CA2448648C - Reverse flow catalytic muffler - Google Patents
Reverse flow catalytic muffler Download PDFInfo
- Publication number
- CA2448648C CA2448648C CA002448648A CA2448648A CA2448648C CA 2448648 C CA2448648 C CA 2448648C CA 002448648 A CA002448648 A CA 002448648A CA 2448648 A CA2448648 A CA 2448648A CA 2448648 C CA2448648 C CA 2448648C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- chamber
- catalytic muffler
- reactor bed
- inlet
- 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.)
- Expired - Fee Related
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
- F01N13/1888—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells
- F01N13/1894—Construction facilitating manufacture, assembly, or disassembly the housing of the assembly consisting of two or more parts, e.g. two half-shells the parts being assembled in longitudinal direction
-
- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
-
- 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
- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
- F01N3/2885—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices with exhaust silencers in a single housing
-
- 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
- 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
- F01N13/002—Apparatus adapted for particular uses, e.g. for portable devices driven by machines or engines
-
- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/06—Ceramic, e.g. monoliths
-
- 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 gas passages, pipes or tubes
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- 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 gas passages, pipes or tubes
- F01N2470/22—Inlet and outlet tubes being positioned on the same side of the apparatus
-
- 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
- F01N2490/00—Structure, disposition or shape of gas-chambers
- F01N2490/02—Two or more expansion chambers in series connected by means of tubes
- F01N2490/06—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet in opposite directions
-
- 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
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/06—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for hand-held tools or portables devices
Abstract
A catalytic muffler having a housing with a first chamber and a second chamb er fluidly communicating through a catalyst bed interspersed there between. A first baffle assembly in the first chamber extends between the catalyst bed and the housing. An inlet passage extends through the housing into the first chamber. An outlet passage extends through the housing into one of the first and second chambers. A second baffle assembly in the second chamber extends between the catalyst bed and the housing. The first and second baffle assemblies act in conjunction with the housing and the reactor bed to define a flow passage through the housing from the inlet passage through at least thr ee discreet zones of the reactor bed to the outlet passage.
Description
TITLE: REVERSE FLOW CATALYTIC MUFFLER
FIELD OF THE INVENTION
This invention relates generally to engine exhaust handling apparatus, and more particularly, to apparatus for noise abatement and catalytic treatment of internal combustion engine exhaust gasses.
BACKGROUND OF THE INVENTION
In the burning of petroleum fuels in an internal combustion engine, hydrocarbons in the fuel and nitrogen and oxygen from the air used to combust the fuel combine to yield various oxides and nitrides, principally comprising carbon monoxide, carbon dioxide, nitrous oxide and nitric oxide. Waste materials in the fuel, such as sulphur produce other oxides such as sulphur dioxide.
Additionally, some of the fuel passes into the exhaust partially combusted or uncombusted.
Often the particular oxides are more harmful to human beings than other oxides of the same elements. For example carbon dioxide may pose less of a hazard than carbon monoxide. In order to minimize the more harmful emissions, most larger internal combustion engines, particularly those used in automobiles are equipped with exhaust gas catalysts in their exhaust systems ("catalytic converters") to convert less desirable oxides to more desirable oxides.
Automobiles generally have a fair amount of space available for both a catalytic converter and for noise abatement apparatus such as a muffler and a resonator to suppress the noise ordinarily associated with internal combustion engine operation.
Smaller engines in applications such as lawnmowers are significant generators of pollutants but in the past have seldom if ever been equipped with exhaust treatment apparatus, despite that for their size they often generate proportionately more harmful emissions. A reason for this may be the lack of expensive and sophisticated engine management systems found in more expensive applications such as automobiles.
It is an object of the present invention to provide a catalytic muffler of compact dimensions which is easily accommodated in small displacement internal combustion engine applications.
It is a further object of the present invention to provide such a compact catalytic muffler which also has noise attenuation capabilities to obviate the need for a separate muffler.
It is also an object of the present invention to provide a noise abating catalytic muffler design for small engine applications which is simple and comparatively inexpensive to produce and which lends itself readily both to O.E.M. and retrofit applications.
SUMMARY OF THE INVENTION
A catalytic muffler having a housing with a first chamber and a second chamber fluidly communicating through a catalyst bed interspersed there between. A first baffle assembly in the first chamber extends between the catalyst bed and the housing. An inlet passage extends through the housing into the first chamber.
An outlet passage extends through the housing into one of the first and second chambers. A second baffle assembly in the second chamber extends between the catalyst bed and the housing. The first and second baffle assemblies act in conjunction with the housing and the reactor bed to define a flow passage through the housing from the inlet passage through at least three discrete zones of the reactor bed to the outlet passage.
The inlet and outlet passages may extend through the first chamber, either through an end of the first chamber or a side of the first chamber as desired. Alternatively, the inlet passage may extend into the first chamber and the outlet passage may extend into the second chamber.
The reactor bed may include an oxidizing catalyst in one part thereof and a reducing catalyst in another part thereof.
The reducing catalyst may be upstream of the oxidizing catalyst.
The housing may be cylindrical.
DESCRIPTION OF DRAWINGS
Preferred embodiments of the invention are described in detail below with reference to the accompanying figures in which:
Figure 1 is perspective view of a catalytic muffler according to the present invention;
FIELD OF THE INVENTION
This invention relates generally to engine exhaust handling apparatus, and more particularly, to apparatus for noise abatement and catalytic treatment of internal combustion engine exhaust gasses.
BACKGROUND OF THE INVENTION
In the burning of petroleum fuels in an internal combustion engine, hydrocarbons in the fuel and nitrogen and oxygen from the air used to combust the fuel combine to yield various oxides and nitrides, principally comprising carbon monoxide, carbon dioxide, nitrous oxide and nitric oxide. Waste materials in the fuel, such as sulphur produce other oxides such as sulphur dioxide.
Additionally, some of the fuel passes into the exhaust partially combusted or uncombusted.
Often the particular oxides are more harmful to human beings than other oxides of the same elements. For example carbon dioxide may pose less of a hazard than carbon monoxide. In order to minimize the more harmful emissions, most larger internal combustion engines, particularly those used in automobiles are equipped with exhaust gas catalysts in their exhaust systems ("catalytic converters") to convert less desirable oxides to more desirable oxides.
Automobiles generally have a fair amount of space available for both a catalytic converter and for noise abatement apparatus such as a muffler and a resonator to suppress the noise ordinarily associated with internal combustion engine operation.
Smaller engines in applications such as lawnmowers are significant generators of pollutants but in the past have seldom if ever been equipped with exhaust treatment apparatus, despite that for their size they often generate proportionately more harmful emissions. A reason for this may be the lack of expensive and sophisticated engine management systems found in more expensive applications such as automobiles.
It is an object of the present invention to provide a catalytic muffler of compact dimensions which is easily accommodated in small displacement internal combustion engine applications.
It is a further object of the present invention to provide such a compact catalytic muffler which also has noise attenuation capabilities to obviate the need for a separate muffler.
It is also an object of the present invention to provide a noise abating catalytic muffler design for small engine applications which is simple and comparatively inexpensive to produce and which lends itself readily both to O.E.M. and retrofit applications.
SUMMARY OF THE INVENTION
A catalytic muffler having a housing with a first chamber and a second chamber fluidly communicating through a catalyst bed interspersed there between. A first baffle assembly in the first chamber extends between the catalyst bed and the housing. An inlet passage extends through the housing into the first chamber.
An outlet passage extends through the housing into one of the first and second chambers. A second baffle assembly in the second chamber extends between the catalyst bed and the housing. The first and second baffle assemblies act in conjunction with the housing and the reactor bed to define a flow passage through the housing from the inlet passage through at least three discrete zones of the reactor bed to the outlet passage.
The inlet and outlet passages may extend through the first chamber, either through an end of the first chamber or a side of the first chamber as desired. Alternatively, the inlet passage may extend into the first chamber and the outlet passage may extend into the second chamber.
The reactor bed may include an oxidizing catalyst in one part thereof and a reducing catalyst in another part thereof.
The reducing catalyst may be upstream of the oxidizing catalyst.
The housing may be cylindrical.
DESCRIPTION OF DRAWINGS
Preferred embodiments of the invention are described in detail below with reference to the accompanying figures in which:
Figure 1 is perspective view of a catalytic muffler according to the present invention;
Figure 2 is an exploded perspective view corresponding to Figure 1;
Figure 2A is a partially exploded view of a catalytic converter according to Figure 2 showing an alternate housing design;
Figure 2B is a partially exploded view of yet another embodiment for the housing of the catalytic converter of Figure 2;
Figure 3 is an elevational view of the catalytic muffler of Figure 1;
Figure 4 is an end elevation of the left side of the catalytic muffler of Figure 1;
Figure 5 is an end elevation of the right side of the catalytic muffler of Figure 1;
Figure 6 is a section on line 6-6 of Figure 3;
Figure 7 is a section on line 7-7 of Figure 3;
Figure 8 is a perspective view of an alternate embodiment of a catalytic muffler according to the present invention having an end inlet and a side outlet;
Figure 8A is a perspective view of another alternate embodiment of a catalytic muffler according to the present invention having a side inlet and a side outlet; and, Figure 9 is an exploded view of an alternate embodiment catalytic muffler according to the present invention;
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A catalytic muffler according to the present invention is generally indicated by reference 10 in the accompanying illustrations. The catalytic muffler 10 is illustrated as having a 5 generally cylindrical housing 12 however it will be appreciated that other shapes of housing might also be utilized.
The housing 12 has a first chamber 14 at one end thereof, and, a second chamber 16 at the opposite end. A catalyst bed 18 occupies the space between the first chamber 14 and the second chamber 16. The catalyst bed may be a catalyst bearing ceramic (or possibly other) substrate having a honeycomb like configuration with a plurality of discrete flow passages 20 extending longitudinally therethrough. Accordingly, the first and second chambers, 14 and 16 respectively, fluidly communicate with each other through the reactor bed 18.
An inlet passage 30 extends through the housing 12 into the first chamber 14. Depending on the application, the inlet passage may extend into either a side (Figure 8) or an end of the housing.
Also depending on the application, the inlet passage may have various configurations and include such arrangements as a threaded opening and a tubular elbow. The specific configuration chosen will generally depend on the exhaust system configuration and availability of space in the intended application.
An outlet passage 32 may extend either from the first chamber 14 or the second chamber 16. The outlet passage 32 may extend either from a side or an end of the housing 12. As with the inlet passage 30, the location and configuration of the outlet passage 32 will generally depend on the parameters associated with the intended application.
A first baffle assembly 40 is housed within the first chamber 14. The first baffle assembly 40 is a member with a generally T-shaped configuration. The member extends between the housing 12 and the reactor bed so as to divide the first chamber 14 into first, second and third parts, 42, 44 and 46 respectively. The first part 42 and the third part 46 each represent about one fourth (1/4) of the volume of the first chamber 14. The third part represents about one half (1/2) of the volume of the first chamber 14.
A second baffle assembly 50 is housed within the second chamber 16 and extends between the housing 12 and the reactor bed 18 to divide the second chamber into first and second parts 52 and 54 respectively. The first part 52 and the second part 54 are of roughly equal volume.
The first baffle assembly 40, second baffle assembly 50, housing 12 and reactor bed 18 cooperate to define a flow passage through at least first, second and third discrete zones, 60, 62 and 64, respectively, of the reactor bed 18.
Gas is therefore directed to flow from the inlet passage 30 into the first part 42 of the first chamber 14, through the first zone 60, through the first part 52 of the second chamber 16, through the second zone 62 of the reactor bed 18 into the second part 44 of the first chamber 12 and through the third zone 64 of the reactor bed into the second part 54 of the second chamber 18. If the outlet passage 32 communicates with the second part 54 of the second chamber 18, gas will be discharged therethrough.
If the outlet passage 32 communicates with the third part 46 of the first chamber 14, gas will flow from the second part 54 of the second chamber 16 through a fourth zone 66 of the reactor bed, into the third part of the first chamber 14 and out through the outlet 32. In this latter embodiment, gas will flow four times through the reactor bed 18 albeit through a different zone each time. In the former embodiment, gas will flow three times through the reactor bed 18, through a different zone each time.
The reactor bed 18 may itself be made up of more than one section and one section may bear an oxidizing catalyst with another section bearing a reducing catalyst. It is expected that the catalytic muffler 10 will be more effective if the reducing section is upstream of the oxidizing section, for example, if the first zone 60 and second zone 62 promote reduction and the third zone 64 and fourth zone 66 (if there is a fourth zone) promote oxidation.
One manner of configuring the catalytic muffler 10 is illustrated in the exploded view of Figure 2. The housing 12 is made up of first and second disc-shaped parts 80 and 82 which may be joined at respective outer edges to a sleeve 90. The first baffle member 40 may be generally P-shaped, or alternatively, T-shaped and act as a spacer to locate the reactor bed 16 within the housing 12. The second baffle member 50 may be rectangular or alternatively, generally D-shaped and act as a further spacer to locate the reactor bed 18 within the housing 12. Retainer rings 92 may also be provided to engage the interior of the sleeve 90 to locate the reactor bed 18.
Alternatively, as illustrated in Figure 2B the housing 12 may be in three parts with a first cup-shaped part 88 and second cup-shaped part 92 capping opposite ends of the sleeve 90.
As yet a further alternative, the housing may be made up of first and second cup-shaped parts 94, 96 respectively which may be joined at respective outer edges 98 and 100.
The above description is intended in an illustrative rather than a restrictive sense. Variations to the exact structures described may be apparent to those skilled in such structures without departing from the spirit and scope of the present invention as defined by the claims set out below.
Figure 2A is a partially exploded view of a catalytic converter according to Figure 2 showing an alternate housing design;
Figure 2B is a partially exploded view of yet another embodiment for the housing of the catalytic converter of Figure 2;
Figure 3 is an elevational view of the catalytic muffler of Figure 1;
Figure 4 is an end elevation of the left side of the catalytic muffler of Figure 1;
Figure 5 is an end elevation of the right side of the catalytic muffler of Figure 1;
Figure 6 is a section on line 6-6 of Figure 3;
Figure 7 is a section on line 7-7 of Figure 3;
Figure 8 is a perspective view of an alternate embodiment of a catalytic muffler according to the present invention having an end inlet and a side outlet;
Figure 8A is a perspective view of another alternate embodiment of a catalytic muffler according to the present invention having a side inlet and a side outlet; and, Figure 9 is an exploded view of an alternate embodiment catalytic muffler according to the present invention;
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A catalytic muffler according to the present invention is generally indicated by reference 10 in the accompanying illustrations. The catalytic muffler 10 is illustrated as having a 5 generally cylindrical housing 12 however it will be appreciated that other shapes of housing might also be utilized.
The housing 12 has a first chamber 14 at one end thereof, and, a second chamber 16 at the opposite end. A catalyst bed 18 occupies the space between the first chamber 14 and the second chamber 16. The catalyst bed may be a catalyst bearing ceramic (or possibly other) substrate having a honeycomb like configuration with a plurality of discrete flow passages 20 extending longitudinally therethrough. Accordingly, the first and second chambers, 14 and 16 respectively, fluidly communicate with each other through the reactor bed 18.
An inlet passage 30 extends through the housing 12 into the first chamber 14. Depending on the application, the inlet passage may extend into either a side (Figure 8) or an end of the housing.
Also depending on the application, the inlet passage may have various configurations and include such arrangements as a threaded opening and a tubular elbow. The specific configuration chosen will generally depend on the exhaust system configuration and availability of space in the intended application.
An outlet passage 32 may extend either from the first chamber 14 or the second chamber 16. The outlet passage 32 may extend either from a side or an end of the housing 12. As with the inlet passage 30, the location and configuration of the outlet passage 32 will generally depend on the parameters associated with the intended application.
A first baffle assembly 40 is housed within the first chamber 14. The first baffle assembly 40 is a member with a generally T-shaped configuration. The member extends between the housing 12 and the reactor bed so as to divide the first chamber 14 into first, second and third parts, 42, 44 and 46 respectively. The first part 42 and the third part 46 each represent about one fourth (1/4) of the volume of the first chamber 14. The third part represents about one half (1/2) of the volume of the first chamber 14.
A second baffle assembly 50 is housed within the second chamber 16 and extends between the housing 12 and the reactor bed 18 to divide the second chamber into first and second parts 52 and 54 respectively. The first part 52 and the second part 54 are of roughly equal volume.
The first baffle assembly 40, second baffle assembly 50, housing 12 and reactor bed 18 cooperate to define a flow passage through at least first, second and third discrete zones, 60, 62 and 64, respectively, of the reactor bed 18.
Gas is therefore directed to flow from the inlet passage 30 into the first part 42 of the first chamber 14, through the first zone 60, through the first part 52 of the second chamber 16, through the second zone 62 of the reactor bed 18 into the second part 44 of the first chamber 12 and through the third zone 64 of the reactor bed into the second part 54 of the second chamber 18. If the outlet passage 32 communicates with the second part 54 of the second chamber 18, gas will be discharged therethrough.
If the outlet passage 32 communicates with the third part 46 of the first chamber 14, gas will flow from the second part 54 of the second chamber 16 through a fourth zone 66 of the reactor bed, into the third part of the first chamber 14 and out through the outlet 32. In this latter embodiment, gas will flow four times through the reactor bed 18 albeit through a different zone each time. In the former embodiment, gas will flow three times through the reactor bed 18, through a different zone each time.
The reactor bed 18 may itself be made up of more than one section and one section may bear an oxidizing catalyst with another section bearing a reducing catalyst. It is expected that the catalytic muffler 10 will be more effective if the reducing section is upstream of the oxidizing section, for example, if the first zone 60 and second zone 62 promote reduction and the third zone 64 and fourth zone 66 (if there is a fourth zone) promote oxidation.
One manner of configuring the catalytic muffler 10 is illustrated in the exploded view of Figure 2. The housing 12 is made up of first and second disc-shaped parts 80 and 82 which may be joined at respective outer edges to a sleeve 90. The first baffle member 40 may be generally P-shaped, or alternatively, T-shaped and act as a spacer to locate the reactor bed 16 within the housing 12. The second baffle member 50 may be rectangular or alternatively, generally D-shaped and act as a further spacer to locate the reactor bed 18 within the housing 12. Retainer rings 92 may also be provided to engage the interior of the sleeve 90 to locate the reactor bed 18.
Alternatively, as illustrated in Figure 2B the housing 12 may be in three parts with a first cup-shaped part 88 and second cup-shaped part 92 capping opposite ends of the sleeve 90.
As yet a further alternative, the housing may be made up of first and second cup-shaped parts 94, 96 respectively which may be joined at respective outer edges 98 and 100.
The above description is intended in an illustrative rather than a restrictive sense. Variations to the exact structures described may be apparent to those skilled in such structures without departing from the spirit and scope of the present invention as defined by the claims set out below.
Claims (12)
1. A catalytic muffler (10) comprising:
a housing (12) having a first chamber (14), and a second chamber (16) fluidly communicating through a catalyst bearing reactor bed (18) interspersed therebetween; said reactor bed (18) having a plurality of discrete flow passages (20) extending longitudinally therethrough to provide fluid communication between said first and second chamber (14, 16); characterised in that the catalytic muffler (10) further comprises:
a first baffle assembly (40) extending longitudinally through said first chamber (14) between said catalyst bearing reactor bed (18) and said housing (12) to longitudinally partition said first chamber (14);
an inlet passage (30) extending through said housing (12) into said first chamber (14);
an outlet passage (32) extending through said housing (12) into one of said first chamber (14) and said second chamber (16);
a second baffle assembly (50) in said second chamber (16) extending between said reactor bed (18) and said housing (12);
said first and second baffle assemblies (40, 50) are configured in a manner that they are acting in conjunction with said housing (12) and said reactor bed (18) to define a flow passage through said housing (12) from said inlet passage (30) to said outlet passage (32) requiring at least three sequential longitudinal passes through said reactor bed (18) with each subsequent of said passes being through a discrete, laterally adjacent zone (60, 62, 64, 66) of said reactor bed (18) and opposite in direction to an immediately preceding of said passes.
a housing (12) having a first chamber (14), and a second chamber (16) fluidly communicating through a catalyst bearing reactor bed (18) interspersed therebetween; said reactor bed (18) having a plurality of discrete flow passages (20) extending longitudinally therethrough to provide fluid communication between said first and second chamber (14, 16); characterised in that the catalytic muffler (10) further comprises:
a first baffle assembly (40) extending longitudinally through said first chamber (14) between said catalyst bearing reactor bed (18) and said housing (12) to longitudinally partition said first chamber (14);
an inlet passage (30) extending through said housing (12) into said first chamber (14);
an outlet passage (32) extending through said housing (12) into one of said first chamber (14) and said second chamber (16);
a second baffle assembly (50) in said second chamber (16) extending between said reactor bed (18) and said housing (12);
said first and second baffle assemblies (40, 50) are configured in a manner that they are acting in conjunction with said housing (12) and said reactor bed (18) to define a flow passage through said housing (12) from said inlet passage (30) to said outlet passage (32) requiring at least three sequential longitudinal passes through said reactor bed (18) with each subsequent of said passes being through a discrete, laterally adjacent zone (60, 62, 64, 66) of said reactor bed (18) and opposite in direction to an immediately preceding of said passes.
2. A catalytic muffler (10) as claimed in claim 1 wherein:
one of said inlet and said outlet passages (30, 32) extends through an end wall of said housing (12);
the other of said inlet and said outlet passages (32, 30) extends through a side wall of said housing (12).
one of said inlet and said outlet passages (30, 32) extends through an end wall of said housing (12);
the other of said inlet and said outlet passages (32, 30) extends through a side wall of said housing (12).
3. A catalytic muffler (10) as claimed in claim 1 wherein:
said inlet and said outlet passages (30, 32) extend through a side wall of said housing (12).
said inlet and said outlet passages (30, 32) extend through a side wall of said housing (12).
4. A catalytic muffler (10) as claimed in claim 1 wherein:
said inlet and outlet passages (30, 32) extend through an end wall of said housing (12).
said inlet and outlet passages (30, 32) extend through an end wall of said housing (12).
5. A catalytic muffler (10) as claimed in any one of claims 2, 3 or 4 wherein:
said reactor bed (18) includes an oxidizing catalyst in one part thereof and a reducing catalyst in another part thereof.
said reactor bed (18) includes an oxidizing catalyst in one part thereof and a reducing catalyst in another part thereof.
6. A catalytic muffler (10) as claimed in claim 4 wherein:
said inlet passage (30) extends into said first chamber (14);
said outlet passage (32) extends into said second chamber (16).
said inlet passage (30) extends into said first chamber (14);
said outlet passage (32) extends into said second chamber (16).
7. A catalytic muffler (10) as claimed in claim 6 wherein:
said reducing catalyst is upstream of said oxidizing catalyst.
said reducing catalyst is upstream of said oxidizing catalyst.
8. A catalytic muffler (10) as claimed in claim 7 wherein:
said reactor bed (18) is made up of sections with said oxidizing catalyst and said reducing catalyst being on different of said sections.
said reactor bed (18) is made up of sections with said oxidizing catalyst and said reducing catalyst being on different of said sections.
9. A catalytic muffler (10) as claimed in any one of claims 1 to 8, wherein:
said housing (12) is cylindrical.
said housing (12) is cylindrical.
10. A catalytic muffler (10) as claimed in claim 1 or 2 wherein:
said housing (12) is cylindrical and defined by cup shaped first and second parts (94, 96) joined at respective outer edges (98, 100); and, said first and second baffle members (40, 50) act as spacers to locate said reactor bed (18) within said housing (12).
said housing (12) is cylindrical and defined by cup shaped first and second parts (94, 96) joined at respective outer edges (98, 100); and, said first and second baffle members (40, 50) act as spacers to locate said reactor bed (18) within said housing (12).
11. A catalytic muffler (10) as claimed in claim 1 or 2 wherein:
12 said housing (12) is cylindrical and made up of cup shaped first and second parts (94, 96), joined at respective outer edges (98, 100) to respective ends of a sleeve (90); and, said first and second baffle assemblies (40, 50) act as spacers to locate said reactor bed (18) within said housing (12).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/891,326 | 2001-06-27 | ||
US09/891,326 US7018590B2 (en) | 2001-06-27 | 2001-06-27 | Reverse flow catalytic muffler |
PCT/CA2002/000928 WO2003002852A2 (en) | 2001-06-27 | 2002-06-21 | Reverse flow catalytic muffler |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2448648A1 CA2448648A1 (en) | 2003-01-09 |
CA2448648C true CA2448648C (en) | 2008-03-11 |
Family
ID=25397988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002448648A Expired - Fee Related CA2448648C (en) | 2001-06-27 | 2002-06-21 | Reverse flow catalytic muffler |
Country Status (10)
Country | Link |
---|---|
US (1) | US7018590B2 (en) |
EP (1) | EP1488083B1 (en) |
AT (1) | ATE380288T1 (en) |
AU (1) | AU2002344877A1 (en) |
CA (1) | CA2448648C (en) |
DE (1) | DE60223948T2 (en) |
DK (1) | DK1488083T3 (en) |
ES (1) | ES2298374T3 (en) |
PT (1) | PT1488083E (en) |
WO (1) | WO2003002852A2 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7169365B2 (en) * | 2002-03-26 | 2007-01-30 | Evolution Industries, Inc. | Automotive exhaust component and method of manufacture |
US7323145B2 (en) * | 2002-03-26 | 2008-01-29 | Evolution Industries, Inc. | Automotive exhaust component and method of manufacture |
CN100397916C (en) * | 2003-03-13 | 2008-06-25 | 移动365 | Virtual network solution for sms message exchange between GSM and ANSI (TIA/EIA 41) networks |
US7685714B2 (en) | 2003-03-18 | 2010-03-30 | Tursky John M | Automotive exhaust component and process of manufacture |
CA2508159C (en) * | 2005-05-24 | 2009-05-05 | Ecocing Corporation | Improved reversing flow catalytic converter for internal combustion engines |
US20080069742A1 (en) * | 2006-09-19 | 2008-03-20 | Cummins Filtration Ip, Inc. | Infinitely variable aftertreatment systems and manufacturing process |
FR3027953A1 (en) * | 2014-10-29 | 2016-05-06 | Peugeot Citroen Automobiles Sa | EXHAUST LINE COMPRISING A TWO-PART DEPOLLUTION BRICK |
EP3085913B1 (en) * | 2015-04-22 | 2017-10-11 | Faurecia Systèmes d'Echappement | Device for purifying exhaust gases, exhaust line comprising said device |
Family Cites Families (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3577728A (en) * | 1969-03-19 | 1971-05-04 | Joe W Von Brimer | Exhaust gas processing system |
US3613359A (en) * | 1970-01-15 | 1971-10-19 | Lear Siegler Inc | Aspirated exhaust system |
US3712065A (en) * | 1970-12-04 | 1973-01-23 | Clevepak Corp | Antipollution exhaust system for an internal combustion engine |
US3729936A (en) * | 1971-05-24 | 1973-05-01 | Universal Oil Prod Co | Method and means for catalytically treating engine exhaust gases |
US3832443A (en) * | 1971-08-26 | 1974-08-27 | Union Oil Co | Exhaust gas conversion process |
US3910770A (en) * | 1971-12-23 | 1975-10-07 | Gulf Research Development Co | Catalytic converter |
US3918918A (en) * | 1972-03-15 | 1975-11-11 | Lummus Co | Catalytic reactor |
US3823555A (en) * | 1972-04-26 | 1974-07-16 | Gen Motors Corp | Internal combustion engine and method of operation for exhaust emission control |
US3857458A (en) * | 1972-09-11 | 1974-12-31 | Toyo Kogyo Co | Exhaust gas outlet means for an internal combustion engine |
GB1446553A (en) * | 1972-12-06 | 1976-08-18 | Nicoll W L G | Mufflers |
FR2226865A5 (en) | 1973-04-17 | 1974-11-15 | Ferodo Sa | Exhaust silencer for automobile engines - has constant area gas passage to prevent back pressure on engine |
US4008570A (en) * | 1973-06-11 | 1977-02-22 | Nissan Motor Co., Ltd. | Method and apparatus for purifying exhaust gases |
US3929420A (en) * | 1973-08-31 | 1975-12-30 | Minnesota Mining & Mfg | Dual cross-flow canister |
US3957445A (en) * | 1974-06-12 | 1976-05-18 | General Motors Corporation | Engine exhaust system with monolithic catalyst element |
JPS5430052B2 (en) * | 1974-09-06 | 1979-09-27 | ||
US3948810A (en) * | 1974-07-23 | 1976-04-06 | Universal Oil Products Company | Monolithic catalyst support member |
US4197704A (en) * | 1976-06-11 | 1980-04-15 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust manifold for internal combustion engine |
US4321240A (en) * | 1976-09-08 | 1982-03-23 | Carus Chemical Company | Treatment of gaseous effluent |
US4094645A (en) * | 1977-01-24 | 1978-06-13 | Uop Inc. | Combination muffler and catalytic converter having low backpressure |
JPS53110617U (en) * | 1977-02-09 | 1978-09-04 | ||
US4209493A (en) * | 1977-07-11 | 1980-06-24 | Nelson Industries, Inc. | Combination catalytic converter and muffler for an exhaust system |
DE7810865U1 (en) * | 1978-04-12 | 1978-09-21 | Dolmar Maschinen-Fabrik Gmbh & Co, 2000 Hamburg | EXHAUST SILENCER FOR EXHAUST DEVICES OF COMBUSTION MACHINES, IN PARTICULAR OF COMBUSTION MACHINE-DRIVEN HAND APPLIANCES |
US4541240A (en) * | 1980-07-23 | 1985-09-17 | Munro John H | Exhaust system for internal combustion engines |
US4393652A (en) * | 1980-07-23 | 1983-07-19 | Munro John H | Exhaust system for internal combustion engines |
US4420933A (en) * | 1981-06-03 | 1983-12-20 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust system |
JPS5939721U (en) * | 1982-09-08 | 1984-03-14 | 本田技研工業株式会社 | Installation structure of turbocharger and catalytic converter in engine |
US4601168A (en) * | 1984-12-12 | 1986-07-22 | Harris Harold L | Noise and emission control apparatus |
US4797263A (en) * | 1986-03-06 | 1989-01-10 | General Motors Corporation | Monolithic catalytic converter with improved gas distribution |
US4735283A (en) * | 1986-12-04 | 1988-04-05 | Tenneco Inc. | Muffler with flow director plates |
DE3733402A1 (en) * | 1987-10-02 | 1989-04-13 | Emitec Emissionstechnologie | CATALYST ARRANGEMENT WITH FLOW GUIDE |
US4916897A (en) * | 1988-01-08 | 1990-04-17 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purifying apparatus built-in to a muffler for a diesel engine |
CA1262869A (en) * | 1988-06-23 | 1989-11-14 | Glen Knight | Combined muffler and catalytic converter exhaust unit |
US4894987A (en) * | 1988-08-19 | 1990-01-23 | Ap Parts Manufacturing Company | Stamp formed muffler and catalytic converter assembly |
IT1232749B (en) * | 1989-04-12 | 1992-03-05 | I R T I Istituto Di Ricerca E | EXHAUST GAS PURIFIER WITH CATALYTIC ACTIVITY AND SILENCER FOR INTERNAL COMBUSTION ENGINES |
US5016438A (en) * | 1989-09-25 | 1991-05-21 | Harris International Sales Corporation | Emission control apparatus |
US5220789A (en) * | 1991-03-05 | 1993-06-22 | Ford Motor Company | Integral unitary manifold-muffler-catalyst device |
US5138834A (en) * | 1991-04-01 | 1992-08-18 | General Motors Corporation | Exhaust system for v-configured internal combustion engine with close-mounted catalytic converter |
JP2603033B2 (en) * | 1991-08-30 | 1997-04-23 | ブリッグス アンド ストラットン コーポレイション | Exhaust muffler |
US5134849A (en) * | 1991-11-26 | 1992-08-04 | Mcwhorter Edward M | Engine gas ejector exhaust system |
US5185998A (en) * | 1992-04-10 | 1993-02-16 | Kenneth Brew | Catalytic converter accessory apparatus |
US5431013A (en) * | 1993-01-11 | 1995-07-11 | Fuji Jukogyo Kabushiki Kaisha | Engine exhaust apparatus |
JPH0814033A (en) * | 1994-06-24 | 1996-01-16 | Caterpillar Inc | Module catalytic converter for internal combustion engine and muffler |
US5548955A (en) * | 1994-10-19 | 1996-08-27 | Briggs & Stratton Corporation | Catalytic converter having a venturi formed from two stamped components |
DK57996A (en) | 1996-05-15 | 1997-11-16 | Silentor As | Muffler |
US6159429A (en) * | 1999-04-30 | 2000-12-12 | Bemel; Milton M. | Apparatus for treating hydrocarbon and carbon monoxide gases |
-
2001
- 2001-06-27 US US09/891,326 patent/US7018590B2/en not_active Expired - Lifetime
-
2002
- 2002-06-21 AT AT02742591T patent/ATE380288T1/en active
- 2002-06-21 DK DK02742591T patent/DK1488083T3/en active
- 2002-06-21 WO PCT/CA2002/000928 patent/WO2003002852A2/en active IP Right Grant
- 2002-06-21 ES ES02742591T patent/ES2298374T3/en not_active Expired - Lifetime
- 2002-06-21 DE DE60223948T patent/DE60223948T2/en not_active Expired - Lifetime
- 2002-06-21 AU AU2002344877A patent/AU2002344877A1/en not_active Abandoned
- 2002-06-21 CA CA002448648A patent/CA2448648C/en not_active Expired - Fee Related
- 2002-06-21 PT PT02742591T patent/PT1488083E/en unknown
- 2002-06-21 EP EP02742591A patent/EP1488083B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2448648A1 (en) | 2003-01-09 |
EP1488083B1 (en) | 2007-12-05 |
DE60223948T2 (en) | 2008-11-13 |
EP1488083A2 (en) | 2004-12-22 |
ES2298374T3 (en) | 2008-05-16 |
WO2003002852A2 (en) | 2003-01-09 |
DE60223948D1 (en) | 2008-01-17 |
US20030003030A1 (en) | 2003-01-02 |
PT1488083E (en) | 2008-03-17 |
AU2002344877A1 (en) | 2003-03-03 |
ATE380288T1 (en) | 2007-12-15 |
DK1488083T3 (en) | 2008-04-14 |
WO2003002852A3 (en) | 2004-10-14 |
US7018590B2 (en) | 2006-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2448742C (en) | Combined catalytic muffler | |
US6669913B1 (en) | Combination catalytic converter and filter | |
EP1584800B1 (en) | Engine exhaust muffler with exhaust emission control function | |
US5378435A (en) | Silencer combined with catalytic converter for internal combustion engines and modular diaphragm elements for said silencer | |
US6846464B2 (en) | Bimodal catalyst-urea SCR system for enhanced NOx conversion and durability | |
US7282185B2 (en) | Emission control apparatus | |
CA2448648C (en) | Reverse flow catalytic muffler | |
EP1403476B1 (en) | Gas flow silencer | |
ATE87069T1 (en) | FILTER AND AFTERCOMBUSTION DEVICE FOR EXHAUST GASES, PARTICULARLY FROM COMBUSTION ENGINES. | |
MY137326A (en) | Heatable honeycomb body with two different coatings | |
JP2006207531A (en) | Muffler integrated type denitration device, internal combustion engine provided with denitration device and power generation system provided with internal combustion engine | |
US20060286013A1 (en) | Engine exhaust system component having structure for accessing aftertreatment device | |
US20030185726A1 (en) | Device for catalytic treatment of a gas flow | |
US5265419A (en) | Soot-particle filter for after-treatment of the exhaust gases of diesel engines | |
KR20000014271U (en) | Catalytic Integrated Multistage Corona Reactor | |
KR20070007268A (en) | Honeycomb body comprising at least one space-saving sensor and corresponding lambda probe | |
US20200003103A1 (en) | Exhaust aftertreatment system for an engine | |
RU2249707C1 (en) | Converter-muffler | |
RU2115002C1 (en) | Catalyst converter | |
KR100191998B1 (en) | Device for reducing harmful constituents of the exhaust gases in internal combustion engine | |
KR20010097916A (en) | Converter for vehicle | |
RU2102605C1 (en) | Waste gas cleaner | |
RU2262606C2 (en) | Converter-muffler | |
JPH0426648Y2 (en) | ||
KR950031229A (en) | Multi-stage Stacked Catalytic Converter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20180621 |