WO2023187800A1

WO2023187800A1 - Vapor trap assembly for fuel tank and two-wheeled vehicle thereof

Info

Publication number: WO2023187800A1
Application number: PCT/IN2022/051126
Authority: WO
Inventors: Raja Dhilip KUMAR; Boobalan Mani
Original assignee: Tvs Motor Company Limited
Priority date: 2022-03-28
Filing date: 2022-12-26
Publication date: 2023-10-05

Abstract

Present invention provides a vapor trap assembly (100) for a fuel tank (202) of a vehicle. The assembly (100) comprises a vapor tapping enclosure (102) disposed within the fuel tank (202) and positioned proximal to a filler neck (204) of the fuel tank (202). The vapor tapping enclosure (102) is defined with openings (104) for receiving vaporized fuel from fuel tank (202). A vapor discharge tube (106) has first end (106a) coupled to vapor tapping enclosure (102) and second end (106b) coupled to canister (206), wherein the vapor discharge tube (106) is adapted to route vaporized fuel received by vapor tapping enclosure (102) into canister (206) for adsorbing vaporized fuel. The assembly (100) minimizes contact with inner wall surfaces of vapor tapping enclosure (102). Thus, reducing condensation of vaporized fuel within vapor tapping enclosure (102) and consequently preventing entry of liquid fuel into canister (206).

Description

TITLE OF INVENTION

Vapor Trap Assembly for Fuel Tank and Two-Wheeled Vehicle Thereof

FIELD OF THE INVENTION

[001] Present invention relates to an evaporative emission control assembly for a vehicle. More particularly, relates to a vapor trap assembly for a fuel tank of the vehicle.

BACKGROUND OF THE INVENTION [002] In recent past, to accommodate stringent emission regulations imposed by regulatory authorities, vehicle manufacturers are in constant pursuit of developing devices that can reduce vehicle emissions and conform to the emission regulations. One such device is a vapor trap assembly, that traps into fuel vapors generated inside a fuel tank. The trapped fuel vapors are directed to a carbon canister through a vapor discharge tube for adsorption, thereby preventing escape of the fuel vapors into ambient air. However, in the conventional vapor trap assembly, when a vehicle rolls beyond a predetermined angle (also called as a roll over condition) or during an accident condition, fuel leakage occurs through the canister and resulting in sloshing of the fuel. Also the performance of the canister gets significantly affected due to entry of liquid fuel into the canister. [003] To overcome these problems, the vapor trap assembly is provided with a Roll Over

Valve (ROV) placed in the vapor discharge tube connecting the fuel tank and the canister. When the vehicle is in roll over condition, the ROV is operated for blocking the vapor discharge tube between the fuel tank and the canister, thereby preventing fuel leakage. However, the main disadvantage of such a vapor trap assembly is that it requires installation of the ROV as an additional component, which adds to the cost of the vehicle. For any low cost vehicle this is not a very economical option and it also necessitates extra packaging space in the fuel tank for the installation of the ROV components. This occupies the valuable space for fuel storage thereby compromising on the usable range of the vehicle. Further, abrupt acceleration or deceleration of the vehicle generates a fuel splash inside the fuel tank (due to inertia of the fuel) which may result in liquid fuel entry to a vapor discharge tube and hence to the canister, despite having a roll-over valve.

[004] To overcome the aforesaid limitations, vapor trap assemblies are provided with a plurality of polymer floats by replacing the ROV. The polymer floats work partially as the ROV, i.e. to restrict the fuel leakage when the vehicle is in roll over condition. However, this solution requires greater number of new components than the ROV, rendering the system expensive. Additionally, number of parts and time required for assembly/dismantling is also high. Moreover, such vapor trap assemblies are bulky in construction and are larger in dimensions. Due to larger dimensions, the fuel vapors that is routed inside the vapor trap assembly gets condensed upon contact with inner walls of the vapor trap assembly. Thus, the rate of condensation is high in such existing vapor trap assemblies which results in lesser amount of vapors being delivered to the canister. This affects the performance of the entire vapor trap assembly. Also, existing vapor trap assemblies have larger or bulkier construction which takes up huge space inside the fuel tank and increases the weight of the entire fuel tank. Moreover, during vehicle tilting, the vapor trap assembly due to its larger construction allows greater contact of the fuel vapors with the inner walls of the vapor trap assembly, resulting in more liquid fuel entry in to the vapor discharge tube. [005] In view of the above, there is a need for a vapor trap assembly for a vehicle, which addresses one or more limitations stated above.

SUMMARY OF THE INVENTION

[006] In one aspect, a vapor trap assembly for a fuel tank of a vehicle. The assembly comprises a vapor tapping enclosure disposed within the fuel tank and positioned proximal to a filler neck of the fuel tank. The vapor tapping enclosure is defined with one or more openings for receiving vaporized fuel from the fuel tank. A vapor discharge tube has a first end coupled to the vapor tapping enclosure and a second end coupled to a canister, wherein the vapor discharge tube is adapted to route the vaporized fuel received by the vapor tapping enclosure into the canister for adsorbing the vaporized fuel.

[007] In an embodiment, a plate member is mounted on the vapor tapping enclosure. The plate member is adapted to entrap the vaporized fuel within the vapor tapping enclosure.

[008] In an embodiment, the vapor discharge tube is routed from a top inside surface of the fuel tank for coupling with the canister.

[009] In an embodiment, the vapor tapping enclosure is defined with a cylindrical profile having a flat bottom surface. The cylindrical profile is adapted to reduce contact surface area for the vaporized fuel to reduce condensation.

[010] In an embodiment, the one or more openings are defined on the flat bottom surface of the vapor tapping enclosure. The one or more openings are aligned axially to the vapor tapping enclosure.

[011] In an embodiment, the first end of the vapor discharge tube is oriented axially to the vapor tapping enclosure during coupling. [012] In an embodiment, the vapor tapping enclosure is supported proximal to the filler neck of the fuel tank by a mounting bracket. The vapor tapping enclosure is supported such that, entry of fuel from the fuel tank into the vapor tapping enclosure through the one or more openings is prevented during a tilted condition of the vehicle.

[013] In another aspect, a two-wheeled vehicle is disclosed. The vehicle includes a frame member and a fuel tank mounted on the frame member. The vapor trap assembly for the fuel tank is also provided. The assembly comprises the vapor tapping enclosure disposed within the fuel tank and positioned proximal to the filler neck of the fuel tank. The vapor tapping enclosure is defined with the one or more openings for receiving vaporized fuel from the fuel tank. The vapor discharge tube has the first end coupled to the vapor tapping enclosure and the second end coupled to the canister, wherein the vapor discharge tube is adapted to route the vaporized fuel received by the vapor tapping enclosure into the canister for adsorbing the vaporized fuel.

[014] In an embodiment, the fuel tank is a metallic fuel tank.

BRIEF DESCRIPTION OF THE DRAWINGS

[015] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.

Figure 1 is a schematic view of a two-wheeled vehicle, in accordance with an embodiment of the present invention. Figure 2 is a schematic view of a fuel tank of the vehicle including a vapor trap assembly, in accordance with an embodiment of the present invention.

Figure 3 is a schematic view of the fuel tank including the vapor trap assembly, in accordance with an embodiment of the present invention.

Figure 4 is a perspective view of the vapor trap assembly, in accordance with an embodiment of the present invention.

Figure 5 is a sectional view of the vapor trap assembly, in accordance with an embodiment of the present invention.

Figure 6 is a schematic view of the fuel tank in a tilted condition, in accordance with an embodiment of the present invention.

Figure 7 is an enlarged view of portion B in Figure 6, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[016] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder.

[017] Figure 1 illustrates a schematic view of a two-wheeled vehicle 200, in accordance with an embodiment of the present invention. As an example, the two-wheeled vehicle 200 is a motorcycle. The vehicle 200 comprises an internal combustion engine 210 that is adapted to generate motive force required for movement of the vehicle 200. In an embodiment, the internal combustion engine 210 is a single-cylinder engine. The vehicle 200 comprises a front wheel 212, a rear wheel 214, a frame assembly (not shown), a seat 216, and a fuel tank 202. The frame member includes a head pipe 210a, a main tube (not shown), a down tube (not shown), and a seat rail (not shown). The head pipe supports a steering shaft (not shown) and a telescopic suspension unit 220 attached to the steering shaft through a lower bracket (not shown). The telescopic suspension unit 220 supports the front wheel 212.

[018] Further, the upper portion of the front wheel 212 is covered by a front fender 218 mounted to the lower portion of the telescopic suspension unit 220 at the end of the steering shaft. A handlebar 222 is fixed to upper bracket (not shown) and can rotate about the steering shaft for maneuvering the vehicle 200. A headlight 224, a visor guard 226 and an instrument cluster (not shown) are arranged on an upper portion of the head pipe. The frame member comprises the down tube that may be positioned in front of the engine 210 and extends slantingly downward from head pipe. The main tube of the frame member is located above the engine 210 and extends rearward from head pipe.

[019] The fuel tank 202 is mounted on the main tube. Seat rails are joined to main tube and extend rearward to support the seat 216. A rear swing arm 232 is connected to the frame member to swing vertically, and the rear wheel 214 is connected to rear end of the rear swing arm 232. Generally, the rear swing arm 232 is supported by a rear suspension 234 on either side of the vehicle 200. A taillight unit 236 is disposed at the end of the vehicle 200 and at the rear of the seat 216. A grab rail 228 is also provided to the seat rails. The rear wheel 214 is arranged below the seat 216 rotates by the motive force of the engine 210 transmitted through a chain drive (not shown).

[020] Further, a rear fender 230 is disposed above the rear wheel 214. An exhaust pipe (not shown) of the vehicle 200 extends vertically downward from the engine 210 and then extends below the engine 210, longitudinally along length of the vehicle 200 before terminating in a muffler (not shown). The muffler is typically disposed adjoining the rear wheel 214. [021] Referring to Figure 2 in conjunction with Figure 1 , the fuel tank 202 is depicted. As shown, the fuel tank 202 is mounted on the main tube of the frame member. The fuel tank

202 includes a top inside surface 202a adapted to engage with the main tube and a top outer surface 202b mounted over the top inside surface 202a so as to form a container for storing fuel required for operation of the internal combustion engine 210. In the present embodiment, the surfaces 202a, 202b conform to a U-shaped profile, to form U-shaped fuel tank 202. Alternatively, the shape, configuration and dimensions of the surfaces 202a, 202b can be considered as per design feasibility and requirement of the fuel tank 202. Also, the surfaces 202a, 202b can be made of a metallic material, a non-metallic material or a composite material, as per design feasibility and requirement.

[022] Further, the fuel tank 202 is provided with a filler neck 204. The filler neck 204 may be a cylindrical structure mounted on the top outer surface 202b and extending into the fuel tank 202. The filler neck 204 acts as an opening to the fuel tank 202, for enabling refueling. The filler neck 204 is typically mounted at a peak portion of the fuel tank 202. Proximal to the filler neck 204, a vapor trap assembly 100 for the fuel tank 202 is mounted. The description pertaining to the vapor trap assembly 100 is mentioned in detail with reference to Figures 4 and 5.

[023] Referring to Figures 4 and 5 in conjunction with Figure 2, the vapor trap assembly 100 mounted adjacently to the filler neck 204 is depicted. In the present embodiment, the assembly 100 is mounted adjacently behind the filler neck 204 about the front-rear direction of the vehicle 200. The assembly 100 is adapted to trap vaporized fuel generated within the fuel tank 202, thereby preventing discharging of the vaporized fuel to the ambient air from the fuel tank 202. [024] The assembly 100 comprises a vapor tapping enclosure 102 disposed within the fuel tank 202 and positioned proximal to the filler neck 204. The vapor tapping enclosure 102 traps the vaporized fuel received from the fuel tank 202, thereby preventing discharging of the vaporized fuel to the ambient air from the fuel tank 202. In the present embodiment, the vapor tapping enclosure 102 is mounted proximal to the filler neck 204 via a mounting bracket 110. In other words, the mounting bracket 110 supports the vapor tapping enclosure 102 adjacent to the filler neck 204. In an embodiment, one end of the mounting bracket 110 is mounted on the top inner surface 202a of the fuel tank 202, while an other end of the mounting bracket 110 is mounted on an outer surface of the vapor tapping enclosure 102.

[025] Further, the vapor tapping enclosure 102 is defined with a cylindrical profile which is oriented vertically about a front-rear direction (shown in top-left corner of Figure 1 ) of the vehicle 200. In other words, a central axis A-A’ (as shown in Figure 5) of the vapor tapping enclosure 102 is aligned vertically to front-rear direction of the vehicle 200. The cylindrical profile and its vertical orientation about the vehicle 200, reduces contact surface area for the vaporized fuel during travel from the fuel tank 202 to the vapor tapping enclosure 102. As such, the condensation of the vaporized fuel within the vapor tapping enclosure 102 is reduced. In the present embodiment, the cylindrical profile of the vapor tapping enclosure 102 is defined with a circular cross section.

[026] The vapor tapping enclosure 102 also has a flat bottom surface 102a that is oriented to face the top inner surface 202a of the fuel tank 202. Such a construction ensures that the vaporized fuel always contacts the flat bottom surface 102a of the vapor tapping enclosure 102. The flat bottom surface 102a is defined with one or more openings 104 that route vaporized fuel from the fuel tank 202 into the vapor tapping enclosure 102. The one or more openings 104 are aligned axially (or paral lelly) to the central axis A-A’ or are aligned vertically to the front-rear direction of the vehicle 200. Such an alignment of the one or more openings 104 facilitates direct entry of the vaporized fuel into the vapor tapping enclosure 102, while minimizing contact with inner wall surfaces of the vapor tapping enclosure 102. In an embodiment, the vapor tapping enclosure 102 of cylindrical profile is defined with an outer diameter of 16mm, an inner diameter of 12mm and a height of 10mm. In an embodiment, the one or more openings 104 include two openings provided symmetrically about the central axis A-A’ of the vapor tapping enclosure 102.

[027] Additionally, a plate member 108 is mounted on the vapor tapping enclosure 102, for entrapping the vaporized fuel within the vapor tapping enclosure 102. For the vapor tapping enclosure 102 with the cylindrical profile and circular cross section, the plate member 108 is defined with a circular profile and has a diameter larger than the diameter of the vapor tapping enclosure 102. Such a construction ensures to seal the vapor tapping enclosure 102 thoroughly. In the present embodiment, an outer diameter of the plate member is 26mm and the thickness is 2mm. In an embodiment, the plate member 108 is mounted on the vapor tapping enclosure 102 via conventional mounting techniques such as adhesive bonding, welding and the like.

[028] The assembly 100 further includes a vapor discharge tube 106 having a first end 106a coupled to the vapor tapping enclosure 102 and a second end 106b coupled to a canister 206. The vapor discharge tube 106 is adapted to route the vaporized fuel received by the vapor tapping enclosure 102 into the canister 206 for adsorbing the vaporized fuel. The first end 106a of the vapor discharge tube 106 is aligned axially to the central axis A-A’. Also, a portion of the vapor discharge tube 106 at the first end 106a is inserted within the vapor tapping enclosure 102. Such a construction of the vapor discharge tube 106 works in tandem with the one or more openings 104 such that, the vaporized fuel upon entering the one or more openings 104 into the vapor tapping enclosure 102 is instantaneously routed into the vapor discharge tube 106. This is due to alignment of the one or more openings 104 which ensures that the vaporized fuel is directed upwardly or axially to the vapor tapping enclosure 102 and the alignment of the first end 106a ensures to instantaneously receive the directed vaporized fuel.

[029] In an embodiment, the vapor discharge tube 106 is routed from the top inside surface 202a of the fuel tank 202 for coupling with the canister 206. As such, the top inside surface 202a may be defined with a hole (not shown) for routing the vapor discharge tube 106 through the top inside surface 202a for coupling with the canister 206. Suitable sealing means are attached around the hole for preventing leakage of fuel from the fuel tank 202.

[030] In an embodiment, the mounting bracket 110 engages with the vapor discharge tube 106 for supporting the vapor tapping enclosure 102 proximal to the filler neck 204 (as shown in Figure 3). Such a construction of positioning the vapor tapping enclosure 102 is provided to prevent contact of liquid fuel in the fuel tank 202 during a roll over condition of the vehicle 200.

[031] In an embodiment, the vapor discharge tube 106 forms a S-shaped profile upon coupling with the canister 206 and the vapor tapping enclosure 102. In an embodiment, the vapor discharge tube 106 is made of a metallic material, a non-metallic material or a composite material as per requirement. In another embodiment, an outer diameter of the vapor discharge tube 106 is 6 mm, while an inner diameter is about 4.6mm. Alternatively, the shape, configuration and dimensions of the vapor discharge tube 106 can vary as per requirement.

[032] In an embodiment, the canister 206 is a tubular member mounted below the fuel tank 202 (as shown in Figure 1 ) and includes activated carbon material capable of adsorbing the vaporized fuel.

[033] In an embodiment, due to the smaller dimensions of the assembly 100 as mentioned above, the contact surface area available for the vaporized fuel is reduced, thereby preventing condensation of the vaporized fuel within the vapor tapping enclosure 102 and consequently preventing entry of liquid fuel into the canister 206.

[034] In an operational embodiment, upon generation of the vaporized fuel due to heating of the fuel tank 202, the vaporized fuel is received by the one or more openings 104 and the plate member 110 traps the vaporized fuel within the vapor tapping enclosure 102. Due to vertical orientation of the one or more openings 104, the vaporized fuel is routed vertically into the vapor tapping enclosure 102. At this instance, the first end 106a of the vapor discharge tube 106 being axially aligned with the vapor tapping enclosure 102, instantaneously routes the vaporized fuel into the canister 206 for adsorption, thereby preventing routing of the vaporized fuel into ambient air.

[035] Referring to Figures 6 and 7 in conjunction with Figures 4 and 5, the operation of the assembly 100 during a vehicle roll over condition or a tipping condition 208 is depicted. During the tipping condition 208, the vehicle 200 is inclined beyond a predetermined angle, which may be 45 degrees about the top-bottom direction of the vehicle 200. Consequently, the fuel tank 202 also tilts along with the vehicle 200. In this scenario, due to the position of the vapor tapping enclosure 102 and due to smaller dimensions of the assembly 100, contact of the one or more openings 104 with the liquid fuel 238 is prevented. Thus, preventing entry of liquid fuel 238 into the assembly 100 even during tipping condition 208, thereby mitigating the requirement of a roll over valve (not shown), which is included in conventional vapor trap assemblies.

[036] In an embodiment, baffle plates (not shown) are disposed inside the fuel tank 202, particularly, near a fuel pump zone (not shown) in the fuel tank 202. The baffle plates eliminate fuel slosh in the fuel pump zone, while also acting as a barrier for reducing acceleration of movement of fuel due to inertia, during vehicle acceleration/deceleration of the vehicle 200. Additionally, the baffle plates also delay fuel passage across the fuel pump and thus provide additional time for fuel suction in the fuel tank 202. In an embodiment, two parallel vertical baffle plates are mounted within the fuel tank. The two parallel vertical baffle plates create an enclosed area to avoid fuel sloshing. In another embodiment, the fuel pump is located at a predetermined distance from the baffle plates.

[037] The claimed invention as discussed above is not routine, conventional, or well understood in the art, as the claimed aspects enable the following solutions to the existing problems in conventional technologies. Specifically, the claimed aspect of the one or more openings 104 aligned axially (or parallelly) to the central axis A-A’ of the vapor tapping enclosure 102, facilitates direct entry of the vaporized fuel into the vapor tapping enclosure 102, while minimizing contact with inner wall surfaces of the vapor tapping enclosure 102. Thus, reducing condensation of the vaporized fuel within the vapor tapping enclosure 102 and consequently preventing entry of liquid fuel into the canister 206. Also, the cylindrical profile of the vapor tapping enclosure 102, particularly the vertical orientation of the cylindrical profile about the vehicle 200, also reduces contact surface area for the vaporized fuel during travel from the fuel tank 202 to the vapor tapping enclosure 102 for reducing the condensation of the vaporized fuel. Further, the orientation of the first end 106a of the vapor discharge tube 106 works in tandem with the one or more openings 104 such that, the vaporized fuel upon entering the one or more openings 104 into the vapor tapping enclosure 102 is instantaneously routed into the vapor discharge tube 106. This is due to alignment of the one or more openings 104 which ensures that the vaporized fuel is directed upwardly or axially to the vapor tapping enclosure 102 and the alignment of the first end 106a ensures to instantaneously receive the directed vaporized fuel. Such a construction prevents formation of residual fuel within the vapor tapping enclosure 102. Also, due to mounting of the vapor tapping enclosure 102 by the mounting bracket 110 and due to smaller dimensions of the assembly 100, contact of the one or more openings 104 with the liquid fuel 238 is prevented. Thus, preventing entry of liquid fuel 238 into the assembly 100 even during tipping condition 208, thereby mitigating the requirement of a roll over valve (not shown), which is included in conventional vapor trap assemblies. Additionally, mounting of baffle plates within the fuel tank 202 eliminates sloshing of fuel, particularly in the fuel pump zone. Such a construction, ensures availability of fuel within the fuel tank in the fuel pump zone, thereby avoiding a dry run condition of the vehicle 200.

[038] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims. Reference numerals

100 - Vapor trap assembly

102 - Vapor tapping enclosure

102a - Flat bottom surface of the Vapor tapping enclosure 104 - One or more openings

106 - Vapor discharge tube

106a - First end of the vapor discharge tube

106b - Second end of the vapor discharge tube

108 - Plate member

110 - Mounting bracket

200 - Two-wheeled vehicle

202 - Fuel tank

202a - Top inside surface

202b - Top outer surface

204 - Filler neck

206 - Canister

208 - Tilted condition

210 - Internal combustion engine

210a - Headpipe

212 - Front wheel

214 - Rear wheel

216 - Seat

218 - Front fender

220 - Telescopic suspension unit

222 - Handlebar

224 - Headlight

226 - Visor guard

228 - Grab rail

230 - Rear fender

232 - Rear swing arm

234 - Rear suspension

236 - Taillight unit

238 - Liquid fuel in fuel tank

Claims

CLAIMS:

1 . A vapor trap assembly (100) for a fuel tank (202) of a vehicle (200), the assembly (100) comprising: a vapor tapping enclosure (102) disposed within the fuel tank (202) and positioned proximal to a filler neck (204) of the fuel tank (202), the vapor tapping enclosure (102) defined with one or more openings (104) for receiving vaporized fuel from the fuel tank (202); and a vapor discharge tube (106) having a first end (106a) coupled to the vapor tapping enclosure (102) and a second end (106b) coupled to a canister (206), wherein the vapor discharge tube (106) is adapted to route the vaporized fuel received by the vapor tapping enclosure (102) into the canister (206) for adsorbing the vaporized fuel.

2. The assembly (100) as claimed in claim 1 comprises a plate member (108) mounted on the vapor tapping enclosure (102), the plate member (108) adapted to entrap the vaporized fuel within the vapor tapping enclosure (102).

3. The assembly (100) as claimed in claim 1 , wherein the vapor discharge tube (106) is routed from a top inside surface (202a) of the fuel tank (202) for coupling with the canister (206).

4. The assembly (100) as claimed in claim 1 , wherein the vapor tapping enclosure (102) is defined with a cylindrical profile having a flat bottom surface (102a), the cylindrical profile adapted to reduce contact surface area for the vaporized fuel to reduce condensation.

5. The assembly (100) as claimed in claim 4, wherein the one or more openings (104) are defined on the flat bottom surface (102a) of the vapor tapping enclosure (102), the one or more openings (104) being aligned axially to the vapor tapping enclosure (102).

6. The assembly (100) as claimed in claim 4, wherein the first end (106a) of the vapor discharge tube (106) is oriented axially to the vapor tapping enclosure (102) during coupling.

7. The assembly (100) as claimed in claim 1 , wherein the vapor tapping enclosure (102) is supported proximal to the filler neck (204) of the fuel tank (202) by a mounting bracket (1 10), wherein the vapor tapping enclosure (102) is supported such that, entry of fuel from the fuel tank into the vapor tapping enclosure through the one or more openings is prevented during a tilted condition (208) of the vehicle.

8. A Two-wheeled Vehicle (200), the vehicle (200) comprising: a frame member; a fuel tank (202) mounted on the frame member, and a vapor trap assembly (100) for the fuel tank (202), the assembly (100) comprising: a vapor tapping enclosure (102) disposed within the fuel tank (202) and positioned proximal to a filler neck (204) of the fuel tank (202), the vapor tapping enclosure (102) defined with one or more openings (104) for receiving vaporized fuel from the fuel tank (202); and a vapor discharge tube (106) having a first end (106a) coupled to the vapor tapping enclosure (102) and a second end (106b) coupled to a canister (206), wherein the vapor discharge tube (106) is adapted to route the vaporized fuel received by the vapor tapping enclosure (102) into the canister (206) for adsorbing the vaporized fuel.

9. The vehicle (200) as claimed in claim 8 comprises a plate member (108) mounted on the vapor tapping enclosure (102), the plate member (108) adapted to entrap the vaporized fuel within the vapor tapping enclosure (102).

10. The vehicle (200) as claimed in claim 8, wherein the vapor discharge tube (106) is routed from a top inside surface (202b) of the fuel tank (202) for coupling with the canister (206).

1 1. The vehicle (200) as claimed in claim 8, wherein the vapor tapping enclosure (102) is defined with a cylindrical profile having a flat bottom surface (102a), the cylindrical profile (102) adapted to reduce contact surface area for the vaporized fuel to reduce condensation.

12. The vehicle (200) as claimed in claim 11 , wherein the one or more openings (104) are defined on the flat bottom surface (102a) of the vapor tapping enclosure (102), the one or more openings (104) being aligned axially to the vapor tapping enclosure (102).

13. The vehicle (200) as claimed in claim 11 , wherein the first end (106a) of the vapor discharge tube (106) is oriented axially to the vapor tapping enclosure (102) during coupling. The vehicle (200) as claimed in claim 8, wherein the vapor tapping enclosure (102) is supported proximal to the filler neck (204) of the fuel tank (202) by a mounting bracket (1 10), wherein the vapor tapping enclosure (102) is supported such that, entry of fuel from the fuel tank into the vapor tapping enclosure through the one or more openings is prevented during a tilted condition (208) of the vehicle (200). The vehicle (200) as claimed in claim 8, wherein the fuel tank (202) is a metallic fuel tank.