EP0914548B1 - Abgaskrümmer für verbrennungsmotoren und verfahren zu seiner herstellung - Google Patents

Abgaskrümmer für verbrennungsmotoren und verfahren zu seiner herstellung Download PDF

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Publication number
EP0914548B1
EP0914548B1 EP98932045A EP98932045A EP0914548B1 EP 0914548 B1 EP0914548 B1 EP 0914548B1 EP 98932045 A EP98932045 A EP 98932045A EP 98932045 A EP98932045 A EP 98932045A EP 0914548 B1 EP0914548 B1 EP 0914548B1
Authority
EP
European Patent Office
Prior art keywords
catalytic converter
manifold
exhaust manifold
catalyst
core
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.)
Expired - Lifetime
Application number
EP98932045A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0914548A1 (de
Inventor
Josef Regler
Wilfried Roos
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.)
Vitesco Technologies Lohmar Verwaltungs GmbH
Original Assignee
Emitec Gesellschaft fuer Emissionstechnologie mbH
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 Emitec Gesellschaft fuer Emissionstechnologie mbH filed Critical Emitec Gesellschaft fuer Emissionstechnologie mbH
Publication of EP0914548A1 publication Critical patent/EP0914548A1/de
Application granted granted Critical
Publication of EP0914548B1 publication Critical patent/EP0914548B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • 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
    • 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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2853—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing
    • F01N3/2857—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration using mats or gaskets between catalyst body and housing the mats or gaskets being at least partially made of intumescent material, e.g. unexpanded vermiculite

Definitions

  • the invention relates to an exhaust manifold for internal combustion engines, consisting of at least one manifold pipe with its End flanges arranged and with one in a straight, extended section of the manifold pipe arranged Catalyst.
  • the invention also relates to a casting core and a method of manufacturing the exhaust manifold.
  • the exhaust gas from gasoline or diesel engines contains substances such as HC, CO, No x and other environmentally harmful components.
  • the emission of these pollutants must be kept as low as possible. Particularly high emissions are released into the atmosphere during the start-up and warm-up phases, since the combustion in the engine cylinders is still incomplete during the start-up and cold-running phases. In this cold-running phase, the substances HC, CO and other particles are still contained in the exhaust gases in high concentrations.
  • catalysts are almost always arranged in the exhaust pipe connected to the engine on the exhaust gas, the task of which is to convert the pollutants into neutral components.
  • EP-A-761 939 discloses an exhaust manifold catalyst arrangement where the manifold and parts of the adjacent catalyst housing are cast in one piece.
  • the catalyst substrate With catalytic effective ingredients used.
  • Via a separate, end part closing the catalytic converter housing with connecting flange is the manifold-catalytic converter assembly with a further exhaust pipe can be connected.
  • the invention is based, while maintaining the task an arrangement of catalysts as close as possible to the cylinder head an exhaust manifold and a suitable manufacturing process to create that can be produced with reasonable effort and the outside except the connection flanges for the cylinder head and the advanced exhaust pipe from projecting, space-consuming Fasteners is free.
  • exhaust manifold or "manifold pipe” is the part of entire exhaust system flanged to the engine to understand the connection between the engine or cylinder head and the Exhaust pipe leading exhaust pipe forms, the manifold depending on the number of cylinders corresponding branch line pieces having.
  • a flange and screw connection of the otherwise usually arranged in a separate housing catalyst on the exhaust manifold is omitted because the catalyst according to the invention in the exhaust manifold is cast in and with this an integral Building unit forms, i.e., because all and ultimately additional assembly work and space-requiring flange connections is also a compact, which is usually eliminated in modern vehicles, confined spaces in the engine compartment appropriate accommodation of the containing the catalyst Exhaust manifold allows only the connection to the cylinder head of the engine in question.
  • the catalyst suffers from its catalytically active Coating, as has been shown and as mentioned, by the heat entered by molten cast iron no damage, and also an undesirable loss of efficiency of the cat could not be determined.
  • By rapidly cooling the melt given the small wall thickness, neither washcoat nor Catalytic noble metal entry on the catalyst is negatively affected.
  • After machining the manifold flanges is the Exhaust manifold with cast-in integrated catalytic converter ready for installation. It can easily be wound metal catalysts or catalysts in the form of ceramic monoliths be cast around.
  • Another advantage of the invention is the "self-adaptation" the liquid melt at the usually tolerances having catalyst.
  • the circumference of the cast Catalyst result thanks to the cast integration the same radial stresses everywhere, regardless of whether there are any geometrical deviations such as out-of-roundness, taper or other shape defects available.
  • the exhaust manifold for internal combustion engines as an exemplary embodiment is still shown at least one manifold pipe 1 arranged at its ends Connection flanges 2 and with one in a straight, expanded Section 3 of the manifold pipe 1 arranged catalyst 4.
  • Fig. 1, 2 is for such an exhaust manifold now essential that the catalyst 4 as a "lost core" in straight section 3 of the manifold pipe cast in one piece 1 is arranged, i.e. the entire exhaust manifold with its in 1, for example, only shows an outer shape including the catalyst integral unit that Ready for installation with their top four branch line connections 2 on the cylinder head ZK of an otherwise not shown four-cylinder engine flanged in a conventional manner and to the lower, leading to the muffler (also not shown) Exhaust pipe AL is connected.
  • Fig. 6 C is the "Total core” according to the invention in its preferred embodiment also shown, i.e. the two connections or Manifold cores 8,8 'are in their attachment areas to Catalyst 4 provided with circumferential beads 9 that the joints between the manifold cores and the end faces 5 and thus the Cover foils 7.
  • foils 7, which consist, for example, of suitable paper, on the end faces 5,5 'of the catalyst 4 for the fact that in no case core sand from those to be placed on the front Manifold cores 8,8 'due to unfavorable circumstances Kat coating in the flow channels 4 '(only schematically in Figure 3 indicated) can reach the catalyst 4, the Powder filling in the channels 4 'on the one hand for support of the two thin protective films 7 and on the other hand for this ensures that no film remains in their "burning away" during the Gusses get into the flow channels 4 ', which the catalyst effect would affect.
  • the catalyst 4 is ceramic acts, this is advantageous with a so-called inflatable mat 12 (e.g. fleece made of refractory fibers with embedded vermiculite particles) envelops, which swells when heated and the ceramic monoliths forming the catalyst safely in the cast Exhaust manifold fixed. Also painting the ceramic monolith with so-called slip can be considered become.
  • an inflatable mat 12 it is required, as also indicated in Fig. 3, after cover the top and bottom with so-called fade protection rings 13. To further move such an inflatable mat 12 To prevent the casting process, this can be done with the outer surface of the catalyst 4 glued and / or with a winding thin wire 14 (see Fig. 4) can be fixed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP98932045A 1997-05-03 1998-05-01 Abgaskrümmer für verbrennungsmotoren und verfahren zu seiner herstellung Expired - Lifetime EP0914548B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19718853A DE19718853A1 (de) 1997-05-03 1997-05-03 Abgaskrümmer für Verbrennungsmotoren und Verfahren zu seiner Herstellung
DE19718853 1997-05-03
PCT/DE1998/001213 WO1998050687A1 (de) 1997-05-03 1998-05-01 Abgaskrümmer für verbrennungsmotoren und verfahren zu seiner herstellung

Publications (2)

Publication Number Publication Date
EP0914548A1 EP0914548A1 (de) 1999-05-12
EP0914548B1 true EP0914548B1 (de) 2002-07-31

Family

ID=7828615

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98932045A Expired - Lifetime EP0914548B1 (de) 1997-05-03 1998-05-01 Abgaskrümmer für verbrennungsmotoren und verfahren zu seiner herstellung

Country Status (6)

Country Link
EP (1) EP0914548B1 (pl)
AT (1) ATE221615T1 (pl)
DE (2) DE19718853A1 (pl)
PL (1) PL193602B1 (pl)
SK (1) SK181198A3 (pl)
WO (1) WO1998050687A1 (pl)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100309839B1 (ko) * 1999-07-15 2001-11-01 이계안 차량용 배기가스의 후처리 장치
DE10145876A1 (de) * 2001-09-18 2003-04-10 Daimler Chrysler Ag Vorrichtung zur Herstellung eines Druckgussbauteils mit einem Kern und einem Einlegeteil
DE10159158A1 (de) * 2001-12-01 2003-06-18 Deutz Ag Abgassammeldämpfer mit integriertem Abgasnachbehandlungssystem
AU2002346693A1 (en) * 2001-12-07 2003-06-23 Dan T. Moore Company Insulated exhaust manifold having internal catalyst support body
US6725656B2 (en) 2001-12-07 2004-04-27 Dan T. Moore Company Insulated exhaust manifold
DE20302615U1 (de) * 2003-02-17 2004-07-15 Tower Automotive Gmbh & Co. Kg Hohlformteil mit geschlossenem Querschnitt und einer Verstärkung
DE102004018693B4 (de) * 2004-04-17 2007-09-06 Daimlerchrysler Ag Abgasanlage
EP3190279B1 (en) * 2014-09-03 2019-05-08 Nissan Motor Co., Ltd Exhaust device for internal combustion engine
CN109296435B (zh) * 2018-09-06 2024-07-05 中国第一汽车股份有限公司 一种改善发动机冷态启动排放的排气歧管结构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE453968B (sv) * 1985-02-01 1988-03-21 Kanthal Ab Gjuten metallkropp och sett att framstella densamma
JPH05140700A (ja) * 1991-11-15 1993-06-08 Mazda Motor Corp フエライト系耐熱鋳鋼部材及びその製造法
EP0761939A1 (en) * 1995-08-16 1997-03-12 General Motors Corporation Manifold converter

Also Published As

Publication number Publication date
ATE221615T1 (de) 2002-08-15
SK181198A3 (en) 1999-05-07
EP0914548A1 (de) 1999-05-12
WO1998050687A1 (de) 1998-11-12
DE19718853A1 (de) 1998-11-05
PL193602B1 (pl) 2007-02-28
DE59804978D1 (de) 2002-09-05
PL330715A1 (en) 1999-05-24

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