DESC:[001] The present disclosure generally relates to a cooling system. More particularly, the present disclosure relates to a cooling system to reduce urea injector tip temperature in the phase of exhaust after treatment system (EATS) and method of manufacturing thereof.
[002] The implementation of BSVI norms in the automobile industries has created a challenging opportunity to reduce the NOx from exhaust gases of the heavy diesel vehicle exhaust after treatment systems (EATS). Further to minimize NOx, a chemical reaction occurs in EATS with the help of liquid urea injection. The utilization of liquid urea reduces the NOx by the ways of converting into N2 and H2O, because NOx is a harmless and not suitable for healthy environmental condition. Further liquid urea solution popularly also known as Ad-blue is added with the help of a very fine hole injector into EATS. The Ad-blue spray happens when the vehicle is in running condition. The injected Ad-blue solution is usually sprayed at a temperature of 200 centigrade. Hence the higher temperature of exhaust gases doesn’t affect the injector internal parts in working condition.
[003] But during the engine shut down condition; the temperature of exhaust gas goes high and urea dosing is not functional resulting into sudden rise of urea injector tip temperature. Therefore, due to high exhaust gas temperature, the injector components get heated and this result into melting of rubber seal inside injector. The immediate solution to control the injector temperature is under control is by using a liquid coolant. However, the conventional engine coolant used to cool injector requires a separate complex & expensive circuit and also the water-cooling circuits comprising a moving part such as pumps, wherein the pumps performance get deteriorates over time. The higher maintenance and replacement cost of injector or coolant system parts hinders the vehicle functioning and make complete system complex and a costly affair.
[004] Therefore, there is an unmet need of cost effective, simple, user friendly and easily retraceable cooling system instead of above-mentioned complex and costly cooling system to reduce Urea injector tip temperature in Exhaust After Treatment System (EATS).
[005] The present invention relates to a cost effective, simple, user friendly and easily retraceable cooling system and method of manufacturing thereof.
[006] The present subject matter discloses a retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) comprising an injector housing with slots for air supply tubes, which get activated by sensor working in synchronous manner with injector dosing, thereby injected air reduces the high temperature of the exhaust gas present in the system, hence reducing the injector tip temperature, and an automatic activation system to control the flow of dosing depend upon the injector temperature.
[007] Here the existing ambient air available in compressed air cylinders of the vehicle act as coolant, thereby no need to have additional coolant like existing system leads to increase the cost of the vehicle. The ambient air of the vehicle mixed into the exhaust gases, which immediately drops the temperature nearby injector. Further the cooling jacket for injector through which engine coolant is circulated and the air tube circuit attached with compressed air container already present in the vehicle. Thereby the existing air supply prevents direct contact of exhaust air with injector avoiding possible failures.
[008] The present subject matter also discloses a process to reduce urea injector tip temperature exhaust after treatment system (EATS), wherein injector mounting with groves to facilitate air supply connected with one main inlet. Further the sensor to work in synchronous with urea dosing sensor for ultimately automatic valve or switch for turning on air supply to connecting tube assembly to compressed air container.
[009] The cooling system of present invention comprising an injector housing with slots for air supply tubes, which get activated by sensor working in synchronous manner with injector dosing. The injected air reduces the high temperature of the exhaust gas present in the system, hence reducing the injector tip temperature. The moment dosing stops’ and injector temperature starts to rise the air supply gets activated automatically. Supplied air dilutes the exhaust air around the injector and stabilizes the injector temperature by a considerable amount. The instant prevention of the possibility of high temperature improves the life of injector components and also reduces the outlet temperature of exhaust air during shutdowns.
[0010] The coolant of present invention replaced by inexpensive ambient air which is already available in compressed air cylinders in the vehicle. Instead of using a coolant the ambient air is mixed into the exhaust gases which immediately drops the temperature nearby injector.
[0011] The present invention also provides a process wherein injector mounting with groves to facilitate air supply connected with one main inlet. Further the sensor to work in synchronous with urea dosing sensor for ultimately automatic valve/switch for turning on air supply to connecting tube assembly to compressed air container.
[0012] In one embodiment, the present subject matter discloses a cooling jacket for injector through which engine coolant is circulated. It requires its own circuit, sensor, pump and cooling jacket. Our solution provides an inexpensive and highly effective cooling approach of injector without depending on engine coolant. Our solution ensures an immediate temperature drop as the colder fluid is directly mixed with the exhaust gases not through a water jacket.
[0013] In another embodiment, the setup contains only air tube circuit attached with compressed air container already present in the vehicle. Further air supply prevents direct contact of exhaust air with injector avoiding possible failures.
[0014] Here the system is present invention is reliable in reducing injector temperature with immediate effect, no moving parts involve and low maintenance/replacement cost, wherein free ambient air is used as cooling fluid
[0015] The cooling system of present invention may be applied to various models of vehicles to not just various vehicle, where mixing of air with working fluid doesn’t impact performance of component. Here ambient air will always be at lower temperature than engine air hence diluting exhaust with ambient air reduces the exhaust exit temperature posing less threat to outer components near exhaust release.

BRIEF DESCRIPTION OF DRAWINGS
[0016] Aspects of the present disclosure are illustrated by way of example(s), and not by way of limitation, in the accompanying drawings, wherein:
[0017] FIG. 1 is a schematic diagram of injector housing with air supply tubes
[0018] FIG. 2 shows an injector placement in exhaust after treatment system (EATS).
[0019] FIG. 3 shows an Injector housing with air supply tube inlets and highlighted various parts or components.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0020] The present invention belongs to the field of a cooling system to reduce urea injector tip temperature in Exhaust After Treatment System (EATS) applicable to all type of vehicles, in particularly commercial vehicles. More particularly it relates to a cooling system to reduce Urea injector tip temperature in Exhaust After Treatment System (EATS) and method of manufacturing thereof.
[0021] Referring to FIG. 1 illustrated a schematic diagram of injector housing with air supply tubes in a slot manner. The air supply tubes get activated by sensor working in synchronous manner with injector dosing. The injected air reduces the high temperature of the exhaust gas present in the system, hence reducing the injector tip temperature. The moment dosing stops and injector temperature starts to rise the air supply gets activated automatically. Supplied air dilutes the exhaust air around the injector and stabilizes the injector temperature by a considerable amount. The instant prevention of the possibility of high temperature improves the life of injector components and also reduces the outlet temperature of exhaust air during shutdowns.
[0022] Referring to the FIG. 2 illustrated an injector placement in Exhaust After Treatment System (EATS).
[0023] Referring to the FIG. 3 illustrated an Injector housing with air supply tube inlets and highlighted various parts or components. Here the injector mounting with groves to facilitate air supply connected with one main inlet. Further the sensor to work in synchronous with urea dosing sensor for ultimately automatic valve/switch for turning on air supply to connecting tube assembly to compressed air container.
[0024] It is to be understood that other embodiments of the present disclosure will become readily apparent to those skilled in the art from the following detailed description, wherein it is shown and described only various embodiments of the disclosure by way of illustration. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
[0025] Although the present disclosure is described in terms of certain preferred embodiments and examples, other embodiments and examples will be apparent to those of ordinary skill in the art, given the benefit of this disclosure, including embodiments and examples that do not provide all of the benefits and features set forth herein, which are also within the scope of this disclosure. It is to be understood that other embodiments may be utilized, without departing from the true spirit and scope of the present invention.
[0026] It would become abundantly clear to a person in the art, after reading this specification that the present subject matter also provides a retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) and operation thereof and method of construction thereof. More specifically, the present subject matter discloses a retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) thereof effectively and without departing from the spirit of the present subject matter. While the subject matter may be susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and have been described herein. Alternate embodiments or modifications may be practiced without departing from the spirit of the present subject matter. The drawings shown are schematic drawings and may not be to the scale. While the drawings show some features of the subject matter, some features may be omitted. Alternatively, in some other cases some features may be emphasized while others are not. Further, the methods disclosed herein may be performed in manner and/or order in which the methods are explained. Alternatively, the methods may be performed in manner or order different than what is explained without departing from the spirit of the present subject matter. It should be understood that the subject matter is not intended to be limited to the particular forms disclosed. Rather, the subject matter is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the subject matter.

Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)
,CLAIMS:We claim:

1) A retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) comprising:
a) an injector housing with slots for air supply tubes, which get activated by sensor working in synchronous manner with injector dosing, thereby injected air reduces the high temperature of the exhaust gas present in the system, hence reducing the injector tip temperature;
b) an automatic activation system to control the flow of dosing depend upon the injector temperature;
c) an ambient air available in compressed air cylinders of the vehicle act as coolant, wherein the ambient air is mixed into the exhaust gases, which immediately drops the temperature nearby injector;
d) a cooling jacket for injector through which engine coolant is circulated; and
e) an air tube circuit attached with compressed air container already present in the vehicle. Further air supply prevents direct contact of exhaust air with injector avoiding possible failures.
2) The retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) as claimed in claim 1, wherein said system further comprises a circuit, a sensor, a pump in addition to said cooling jacket to provide optimal cooling approach of injector without depending on engine coolant.
3) The retraceable cooling system to reduce urea injector tip temperature exhaust after treatment system (EATS) as claimed in claim 1, wherein said automatic activation system to control the flow of dosing by the way of the moment dosing stops and injector temperature starts to rise the air supply gets activated automatically.
4) A process to reduce urea injector tip temperature exhaust after treatment system (EATS) as claimed in claim 1, wherein injector mounting with groves to facilitate air supply connected with one main inlet. Further the sensor to work in synchronous with urea dosing sensor for ultimately automatic valve/switch for turning on air supply to connecting tube assembly to compressed air container.

Yours Faithfully

ANIL KUMAR PANDEY
(IN P/A 2359)
AGENT FOR THE APPLICANT(S)