EP0806554A1 - Auspuffanlage für Brennkraftmaschine - Google Patents

Auspuffanlage für Brennkraftmaschine Download PDF

Info

Publication number
EP0806554A1
EP0806554A1 EP97400994A EP97400994A EP0806554A1 EP 0806554 A1 EP0806554 A1 EP 0806554A1 EP 97400994 A EP97400994 A EP 97400994A EP 97400994 A EP97400994 A EP 97400994A EP 0806554 A1 EP0806554 A1 EP 0806554A1
Authority
EP
European Patent Office
Prior art keywords
monolithic element
internal combustion
exhaust
catalytic converter
combustion engine
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.)
Withdrawn
Application number
EP97400994A
Other languages
English (en)
French (fr)
Inventor
Bernard Dechereux
Patrick Gastaldi
Thierry Fillion
Christophe Gondion
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 SA
Original Assignee
Renault SA
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 Renault SA filed Critical Renault SA
Publication of EP0806554A1 publication Critical patent/EP0806554A1/de
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F01N3/24—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
    • 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 exhaust gas passages, pipes or tubes
    • F01N2470/18—Structure or shape of exhaust gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus

Definitions

  • the present invention relates to an exhaust device for a multi-cylinder internal combustion engine intended in particular to equip a motor vehicle, and more particularly to an exhaust device suitable for homogenizing the flow of burnt gases through a catalytic converter when this is arranged downstream of an elbow.
  • the exhaust gas exhaust device of a multi-cylinder internal combustion engine comprises an exhaust manifold fixed to the cylinder head of the engine and an exhaust line formed by tubes, a catalytic converter, trigger, muffler, etc. which extends to the outlet to the open air.
  • one solution disclosed by document FR-A1-2,703,297, consists in using a monolithic element with a curved honeycomb structure. This solution is however complex to carry out and therefore expensive to manufacture.
  • the present invention therefore aims to remedy these various drawbacks with an exhaust device for an internal combustion engine allowing a homogeneous distribution of the exhaust gases inside a catalytic converter located near and at the outlet of '' an elbow that is simple and economical to make.
  • the exhaust device for a multicylinder internal combustion engine comprises an exhaust manifold which is fixed to the cylinder head of the engine and an exhaust line provided with a catalytic converter of the type comprising inlet ends and outlet, and an oblong body in which is housed a first monolithic element comprising multiple channels arranged longitudinally and coated with catalytic substances, the exhaust line being shaped so that the path of the burnt gases forms a bend before entering the catalytic converter.
  • the exhaust device for an internal combustion engine is characterized in that flow rectifier means are arranged at the elbow, the flow rectifier means being formed by a second monolithic element, the channels of which are arranged in the axis of the first monolithic element.
  • the inlet end of the burnt gases in the second monolithic element is truncated.
  • the longitudinal channels of the second monolithic element are coated with an active catalytic substance such as a priming catalyst.
  • the inlet end of the second monolithic element forms an angle between 15 ° and 30 ° with the plane normal to the longitudinal axis of the second monolithic element.
  • the elbow extends to the level of the connection of a turbocharger with the catalytic converter.
  • the elbow extends at the connection of the exhaust manifold with the exhaust line.
  • the catalytic converter is connected directly to the exhaust manifold, the second monolithic element being inserted partly in the inlet of the catalytic converter and partly in the exhaust manifold.
  • the exhaust manifold consists of a single oblong capacity of triangular shape and suitable volume, the part of the cavity coming from the front with the engine cylinder head forming the base of the triangle, the opposite vertex of the triangular cavity having a single outlet opening intended to be connected directly to the catalytic converter, the catalytic converter then being arranged perpendicular to the exhaust manifold.
  • the outlet end of the burnt gases from the second monolithic element is truncated parallel to its inlet end and / or the inlet and outlet ends of the first monolithic element are truncated parallel to the outlet end of the second monolithic element.
  • the first monolithic element and the second monolithic element are one.
  • FIGS. 1a and 1b show a first embodiment of the exhaust device according to the invention
  • the exhaust manifold 101 consists of a single oblong capacity, of triangular shape in the plane of the cylinder head 104, this capacity having a single outlet opening, in its lower part, intended to be connected directly to a catalytic converter 102. Connecting the catalytic converter 102 to the manifold exhaust 101 is carried out perpendicularly, thereby obtaining a compact assembly in the engine compartment. The connection of the catalytic converter 102 with the exhaust pipe 101 forms an elbow 107 causing a change of direction of 90 ° in the burnt gases.
  • the catalytic converter 102 is also connected to an exhaust line 103 comprising conventional elements such as an expansion pot and a silencer not shown in the figures.
  • the catalytic converter 102 comprises a first monolithic element 105 consisting of a regular network of channels parallel to each other and arranged in the longitudinal axis of the catalytic converter 102. These channels are coated with a active catalytic substance, for example based on precious metals and metal oxide, allowing the treatment of polluting substances contained in the burnt gases.
  • a second monolithic element 106 is arranged at the level of the elbow 107 formed by the connection of the manifold 101 with the catalytic converter 102.
  • the second monolithic element 106 comprises, similarly to the first monolithic element 105, multiple channels oriented in the axis of the first monolithic element 105 so as to bring the gas flow in the direction thereof, these channels being able to be coated of substances active catalysts for the treatment of burnt gases.
  • the inlet end 108 of the burnt gases of the second monolithic element 106 is truncated so as to have an inlet face inclined in the direction of the flow of the burnt gases.
  • the inclination of this inlet end 108 is, in the example, between 15 ° and 30 ° and depends on several parameters including the diameter of the monolithic element 106 and the characteristics of the cavity forming the exhaust manifold 101.
  • This inclination of the inlet end 108 makes it possible to increase the passage section, in the direction of the burnt gases, of the channels of the second monolithic element 106 and thus to obtain better filling of the latter.
  • the length of the second monolithic element 106 is adapted so that the outlet face of the latter is situated approximately at the level of the inlet of the diverging portion of the catalytic converter 102.
  • the substantially homogeneous distribution of the gases in the channels of the monolithic element 106 then allows the homogeneous diffusion of the burnt gases at the inlet of the diverging part of the catalytic converter 102 and therefore a homogeneous distribution of the gases in the channels of the first monolithic element 105. This arrangement allows thus optimizing the efficiency of the catalytic converter 102.
  • the installation of the monolithic element 106 in the elbow 107 therefore makes it possible to reduce strongly uneven distribution of the burnt gases in the catalytic converter 102, linked to the presence of the elbow 107, and thus reduce the risks of premature aging of the catalytic converter 102.
  • FIG. 2 shows a second embodiment of the exhaust device according to the invention, for an internal combustion engine comprising a turbocharger 212 interposed between an exhaust manifold, not shown in the figure, and a catalytic converter 202 similar to that of the device of FIG. 1b, arranged perpendicular to the axis of the turbocharger 212 so as to keep a compact assembly.
  • the elbow 207 formed by the connection of the outlet of the turbine of the turbocharger 212 with the inlet of the catalytic converter 202 comprises a second monolithic element 206 whose function and advantages are identical to those described for the device in FIG. 1b.
  • the immediate proximity of the catalytic converter 202 with the turbocharger 212 then makes it possible to maintain a temperature of the burnt gases sufficient for the correct operation of the catalytic converter 202.
  • Figure 3 shows a third embodiment of the exhaust device according to the invention.
  • the first monolithic element 305 of the catalytic converter 302 and the second monolithic element 306 located in the elbow 307 differ from the elements described for the first embodiment of the exhaust device according to the invention of Figure 1b.
  • the inlet 310 and outlet 311 ends of the first monolithic element 305 as well as the outlet end 309 of the second monolithic element 306 are truncated parallel to the inlet end 308 of the second monolithic element 306, the inclination is chosen according to criteria similar to those described for the first embodiment of the exhaust device of Figure 1b.
  • the divergent cone of the catalytic converter 302 is adapted so that its entry surface coincides with the exit end 309 of the second monolithic element 306 and that its exit surface coincides with the entry end 310 of the first element monolithic 305.
  • the inclination of the inlet end 308 of the second monolithic element 306 makes it possible, as for the first embodiment of FIG. 1b, to homogenize the flow of the burnt gases in the channels of the second monolithic element 306 and therefore to homogenize the diffusion of the burnt gases at the input of the first monolithic element 305.
  • the inclination of the ends of the first and second monolithic element 305 and 306 parallel to the inlet end 308 makes it possible to maintain an identical length of all the channels of the monolithic elements.
  • the coefficient of pressure losses of a channel being linked to its length, the equality of the length of the channels makes it possible to obtain identical pressure drop coefficients in each channel, which is favorable for a homogeneous distribution of the gases burned in the first and second monolithic element 305 and 306.
  • the inclination of the outlet end 311 of the first monolithic element 305 in the direction of the exhaust line 303 also makes it possible to make the connection of the catalytic converter 302 with the exhaust line 303 more compact by making a perpendicular connection of the exhaust line 303 on the catalytic converter 302 at the level of the space freed by the inclination of the outlet end 311.
  • a second monolithic element 306 according to the exhaust device according to the invention therefore makes it possible to straighten and homogenize the flow at the outlet of an elbow and to participate in the purification of the burnt gases thanks to the catalytic substances it contains.
  • the third embodiment of FIG. 3 therefore presents an optimization of the exhaust device presented in FIG. 1b.
  • Figure 4 shows a fourth embodiment of the exhaust device according to the invention.
  • only the second monolithic element 406 located in the elbow differs from the elements described for the first embodiment of the exhaust device of FIG. 1b.
  • the monolithic element 406 used in this embodiment is a conventional monolith whose inlet faces 408 and outlet 409 are perpendicular to the axis of the monolith.
  • This monolithic element 406 has the particularity of having an inlet face 408 disposed at the outlet opening of the collector 401 and in the extension of the lower face of the latter.
  • the second monolithic element 406 has a length adapted so that the outlet face 409 of the latter is disposed approximately at the level of the inlet of the diverging portion of the catalytic converter 402 so as to optimize the diffusion of the exhaust gases at the outlet from the second monolithic 406.
  • This embodiment while remaining less effective than the embodiments presented in FIGS. 1b to 3, makes it possible to clearly improve the diffusion of the burnt gases downstream of the first monolithic element 405 of the catalytic converter 402 compared to the diffusion obtained when the second monolithic element 406 is not present.
  • This embodiment has the advantage of being industrializable with very low cost and of providing a marked improvement in the diffusion of the burnt gases through the catalytic converter and in improving the purification of the burnt gases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
EP97400994A 1996-05-10 1997-05-02 Auspuffanlage für Brennkraftmaschine Withdrawn EP0806554A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605826A FR2748518B1 (fr) 1996-05-10 1996-05-10 Dispositif d'echappement pour moteur a combustion interne
FR9605826 1996-05-10

Publications (1)

Publication Number Publication Date
EP0806554A1 true EP0806554A1 (de) 1997-11-12

Family

ID=9492007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400994A Withdrawn EP0806554A1 (de) 1996-05-10 1997-05-02 Auspuffanlage für Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0806554A1 (de)
FR (1) FR2748518B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860035A1 (fr) * 2003-09-19 2005-03-25 Renault Sa Ensemble d'echappement d'un moteur thermique suralimente
FR3060409A1 (fr) * 2016-12-16 2018-06-22 Peugeot Citroen Automobiles Sa Organe de traitement de gaz a corps de traitement en biseau
EP3234315B1 (de) * 2014-12-18 2019-08-28 Renault S.A.S. Fahrzeugantriebseinheit mit verbessertem abgasreinigungssystem

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3061517A1 (fr) * 2017-01-04 2018-07-06 Peugeot Citroen Automobiles Sa Organe de traitement de gaz a corps de traitement de gaz en biseau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182120A (en) * 1973-03-20 1980-01-08 Ethyl Corporation Exhaust systems
JPS5872613A (ja) * 1981-10-26 1983-04-30 Toyota Motor Corp 自動車エンジン用エキゾ−ストマニホルド
JPH0427705A (ja) * 1990-02-26 1992-01-30 Nippon Shokubai Co Ltd ディーゼルエンジン排ガスの浄化方法
US5220789A (en) * 1991-03-05 1993-06-22 Ford Motor Company Integral unitary manifold-muffler-catalyst device
FR2703297A1 (fr) * 1993-03-31 1994-10-07 Ngk Insulators Ltd Elément à structure en nid d'abeille courbe.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182120A (en) * 1973-03-20 1980-01-08 Ethyl Corporation Exhaust systems
JPS5872613A (ja) * 1981-10-26 1983-04-30 Toyota Motor Corp 自動車エンジン用エキゾ−ストマニホルド
JPH0427705A (ja) * 1990-02-26 1992-01-30 Nippon Shokubai Co Ltd ディーゼルエンジン排ガスの浄化方法
US5220789A (en) * 1991-03-05 1993-06-22 Ford Motor Company Integral unitary manifold-muffler-catalyst device
FR2703297A1 (fr) * 1993-03-31 1994-10-07 Ngk Insulators Ltd Elément à structure en nid d'abeille courbe.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 165 (M - 230) 20 July 1958 (1958-07-20) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 191 (M - 1245) 8 May 1992 (1992-05-08) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2860035A1 (fr) * 2003-09-19 2005-03-25 Renault Sa Ensemble d'echappement d'un moteur thermique suralimente
EP3234315B1 (de) * 2014-12-18 2019-08-28 Renault S.A.S. Fahrzeugantriebseinheit mit verbessertem abgasreinigungssystem
FR3060409A1 (fr) * 2016-12-16 2018-06-22 Peugeot Citroen Automobiles Sa Organe de traitement de gaz a corps de traitement en biseau

Also Published As

Publication number Publication date
FR2748518A1 (fr) 1997-11-14
FR2748518B1 (fr) 1998-06-12

Similar Documents

Publication Publication Date Title
EP0057623B1 (de) Abgassschalldämpfer einer Wärmekraftmaschine
EP0584350B1 (de) Abgasleitung für eine zweitakt-brennkraftmaschine
EP1036259B1 (de) Auspuffanlage für eine brennkraftmaschine
FR2744763A1 (fr) Turbocompresseur entraine par les gaz d'echappement d'un moteur a combustion interne
EP0806554A1 (de) Auspuffanlage für Brennkraftmaschine
FR2473631A1 (fr) Moteur a combustion interne a quatre temps
FR2506837A1 (fr) Conduit pour les gaz d'echappement a monter entre un moteur a combustion interne et un turbo-compresseur a gaz d'echappement
FR3107304A1 (fr) Dispositif catalytique pour traitement des gaz d’echappement d’un moteur a combustion interne
EP3365547B1 (de) Schalldämpfende vorrichtung für eine ansaugleitung
FR2527686A1 (fr) Moteur a combustion interne a plusieurs cylindres, equipe de la combinaison d'un turbo-compresseur et d'un compresseur de suralimentation a inertie
FR2663986A1 (fr) Collecteur d'echappement pour moteur a combustion interne, et moteur a combustion interne comportant un tel collecteur.
FR2752880A1 (fr) Dispositif de suralimentation pour moteur a combustion interne
FR3040193B1 (fr) Systeme de reduction catalytique selective
EP0718480A1 (de) Abgasanlage für Brennkraftmaschine
FR3109606A1 (fr) Dispositif catalytique pour traitement des gaz d’echappement d’un moteur, comportant un organe d’injection d’air
FR2545875A1 (fr) Systeme d'echappement d'un moteur a combustion interne a turbocompresseur
FR2859238A1 (fr) Dispositif de regulation thermique de gaz d'echappement
FR2673454A1 (fr) Chambre de combustion comportant une paroi de fond comprenant une pluralite de troncs de cones partiels.
EP3827161A1 (de) Wärmedämmvorrichtung für den auspuff einer wärmekraftmaschine
FR2738289A1 (fr) Dispositif d'echappement pour moteur a combustion interne
FR2851789A1 (fr) Moteur a combustion interne de vehicule automobile
EP0380407A1 (de) Auspuffkrümmer für eine aufgeladene innere Brennkraftmaschine
FR2860035A1 (fr) Ensemble d'echappement d'un moteur thermique suralimente
EP0592258A1 (de) Abgasvorrichtung für Brennkraftmaschinen
KR200233504Y1 (ko) 소음기

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 ES GB IT

17P Request for examination filed

Effective date: 19980421

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20001010

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 20010216