The present invention relates to an exhaust system of the engine. In particular, the present invention relates to an integrated exhaust muffler for attenuation of noise as well as the back pressure of the fluid coming out of the engine.
BACKGROUND OF THE INVENTION
The primary function of a muffler is to attenuate the noises produced due to the exhaust gases from an internal combustion engine. Generally the exhaust gases from the exhaust valve of the engine, enters the muffler through the exhaust manifold. Wherein the exhaust gases travel through the muffler for attenuation of the noises produced.
The muffler is to be compactly packed because of the space constraint. Moreover, the mufflers are having absorptive as well as reflective properties. Wherein, for absorptive mufflers, requires linings to absorb the noises and for reflective mufflers, due to mismatch of noise impedance, the noise is attenuated.
The US Patent No. US5388407 discloses an exhaust manifold catalytic reactor and muffler for an automotive internal combustion engine. Which includes at least one exhaust branch for conducting exhaust gases from the cylinder head exhaust ports of an engine to a hollow, generally cylindrical primary catalyst substrate for treating the exhaust gases flowing from the engine. The substrate has inner and outer surfaces which are generally cylindrical and which define an inner cavity. A housing connected to the exhaust branch places the exhaust gases in contact with the substrate and includes a generally cylindrical container having an outer wall. The outer wall has an inside surface which, together with the outer surface of the substrate, defines an annular gas flow passage which has a area which gradually decreases as the circumferential distance from the transition increases. Wherein the US5388407's muffler comprises of catalyst to absorb the noise. Furthermore, the present invention is about the absorptive muffler.

The US Patent Application No. 15/409173 discloses a muffler which includes a first chamber, a second chamber, an extender tube, a reverse flow tube, and a separation chamber. The first chamber is coupled to an exhaust inlet of the muffler. The extender tube is coupled to the first chamber and the second chamber. The exhaust gas flows from the first chamber to the second chamber through the extender tube in a first direction. The reverse flow tube coupled to the second chamber. The exhaust gas flows through the second chamber from the extender tube to the reverse flow tube in a second direction different than the first direction. The separation chamber that provides spatial separation between the first and second chamber. This type of muffler is a reflective type muffler. Furthermore, the muffler of the present invention is not an integrated exhaust muffler.
Therefore, for the above reasons there is need in art of a muffler which is having integrated exhaust and also completely reflective type of muffler, which attenuates the noises as well as the back pressure of the exhaust gases from the IC engine.
OBJECTIVES OF THE INVENTION
The object of the present invention is to provide a muffler which has integrated exhaust manifold.
Another objective of the present invention is to provide a muffler which attenuate noises as well as reduce the back pressure produced from the exhaust gases from the IC engine.
Further object of the present invention is to provide a muffler which is completely reflective type muffler.
Furthermore, the object of the present invention is to provide a muffler which is compactly packed and positioned.
SUMMARY OF THE INVENTION
A muffler (100) to attenuate noises as well as reduce the back pressure produced from the fluid from an engine having atleast a two cylinders, comprises of, atleast a two exhaust runners (101), said exhaust runners (101) having a first end (101a) and the second end

(101b), wherein the first end (101a) of each of the said exhaust runner (101) is fluidically connected to an exhaust port of each of the engine's cylinder; and a fluid housing (102), said fluid housing (102) comprises of, atleast a two baffles (103), said baffles (103) are equidistantly or at varying distance positioned inside the fluid housing (102) to form atleast a three chambers (104); at least two inlet recess (105), said each of the inlet recess (105) is positioned tangentially to the axis of the fluid housing (102); an perforated pipe (106), said perforated pipe (106) having a first end and a second end, wherein the first end and the second end of the perforated pipe (106) is affixed to the baffles (103) which are positioned in the extreme end and pass through the intermediate baffles (103); and an outlet pipe (107), said outlet pipe is affixed appropriately in the fluid housing (102), wherein the discharged fluid in the fluid housing (102) enters said particular chamber (104a), said discharged fluid in the particular chamber (104a) enters the outlet pipe (107) through the perforation on the perforated surface (107a) of the outlet pipe (107) to dispose the said discharged fluid in the environment.
BRIEF DESCRIPTION OF THE DIAGRAMS
Figure 1 depicts the side view of an embodiment of the muffler of the present invention.
Figure 2 portrays the top view of an embodiment of the muffler of the present invention.
Figure 3 shows the side view of an another embodiment of the muffler of the present invention.
Figure 4 describes the top view of an another embodiment of the muffler of the present invention.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE INVENTION
The present invention as embodied by a "A Muffler" succinctly fulfils the above-mentioned need(s) in the art. The present invention has objective(s) arising as a result of the above-mentioned need(s), said objective(s) being enumerated below. In as much as the objective(s) of the present invention are enumerated, it will be obvious to a person skilled in the art that, the enumerated objective(s) are not exhaustive of the present invention in its entirety, and are enclosed solely for the purpose of illustration. Further, the present invention encloses within its scope and purview, any structural alternative(s) and/or any functional equivalent(s) even though, such structural alternative(s) and/or any functional equivalent(s) are not mentioned explicitly herein or elsewhere, in the present disclosure. The present invention therefore encompasses also, any improvisation(s)/modification(s) applied to the structural alternative(s)/functional alternative(s) within its scope and purview. The present invention may be embodied in other specific form(s) without departing from the spirit or essential attributes thereof.
Throughout this specification, the use of the word "comprise" and variations such as "comprises" and "comprising" may imply the inclusion of an element or elements not specifically recited.
A muffler (100) to attenuate noises as well as reduce the back pressure produced from the fluid from an engine having atleast a two cylinders, comprises of, atleast a two exhaust runners (101), said exhaust runners (101) having a first end (101a) and the second end (101b), wherein the first end (101a) of each of the said exhaust runner (101) is fluidically connected to an exhaust port of each of the engine's cylinder; and a fluid housing (102), said fluid housing (102) comprises of, atleast a two baffles (103), said baffles (103) are equidistantly or at varying distance positioned inside the fluid housing (102) to form atleast a three chambers (104); at least two inlet recess (105), said each of the inlet recess (105) is positioned tangentially to the axis of the fluid housing (102), wherein each of the inlet recess (105) is fluidically connected to the second end (101b) of each of the exhaust runners (101), to discharge the fluid from the engine's cylinder into each of the chambers (104), except a particular chamber (104a); an perforated pipe (106), said perforated pipe

(106) having a first end and a second end, wherein the first end and the second end of the
perforated pipe (106) is affixed to the baffles (103) which are positioned in the extreme end
and pass through the intermediate baffles (103), said discharged fluid in the chambers
(104) which are located in the extreme end of the fluid housing (102) enters the perforated
5 pipe (106) through the first end and the second end of the perforated pipe (106) and said
discharged fluid from other chambers (104) enters the perforated pipe (106) through the
perforation on the perforated pipe (106); and an outlet pipe (107), said outlet pipe is affixed
appropriately in the fluid housing (102), wherein the outlet pipe (107) comprising a partial
perforated surface (107a) and the remaining surface is solid, said perforated surface
10 (107a) is located in said particular chamber (104a), wherein the discharged fluid in the fluid
housing (102) enters said particular chamber (104a), said discharged fluid in the particular chamber (104a) enters the outlet pipe (107) through the perforation on the perforated surface (107a) of the outlet pipe (107) to dispose the said discharged fluid in the environment.
15 Said baffles (103) can also comprise a plurality of perforations on its surface. Said
particular chamber (104a) can be varied as suited, preferably in the intermediate chambers. Wherein the disposed fluid in the environment having reduced noises and temperature.
In an exemplified embodiment as shown in the figure 1 and figure 2, an engine comprising
20 two cylinders. Exhaust fluid from the engine is discharged to the muffler (100) through the
exhaust runners (101), wherein each exhaust runner is fluidically connected to the fluid
housing and each of the engine’s cylinder. The fluid housing (102) comprising of two
baffles (103) forming three chambers (104). The exhaust runners (101) discharge the
exhaust fluid into the respective chambers. The discharged fluid in the chamber undergoes
25 the expansion process as well as repeated reflection inside the chamber, this reduces the
acoustic waves of the fluid. Furthermore, said fluid enters the perforated pipe from the first
end and the second end of the perforated pipe and thus the compression of the fluid takes
place. Due to the collision of fluids from the different chambers, in opposite direction, the
acoustic waves cancels each other. Furthermore, the acoustic waves are suppressed due
30 to the mismatch of acoustic impedance. The fluid from the perforated pipe enters the
6

particular chamber through the perforation on the perforated pipe. Said fluid undergoes
further expansion as well as repeated reflection inside the particular chamber before
entering the outlet pipe through the perforation on the outlet pipe and the said fluid pass
out of the fluid housing through the outlet pipe where the noises of the fluid is attenuated.
5 The repeated expansion and compression of the fluid in the fluid housing, reduces the
back pressure as well as the temperature of the fluid in the fluid housing.
In an another exemplified embodiment as shown in figure 3 and figure 4, an engine comprises three cylinders. Exhaust fluid from the engine is discharged to the muffler (100) through the exhaust runners (101), wherein each exhaust runner is fluidically connected to
10 the fluid housing and each of the engine’s cylinder. The fluid housing (102) comprising of
three baffles forming four chambers. The exhaust runners (101) discharge the exhaust fluid into the respective chambers. The discharged fluid in the chamber undergoes the expansion process as well as repeated reflection inside the chamber, this reduces the acoustic waves of the fluid. Furthermore, said fluid from the extreme chambers enters the
15 perforated pipe through the first end and the second end and the fluid from the
intermediate chambers enters the perforated pipe through the perforations on it. The acoustic waves of the fluid gets cancelled due to the collision of fluid from transverse as well as from opposite direction. Furthermore, the acoustic waves are suppressed due to the mismatch of acoustic impedance. The fluid from the perforated pipe enters the
20 particular chamber through the perforation on the perforated pipe. Said fluid undergoes
further expansion as well as repeated reflection inside the particular chamber before entering the outlet pipe through the perforation on the outlet pipe and the said fluid pass out of the fluid housing through the outlet pipe where the noises of the fluid is attenuated. The repeated expansion and compression of the fluid in the fluid housing, reduces the
25 back pressure as well as the temperature of the fluid in the fluid housing.
In yet another embodiment, the engine may comprise cylinder of any number. Wherein the
number of baffles in the fluid housing are equal to the number of cylinders in the engine.
The number of chambers in the fluid housing formed is one more than the number of
baffles. The position of the particular chamber can positioned in any of the intermediate
30 chambers. The exhaust runners (101) discharge the exhaust fluid into the respective
7

chambers. The discharged fluid in the chamber undergoes the expansion process as well as repeated reflection inside the chamber, this reduces the acoustic waves of the fluid. Furthermore, said fluid from the extreme chambers enters the perforated pipe through the first end and the second end and the fluid from the intermediate chambers enters the perforated pipe through the perforations on it. The acoustic waves of the fluid gets cancelled due to the collision of fluid from transverse as well as from opposite direction. Furthermore, the acoustic waves are suppressed due to the mismatch of acoustic impedance. The fluid from the perforated pipe enters the particular chamber through the perforation on the perforated pipe. Said fluid undergoes further expansion as well as repeated reflection inside the particular chamber before entering the outlet pipe through the perforation on the outlet pipe and the said fluid pass out of the fluid housing through the outlet pipe where the noises of the fluid is attenuated. The repeated expansion and compression of the fluid in the fluid housing, reduces the back pressure as well as the temperature of the fluid in the fluid housing.
It will be apparent to a person skilled in the art that the above description is for illustrative purposes only and should not be considered as limiting. Various modifications, additions, alterations, and improvements without deviating from the spirit and the scope of the invention may be made by a person skilled in the art.

We claim,

A muffler (100) to attenuate noise as well as reduce the back pressure produced from the fluid from an engine having atleast a two cylinders, comprises of:
atleast two exhaust runners (101), said exhaust runners (101) having a first end (101a) and a second end (101b), wherein the first end (101a) of each of the said exhaust runner (101) is fluidically connected to an exhaust port of each of the engine's cylinder; and a fluid housing (102), said fluid housing (102) comprises of,
atleast two baffles (103), said baffles (103) positioned inside the fluid housing (102) to form atleast a three chambers (104); atleast two inlet recess (105), said each of the inlet recess (105) is positioned tangentially to the axis of the fluid housing (102), wherein each of the inlet recess (105) is fluidically connected to the second end (101b) of each of the exhaust runners (101), to discharge the fluid from the engine cylinder into each of the chambers (104), except a particular chamber (104a);
a perforated pipe (106), said perforated pipe (106) having a first end and a second end, wherein the first end and the second end of the perforated pipe (106) is affixed to the baffles (103) which are positioned in the extreme end and pass through the intermediate baffles (103), said discharged fluid in the chambers (104) which are located in the extreme end of the fluid housing (102) enters the perforated pipe (106) through the first end and the second end of the perforated pipe (106) and said discharged fluid from other chambers (104) enters the perforated pipe (106) through the perforation on the perforated pipe (106); and an outlet pipe (107), said outlet pipe is affixed appropriately in the fluid housing (102), wherein the outlet pipe (107) comprising a partial perforated surface (107a) and the remaining surface is solid, said

perforated surface (107a) is located in said particular chamber (104a), wherein the discharged fluid in the fluid housing (102) enters said particular chamber (104a), said discharged fluid in the particular chamber (104a) enters the outlet pipe (107) through the perforation on the perforated surface (107a) of the outlet pipe (107) to dispose the said discharged fluid in the environment.
A muffler (100) as claimed in claim 1, said baffles (103) are equidistantly positioned inside the fluid housing (102).
A muffler (100) as claimed in claim 1, said baffles (103) are positioned at varying distance from each other, inside the fluid housing (102).
A muffler (100) as claimed in claim 1, said baffles (103) optionally comprises a plurality of perforations on its surface.
A muffler (100) as claimed in claim 1, said particular chamber (104a) is positioned at the one of the intermediate chambers.
A muffler (100) as claimed in claim 1, wherein the disposed fluid in the environment having reduced temperature and noises.