DESC:TECHNICAL FIELD
[0001] The present invention relates generally to a two or three wheeled saddle type vehicle. More particularly, the present invention relates to a cooling system employed to cool the internal combustion engine of the saddle type vehicle.
BACKGROUND
[0002] An internal combustion engine converts thermal energy obtained from burning of a fuel with an oxidizer (air) into mechanical energy, which can be employed to do a wide variety of mechanical work. It is used in a wide range of applications including providing motive force for movement of an automobile. One such type of automobile powered by an internal combustion engine is a step-through type two-wheeled vehicle, colloquially called scooter. The main parts of the internal combustion engine include a cylinder head, a reciprocating piston on a cylinder block and a connecting rod which connects the piston to the reciprocating crankshaft. During operation of the internal combustion engine, the burning of fuel and oxidizer occurs in the cylinder block and transfers mechanical energy to the reciprocating piston. This operation generates lot of thermal energy in and around the cylinder block. This thermal energy increases the temperature of the cylinder block and the atmospheric air surrounding it. Hence, it is necessary to cool the cylinder block, its associated components and the surrounding air.
[0003] IC engines of saddle type vehicle such as scooter usually employ an air cooling system which enables cooling of the engine assembly or the cylinder block to be particular. Generally, the air cooling system comprises of a cooling fan operably connected to the crankshaft, an air cooling inlet and a shroud assembly. The shroud assembly covers the entire internal combustion engine, such that the air sucked in by the cooling fan is re-circulated around the shroud to cool down the hot zones of the internal combustion engine. The air cooling intake is formed above the cooling fan enabling an entrance for atmospheric air which is sucked in by the cooling fan and re-circulated for an efficient working of the air cooling system. In furtherance to it, a deflector is provided in an opposite portion of the shroud where the air cooling intake is formed, which enables an efficient recirculation of air in the opposite portion as well.
[0004] However, the main concern present in the above described system is the direction of air being sucked in by the air cooling system. The direction of the air which is sucked in with the help of the cooling fan is normally not uniform or straight. The direction of the air also follows the line of pressure difference around the air cooling inlet where the cooling fan is running to suck in the air. The atmospheric air entering into the air cooling system through the air cooling inlet is in a distorted fashion. Due to such a pattern a larger amount of power is required by the cooling fan to suck in a substantial amount of air and circulate it. The excess amount of power required is because of the resistance for air to enter into the system because of the uneven directional entry pattern. To improve such a problem stated above some of the known air cooling systems attempted implementing a plate like structure in the air cooling inlet just above the cooling fan which is circular in shape. This plate was added to provide a uniform direction to the air entering such that less resistance is offered to intake of air and low power is required by the cooling fan to suck in and circulate that air. However, the above explained embodiment is not effective as the uneven pattern of air entry is not resolved. In furtherance to it, the atmospheric air after entering through the air cooling inlet gets stuck and collides around the corners of the air cooling inlet. Thus, the cooling fan has to make an extra effort to circulate the air which was getting stuck or colliding around the corners. This results in high power consumption by the cooling fan to draw in the air and circulate it.
[0005] Thus there is a need to provide a cooling system that is effective & efficient in cooling the power train of the vehicle. The present solution provides a cooling system in which a uniform direction is provided to the air entering such that resistance for the air to enter is reduced. In furtherance to it, the present subject matter reduces the power required by cooling fan to suck in and circulate the air, improves the air flow rate and engine temperatures.

BRIEF DESCRIPTION OF THE DRAWINGS
[0006] The detailed description is described with reference to the accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[0007] Fig. 1 illustrates a right side view of an exemplary two-wheeled vehicle, in accordance with an embodiment of the present subject matter.
[0008] Fig. 2 illustrates a right side view of a frame structure of the exemplary two-wheeled vehicle in accordance with an embodiment of the present subject matter.
[0009] Fig. 3 illustrates a side view of the internal combustion engine of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
[00010] Fig. 4 illustrates a front view of an air cooling inlet of an air cooling system of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
[00011] Fig. 5 (a) illustrates a top view of a conventional known air cooling inlet used the exemplary two-wheeled vehicle as shown in Fig. 1.
[00012] Fig. 5 (b) illustrates a top view of the air cooling inlet of the air cooling system of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
[00013] Fig. 6 illustrates a rear view of the air cooling inlet of the air cooling system of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
[00014] Fig. 7 illustrates an exploded view of the air cooling inlet and a second set of plate of the air cooling system of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
[00015] Fig. 8 illustrates a rear view of the air cooling inlet combined with the second set of plate of the air cooling system of the exemplary two-wheeled vehicle as shown in Fig. 1, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[00016] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder. According to an embodiment, the internal combustion engine described here operates in four cycles. Such an internal combustion engine is installed in a step through type two-or three wheeled saddle type vehicle. It is pertinent to note that the internal combustion engine may be mounted in vehicles in different arrangements such as in transverse and longitudinal fashion. However, in the ensuing description, such engine is transversely mounted at a lower portion of the step through type vehicle. It is contemplated that the concepts of the present invention may be applied to other types of vehicles within the spirit and scope of this invention. The detailed explanation of the constitution of parts other than the present invention which constitutes an essential part has been omitted at suitable places.
[00017] Generally, the internal combustion engine converts thermal energy obtained from burning of a fuel with an oxidizer (air) into mechanical energy, which can be employed to do a wide variety of mechanical work. It is used in a wide range of applications including providing motive force for movement of an automobile. Mostly, the internal combustion engine comprises of a cylinder head, a reciprocating piston on a cylinder block and a connecting rod which connects the piston to the reciprocating crankshaft. During operation of the internal combustion engine, the burning of fuel and oxidizer occurs in the cylinder block and transfers mechanical energy to the reciprocating piston.
[00018] Such an operation of the internal combustion engine requires burning of air-fuel mixture occurs in a combustion chamber formed between the cylinder head and the cylinder block. This operation generates lot of thermal energy in and around the cylinder head and cylinder block and increases the temperature of the space surrounding it. If this thermal energy is not dissipated, it may result in the failure of the cylinder head and cylinder block. Also, large temperature differences may lead to a distortion of the internal combustion engine components due to the thermal stresses set up. It is also seen that higher temperatures also lower the volumetric efficiency of the internal combustion engine. Hence, it is necessary to cool the cylinder block, its associated components and the surrounding air. Generally, a cooling system is required to cool the internal combustion engine components. In alternate power train systems like hybrid or electric tractor motor based power train system etc. a similar challenge exists of cooling the power train system of the vehicle. In vehicles using battery or fuel cell type energy storage devices, the cooling requirements also extend to these systems. Thus the necessity of cooling above mention systems in various forms of saddle type vehicle is imminent & is a challenge to overcome.
[00019] Typically, in a step-through type vehicle such as a scooter, a swinging internal combustion engine is located below the seat at a lower rear portion of the vehicle. The internal combustion engine is swingably supported by rear suspension system and attached to the frame of the vehicle. Cylinder block of such internal combustion engines are enclosed and are heated up during their operation. Thus, to provide an enhanced air cooling to the internal combustion engine a forced air cooling system is provided. In this system, atmospheric air is drawn inside the cooling system through a cooling fan from the outer atmosphere and re-circulated to cool down the hot zones of the internal combustion engine. Generally, the air cooling system comprises of a cooling fan operably connected to the crankshaft, an air cooling inlet and a shroud assembly. The shroud assembly covers the entire internal combustion engine, such that the air sucked in by the cooling fan is re-circulated around the shroud assembly to cool down the hot zones of the internal combustion engine. The air cooling intake is formed above the cooling fan enabling an entrance for atmospheric air which is sucked in by the cooling fan and re-circulated for an efficient working of the air cooling system. In furtherance to it, a deflector is provided in an opposite portion of the shroud where the air cooling intake is formed, which enables an efficient recirculation of air in the opposite portion as well.
[00020] However, the air cooling system always faces high resistance by the air entering in the system. This phenomenon is generally caused due to the uneven and zigzag direction followed by the air while entering the system. This happens because of the pressure difference present, and the atmospheric air also flows in a path as per that pressure difference, leading in an uneven pattern and zigzag direction of entry of air. The air entering into the air cooling system through the air cooling inlet is generally distorted and does not follow an even pattern. Generally, any other air cooling system tries to reduce its power consumption required to circulate the atmospheric air entering in. However, with the distorted path taken by the atmospheric air while entering makes it difficult to reduce the power being consumed. In addition to it, even after entering inside the atmospheric air gets stuck around the corners, which makes it even difficult to extract and circulate it which is undesirable.
[00021] The present invention aims to address all of the above drawbacks by providing a design in the air cooling system which provide a uniform and a straight direction to the air being sucked and entering in the system. The present subject matter aims to provide an air cooling system in which the power required by the cooling fan to suck in the required air is less resulting in higher fan efficiency. In furtherance to it the present subject matter aims to reduce the resistance for the air entering in, and improve the air flow rate and the powertrain & / or energy storage unit temperature.
[00022] In an embodiment in accordance with the present subject matter, a scooter type vehicle is provided with an air cooling system having an efficient opening for entry of substantial amount of air in the system to cool the internal combustion engine. Atmospheric air enters in the air cooling system through an opening formed in an air cooling inlet disposed on the shroud assembly. A cooling fan being operated by the crankshaft recirculates it to cool down the hot regions of the internal combustion engine.
[00023] However, as mentioned earlier the direction of the air being sucked and entering is not even or straight. In an embodiment, the air cooling inlet is provided with a first set of plate in an opening of the air cooling inlet placed just above the cooling fan. The function of the first set of plate is to channelise the air which is entering such that less power is required by the cooling fan to suck it in. The first set of plate comprises of a honeycomb structured grill which has evenly placed openings to provide a straight and uniform direction to the air which is entering in. It eliminates the random uneven and zigzag direction followed by the air which was entering and being sucked in by the cooling fan. This results in reduction of power required by the cooling fan to suck in and draw the substantial amount of atmospheric air. In an embodiment, the advantage which the honeycomb structured plate provides is that it enables an even and straight direction of air entering in the system, such that the distortion of air occurring while entering the air cooling inlet is eliminated. The first set of plate reduces the resistance for the air entering in the system, thus resulting in reduction of the power required by the cooling fan to suck in required air and increasing the fan efficiency. In furtherance to it, the embodiment improves the air flow rate and resulting in the improvement of the engine temperature as well.
[00024] In an embodiment, the air cooling inlet is provided with a second set of plate disposed after the first set of plate. The plate is hollow structured, wherein the hollow portion is in line with the opening of the air cooling inlet such that none of the atmospheric air entering is disturbed. However, the second set of plate covers the depressions at the corners of the air cooling inlet present below the honeycomb structure plate. The second set of plate covers those depressions at the corners to make it an even and plain surface, such that none of the atmospheric air is blocked or collides at the depressions in the corners. Thus, the excess amount of power required by the cooling fan to circulate the atmospheric air stuck at those corners is reduced.
[00025] With the above proposed invention, the following advantages can be obtained such as improved cooling fan efficiency, improved air flow rate and reduced engine temperatures. In furtherance to it the embodiment reduces the resistance for the air entering in the system.
[00026] The present invention along with all the accompanying embodiments and their other advantages would be described in greater detail in conjunction with the figures in the following paragraphs.
[00027] In relation to the following description of embodiment(s), arrows as and where provided in the top right corner of each figure depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Up denotes upward direction, an arrow Dw denotes downward direction. Also, an arrow with LH denotes a left side, and an arrow with RH denotes a right side. All aforementioned directions are with respect to the vehicle.
[0001] Fig. 1 illustrates a right side view and right side view of the scooter type vehicle in accordance with an embodiment of the present subject matter. The vehicle comprises of a frame assembly (105) which is conventionally an underbone chassis frame which provides a generally open central area to permit “step-through” mounting by a rider. Typically, the frame assembly (105) comprises of a head tube (102), a main tube (107), and a pair of side tubes (109) (only one shown). The head tube (102) is disposed towards the front portion, wherein the main tube (107) extends downwardly and rearwardly from the head tube (102) forming a flat horizontal step-through portion (117). The other end of the main tube (107) is connected with the pair of side-tubes (109) through a bracket (not shown).
[0002] The head tube (102) is configured to rotatably support a steering tube (104) and further connected to the front suspension system (not shown) at the lower end. A handlebar support member (not shown) is connected to an upper end of the steering tube (102) and supports a handlebar assembly (106). The upper portion of the front wheel (119) is covered by a front fender (103) mounted to the lower portion of the steering shaft (104). The pair of side-tubes (109) extends from the other end of the main tube (107) and are disposed parallel on either side of the vehicle width direction. Each of the said side tube (109) includes a down frame section (109a) inclined and extending from the main tube (107) and gradually after a certain length extending rearward in a substantially horizontal direction to the rear of the vehicle. A plurality of cross pipes (not shown) is secured in between the pair of side-tubes (109) at selected intervals to support vehicular attachments including a utility box (not shown), a seat assembly (108) and a fuel tank assembly (not shown).
[00028] A seat (108) is supported on the pair of side-tubes (109) on which a rider may sit. Generally, the utility box (not shown) is supported between the front portions of the left and right end of the pair of side-tubes (109) so as to be disposed below the seat (108). A fuel tank assembly (not shown) is disposed on between the rear portions of the pair of the side-tubes (109). The exhaust emission system (116) can be seen disposed at the side extending rearward coupled to the frame assembly. There is front brake (not shown) and rear brake (114) arranged on the front wheel (119) and a rear wheel (113) respectively. The rear wheel (113) is covered by a rear fender (111) with a tail light (112) disposed above it and a support bar (118) place above it at the end of the seat assembly (108). The rear wheel (113) is supported towards the rear side of the frame by the internal combustion (IC) engine (101) which is horizontally coupled swingably to the rear of the frame assembly of the two-wheeled vehicle through a rear suspension system (not shown). An air cooling system (110) is provided for the IC engine (101) which helps in cooling the assembly because of the excess heat generated within it. The IC engine (101) transfers the drive directly to the rear wheel (113) as it is coupled directly to it through a continuously variable transmission (CVT) system.
[00029] Fig. 2 illustrates a right side view of the frame assembly (105) of the exemplary two-wheeled vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the frame structure (105) functions as a skeleton and backbone of the vehicle, holding the whole vehicle (50) together with all the parts assembled over it. The internal combustion engine (101) which powers the vehicle (50) is swingably mounted on the frame assembly (105). In an embodiment, the air cooling system (110) comprises of a cooling fan (not shown), a shroud assembly (120), and an air cooling inlet (115) formed on the shroud assembly (120). The shroud assembly covers the entire internal combustion engine (101). In an embodiment, the air being sucked in by the cooling fan is re-circulated in the space provided between the shroud assembly (120) and the internal combustion engine (101) to keep the temperature of the internal combustion engine (101) under check. The exhaust emission system (116) is connected to the internal combustion engine (101) to oxidize and discharge the exhaust generated by it. In an embodiment, an air cooling inlet (115) is formed on the shroud assembly (120), located just above the cooling fan. The air cooling inlet (115) formed works as an entrance of air in the air cooling system (110). The cooling fan sucks in the air present around the vehicle (50) in that region of air cooling inlet (115) or the air passing through its side in the running condition of the vehicle (50), and later re-circulates it around the internal combustion engine (101) for its efficient cooling.
[00030] Fig. 3 illustrates a side view of the internal combustion engine (101) of the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the air cooling inlet (115) is disposed on the shroud assembly (120), wherein the air cooling inlet (115) provides a space and opening (115O) for the atmospheric air to enter. The air cooling inlet (115) comprises of an opening (115O) through which the atmospheric air enters the air cooling system (110). In an embodiment, a first set of plate (121) is formed in the opening (115O) of the air cooling inlet (115) just above the cooling fan to help in channelizing the direction of the air entering. In an embodiment, the first set of plate (121) comprises of a honeycomb structured grill formed in it. The first set of plate (121) provides a straight and even direction to the air entering such that resistance for the air to enter is reduced. The first set of plate (121) comprises of small evenly placed openings which provide an even direction to the atmospheric air entering the air cooling system (110). In an embodiment, the honeycomb structured plate (121) provides an even direction to the atmospheric air entering which on previous occasions in known art used to get distorted due to the pressure difference. A high amount of resistance is provided by the atmospheric air when it gets distorted while being drawn in by the air cooling fan. However, the first set of plate (121) reduces the resistance for the air entering in the air cooling unit (110) by channelizing it. This in turn reduces the power consumption by the cooling fan to suck in the air and re-circulate it in the internal combustion engine (101).
[00031] Fig. 4 illustrates a front view of the air cooling inlet (115) of the of the air cooling system (110) for the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the opening (115O) provided in the air cooling inlet (115) provides an entrance for the atmospheric air into the air cooling system (110). In an embodiment, the first set of plate (121) is formed in the opening (115O) of the air cooling inlet (115) just above the cooling fan to help in channelizing the direction of the air entering. As described above, the first set of plate (121) comprises of small even placed and sized openings which give an impression of a honeycomb structured grill. It provides a straight and even direction to the air entering. Hence, through the present structure resistance for the air to enter is reduced. In known art, a high amount of resistance is provided by the atmospheric air when it is distorted while being drawn in by the air cooling fan. However, the first set of plate (121) reduces the resistance for the air entering in the air cooling unit (110) by channelizing it. This in turn reduces the power consumption by the cooling fan to suck in the air and re-circulate it in the internal combustion. The first set of plate (121) with its evenly shaped openings help in channelising the direction of the air entering such that the resistance faced by it previously is reduced. Since, the direction of air entering is channelized and the resistance is less it becomes easier for the cooling fan to suck it and recirculate it, Thus, the power consumed by the cooling fan is also reduced.
[00032] Fig. 5 (a) illustrates a top view of a conventional known air cooling inlet (115P) used in prior arts for a scooter type vehicle (50) as shown in Fig. 1. The previous known air cooling inlets (115P) did not comprise of a plate with a honeycomb structured grilled formed in it due to which the direction of the air entering did not follow an even pattern. The atmospheric air entering through the air cooling inlet followed a zigzag and uneven pattern (55) due to the pressure difference in the region. Thus, the direction of the air entering (55) within the air cooling system followed the direction of pressure difference. The resistance of the atmospheric air entering the air cooling system is also high because of the uneven and zigzag pattern of flow (55). Thus, the power required by cooling fan to draw in and circulate the atmospheric air in such a case is high. It also affects the efficiency of the cooling fan and the air cooling system. Thus, there is a need to streamline the flow of air to achieve a smooth and uniform flow of air, which is addressed by the present invention.
[00033] Fig. 5 (b) illustrates a top view of the air cooling inlet (115) of the air cooling system (110) of the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the first set of plate (121) is formed in the opening (115O) of the air cooling inlet (115). The first set of plate (121) comprises of evenly shaped openings disposed at even distances to channelize the atmospheric air entering into the air cooling unit (110). In an embodiment, the first set of plate (121) helps in channelizing the direction of the atmospheric air entering (60) such that it does not follow an uneven direction in line with the pressure difference. The even direction of the atmospheric air entering (60) reduces the overall resistance of the air while entering. Thus, it helps in reduction of the power required by the cooling fan to draw in and circulate the atmospheric air.
[00034] Fig. 6 illustrates a rear view of the air cooling inlet (115) of the air cooling system (110) of the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the air cooling inlet (115) has depressions (115D) formed at its rear, around the corners in an area after the first set of plate (121). Once the atmospheric air enters air cooling system (110) through the air cooling inlet (115) it collides around the depressions (115D) and gets stuck in there. The atmospheric air entering (65) and getting stuck and stagnated around the depressions (115D) is also illustrated in the present figure. Thus, the cooling fan requires extra power to draw the atmospheric air out from those depressions (115D) to circulate it around the internal combustion engine (101). Due to the above explained problem the power requirement of the cooling fan tends to be high even after proper channelizing & normalizing of the atmospheric air which is entering through the baffle plate. This in turn also affects the efficiency of the air cooling system (110) and the cooling fan.
[00035] Fig. 7 illustrates an exploded view of the air cooling inlet (115) and a second set of plate (122) of the air cooling system (110) of the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, a second set of plate (122) is disposed on a rear portion of the air cooling inlet (115), placed after the first set of plate (121). The second set of plate (122) is structured to cover the depressions (115D) formed at a rear portion around the corners of the air cooling inlet (115). The second set of plate (122) perfectly covers the above described depressions (115D), such that none of the atmospheric air entered into the air cooling inlet (110) is blocked in that region. In an embodiment, the second set of plate (122) is hollow structured, wherein the hollow portion (122O) is in line with the opening (115O) of the air cooling inlet (115) and matched its profile such that there is no obstruction for the travelling of atmospheric air. Thus, the second set of plate (122) perfectly covers the depressions (115D) of the air cooling inlet (115) formed around its corners at its rear portion to eliminate any blocking or obstruction of atmospheric air in that region. Hence, such a structure of the second set of plate (122) covers the depression (115D) and does not allows the atmospheric air to get stuck in there and reduces the extra power requirement of the cooling fan used earlier to circulate the atmospheric air stuck around the depressions (115D).
[00036] Fig. 8 illustrates a rear view of the air cooling inlet (115) and combined with the second set of plate (122) of the air cooling system (110) of the scooter type vehicle (50) as shown in Fig. 1, in accordance with an embodiment of the present subject matter. In an embodiment, the second set of plate (122) is disposed on a rear portion of the air cooling inlet (115), placed after the first set of plate (121). The second set of plate (122) is structured such that it covers the depressions (115D) and does not disturbs the air entering through opening (115O) as well. However, the second set of plate (122) is formed in way to block the depressions (115D) formed in the rear portion of the air cooling inlet (115). The second set of plate (122) perfectly covers the above described depressions (115D), such that none of the atmospheric air entered into the air cooling inlet (110) is blocked in that region. In an embodiment, the second set of plate (122) comprises of a profiled cut out portion (122O) which matches with opening (115O) of the air cooling inlet (115) such that there is no obstruction for the travelling of atmospheric air. However, the sides of the second set of plate (122) perfectly cover the depressions (115D) of the air cooling inlet to eliminate any blocking or obstruction of atmospheric air in that region. This reduces the extra power requirement of the cooling fan to circulate the atmospheric air stuck in that region. Thus, the present subject matter provides a first set of plate (121) formed in the opening (115O) of the air cooling inlet (115) which channelizes the atmospheric air entering into the air cooling system (110), As per another embodiment of the present invention, a second set of plate (122) disposed after the first set of plate (121) in the rear portion of the air cooling inlet (115) which covers the depressions (115D) formed therein. The second set of plate (122) is disposed behind the opening (115O) after the first set of plate (121). The second set of plate (122) is detachably attached to the air cooling inlet (115) at its rear portion such that it covers the depressions formed around the corners therein. Prior to this, atmospheric air entering used to get stuck around such depressions (115D), but since now the depressions are (115D) covered there is more stagnation of air around it. Hence, such an assembly also helps in further reduction of power consumption of air cooling fan which was previously spent on circulating air stuck in the depressions (115D). The present subject matter, with the combination of both the plates enables an efficient air cooling system (110) in which the power requirement of the cooling fan is very less and is efficient as well. The present subject matter provides an efficient suction and recirculation of the atmospheric air through the air cooling system (110) for which the power requirement is less, and being enabled through one or more set of normalizing baffle plates (121,122).
[00037] Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described.
,CLAIMS:We Claim:
1. A saddle type vehicle (50) comprising:
a frame assembly (105) comprising a head tube (102) formed at a front portion of said vehicle (50) and a main tube (107) extending in a downward and rearwardly direction from said head tube (102) to form a step through structure (117);
an internal combustion engine (101) swingably attached to rearmost portion of said step through structure (117) of said main tube (107);
a shroud assembly (120) covering entire said internal combustion engine (101);
an air cooling system (110) comprising an air cooling inlet (115) disposed on a side of said shroud assembly (120), enabled to allow an entry for atmospheric air into said air cooling system (110), wherein said air cooling inlet (115) comprises one or more sets of normalizing baffle plates (121, 122) to provide a uniform direction to atmospheric air entering through said air cooling inlet (115).
2. The saddle type vehicle (50) as claimed in claim 1, wherein said air cooling inlet (115) comprises an opening (115O) with at least a first set of plate (121) of said one or more sets of normalizing plates (121, 122) formed therein.
3. The saddle type vehicle (50) as claimed in claim 2, wherein said first set of plate (121) comprises of a substantially honeycomb structured grill formed therein to allow a uniform flow of atmospheric air in said air cooling system (110).
4. The saddle type vehicle (50) as claimed in claim 3, wherein said substantially honeycomb structured grill of said first set of plate (121) comprises evenly spaced openings to provide a straight and uniform direction to the air which is entering in.
5. The saddle type vehicle (50) as claimed in claim 1 , wherein said one or more sets of normalizing plates (121, 122) of said air cooling inlet (115) comprises a second set of plate (122) disposed behind said opening (115O) to substantially cover gaps and corners around said air cooling inlet (115) enabling in prevention of blocking and stagnating of atmospheric air.
6. The saddle type vehicle (50) as claimed in claim 1, wherein said one or more sets of normalizing plates (121, 122) comprises a second set of plate (122) disposed rearwardly of a first set of plate (121).
7. The saddle type vehicle (50) as claimed in claim 5, wherein said second set of plate (122) is a hollow structured plate.
8. The saddle type vehicle (50) as claimed in claim 5, wherein said second set of plate (122) of said air cooling inlet (115) comprises of a hollow portion (122O) formed at center and a solid structure formed around said hollow portion (122O).
9. The saddle type vehicle (50) as claimed in claim 8, wherein said hollow portion (122O) is disposed in line with an opening (115O) to maintain flow of atmospheric air.
10. The saddle type vehicle (50) as claimed in claim 5 or 8, wherein said air cooling inlet (115) comprises depressions (115D) around corners, and wherein said solid structure is formed around said hollow portion (122O) disposed around corners of said air cooling inlet (115) to cover said depressions (115D) preventing blocking and stagnating of atmospheric air therein.