CLIAMS:1. A muffler (100) for an internal combustion engine, comprising:
a housing (1) partitioned into plurality of chambers having a first chamber (2), a second chamber (3) and a third chamber (4) wherein a first partition plate (7) and a second partition plate (9) partitions the housing (1) into plurality of chambers;
an inlet pipe (5) of predetermined diameter fluidly connectable to an exhaust conduit (6) extends within the first chamber (2) into the second chamber (3), wherein the inlet pipe (5) directs exhaust gas from the exhaust conduit (6) into the second chamber (3); and
at least one outlet pipe (8) of predetermined diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe (5) extends within the third chamber (4) into the second chamber (3), wherein the at least one outlet pipe (8) draws the exhaust gas from the second chamber (3) and exhausts into atmosphere.

2. The muffler (100) as claimed in claim 1, wherein the first chamber (2) and the third chamber (4) are packed with sound absorbing material (12) for attenuating the exhaust gas.

3. The muffler (100) as claimed in claim 2, wherein the sound absorbing material is at least one of glass wool, steel wool and rock wool.

4. The muffler (100) as claimed in claim 1, wherein the second chamber (3) is an expansion chamber for reducing pressure of the exhaust gas received from the exhaust conduit (6).

5. The muffler (100) as claimed in claim 1, wherein the housing (1) is provided with an inlet opening (10) and an outlet opening (11) provided at opposite ends of the housing (1).

6. The muffler (100) as claimed in claim 1, wherein the inlet pipe (5) surface within the first chamber (2) and the outlet pipe (8) surface within the third chamber (4) are perforated.

7. The muffler (100) as claimed in claim 1, wherein the first partition plate (7) and the second partition plate (9) are perforated.

8. The muffler (100) as claimed in claim 1, wherein the inlet pipe (5) is provided on A-A axis and the at least one outlet pipe (8) is provided on the B-B axis.

9. The muffler (100) as claimed in claim 1, wherein the at least one outlet pipe (8) is configured as two outlet pipe having total diameter of the two outlet pipe ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe (5).

10. A vehicle provided with the muffler (100) as claimed in claim 1.
,TagSPECI:TECHNICAL FIELD
Present disclosure in general relates to a muffler. Particularly, but not exclusively, the disclosure relates to a muffler for an internal combustion engine.
BACKGROUND OF DISCLOSURE
A muffler is a sound attenuating device which is particularly installed in the exhaust system of the vehicle. Vehicles, in particularly internal combustion engine vehicles tend to develop loud noises emanating from the engine cylinder soon after combustion. These noises are loud above the normal decibel levels. These loud noises need to be attenuated so as to make it compatible with the allowed decibel levels in the environment and the vehicle norms or laws.
However, some of the vehicles are equipped with sport mufflers which have reduced attenuated properties but have more acoustical properties. These sporty mufflers produce a deep boom sound from the vehicle exhaust system which creates a sense of sporty feeling to the listener and the occupants of the vehicle. These kinds of mufflers are equipped on high end cars and sports cars which creates a rush of power to user when the engine is revved.
Moreover, many of the cars can be equipped with aftermarket mufflers which generate a lot of noise and this noise is more than the allowable limit according to the environmental laws. Such kind of mufflers is not only loud/noisy and illegal in many countries, but also deafening to the listener. Some of the aftermarket mufflers generate back pressures which hamper the performance of the vehicle.
Production vehicles such as hatchbacks and family sedans are not equipped with sporty mufflers at the installation/manufacturing line. However, some of the users equip such stock cars with aftermarket muffler installations which change the performance of the vehicle and also reduces engine life due to many factors such as improper installation, free flow exhaust generating excess power from the engines etc. Aftermarket mufflers installed in the family sedans and hatchbacks increase the noise entering the vehicle cabin and this increases the sound entering the vehicle cabin. High capacity internal combustion engines provided with four or more cylinders generate higher performances with respect to the standard family hatchback or sedans. Hence, the user needs to feel the power of such high performance cars through the hearing sense and hence, high performance cars are equipped with sports mufflers as standard.
Manufacturers targeting the general public with the standard family sedans or hatchbacks do not produce a sporty exhaust note as they are more focused in attenuating the noise from the exhaust system and reducing the noise in vehicle cabin. Also, the mufflers equipped in the standard family sedans or hatchbacks have to be in conformity with the environmental laws and keep the noise level of the vehicle under certain decibels only.
Hence there is a need to develop and manufacture a muffler capable of producing a sporty exhaust note by overcoming the above mentioned disadvantages.
OBJECTIVE OF THE DISCLOSURE
An objective of the present disclosure is to provide a muffler for generating an intensified exhaust tone.
SUMMARY OF THE DISCLOSURE
The shortcomings of the prior art are overcome and additional advantages are provided through the provision as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure.
In an embodiment of the present disclosure, a muffler for an internal combustion engine is disclosed, comprising: a housing partitioned into plurality of chambers having a first chamber, a second chamber and a third chamber wherein a first partition plate and a second partition plate, partitions the housing into plurality of chambers. An inlet pipe of predetermined diameter fluidly connectable to an exhaust conduit extends within the first chamber and into the second chamber. The inlet pipe directs exhaust gas from the exhaust conduit into the second chamber. At least one outlet pipe of predetermined diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe extends within the third chamber and into the second chamber, wherein the at least one outlet pipe draws the exhaust gas from the second chamber and exhausts into atmosphere.
In an embodiment of the present disclosure, the first chamber and the third chamber are packed with sound absorbing material for attenuating the exhaust gas.
In an embodiment of the present disclosure, the sound absorbing material is at least one of glass wool, steel wool and rock wool.
In an embodiment of the present disclosure, the second chamber is an expansion chamber for reducing pressure of the exhaust gas received from the exhaust conduit.
In an embodiment of the present disclosure, the housing is provided with an inlet opening and an outlet opening provided at opposite ends of the housing.
In an embodiment of the present disclosure, the inlet pipe surface within the first chamber and the outlet pipe surface within the third chamber are perforated.
In an embodiment of the present disclosure, the first partition plate and the second partition plate are perforated.
In an embodiment of the present disclosure, the inlet pipe is provided on A-A axis and the at least one outlet pipe is provided on the B-B axis.
In an embodiment of the present disclosure, the at least one outlet pipe is configured as two outlet pipes having total diameter of the two outlet pipes ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe.
The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The novel features and characteristic of the disclosure are set forth in the appended claims. The disclosure itself, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an illustrative embodiment when read in conjunction with the accompanying figures. One or more embodiments are now described, by way of example only, with reference to the accompanying figures wherein like reference numerals represent like elements and in which:
Figure 1 illustrates cut sectional view of the muffler according to an exemplary embodiment of the present disclosure.
Figure 2 illustrates cut sectional view of the muffler packed with sound absorbing material according to an exemplary embodiment of the present disclosure.
Figure 3 illustrates perspective sectional view of the muffler according to an exemplary embodiment of the present disclosure.
Figure 4 illustrates perspective view of the muffler provided with exhaust conduit according to an exemplary embodiment of the present disclosure.
The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION

The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and make part of this disclosure.

Referring now to the drawings wherein the drawings are for the purpose of illustrating an exemplary embodiment of the disclosure only, and not for the purpose of limiting the same.
A muffler for an internal combustion engine comprises a housing which is partitioned into plurality of chambers having a first chamber, a second chamber and a third chamber. The housing comprises a first partition plate and a second partition plate which partitions the housing into plurality of chambers. An inlet pipe of predetermined diameter is fluidly connectable to an exhaust conduit which extends within the first chamber and into the second chamber. The inlet pipe directs exhaust gas from the exhaust conduit into the second chamber, wherein the exhaust gas is emanating from the engine cylinder. At least one outlet pipe of predetermined diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe extends within the third chamber and into the second chamber, wherein the at least one outlet pipe draws the exhaust gas from the second chamber and exhausts into atmosphere.
Figure 1 illustrates cut sectional view of the muffler (100). The muffler (100) comprises housing (1) having an inlet opening (10) and outlet opening (11) located at opposite ends of the housing (1). The housing (1) is partitioned into a first chamber (2), a second chamber (3) and a third chamber (4) by a first partition plate (7) and a second partition plate (9). The first partition plate (7) and the second partition plate (9) are placed in series from the inlet opening (10) up to the outlet opening (11). The first chamber (2) is provided proximal to the inlet opening (10) and the third chamber (4) is provided proximal to the outlet opening (11). The second chamber (3) is provided in-between the first chamber (2) and the third chamber (4). The first chamber (2) consists of an inlet pipe (5) of predetermined diameter which is fluidly connectable to an exhaust conduit (6). The inlet pipe (5) extends within the first chamber (2) and into the second chamber (3), wherein the inlet pipe (5) directs exhaust gas from the exhaust conduit (6) into the second chamber (3). In an embodiment, one end of the exhaust conduit (6) is connected to a catalytic converter (not shown in figure) and other end is connected to the inlet opening (10) (refer figure 4). In an embodiment, the first chamber (2) is packed with sound absorbing material (12) for attenuating the exhaust gas coming in from the inlet pipe (5). The second chamber (3) is a hollow chamber, wherein the exhaust gas from the at least one inlet pipe (5) is directed into the second chamber (3) for expansion of the exhaust gas. In an embodiment, the second chamber (3) is an expansion chamber which reduces the pressure of the exhaust gas from the first chamber (2). The third chamber (4) consists of at least one outlet pipe (8) of predetermined diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the inlet pipe (5). The at least one outlet pipe (8) extends within the third chamber (4) and into the second chamber (3). The at least one outlet pipe (8) draws the exhaust gas from the second chamber (3) and exhausts into atmosphere. The exhaust gas travels within the muffler (100) through the first chamber (2), the second chamber (3) and the third chamber (4) before exhausting in to the atmosphere.

In an embodiment, the at least one outlet pipe (8) is configured as two or more outlet pipes having a total diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the at least one inlet pipe (5). In one embodiment two outlet pipes (8) are used. The sum of the diameter of both the outlet pipes (8) ranges from 1.4 to about 1.8 times that of the predetermined diameter of the at least one inlet pipe (5).
In an embodiment, the first partition plate (7) and the second partition plate (9) are perforated so as to allow the exhaust gas to pass through from the first chamber (2) into the second chamber (3) and then from the second chamber (3) into the third chamber (4) for attenuating and absorbing the exhaust gas.
In an embodiment, the inlet pipe (5) surface within the first chamber (2) and the outlet pipe (8) surface within the third chamber (4) are perforated.
In an embodiment, the housing (1), the inlet pipe (5), the at least one outlet pipe (8), the first partition pipe (7) and the second partition plate (9) are manufactured by using materials chosen from at least one of cast iron, stainless steel, mild steel, carbon steel or any other material which serves the purpose.
In an embodiment, the at least one inlet pipe (5) is provided on axis A-A axis, wherein the exhaust gas enters the second chamber (3) from the inlet pipe (5) provided on axis A-A.
In an embodiment, the at least one outlet pipe (8) is provided on the axis B-B, wherein the exhaust gas is drawn out from the second chamber (3) by the at least one outlet pipe (8) provided on axis B-B.
Figure 2 illustrates cut sectional view of the muffler (100) packed with sound absorbing material (12). In an embodiment, the sound absorbing material (12) is packed to the entire volume of the first chamber (2) around the inlet pipe (5) for absorbing the exhaust gas emanating from the exhaust conduit (6). In an embodiment, the sound absorbing material (12) is packed to the entire volume of the third chamber (4) around the at least one outlet pipe (8) for absorbing the exhaust gas emanating from the second chamber (3). In an embodiment, the sound absorbing material (12) is at least one of glass wool, steel wool, rock wool or any other sound absorption material (12). In an embodiment, the sound absorbing material (12) is also used as thermal insulation material.
Figure 3 illustrates perspective sectional view of the muffler (100) illustrating direction of the exhaust gas flow from the exhaust conduit (6) into the first chamber (2) through the inlet pipe (5). The exhaust gas then flows into the second chamber (3) wherein the exhaust gas expands and pressure reduces. The exhaust gas from the second chamber (3) is drawn out by the at least one outlet pipe (8) and into the atmosphere. In an embodiment, the at least one outlet pipe (8) has a predetermined diameter of 1.7 times that of the predetermined diameter of the inlet pipe (5) which draws out the expanded exhaust gas generating an intensified exhaust note. The intensified exhaust note emanating from the at least one outlet pipe (8) is within the range of about 69 db to about 74 db.
In an embodiment, the first partition plate (7) and the second partition plate (9) can be re-arranged within the housing (1) to increase or decrease the intensity of the exhaust note of the muffler (100).
In one embodiment two outlet pipes (8) are used. The sum of the diameter of both the outlet pipes (8) is 1.7 times that of the predetermined diameter of the at least one inlet pipe (5). Both the outlet pipes (8) surface within the third chamber is perforated.
Figure 4 illustrates perspective view of the muffler (100) provided with exhaust conduit (6). The muffler (100) is provided with at least one mounting member (13) which is mounted to the vehicle body (not shown in figure). In an embodiment, the muffler (100) is mounted to the vehicle body by means of at least one mounting member (13) using suitable fasteners. As illustrated, the at least one outlet pipe (8) is configured as two or more outlet pipes (8) having a total diameter ranging from about 1.4 to about 1.8 times that of the predetermined diameter of the at least one inlet pipe (5). In an embodiment, at least two outlet opening (11) is shown in figure 4.
ADVANTAGES
In one embodiment, the muffler (100) produces an intensified exhaust note which is within the acceptable limits.
In one embodiment, the muffler (100) has reduced back pressure and increased sound attenuation.
In one embodiment, the muffler (100) can be used to generate an intensified exhaust note from a low capacity internal combustion engine.
INDUSTRIAL APPLICABILITY
The muffler is used in vehicles for generating an intensified exhaust note.
EQUIVALENTS

With respect to the use of substantially any plural and/or singular terms herein, those having skill in the art can translate from the plural to the singular and/or from the singular to the plural as is appropriate to the context and/or application. The various singular/plural permutations may be expressly set forth herein for sake of clarity.
It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”

In addition, where features or aspects of the disclosure are described in terms of Markush groups, those skilled in the art will recognize that the disclosure is also thereby described in terms of any individual member or subgroup of members of the Markush group.

While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
REFERRAL NUMERALS

100 Muffler
1 Housing
2 First chamber
3 Second chamber
4 Third chamber
5 Inlet pipe
6 Exhaust conduit
7 First partition plate
8 Outlet pipe
9 Second partition plate
10 Inlet opening
11 Outlet opening
12 Sound absorption material
13 Mounting means