EP0733157A1 - Systeme d'echappement pour moteurs diesel - Google Patents

Systeme d'echappement pour moteurs diesel

Info

Publication number
EP0733157A1
EP0733157A1 EP95903314A EP95903314A EP0733157A1 EP 0733157 A1 EP0733157 A1 EP 0733157A1 EP 95903314 A EP95903314 A EP 95903314A EP 95903314 A EP95903314 A EP 95903314A EP 0733157 A1 EP0733157 A1 EP 0733157A1
Authority
EP
European Patent Office
Prior art keywords
pipes
exhaust system
inner walls
diesel engine
soot
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.)
Granted
Application number
EP95903314A
Other languages
German (de)
English (en)
Other versions
EP0733157B1 (fr
Inventor
Richard Bauder
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.)
Audi AG
Original Assignee
Audi 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 Audi AG filed Critical Audi AG
Publication of EP0733157A1 publication Critical patent/EP0733157A1/fr
Application granted granted Critical
Publication of EP0733157B1 publication Critical patent/EP0733157B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • F01N13/16—Selection of particular materials
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/084—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases flowing through the silencer two or more times longitudinally in opposite directions, e.g. using parallel or concentric tubes
    • 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
    • F01N13/02—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 silencers 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
    • F01N2230/00—Combination of silencers and other devices
    • F01N2230/04—Catalytic converters
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/08—Surface coverings for corrosion prevention
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an exhaust system for a diesel internal combustion engine according to the preamble of claim 1.
  • the object of the invention is to provide an exhaust system of the generic type, in which the particle accumulation in part-load operation is reduced considerably with little effort and, consequently, the soot surge during the subsequent acceleration is considerably reduced.
  • At least the inner walls of the connecting pipes and the pipes in the reflection silencer have a maximum roughness of 1 ⁇ m. It has been shown that with such pipes, the inner surface of which has a roughness depth which is only about 20% of the roughness depth of conventional exhaust pipes, the particle accumulation is considerably reduced, namely by up to 60%, which is has a corresponding reduction in the soot impact.
  • the low roughness depth is preferably achieved by coating the inner walls of the pipes, for example by B. by coating with aluminum, or by enamelling, can be realized with the roughness depth of 0.5 ⁇ m.
  • the enamelling of the inner surfaces of the tubes has the further advantage that the inner surfaces of the tubes are then electrically non-conductive, so that no electrostatic charge can occur which could favor the adherence of particles.
  • an exhaust system of a diesel internal combustion engine 1 is schematically shown, on the outlet manifold 2 of which a front pipe 3 is flanged, which is connected to an oxidation catalytic converter 4, to which a reflection pre-silencer 6 is connected by a first intermediate pipe 5, which is in turn connected to a main reflection silencer 8 by a second connecting pipe 7.
  • a front pipe 3 is flanged, which is connected to an oxidation catalytic converter 4
  • a reflection pre-silencer 6 is connected by a first intermediate pipe 5, which is in turn connected to a main reflection silencer 8 by a second connecting pipe 7.
  • the inner walls of the tubes 3, 5, 7 and 9 and the tubes 10, 11, 12 in the mufflers 6 and 8 have a maximum roughness of 1 ⁇ m, which is achieved in particular by an aluminum coating or enamelling.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

Un système d'échappement pour un moteur Diesel comprend un catalyseur (4) et au moins un silencieux à chicanes (6, 8) reliés l'un à l'autre et au moteur (1) par des tuyaux (3, 5, 6). Les parois intérieures des tuyaux de liaison et des tuyaux (10, 11, 12) situés dans le silencieux à chicanes présentent une rugosité d'au maximum 1 νm, obtenue par exemple par enduction des parois intérieures avec de l'aluminium ou par émaillage. L'accumulation de particules pendant le fonctionnement sous une charge partielle et l'émission de fumée pendant l'accélération qui s'ensuit sont ainsi considérablement réduites.
EP95903314A 1993-12-09 1994-12-02 Systeme d'echappement pour moteurs diesel Expired - Lifetime EP0733157B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9318921U DE9318921U1 (de) 1993-12-09 1993-12-09 Auspuffanlage für eine Diesel-Brennkraftmaschine
DE9318921U 1993-12-09
PCT/EP1994/004014 WO1995016111A1 (fr) 1993-12-09 1994-12-02 Systeme d'echappement pour moteurs diesel

Publications (2)

Publication Number Publication Date
EP0733157A1 true EP0733157A1 (fr) 1996-09-25
EP0733157B1 EP0733157B1 (fr) 1998-06-17

Family

ID=6901775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95903314A Expired - Lifetime EP0733157B1 (fr) 1993-12-09 1994-12-02 Systeme d'echappement pour moteurs diesel

Country Status (3)

Country Link
EP (1) EP0733157B1 (fr)
DE (2) DE9318921U1 (fr)
WO (1) WO1995016111A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2742802B1 (fr) * 1995-12-20 1998-01-30 Lorraine Laminage Pot d'echappement de vehicule automobile
JP2001330394A (ja) * 2000-05-22 2001-11-30 Denso Corp 排気熱交換器
FR2811015B1 (fr) * 2000-06-30 2003-02-21 Ecia Equip Composants Ind Auto Volume d'echappement et dispositif d'echappement le comportant
DE202007012019U1 (de) 2007-08-28 2008-02-21 Penzkofer, Klaus Abgassystem für Kraftfahrzeuge mit Verbrennungsmotoren

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT355878B (de) * 1975-05-30 1980-03-25 Vmw Ranshofen Berndorf Ag Auspuffanlage
DE2962334D1 (en) * 1978-07-07 1982-04-29 Reimbold & Strick Enamelled sound absorber and method for its enamelling
DE2917586C2 (de) * 1979-04-30 1982-11-18 Werner Dr.-Ing. 8450 Amberg Baumann Auspufftopf aus emailliertem Stahlblech
DE3015907A1 (de) * 1980-04-24 1981-10-29 Werner Dr.-Ing. 8450 Amberg Baumann Auspufftopf aus emailliertem stahlblech und verfahren zu seiner herstellung
DE3638807A1 (de) * 1986-11-17 1988-05-19 Westfalia Email Gusseisenabgaskruemmer fuer zylinderbrennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9516111A1 *

Also Published As

Publication number Publication date
DE59406293D1 (de) 1998-07-23
EP0733157B1 (fr) 1998-06-17
DE9318921U1 (de) 1994-02-03
WO1995016111A1 (fr) 1995-06-15

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