WO1991007575A1 - Systeme d'echappement - Google Patents

Systeme d'echappement Download PDF

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Publication number
WO1991007575A1
WO1991007575A1 PCT/GB1990/001714 GB9001714W WO9107575A1 WO 1991007575 A1 WO1991007575 A1 WO 1991007575A1 GB 9001714 W GB9001714 W GB 9001714W WO 9107575 A1 WO9107575 A1 WO 9107575A1
Authority
WO
WIPO (PCT)
Prior art keywords
converter
branches
manifold
exhaust
exhaust system
Prior art date
Application number
PCT/GB1990/001714
Other languages
English (en)
Inventor
Barry John Gale
Michael John Southwell
Original Assignee
Ford Motor Company Limited
Ford Werke Ag
Ford France S.A.
Ford Motor Company Of Canada Limited
Ford Motor Company
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 Ford Motor Company Limited, Ford Werke Ag, Ford France S.A., Ford Motor Company Of Canada Limited, Ford Motor Company filed Critical Ford Motor Company Limited
Publication of WO1991007575A1 publication Critical patent/WO1991007575A1/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

Definitions

  • the present invention relates to an exhaust system incorporating a catalytic converter.
  • the invention seeks to provided an exhaust system in which two or more branches of a manifold share a common catalytic converter but in which converter lies within the tunes lengths of the branches.
  • an exhaust system having a plurality of branches leading to different engine cylinders or groups of engine cylinders and a single catalytic converter connected to the pluralxuy branches, characterised in that the connection between the branches of the manifold and the converter is such that gases from the different branches of the manifold do not mix with one another prior to entering the converter nor during their passage through the converter.
  • a catalytic converter typically comprises a ceramic or metallic core in the form of a honeycomb structure which has axial passages for the exhaust gases. If such a core is positioned in the housing of the converter such that the inlet and outlet pipes abut, or terminate very close to, the core, then gases from the individual branches of the manifold can pass through the converter without mixing. The length of the branches of the manifold both upstreairt and downstream of the catalytic converter can now be tur ed since the gases within the converter form part of the tuned gas columns.
  • the tuning of the exhaust manifold is now divorced from the positioning of the converter and it is preferred to connect the catalytic converter between the exhaust manifold and the exhaust down pipe.
  • the converter can then be mounted directly onto the exhaust manifold, which is desirable having regard to its weight. Furthermore, the operation of the converter is improved as the exhaust gases will be hotter while passing through the converter.
  • the flange 10 in the drawing is intended to be fitted directly to the exhaust manifold (not shown) of a four cylinder internal combustion.
  • the manifold has two separate outlet conduits each leading to a pair of cylinders.
  • the pairs of cylinders which are joined to one another in the manifold operate out of phase and therefore do not interfere with one another in so far as concerns the tuning of their manifold branches.
  • the conduits are semi-circular, or D-shaped, in cross section and when placed back to back form a complete circle divided into two by a partition wall extending along a diameter of the circle.
  • the flange 10 can be part of a flexible ball joint to be sealed against the circumference of the exhaust manifold by a collar having a part-spherical surface which can seal against a part-spherical seat under the action of a compression spring.
  • This flexible joint is described in more detail in British Patent Application No. 8925842.0 filed on 15 November, 1989. The purpose of the flexible joint is to accommodate rocking of the engine.
  • the converter 12 has a cylindrical housing 16 and a cylindrical honeycomb structure or core 14.
  • a partition wall 18 extends along a diameter and is aligned with the partition between the two conduits of the exhaust manifold.
  • the partition wall 18 contacts the core 14 so that the gases from the individual branches of the manifold do not mix prior to passage through the core 14. Having regard to the manner in which such cores 14 are constructed, the gases pass through them without mixing.
  • the housing includes a similar partition wall 20 so that gases do not mix before entering the two down pipes.
  • the down pipes 22 and 24 are joined to one another at a plenum 26 and the length of the pipes 22 and 24 from the converter 12 to the plenum 26 forms the tuned length of the manifold branches and is selected to optimise performance.
  • the preferred embodiment of the invention provides a simple, inexpensive and robust- solution to the positioning and mounting of a catalytic converter which affords considerable freedom in the design of the exhaust system with a view to optimising engine performance by improving engine scavenging.

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)
  • Exhaust Silencers (AREA)

Abstract

Le système d'échappement décrit comprend plusieurs branches conduisant à différents cylindres du moteur ou à différents groupes de cylindres du moteur, ainsi qu'un convertisseur catalytique unique (12) relié à la pluralité des branches, de sorte que les gaz provenant des différentes branches du collecteur ne se mélangent pas entre eux avant d'entrer dans le convertisseur ou pendant leur passage à travers le convertisseur.
PCT/GB1990/001714 1989-11-15 1990-11-08 Systeme d'echappement WO1991007575A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8925839A GB2238004A (en) 1989-11-15 1989-11-15 Exhaust system.
GB8925839.6 1989-11-15

Publications (1)

Publication Number Publication Date
WO1991007575A1 true WO1991007575A1 (fr) 1991-05-30

Family

ID=10666360

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/001714 WO1991007575A1 (fr) 1989-11-15 1990-11-08 Systeme d'echappement

Country Status (2)

Country Link
GB (1) GB2238004A (fr)
WO (1) WO1991007575A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1726798A3 (fr) * 2005-05-25 2007-04-25 Yamaha Hatsudoki Kabushiki Kaisha Système d'échappement, dispositif pour moteur et véhicule l'utilisant
EP1892397A1 (fr) * 2006-08-24 2008-02-27 Ford Global Technologies, LLC Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5758493A (en) * 1996-12-13 1998-06-02 Ford Global Technologies, Inc. Method and apparatus for desulfating a NOx trap
US5979159A (en) * 1998-03-16 1999-11-09 Ford Global Technologies, Inc. Exhaust after-treatment system for automotive vehicle
JP2005118700A (ja) * 2003-10-17 2005-05-12 Ngk Insulators Ltd ハニカム構造体、及び触媒コンバータ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53137326A (en) * 1977-05-06 1978-11-30 Toyota Motor Corp Catalytic converter
DE2725943A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Katalysator
US4261170A (en) * 1977-09-26 1981-04-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust-gas purifier
JPS6412017A (en) * 1987-07-07 1989-01-17 Toyota Motor Corp Catalytic converter for dual exhaust system
FR2621955A1 (fr) * 1987-10-19 1989-04-21 Thomas Didier Echappement a longueur variable pour moteur a combustion interne deux temps

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2322057A1 (de) * 1973-05-02 1974-11-21 Porsche Ag Vorrichtung zum katalytischen nachverbrennen von abgasen einer mehrzylindrigen brennkraftmaschine
US4663934A (en) * 1985-04-01 1987-05-12 Arvin Industries, Inc. Manifold exhaust processor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53137326A (en) * 1977-05-06 1978-11-30 Toyota Motor Corp Catalytic converter
DE2725943A1 (de) * 1977-06-08 1978-12-21 Daimler Benz Ag Katalysator
US4261170A (en) * 1977-09-26 1981-04-14 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Exhaust-gas purifier
JPS6412017A (en) * 1987-07-07 1989-01-17 Toyota Motor Corp Catalytic converter for dual exhaust system
FR2621955A1 (fr) * 1987-10-19 1989-04-21 Thomas Didier Echappement a longueur variable pour moteur a combustion interne deux temps

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 183 (M-820)(3531) 28 April 1989, & JP-A-01 12017 (TOYOTA) 17 January 1989, see the whole document *
PATENT ABSTRACTS OF JAPAN vol. 3, no. 12 (M-47)() 31 January 1979, & JP-A-53 137326 (TOYOTA) 30 November 1978, see the whole document *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1726798A3 (fr) * 2005-05-25 2007-04-25 Yamaha Hatsudoki Kabushiki Kaisha Système d'échappement, dispositif pour moteur et véhicule l'utilisant
US7418818B2 (en) 2005-05-25 2008-09-02 Yamaha Hatsudoki Kabushiki Kaisha Exhaust system, and engine device and vehicle with the same
EP1892397A1 (fr) * 2006-08-24 2008-02-27 Ford Global Technologies, LLC Moteur à combustion interne à au moins deux cylindres et un système de post-traitement des gaz d'échappement

Also Published As

Publication number Publication date
GB2238004A (en) 1991-05-22
GB8925839D0 (en) 1990-01-04

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