FORM 2
THE PATENTS ACT 1970
[39 OF 1970]
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10; rule 13] TITLE: “A DIFFUSER ASSEMBLY FOR AN EXHAUST SYSTEM OF A VEHICLE”
Name and Address of the Applicant:
TATA MOTORS LIMITED; an Indian company having a registered address at Bombay
House, 24 Homi Mody Street, Hutatma Chowk, Mumbai 400 001 Maharashtra, India.
Nationality: Indian
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD
Present disclosure, in general, relates to the field of automobiles. Particularly, but not exclusively, the present disclosure relates to an exhaust system of a vehicle. Further, embodiments of the present disclosure relate to a diffuser assembly to reduce temperature of exhaust gas and noise due to venting of the exhaust gas from the exhaust system of the vehicle.
BACKGROUND OF THE DISCLOSURE
Exhaust particulate matter is one of the complex by-products of exhaust emissions from an internal combustion engine of the vehicle. The exhaust particulate matter may include fine solid particles suspended in the exhaust gas along with other components therein, when such exhaust gas is produced due to burning of charge in an internal combustion engine of the vehicle. Presence of such suspended particles in the exhaust gas may cause health hazards when introduced to the atmosphere without being treated. Also, long-term exposure to particulate matter results in ailments such as heart disease, pulmonary disorder, choking sensation, among others.
Generally, for treating such particulate matter in the exhaust gas, the vehicles have been equipped with a number of emission control devices such as, a particulate matter filter (PMF) and a catalytic converter, which reduce amount of particulate matters being emitted from the internal combustion engine by trapping and treating such particles. Over time, such filters accumulate particulate matter, requiring regeneration for efficient filtering of the exhaust gas which in-turn increases temperature of the exhaust gas in a range of 550˚C to 600˚C.
The filtered exhaust gas from the PMF is released to surroundings through a diffuser. Stringent emission guidelines for engines in various jurisdictions necessitate use of such exhaust after-treatment devices, thereby resulting in release of exhaust gas with high temperatures to the surroundings. Exhaust gas from the diffuser with high temperatures is harmful to the surroundings. Flow of the exhaust gas through the diffuser causes noise pollution in the surroundings of the vehicles, especially in vertical exhaust systems. Since, the diffuser is often positioned proximal to a cabin of an operator/driver, where noise due to flow of exhaust gas through the diffuser may distract the operator/driver, may fade honking from other vehicles and thus, may affect drivability of the operator/driver.
The present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the conventional mechanisms.

SUMMARY OF THE DISCLOSURE
One or more shortcomings of the prior art are overcome by a method and a system as claimed and additional advantages are provided through the method and the system 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 one non-limiting embodiment of the present disclosure a diffuser assembly for an exhaust system in a vehicle is disclosed. The diffuser assembly comprises a nozzle and a diffuser. The nozzle is defined with a first end connectable to at least a portion of the exhaust system and is configured to receive exhaust gas. A second end (1’’) of the nozzle is defined with a converging portion being connected to the exhaust system. The diffuser is defined with a plurality of cut sections at a first end and is connectable to the nozzle to define a plurality of openings proximal to the converging portion of the nozzle upon connection of the diffuser and the nozzle. The plurality of openings is configured to draw air from surroundings into the diffuser. The diffuser is defined with a plurality of vents at a second end opposite to the first end to vent the exhaust gas.
In an embodiment, each vent of the plurality of vents is defined by a rib, adapted to outwardly extend from the second end of the diffuser.
In an embodiment, the rib of each vent of the plurality of vents is oriented in a curved profile to reduce noise due to flow of the exhaust gas from the diffuser to the surroundings.
In an embodiment, the diffuser is defined with a plurality of apertures proximal to circumference of the diffuser at the second end.
In an embodiment, the plurality of openings draws air to mix with the exhaust gas and reduce temperature of the exhaust gas before venting to the surroundings.
In an embodiment, the diffuser is defined with a gradually increasing volume between the first end and the second end.
In an embodiment, diameter of the diffuser at the first end is less than diameter at the second end.

In an embodiment, the plurality of cut sections are defined with a rectangular profile extending along length of the diffuser to allow air from the surroundings to the diffuser.
In an embodiment, the diffuser is defined with a bent profile extending between the first end and the second end.
In another non-limiting embodiment, an exhaust system for a vehicle is disclosed. The exhaust system comprises a tailpipe, an exhaust purification device and a diffuser assembly. The tailpipe is connectable to an engine of the vehicle to receive exhaust gas from the engine disposed on a body of the vehicle. The exhaust purification device is connectable to the tailpipe to receive the exhaust gas from the engine and filter the exhaust gas. The diffuser assembly comprises a nozzle and a diffuser. The nozzle is defined with a first end connectable to at least a portion of the exhaust system and is configured to receive exhaust gas. A second end of the nozzle is defined with a converging portion being connected to the exhaust system. The diffuser is defined with a plurality of cut sections at a first end and is connectable to the nozzle to define a plurality of openings proximal to the converging portion of the nozzle upon connection of the diffuser and the nozzle. The plurality of openings is configured to draw air from surroundings into the diffuser. The diffuser is defined with a plurality of vents at a second end opposite to the first end to vent the exhaust gas.
In an embodiment, each vent of the plurality of vents is defined by a rib, adapted to outwardly extend from the second end of the diffuser.
In an embodiment, the rib of each vent of the plurality of vents is oriented in a curved profile to reduce noise due to flow of the exhaust gas from the diffuser to the surroundings.
In an embodiment, the diffuser is defined with a plurality of apertures proximal to circumference of the diffuser at the second end.
In an embodiment, the plurality of openings draws air to mix with the exhaust gas and reduce temperature of the exhaust gas before venting to the surroundings.
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 a side view of a vehicle connected to the diffuser assembly, in accordance with an embodiment of the present disclosure.
Figure 2a illustrates a front view of a diffuser assembly for an exhaust system of the vehicle in accordance with an embodiment of the present disclosure.
Figure 2b illustrates a side view of the diffuser assembly, in accordance with an embodiment of the present disclosure.
Figure 2c illustrates a rear view of the diffuser assembly, in accordance with an embodiment of the present disclosure.
Figure 2d illustrates a front view of the diffuser assembly connected to a tailpipe of the vehicle, in accordance with an 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 system and method illustrated herein may be employed without departing from the principles of the disclosure described herein.
DETAILED DESCRIPTION
While the embodiments in the disclosure are subject to various modifications and alternative forms, specific embodiment thereof has been shown by way of example in the figures and will be described below. It should be understood, however that it is not intended to limit the

disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, assembly, mechanism, system, that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
Embodiments of the present disclosure discloses a diffuser assembly for an exhaust system in a vehicle is disclosed. The diffuser assembly comprises a nozzle and a diffuser. The nozzle is defined with a first end connectable to at least a portion of the exhaust system and is configured to receive exhaust gas. A second end of the nozzle is defined with a converging portion being connected to the exhaust system. The diffuser is defined with a plurality of cut sections at a first end and is connectable to the nozzle to define a plurality of openings proximal to the converging portion of the nozzle upon connection of the diffuser and the nozzle. The plurality of openings is configured to draw air from surroundings into the diffuser. The diffuser is defined with a plurality of vents at a second end opposite to the first end to vent the exhaust gas. With such configuration, the diffuser assembly may reduce temperature of exhaust gas from the vehicle before venting to surroundings and may maintain minimal exhaust gas temperature. Further, the diffuser assembly may substantially reduce noise due to venting of the exhaust gas.
The disclosure is described in the following paragraphs with reference to Figures 1 to 2d. In the figures, the same element or elements which have same functions are indicated by the same reference signs. It is to be noted that, the vehicle is not illustrated in the figures for the purpose of simplicity. One skilled in the art would appreciate that the assembly and the system as disclosed in the present disclosure may be used in any vehicle including but not liming to heavy and light commercial vehicles, load carrying vehicles, passenger vehicles having vertical exhaust systems and the like. The system and the method of the present disclosure may also be implemented in vehicles having other exhaust systems, for suitably venting the exhaust gas without deviating from the principles of the present disclosure.

Figures 1 illustrates an exemplary embodiment depicting a diffuser assembly (100) connected to an exhaust system (200) of a vehicle (300). The vehicle (300) may include the exhaust system (200) connectable to the engine of the vehicle (300). In the illustrative embodiment, the exhaust system (200) may include a vertical exhaust system (200), where the diffuser assembly (100) may be positioned vertically extending from a tailpipe (7) of the vehicle (300) and proximal to a cabin (301) of the vehicle (300) as can be seen in Figure 1. In an embodiment, the diffuser assembly (100) may reduce temperature of an exhaust gas from the tailpipe (7) and noise due to venting of the exhaust gas through the diffuser assembly (100). The exhaust system (200) may comprise the tailpipe (7), an exhaust purification device and the diffuser assembly (100). In an embodiment, the exhaust purification device may include at least one of a catalytic converter, a particulate matter filter and the like. The tailpipe (7) may be connectable to an engine of the vehicle (300) to receive exhaust gas from the engine disposed on a body of the vehicle (300). The exhaust purification device may be connectable to the tailpipe (7) to receive the exhaust gas from the engine and filter the exhaust gas.
Figures 2a to 2d refer to an exemplary embodiment of the present disclosure which illustrate the diffuser assembly (100) for the exhaust system (200) of the vehicle (300). The diffuser assembly (100) may be connectable to the exhaust system (200) of the vehicle (300) to receive exhaust gas from an engine of the vehicle (300). The diffuser assembly (100) may be configured to vent the exhaust gas received from the exhaust system (200) of the vehicle (300). In an embodiment, the diffuser assembly (100) may be connected to the exhaust purification device, such as the catalytic converter and the particulate matter filter, which in-turn is connectable to an exhaust manifold of the engine to receive filtered exhaust gas from the particulate matter filter. In an embodiment, the exhaust purification device may increase temperature of the exhaust gas. The catalytic converter may increase the temperature of the exhaust gas by a chemical reaction, where the particulate matter filter may increase temperature of the exhaust gas during regeneration.
The diffuser assembly (100) may receive the exhaust gas from the exhaust purification device of the vehicle (300). The diffuser assembly (100) comprises a nozzle (1) and a diffuser (2). The nozzle (1) may be connectable to at least a portion of the exhaust system (200) at a first end (1’) to receive the exhaust gas. The nozzle (1) may be defined with a converging portion (1a) at a second end (1’’) opposite to the first end (1’) being connected to the exhaust system (200). The converging portion (1a) may be defined by a taper at the second end (1’’) of the nozzle

(1), where the nozzle (1) may be configured to receive and guide the exhaust gas through the converging portion (1a). The converging portion (1a) may reduce pressure of the exhaust gas and may create a pressure difference between exit of the converging portion (1a) and the plurality of openings (3) defined at the first end (2’) of the diffuser (2). In an embodiment, the nozzle (1) may be connected to the exhaust system (200) through a tailpipe (7) as best seen in Figure 2d.
Further, the diffuser (2) may be connectable to the nozzle (1) on the second end (1’’) of the nozzle (1) proximal to the converging portion (1a) of the nozzle (1). The diffuser (2) may be defined with a first end (2’) connectable to the nozzle (1) and a second end (2’’) opposite to the first end (2’). The second end (2’’) may be configured to vent the exhaust gas received from the nozzle (1) to surroundings. The first end (2’) of the diffuser (2) may be defined with a plurality of cut sections (2a). The plurality of cut sections (2a) may define a plurality of openings (3) proximal to the converging portion (1a) of the nozzle (1), upon connection of the nozzle (1) and the diffuser (2) as best seen in Figure 2a. The nozzle (1) may be connected to the diffuser (2) by at least one of welding, brazing, and the like, where the first end (2’) of the diffuser (2) may be connected the second end (1’’) of the nozzle (1).
In an embodiment, the flow of the exhaust gas due to the converging portion (1a) of the nozzle (1) may create the pressure difference between exit of the converging portion (1a) and the plurality of openings (3) defined at the first end (2’) of the diffuser (2). The pressure difference may be created due to venturi effect, where cross sectional area at exit of the converging portion (1a) may be less than cross sectional area at inlet of the converging portion (1a). The difference in pressure is depicted using continuity equation and Bernoulli’s equation below.
As per continuity equation,

Where, A1 indicates the cross-sectional area at inlet of the converging portion (1a) and A2 indicates the cross sectional area at exit of the converging portion (1a). As A1 > A2, so v2 > v1 As per Bernoulli’s Equation:

Where, P1 indicates the pressure at inlet of the converging portion (1a) and P2 indicates the pressure at exit of the converging portion (1a).
Therefore, the pressure at the exit of the converging portion (1a) may be lower than the pressure at the inlet of the converging portion (1a), creating a negative pressure at the plurality of openings (3). The plurality of openings (3) may be configured to draw air from the surroundings, due to the negative pressure. Further, the air from the plurality of openings (3) may mix with the exhaust gas exiting the converging portion (1a) of the nozzle (1) due to the negative pressure. In the illustrative embodiment, the plurality of openings (3) are defined proximal to the converging portion (1a) of the nozzle (1) to draw air from surroundings into the diffuser (2), thereby eliminating requirement for additional components and minimizing material required for the diffuser (2) to draw air and cool the exhaust gas in the diffuser (2) and the same shall not be considered a limitation. In an embodiment, the temperature of the exhaust gas at the exit of the converging portion (1a) may be in a range of 550˚C to 600˚C and temperature of the air from the surroundings may be in a range of 25˚C to 50˚C. The temperature of the air from the surroundings may vary and the same shall not be considered a limitation. Such difference in temperature of the air from the surroundings and the exhaust gas may result in transfer of heat between the air and the exhaust gas, thereby reducing the temperature of the exhaust gas while the exhaust gas and the air may be flowing along the diffuser (2) from the first end (2’) to the second end (2’’). For example, the diffuser assembly (100) may receive the exhaust gas at an inlet temperature in the range of 550˚C to 600˚C, where the exhaust gas may mix with the air drawn from the surrounding and may further cool down due to increased surface area at the plurality of vents (4). The exhaust gas may exit the diffuser assembly (100) at an outlet temperature in a range of 200˚C to 260˚C. In an embodiment, the diffuser assembly (100) may vent the exhaust gas at a minimum temperature of 200˚C and a maximum temperature of 260˚C.
Referring now to Figure 2b, the diffuser (2) may be defined with a tubular profile. In an embodiment, cross section of the tubular profile may be selected from a group consisting of a circle and a polygon and the same shall not be considered a limitation. In an embodiment, the tubular profile of the diffuser (2) may be defined with a gradually increasing volume between the first end (2’) and the second end (2’’), where the diameter of the diffuser (2) at the first end (2’) may be less than diameter at the second end (2’’). Further, the diffuser (2) may be defined with a bent profile between the first end (2’) and the second end (2’’). In an embodiment, the

angle of curvature of the bent profile between the first end (2’) and the second end (2’’) may be defined in a range of 55 to 135 degrees. In the illustrative embodiment, the angle of curvature is depicted as 90 degrees between the first end (2’) and the second end (2’’) to vent the exhaust gas along direction of vehicle (300) movement parallel to a chassis of the vehicle (300) and the same shall not be considered a limitation. The diffuser assembly (100) may be mounted vertically proximal to a cabin (301) of the vehicle (300) where the bent profile may streamline air flowing against the diffuser (2) of the diffuser assembly (100) while the vehicle (300) is moving. The curvature of the bent profile may allow laminar flow of the exhaust gas between the first end (2’) and the second end (2’’).
Referring again to Figure 2a, the second end (2’’) of the diffuser (2) may be defined with a plurality of vents (4) to vent the exhaust gas and the air to the surroundings. The plurality of vents (4) may extend along at least one of a lengthwise direction, a breadthwise direction, a diagonal direction of a face of the diffuser (2). In the illustrative embodiment, the plurality of vents (4) are depicted along lengthwise direction of a plate of the diffuser (2) defined at the second end (2’’) of the diffuser (2). In an embodiment, the plate may be integrally formed at the second end (2’’) of the diffuser (2’’). The plate may be defined as a separate component that may be fastened at the second end (2’’), where the plurality of vents (4) may be defined on the plate. The plurality of vents (4) split flow of the exhaust gas and the air into plurality of horizontal streams and increase surface area of the exhaust gas to cool down the exhaust gas and the same shall not be considered a limitation. In an embodiment, each vent of the plurality of vents (4) may extend up to a substantial portion of the plate of the diffuser (2). However, the length of the plurality of vents (4) may be varied based on requirement. For sake of illustration, the plurality of vents (4) are depicted as five vents (4) defined equidistantly from each other and along length of the face of the diffuser (2) and the same shall not be considered a limitation. Further, length of each vent of the plurality of vents (4), distance between each vent and alignment of each vent may be varied based on the requirement.
Each of the plurality of vents (4) may be defined by a rib (5), where such rib (5) is outwardly extending from the second end (2’’) of the diffuser (2) and configured to guide the exhaust gas and the air to the surroundings along the rib (5). The rib (5) may extend along circumference of each vent of the plurality of vents (4) as can be seen in Figure 2a. In an embodiment, the rib (5) of each vent of the plurality of vents (4) extends from the second end (2’’) and may be oriented in a curved profile to reduce noise due to flow of the exhaust gas from the diffuser (2)

to the surroundings. The rib (5) may extend from the second end (2’’) may be oriented in the curved profile where a concave portion may be defined between the second end (2’’) and the rib (5) of each vent. The concave portion may guide the exhaust gas and the air along the rib (5) to vent to the surroundings as best seen in Figure 2b. The plurality of vents (4) at the second end (2’’) may split flow of the exhaust gas and the air into a plurality of streams, where surface area of the flow may be increased to further cool the exhaust gas and the air by the surrounding air at the second end (2’’).
In an embodiment, the diffuser (2) may be defined with the plurality of apertures (6) proximal to circumference of the diffuser (2) at the second end (2’’) to vent the exhaust gas and avoid formation of the at least one vortex at the second end (2’’) of the diffuser (2). The plurality of apertures (6) may be defined laterally proximal to the circumference of the diffuser (2) to vent a portion of the exhaust gas in lateral direction to reduce the noise due to flow of the exhaust from the diffuser (2). In an embodiment, the diameter of the plurality of apertures (6) may be defined to reduce noise by a range of 2 to 4 decibels. In an embodiment, the diameter of each aperture of the plurality of apertures (6) may be ranging from 4mm to 8mm.
In an embodiment, the diffuser (2) may be defined with a top surface (2b) and a bottom surface (2c) defined between the first end (2’) and the second end (2’’) as best seen in Figure 2b. The diffuser (2) may be defined with a dampening material along the top surface (2b) to reduce noise due to the flow of the exhaust gas through the diffuser (2). The dampening material may be defined as a layer spreading between the first end (2’) and the second end (2’’) of the diffuser (2) and the same shall not be considered a limitation. In an embodiment, the dampening material may be selected from group consisting of glass wool and mineral wool. The dampening material may be selected between glass wool and mineral wool based on temperature of the exhaust gas.
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 (100) 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 (100) 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 Numeral:

Component Referral numeral
Diffuser assembly 100
Nozzle 1
First end of Nozzle 1’
Second end of Nozzle 1’’
Converging portion 1a
Diffuser 2
First end 2’
Second end 2’’
Plurality of cut sections 2a
Plurality of openings 3
Plurality of vents 4
Rib 5
Plurality of apertures 6
Tailpipe 7
Exhaust system 200
Vehicle 300
Cabin 301
Top surface 2b
Bottom surface 2c

We claim:
1. A diffuser assembly (100) for an exhaust system (200) of a vehicle (300), the diffuser
assembly (100) comprising:
a nozzle (1) defined with a first end (1’) connectable to at least a portion of the exhaust system (200) and configured to receive exhaust gas, and a second end (1’’) of the nozzle (1) being defined with a converging portion (1a) being connected to the exhaust system (200); and
a diffuser (2) defined with a plurality of cut sections (2a) at a first end (2’) and connectable to the nozzle (1) to define a plurality of openings (3) proximal to the converging portion (1a) of the nozzle (1) upon connection of the diffuser (2) and the nozzle (1), wherein the plurality of openings (3) being configured to draw air from surroundings into the diffuser (2), and
a plurality of vents (4) defined on the diffuser (2) at a second end (2’’) opposite to the first end (2’) to vent the exhaust gas.
2. The diffuser assembly (100) as claimed in claim 1, wherein each vent of the plurality of vents (4) is defined by a rib (5), adapted to outwardly extend from the second end (2’’) of the diffuser (2).
3. The diffuser assembly (100) as claimed in claim 2, wherein the rib (5) of each vent of the plurality of vents (4) are oriented in a curved profile to reduce noise due to flow of the exhaust gas from the diffuser (2) to the surroundings.
4. The diffuser assembly (100) as claimed in claim 2, wherein the diffuser (2) is defined with a plurality of apertures (6) proximal to circumference of the diffuser (2) at the second end (2’’).
5. The diffuser assembly (100) as claimed in claim 1, wherein the plurality of openings (3) draws air to mix with the exhaust gas and reduce temperature of the exhaust gas before venting to the surroundings.
6. The diffuser assembly (100) as claimed in claim 1, wherein the diffuser (2) is defined with a gradually increasing volume between the first end (2’) and the second end (2’’).

7. The diffuser assembly (100) as claimed in claim 6, wherein diameter of the diffuser (2) at the first end (2’) is less than diameter at the second end (2’’).
8. The diffuser assembly (100) as claimed in claim 1, wherein the plurality of cut sections (2a) are defined with a rectangular profile extending along length of the diffuser (2) to allow air from the surroundings to the diffuser (2).
9. The diffuser assembly (100) as claimed in claim 1, wherein the diffuser (2) is defined with a bent profile extending between the first end (2’) and the second end (2’’).
10. An exhaust system (200) for a vehicle (300), the exhaust system (200) comprising:
a tailpipe (7) connectable to an engine of the vehicle (300) to receive exhaust gas from the engine, the engine being disposed on a body of the vehicle (300);
an exhaust purification device connectable to the tailpipe (7) to receive the exhaust gas from the engine and filter the exhaust gas; and
a diffuser assembly (100) connectable to the exhaust purification device to receive the exhaust gas from the tailpipe (7), the diffuser assembly (100) comprising:
a nozzle (1) defined with a first end (1’) connectable to at least a portion of
the exhaust system (200) and configured to receive the exhaust gas, and a second
end (1’’) of the nozzle (1) being defined with a converging portion (1a) being
connected to the exhaust system (200); and
a diffuser (2) defined with a plurality of cut sections (2a) at a first end (2’)
and connectable to the nozzle (1) to define a plurality of openings (3) proximal to
the converging portion (1a) of the nozzle (1) upon connection of the diffuser (2)
and the nozzle (1), wherein the plurality of openings (3) being configured to draw
air from surroundings into the diffuser (2), and
a plurality of vents (4) defined on the diffuser (2) at a second end (2’’)
opposite to the first end (2’) to vent the exhaust gas.
11. The exhaust system (200) as claimed in claim 10, wherein each vent of the plurality of
vents (4) is defined by a rib (5), adapted to outwardly extend from the second end (2’’)
of the diffuser (2).

12. The exhaust system (200) as claimed in claim 11, wherein the rib (5) of each vent of the plurality of vents (4) are oriented in a curved profile to reduce noise due to flow of the exhaust gas from the diffuser (2) to the surroundings.
13. The exhaust system (200) as claimed in claim 11, wherein the diffuser (2) is defined with a gradually increasing volume between the first end (2’) and the second end (2’’).
14. The exhaust system (200) as claimed in claim 10, wherein the plurality of openings (3) draws air to mix with the exhaust gas and reduce temperature of the exhaust gas before venting to the surroundings.