EP0355729A1 - Abgasanlage einer mehrzylindrigen Brennkraftmaschine - Google Patents

Abgasanlage einer mehrzylindrigen Brennkraftmaschine Download PDF

Info

Publication number
EP0355729A1
EP0355729A1 EP89115242A EP89115242A EP0355729A1 EP 0355729 A1 EP0355729 A1 EP 0355729A1 EP 89115242 A EP89115242 A EP 89115242A EP 89115242 A EP89115242 A EP 89115242A EP 0355729 A1 EP0355729 A1 EP 0355729A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
mixing tube
exhaust
tubes
cleaning device
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.)
Ceased
Application number
EP89115242A
Other languages
German (de)
English (en)
French (fr)
Inventor
Michael Rieser
Norbert Kraus
Kurt Dusl
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0355729A1 publication Critical patent/EP0355729A1/de
Ceased 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust 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
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1439—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the position of the sensor

Definitions

  • the invention relates to an exhaust system according to the preamble of claim 1, wherein of course a single cylinder also falls under the term cylinder group.
  • the general idea of the invention can also be applied to a larger number of cylinder group exhaust gas flows.
  • the technological environment for the present invention is described in DE-OS 27 25 943 and DE-OS 27 25 944.
  • the exhaust gases of the individual cylinders of an internal combustion engine are usually brought together before entering an exhaust gas cleaning device.
  • the exhaust gas purification devices designed as three-way catalytic converters in order to achieve the most complete exhaust gas aftertreatment or successful conversion of harmful components, place high demands on the exhaust gas flow supplied to them. For this reason, a mixture corresponding to the stoichiometric air / fuel ratio is fed to the internal combustion engine. To regulate this mixture, an oxygen sensor protruding into the exhaust gas flow is provided.
  • the composition of the exhaust gases of the individual cylinders can differ, for example due to tolerances in the mixture formation system.
  • the individual cylinder exhaust gas streams are mixed as intensively as possible in order to ensure homogeneous exhaust gas distribution over the cross section of the catalytic converter.
  • long mixing distances are required, which conflict with the known requirement of arranging the catalyst as close as possible to the internal combustion engine for temperature reasons.
  • such a long mixing section requires the individual cylinder exhaust gas flows to be brought together shortly behind the internal combustion engine, which, however, has a disruptive effect on the gas dynamics in the exhaust system and thus reduces the output provided by the internal combustion engine.
  • DE-OS 27 25 943 proposes to carry out the individual exhaust gas flows separately beyond the catalyst.
  • the problem of the exhaust gas composition which differs for the individual cylinders or groups of cylinders appears to be increasingly evident; a successful pollutant conversion is not possible with that solution.
  • the proposal made in DE-OS 27 25 944 to use the oxygen sensor immediately after the last exhaust manifold so that it is acted upon by a representative gas mixture of all cylinders does not remedy this.
  • the object of the present invention is to show an exhaust system of a multi-cylinder internal combustion engine, with the aid of which the exhaust gas in particular Catalytic exhaust gas purification device is supplied homogeneously distributed over the cross section. This object is achieved by the characterizing features of the first claim.
  • a short mixing tube is sufficient for this purpose, in which the two exhaust gas streams, for example in a vehicle exhaust system, are juxtaposed when viewed from above, in order to then leave this relatively short mixing tube again via two tubes which are essentially one above the other.
  • the exhaust gas flows entering the mixing tube side by side are thus virtually halved and leave the mixing tube with the other half exhaust gas flow.
  • the features of the third claim reduce the installation space of an exhaust system according to the invention
  • the features of claim 4 in particular offer simplifications in terms of production technology.
  • Such insulation coverings are known per se and are intended to prevent excessive heat radiation.
  • FIG. 2 shows the partial section A-A from FIG. 1.
  • the exhaust gases of a six-cylinder internal combustion engine 1 are fed to an exhaust gas purification device (catalytic converter) 3 via an exhaust gas system, designated as a whole by 2.
  • an exhaust gas purification device catalytic converter
  • three cylinders of the internal combustion engine are combined to form cylinder groups 5a, 5b, the exhaust gas flows of which are fed to a mixing tube 9 via downpipes 7a, 7b and, in accordance with the projection shown, enter this mixing tube 9 side by side.
  • the combined exhaust gas flow leaves the mixing tube 9 via two tubes 11a, 11b, which are arranged one above the other in this projection. Next to each other again these tubes then open into the housing of the catalytic converter 3, a lambda probe 13 being provided upstream of the mouth in the tube 11b.
  • This design of the exhaust system 2 ensures that the catalytic converter 3 is exposed to exhaust gas of the same composition over its cross section.
  • the exhaust gases of the individual cylinders or cylinder groups 5a, 5b can have different compositions.
  • the distributor principle can be implemented in a simplified manner both in terms of construction and production technology by providing the short mixing tube 9.
  • the exhaust system according to the invention is provided in a motor vehicle, it is advisable to limit the installation space required by the tubes lying side by side and / or one above the other being of oval or semicircular cross section. Manufacturing simplifications also result if, in particular, the two pipes leading from the mixing pipe to the exhaust gas cleaning device have a common insulation jacket.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
EP89115242A 1988-08-23 1989-08-18 Abgasanlage einer mehrzylindrigen Brennkraftmaschine Ceased EP0355729A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3828599 1988-08-23
DE19883828599 DE3828599A1 (de) 1988-08-23 1988-08-23 Abgasanlage einer mehrzylindrigen brennkraftmaschine

Publications (1)

Publication Number Publication Date
EP0355729A1 true EP0355729A1 (de) 1990-02-28

Family

ID=6361432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89115242A Ceased EP0355729A1 (de) 1988-08-23 1989-08-18 Abgasanlage einer mehrzylindrigen Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0355729A1 (en, 2012)
DE (1) DE3828599A1 (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677077A1 (fr) * 1991-05-31 1992-12-04 Renault Dispositif de raccordement de conduits d'echappement et collecteur d'echappement equipe de ce dispositif.
WO2000066884A1 (de) * 1999-05-03 2000-11-09 Andreas Werth Sammelrohr-anordnung für auspuffanlagen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504709A (en) * 1965-10-07 1970-04-07 Gen Motors Corp Branched conduit
DE3029012A1 (de) * 1980-07-31 1982-02-11 Audi Nsu Auto Union Ag, 7107 Neckarsulm Abgasleitung fuer eine mehrzylindrige brennkraftmaschine
EP0192995A1 (de) * 1985-02-22 1986-09-03 Friedrich Boysen GmbH & Co. KG Abgasrohrkrümmer
DE3740238A1 (de) * 1986-12-04 1988-06-23 Audi Ag Abgasanlage fuer eine brennkraftmaschine mit zwei zylinderbaenken

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725943A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Katalysator
DE2725944A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Abgasreinigungsanlage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3504709A (en) * 1965-10-07 1970-04-07 Gen Motors Corp Branched conduit
DE3029012A1 (de) * 1980-07-31 1982-02-11 Audi Nsu Auto Union Ag, 7107 Neckarsulm Abgasleitung fuer eine mehrzylindrige brennkraftmaschine
EP0192995A1 (de) * 1985-02-22 1986-09-03 Friedrich Boysen GmbH & Co. KG Abgasrohrkrümmer
DE3740238A1 (de) * 1986-12-04 1988-06-23 Audi Ag Abgasanlage fuer eine brennkraftmaschine mit zwei zylinderbaenken

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677077A1 (fr) * 1991-05-31 1992-12-04 Renault Dispositif de raccordement de conduits d'echappement et collecteur d'echappement equipe de ce dispositif.
WO2000066884A1 (de) * 1999-05-03 2000-11-09 Andreas Werth Sammelrohr-anordnung für auspuffanlagen

Also Published As

Publication number Publication date
DE3828599C2 (en, 2012) 1992-06-25
DE3828599A1 (de) 1990-03-08

Similar Documents

Publication Publication Date Title
EP0329707B1 (de) Abgasanlage für eine brennkraftmaschine mit zwei zylinderbänken
DE69513092T2 (de) Ein Verfahren zur Anwendung eines Schalldämpfers und eine Vorrichtung zur Anwendung des Verfahrens in einem grossen Dieselmotor
DE2351979A1 (de) Anordnung zur abgas-nachverbrennung
EP1180583A2 (de) Mehrzylinder-Brennkraftmaschine mit einer Vorrichtung zum Katalysator-Heizen
DE3139309A1 (de) Brennkraftmaschine
DE102021111759A1 (de) Abgasbehandlungsmodul
EP0422432A1 (de) Verfahren zur Abgasnachbehandlung an einer Brennkraftmaschine
DE2238256A1 (de) Auspuffsammler
EP0205895A1 (de) Abgasleitung einer Brennkraftmaschine
DE2258225A1 (de) Vorrichtung zum speisen eines mehrzylinder-ottomotors mit kraftstoff-luftgemisch
EP0835366A1 (de) Katalysatoranordnung mit zwei- oder mehrsträngiger abgasführung
DE19755126A1 (de) Katalysatoranordnung mit zweisträngiger Abgasführung
DE19744596A1 (de) Abgasrückführventil
DE102019134859A1 (de) Sekundärluftsystem und Abgasanlage mit einem solchen Sekundärluftsystem
DE69200818T2 (de) Vorrichtung an Ansaugsystemen für Brennkraftmaschinen.
DE2615944A1 (de) Verfahren zum betreiben einer brennkraftmaschine und brennkraftmaschine zur durchfuehrung dieses verfahrens
DE3721810A1 (de) Abgasanlage fuer eine brennkraftmaschine mit zwei zylinderbaenken
EP0192995B1 (de) Abgasrohrkrümmer
EP0355729A1 (de) Abgasanlage einer mehrzylindrigen Brennkraftmaschine
EP1291500A2 (de) Abgasanlage für mehrzylindrige Verbrennungsmotoren
DE10101593B4 (de) Verfahren zum Betreiben eines mit direkter Kraftstoffeinspritzung in den Brennraum versehenen Verbrennungsmotors
DE4445490A1 (de) Vorrichtung zur Abgasentgiftung an einer Brennkraftmaschine
AT2489U1 (de) Hubkolbenbrennkraftmaschine mit fremdzündung
EP0704611B1 (de) Kraftstoffzufuhr-Vorrichtung für flüssigen oder gasförmigen Kraftstoff
DE2335036A1 (de) Mit einem abgasturbolader ausgeruestete mehrzylinderbrennkraftmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19900329

17Q First examination report despatched

Effective date: 19910403

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19911017