOLVO TRUCKS NORTH AMERICA, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LANGERVIK, DENNIS
Publication of US20090077956A1 publication Critical patent/US20090077956A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • 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
    • F01N2470/12—Tubes being corrugated
    • 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
    • F01N2470/30—Tubes with restrictions, i.e. venturi or the like, e.g. for sucking air or measuring mass flow
    • 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives

Definitions

  • the invention relates to exhaust systems for vehicles, in particular heavy trucks. More particularly, the invention relates to a flexible coupling for an exhaust system for a heavy truck that allows liquid to pass through the coupling without leakage.
  • Exhaust systems in truck tractors conduct exhaust gases along a relatively long path from the engine rearward of the cab to a stack or tail pipe.
  • the pipes are subject to vibrations from the flowing gases and vibrations and bending movements imparted by the moving vehicle.
  • the pipe joints are joined with resilient, movable couplings.
  • U.S. Pat. No. 5,145,215 to Udell shows one such resilient coupling.
  • the device includes two sleeve members 16 , 17 that join in an overlapping manner.
  • the end edges of the sleeves are turned outward and inward, respectively, to retain a spacer member 48 between the sleeves.
  • the sleeves are surrounded by a bellows 10 , which is, in turn surrounded by a braided wire fabric 23 .
  • the ends of the assembly are received in end caps.
  • the end caps are mounted to the adjacent pipe ends to provide the coupling.
  • truck exhaust systems may in the future be called on to carry liquid material to treat the combustion products or to clean or regenerate exhaust after-treatment devices, such as diesel particulate filters, oxidizers, or catalyzers.
  • the liquid material may be as a condensate or atomized form, and may include automotive or diesel fuel, urea, ammonia, or some other combustive, oxidizing or catalyzing agent.
  • the present invention provides a flexible pipe coupling system that eliminates components and associated cost and complexity of known devices, while providing a coupling allowing liquid to pass without leakage.
  • a flexible sleeve joins an upstream pipe to a downstream pipe.
  • a guide tube extends from an outlet end of the upstream pipe through the flexible sleeve into an inlet end of the downstream pipe.
  • the guide tube carries flow through the flexible sleeve area and allows the flow to exit into the downstream pipe.
  • An outlet of the guide tube is disposed within the downstream pipe of the coupling, and is spaced from the internal walls of the downstream pipe. This ensures that all flow passes the joint area into the downstream pipe and isolates the guide tube from the downstream pipe to prevent the transmission of vibration.
  • the guide tube may be shaped as a straight cylinder.
  • the guide tube has a frustoconical shape that converges at an outlet end. This second embodiment allows the upstream pipe and the downstream pipe to have the same diameter, the convergence of the guide tube providing the spacing between the guide tube and downstream pipe inlet.
  • an outlet of the guide tube may include a radially outwardly flaring mouth to improve the pressure loss at the outlet of the guide tube.
  • an inlet end of the downstream pipe may be shaped with a rim that converges radially inwardly.
  • the rim of the downstream pipe helps prevent backflow of liquid into the flexible sleeve area.
  • the guide tube is a separate component fastened to the outlet end of the upstream exhaust pipe.
  • the guide tube is a formed extension of the upstream pipe.
  • the invention provides a low cost, reliable device.
  • the flexible sleeve allows the upstream exhaust pipe and downstream exhaust pipe to move relative to one another, but the sleeve does not need to be liquid tight.
  • the internal guide tube carries liquid and exhaust gas flow through the coupling joint without leakage.
  • the invention is particularly applicable to newer exhaust systems which may carry liquids for regenerating exhaust after-treatment devices, such as particulate filters, oxidizers, and catalyzers.
  • FIG. 1 is sectional view of an exhaust pipe coupling in accordance with the invention
  • FIG. 2 is a sectional view of an exhaust pipe coupling according to an alternative embodiment
  • FIG. 3 is a sectional view of an alternative embodiment of a guide tube of the invention.
  • FIG. 4 is a sectional view of an alternative embodiment for an inlet to a downstream exhaust pipe.
  • FIG. 5 is a sectional view of another alternative embodiment for an inlet to a downstream exhaust pipe.
  • FIG. 1 shows a longitudinal sectional view of an exhaust pipe coupling device in accordance with a first embodiment of the invention.
  • the device connects an upstream exhaust pipe 10 with a downstream exhaust pipe 20 .
  • the normal flow direction of exhaust gas is shown by arrow A.
  • truck exhaust systems are or may in the future be called on to carry liquid material to treat the combustion products or to clean or regenerate exhaust after-treatment devices, such as diesel particulate filters, oxidizers, or catalyzers.
  • the liquid material may be as a condensate or atomized form, and may include automotive or diesel fuel, urea, ammonia, or some other combustive, oxidizing or catalyzing agent.
  • the device according to invention assures that liquid material passes the joint areas in the exhaust piping without leakage.
  • a flexible sleeve 30 receives the outlet end 12 of the upstream pipe 10 and the inlet end 22 of the downstream pipe 20 .
  • Clamps 40 , 42 secure the flexible sleeve 30 to the outer surfaces of the upstream pipe 10 and downstream pipe 20 .
  • the flexible sleeve 30 in a preferred embodiment is a metal spiral wound tube that provides resilient bending in a plane perpendicular to the gas flow direction A, and accommodates compression and tension in the flow direction. The spiral forms rings that are interlocked to provide a closed surface.
  • the sleeve is preferably stainless steel.
  • a flexible sleeve as described is available, for, example, from Federal Hose, Inc. of Painesville, Ohio, Riker Products of Toledo, Ohio and Tru-flex Metal Hose Corp. of West Riverside, Ind. Other similarly functional flexible sleeves could be substituted.
  • a guide tube 50 extends from the outlet end 12 of the upstream pipe 10 into the inlet 22 of the downstream pipe 20 .
  • the guide tube 50 is spaced radially from the downstream tube 20 to prevent the transmission of vibration therebetween.
  • the guide tube 50 may be formed a cylinder, which is illustrated and described in connection with FIG. 2 .
  • the downstream tube 20 is formed with a larger diameter to accommodate the end of the guide tube.
  • the upstream tube 10 may be formed with the same diameter as the guide tube 50 .
  • the guide tube 50 has a frustoconical shape that converges in the flow direction A, that is, narrows from an upstream end 52 to a downstream end 54 . This shape allows the guide tube 50 to be fitted to an upstream pipe 10 having the same diameter as the downstream pipe 20 and provide spacing between the outlet 54 of the guide tube 50 and the inlet 22 of the downstream pipe 20 .
  • downstream end 54 of the flow guide 50 is shaped with a radially outward flaring rim 56 that aids flow in exiting from the flow guide.
  • the inlet end 22 of the downstream pipe 20 is shaped with a radially inwardly converging rim 24 to help prevent liquid backflow into the flexible sleeve 30 area.
  • the bend in the rim should be enough to act as a catch to prevent liquid backflow, but not interfere with the free movement of the outlet of the guide tube.
  • a ring 26 may be secured inside the inlet of the downstream pipe as shown in FIG. 4 .
  • the inlet of the downstream pipe may be provided with a trough 28 to collect liquid before it reaches the sleeve area as shown in FIG. 5 .
  • Other means as will occur to those skilled in the art may be used.
  • the guide tube 51 may be formed as a cylinder, in the view shown, being an extended portion of the upstream pipe 11 .
  • the guide tube 51 may also be formed as a separate component attached to the upstream pipe 11 .
  • the upstream pipe 11 and guide tube 51 have a diameter smaller than the diameter of the downstream pipe 20 , which provides the spacing between the outlet 55 of the guide tube and the inlet 22 of the downstream pipe.
  • An adapter 60 is mounted on the upstream pipe 11 to accommodate the difference in diameter with the downstream pipe 20 for mounting the flexible sleeve 30 .
  • the flexible sleeve 30 is secured to the upstream pipe 11 and downstream pipe 20 by clamps 40 , 41 or other suitable devices.
  • the downstream pipe 20 is also formed with the preferred inlet rim 24 converging radially inward.
  • the guide tube 51 shown in FIG. 2 has a straight outlet, but may be formed with the flared outlet rim shown in FIG. 1 .
  • the flow guide 50 is a separate component attached to the upstream pipe 10 , which can be done by any convenient method, including welding.
  • a flow guide 50 ′ may be an extension of an upstream pipe 10 ′, and drawn down in diameter if a frustoconical section is desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Exhaust Gas After Treatment (AREA)
US12/086,143 2005-12-22 2005-12-22 Flexible Exhaust Pipe Coupling Abandoned US20090077956A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/046701 WO2007078274A2 (fr) 2005-12-22 2005-12-22 Raccord flexible pour tuyau d'échappement

Publications (1)

Publication Number Publication Date
US20090077956A1 true US20090077956A1 (en) 2009-03-26

Family

ID=38228640

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/086,143 Abandoned US20090077956A1 (en) 2005-12-22 2005-12-22 Flexible Exhaust Pipe Coupling

Country Status (4)

Country Link
US (1) US20090077956A1 (fr)
EP (1) EP1966467A4 (fr)
CA (1) CA2633310A1 (fr)
WO (1) WO2007078274A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017198175A (ja) * 2016-04-28 2017-11-02 住友建機株式会社 ショベル

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470989A (en) * 1943-12-16 1949-05-24 Chicago Metal Hose Corp Flexible connector
US4659117A (en) * 1982-08-10 1987-04-21 Iwk Regler Und Kompensatoren Gmbh Flexible coupling for pipes in exhaust systems of motor vehicles
US5145215A (en) * 1991-04-26 1992-09-08 Senior Engineering Investments, B.V. Flexible coupler apparatus
US5437479A (en) * 1992-10-06 1995-08-01 Feodor Burgmann Dichtungswerke Gmbh & Co. Flexible connection arrangement for the two pipe portions particularly for motor vehicle exhausts
US5653478A (en) * 1995-08-30 1997-08-05 Caterpillar Inc. Flexible coupling assembly
US5967565A (en) * 1998-01-20 1999-10-19 Sjm Co., Ltd. Exhaust coupler system
US5971439A (en) * 1997-01-17 1999-10-26 Senior Engineering Investments Ag Flexible coupler apparatus
US5988308A (en) * 1996-09-06 1999-11-23 Freightliner Corporation Flexible articulated coupling that minimizes leakage
US6047993A (en) * 1997-02-27 2000-04-11 Daimlerchrysler Ag Arrangement for connection pipe pieces and method of making same
US6086110A (en) * 1997-04-10 2000-07-11 Senior Engineering Investments Ag Vibration decoupling connector for exhaust systems
US6151893A (en) * 1996-02-02 2000-11-28 Calsonic Corporation Flexible tube for automobile exhaust systems
US6419280B2 (en) * 2000-01-13 2002-07-16 Honda Giken Kogyo Kabushiki Kaisha Exhaust pipe joint assembly
US6902204B2 (en) * 2002-11-26 2005-06-07 Microflex, Inc. Exhaust vibration decoupling connector with locked liner tubes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH049515Y2 (fr) * 1988-10-08 1992-03-10
US5957504A (en) * 1997-04-10 1999-09-28 Senior Engineering Investments Ag Exhaust manifold attachment apparatus
US6488313B1 (en) * 1999-07-20 2002-12-03 Tru-Flex Metal Hose Corp. Flexible connector assembly for exhaust system
DE10164036A1 (de) * 2001-12-28 2003-07-17 Emitec Emissionstechnologie Flexibles Leitungselement

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2470989A (en) * 1943-12-16 1949-05-24 Chicago Metal Hose Corp Flexible connector
US4659117A (en) * 1982-08-10 1987-04-21 Iwk Regler Und Kompensatoren Gmbh Flexible coupling for pipes in exhaust systems of motor vehicles
US5145215A (en) * 1991-04-26 1992-09-08 Senior Engineering Investments, B.V. Flexible coupler apparatus
US5437479A (en) * 1992-10-06 1995-08-01 Feodor Burgmann Dichtungswerke Gmbh & Co. Flexible connection arrangement for the two pipe portions particularly for motor vehicle exhausts
US5653478A (en) * 1995-08-30 1997-08-05 Caterpillar Inc. Flexible coupling assembly
US6151893A (en) * 1996-02-02 2000-11-28 Calsonic Corporation Flexible tube for automobile exhaust systems
US5988308A (en) * 1996-09-06 1999-11-23 Freightliner Corporation Flexible articulated coupling that minimizes leakage
US5971439A (en) * 1997-01-17 1999-10-26 Senior Engineering Investments Ag Flexible coupler apparatus
US6047993A (en) * 1997-02-27 2000-04-11 Daimlerchrysler Ag Arrangement for connection pipe pieces and method of making same
US6086110A (en) * 1997-04-10 2000-07-11 Senior Engineering Investments Ag Vibration decoupling connector for exhaust systems
US5967565A (en) * 1998-01-20 1999-10-19 Sjm Co., Ltd. Exhaust coupler system
US6419280B2 (en) * 2000-01-13 2002-07-16 Honda Giken Kogyo Kabushiki Kaisha Exhaust pipe joint assembly
US6902204B2 (en) * 2002-11-26 2005-06-07 Microflex, Inc. Exhaust vibration decoupling connector with locked liner tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017198175A (ja) * 2016-04-28 2017-11-02 住友建機株式会社 ショベル

Also Published As

Publication number Publication date
EP1966467A4 (fr) 2010-03-10
EP1966467A2 (fr) 2008-09-10
WO2007078274A2 (fr) 2007-07-12
WO2007078274A3 (fr) 2009-04-23
CA2633310A1 (fr) 2007-07-12

Similar Documents

Publication Publication Date Title
US7779624B2 (en) Joint for an engine exhaust system component
US7941995B2 (en) Exhaust aftertreatment system with compliantly coupled sections
US8246709B2 (en) Device and method for connecting housing sections of soot particle filters
US8844579B2 (en) Flexible vibration absorbing tube
KR101848802B1 (ko) 배기 조립체용 모듈형 믹서
KR100871481B1 (ko) 엔진 배기가스 정화용 정화장치
EP3301340B1 (fr) Ensemble de joint
EP1422412A2 (fr) Dispositif de recirculation des gaz d'échappement d'un moteur à combustion interne
US6669912B1 (en) Flexible combined vibration decoupling exhaust connector and preliminary catalytic converter construction
US5134852A (en) Clam shell type Y-joint
US20090077956A1 (en) Flexible Exhaust Pipe Coupling
US7582267B1 (en) Space saving serviceable exhaust aftertreatment assembly
JP4048931B2 (ja) エンジンのｅｇｒ装置
US20100013217A1 (en) Tube joint and method of joining tubes in an engine exhaust system
FR2926845A1 (fr) Element de conduite d'echappement flexible, et ensemble de motorisation comportant un tel element, notamment pour un vehicule avec circuit de recirculation des gaz d'echappement
CN110735703B (zh) 具有阀的减小长度的排气系统
JP2006336587A (ja) 自動車排気系用フレキシブルチューブ
US11391195B2 (en) Exhaust system and muffler
MX2008008332A (en) Flexible exhaust pipe coupling
US20090026763A1 (en) Sliding Sealing Connector
CN112814773A (zh) 内燃机搭载车辆的排气管结构及内燃机搭载车辆制造方法
RU2449899C1 (ru) Труба приемная глушителя с нейтрализатором
US11965450B2 (en) Exhaust treatment systems for work vehicles
US20150033734A1 (en) Gas flow distributing flexible coupling
JP4110944B2 (ja) 蛇腹管の溶接構造

Legal Events

Date Code Title Description
AS Assignment

Owner name: VOLVO TRUCKS NORTH AMERICA, INC., CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LANGERVIK, DENNIS;REEL/FRAME:021091/0088

Effective date: 20080605

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION