Cooling system for an engine

Field of the invention

The present invention relates to "Cooling system for an engine", and more particularly to cooling system for air-cooled engine used on two or three wheeled vehicles.

Description of the prior art

Mostly three wheeler and two-wheeler engines use a cowling assembly that direct the air from a centrifugal fan on the crankshaft. The cowling assembly comprises of a cowling unit & a deflector. The air follows an involute path inside the cowling unit and then is channelled by an air-guiding channel to cool various external portions of the engine such as the cylinder head or the exhaust port area. A deflector portion that encompasses the portion from the cylinder head to a portion of the exhaust pipe forms the second part of the cowling assembly. However, in this design, there is always a possibility of uneven cooling of the engine due to singular attention of the air-guiding channel to a localised portion of the engine exterior. Due to this over uneven cooling, overheating of the internal parts may occur which results in more oil consumption, seizure of internal parts of the engine, etc. which seriously affects the engine. Moreover, with this design, a portion of the guided air is always leaked due to openings in the cowling unit such as relief provided for exhaust pipe, etc.

Hence a need arises for providing an effective means of channelling the drawn air to engine, which cools the engine exterior in an effective manner.

Therefore, the main objective of the present invention is to provide a cooling means that distributes the drawn air effectively over the engine and thus increases the cooling efficiency of the engine.

Brief description of the invention

A cooling system for an automobile comprising an engine consisting of a cylinder body and a cylinder head having an exhaust port formed on the said cylinder head a centrifugal fan mounted on the crankshaft of the said engine sucking air from the atmosphere for cooling the engine a cowling unit comprising of an air inlet path, an air exit path flanked by guide walls, and an air deflector surrounding the said engine having an air-guiding channel is introduced on the said air exit path on the said cowling unit that guides the air flow from the said air exit path to the said exhaust port of the said engine. Moreover, an air-guiding channel is also introduced on the said air deflector portion that guides the air from the said air exit path to the said exhaust port of the said engine.

Brief description of the drawings

Figure 1 illustrates a three-wheeler showing the rear view of the cooling unit

Figure 2 illustrates air-guiding channels on cowling unit

Figure 3 illustrates air-guiding channels on deflector unit

Detailed description of the invention

Any known three-wheeler can be divided into three major portions, the front portion, the middle portion and the rear/tail portion. The front portion comprises of the steering 101, front wheel 102 with necessary brakes, front suspension and fender (not shown in the figure), wind shield 105, wiping system, dash board 106 with control switches, head lamp and side indicator. The middle portion comprises of the driver seat 107, footrest for the driver 108, hand start link rod 109, and partition wall 110. The rear/tail portion comprises of engine assembly 111, petrol tank, rear wheel 112 with suspension, cabin assembly, passenger seat (not shown in the figure), rear combination lamp assembly 114 (LH & RH) and silencer assembly 115. One embodiment of the present invention provides a cooling system for an engine comprising an engine which consists of a cylinder body and a cylinder head having an exhaust port formed on the said cylinder head a centrifugal fan mounted on the crankshaft of the said engine sucking air from the atmosphere for cooling the engine; a cowling unit 201 comprising of an air inlet path 202, an air exit path 203 flanked by guide walls 204, and an air deflector 205 surrounding the said engine wherein an air-guiding channel 206 is introduced on the said air exit path 203 on the said cowling 201 unit that guides the air flow from the said air exit path 203 to the said exhaust port of the said engine. Moreover an air-guiding channel 206 is introduced on the said air deflector portion 205 that guides the air from the said air exit path 203 to the said exhaust port of the said engine. The maximum depth and width of said air-guiding channel 206 is that of the said air exit path 203. The cooling system as mentioned above wherein the said air-guiding channel 206 formed on the said exit path 203 and the said air-guiding channel 206 formed on the said deflector portion 205 of the said cowling unit 201 can work independently of each other.

Following table could be considered which gives quantitative values of the cooling efficiency comparing the present invention to the prior art.

Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. As such, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained therein.

Claims:

We claim

1. A cooling system for an automobile comprising

a. an engine consisting of a cylinder body and a cylinder head having an exhaust port formed on the said cylinder head

b. a centrifugal fan mounted on the crankshaft of the said engine sucking air from the atmosphere for cooling the engine

c. a cowling unit comprising of an air inlet path, an air exit path flanked by guide walls, and an air deflector surrounding the said engine
wherein an air-guiding channel is introduced on the said air exit path on the said cowling unit that guides the air flow from the said air exit path to the said exhaust port of the said engine,

wherein an air-guiding channel is introduced on the said air deflector portion that guides the air from the said air exit path to the said exhaust port of the said engine.

2. The cooling system as claimed in claim 1, wherein the maximum depth of said air-guiding channel is that of the said air exit path.

3. The cooling system as claimed in claim 1, wherein the maximum width of said air-guiding channel is that of the said air exit path.

4. The cooling system as claimed in claim 1, wherein the said air-guiding channel formed on the said exit path and the said air-guiding channel formed on the said deflector portion of the said cowling unit can work independently of each other.

5. The cooling system as claimed in claim 1, wherein the said air guiding channels formed on both the said air exit path and said deflector portion introduce the guided air on the cylinder head cover of the said engine.

6. The cooling system as claimed in claim 1, wherein the said air-guiding channel introduced on the deflector portion extends either on the total deflector portion or a part thereof.

7. The cooling system herein substantially described and illustrated with reference to the accompanying drawings.