FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
AND
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION “AN EXHAUST COOLING SYSTEM AND A METHOD THEREOF”
APPLICANT(S)
TATA MOTORS LIMITED
Bombay House, 24 Homi Mody Street,
Hutatma Chowk, Mumbai 400 001, Maharashtra, India; an Indian company.
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD OF THE INVENTION
Present disclosure, in general, relates to a field of automobiles. Particularly, but not exclusively, the present disclosure relates to a cooling system of an internal combustion engine. Further, embodiments of the present disclosure disclose an exhaust cooling system for the internal combustion engine of a vehicle.
BACKGROUND OF THE INVENTION
Conventionally, an exhaust gas discharged from an internal combustion engine are directed to an exhaust gas processor (EGP) for processing in order to reduce the emission of air pollutants to acceptable levels. The exhaust gas processor processes the exhaust gas to eliminate large number of fine particles mainly made of carbon contained in the gas. Generally, during processing by the EGP, the flow of the high-temperature exhaust gas significantly raises a surface temperature of EGP. The rise in the EGP surface temperature generates a large amount of heat. As a result, various electronic components such as sensors, connectors and electrical wirings mounted on surface of the EGP gets damaged due to melting of one or more parts. Thereby, deteriorating efficiency, performance and functionality of the EGP.
Typically, the exhaust gas processor (EGP) includes a heat shield provided with louvres, heat discharge openings, and likewise. The heat shield is mounted on the EGP to protect surrounding parts such as wiring harnesses, nylon and plastic components and various other electronic, electromechanical components, and the like from large amount of heat generated due to substantial high EGP surface temperature. Also, in other existing applications such as refueling petroleum or oil carrying vehicles the heat shields are provided to facilitate thermal isolation of the EGP from damage caused by oil seepage/leakage from the tanks carrying oil, petrol, paint or any other inflammable products.

However, and in some instances, the exhaust temperature may go beyond a threshold limit. For example, during engine maximum power RPM, an exhaust gas temperature goes in the range of 500-550 degrees or during vehicle regeneration condition, the exhaust gas temperature goes up to 900-950 degrees. Thus, a large amount of the heat generated due to the high EGP surface temperature are trapped between the EGP and heat shield, thereby resulting in inefficient heat dissipation from a surface of EGP.
Present disclosure is directed to overcome one or more limitations stated above or any other limitations associated with the known arts.
SUMMARY OF THE INVENTION
One or more shortcomings of the prior art are overcome by a system as claimed and additional advantages are provided through the device and a 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 disclosure, an exhaust cooling system for an internal combustion engine is disclosed. The exhaust cooling system includes an exhaust gas processor (EGP) for processing an exhaust-gas. A heat shield is mounted to the exhaust gas processor (EGP). An air tank is positioned offset from the heat shield and the EGP. The air tank is configured for storing compressed air. A valve device is communicatively connected to the air tank. A control unit in response to a non-override condition is configured to actuate the valve device to permit a compressed air supply from the air tank along a flow path defined between the heat shield and the EGP when at least one engine operating parameter exceeds a predefined threshold limit. And, an override switch in response to an override condition is activated to actuate the valve device to permit the compressed air

supply from the air tank along the flow path defined between the heat shield and the EGP during at least one engine non-start condition.
In an embodiment, the air tank is disposed so as to be located at a position offset laterally from the heat shield and EGP.
In an embodiment, the valve device is a solenoid valve being electrically operated by a solenoid valve operating device in response to one or more control signals from the control unit when the at least one engine operating parameter exceeds the predetermined level.
In an embodiment, the air tank includes a plurality of air branched pipes stretching out from at least a portion thereof and extending along a longitudinal axis and then downwardly from the longitudinal axis along a lateral axis of the EGP.
In an embodiment, each of the plurality of air branched pipes comprises a pneumatic air nozzle configured to provide compressed air jets along the flow-path. In an embodiment of the present disclosure, the flow path is defined as a flow-direction of the compressed air in a predetermined gap between the heat shield and EGP.
In an embodiment, the compressed air is stored at atmospheric temperature condition.
In an embodiment, the non-override condition is determined when the control unit is configured to receive a plurality of signals corresponding to at least one engine operating parameter.
In another non-limiting embodiment of the present disclosure, the control unit in response to the non-override condition actuates the valve device when the at least one engine operating parameter including an engine RPM exceeding a

predetermined RPM level such that an exceeded RPM level equals to a maximum engine power RPM value.
In an embodiment, the control unit in response to the non-override condition actuates the valve device when the at least one engine operating parameter including a surface temperature of the EGP exceeds the predetermined level.
In an embodiment, the override condition is determined during the at least one engine non-start condition.
In an embodiment, the override switch is activated during the at least one engine non-start condition including an engine idle speed condition at a forced regeneration mode.
In one non-limiting embodiment of the disclosure, a method of cooling an exhaust system for an internal combustion engine is disclosed. The method includes aspects of disposing, an air tank offset from a heat shield and an exhaust gas pipe, where the air tank configured for storing compressed air. A valve device is communicatively connected to the air tank. The control unit in response to non-override condition is configured to actuate the valve device to permit a compressed air supply from the air tank at a predetermined higher speed along a flow path defined between the heat shield and the EGP when at least one engine operating parameter exceeds a predetermined level. At override condition, the override switch upon activation actuates the valve device to permit the compressed air supply from the air tank along the flow path defined between the heat shield and the EGP during at least one engine non-start condition.
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 characteristics 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 embodiments 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:
Fig. 1 illustrates a perspective view of an exhaust cooling system of an internal combustion engine, in accordance with an embodiment of the present disclosure.
Fig.2 illustrates an exploded view of the exhaust cooling system of the internal combustion engine, in accordance with an embodiment of the present disclosure.
Fig. 3 illustrates a schematic block diagram of the exhaust cooling system of the internal combustion engine, in accordance with an embodiment of the present disclosure.
Fig. 4 is a flow-chart of a method illustrating an automatic actuation of the solenoid valve during a non-override condition, 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 OF THE INVENTION
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 forms the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that, the conception and specific embodiments disclosed may be readily utilized as a basis for modifying other devices, systems, assemblies and mechanisms 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 scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristics of the disclosure, to its device or system, 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.
The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusions, such that a system or a device that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device. In other words, one or more elements in a system or apparatus proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus.
Embodiments of the present disclosure relates to an exhaust cooling system and a method thereof. Conventionally, a heat shield is mounted on at least a portion of the EGP. The heat shield when assembled, it covers and surrounds substantially a circumference portion of the EGP and facilitates protection of surrounding parts

such as wiring harnesses, nylon and plastic components and various other electronic, electromechanical components, and the like from large amount of heat generated due to substantial high EGP surface temperature. However, in some instances, for example during engine maximum power RPM, an exhaust gas temperature goes in the range of 500-550 degrees or during vehicle regeneration condition, the exhaust gas temperature goes up to 900-950 degrees. As a result, the EGP surface temperature significantly rise and thus the conventional heat shield does not allow in efficient dissipation of the heat generated. With rise in the EGP surface temperature, the large quantity of heat gets trapped in between the EGP and the heat shield. The trapped heat causes damage to one or more electronic components, connectors and harnesses mounted on the EGP surface, thereby causing deterioration of performance of EGP.
Accordingly, the present disclosure discloses an exhaust cooling system for an internal combustion engine is disclosed. The exhaust cooling system includes an exhaust gas processor (EGP) for processing an exhaust-gas. A heat shield is mounted to the exhaust gas processor (EGP). An air tank is positioned offset from the heat shield and the EGP. The air tank is configured for storing compressed air. A valve device is communicatively connected to the air tank. A control unit in response to a non-override condition is configured to actuate the valve device to permit a compressed air supply from the air tank along a flow path defined between the heat shield and the EGP when at least one engine operating parameter exceeds a predefined threshold limit. And, an override switch in response to an override condition is activated to actuate the valve device to permit the compressed air supply from the air tank along the flow path defined between the heat shield and the EGP during at least one engine non-start condition.
Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, same numerals have been used to refer to the same or like parts. The following paragraphs describe the present disclosure with reference to Figs. 1-4. It is to be noted that the system and

method may be employed in any vehicle including but not limited to a passenger vehicle, a utility vehicle, commercial vehicles, and any other vehicle with an exhaust system.
A vehicle includes a prime mover such as, an IC engine, which operates by combustion of fuel. The combustion process in the IC engines leads to generation of hot exhaust gases which then gets directed to an exhaust gas processor for the processing to remove air pollutants contained therein. The processing of the hot exhaust gases results in increase in a EGP surface temperature which causes damage to one or more electronic components mounted on a surface of EGP. To provide efficient dissipation of heat generated due to a high EGP surface temperature, an exhaust cooling system is included in the vehicle, where such exhaust cooling system may be connected to the IC engine through an exhaust pipe. For sake of simplicity vehicle is not illustrated in the Figs.
Fig. 1 illustrates a perspective view of an exhaust cooling system (100), in accordance with an embodiment of the present disclosure. The exhaust cooling system (100) includes an exhaust gas processor (EGP) (111) (shown in Figure 2) for processing an exhaust-gas. As illustrated, the EGP (111) receives the exhaust gas through a first exhaust pipe (106) connected to the engine (200) through an export port (109). The EGP (111) further processes the exhaust gas and directs the exhaust gas through a second exhaust pipe (105) to outside (i.e. the environment). In an illustrated embodiment, a heat shield (104) is mounted to the exhaust gas processor (EGP) (111). In particular, as illustrated, the heat shield (104) is mounted to the EGP (111) through a bracket member. Furthermore, the bracket member (107) when assembled on EGP (111) is adapted to secure one or more electronic components (110) including sensors, connectors. The heat shield is preferably made from aluminum, stainless steel or other metal. In an embodiment, the heat shield (104) comprises a plurality of heat dissipating openings (104a) formed in at least a portion thereof. The plurality of heat dissipating openings are adapted for dissipating at least some heat generated by EGP (111) to ambient. Further, in an

illustrated embodiment, the exhaust cooling system includes an air tank (101) positioned offset from the heat shield (104) and the EGP (111). The air tank (101) is configured for storing compressed air. Particularly, in an illustrated embodiment, the air tank (101) is disposed on at least a portion of a longitudinal member (not shown) of a vehicle frame (not shown) through at least two mounting members (101a), (101b). With this mounting, the air tank (101) is located at a position offset laterally from the EGP (111) and the heat shield (104). The air tank (101) includes a plurality of air branched pipes (108) stretching out from at least a portion thereof. In illustrated embodiment, the exhaust cooling system (100) further includes the valve device (103) communicatively connected to the air tank (101) through a connecting pipe member (102). During actuation of the valve device (103), a compressed air supply from air tank (101) is directed through the connecting pipe member (102) and the plurality of air branched pipes towards a flow path defined between the heat shield (104) and EGP (111). This facilitates efficient dissipation of heat generated as a result of a temperature rise of the EGP (111) to outside environment. It would be appreciating to note that in the illustrated embodiment, the flow path is defined as a flow-direction of the compressed air in a predetermined gap between the heat shield (104) and EGP (111). The predetermined gap thus providing optimum compressed air supply being sufficient enough to dissipate large heat trapped between the heat shield (104) and EGP (111). As illustrated, it is advantageous to note that the disclosed exhaust cooling system is configured for getting operated both in override condition and non-override condition. During override-condition the exhaust cooling system (100) is activated manually. The override condition includes, but not limited to, at least one engine non-start condition such as an engine forced regeneration and a failure detection condition occurring when at least one sensor of the EGP fails to communicate with the control unit (305). Further, during the non-override condition the exhaust cooling system (100) is activated automatically. The non-override condition occurs when the at least one engine operating parameter including, but not limited to, an engine RPM, a EGP surface temperature exceeds a predetermined level.

Fig.2 illustrates an exploded view of the exhaust cooling system (100) of the internal combustion engine (200), in accordance with an embodiment of the present disclosure. In an embodiment, the exhaust cooling system (100) is communicatively connected with the engine (200) through the first exhaust pipe (106). The first exhaust pipe (106) directs the exhaust gas to the EGP for the processing through an exhaust after treatment process. After processing, the exhaust gas is discharged to the outside environment through the second exhaust pipe (105).
Further, as illustrated, the exhaust cooling system (100) includes the air tank (101), the valve device (103) communicatively connected to the air tank (101) through the connecting pipe (102). The air tank (101) is configured to store compressed air at atmospheric temperature condition. As illustrated, the air tank (101) includes the plurality of air branched pipes (108) stretching out from the at least a portion thereof. In an embodiment, the plurality of air branched pipes (108) extends along a longitudinal axis (AA), and further extends downwardly from the longitudinal axis (AA) along a lateral axis (BB) of the EGP (111). Further, each of the plurality of air branched pipes (108) comprises a pneumatic air nozzle (202) configured to provide compressed air jets along the flow-path (201). In an embodiment, the heat shield (104) is mounted to at least a portion of the EGP (111) such as to surround and cover substantially a circumferential portion of the EGP (111). In particular, as illustrated, a bracket member (107) is adapted to mount the heat shield (104) to the EGP (111) through one or more fastening elements. Additionally, the bracket member (107) when assembled on EGP (111) is adapted to secure one or more electronic components (110) including sensors, connectors. With this configuration, the predetermined gap is formed between the heat shield (104) and the EGP (111). The predetermined gap formed provides a sufficient volume of a compressed air flow along the flow-path (201). Thereby, enhancing a forced air convection by facilitating an efficient dissipation of heat trapped between the heat shield (104) and the EGP (111).

Fig. 3 illustrates a schematic view of the exhaust cooling system (100) of the internal combustion engine (200) (shown in Fig.2), in accordance with an embodiment of the present disclosure. As illustrated, the exhaust cooling system (100) includes the exhaust gas processor (EGP) (111), the heat shield (104) mounted on the exhaust gas processor (EGP) (111), In an embodiment, the heat shield (104) is mounted to EGP (111) through the bracket member (107) (shown in Fig. 1 and Fig 2). The bracket member (107) is adapted to mount the one or more electronic components (110) in at least a portion thereof. The one or more electronic components are configured to generate one or more input signals based on the at least one engine operating parameters.
As per an embodiment of the present invention, the exhaust cooling system (100) further includes the air tank (101) positioned offset from the heat shield (104), the valve device (103) communicatively connected to the air tank (101), the control unit (305) and the override switch (306).In an embodiment, the valve device (103) is a solenoid valve being electrically operated by a solenoid valve operating device (300) in response to one or more control signals from the control unit when the at least one engine operating parameter exceeds the predetermined level. The valve device (103) is electrically connected to the solenoid valve operating device (300) through an elongated member (304) such as wire. In an embodiment, coils (303) surrounding the valve device (103) energizes the solenoid upon actuation to communicate with air tank (101). The valve device (103) is packaged on the vehicle frame (not shown).
In an embodiment, at a non-override condition, the control unit (305) is configured to actuate the valve device (103) to permit the compressed air supply from the air tank (101) along the flow path (201). The flow-path (201) is defined between the heat shield (104) and the EGP (111) when at least one engine operating parameter exceeds a predefined threshold limit. In an embodiment, the at least one engine operating parameter including an engine RPM exceeding a predetermined RPM level such that an exceeded RPM level equals to a maximum engine power RPM

value. In other embodiment, at least one engine operating parameter includes a surface temperature of the EGP exceeding the predetermined level. Further, at the override condition, the override switch (306) is activated manually to actuate the valve device (103) to permit the compressed air supply from the air tank (101) along the flow path (201) defined between the heat shield (104) and the EGP (111) during at least one engine non-start condition. In an embodiment, the override switch (306) is activated during the at least one engine non-start condition including an engine idle speed condition at a forced regeneration mode. In other embodiment, the override switch (306) is activated during the at least one engine non-start condition including the failure detection condition. The failure detection condition occurs when at least one sensor of EGP (111) fails to communicate with the control unit (305).
Further, as illustrated, the air tank (101) includes a plurality of air branched pipes (108) stretching out from the at least a portion thereof. In an illustration, each of the plurality of the air branched pipes (108) comprises the pneumatic air nozzle (202) configured to provide compressed air jets along the flow-path (201). In an illustrated embodiment, the plurality of the air branched pipes (108) are mounted on the vehicle frame (not shown) through a mounting bracket (301). In an illustration, the flow path (201) is defined as a flow-direction of the compressed air from a vehicle front (F) to a vehicle rear (R) direction. This facilitates heat dissipation to outside (307), thereby providing enhanced cooling and an improved performance of EGP.
Fig. 4 is a flow-chart (400) of a method illustrating an automatic actuation of the valve device (103) at the non-override condition, in accordance with an embodiment of the present disclosure. In an embodiment, the non-override condition corresponds to the at least one engine operating parameters. Thus, at non-override condition, the control unit (305) actuates the valve device (103) when the at least one engine operating parameter exceeds the predefined threshold limit. In

an embodiment, the at least one engine operating parameter includes, but not limited to, an engine RPM, a EGP surface temperature.
With reference to an illustration, once the ignition of the vehicle is in the ON condition, an engine speed sensor (not shown) determines if an engine RPM level equals to a maximum engine power RPM value, at step 401. At step 402, a temperature sensor (not shown) determines if the EGP surface temperature is above a predetermined level. If the engine RPM level equals to a maximum engine power RPM value and if the EGP surface temperature is above the predetermined level, the control unit (305) actuates the valve device (103), at step 403. At step 404, upon actuation of valve device, the compressed air supply is directed from the air tank (101) along the flow-path (201) (shown in Figure 1) defined between the heat shield (104) and the EGP (111). At step 405, the compressed air supply at a predetermined speed along the flow-path (201) facilitates an efficient dissipation of heat that is generated and trapped between the heat shield (104) and the EGP (111) when the at least one engine operating parameter exceeds the predefined threshold limit. In an embodiment, the predetermined speed of the compressed air is higher than a vehicle maximum speed.
It should be imperative that the construction and configuration of the device, the system and any other elements or components described in the above detailed description should not be considered as a limitation with respect to the figures. Rather, variation to such structural configuration of the elements or components should be considered within the scope of the detailed description.
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:

Reference Number Description
100 Exhaust Cooling System
101 Air Tank
101a, 101b Mounting brackets
102 Connecting pipe
103 Valve device
104 Heat Shield
105 Second exhaust pipe
106 First exhaust pipe
107 Bracket member
108 Air branched pipelines
109 Exhaust port
110 One or more electronic components
111 Exhaust Gas Pipe (EGP)
200 Internal Combustion Engine
201 Flow-path
202 Pneumatic nozzle
300 Solenoid valve operating device
301 Mounting member
302 Valve mounting bracket
303 Coil
304 Elongated member
305 Control unit
306 Override Switch
307 Heat dissipation to Outside
400 Method flow chart
401-405 Flow-chart steps

We Claim:
1. An exhaust cooling system (100) for an internal combustion engine (200), the
system (100) comprising:
an exhaust gas processor (EGP) (111) for processing an exhaust-gas; a heat shield (104) mounted on the exhaust gas processor (EGP) (111); an air tank (101) positioned offset from the heat shield (104) and the EGP (111), the air tank (101) configured for storing compressed air;
a valve device (103) communicatively connected to the air tank (101); a control unit (305) in response to a non-override condition configured to actuate the valve device (103) to permit a compressed air supply from the air tank (101) along a flow-path (201) defined between the heat shield (104) and the EGP (111) when at least one engine operating parameter exceeds a predefined threshold limit; and
an override switch (306) in response to an override condition activated to actuate the valve device (103) to permit the compressed air supply from the air tank (101) along the flow- path (201) defined between the heat shield (104) and the EGP (111) during at least one engine non-start condition.
2. The system (100) as claimed in claim 1, wherein the air tank (101) is disposed so as to be located at a position offset laterally from the heat shield (104) and EGP (111).
3. The system (100) as clamed in claim 1, wherein the valve device (103) is a solenoid valve being electrically operated by a solenoid valve operating device (300) in response to one or more control signals from the control unit (305) when the at least one engine operating parameter exceeds the predetermined level.
4. The system (100) as claimed in claim 1, wherein the air tank (101) includes a plurality of air branched pipes (108) stretching out from at least a portion thereof

and extending along a longitudinal axis (AA) and then downwardly from the longitudinal axis (AA) along a lateral axis (BB) of the EGP (111).
5. The system (100) as claimed in claim 1, wherein each of the plurality of air branched pipes (108) comprises a pneumatic air nozzle (202) configured to provide compressed air jets along the flow-path (201).
6. The system (100) as claimed in claim 1 or claim 5, the flow path is defined as a flow-direction of the compressed air in a predetermined gap between the heat shield (104) and EGP (111).
7. The system (100) as claimed in claim1, wherein the compressed air is stored at atmospheric temperature condition.
8. The system (100) as claimed in claim1, wherein the non-override condition is determined when the control unit (305) is configured to receive a plurality of signals corresponding to at least one engine operating parameter.
9. The system (100) as claimed in claim 1, wherein the control unit (305) in response to the non-override condition actuates the valve device (103) when the at least one engine operating parameter including an engine RPM exceeding a predetermined RPM level such that an exceeded RPM level equals to a maximum engine power RPM value.
10. The system (100) as claimed in claim 1, wherein the control unit (305) in response to the non-override condition actuates the valve device (103) when the at least one engine operating parameter including a surface temperature of the EGP (111) exceeds the predetermined level.
11. The system (100) as claimed in claim 1, wherein the override condition is determined during the at least one engine non-start condition.

12. The system (100) as claimed in claim 1, wherein the override switch (306) is activated during the at least one engine non-start condition including an engine idle speed condition at a forced regeneration mode.
13. The system (100) as claimed in claim 1, wherein the override switch (306) is activated during the at least one engine non-start condition including a failure detection condition; wherein failure detection condition occurs when at least one sensor of EGP (111) fails to communicate with the control unit (305).
14. A method of cooling an exhaust system for an internal combustion engine (200), the method comprising:
providing an exhaust gas processor (EGP) (111) for processing an exhaust-gas; mounting a heat shield (104) on the exhaust gas processor (EGP) (111); disposing an air tank (101) offset from a heat shield (104) and an exhaust gas processor (EGP) (111), the air tank (101) configured for storing compressed air, connecting a valve device (103) to the air tank (101),
actuating, by a control unit (305), in response non-override condition the valve device (103) to permit a compressed air supply from the air tank (101) along a flow path defined between the heat shield and the EGP (111) when at least one engine operating parameter exceeds a predetermined level; and
actuating, by an override switch (306) upon activation, at override condition the valve device (103) to permit the compressed air supply from the air tank (101) along the flow path defined between the heat shield (104) and the EGP (111) during at least one engine non-start condition.
15. The method as claimed in claim 14, wherein the step of actuating the valve
device to permit a compressed air supply from the air tank (101) along a flow
path defined between the heat shield (104) and the EGP (111) comprising:
actuating, by the control unit, the valve device (103) when the at least one
engine operating parameter including an engine RPM exceeds a predetermined
RPM level such that an exceeded RPM level equals to a maximum engine RPM

value.
16. The method as claimed in claim 14, wherein the step of actuating the valve device to permit a compressed air supply from the air tank (101) along a flow path defined between the heat shield (104) and the EGP (111) comprising: actuating, by the control unit, the valve device (103) when the at least one engine operating parameter including an exhaust gas temperature exceeds the predetermined level.
17. The method as claimed in claim 14, wherein the override switch (306) is activated during the at least one engine non-start condition including an engine idle speed condition at a forced regeneration mode.
18. The method as claimed in claim 14, wherein the override switch (306) is activated during the at least one engine non-start condition including a failure detection condition; wherein failure detection condition occurs when at least one sensor of EGP (111) fails to communicate with the control unit (305).