FR2840643A1 - Agencement a moteur suralimente facilitant le traitement des gaz d'echappement - Google Patents

Agencement a moteur suralimente facilitant le traitement des gaz d'echappement Download PDF

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Publication number
FR2840643A1
FR2840643A1 FR0206950A FR0206950A FR2840643A1 FR 2840643 A1 FR2840643 A1 FR 2840643A1 FR 0206950 A FR0206950 A FR 0206950A FR 0206950 A FR0206950 A FR 0206950A FR 2840643 A1 FR2840643 A1 FR 2840643A1
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engine
pipe
exhaust
compressor
equipment
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FR2840643B1 (fr
Inventor
Romuald Chaumeaux
Muro David Di
Benoit Thuault
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Renault SAS
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Renault SAS
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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
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/222—Control of additional air supply only, e.g. using by-passes or variable air pump drives using electric valves only
    • 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
    • F01N13/009—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 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • 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 ; Methods of operation or control of catalytic converters
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • 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
    • F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
    • F01N3/225—Electric control of additional air supply
    • 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
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/32—Arrangements for supply of additional air using air pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/16—Control of the pumps by bypassing charging air
    • F02B37/164—Control of the pumps by bypassing charging air the bypassed air being used in an auxiliary apparatus, e.g. in an air turbine
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2290/00—Movable parts or members in exhaust systems for other than for control purposes
    • F01N2290/02—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement
    • F01N2290/04—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement driven by exhaust gases
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

Autour d'un moteur (i) suralimenté d'automobile, une dérivation (12) à vanne (13) réglable contourne le moteur (1) et permet de fournir sans pompe de l'air comprimé par le compresseur (5) au conduit d'échappement (3) pour accomplir un traitement des gaz par un appareillage tel qu'un catalyseur (8) ou un filtre à particules (9).

Description

inferieure.
AGENCEMENT A MOTEUR SURALIMENTE FACILITANT LE
TRAITEMENT DES GAZ D'ECHAPPEMENT
DESCRIPTION
Cette invention a pour sujet un agencement a moteur suralimente dont la propriete essentielle est
de favoriser le traitement des gaz d'echappement.
Les moteurs modernes d'automobiles comprennent un appareillage de traitement de gaz d'echappement qui comprend souvent un filtre a particules dans lequel des suies transportees par les gaz d'echappement vent retenues et periodiquement regenerees. Ce traitement s'effectue a temperature
elevee et necessite une quantite d'oxygene suffisante.
Ces conditions ne vent pas touj ours remplies en pratique, surtout si le vehicule roule surtout en ville, c'est-a-dire generalement a faible charge du moteur et plutot a froid, c'est-a-dire dans des conditions ou la richesse du moteur est augmentee, ce qui fait decroltre la teneur en oxygene des gaz d'echappement. Un apport accru d'oxygene est aussi benefique pour le rendement des catalyseurs
d'echappemement a froid.
Il est connu de realiser un tel apport au catalyseur dans certains vehicules a essence, en aspirant de ltair atmospherique dans un conduit d'alimentation special par une pompe electrique. On doit cependant admettre que cette fa,con de proceder ntest pas avantageuse puisque la pompe est un appareil
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relativement complexe et couteux et qui depense de l'energie. Il est d'ailleurs insuffisant quand la
pression d'echappement est forte.
Une solution meilleure est done proposee avec cette invention. Wile s' applique aux moteurs sural imentes et cons iste a s out i rer une port ion du debit d'air menant au moteur dans une derivation contournant celui- ci et commandee par une vanne a fermeture reglable. L'air ayant ete comprime, il se trouve a une pression suffisante pour s'ecouler dans les gaz d' echappement a l' aval de la turbine. Il n' y a done pas de moyen de pompage de l'air soutire, mais une
simple vanne qui est un moyen plus simple.
Pour resumer, l' invention est relative en general a un agencement a moteur suralimente d'automobile, comprenant un conduit d'admission d'air menant au moteur, un conduit d'echappement de gaz quittant le moteur, un appareillage de traitement des gaz situe sur le conduit d'echappement, et un systeme de suralimentation comprenant un compresseur sur le conduit d'admission, caracterise en ce qu'il comprend un conduit de derivation du moteur, se raccordant au conduit d'admission entre le compresseur et le moteur et au conduit d'echappement de gaz entre le moteur et l'appareillage de traitement, et une vanne a ouverture
reglable placee sur le conduit de deviation.
L'invention s' applique done a ['automobile, aussi bien aux moteurs a essence qu'aux moteurs diesel suralimentes. L'oxygene peut servir aussi bien a la regeneration d'un filtre a particules qu'a l'amorcage
d'un catalyseur.
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L'invention sera maintenant decrite par une de ses realisations au moyen de la figure unique. Un moteur 1 est alimente en air par un conduit d'admission 2 et rejette les gaz d'echappement par un conduit d' echappement 3. Le conduit d' admission 2 comprend classiquement un debitmetre 4 a l' entree, puts, en allant vers le moteur 1, un compresseur 5, un voles 6 a ['admission, et le conduit d'echappement 3 comprend une
turbine 7, un catalyseur 8 et un filtre a particules 9.
Des capteurs de pression et de temperature vent disposes a divers endroits de cette ligne de conduit 2 et 3, ainsi qu'il est bien connu. Le compresseur 5 et la turbine 7 peuvent faire partie d'un turbocompresseur qui exploite la forte pression des gaz d'echappement
pour comprimer l'air s'ecoulant vers le moteur 1.
Sinon, un compresseur mecanique peut etre employe, et la turbine peut etre omise. Enfin, il existe un conduit de recirculation des gaz d'echappement, contournant le moteur 1 et stetendant entre un raccordement au conduit d'echappement 3 entre le moteur 1 et la turbine 7, et un raccordement au conduit d'admission 2 entre le voles 6 et le moteur 1; ce conduit est muni d'une vanne 11 qui, lorsqu'elle est ouverte, permet de faire recirculer une portion du debit des gaz d'echappement
vers le moteur 1.
D'apres l' invention, le moteur 1 est contourne par un conduit de derivation 12 muni d'une vanne reglable 13 commandee par un actionneur 14 en fonction d'une carte 15 sensible notamment, dans cet exemple de realisation, a la temperature regnant juste en amont du filtre a particules 9 et que mesure un
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capteur 16. La carte 15 peut etre sensible a d'autres parametres, et notamment au regime du moteur et au debit du carburant pour ne favoriser l'apport d'oxygene supplementaire dans le conduit d'echappement 3 que quand cela est necessaire. Le conduit de derivation 12 s'etend entre un raccordement au conduit d' admission 2 situe entre le compresseur 5 et le moteur 1, plus precisement entre le compresseur 5 et le voles 6, et un raccordement au conduit d'echappement 3 entre la turbine 7 et l'appareillage de traitement ici compose du catalyseur
8 et du filtre a particules 9.
L' unite de commande electronique du moteur regle ltouverture du voles 6 et de la vanne 13 en fonction des reglages du moteur et du fonctionnement du systeme. On a vu qu'un apport d'oxygene etait benefique
pour le fonctionnement du catalyseur 8 a froid, c'est-
a-dire au demarrage du vehicule. Pour le filtre a particules 9, un apport d'oxygene conduisant a une regeneration des suies qu'il retient peut etre decide quand la perte de charge qu'il occasionne, et qui est obtenue en soustrayant les mesures effectuees par des capteurs de pression en amont et en aval de lui sur le conduit d'echappement 3, atteint un seuil. La carte 15 est alors concue pour fournir l'asservissement correspondent. Il est encore concevable d'utiliser la vanne 13 pour faire varier aussi la quantite d'air parvenant au moteur 1. Cependant, le reglage du fonctionnement du moteur 1 devient plus complexe avec l' invention, ce qui fait qu'on peut preferer de n'utiliser la recirculation des gaz que quand le
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soutirage par le conduit de derivation 12 est inactif, c'est-a-dire de fermer la vanne 11 des que la vanne 13
est ouverte.
Le debit d'air passant par le conduit 12 depend en particulier de la pression de l'air quittant le compresseur 5 et du degre d'ouverture de la vanne 13, ce qui pourra justifier un fonctionnement de cette vanne 13 a n'importe quel etat entre la fermeture et
l'ouverture extreme.
La carte 15 pourra aussi etre sensible au regime du moteur et au debit de carburant. Wile pourra servir a eviter ce qu' on appelle l' emballement de la regeneration, c'est-a-dire une combustion brutale des suies et permettra de reduire la quantite d'oxygene en fonction de la temperature du filtre a particules. Wile pourra enfin etre sensible a un autre capteur 17, mesurant la richesse des gaz d'echappement, pour ajuster le debit d'oxygene fourni aux valeurs favorisant la regeneration. Ledit autre capteur 17 est
place sur le conduit d'echappement 3.
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t 2840643

Claims (5)

REVEND I CAT IONS
1. Agencement a moteur suralimente d'automobile, comprenant un conduit d'admission (2) d'air menant au moteur (1), un conduit d'echappement (7) de gaz quittant le moteur, un appareillage (8,9) de traitement des gaz situe sur le conduit d'echappement, et un systeme de suralimentation comprenant un compresseur (5) sur le conduit d' admission, caracterise en ce qutil comprend un conduit de derivation (12) du moteur, se raccordant au conduit d'admission entre le compresseur (5) et le moteur (1) et au conduit d'echappement entre le moteur (1) et l'appareillage de traitement (8,9), et une vanne a ouverture reglable
(13) placee sur le conduit de derivation.
2. Agencement selon la revendication 1, caracterise en que le conduit de derivation se raccorde au conduit d'admission entre le compresseur et un voles (6).
3. Agencement selon la revendication 1 ou 2, caracterise en ce qu'il comprend un dispositif de
reglage automatique de la vanne.
4. Agencement selon la revendication 3, caracterise en que le dispositif de reglage automatique comprend une carte de reglage (15) admettant comme
entree une temperature de l'appareillage.
5. Agencement selon l'une quelconque des
revendications 3 ou 4, caracterise en ce que le
dispositif de reglage automatique comprend une carte de reglage (15) admettant comme entree une richesse des
FR0206950A 2002-06-06 2002-06-06 Agencement a moteur suralimente facilitant le traitement des gaz d'echappement Expired - Lifetime FR2840643B1 (fr)

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Cited By (8)

* Cited by examiner, † Cited by third party
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WO2005045208A1 (fr) * 2003-10-29 2005-05-19 Robert Bosch Gmbh Procede pour faire fonctionner un moteur a combustion interne
FR2877039A1 (fr) * 2004-10-21 2006-04-28 Renault Sas Procede et systeme de regeneration d'un filtre a particules
FR2879235A1 (fr) * 2004-12-15 2006-06-16 Renault Sas Moteur a combustion interne a recirculation de gaz d'echappement et injection d'air a l'echappement
EP1865169A2 (fr) * 2006-06-08 2007-12-12 Deere & Company Moteur à combustion interne et procédé
FR2907844A1 (fr) * 2006-10-27 2008-05-02 Renault Sas Procede de regeneration passive d'un filtre a particules et moteur a combustion interne associe
WO2009115405A1 (fr) * 2008-03-20 2009-09-24 Robert Bosch Gmbh Procédé pour la régénération d’un filtre à particules diesel d’un moteur à combustion interne ainsi que dispositif correspondant
FR2931514A3 (fr) * 2008-05-22 2009-11-27 Renault Sas Regeneration d'un dispositif de post-traitement de vehicule automobile
CN104405482A (zh) * 2014-10-14 2015-03-11 安徽江淮汽车股份有限公司 排气处理***

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045208A1 (fr) * 2003-10-29 2005-05-19 Robert Bosch Gmbh Procede pour faire fonctionner un moteur a combustion interne
FR2877039A1 (fr) * 2004-10-21 2006-04-28 Renault Sas Procede et systeme de regeneration d'un filtre a particules
FR2879235A1 (fr) * 2004-12-15 2006-06-16 Renault Sas Moteur a combustion interne a recirculation de gaz d'echappement et injection d'air a l'echappement
EP1865169A2 (fr) * 2006-06-08 2007-12-12 Deere & Company Moteur à combustion interne et procédé
EP1865169A3 (fr) * 2006-06-08 2009-04-29 Deere & Company Moteur à combustion interne et procédé
FR2907844A1 (fr) * 2006-10-27 2008-05-02 Renault Sas Procede de regeneration passive d'un filtre a particules et moteur a combustion interne associe
WO2009115405A1 (fr) * 2008-03-20 2009-09-24 Robert Bosch Gmbh Procédé pour la régénération d’un filtre à particules diesel d’un moteur à combustion interne ainsi que dispositif correspondant
FR2931514A3 (fr) * 2008-05-22 2009-11-27 Renault Sas Regeneration d'un dispositif de post-traitement de vehicule automobile
CN104405482A (zh) * 2014-10-14 2015-03-11 安徽江淮汽车股份有限公司 排气处理***
CN104405482B (zh) * 2014-10-14 2017-04-26 安徽江淮汽车集团股份有限公司 排气处理***

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