TECHNICAL FIELD

[0001] The present subject matter relates generally to a step through type motorcycle. More particularly, but not exclusively, the present subject matter relates to the cooling vent assembly for the step-through type motorcycle.

BACKGROUND

[0002] Generally, in a scooter type vehicle, an engine assembly is situated under-seat horizontally, having cylinder head of the engine facing towards a floorboard of the scooter type vehicle. The front portion of the vehicle having the engine under the seat is protected by an under-seat cover to prevent dust and other particles from entering into the engine area during motion of the vehicle. Engine cooling is facilitated by providing an opening covered by a mesh on the under-seat cover. The cool air from the atmosphere flows into the engine area through the opening provided.

[0003] Generally, in the vehicle, various noises are generated, which include induction noise, exhaust noise, noise from accessories, and noise radiation from engine sources. Induction noise is due to opening and closing of valves. In cylinder on opening the valve, the inlet air column is set into oscillation due to intense pressure thump. Closing of the inlet valve produces forced undamped vibrations. Exhaust noise exists when exhaust valve opens and releases gases into exhaust system. Various accessories used generate unwanted sound. In this category engine fan is the main source of noise. It is used in addition to radiator

for cooling, and operated by air during ride. Pressure fluctuations results in generation of noise.
[0004] Hence, in the vehicle, during the engine operation heat dissipation and noise generation occurs through the opening provided on the under-seat cover. The heat and the noise coming out of the opening may cause discomfort to the rider. Further, the heat dissipated may impact the functioning of any electrical components disposed in the area above the floor board of the scooter type vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Fig. 1 shows a side viewof-a'scooter type-vehicle having a cooling vent . assembly according to the present invention.

[0006] Fig. 2(a) shows a sectional view of an engine assembly along with the cooling vent assembly.

[0007] Fig. 2(b) shows an enlarged view of the cooling vent assembly.

. [0008] Fig. 3(a) shows a front view of an under-seat cover accommodating a cooling vent assembly.

. [0009] Fig. 3(b) shows an exploded view of an under-seat cover and a detachable enclosure mounted onto the rear side of the mesh.

[00010] Fig. 4 shows a perspective side view of a detachable enclosure mounted onto the rear side of the mesh.

DETAILED DESCRIPTION

[00011] The present subject matter discloses a cooling vent assembly disposed on the under-seat cover, near the floor board, situated in a front portion of a scooter type vehicle. The cooling vent assembly according to the present subject matter comprises of the under-seat cover, a mesh, a detachable enclosure mounted to the rear side of the mesh. The problem of heat dissipated and noise generated during the engine operation reaching the rider can be reduced by employing the present . subject matter. From the figures and their description, objectives of the present subject matter can be understood in detail as follows.

[00012] Fig. 1 shows a side view of the scooter type vehicle. The vehicle has a body frame assembly made up of several tubes welded together which usually supports the body of the said vehicle. The vehicle has a steerable front wheel 101 and a driven rear wheel 102. The body frame assembly of the vehicle is an elongated structure, which typically extends from a forward end to a rearward end of the vehicle. It is generally convex in shape, as viewed from a side elevation view. The said frame assembly includes a head tube (not shown), a main frame and also may have a sub-frame. The sub-frame is attached to the main frame using appropriate "joining mechanism. The frame assembly is covered by a plurality of vehicle body covers including a front panel 104, an under-seat cover 105, a cooling vent assembly 106, a rear cover 113, a front panelbottom 107, and a side panel 109.

[00013] A handlebar assembly 110 and a seat assembly 103 are supported at opposing ends of the frame assembly and a generally open area is defined there

between known as floorboard 108 which functions as a step through space. The seat for a driver and a pillion is placed forward to a fuel tank and rear side of floorboard 108. A front fender 111 is provided above the front wheel 101 to avoid the said vehicle and its occupants from being splashed with mud. Likewise a rear fender (not shown) is placed between fuel tank and rear wheel 102, and to the outer side in the radial direction of rear wheel 102. Rear fender inhibits rain water or the like from being thrown up by rear wheel 102.

[00014] Suspensions are provided for comfortable steering of the vehicle on the road. A front suspension assembly (not shown) is connected to a front fork 112. The rear suspension assembly comprises of at least one rear suspension preferably on the left side of the vehicle. However, a vehicle with two rear suspensions, namely on the left side and the right side is also possible. For the safety of the user and in conformance with the traffic rules, a headlight 114 in the front portion of the vehicle and a taillight 115 in the rear portion of the vehicle is also provided.

[00015] The cooling vent assembly 106 is provided on the under-seat cover 105 to facilitate engine cooling. Fresh air from the atmosphere enters into the cooling vents and flows towards the engine helping in engine cooling. The working of cooling vent assembly is as follows.

[00016] Fig. 2(a) shows a sectional view of the engine assembly along with cooling vent assembly. The figure depicts positioning of the cooling vent assembly 106 with respect to the cylinder head 201 and the floorboard 108. From the figure, it can be observed that the cylinder head 201 of the engine is inclined forwardly in the longitudinal direction of the vehicle, which is close to the cooling

vent assembly 106. The cooling vent assembly 106 includes an opening on the under-seat cover to facilitate the engine cooling. The opening is covered by a mesh 203. The heat dissipated and noise generated due to engine operation is let out through the opening. The heated air and noise coming out through the opening may cause discomfort to the rider. The said problems are overcome in the present invention and can be understood in detail from the following discussion.

[00017] Fig. 2(b) shows an enlarged view of the cooling vent assembly 106. Various parts of the cooling vent assembly 106 are the under-seat cover 105, a mesh 203, the opening on the under-seat cover covered by the mesh 203 and detachable enclosure 202 mounted on a rear-side of the mesh 203. The cooling vent assembly 106 is configured such that a predetermined gap 204 is maintained •between the rear side of the mesh 203 and the detachable enclosure 202. The primary purpose of the predetermined gap 204 maintained is to guide natural atmospheric air coming into the engine area for engine cooling. The cool air passing through the predetermined gap 204 also helps in cooling down the hot air coming out of the cylinder head 201 of the engine. The noise generated due to engine operation passes through the detachable enclosure 202 mounted on the rear side of the mesh 203. Hence, the detachable enclosure 202 acts as an additional layer trying to absorb most of the noise coming out of the engine area. Therefore, through the present embodiment, the hot air, and noise reaching the rider is reduced. The cooling vent assembly 106 is configured and mounted on to the under-seat cover 105 such that the heat dissipated and noise generated is reduced

and then let out of the opening covered by the mesh 203. The rider only experiences reduced heat and noise, thereby reducing rider's discomfort.

[00018] Fig. 3(a) shows the front view of the under-seat cover 105 accommodating the cooling vent assembly 106. Referring to Fig. 3(a), it can be observed that the under-seat cover 105 is configured to have provisions 301 and 302 for fastening the under-seat cover 105 onto the side panels 109 and the floorboard 108 of the scooter type vehicle. Three provisions are provided on the under-seat cover 105, out of which, two provisions 301 are provided at the top for fastening onto the side panels and one provision 302 at the bottom for fastening onto the floor board.. Further, of the under-seat cover is configured to have pips 303.at the bottom.to provide mounting onto the floorboard 108.

[00019] Fig. 3(b) shows an exploded view of the under-seat cover 105 along with the cooling vent assembly'106 is also shown in the figure. The cooling vent assembly comprises of the opening covered by the mesh 203. The detachable enclosure 202 is mounted on the rear side 203a of the mesh 203. The detachable enclosure 202 is configured to maintain a predetermined gap 204 when mounted on the rear side 203a of the mesh 203. The predetermined gap 204 acts as a cool "air passage. The cool air passes from the atmosphere through the predetermined gap 204 and enters into the engine area. Thereby, facilitating engine cooling. Due to the cool air present in'the predetermined gap 204, the hot air dissipated during the engine operation coming from the cylinder head 201 is cooled before reaching the rider. In addition, the detachable enclosure absorbs the noise partially that is generated during the engine operation and reduced noise is let out of the vehicle

through the mesh 203, resulting in reduced customer discomfort. The detailing included in the configuration of the detachable enclosure is as discussed with respect to Fig. 4.

[00020] Fig. 4 shows the detachable enclosure 202 and various parts included. The configuration is as follows. The detachable enclosure 202 consists of two sets of protrusions on a front side 202a. The diameter of first set of protrusions 401 is larger than the second set of protrusions 402. The first set of protrusions 401 is used to obtain locking of the detachable enclosure 202 with the mesh 203. The mesh 203 is configured to have provisions to accommodate the first set of ■protrusions 401. The second set of protrusions 402 do not provide locking but have contact point with the rear side 203a of the mesh 203. The second sets of protrusions 402 are configured to achieve a clearance between the detachable enclosure 202 and the rear side 203a of the mesh 203. A predetermined gap 204 in the range of 2-5mm is maintained therefore.

[00021] Although the subject matter has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. It is to be understood that the appended claims are not necessarily limited to the features described herein. Rather, the features are disclosed as embodiments of the step through motorcycle.

I/We claim:

1. A step through motorcycle (1) comprising:
a handlebar assembly (110) disposed at a front end portion of the step through type motorcycle (1); a seat assembly (103) disposed rearwardly to said handlebar assembly (110) with a.well-defined gap therebetween; a floorboard (108) disposed in the well-defined gap at a substantially lower portion of the step through type - -motorcycle (1);

an under-seat cover (105) disposed below said seat assembly (103), and rearwardly to said floorboard (108), wherein,

said, under-seat cover (105) comprises a cooling vent assembly (106) including a mesh (203) disposed on a front surface (105a) of said under-seat cover (105) and a detachable enclosure (202) disposed on the rear side (203a) of said mesh (203) with a predetermined gap (204) therebetween. ■ 2. The'step through motorcycle (1) as claimed in claim 1, wherein ' said detachable enclosure (202) comprises of a plurality of protrusions (401,402) disposed on a front side (202a) of the detachable enclosure (202).

3. The step through motorcycle (1) as claimed in claim 1, wherein said plurality of protrusions (401,402) comprises of a first set of protrusions (401) having diameter larger than the" second set of protrusions (402).

4. The step through motorcycle (1) as claimed in claim 1, wherein said detachable enclosure (202) is detachably attached to said rear side (203a) of the mesh (203).

5. The step through motorcycle (1) as claimed in claim 1, wherein said rear side (203a) of the mesh (203) is capable of receiving said firstsetof protrusions (401).

6. The step through motorcycle (1) as claimed in claim 1 or 3, wherein said second set of protrusions (402) allow formation of said predetermined gap (204) between said rear side (203a) of said mesh (203) and said detachable enclosure (202).

7. The step through motorcycle (1) as claimed in claim 1, wherein said predetermined gap (204) is an air gap.

8. The step through motorcycle (1) as claimed in claim 1, wherein said mesh (203) includes a honeycomb like structure.

9. The step through motorcycle (1) as claimed in claim 1, wherein
' said predetermined gap (204) is in the range of 2-5mm.