US20080083216A1 - Double-walled exhaust manifold - Google Patents

Double-walled exhaust manifold Download PDF

Info

Publication number
US20080083216A1
US20080083216A1 US11/575,713 US57571305A US2008083216A1 US 20080083216 A1 US20080083216 A1 US 20080083216A1 US 57571305 A US57571305 A US 57571305A US 2008083216 A1 US2008083216 A1 US 2008083216A1
Authority
US
United States
Prior art keywords
manifold
manifold element
external
internal
tubes
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
US11/575,713
Other languages
English (en)
Inventor
Stephane Claudinon
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.)
Renault SAS
Original Assignee
Renault SAS
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
Priority claimed from FR0410295A external-priority patent/FR2875845A1/fr
Priority claimed from FR0453071A external-priority patent/FR2879652A1/fr
Application filed by Renault SAS filed Critical Renault SAS
Publication of US20080083216A1 publication Critical patent/US20080083216A1/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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/102—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1861—Construction facilitating manufacture, assembly, or disassembly the assembly using parts formed by casting or moulding
    • 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
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/10—Exhaust treating devices having provisions not otherwise provided for for avoiding stress caused by expansions or contractions due to temperature variations

Definitions

  • the invention relates to a double-walled exhaust manifold for a motor vehicle.
  • the invention relates more particularly to a double-walled exhaust manifold for a motor vehicle, of the type provided with at least one internal manifold element and one external manifold element, of the type in which the internal manifold element is provided with at least two coaxial tubes nested slidingly one inside the other, and of the type in which the external manifold element is cast in one piece around the internal manifold element, with which it defines an internal insulating cavity disposed between the internal manifold element and the external manifold element.
  • U.S. Pat. No. 4,182,122 describes and illustrates a manifold of the type described in the foregoing, wherein the internal manifold element is provided with at least one internal tube of “T” shape, whose central branch is connected to an exhaust conduit of the cylinder head and whose symmetric branches, with their axis intersecting the axis of the central branch, are each connected slidingly to at least one other internal tube.
  • the internal manifold element is provided with at least one internal tube of “T” shape, whose central branch is connected to an exhaust conduit of the cylinder head and whose symmetric branches, with their axis intersecting the axis of the central branch, are each connected slidingly to at least one other internal tube.
  • the internal connector element is separated from the external manifold element by a “T” shaped insulator made in two pats and mounted with clearance between the internal manifold element and the external manifold element.
  • the insulator actually ensures that the external manifold element will not be exposed to excessively high temperatures. To the contrary, it concentrates the heat resulting from the rise in temperature of the internal manifold element around that element.
  • the “T” shape of the aforesaid internal tube subjects it to elevated mechanical constraints when it expands as a result of the rise in temperature of the internal manifold element. This expansion, which is not compensated between the central branch and the symmetric branches of the internal “T” tube, may result in rupture thereof.
  • the invention remedies these drawbacks by proposing a manifold in which, on the one hand, the external manifold element is insulated from the internal manifold element and, on the other hand, in which all the internal tubes of the internal manifold element are tubes of substantially long shape mounted slidingly one inside the other in such a way as to absorb the deformations resulting from the rise in temperature of the manifold during use thereof.
  • the invention proposes a manifold of the type described hereinabove, characterized in that the internal manifold element is provided with at least one straight first upstream tube, a first end of which is disposed in the extension of an exhaust conduit of a cylinder head of an associated heat engine, and a second end of which is nested slidingly with an intermediate part of at least one downstream tube whose axis intersects the axis of the said first upstream tube, thus permitting expansion of the said internal manifold element during the rise in temperature of the manifold.
  • the invention also proposes a method for manufacturing an exhaust manifold of the type described hereinabove, characterized in that it includes at least:
  • FIG. 1 is a schematic view in longitudinal section of a manifold according to the invention
  • FIG. 2 is a schematic view in transverse section of the manifold of FIG. 1 ;
  • FIG. 3 is a schematic view in longitudinal section of a manifold according to an alternative embodiment
  • FIG. 4 is a schematic view in transverse section of the manifold of FIG. 3 .
  • the figures illustrate the entirety of a double-walled exhaust manifold 10 for a motor vehicle.
  • manifold 10 is provided with at least one internal manifold element 12 and one external manifold element 14 .
  • External manifold element 14 is provided with a first flange 13 intended to be fixed to the cylinder head (not illustrated) of an associated engine, and with a second flange 15 intended to be fixed to an exhaust pipe (not illustrated) of the vehicle.
  • internal manifold element 12 is provided with at least two coaxial tubes 16 , 13 nested slidingly one inside the other in order to permit a certain expansion of internal manifold element 12 when it is subjected to a temperature rise.
  • external manifold element 14 is cast in known manner in one piece around internal manifold element 12 , with which it defines an internal insulating cavity 20 disposed between internal manifold element 12 and external manifold element 14 .
  • this cavity 20 makes it possible to insulate external manifold element 14 from the heat released by internal manifold element 12 during the rise in temperature of manifold 10 , without interposing any insulation whatsoever between the two manifold elements 12 , 14 and thus risking concentrating the heat on internal manifold element 12 .
  • internal manifold element 12 is provided with at least one straight first upstream tube 22 , a first end 24 of which is disposed in the extension of an exhaust conduit (not illustrated) of a cylinder head of an associated heat engine, and a second end 26 of which is nested slidingly with an intermediate part 28 of at east one downstream tube 16 , 18 , whose axis “B” intersects axis “A” of the said upstream tube 22 , thus permitting expansion of the said internal manifold element 12 during the rise in temperature of manifold 10 .
  • exhaust manifold 10 is provided with at least one elbowed second upstream tube 30 , a first end 32 of which is disposed in the extension of an exhaust conduit (not illustrated) of the cylinder head, and a second end 34 of which, whose axis “B” intersects axis “A” of the first end, is nested slidingly with end 36 of a downstream tube 18 .
  • exhaust manifold 10 is provided with at least two downstream tubes 16 , 18 , one end 38 of one downstream tube 16 being nested slidingly with end 40 of the other downstream tube 18 .
  • manifold 10 is provided with two straight first upstream tubes 22 , an elbowed second upstream tube 30 , and two downstream tubes 16 , 18 , the intermediate parts 28 of which receive the first two upstream tubes 22 .
  • One end 42 of downstream tube 16 communicates with an outlet orifice 44 of manifold 10 .
  • external manifold element 14 is cast in such a way that it confines at least one first end 24 , 32 of an upstream tube 22 , 30 and one end 42 of a downstream tube 16 .
  • This configuration established during casting of external manifold element 14 , allows internal manifold element 12 to be joined simply and effectively to external manifold element 14 . It is then external manifold element 14 that is connected respectively to the cylinder head of the associated engine and to the rest of the exhaust system of the vehicle, Tubes 16 , 18 , 22 , 30 of the internal manifold element are made of steel to facilitate confinement of their ends by external manifold element 14 .
  • external manifold element 14 is provided with a bore 46 , which communicates with internal insulating cavity 20 to permit evacuation of a sand core used to form insulating cavity 20 during casting of the said external manifold element 14 .
  • exhaust manifold 10 can be produced very simply according to a method that includes at least:
  • the invention therefore makes it possible in simple and effective manner, to make a “double-walled” exhaust manifold 10 in which the expansion of tubes 16 , 18 , 22 , 30 of internal element 12 is absorbed by mechanical clearances in all directions, in such a way that it does not affect the strength of the said manifold 10 .
  • the end ( 24 ) of the straight first upstream tube ( 22 ) and the first end ( 32 ) of the elbowed second upstream tube ( 30 ) can extend to the first face ( 13 ) of the external manifold element ( 14 ).
  • the end ( 42 ) of the downstream tube ( 16 ) can extend to the second face ( 15 ) of the external manifold element ( 14 ).
  • This alternative makes it possible to avoid confining at least one first end 24 , 32 of an upstream tube 22 , 30 and one end 42 of a downstream tube 16 , as was described hereinabove with reference to FIGS. 1 and 2 .
  • Ends 24 and 32 which extend to first face 13 of external element 14 , can be in contact with the ends of the exhaust conduits of the cylinder head.
  • end 42 which extends to second face 15 of external element 14 , can be in contact with one end of the exhaust pipe of the engine.
  • This configuration ensures leaktightness relative to the exhaust gas of the engine.
  • external element 14 is not in direct contact with the exhaust gases, there are no risks of corrosion.
  • tubes 22 , 30 and 16 are positioned, relative to the mold used to make external element 14 , in such a way that they protrude beyond this external element 14 once this casting operation has been completed. It is necessary, however, to provide an operation of machining of these tubes, to eliminate the protruding segments. This operation can be performed at the same the operation of machining of manifold 10 .
  • Manifold 10 can be provided with means for preventing axial displacement of the ends 24 , 32 and 42 of upstream tubes 22 , 30 and downstream tube 16 that extend to faces 13 and 15 of external element 14 .
  • Such means are annular grooves or shoulders made on upstream tubes 22 , 30 and downstream tube 16 at the position of the segments in contact with external element 14 , in such a way that, during casting of external element 14 , the molten material defines a shape complementary to those means in order to prevent axial displacement. Consequently, ends 24 , 32 and 42 will be fixed relative to external element 14 , and will always be able to ensure contact with the ends of the exhaust conduits of the cylinder head and of the exhaust pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
US11/575,713 2004-09-29 2005-09-29 Double-walled exhaust manifold Abandoned US20080083216A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR0410295A FR2875845A1 (fr) 2004-09-29 2004-09-29 Collecteur d'echappement a double paroi
FR0410295 2004-09-29
FR0453071 2004-12-20
FR0453071A FR2879652A1 (fr) 2004-12-20 2004-12-20 Collecteur d'echappement a double paroi
PCT/FR2005/050792 WO2006035188A1 (fr) 2004-09-29 2005-09-29 Collecteur d'echappement a double paroi

Publications (1)

Publication Number Publication Date
US20080083216A1 true US20080083216A1 (en) 2008-04-10

Family

ID=35457970

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/575,713 Abandoned US20080083216A1 (en) 2004-09-29 2005-09-29 Double-walled exhaust manifold

Country Status (4)

Country Link
US (1) US20080083216A1 (fr)
EP (1) EP1797294A1 (fr)
JP (1) JP2008514863A (fr)
WO (1) WO2006035188A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090007552A1 (en) * 2007-06-13 2009-01-08 Michael Paul Schmidt Exhaust manifold having improved NVH characteristics
US20130220265A1 (en) * 2012-02-28 2013-08-29 Honda Motor Co., Ltd. Cylinder head
US20130232960A1 (en) * 2012-03-08 2013-09-12 Calsonic Kansei Corporation Dual pipe exhaust manifold
US10610845B2 (en) * 2012-08-09 2020-04-07 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes George Claude Exhaust system for a steam reformer and bearing therefor
EP3708798A1 (fr) 2019-03-13 2020-09-16 GF Casting Solutions AG Collecteur de gaz d'échappement isolé par une fente d'air
US11149621B2 (en) * 2017-11-20 2021-10-19 Weichai Power Co., Ltd Exhaust pipe assembly and engine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729937A (en) * 1971-12-17 1973-05-01 Gen Motors Corp Engine exhaust reactor and method of making
US4182122A (en) * 1978-02-15 1980-01-08 Caterpillar Tractor Co. Insulated exhaust manifold
US5419127A (en) * 1993-11-22 1995-05-30 Soundwich Inc Insulated damped exhaust manifold
US5697155A (en) * 1993-11-18 1997-12-16 Mercedes-Benz Ag Method of manufacturing a branched pipe by internal high-pressure forming
US6427440B1 (en) * 1999-05-21 2002-08-06 Daimlerchrysler Ag Built-up airgap-insulated exhaust manifold of a motor vehicle and method for producing it
US20050072143A1 (en) * 2003-10-07 2005-04-07 Friedrich Boysen Gmbh & Co. Kg Air-gap manifold

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4226715A1 (de) * 1992-08-12 1994-02-17 Eberspaecher J Abgaskrümmer
DE19909934C1 (de) * 1999-03-06 2001-01-11 Daimler Chrysler Ag Luftspaltisolierter Abgaskrümmer zur Abgasführung aus einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3729937A (en) * 1971-12-17 1973-05-01 Gen Motors Corp Engine exhaust reactor and method of making
US4182122A (en) * 1978-02-15 1980-01-08 Caterpillar Tractor Co. Insulated exhaust manifold
US5697155A (en) * 1993-11-18 1997-12-16 Mercedes-Benz Ag Method of manufacturing a branched pipe by internal high-pressure forming
US5419127A (en) * 1993-11-22 1995-05-30 Soundwich Inc Insulated damped exhaust manifold
US6427440B1 (en) * 1999-05-21 2002-08-06 Daimlerchrysler Ag Built-up airgap-insulated exhaust manifold of a motor vehicle and method for producing it
US20050072143A1 (en) * 2003-10-07 2005-04-07 Friedrich Boysen Gmbh & Co. Kg Air-gap manifold

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090007552A1 (en) * 2007-06-13 2009-01-08 Michael Paul Schmidt Exhaust manifold having improved NVH characteristics
US20130220265A1 (en) * 2012-02-28 2013-08-29 Honda Motor Co., Ltd. Cylinder head
US8910608B2 (en) * 2012-02-28 2014-12-16 Honda Motor Co., Ltd. Cylinder head
US20130232960A1 (en) * 2012-03-08 2013-09-12 Calsonic Kansei Corporation Dual pipe exhaust manifold
CN103306795A (zh) * 2012-03-08 2013-09-18 康奈可关精株式会社 双管式排气歧管
US10610845B2 (en) * 2012-08-09 2020-04-07 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes George Claude Exhaust system for a steam reformer and bearing therefor
US11149621B2 (en) * 2017-11-20 2021-10-19 Weichai Power Co., Ltd Exhaust pipe assembly and engine
EP3708798A1 (fr) 2019-03-13 2020-09-16 GF Casting Solutions AG Collecteur de gaz d'échappement isolé par une fente d'air

Also Published As

Publication number Publication date
JP2008514863A (ja) 2008-05-08
WO2006035188A1 (fr) 2006-04-06
EP1797294A1 (fr) 2007-06-20

Similar Documents

Publication Publication Date Title
US20080083216A1 (en) Double-walled exhaust manifold
JP6153589B2 (ja) 排気ターボチャージャーのタービンケーシング
EP2340364B1 (fr) Isolateur d'écoulement d'échappement pour dispositif de système d'échappement
US4182122A (en) Insulated exhaust manifold
JP5305340B2 (ja) 排気集合器および関連する製造方法
JP2005147139A (ja) 内燃機関のターボ過給機のためのハウジング装置
JPH0333898B2 (fr)
JP2008522086A (ja) 内燃機関用のピストン
US9416719B2 (en) Exhaust manifold with insulation sleeve
CN104838127A (zh) 壳体及用于制造壳体的方法
US9500120B2 (en) Integration ring
US4289169A (en) Heat-expandable multi-passage pipe having parts for intended breakage
US5150572A (en) Insulated exhaust port liner
CN111655988A (zh) 涡轮机壳体的制造方法
US20070180820A1 (en) Dual wall exhaust manifold and method of making same
CN105556087B (zh) 集成有催化剂壳体的排气歧管及其制造方法
JPH0574684B2 (fr)
JP7415008B2 (ja) 回転電機冷却フレーム及び回転電機冷却フレームの製造方法
KR101889381B1 (ko) 배기가스 터보차저
CA2548760A1 (fr) Composant cintre a deux parois, par exemple tuyau pour gaz d'echappement isole par lame d'air, et son procede de production
JP2004116518A (ja) 高温ダクト装置を支持する方法及び装置
JP7173166B2 (ja) シリンダヘッド
CN111691961A (zh) 气隙隔绝的排气弯管
US6571762B2 (en) Cylinder head of an internal combustion engine
JP4595843B2 (ja) 内燃機関の排気ポートライナおよびシリンダヘッドの製造方法

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

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