US3802163A - Internal combustion engine mufflers - Google Patents
Internal combustion engine mufflers Download PDFInfo
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- US3802163A US3802163A US00283183A US28318372A US3802163A US 3802163 A US3802163 A US 3802163A US 00283183 A US00283183 A US 00283183A US 28318372 A US28318372 A US 28318372A US 3802163 A US3802163 A US 3802163A
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- muffler
- discs
- tubular body
- asbestos
- strips
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/0215—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters the filtering elements having the form of disks or plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/922—Mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
- B01D53/925—Simultaneous elimination of carbon monoxide or hydrocarbons and nitrogen oxides
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- 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
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0226—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being fibrous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/0335—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with exhaust silencers in a single housing
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- 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
- F01N2230/02—Exhaust filters
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- 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
- F01N2330/10—Fibrous material, e.g. mineral or metallic wool
-
- 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
- F01N2330/10—Fibrous material, e.g. mineral or metallic wool
- F01N2330/101—Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like
- F01N2330/102—Fibrous material, e.g. mineral or metallic wool using binders, e.g. to form a permeable mat, paper or the like fibrous material being fiber reinforced polymer made of plastic matrix reinforced by fine glass or in the form of a loose mass of filaments or fibers
-
- 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
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/22—Selection of materials for exhaust purification used in non-catalytic purification 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
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/40—Activated carbon or charcoal
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- 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
- F01N2490/04—Two or more expansion chambers in series connected by means of tubes the gases flowing longitudinally from inlet to outlet only in one direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Definitions
- ABSTRACT A muffler is provided having a series of filter discs through which the exhaust gases may flow.
- These may include supporting discs of steel mesh or expanded metal, discs of corrugated asbestos coated with charcoal with the corrugated flutes extending parallel the muffler axis, discs of fiberglass impregnated with lithium hydroxide, perforated discs of coke, and combinations thereof. Blue clay may partially line the muffler body.
- This invention relates to an improvement in Internal Combustion Engine Mufflers and deals particularly with a muffler capable of greatly reducing the carbonomonoxide and hydrocarbon content of the emitted fumes from the engine.
- An object of the present invention resides in the provision of a muffler having a series of spaced disc-like members through which the exhaust gases must pass.
- certain of these members includes a supporting disc of steel mesh or expanded metal.
- a disc of asbestos having passages extending therethrough parallel to the axis of the muffler adjoins the metal disc, and is covered with charcoal.
- a disc of fiberglass impregnated with lithium hydroxide is provided adjoining the asbestos discs.
- Adjoining the fiberglass filter pad is preferably provided a disc of coke having passages extending therethrough in a direction parallel to the muffler axis. The filters formed in this manner have been found extremely effective in reducing air polution.
- a feature of the present invention resides in the provision of a pad formed of asbestos and charcoal which is incorporated in the filter.
- This pad is comprised of a series or corrugated strips of asbestos mounted between parallel strips of asbestos.
- the charcoal is coated on the surface of the strips.
- the flutes of the corrugated layers extend parallel to the axis of the muffler, thus forming a great number of passages extending through the disc through which the exhaust gases must flow.
- a further feature of the present invention resides in the provision of a layer of blue clay forming a partial liner along the bottom wall of the muffler body, this clay being of the type used to produce certain types of bricks. This clay seems a significant advantage in the effectiveness of the muffler.
- a further feature of the present invention resides in the provision of lumps of coke on the clay surface.
- FIG. 1 is a vertical sectional view longitudinally through the muffler showing the general arrangement of parts therein.
- FIG. 2 is an enlarged sectional view through one of the filter discs, showing the general arrangement of parts therein.
- FIG. 3 is a partial end view of one of the perforated coke discs.
- FIG. 4 is a partial end view of the asbestos-charcoal discs.
- the muffler is indicated in general by the letter A. It comprises an elongated cylindrical tube 10 having a circular end plate 11 at one end thereof. The periphery of the plate 11 is grooved to accommodate one end of the sleeve 10, forming a crimped edge 12
- An inlet 13 is provided on the end plate 11, preferably near the lower end thereof.
- a baffle plate 14 is provided with a cylindrical flange 15 which. fits snugly within the seeeve 10 and which is provided with an inturned flange 16 secured to the end plate 1 l.
- the baffle 14 is provided with an outlet opening 17 which is near the upper edge of the baffle. In any event, the inlet 13 and outlet 17 are arranged on opposite sides of the muffler axis to change the direction of flow of the gases entering the muffler body.
- a series of filter members 19, 20, 21 and 22 extend across the muffler body as indicated in FIG. 1.
- the discs are held in place by welding the metal portions of the same to the muffler sleeve, or may be fastened in any other suitable manner.
- the various filter discs are in spaced relation as indicated.
- the closure plate 23 is provided with a grooved and crimped marginal edge 24 which secures it to the sleeve 10.
- a baffle 25, similar to the baffle I4, is provided with a peripheral flange 26 terminating in an inturned flange 27 by means of which the baffle plate 25 is secured in spaced relation to the end plate 23 by welding or other suitable means.
- the end plate 23 is provided with an outlet conduit 29, and the baffle 25 is provided with an outlet sleeve'30, the passages 29 and 30 being on opposite sides of the axis of the sleeve 10. In the particular arrangement illustrated, the passage 30 near the lower edge of the mufflcr while the passage 29 is near the upper edge of the end plate 23.
- the filter plates 19 and 20 are preferably formed in the manner illustrated diagramatically in FIG. 2 of the drawings.
- the numeral 31 indicates. a disc of steel mesh or expanded metal, and this disc may if desired have a peripheral flange which is anchored to the muffler sleeve 10. Adjoining the disc 31 is a. filter disc 32 which is shown more in detail in FIG. 4 of the drawings.
- the disc 32 includes corrugated layers, or strips 33 of asbestos which are secured between parallel layers or strips 34 of the same material.
- the discs are formed similarly to multiwall corrugated paperboard with the flutes of the corrugated strips 33 extending parallel to the longitudinal axis of the muffler. This arrangement provides a great number of passages 35 extending through the discs through which the gases flow.
- the corrugated asbestos is coated with pulverized charcoal mixed with a suitable binder capable of securing the particles of charcoal to the asbestos,the coating completely lining the walls of the passages through the asbestos disc.
- each of the discs 32 Adjoining each of the discs 32 a disc or pad 36 of fiberglass or similar material, capable of withstanding the temperatures to which it is subjected-The filters 19 and are completed by discs 37 formed of coke and having passages 39 extending therethrough which are parallel to the muffler axis. These passages 39 may extend on concentric rings about the axis of the disc or may be otherwise arranged to provide adequate flow for the gases.
- the discs 21 and 22 are preferably similar to the discs 19 and 20 which have been described with the exception of the fact that the charcoal discs are omitted from the combination.
- the various elements of the disc are held together by adhesive material capable of withstanding the temperatures involved.
- a layer or blue clay 40 is provided, normally throughout the length of the muffler between the various partitions 14 and and partially lining the muffler body.
- lumps of coke such as 41 are provided resting upon the clay 40 between certain of the filter pads, as for example, between the discs 19 and 20, and between the discs 20 and 21.
- the resultant muffler has proven very effective in reducing the emission of carbon monoxide and hydro-carbon from the muffler outlet.
- a muffler having an elongated tubular body
- each end closure closing each end of said tubular body, each end closure comprising a chamber having non-aligned inlet and exit apertures through which exhaust gases may flow,
- each filter member comprising from the upstream to the downstream side respectively a metal mesh layer, a layer of corrugated strips of asbestos secured between parallel strips of asbestos, the flutes of said corrugated strips being generally parallel to the longitudinal axis of said tubular body, said strips of asbestos being coated with charcoal, and a layer of lithium hydroxide impregnated fiberglass pad.
- the muffler of claim 2 including a lining of clay on a portion of the inside wall of said tubular body adjacent said filter members.
- the muffler of claim 3 including a plurality of lumps of coke resting upon said clay lining.
Abstract
A muffler is provided having a series of filter discs through which the exhaust gases may flow. These may include supporting discs of steel mesh or expanded metal, discs of corrugated asbestos coated with charcoal with the corrugated flutes extending parallel the muffler axis, discs of fiberglass impregnated with lithium hydroxide, perforated discs of coke, and combinations thereof. Blue clay may partially line the muffler body.
Description
United States Patent [1 1 Riojas [4 1 Apr. 9, 1974 INTERNAL COMBUSTION ENGINE MUFFLERS [76] Inventor: Gregorio Riojas, 992 Argyle, St.
Paul, Minn. 55103 [22] Filed: Aug. 23, 1972 [21] Appl. No.: 283,183
[52] U.S. Cl 55/276, 55/316, 55/321, 55/418, 55/486, 55/524, 55/DIG. 30, 60/311 [51] InLCI B0ld 39/14 [58] Field of Search 55/DIG. 30, 276, 316, 387, 55/485-488, 321, 322, 524, 525; 60/311; 23/284, 285, 288 F [56] 7 References Cited UNITED STATES PATENTS 3,675,398 7/1972 Giarrizzo 55/ DIG. 30 X 821,828 5/1906 Phelps 55/DIG. 30 X 3,664,095 5/1972 Asker et al. 55/524 X 2,902,834 9/1959 Bosworth, Jr. et al 55/387 X 1,781,664 11/1930 Rockwell 55/DIG. 33 X 3,611,678 10/1971 Holden 55/387 3,593,499 7/1971 Kile 55/DIG. 30 X Primary Examiner-Frank W. Lutter Assistant Examiner-William Cuchlinski, Jr. Attorney, Agent, or Firm-Robert M. Dunning [57] ABSTRACT A muffler is provided having a series of filter discs through which the exhaust gases may flow. These may include supporting discs of steel mesh or expanded metal, discs of corrugated asbestos coated with charcoal with the corrugated flutes extending parallel the muffler axis, discs of fiberglass impregnated with lithium hydroxide, perforated discs of coke, and combinations thereof. Blue clay may partially line the muffler body.
4 Claims, 4 Drawing Figures PATENTEUAPR 9mm $802,163
INTERNAL COMBUSTION ENGINE MUFFLERS This invention relates to an improvement in Internal Combustion Engine Mufflers and deals particularly with a muffler capable of greatly reducing the carbonomonoxide and hydrocarbon content of the emitted fumes from the engine.
BACKGROUND OF THE INVENTION It is a well known fact that the fumes being emitted from an internal combustion engine such as that powering an automobile or the like contain considerable carbonmonoxide and hydrocarbon particles. During recent years the problem of air polution has been recognized to a greater and greater extent. Public sentiment against air polution has grown to the extent that at the present time the manufacturers of automobiles have been given a fixed time period to reduce the polution causing portions of the exhaust to a desired minimum.
A great number of different types of devices have been produced in an effort to meet the polution standards. Attempts are being made to burn the particles in the exhaust and to dispose of them in various ways. Numerous variations of mufflers have been produced in order to filter out the solid particles, and to reduce the earbonmonoxide content. The present invention resides in a device of this type.
SUMMARY OF THE INVENTION I have found that the impurities in the exhaust from automobile engines may be greatly reduced through the use of a muffler of my design. Tests made on vehicle engines with and without the muffler have indicated that the carbonmonoxide content of the exhaust while at idling speeds may be cut more than two-thirds, and may be cut more than half while the engine is running at 2,500 rpm. These tests also indicate that the hydrocarbon content of the exhaust fumes may be cut almost three-fourths while the engine is idling, and may be cut almost the same amount while the engine is running at 2,500 rpm. Thus the muffler has been very effective in materially reducing the air polution.
An object of the present invention resides in the provision of a muffler having a series of spaced disc-like members through which the exhaust gases must pass. In preferred form, certain of these members includes a supporting disc of steel mesh or expanded metal. A disc of asbestos having passages extending therethrough parallel to the axis of the muffler adjoins the metal disc, and is covered with charcoal. A disc of fiberglass impregnated with lithium hydroxide is provided adjoining the asbestos discs. Adjoining the fiberglass filter pad is preferably provided a disc of coke having passages extending therethrough in a direction parallel to the muffler axis. The filters formed in this manner have been found extremely effective in reducing air polution.
A feature of the present invention resides in the provision of a pad formed of asbestos and charcoal which is incorporated in the filter. This pad is comprised of a series or corrugated strips of asbestos mounted between parallel strips of asbestos. The charcoal is coated on the surface of the strips. The flutes of the corrugated layers extend parallel to the axis of the muffler, thus forming a great number of passages extending through the disc through which the exhaust gases must flow.
A further feature of the present invention resides in the provision of a layer of blue clay forming a partial liner along the bottom wall of the muffler body, this clay being of the type used to produce certain types of bricks. This clay seems a significant advantage in the effectiveness of the muffler.
A further feature of the present invention resides in the provision of lumps of coke on the clay surface.
These and other objects and novel features of the present invention will be more clearly and fully set forth in the following specification and claims.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view longitudinally through the muffler showing the general arrangement of parts therein.
FIG. 2 is an enlarged sectional view through one of the filter discs, showing the general arrangement of parts therein.
FIG. 3 is a partial end view of one of the perforated coke discs.
FIG. 4 is a partial end view of the asbestos-charcoal discs.
DESCRIPTION OF THE PREFERRED EMBODIMENT The muffler is indicated in general by the letter A. It comprises an elongated cylindrical tube 10 having a circular end plate 11 at one end thereof. The periphery of the plate 11 is grooved to accommodate one end of the sleeve 10, forming a crimped edge 12 An inlet 13 is provided on the end plate 11, preferably near the lower end thereof. A baffle plate 14 is provided with a cylindrical flange 15 which. fits snugly within the seeeve 10 and which is provided with an inturned flange 16 secured to the end plate 1 l. The baffle 14 is provided with an outlet opening 17 which is near the upper edge of the baffle. In any event, the inlet 13 and outlet 17 are arranged on opposite sides of the muffler axis to change the direction of flow of the gases entering the muffler body.
A series of filter members 19, 20, 21 and 22 extend across the muffler body as indicated in FIG. 1. The discs are held in place by welding the metal portions of the same to the muffler sleeve, or may be fastened in any other suitable manner. The various filter discs are in spaced relation as indicated.
An end plate 23 similar to the end plate 11 closes the outlet end of the muffler. The closure plate 23 is provided with a grooved and crimped marginal edge 24 which secures it to the sleeve 10. A baffle 25, similar to the baffle I4, is provided with a peripheral flange 26 terminating in an inturned flange 27 by means of which the baffle plate 25 is secured in spaced relation to the end plate 23 by welding or other suitable means. The end plate 23 is provided with an outlet conduit 29, and the baffle 25 is provided with an outlet sleeve'30, the passages 29 and 30 being on opposite sides of the axis of the sleeve 10. In the particular arrangement illustrated, the passage 30 near the lower edge of the mufflcr while the passage 29 is near the upper edge of the end plate 23.
The filter plates 19 and 20 are preferably formed in the manner illustrated diagramatically in FIG. 2 of the drawings. The numeral 31 indicates. a disc of steel mesh or expanded metal, and this disc may if desired have a peripheral flange which is anchored to the muffler sleeve 10. Adjoining the disc 31 is a. filter disc 32 which is shown more in detail in FIG. 4 of the drawings. As
indicated in this figure, the disc 32 includes corrugated layers, or strips 33 of asbestos which are secured between parallel layers or strips 34 of the same material. In other words, the discs are formed similarly to multiwall corrugated paperboard with the flutes of the corrugated strips 33 extending parallel to the longitudinal axis of the muffler. This arrangement provides a great number of passages 35 extending through the discs through which the gases flow. The corrugated asbestos is coated with pulverized charcoal mixed with a suitable binder capable of securing the particles of charcoal to the asbestos,the coating completely lining the walls of the passages through the asbestos disc.
Adjoining each of the discs 32 a disc or pad 36 of fiberglass or similar material, capable of withstanding the temperatures to which it is subjected-The filters 19 and are completed by discs 37 formed of coke and having passages 39 extending therethrough which are parallel to the muffler axis. These passages 39 may extend on concentric rings about the axis of the disc or may be otherwise arranged to provide adequate flow for the gases.
The discs 21 and 22 are preferably similar to the discs 19 and 20 which have been described with the exception of the fact that the charcoal discs are omitted from the combination. The various elements of the disc are held together by adhesive material capable of withstanding the temperatures involved. In the preferred form of the muffler, a layer or blue clay 40 is provided, normally throughout the length of the muffler between the various partitions 14 and and partially lining the muffler body. In some instances lumps of coke such as 41 are provided resting upon the clay 40 between certain of the filter pads, as for example, between the discs 19 and 20, and between the discs 20 and 21. The resultant muffler has proven very effective in reducing the emission of carbon monoxide and hydro-carbon from the muffler outlet.
In a test conducted by the Galaxy Auto Center in Saint Paul, Minnesota, various measurements were made to determine the extent of the polution emitting from certain cars. In general, cars were chosen which were several years old and which emitted visible exhaust fumes. In the last test which was made, the exhaust issuing from the exhaust pipe without the present muffler showed a carbonmonoxide content of 7.9 percent at idling speed and a hydrocarbon content of 1,500 pp million. At 2,500 rpm. the carbon monoxide was of 1 percent content and the hydrocarbon content was 1,150 pp million.
When the present muffler was used, at idling speed the carbon monoxide content of the emitted gases was reduced to 2.5 percent, and the gydrocarbon content was dropped to 390 pp million. At 2,500 rpm. the carbon monoxide content was reduced to 0.4 percent and the hydrocarbon content was reduced to 385 pp million. Thus a very marked reduction in the carbon monoxide and hydrocarbon content was obtained.
In accordance with the Patent Statutes, l have described the principles of construction and operation of my muffler and while I have endeavored to set forth the best embodiment thereof, I desire to have it understood that changes may be made within the scope of the following claims without departing from the spirit of my invention.
I claim:
1. A muffler having an elongated tubular body,
end closures closing each end of said tubular body, each end closure comprising a chamber having non-aligned inlet and exit apertures through which exhaust gases may flow,
a plurality of disc shaped filter members extending in spaced relationship across said tubular body so that exhaust gases flow therethrough, each filter member comprising from the upstream to the downstream side respectively a metal mesh layer, a layer of corrugated strips of asbestos secured between parallel strips of asbestos, the flutes of said corrugated strips being generally parallel to the longitudinal axis of said tubular body, said strips of asbestos being coated with charcoal, and a layer of lithium hydroxide impregnated fiberglass pad.
2. The muffler of claim 1 in which said filter members also include a perforated coke disc on the downstream side.
3. The muffler of claim 2 including a lining of clay on a portion of the inside wall of said tubular body adjacent said filter members.
4. The muffler of claim 3 including a plurality of lumps of coke resting upon said clay lining.
Claims (4)
1. A muffler having an elongated tubular body, end closures closing each end of said tubular body, each end closure comprising a chamber having non-aligned inlet and exit apertures through which exhaust gases may flow, a plurality of disc shaped filter members extending in spaced relationship across said tubular body so that exhaust gases flow therethrough, each filter member comprising from the upstream to the downstream side respectively a metal mesh layer, a layer of corrugated strips of asbestos secured between parallel strips of asbestos, the flutes of said corrugated strips being generally parallel to the longitudinal axis of said tubular body, said strips of asbestos being coated with charcoal, and a layer of lithium hydroxide impregnated fiberglass pad.
2. The muffler of claim 1 in which said filter members also include A perforated coke disc on the downstream side.
3. The muffler of claim 2 including a lining of clay on a portion of the inside wall of said tubular body adjacent said filter members.
4. The muffler of claim 3 including a plurality of lumps of coke resting upon said clay lining.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00283183A US3802163A (en) | 1972-08-23 | 1972-08-23 | Internal combustion engine mufflers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00283183A US3802163A (en) | 1972-08-23 | 1972-08-23 | Internal combustion engine mufflers |
Publications (1)
Publication Number | Publication Date |
---|---|
US3802163A true US3802163A (en) | 1974-04-09 |
Family
ID=23084903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00283183A Expired - Lifetime US3802163A (en) | 1972-08-23 | 1972-08-23 | Internal combustion engine mufflers |
Country Status (1)
Country | Link |
---|---|
US (1) | US3802163A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2418008A1 (en) * | 1978-02-22 | 1979-09-21 | Godefroy Raymond | Filter for welding fumes - has knitted wire spark guard, middle rock-wool layer and folded glass fibre paper |
US4255173A (en) * | 1977-12-27 | 1981-03-10 | Texaco Inc. | Lead filter for internal combustion engine exhaust gases |
US4344784A (en) * | 1981-02-27 | 1982-08-17 | Dexon, Inc. | Filter assembly for clean air rooms and work stations |
US4348362A (en) * | 1980-09-24 | 1982-09-07 | Minnesota Mining And Manufacturing Company | Air pollution control apparatus and process |
US4361423A (en) * | 1980-11-03 | 1982-11-30 | Nkn | Combination acoustical muffler and exhaust converter |
US4416674A (en) * | 1980-10-27 | 1983-11-22 | Texaco Inc. | Filter for treating a particle-carrying gaseous stream |
US4786299A (en) * | 1986-05-30 | 1988-11-22 | Demarco Thomas E | Vacuum loader with silencer base |
US5504281A (en) * | 1994-01-21 | 1996-04-02 | Minnesota Mining And Manufacturing Company | Perforated acoustical attenuators |
US5753013A (en) * | 1996-12-23 | 1998-05-19 | Dingfelder; Alan W. | Gas drying apparatus and method |
US6569217B1 (en) | 2000-05-10 | 2003-05-27 | Thomas M. DeMarco | Industrial dust collector with multiple filter compartments |
US6571910B2 (en) | 2000-12-20 | 2003-06-03 | Quiet Storm, Llc | Method and apparatus for improved noise attenuation in a dissipative internal combustion engine exhaust muffler |
US20050023077A1 (en) * | 2003-07-28 | 2005-02-03 | Sishtla Vishnu M. | Muffler for noise reduction |
US20050274094A1 (en) * | 2003-03-17 | 2005-12-15 | Demarco Thomas M | Vacuum loader |
US20060207230A1 (en) * | 2003-03-17 | 2006-09-21 | Demarco Maxvac Corporation | Vacuum loader with filter doors |
EP1749985A1 (en) * | 2004-05-24 | 2007-02-07 | Hino Motors, Ltd. | Exhaust gas purifier |
US20070131481A1 (en) * | 2005-12-12 | 2007-06-14 | John Mordarski | Method and apparatus for attenuating sound in a vehicle exhaust system |
CN103422945A (en) * | 2013-08-20 | 2013-12-04 | 周挺 | Muffler with filtering function |
CN105169843A (en) * | 2015-07-17 | 2015-12-23 | 安徽安释科技信息服务有限公司 | Air filtering cylinder |
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US821828A (en) * | 1905-04-10 | 1906-05-29 | Shawmut Motor Company | Muffler. |
US1781664A (en) * | 1926-07-02 | 1930-11-11 | Paul O Rockwell | Process and apparatus for purifying air |
US2902834A (en) * | 1957-07-01 | 1959-09-08 | Carrier Corp | Air conditioning apparatus |
US3593499A (en) * | 1969-04-11 | 1971-07-20 | Richard D Myerly | Exhaust muffler and purifier |
US3611678A (en) * | 1968-10-03 | 1971-10-12 | American Filtrona Corp | Activated carbon filter |
US3664095A (en) * | 1968-10-21 | 1972-05-23 | Gunnar C F Asker | Exchange packing element |
US3675398A (en) * | 1970-10-15 | 1972-07-11 | Lawrence P Giarrizzo | Exhaust filter attachment |
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US821828A (en) * | 1905-04-10 | 1906-05-29 | Shawmut Motor Company | Muffler. |
US1781664A (en) * | 1926-07-02 | 1930-11-11 | Paul O Rockwell | Process and apparatus for purifying air |
US2902834A (en) * | 1957-07-01 | 1959-09-08 | Carrier Corp | Air conditioning apparatus |
US3611678A (en) * | 1968-10-03 | 1971-10-12 | American Filtrona Corp | Activated carbon filter |
US3664095A (en) * | 1968-10-21 | 1972-05-23 | Gunnar C F Asker | Exchange packing element |
US3593499A (en) * | 1969-04-11 | 1971-07-20 | Richard D Myerly | Exhaust muffler and purifier |
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Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4255173A (en) * | 1977-12-27 | 1981-03-10 | Texaco Inc. | Lead filter for internal combustion engine exhaust gases |
FR2418008A1 (en) * | 1978-02-22 | 1979-09-21 | Godefroy Raymond | Filter for welding fumes - has knitted wire spark guard, middle rock-wool layer and folded glass fibre paper |
US4348362A (en) * | 1980-09-24 | 1982-09-07 | Minnesota Mining And Manufacturing Company | Air pollution control apparatus and process |
US4416674A (en) * | 1980-10-27 | 1983-11-22 | Texaco Inc. | Filter for treating a particle-carrying gaseous stream |
US4361423A (en) * | 1980-11-03 | 1982-11-30 | Nkn | Combination acoustical muffler and exhaust converter |
US4344784A (en) * | 1981-02-27 | 1982-08-17 | Dexon, Inc. | Filter assembly for clean air rooms and work stations |
US4786299A (en) * | 1986-05-30 | 1988-11-22 | Demarco Thomas E | Vacuum loader with silencer base |
US5504281A (en) * | 1994-01-21 | 1996-04-02 | Minnesota Mining And Manufacturing Company | Perforated acoustical attenuators |
US5753013A (en) * | 1996-12-23 | 1998-05-19 | Dingfelder; Alan W. | Gas drying apparatus and method |
US5882383A (en) * | 1996-12-23 | 1999-03-16 | Dingfelder; Alan W. | Gas drying apparatus |
US6569217B1 (en) | 2000-05-10 | 2003-05-27 | Thomas M. DeMarco | Industrial dust collector with multiple filter compartments |
US6571910B2 (en) | 2000-12-20 | 2003-06-03 | Quiet Storm, Llc | Method and apparatus for improved noise attenuation in a dissipative internal combustion engine exhaust muffler |
US20050274094A1 (en) * | 2003-03-17 | 2005-12-15 | Demarco Thomas M | Vacuum loader |
US20060207230A1 (en) * | 2003-03-17 | 2006-09-21 | Demarco Maxvac Corporation | Vacuum loader with filter doors |
US20050023077A1 (en) * | 2003-07-28 | 2005-02-03 | Sishtla Vishnu M. | Muffler for noise reduction |
US7100737B2 (en) | 2003-07-28 | 2006-09-05 | Carrier Corporation | Muffler for noise reduction |
WO2005012699A1 (en) * | 2003-07-28 | 2005-02-10 | Carrier Corporation | Muffler for noise reduction |
KR100772300B1 (en) | 2003-07-28 | 2007-11-02 | 캐리어 코포레이션 | Muffler for noise reduction |
EP1749985A1 (en) * | 2004-05-24 | 2007-02-07 | Hino Motors, Ltd. | Exhaust gas purifier |
EP1749985A4 (en) * | 2004-05-24 | 2007-08-22 | Hino Motors Ltd | Exhaust gas purifier |
US20080229732A1 (en) * | 2004-05-24 | 2008-09-25 | Hino Motors, Ltd. | Exhaust Emission Control Device |
US7549286B2 (en) | 2004-05-24 | 2009-06-23 | Hino Motors, Ltd. | Exhaust emission control device |
US20070131481A1 (en) * | 2005-12-12 | 2007-06-14 | John Mordarski | Method and apparatus for attenuating sound in a vehicle exhaust system |
CN103422945A (en) * | 2013-08-20 | 2013-12-04 | 周挺 | Muffler with filtering function |
CN105169843A (en) * | 2015-07-17 | 2015-12-23 | 安徽安释科技信息服务有限公司 | Air filtering cylinder |
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