WO2009118746A1 - Exhaust system for vehicles and its mounting arrangement thereof - Google Patents

Exhaust system for vehicles and its mounting arrangement thereof Download PDF

Info

Publication number
WO2009118746A1
WO2009118746A1 PCT/IN2008/000549 IN2008000549W WO2009118746A1 WO 2009118746 A1 WO2009118746 A1 WO 2009118746A1 IN 2008000549 W IN2008000549 W IN 2008000549W WO 2009118746 A1 WO2009118746 A1 WO 2009118746A1
Authority
WO
WIPO (PCT)
Prior art keywords
catalytic converter
vehicles
exhaust system
mounting
silencer assembly
Prior art date
Application number
PCT/IN2008/000549
Other languages
French (fr)
Inventor
Vishwas Deshpande
Subodh Sawant
Original Assignee
Tata Motors Limited
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 Tata Motors Limited filed Critical Tata Motors Limited
Publication of WO2009118746A1 publication Critical patent/WO2009118746A1/en

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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1838—Construction facilitating manufacture, assembly, or disassembly characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles
    • F01N13/1844—Mechanical joints
    • F01N13/1855—Mechanical joints the connection being realised by using bolts, screws, rivets or the like

Definitions

  • This invention relates to exhaust system for vehicles in general and more particularly to silencer unit used in exhaust system and mounting of exhaust system on vehicles.
  • the conventional exhaust system of a vehicle mainly consists of exhaust manifold, catalytic converter, flexible bellow, intermediate pipe, silencer assembly and tail pipe.
  • one end of said exhaust manifold is connected to engine manifold and other end is connected to catalytic converter.
  • Other end of said catalytic converter is connected to silencer assembly through said flexible bellow and intermediate pipe.
  • Said intermediate pipe is supported on underbody through one or more rubber hangers.
  • Said silencer assembly is also mounted on underbody through one or more rubber hangers. Outlet of said silencer assembly is connected to tail pipe.
  • the main object of this invention is to provide exhaust system for vehicles and its rigid mounting arrangement without any transfer of vibrations to cabin.
  • Another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement with silencer assembly made in two halves.
  • Yet another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement with silencer assembly having ribs on its shells.
  • Yet another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement, which is simple in construction and cost effective.
  • Exhaust system for vehicles and its mounting arrangement in accordance with this invention basically comprises of exhaust manifold, catalytic converter, mounting means for catalytic converter, intermediate pipe, silencer assembly, mounting means for silencer assembly and tail pipe.
  • one end of said exhaust manifold is connected to engine manifold and other end is connected to catalytic converter.
  • Second end of said catalytic converter is supported on power train through its mounting means.
  • Said mounting means of catalytic converter assist in holding and mounting said catalytic converter in required position without inducing any stress on it.
  • Said second end of catalytic converter is connected to silencer assembly through intermediate pipe.
  • Said silencer assembly is mounted on said power train through its mounting means.
  • Said mounting means of silencer assembly assists in holding and mounting said silencer assembly in required position without inducing any stress on it.
  • Outlet of said silencer assembly is connected to tail pipe.
  • Internal construction of silencer consists of perforated tubes and baffles for the expansion of exhaust gases.
  • FIG.1 shows isometric view of the Exhaust system for vehicles in accordance with this invention.
  • FIG.2 shows front view of the Exhaust system for vehicles in accordance with this invention.
  • FIG. 3(a) and (b) shows two halves of a silencer assembly
  • FIG. 3(c) shows silencer assembly used in this invention
  • FIG. 3(d) shows sectional view of silencer assembly taken at D-D from fig.3(c)
  • FIG. 3(e) shows enlarged view of features of shells of said silencer assembly
  • FIG. 4(a) shows catalytic converter end part of mounting means of catalytic converter.
  • FIG. 4(b) shows power train end part of mounting means of catalytic converter.
  • FIG. 5 shows mounting means for catalytic converter
  • FIG. 6 (a) shows silencer end part of mounting means of silencer.
  • FIG. 6 (b) shows power train end part of mounting means of silencer.
  • FIG. 7 shows mounting means for silencer.
  • Exhaust system for vehicles and its rigid mounting arrangement in accordance with this invention comprises of exhaust manifold (1), catalytic converter (2), mounting means (16) for catalytic converter, intermediate pipe (5), silencer assembly (6), and mounting means (17) for silencer assembly and tail pipe (9).
  • one end of said exhaust manifold (1) is connected to engine manifold (not shown) and other end is connected to catalytic converter (2).
  • Second end of said catalytic converter (2) is supported on power train (18) through its mounting means (16).
  • Said mounting means (16) of catalytic converter comprises of two L shaped brackets, one bracket (3) for catalytic converter end and other bracket (4) for power train end.
  • Said brackets (3, 4) are adjustably fastened together through slots (19,20).
  • Said bracket (3) is fastened to Second end of said catalytic converter (2) and said bracket (4) is fastened to power train (18).
  • Said brackets (3, 4) are provided with slots (19, 20) to provided desirable adjustment during assembling.
  • Mounting means (16) of catalytic converter assist in holding and mounting said catalytic converter (2) in required position without inducing any stress on it.
  • Said brackets (3,4) are provided with stiffener (23,24) respectively to improve their strength.
  • Said second end of catalytic converter (2) is connected to silencer assembly (6) through intermediate pipe (5).
  • Said silencer assembly (6) is mounted on said power train (18) through its mounting means (17).
  • Said mounting means of silencer comprise of Y shaped bracket (7) and flange mounting bracket (8).
  • Said silencer assembly (6) is made in two halves (10, 11).
  • Said half (i ⁇ ) is having outer shell (12) and inner shell (13).
  • Said half (11) is having outer shell (14) and inner shell (15).
  • Said outer and inner shells (12, 14 and 13, 15) are provided with plurality of ribs in order to improve stiffness.
  • Said two halves (10, 11) are joined together, preferably by means of seam welding.
  • Said outer and inner shells (12, 14 and 13, 15) are made of same material or different material in order to improved thermal performance at hotter inner end.
  • Internal construction of silencer consists of perforated tubes and baffle walls for the expansion of exhaust gases.
  • Said Y shaped bracket (7) is suitably flanged to improve its strength and it is welded to said silencer (6).
  • Said 'Y' shaped bracket (7) is provided with this particular shape to give positive support to said silencer.
  • Said bracket (7) is adjustably fastened to flanged shaped bracket (8) through slots (21, 22).
  • Said flanged shaped bracket (8) is mounted on power train through fasteners.
  • Said mounting means (17) of silencer assembly (6) assist in holding and mounting said silencer assembly in required position without inducing any stress on it.
  • the outlet of said silencer (6) is connected to said tailpipe (9) and is opened to atmosphere to exit the exhaust gases.
  • the silencer mounting means are not directly connected to the underbody of the vehicle therefore assist in preventing the transfer of vibrations from exhaust system to the passenger cabin.
  • the ribbing patterns provided on shells of the silencer increase the stiffness of the silencer thereby shifting the natural frequency of the silencer system away from the exciting frequencies of the engine to avoid resonance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

The invention relates to a exhaust system for vehicles and its mounting arrangement comprising of exhaust manifold (1); catalytic converter (2), mounting means (16) for catalytic converter (2); intermediate pipe (5), silencer assembly (6), mounting means (17) for silencer assembly and tail pipe (9), wherein one end of said exhaust manifold (1) is connected to engine manifold and other end is connected to first end of catalytic converter (2), second end of said catalytic converter (2) is supported on power train through its mounting means (16), said second end of catalytic converter (2) is connected to silencer assembly (6) through intermediate piper (5); said silencer assembly (6) is mounted on said power train through its mounting means (17), outlet of said silencer assembly is connected to tail pipe (9) which is open to atmosphere.

Description

EXHAUST SYSTEM FOR VEHICLES AND ITS MOUNTING ARRANGEMENT THEREOF
FIELD OF INVENTION
This invention relates to exhaust system for vehicles in general and more particularly to silencer unit used in exhaust system and mounting of exhaust system on vehicles.
BACKGROUND OF INVENTION
Normally exhaust systems are used in vehicles to maintain the desired exhaust emission level and exhaust noise level as per norms.
The conventional exhaust system of a vehicle mainly consists of exhaust manifold, catalytic converter, flexible bellow, intermediate pipe, silencer assembly and tail pipe. Wherein one end of said exhaust manifold is connected to engine manifold and other end is connected to catalytic converter. Other end of said catalytic converter is connected to silencer assembly through said flexible bellow and intermediate pipe. Said intermediate pipe is supported on underbody through one or more rubber hangers. Said silencer assembly is also mounted on underbody through one or more rubber hangers. Outlet of said silencer assembly is connected to tail pipe.
The drawback associated with said conventional exhaust system is that, this requires flexible element as one of the important component, which is prone to frequent failure. As silencer assembly is directly mounted to vehicle under body the vibrations are directly transferred to the passengers as complete elimination of transfer of vibrations is not possible. OBJECTS OF INVENTION
The main object of this invention is to provide exhaust system for vehicles and its rigid mounting arrangement without any transfer of vibrations to cabin. Another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement with silencer assembly made in two halves.
Yet another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement with silencer assembly having ribs on its shells.
Yet another object of this invention is to provide Exhaust system for vehicles and its rigid mounting arrangement, which is simple in construction and cost effective.
BRIEF DESCRIPTION OF INVENTION
Exhaust system for vehicles and its mounting arrangement in accordance with this invention basically comprises of exhaust manifold, catalytic converter, mounting means for catalytic converter, intermediate pipe, silencer assembly, mounting means for silencer assembly and tail pipe. Wherein one end of said exhaust manifold is connected to engine manifold and other end is connected to catalytic converter. Second end of said catalytic converter is supported on power train through its mounting means. Said mounting means of catalytic converter assist in holding and mounting said catalytic converter in required position without inducing any stress on it. Said second end of catalytic converter is connected to silencer assembly through intermediate pipe. Said silencer assembly is mounted on said power train through its mounting means.
Said mounting means of silencer assembly assists in holding and mounting said silencer assembly in required position without inducing any stress on it. Outlet of said silencer assembly is connected to tail pipe. Internal construction of silencer consists of perforated tubes and baffles for the expansion of exhaust gases.
BRIEF DESCRIPTION OF DRAWINGS
FIG.1 shows isometric view of the Exhaust system for vehicles in accordance with this invention.
FIG.2 shows front view of the Exhaust system for vehicles in accordance with this invention.
FIG. 3(a) and (b) shows two halves of a silencer assembly
FIG. 3(c) shows silencer assembly used in this invention
FIG. 3(d) shows sectional view of silencer assembly taken at D-D from fig.3(c)
FIG. 3(e) shows enlarged view of features of shells of said silencer assembly
FIG. 4(a) shows catalytic converter end part of mounting means of catalytic converter.
FIG. 4(b) shows power train end part of mounting means of catalytic converter.
FIG. 5 shows mounting means for catalytic converter
FIG. 6 (a) shows silencer end part of mounting means of silencer.
FIG. 6 (b) shows power train end part of mounting means of silencer.
FIG. 7 shows mounting means for silencer.
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same.
Referring to figs. 1 to 7,
Exhaust system for vehicles and its rigid mounting arrangement in accordance with this invention comprises of exhaust manifold (1), catalytic converter (2), mounting means (16) for catalytic converter, intermediate pipe (5), silencer assembly (6), and mounting means (17) for silencer assembly and tail pipe (9). Wherein one end of said exhaust manifold (1) is connected to engine manifold (not shown) and other end is connected to catalytic converter (2). Second end of said catalytic converter (2) is supported on power train (18) through its mounting means (16). Said mounting means (16) of catalytic converter comprises of two L shaped brackets, one bracket (3) for catalytic converter end and other bracket (4) for power train end. Said brackets (3, 4) are adjustably fastened together through slots (19,20). Said bracket (3) is fastened to Second end of said catalytic converter (2) and said bracket (4) is fastened to power train (18). Said brackets (3, 4) are provided with slots (19, 20) to provided desirable adjustment during assembling. Mounting means (16) of catalytic converter assist in holding and mounting said catalytic converter (2) in required position without inducing any stress on it. Said brackets (3,4) are provided with stiffener (23,24) respectively to improve their strength.
Said second end of catalytic converter (2) is connected to silencer assembly (6) through intermediate pipe (5). Said silencer assembly (6) is mounted on said power train (18) through its mounting means (17). Said mounting means of silencer comprise of Y shaped bracket (7) and flange mounting bracket (8). Said silencer assembly (6) is made in two halves (10, 11). Said half (iθ) is having outer shell (12) and inner shell (13). Said half (11) is having outer shell (14) and inner shell (15). Said outer and inner shells (12, 14 and 13, 15) are provided with plurality of ribs in order to improve stiffness. Said two halves (10, 11) are joined together, preferably by means of seam welding. Said outer and inner shells (12, 14 and 13, 15) are made of same material or different material in order to improved thermal performance at hotter inner end. Internal construction of silencer consists of perforated tubes and baffle walls for the expansion of exhaust gases. Said Y shaped bracket (7) is suitably flanged to improve its strength and it is welded to said silencer (6).Said 'Y' shaped bracket (7) is provided with this particular shape to give positive support to said silencer. Said bracket (7) is adjustably fastened to flanged shaped bracket (8) through slots (21, 22). Said flanged shaped bracket (8) is mounted on power train through fasteners. Said mounting means (17) of silencer assembly (6) assist in holding and mounting said silencer assembly in required position without inducing any stress on it.
The outlet of said silencer (6) is connected to said tailpipe (9) and is opened to atmosphere to exit the exhaust gases.
Thus the silencer mounting means are not directly connected to the underbody of the vehicle therefore assist in preventing the transfer of vibrations from exhaust system to the passenger cabin. The ribbing patterns provided on shells of the silencer increase the stiffness of the silencer thereby shifting the natural frequency of the silencer system away from the exciting frequencies of the engine to avoid resonance.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

Claims

1. Exhaust system for vehicles and its mounting arrangement comprising of exhaust manifold, catalytic converter, mounting means for catalytic converter, intermediate pipe, silencer assembly, mounting means for silencer assembly and tail pipe, wherein one end of said exhaust manifold is connected to engine manifold and other end is connected to first end of catalytic converter, second end of said catalytic converter is supported on power train through its mounting means, said second end of catalytic converter is connected to silencer assembly through intermediate pipe, said silencer assembly is mounted on said power train through its mounting means, outlet of said silencer assembly is connected to tail pipe which is open to atmosphere.
2. Exhaust system for vehicles and its mounting arrangement as claimed in claim 1, wherein said silencer assembly is made in two halves and said halves are joined together at ends.
3. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 and 2, wherein each halves of said silencer assembly is having outer shell and inner shell.
4. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 3, wherein said outer and inner shells are made with same or different materials and are provided with plurality of ribs.
5. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 4, wherein said mounting means for catalytic converter comprises of two L shaped brackets and are adjustably fastened together.
6. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 5, wherein said catalytic converter is supported on power train by mounting one bracket on said catalytic converter and other on said power train.
7. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 6, wherein said mounting means for silencer assembly comprise of Y - shaped bracket and flange mounting bracket and are adjustably fastened together.
8. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 7, wherein said Y shaped bracket is suitably flanged to improve its strength and it is welded to said silencer.
9. Exhaust system for vehicles and its mounting arrangement as claimed in claims 1 to 8, wherein said silencer assembly is supported on power train by mounting Y shaped bracket on said silencer assembly and flange mounting bracket on said power train.
10. Exhaust system for vehicles and its mounting arrangement substantially as herein described with reference to accompanying drawings.
PCT/IN2008/000549 2008-03-27 2008-08-29 Exhaust system for vehicles and its mounting arrangement thereof WO2009118746A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN660/MUM/2008 2008-03-27
IN660MU2008 2008-03-27

Publications (1)

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WO2009118746A1 true WO2009118746A1 (en) 2009-10-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012170143A2 (en) * 2011-06-07 2012-12-13 Tenneco Automotive Operating Company Inc. Leaf spring bracket
US10436099B2 (en) 2017-04-06 2019-10-08 Tenneco Automotive Operating Company Inc. Exhaust conduit hanger

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0598959A (en) * 1991-10-07 1993-04-20 Honda Motor Co Ltd Exhaust device mounting structure for motorcycle
JPH0726998A (en) * 1993-07-05 1995-01-27 Nissan Motor Co Ltd Exhaust gas measuring sensor arranging structure
JPH09310614A (en) * 1996-05-20 1997-12-02 Calsonic Corp Catalytic converter
US20070262222A1 (en) * 2006-05-10 2007-11-15 Andreas Steigert Devices for fastening an exhaust manifold to an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0598959A (en) * 1991-10-07 1993-04-20 Honda Motor Co Ltd Exhaust device mounting structure for motorcycle
JPH0726998A (en) * 1993-07-05 1995-01-27 Nissan Motor Co Ltd Exhaust gas measuring sensor arranging structure
JPH09310614A (en) * 1996-05-20 1997-12-02 Calsonic Corp Catalytic converter
US20070262222A1 (en) * 2006-05-10 2007-11-15 Andreas Steigert Devices for fastening an exhaust manifold to an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012170143A2 (en) * 2011-06-07 2012-12-13 Tenneco Automotive Operating Company Inc. Leaf spring bracket
WO2012170143A3 (en) * 2011-06-07 2013-03-14 Tenneco Automotive Operating Company Inc. Leaf spring bracket
US8690115B2 (en) 2011-06-07 2014-04-08 Tenneco Automotive Operating Company Inc. Leaf spring bracket
US10436099B2 (en) 2017-04-06 2019-10-08 Tenneco Automotive Operating Company Inc. Exhaust conduit hanger

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