BACKGROUND
[0001] Engine cooling system is employed to remove heat from an internal combustion (IC) engine to ensure proper functioning of the IC engine. The engine cooling system, based on a type of cooling medium, can be an air cooling system and a liquid cooling system. Generally, the air cooling system includes a set of fins around a cylinder head and cylinder block of the IC engine that increases a surface area through which the heat may be dissipated to the air that flows over the fins. In case of the liquid cooling system, the IC engine includes a set of channels inside the cylinder block in which a coolant is circulated that absorbs the heat from the IC engine. In addition, the liquid cooling system includes a heat exchanger that receives the hot coolant from the IC engine and dissipates the heat from the hot coolant to air flowing through the radiator unit. The coolant cooled by the radiator unit is circulated back into the IC engine to again absorb the heat. Further, hot air after absorbing heat from the radiator unit is discharge out of the vehicle.
BRIEF DESCRIPTION OF DRAWINGS
[0001] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference like features and components.
[0002] Fig. 1 illustrates a side of a vehicle having a cooling assembly, in accordance with one implementation of the present subject matter;
[0003] Fig. 2 illustrates a perspective view of an engine compartment when viewed from front of the vehicle;
[0004] Fig. 3 illustrates a perspective view of the engine compartment when view from a rear of the vehicle;

[0005] Fig. 4 illustrates a perspective view of an arrangement of the cooling assembly in the engine compartment when viewed from front of the vehicle
[0006] Fig. 5 illustrates a perspective view of the arrangement of the cooling assembly in the engine compartment when view from a rear of the vehicle.
DETAILED DESCRIPTION
[0007] Conventionally, in case of a front mounted engine vehicle, where the IC engine is air cooled, the fins receives constant flow of air over the fins and accordingly, heat from the IC engine is dissipated. On the other hand, in case where the IC engine is liquid cooled, the radiator unit is installed in the front of the vehicle and the radiator unit constantly receives air flow to remove heat from the hot coolant. Also, constant flow of air also facilitates in discharge of hot air from the IC engine compartment thereby preventing increase in temperature around the IC engine. However, in case of a rear mounted engine vehicle, the flow of air for cooling is less and as a result, the amount of heat dissipated through the fins is not constant. For instance, in case of the liquid cooled engine, the amount of air flowing into the radiator unit may not be constant. Moreover, since there is no constant flow, the hot air tends to re-circulate in the IC engine compartment thereby increasing temperature around the IC engine. Further, increase in the temperature around the IC engine effects the performance of the IC engine. Accordingly, the amount of heat dissipated from the coolant is not constant and thus the cooling of the engine is not achieved adequately.
[0008] To this end, the present subject matter provides a system for providing cooling to rear mounted engine in a vehicle. The system based on the present subject matter provide a pre-defined flow path for the air to ensure constant heat dissipation from the IC engine while at the same time prevent re-circulation of hot air in the engine compartment to prevent increase in temperature around the IC engine.
[0009] According to an aspect, the cooling assembly for dissipating heat from the IC engine may include a radiator unit installed in an engine compartment where the IC

engine is installed. Further, the radiator unit may include a plurality of passageways that allows a hot exhaust coolant to flow therethrough. In addition, the cooling assembly may include a set of deflectors that directs the air towards the radiator unit of the IC engine and also prevents re-circulation of hot air around the IC engine. In one example, the cooling assembly may include a first deflector that directs the air into the engine compartment towards the plurality of passageway to absorb heat from the hot exhaust coolant therein. In one example, the first deflector may provide a pre-defined flow path to the air flowing towards the radiator unit. The cooling assembly may also include second deflector that prevents the air carrying heat from the hot exhaust coolant coming from the radiator unit to get re-circulated into the engine compartment.
[0010] The cooling assembly provides both air to the radiator unit and expels the hot air out of the engine compartment thereby improving the cooling efficiency of the cooling assembly. In addition, the cooling assembly also prevents hot air re-circulation in the engine compartment. Since hot air does not accumulate inside the engine compartment, the performance of the IC engine does not get affected. Moreover, since the operation of IC engine is kept at normal temperature conditions, the operational life of the IC engine and associated components is also increased.
[0011] These and other advantages of the present subject matter would be described in greater detail in conjunction with the following figures. While aspects of cooling assembly can be implemented in any number of different configurations, the embodiments are described in the context of the following device(s) and method(s).
[0012] Fig. 1 illustrates a vehicle 100, in accordance with one implementation of the present subject matter. In one example, the vehicle 100, can a three-wheeled vehicle or a four-wheeled vehicle. Further, the vehicle 100 can be a rear-engine vehicle or a middle engine vehicle. The rear engine vehicle may be understood as a vehicle in which a centre of gravity of the engine is behind the rear axle of the vehicle. The vehicle 100 may include an engine compartment 102 positioned at a rear of the vehicle 100. In the illustrated example, the engine compartment 102 may be positioned just below a rear

passenger seat 104 inside the vehicle 100. The engine compartment 102 may house an IC engine 106 that may power the vehicle 100. In addition, the engine compartment 102 may house an IC engine 106 that drives rear wheels 108 of the vehicle 100. In an example, IC engine 106 can be a liquid cooled engine and may have a plurality of cooling jackets through the IC engine's block and cylinder head to allow a coolant to flow therein to extract the heat from the IC engine 106.
[0013] According to an example, the engine compartment 110 may house a cooling assembly 110 that may be employed to cool the IC engine 106. In one example, the cooling assembly 110 may perform two tasks. First, the cooling assembly 110 may extract heat of the IC engine 106 through the coolant and discharge the extracted heat to atmosphere. Second, the cooling assembly 110 may direct atmospheric air into the engine compartment 102 so as to discharge the heat from the coolant and to prevent the hot air from re-circulating in the engine compartment 102. A manner by which the cooling assembly 110 operates is explained in subsequent paragraphs.
[0014] Fig. 2 and 3 illustrate different views of the engine compartment 102, in accordance with one implementation of the present subject matter. Fig. 2 illustrates a perspective view of the engine compartment 102 when viewed from front while Fig. 3 illustrates a perspective view of the engine compartment 102 when view from a rear of the vehicle 100. In the illustrated example, the engine compartment 102 may be formed inside a body 202 (shown by dotted lines) of the vehicle 100. Further, the engine compartment 102 may also include other components, such as rear wheels 108, a suspension system 204, axles that transmits the power from a transmission box to the rear wheels 108.
[0015] According to an example, the cooling assembly 110 may include a radiator unit 206 that may be installed inside the engine compartment 102. In one example, the radiator unit 206 can be installed adjacent the IC engine 106. The radiator unit 206 may be responsible to discharge heat from the coolant that flows out from the engine's cooling jacket. Further, the radiator unit 206 may circulate the coolant in the IC engine

106 for cooling the IC engine 106. The radiator unit 206 may include a plurality of passageway for the coolant to allow the hot exhaust coolant from the engine to flow therethrough. In addition, the radiator unit 206 may discharge air that has gained heat from the coolant.
[0016] According to an example, the cooling assembly 110 may include a first deflector 208 that may be installed inside the engine compartment 102. In one example, the first deflector 208 may installed on the body 202 of the vehicle. In another example, the first deflector 208 may be mounted on the IC engine 106. As may be understood, the first deflector 208 may be mounted to any component as long as a mounting fixedly secures the first deflector 208 inside the engine compartment 102. The first deflector 208 may include a first deflection surface 208-1 that may direct the atmospheric air flowing underneath the toward the passageways of the radiator unit 206. In the illustrated example, the first deflector 208 may be positioned at an angle with reference to a floor of the body 202 to deflect the air flowing underneath the vehicle 100 towards the radiator unit 206. Further, the angle of first deflector 208 can vary from 0 degree to 90 degrees based on various factors, such as amount of air to be directed, relative position of the radiator unit 206 of the radiator unit 206. Although the present example illustrates that the first deflector 208 directs the atmospheric air from underneath the vehicle to the radiator unit 206, the first deflector 208 may be installed at an orientation so as to direct the atmospheric air flowing from side of the vehicle 100. In addition to directing the atmospheric air towards the radiator unit 206, the first deflector 208 may also acts as a splash guard that prevents muds or debris from entering into the engine compartment 102. In other words, the first deflector 208 also protects the radiator unit 206 from the mud that can enter in the radiator unit 206 and can affect a heat dissipation capacity of the radiator unit 206.
[0017] According to an example, the cooling assembly 110 may also include a second deflector 210 installed in the engine compartment 102. As illustrated in Fig. 3, the second deflector 210 may be fixedly secured below the radiator unit 206. The

second deflector 210, in operation, prevents air carrying heat from the hot exhaust coolant from re-circulating into the engine compartment 102. The second deflector 210 may act as a barrier that prevent the air carrying heat from re-entering into the engine compartment 102. Therefore, a temperature inside the engine compartment 102 can be maintained. Moreover, preventing re-circulation of the hot air ensures intake of cold air from underneath of the vehicle 100 to maintain constant heat removal from the radiator unit 206.
[0018] The cooling assembly 110 may also include additional components that are explained with respect to Fig.3 and Fig. 4.
[0019] Fig. 3 and Fig. 4 illustrate an arrangement 300 of the radiator unit 206 and the IC engine 106, in accordance with one implementation of the present subject matter. The arrangement 300 illustrates components that are explained with respect to Fig. 2 and 3 and hence will not be described in detail again. The arrangement 300 illustrates additional components of the cooling assembly 110. For instance, the cooling assembly 110 may include hoses 302 that connects the radiator unit 206 to the cooling jackets of the IC engine 106. In addition, the cooling assembly 110 may also include a pump 304 to circulate the coolant through the cooling jackets of the IC engine 106. In addition, the radiator unit 206 may include a fan 306 that may create a draught to pull the air into the radiator unit 206 so that the air may contact the passageway to absorb the heat therefrom.
[0020] With reference to flow of air as denoted by arrow A1, the first deflector 208 may installed upstream with respect to the radiator unit 206, such that the air is directed towards the radiator unit 206. Further, the second deflector 210 may installed downstream with respect to the radiator unit 206, such that hot air exiting from the radiator unit 206 are directed towards the second deflector 210 and are blocked by the second deflector 210 from re-entering the engine compartment 102. Further, in an example, the first deflector 208 and second deflector 210 can be made from a wide range of material, such as, but not limited to, metal, alloys, polymer, or the like.

[0021] The operation of the cooling assembly 110 will now be described. During the motion of the vehicle 100, the air flow underneath the vehicle 100. As the air flows underneath the vehicle 100, a portion of the flowing air strikes the first deflector 208. Since the first deflector 208 is inclined, the air is deflected towards the radiator unit 206. In one example, the air may flow over the first deflection surface 208-1 towards the radiator unit 206. Once the air reaches the radiator unit 206, the air passes through the radiator unit 206 and comes in contact with an outer surface of the passageways that carries the hot coolant coming from the IC engine 106. Here, the air absorbs the heat and is expelled from the back of the radiator unit 206. Further, the air carrying the heat from the coolant exiting from the radiator unit 206 may get diverted to re-enter the engine compartment 102. However, the second deflector 210 prevents the hot air from the re-entering the engine compartment 102. As a result, the temperature of the engine compartment is prevented from rising and the IC engine 106 can be cooled efficiently.
[0022] Although the subject matter has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the subject matter, will become apparent to persons skilled in the art upon reference to the description of the subject matter. It is therefore contemplated that such modifications can be made without departing from the scope of the present subject matter as defined.

I/ We claim:
1. A cooling assembly (110) for an internal combustion (IC) engine installed in an engine compartment (102) of a vehicle (100), the cooling assembly (110) )# comprising:
a radiator unit (206) installed in the engine compartment (102) adjacent to the
IC engine (106) to receive coolant in the IC engine (106) for cooling the IC engine
(106), wherein the radiator unit (206) includes a plurality of passageways to allow a
hot exhaust coolant from the IC engine (106) to flow therethrough;
'&# a first deflector (208) to direct air into the engine compartment (102) towards
the plurality of passageways to absorb heat from the hot exhaust coolant therein; and
a second deflector (210) to prevent re-circulation of air carrying heat from the hot exhaust coolant into the engine compartment (102).
')# 2. The cooling assembly (110) as claimed in claim 1, wherein the IC engine (106) is mounted at a rear of the vehicle (100).
3. The cooling assembly (110) as claimed in claim 1, wherein the first deflector
(208) is placed upstream with respect to the radiator unit (206).
(&#
4. The cooling assembly (110) as claimed in claim 1, wherein the second deflector
(210) is placed downstream with respect to the radiator unit (206).
5. The cooling assembly (110) as claimed in claim 1, wherein the first deflector
()# (208) is to deflect air flowing underneath the vehicle (100).
6. The cooling assembly (110) as claimed in claim 1, wherein the first deflector
(208) is inclined with respect to a floor of the vehicle (100).

7. The cooling assembly (110) as claimed in claim 6, wherein the first deflector
(208) is inclined at angle ranging from about 10 degrees to about 90 degrees with
respect to the floor of the vehicle (100).
)#
8. A vehicle (100) comprising:
an IC engine (106) mounted in an engine compartment (102) of the vehicle (100);
a cooling assembly (110) comprising:
'&# a radiator unit (206) installed in the engine compartment (102) adjacent
to the IC engine (106) to receive coolant in the IC engine (106) for cooling the IC engine (106), wherein the radiator unit (206) includes a plurality of passageways to allow a hot exhaust coolant from the IC engine (106) to flow therethrough;
')# a first deflector (208) placed upstream with respect to the radiator unit
(206) to direct air into the engine compartment (102) towards the plurality of passageways to absorb heat from the hot exhaust coolant therein, wherein the radiator unit (206) is to expel the air carrying heat from the hot exhaust coolant; and
(&# a second deflector (210) placed downstream with respect to radiator unit
(206) isolate the engine compartment (102) from the expelled heat carrying air.
9. The vehicle (100) as claimed in claim 8, wherein the IC engine (106) is mounted
at a rear of the vehicle (100).
()#
10. The vehicle (100) as claimed in claim 8, wherein the first deflector (208) is to
deflect air flowing underneath the vehicle (100).

11. The vehicle (100) as claimed in claim 8, wherein the first deflector (208) is inclined with respect to a floor of the vehicle (100).
12. The vehicle (100) as claimed in claim 11, wherein the first deflector (208) is inclined at angle ranging from about 10 degrees to about 90 degrees with respect to the floor of the vehicle (100).
13. The vehicle (100) as claimed in claim 8, wherein the vehicle (100) further comprises a tail door to allow egress of air carrying heat from the vehicle (100).