WO1998007967A1 - Circuit des gaz d'echappement dans un moteur a combustion interne - Google Patents

Circuit des gaz d'echappement dans un moteur a combustion interne Download PDF

Info

Publication number
WO1998007967A1
WO1998007967A1 PCT/EP1997/004479 EP9704479W WO9807967A1 WO 1998007967 A1 WO1998007967 A1 WO 1998007967A1 EP 9704479 W EP9704479 W EP 9704479W WO 9807967 A1 WO9807967 A1 WO 9807967A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
exhaust system
section
guide device
exhaust
Prior art date
Application number
PCT/EP1997/004479
Other languages
German (de)
English (en)
Inventor
Jürgen Schorn
Manfred Hein
Original Assignee
Dr. Ing. H.C.F. Porsche Aktiengesellschaft
Heinrich Gillet Gmbh & Co. Kg
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 Dr. Ing. H.C.F. Porsche Aktiengesellschaft, Heinrich Gillet Gmbh & Co. Kg filed Critical Dr. Ing. H.C.F. Porsche Aktiengesellschaft
Publication of WO1998007967A1 publication Critical patent/WO1998007967A1/fr

Links

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
    • F01N3/2892—Exhaust flow directors or the like, e.g. upstream of catalytic device
    • 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
    • F01N2470/06—Tubes being formed by assembly of stamped or otherwise deformed sheet-metal

Definitions

  • the invention relates to an exhaust system of an internal combustion engine according to the preamble of the main claim.
  • an exhaust system of an internal combustion engine with an oval-cylindrical catalytic converter housing, a cylindrical exhaust pipe and an inflow funnel arranged between them is known, in which the inflow funnel is provided with guide devices for influencing the exhaust gas flow.
  • These guide devices are intended to achieve a uniformity in the flow through the catalyst, the guide device being arranged in such a way that the exhaust gas is applied uniformly to the catalyst support over its entire oval end face.
  • two opposite guide devices in the form of impressions of the housing are arranged so that they are located on the two less curved side surfaces and, through their V-shaped design, redirect the exhaust gases into the outer regions to the more curved side surfaces.
  • Such an inlet connection is suitable for exhaust systems in which the axes of the inlet-side exhaust pipe and the catalyst carrier or the catalyst housing are aligned with one another or run parallel to one another. If the exhaust system is designed in such a way that the axes of the exhaust pipe and the catalyst carrier are not aligned or run parallel to one another due to the cramped installation space, it is no longer possible to apply the catalyst housing evenly with such an inlet connection. However, in order to achieve a uniform loading, the section of the exhaust pipe that merged into the inlet connection had to be bent very sharply in order to form a parallel or aligned axial direction again. Such a curvature of the exhaust pipe would, however, lead to an undesired increase in the exhaust gas back pressure.
  • a guide device is arranged in the inflow nozzle so that it is related to the flow pattern at its longer outer section, a targeted detachment of the flow from the outer wall reached. This leads to an equalization of the inflow of the catalyst carrier and in particular ensures an increased inflow of air to the section of the catalytic converter housing located internally (based on the angle between the two axes).
  • Such a guide device can be produced particularly simply and inexpensively if it is designed as a pressed-in section of the housing of the inflow funnel.
  • the guiding device can be molded from a manufacturing point of view already during the shaping of the housing of the inflow connection piece, so that additional manufacturing steps are not necessary.
  • a particularly uniform flow against the catalyst housing or the catalyst carrier is achieved if the guide device is provided with a tear-off edge on the inflow nozzle. By means of this tear-off edge, a targeted deflection of the exhaust gas flow and an equalization over the surface to be flown are achieved.
  • a particularly good detachment of the exhaust gas flow from the area of the outer wall is achieved if the guide device has an inflow section which is bent outward in the flow direction and which is followed by the tear-off edge. This design improves the detachment of the wall flow again.
  • a particularly simple to manufacture and inexpensive construction of the exhaust system results when the inflow funnel is composed of at least two shell-like housing parts, the guide device advantageously being completely formed in one of the shell-like housing parts.
  • Fig. 2 is a view of the inlet port in the direction II of FIG. 1 and
  • FIG. 3 is a view of a half-shell of the inlet connector in the direction III of FIG. 1st
  • the exhaust system of an internal combustion engine which is partially shown in FIGS. 1 to 3, has a catalytic converter housing 1 which in this exemplary embodiment is circular-cylindrical and in which a catalytic converter support (not shown in detail) is arranged.
  • This catalytic converter housing 1 is connected via an inlet connection 2 arranged at the end to an inlet-side exhaust pipe 3, which is connected to the combustion chambers of the internal combustion engine, also not shown, via an exhaust pipe elbow (not shown).
  • the exhaust pipe 3 is oval-cylindrical.
  • the main axis 4 of the exhaust pipe extends in the inlet area into the inlet connection 2 at an angle ⁇ of approximately 115 ° to the longitudinal axis 5 of the catalyst housing 1.
  • the inflow neck 2 consists of two half-shells 6, 7.
  • the half-shell 6 has a short, cylindrically shaped connecting piece 8 which is connected to the catalyst housing 1 in the region of the end face 9 thereof.
  • the half-shell 6 On the side facing away from the catalytic converter housing 1, the half-shell 6 has a fastening edge 10 which is angled outward in the manner of a collar and against which a corresponding fastening edge 11 of the half-shell 7 which is angled in the manner of a collar bears.
  • the assembled half-shells 6 and 7 have an extension in the form of a second socket 12, which serves to receive and fasten the exhaust pipe 3.
  • the half-shell 7 is formed in the plan view according to FIG. 3 (seen from the closed side facing away from the catalyst housing 1) as a round cover element 13, to which the socket 12 or the part of the socket 12 formed by the half-shell 7 is formed laterally .
  • the cover element 13 is arranged obliquely with respect to the end face 9 of the catalyst housing 1. Its flat orientation shown in FIG. 1 corresponds essentially to the axial direction of the main axis 4.
  • the cover element 13 has a section 14 pressed inwards towards the catalyst housing 1, which serves as a guiding device for the exhaust gas flow. This indented section 14 is, seen in plan view, approximately triangular and is located in the lower half of the cover element 13 facing the connector 12.
  • the base 15 of the indented section 14 is - as previously mentioned - approximately triangular with two identical legs 16 and 17 formed, which in this embodiment form an angle of approximately 110 °.
  • the tip of the triangle formed by the two legs 16 and 17 faces the nozzle 12 and is located approximately in the region of the transition 18 between the nozzle 12 and the circular surface of the cover element 13.
  • the base 19 of the base 15 of the pressed-in section 14 is light Provide outward curvature (seen from nozzle 12).
  • the length of the two legs 16 and 17 is dimensioned such that they extend close to the edge of the cover element 13.
  • the edge 20 formed by the indentation of the base surface 15 is between the base side 19 and the adjacent, not indented area of the cover element 13 formed so that the transition 21 to the non-depressed area of the cover element is approximately at right angles.
  • the transition 22 between the base 15 and the edge 20 is made at an acute angle, which has a relatively small radius of curvature. This transition 22 serves as a tear-off edge for the exhaust gas flow.
  • the base surface 15 is provided with a slight external curvature.
  • the half-shell 7 provided with the guiding device is covered on its outside by an additional half-shell 23, which is also connected to the edge 10 and 11, respectively.
  • Catalyst housing 1 is deflected. This will make it more even
  • the design of the inlet connection 2 and the arrangement of the guide device or the pressed-in section 14 are provided such that they are located on the longer outer section 24 of the inlet connection in relation to the flow pattern.
  • the position and size of the guide device and the position of the transition 22 and thus the tear-off edge are essentially dependent on the diameters or half-diameters of the catalytic converter housing 1 and the exhaust pipe 3 and on the angle of the two main axes 4 and 5.
  • the embodiment described can be produced as a deep-drawn molded part with little production outlay.
  • the tear-off edge or the guiding device can also be formed by an element inserted, for example welded, in the inlet connection 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Le circuit des gaz d'échappement décrit dans la présente invention comporte une tubulure d'admission (2) située entre le tuyau d'échappement (3) côté entrée et le support de catalyseur (1). Dans le but de permettre une exposition aux gaz homogène de l'enveloppe de catalyseur et du support de catalyseur en dépit du fait que le tuyau d'échappement et l'enveloppe de catalyseur forment un angle, un dispositif de guidage est formé dans la tubulure d'admission, lequel est disposé sur le tronçon extérieur le plus long de la tubulure d'admission par rapport au profil d'écoulement.
PCT/EP1997/004479 1996-08-21 1997-08-16 Circuit des gaz d'echappement dans un moteur a combustion interne WO1998007967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19633563.9 1996-08-21
DE1996133563 DE19633563C2 (de) 1996-08-21 1996-08-21 Abgasanlage einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO1998007967A1 true WO1998007967A1 (fr) 1998-02-26

Family

ID=7803140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/004479 WO1998007967A1 (fr) 1996-08-21 1997-08-16 Circuit des gaz d'echappement dans un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE19633563C2 (fr)
WO (1) WO1998007967A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2388023A1 (es) * 2009-03-16 2012-10-05 Honda Motor Co. Ltd Dispositivo de escape para motor.
CN104204438A (zh) * 2012-03-22 2014-12-10 五十铃自动车株式会社 内燃机
US20150330279A1 (en) * 2014-05-15 2015-11-19 GM Global Technology Operations LLC External exhaust guiding flow chambers for multiple catalyst architecture
JP2018076856A (ja) * 2016-11-11 2018-05-17 いすゞ自動車株式会社 内燃機関の排気系構造

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772071B1 (fr) * 1997-12-05 2000-01-14 Renault Dispositif d'echappement pour moteur a combustion interne
KR100308952B1 (ko) * 1999-05-10 2001-09-26 이계안 오블리크 클로즈 커플드 캐털리스트 출구측 컨넥터
DE10009124B4 (de) * 2000-02-26 2008-10-23 Volkswagen Ag Katalysator zur Reinigung eines Abgases einer Verbrennungskraftmaschine
JP2006017018A (ja) * 2004-06-30 2006-01-19 Toyota Motor Corp 車両用排気管路の構造
FR2874649B1 (fr) * 2004-08-31 2008-02-22 Faurecia Sys Echappement Organe de purification catalytique
JP4920532B2 (ja) * 2007-09-13 2012-04-18 日野自動車株式会社 排気浄化装置
WO2009139333A1 (fr) * 2008-05-14 2009-11-19 株式会社小松製作所 Dispositif de traitement d'échappement et son procédé de fabrication
FR2935742B1 (fr) * 2008-09-08 2012-08-10 Faurecia Sys Echappement Ensemble de depollution de gaz d'echappement avec deflecteur d'entree
FR2935743A3 (fr) * 2008-09-11 2010-03-12 Renault Sas Ligne d'echappement de moteur a combustion
DE102010006829B4 (de) * 2010-02-03 2013-08-14 Benteler Automobiltechnik Gmbh Abgasanlage
DE102011079906B4 (de) 2011-07-27 2024-09-19 Bayerische Motoren Werke Aktiengesellschaft Abgasanlage für ein Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2345383A1 (de) * 1973-09-08 1975-03-20 Daimler Benz Ag Verbrennungsmotor mit nachverbrennungseinrichtung
DE2843365A1 (de) 1978-10-05 1980-04-24 Daimler Benz Ag Einlaufstutzen zum gleichmaessigen einleiten von verbrennungsmotorabgasen
DE9412553U1 (de) * 1994-08-04 1994-11-10 Schmole, Michael, 50259 Pulheim Abgaskatalysator für Verbrennungsmotoren
DE4408130A1 (de) * 1994-03-10 1995-09-14 Bayerische Motoren Werke Ag Vorrichtung zur Abgasreinigung bei Brennkraftmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA972972A (en) * 1972-04-07 1975-08-19 Stanley B. Wallis Gas distribution system for a catalytic converter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2345383A1 (de) * 1973-09-08 1975-03-20 Daimler Benz Ag Verbrennungsmotor mit nachverbrennungseinrichtung
DE2843365A1 (de) 1978-10-05 1980-04-24 Daimler Benz Ag Einlaufstutzen zum gleichmaessigen einleiten von verbrennungsmotorabgasen
DE4408130A1 (de) * 1994-03-10 1995-09-14 Bayerische Motoren Werke Ag Vorrichtung zur Abgasreinigung bei Brennkraftmaschinen
DE9412553U1 (de) * 1994-08-04 1994-11-10 Schmole, Michael, 50259 Pulheim Abgaskatalysator für Verbrennungsmotoren

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2388023A1 (es) * 2009-03-16 2012-10-05 Honda Motor Co. Ltd Dispositivo de escape para motor.
CN104204438A (zh) * 2012-03-22 2014-12-10 五十铃自动车株式会社 内燃机
US20150089932A1 (en) * 2012-03-22 2015-04-02 Isuzu Motors Limited Internal combustion engine
EP2846016A4 (fr) * 2012-03-22 2016-01-20 Isuzu Motors Ltd Moteur à combustion interne
US9593612B2 (en) 2012-03-22 2017-03-14 Isuzu Motors Limited Internal combustion engine
US20150330279A1 (en) * 2014-05-15 2015-11-19 GM Global Technology Operations LLC External exhaust guiding flow chambers for multiple catalyst architecture
US9551266B2 (en) * 2014-05-15 2017-01-24 GM Global Technology Operations LLC External exhaust guiding flow chambers for multiple catalyst architecture
JP2018076856A (ja) * 2016-11-11 2018-05-17 いすゞ自動車株式会社 内燃機関の排気系構造

Also Published As

Publication number Publication date
DE19633563C2 (de) 1999-04-01
DE19633563A1 (de) 1998-02-26

Similar Documents

Publication Publication Date Title
EP1859160B1 (fr) Dispositif d'injection de carburant
EP0689022B1 (fr) Echangeur de chaleur, spécialement radiateur pour machines à combustion interne de véhicules utilitaires
DE19633563C2 (de) Abgasanlage einer Brennkraftmaschine
DE102006058402A1 (de) Vorrichtung zum Zumischen eines Reduktionsmittels in einen Abgasstrom einer Brennkraftmaschine
DE19938840A1 (de) Mischelement für ein in einem Rohr geführtes Fluid
EP1333219A1 (fr) Raccord à action rapide
WO1997027394A1 (fr) Systeme permettant de fixer une conduite de carburant sur une tubulure
EP1269065B1 (fr) Collier d'une seule piece constitue d'une tole d'acier a ressort pliee destine a de joints a brides
EP3625493B1 (fr) Dispositif de positionnement pour un collier à bande de ressort
WO2009144069A1 (fr) Élément de retenue pour dispositif d'injection de carburant
EP3114345B1 (fr) Silencieux
DE4141556C2 (de) Wärmetauscher für eine Abgasanlage eines Kraftfahrzeuges
WO2016191780A1 (fr) Silencieux de véhicule
DE19752280A1 (de) Vorrichtung zum Verbinden von zwei rohrförmigen Leitungsteilen
DE19500264C1 (de) Vorrichtung zur beweglichen Verbindung von Leitungsenden
EP3047135B1 (fr) Élément de retenue pour un dispositif d'injection de carburant
EP3611354B1 (fr) Mélangeur
DE102010032319A1 (de) Flanschverbindung
EP2915973B1 (fr) Agencement trémie-tube
DE19838588C2 (de) Rohrverbindung zwischen einem Sammler eines Kraftfahrzeugwärmetauschers und einer Rohrleitung sowie Verbindungsschelle für eine solche Rohrverbindung
WO2007137704A1 (fr) Section de collecteur d'échappement ainsi que procédé de fixation d'une tubulure sur un collecteur d'échappement
DE10063474B4 (de) Anschlussverbindung im Abgasstrang von Brennkraftmaschinen, insbesondere für Kraftfahrzeuge
DE102019118284A1 (de) Dünnwandiges Bauteil mit Anschlusseinrichtung und Verfahren zu dessen Herstellung
EP1479885B1 (fr) Système d'échappement
AT400480B (de) Rohrschelle

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998510392

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase