Claims:WE CLAIM:
1. A fuel vapour emission control system (200) for a motor vehicle, comprising:
a fuel tank (210);
a fuel inlet assembly (220) having a fuel inlet opening (222) for providing fuel to the fuel tank (210), and a fuel inlet tube (224) for connecting the fuel inlet opening (222) to the fuel tank (210);
a housing (230) provided on the fuel inlet tube (224), the housing (230) having an inlet (232) for receiving fuel vapours from the fuel tank (210), fuel vapour adsorbing particles (236), and an outlet (234) allowing for exit of the adsorbed fuel vapours; and
an openable cover member (240) for covering one end of the housing (230).

2. The fuel vapour emission control system (200) as claimed in claim 1, wherein the housing (230) extends between a first end (230A) having the inlet (232) and the outlet (234), and a second end (230B) configured to receive the cover member (240).

3. The fuel vapour emission control system (200) as claimed in claim 1, wherein the cover member (240) comprises a vent opening (242) for relieving pressure and vacuum inside the housing (230) and for providing an exit to liquid fuel accumulated in the housing (230).

4. The fuel vapour emission control system (200) as claimed in claim 3, wherein the cover member (240) comprises a filter (244) arranged to filter air or liquid exiting through the vent opening (242).

5. The fuel vapour emission control system (200) as claimed in claim 3 or 4, comprises a breather hose (246) coupled with the vent opening (242) at one end, and another end of the breather hose (246) is left open.

6. The fuel vapour emission control system (200) as claimed in claim 1, comprises a purge control valve (250) coupled with the outlet (234) for controlling flow rate of fuel vapours purged inside the housing (230).

7. The fuel vapour emission control system (200) as claimed in claim 6, comprising a first purge pipe (252) connected between the outlet (234) and the purge control valve (250), and a second purge pipe (254) connected to the purge control valve (250) for supplying the purged fuel vapour to an engine (125).

8. The fuel vapour emission control system (200) as claimed in claim 6, wherein the purge control valve (250) is mounted on the housing (230).

9. The fuel vapour emission control system (200) as claimed in claim 1 or 2, comprising a charge pipe (238) connected between the inlet (232) and the fuel inlet assembly (220) for supplying fuel vapours from the fuel tank (210) to the housing (230).

10. The fuel vapour emission control system (200) as claimed in claim 1, wherein the housing (230) is provided on an outer periphery of the fuel inlet tube (224).

11. The fuel vapour emission control system (200) as claimed in claim 1, wherein the housing (230) is provided on the fuel inlet tube (224) such that the housing (230) and the fuel inlet tube (224) share a common vertical plane (A-A’).

12. The fuel vapour emission control system (200) as claimed in claim 1 or 11, wherein the inlet (232) and outlet (234) are disposed adjoining each other, extending along the common vertical plane (A-A’) of the housing (230) and the fuel inlet tube (224).

13. The fuel vapour emission control system (200) as claimed in claim 5 or 11, wherein the vent opening (242) is along the common vertical plane (A-A’).

14. The fuel vapour emission control system (200) as claimed in claim 6 or 10, wherein the housing (230) comprises a holding member (260) extending outwardly from the outer periphery of the housing (230), for mounting the purge control valve (250).

15. A saddle-type vehicle (10), comprising;
a head pipe (105A);
a main frame (105B) extending rearwardly and downwardly of the head pipe (105A);
a front panel (160A) disposed forwardly of the head pipe (105A) in a vehicle front-rear direction;
a rear panel (160E) disposed rearwardly of the head pipe (105B) in the vehicle front-rear direction, the rear panel (160E) configured to define a space therebetween with the front panel (160A); and
a fuel vapour emission control system (200) having a fuel inlet opening (222) for providing fuel to a fuel tank (210); a fuel inlet tube (224) for connecting the fuel inlet opening (224) to the fuel tank (210); a housing (230) provided on the fuel inlet tube (224), the housing (230) having an inlet (232) for receiving fuel vapours from the fuel tank (210), fuel vapour adsorbing particles (236), and an outlet (234) allowing for exit of the adsorbed fuel vapours; and an openable cover member (240) for covering one end of the housing (230), the fuel vapour emission control system (200) disposed in the space defined by the front panel (160A) and the rear panel (160E) therebetween.

16. The saddle-type vehicle (10) as claimed in claim 15, wherein the fuel vapour emission control system (200) is disposed in the space defined by the front panel (160A) and the rear panel (160E), on a left-hand side of the main frame (105B) in a vehicle front view.

17. The saddle-type vehicle (10) as claimed in claim 15, wherein the fuel vapour emission control system (200) is disposed in the space defined by the front panel (160A) and the rear panel (160E), on a right-hand side of the main frame (105B) in the vehicle front view.

18. The saddle-type vehicle (10) as claimed in claim 15, wherein the housing (230) extends between a first end (230A) having the inlet (232) and the outlet (234), and a second end (230B) configured to receive the cover member (240).

19. The saddle-type vehicle (10) as claimed in claim 15, wherein the housing (230) is disposed substantially vertically such that a height of the first end (230A) of the housing (230) from a ground level is greater than a height of the second end (230B) of the housing (230) from the ground level.

20. The saddle-type vehicle (10) as claimed in claim 15 or 18, wherein the cover member (240) comprises a vent opening (242) facing towards the ground thereby allowing for the liquid fuel accumulated in the housing (230) to be discharged out of the vehicle (10) on the ground.

21. An integrated fuel inlet structure (300), comprising:
a fuel inlet opening (222) for providing fuel to a fuel tank (210);
a fuel inlet tube (224) for connecting the fuel inlet opening (222) to the fuel tank (210);
a housing (230) provided on the fuel inlet tube (224), the housing (230) having an inlet (232) for receiving fuel vapours from the fuel tank (210), fuel vapour adsorbing particles (236), and an outlet (234) allowing for exit of the adsorbed fuel vapours; and
an openable cover member (240) for covering one end of the housing (230).

22. The integrated fuel inlet structure (300) as claimed in claim 21, wherein the housing (230) comprises a holding member (260) extending outwardly from an outer periphery of the housing (230), for mounting a purge control valve (250).

23. The integrated fuel inlet structure (300) as claimed in claim 21, wherein the housing (230) is provided on the fuel inlet tube (224) such that the housing (230) and the fuel inlet tube (224) share a common vertical plane (A-A’).

24. The integrated fuel inlet structure (300) as claimed in claim 21 or 23, wherein the inlet (232) and outlet (234) are disposed adjoining each other, extending along the common vertical plane (A-A’) of the housing (230) and the fuel inlet tube (224).
, Description:FIELD OF THE INVENTION
[001] The present invention relates to a fuel vapour emission control system.

BACKGROUND OF THE INVENTION
[002] In evaporative emission control systems (EVAP) of conventional two-wheeled vehicles, fuel vapours generated in a fuel tank is tapped and passed to a canister containing carbon layers through a discharge tube. The vapours get adsorbed in the carbon layers inside the canister. The adsorbed vapours are then sent to an engine for combustion. However, the amount of carbon required to carry out effective vapour adsorption in a canister depends on the fuel tank volume and hence, it varies from vehicle to vehicle.
[003] Further, usage a standard canister with a standard volume of carbon for different fuel tanks may add more cost to a particular vehicle, especially the vehicle which requires lesser carbon volume than the standard canister to carry out effective vapour adsorption. Furthermore, usage of different standardised canisters for different vehicles creates more part counts and thus increases the cost and impact serviceability and assembly.
[004] Furthermore, mounting of a canister is limited as the mounting needs to be done in a manner that the canister is protected from environmental disturbances, without affecting the functionality and serviceability of adjacent and interfacing vehicle parts. Further, the carbon canister needs to be provided in a safe location in the vicinity of the fuel tank to improve performance and improving fire safety. The vehicle layout constraints and space limitations severely limit the packaging of the canister and its supporting components.
[005] Another challenge in the conventional EVAP systems is that vapour generation from the fuel tank continues even when the vehicle is in off condition. Hence, the hose from fuel tank to canister always carries fuel vapours as long as there is fuel is available inside the fuel tank. Especially during cold climate or vehicle getting exposed to temperature less than room temperature, vaporized fuel stored in canister gets condensed which results in flooding of the canister. Once the canister is flooded, the canister ceases to perform its function of adsorption.
[006] Thus, there is a need in the art for a fuel vapour emission control system which addresses at least the aforementioned problems.

SUMMARY OF THE INVENTION
[007] In one aspect, the present invention is directed to a fuel vapour emission control system for a motor vehicle. The system has a fuel tank, a fuel inlet assembly having a fuel inlet opening for providing fuel to the fuel tank and a fuel inlet tube for connecting the fuel inlet opening to the fuel tank, and a housing provided on the fuel inlet tube. The housing has an inlet for receiving fuel vapours from the fuel tank, fuel vapour adsorbing particles for adsorbing the fuel vapours emitted from the fuel tank, and an outlet allowing for exit of the adsorbed fuel vapours. Further the fuel vapour emission system has an openable cover member for covering one end of the housing.
[008] In an embodiment of the invention, the housing extends between a first end having the inlet and the outlet, and a second end which is configured to receive the cover member.
[009] In another embodiment of the invention, the cover member has a vent opening for relieving pressure and vacuum inside the housing and for providing an exit to liquid fuel accumulated in the housing. The cover member further has a filter arranged to filter air or liquid exiting through the vent opening and a breather hose coupled with the vent opening at one end, and another end of the breather hose is left open.
[010] In another embodiment of the invention, a purge control valve is coupled with the outlet for controlling flow rate of fuel vapours purged inside the housing. Further, a first purge pipe is connected between the outlet and the purge control valve, and a second purge pipe is connected to the purge control valve for supplying the purged fuel vapour to an engine.
[011] In another embodiment of the invention, the purge control valve is mounted on the housing.
[012] In another embodiment of the invention, a charge pipe is connected between the inlet and the fuel inlet assembly for supplying fuel vapours from the fuel tank to the housing.
[013] In a further embodiment of the invention, the housing is provided on an outer periphery of the fuel inlet tube.
[014] In a further embodiment of the invention, the housing is provided on the fuel inlet tube such that the housing and the fuel inlet tube share a common vertical plane. Further, the inlet and outlet are disposed adjoining each other on the housing, extending along the common vertical plane of the housing and the fuel inlet tube and the vent opening is provided along the common vertical plane.
[015] In a further embodiment of the invention, the housing has a holding member extending outwardly from the outer periphery of the housing, for mounting the purge control valve.
[016] In another aspect, the present invention relates to a saddle-type vehicle having a head pipe, a main frame extending rearwardly and downwardly of the head pipe, a front panel disposed forwardly of the head pipe in a vehicle front-rear direction, a rear panel disposed rearwardly of the head pipe in the vehicle front-rear direction. The rear panel is configured to define a space therebetween with the front panel. The saddle type vehicle further has a fuel vapour emission control system having a fuel inlet opening for providing fuel to a fuel tank, a fuel inlet tube for connecting the fuel inlet opening to the fuel tank, a housing provided on the fuel inlet tube, the housing having an inlet for receiving fuel vapours from the fuel tank, fuel vapour adsorbing particles, and an outlet allowing for exit of the adsorbed fuel vapours, and an openable cover member for covering one end of the housing. The fuel vapour emission control system is disposed in the space defined by the front panel and the rear panel therebetween.
[017] In an embodiment of the invention, the fuel vapour emission control system is disposed in the space defined by the front panel and the rear panel, on a left-hand side of the main frame in a vehicle front view.
[018] In an alternative embodiment of the invention, the fuel vapour emission control system is disposed in the space defined by the front panel and the rear panel, on a right-hand side of the main frame in the vehicle front view.
[019] In an embodiment of the invention, the housing extends between a first end having the inlet and the outlet, and a second end configured to receive the cover member. Further, the housing is disposed substantially vertically such that a height of the first end of the housing from a ground level is greater than a height of the second end of the housing from the ground level and the cover member has a vent opening facing towards the ground thereby allowing for the liquid fuel accumulated in the housing to be discharged out of the vehicle on the ground.
[020] In another aspect, the present invention relates to an integrated fuel inlet structure having a fuel inlet opening for providing fuel to a fuel tank, a fuel inlet tube for connecting the fuel inlet opening to the fuel tank, a housing provided on the fuel inlet tube. The housing has an inlet for receiving fuel vapours from the fuel tank, fuel vapour adsorbing particles, and an outlet allowing for exit of the adsorbed fuel vapours. The fuel inlet structure further has an openable cover member for covering one end of the housing.
[021] In an embodiment of the invention, the housing has a holding member extending outwardly from an outer periphery of the housing, for mounting a purge control valve.
[022] In a further embodiment of the invention, the housing is provided on the fuel inlet tube such that the housing and the fuel inlet tube share a common vertical plane, and the inlet and outlet are disposed adjoining each other, extending along the common vertical plane of the housing and the fuel inlet tube.

BRIEF DESCRIPTION OF THE DRAWINGS
[023] 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 shows a right-side view of an exemplary saddle-type vehicle in accordance with an embodiment of the invention.
Figure 2 shows a perspective view of a fuel vapour emission control system in accordance with an embodiment of the invention.
Figure 3 shows another perspective view of the fuel vapour emission control system in accordance with an embodiment of the invention.
Figure 4 illustrates a cover member in accordance with an embodiment of the invention.
Figure 5 shows an exploded view of the fuel vapour emission control system in accordance with an embodiment of the invention.
Figures 6A and 6B show a sectional view and the section of the fuel vapour emission control system in accordance with an embodiment of the invention.
Figure 7 illustrates the saddle-type vehicle with the fuel vapour emission control system in accordance with an embodiment of the invention.
Figure 8 illustrates an integrated fuel inlet structure in accordance with an embodiment of the invention.

DETAILED DESCRIPTION OF THE INVENTION
[024] The present invention relates to a fuel vapour emission control system. More particularly, the present invention relates to a fuel vapour emission control for a saddle-type vehicle.
[025] Figure 1 illustrates a right-side view of an exemplary saddle-type vehicle 10, in accordance with an embodiment of the present subject matter. The vehicle 10 comprises a frame assembly 105. The frame assembly 105 includes a head pipe 105A, a main frame 105B. One or more front suspensions 110 connect a front wheel 115 to a handlebar assembly 190, which forms a steering assembly of the vehicle 10. The steering assembly is rotatably disposed about the head pipe 105A. The main frame 105B extends rearwardly downward from the head pipe 105A and includes a bent portion thereafter extending substantially in a longitudinal direction. Further, the frame assembly 105 includes one or more rear tubes 105C extending inclinedly rearward from a rear portion of the main frame 105B towards a rear portion of the vehicle 10.
[026] The vehicle 10 includes a power unit comprising at least one of an internal combustion (IC) engine 125. The power unit is coupled to the rear wheel 145. In one embodiment, the engine 125 is swingably connected to the frame assembly 105. In one embodiment, the engine 125 is mounted to the swing arm (not shown) and the swing arm is swingably connected to the frame assembly 105. Further, the vehicle 10 includes a transmission means (not shown) coupling the rear wheel 145 to the power unit. The transmission means includes a continuously variable transmission, an automatic transmission, or a fixed ratio transmission. A seat assembly 151 is disposed above the power unit and is supported by the rear tubes 105C of the frame assembly 105. The seat assembly 151 is hingedly openable. The frame assembly 105 defines a step-through portion ahead of the seat assembly 151. A floorboard 155 is disposed at the step-through portion, wherein a rider can operate the vehicle 10 in a seated position by resting feet on the floorboard 155. Further, the floorboard 155 is capable of carrying loads.
[027] Further, the frame assembly 105 is covered by plurality of body panels including a front panel 160A, a leg shield 160B, an under-seat cover 160C, a left and a right-side panel 160D, and a rear panel 160E mounted on the frame assembly 105 and covering the frame assembly 105 and parts mounted thereof.
[028] In addition, a front fender 165 is covering at least a portion of the front wheel 115. A utility box is disposed below the seat assembly 151 and is supported by the frame assembly 105. A rear fender 175 is covering at least a portion of the rear wheel 145 and is positioned upwardly of the rear wheel 145. One or more suspension(s) (not shown) are provided in the rear portion of the vehicle 10 for connecting the swing arm 141 and the rear wheel 145 to the frame assembly 105 for damping the forces from the wheel 145 and the power unit from reaching the frame assembly 105.
[029] Furthermore, the vehicle 10 comprises of plurality of electrical and electronic components including a headlight 185A, a taillight 185B, a transistor-controlled ignition (TCI) unit (not shown), and an alternator (not shown), a starter motor (not shown).
[030] Figure 2 shows a perspective view of a fuel vapour emission control system 200 for a motor vehicle. As shown in Figure 2, the fuel vapour emission control system 200 has a fuel tank 210. The fuel vapour emission control system 200 further has a fuel inlet assembly 220 with a fuel inlet opening 222 for providing fuel to the fuel tank 210, and a fuel inlet tube 224 for connecting the fuel inlet opening 222 to the fuel tank 210. The fuel vapour emission control system 200 further has a housing 230 provided on the fuel inlet tube 224, with an inlet 232 for receiving emitted fuel vapours from the fuel tank 210 which are adsorbed by fuel vapour adsorbing particles 236 (shown in Figure 5) housed inside the housing 230. The housing 230 further has an outlet 234 allowing for the exit of the adsorbed fuel vapours from the housing 230 towards the engine 125. The fuel vapour emission control system 200 further has an openable cover member 240 for covering one end of the housing 230.
[031] The cover member 240 allows alteration in the quantity of fuel vapour adsorbing particles 236 housed inside the housing 230. Accordingly, depending on the size of the fuel tank 210, amount of fuel vapour adsorbing particles may be altered. If the fuel tank 210 is of a larger size, more fuel vapours are generated and hence more fuel vapour adsorbing particles 236 are required for adsorption. In this regard, the openable cover member 240 is opened from one end of the housing 230 to increase the quantity of the fuel vapour adsorbing particles 236 in the housing 230 and then, the openable cover member 240 is placed on one end of the housing 230 thereby sealing the housing 230. Conversely, If the fuel tank 210 is of a smaller size, less fuel vapours are generated and hence less fuel vapour adsorbing particles 236 are required for adsorption. In this regard, the openable cover member 240 is opened from one end of the housing 230 to decrease the quantity of the fuel vapour adsorbing particles 236 in the housing 230 and then, the openable cover member 240 is placed on end of the housing 230, thereby sealing the housing 230.
[032] In an embodiment of the invention, as shown in Figure 2, the housing 230 is provided on an outer periphery of the fuel inlet tube 224.
[033] As further illustrated in Figure 3, and referenced in Figure 2, the housing 230 extends between a first end 230A, and a second end 230B wherein the first end 230A has the inlet 232 and the outlet 234, and the second end 230B is configured to receive the cover member 240. In that, a charge pipe 238 is connected between the inlet 232 and the fuel inlet assembly 220 for supplying fuel vapours from the fuel tank 210 to the housing 230. In an embodiment of the invention, one end of the charge pipe 238 is provided at the fuel inlet opening 222 to receive the fuel vapours emitted from the fuel tank 210, and the other end of the charge pipe 238 is connected at the inlet 232 for supplying the fuel vapours entering the charge pipe 238 from the fuel inlet opening 222 to the housing 230, where the fuel adsorbing particles 236 adsorb the emitted fuel vapours.
[034] Further, a first purge pipe 252 is connected between the outlet 234 of the housing 230 and a purge control valve 250, and a second purge pipe 254 is connected to the purge control valve 250 for supplying the purged fuel vapour to the engine 125. Thereby, the purge control valve 250 is coupled with the outlet 234 wherein the purge control valve 250 controls flow rate of the fuel vapours purged inside the housing 230 to the engine 125.
[035] Figure 4 illustrates a perspective view of the openable cover member 240. As illustrated in Figure 4, the cover member 240 has a vent opening 242 for relieving pressure and vacuum inside the housing 230 and for providing an exit to liquid fuel accumulated in the housing 230 on condensation of the fuel vapours. In that, a breather hose 246 (shown in Figure 2) is coupled with the vent opening 242 at one end, and another end of the breather hose 246 is left open for allowing the exit of accumulated liquid fuel in the housing 230 to be discharged on to the ground. Further, the cover member 240 has a filter 244 (shown in Fig. 5) arranged in a slot 248 of the cover member 240 to filter air or liquid exiting through the vent opening 242.
[036] Figure 5 illustrates an exploded view of the fuel vapour control emission system 200. As illustrated in Figure 5, an air filter 245 is provided inside the housing 230 adjacent to the inlet 232 and the outlet 234 for filtering the fuel vapours entering the housing 230 through the charge pipe 238 and exiting the housing 230 through the first purge pipe 254 respectively. The fuel vapour adsorbing particles 236 are packaged subsequent to the air filter 245, with the openable cover member 240 having the filter 244 and the vent opening 242 covering the second end 230B of the housing 230 subsequent to the fuel vapour adsorbing particles 236.
[037] As further illustrated in Figure 5, the purge control valve 250 is mounted on the housing 230. In an embodiment of the invention, the housing 230 comprises a holding member 260 extending outwardly from an outer periphery of the housing 230, and the purge control valve 250 is mounted on the holding member 260.
[038] Figure 6A illustrates a sectional view of the fuel vapour emission control system 200 along a common vertical plane (A-A’). As illustrated in Figure 6A and further illustrated in Figure 6B, the housing 230 is provided on the fuel inlet tube 224 such that the housing 230 and the fuel inlet tube 224 share the common vertical plane (A-A’). In an embodiment of the invention, the inlet 232 and outlet 234 are disposed adjoining each other, extending along the common vertical plane (A-A’) of the housing 230 and the fuel inlet tube 224. In another embodiment of the invention, the vent opening 242 is also provided along the common vertical plane (A-A’).
[039] In another aspect of the invention, as illustrated in Figure 7, the fuel vapour emission control system 200 is provided on the saddle-type vehicle 10. As shown in Figure 1, the saddle-type vehicle 10 comprises the head pipe 105A and the main frame 105B extending rearwardly and downwardly of the head pipe 105A. The front panel 160A is disposed forwardly of the head pipe 105A in a vehicle front-rear direction and the rear panel 160E is disposed rearwardly of the head pipe 105A in the vehicle front-rear direction. The rear panel 160E is configured to define a space therebetween with the front panel 160A. As shown in Figure 5, the fuel vapour emission control system 200 is disposed in the space defined by the front panel 160A and the rear panel 160E therebetween, thereby enclosing the fuel vapour emission control system 200 away from environmental disturbances. As mentioned hereinbefore and illustrated in Figures 1-6, the fuel vapour emission control system 200 has the fuel tank 210. The fuel vapour emission control system 200 further has the fuel inlet assembly 220 with the fuel inlet opening 222 for providing fuel to the fuel tank 210, and the fuel inlet tube 224 for connecting the fuel inlet opening 222 to the fuel tank 210. The fuel vapour emission control system 200 further has the housing 230 provided on the fuel inlet tube 224, with the inlet 232 for receiving emitted fuel vapours from the fuel tank 210 which are adsorbed by the fuel vapour adsorbing particles 236 housed inside the housing 230. The housing 230 further has the outlet 234 allowing for the exit of the adsorbed fuel vapours from the housing 230 towards the engine 125. The fuel vapour emission control system 200 further has the openable cover member 240 for covering one end of the housing 230, thereby allowing for alteration in the quantity of fuel vapour adsorbing particles 236 inside the housing 230 depending on the size of the fuel tank 210.
[040] In an embodiment of the invention, the fuel tank 210 is disposed under the floorboard 155 of the vehicle, thereby allowing the emitted fuel vapours from the fuel tank 210 to rise in the fuel inlet tube 224.
[041] In an embodiment of the invention, the fuel vapour emission control system 200 is disposed in the space defined by the front panel 160A and the rear panel 160E, on a left-hand side of the main frame 105B in a vehicle front view. In an alternative embodiment of the invention, the fuel vapour emission control system 200 is disposed in the space defined by the front panel 160A and the rear panel 160E, on a right-hand side of the main frame 105B in the vehicle front view.
[042] In embodiment of the invention, the housing 230 is disposed substantially vertically such that a height of the first end 230A of the housing 230 from a ground level is greater than a height of the second end 230B of the housing 230 from the ground level, hence allowing for any accumulated fuel in the housing 230 to move towards the second end 230B and subsequently to the cover member 240, assisted by gravity. Further, the cover member 240 having the vent opening 242, faces towards the ground thereby allowing for the liquid fuel accumulated in the housing 230 to be discharged out of the vehicle 10 on to the ground.
[043] In another aspect of the invention, as illustrated in Figure 8, the fuel inlet opening 222, the fuel inlet tube 224 for connecting the fuel inlet opening 222 to the fuel tank 210, the housing 230 provided on the fuel inlet tube 224, with the inlet 232 and the outlet 234 and the openable cover member 240 together form an integrated fuel inlet structure 300. The integrated fuel inlet structure 300 is configured to be adapted in the saddle-type vehicle 10.
[044] In an embodiment of the invention, the housing 230 is mounted on the outer periphery of the fuel inlet tube 224, thereby being integrated with the fuel inlet tube 224 by means of a plurality of ribs 302. Resultantly, the integrated fuel inlet structure 300 can be fabricated as a single unified entity.
[045] Advantageously, the fuel vapour emission control system of the present invention allows for the alteration of the quantity of vapour adsorbing particles for effective adsorption of fuel particles and purging, based on the size of the fuel tank thereby negating the requirement of using a standard canister for all fuel tank sizes and hence reducing the cost and improving serviceability and assembly of the fuel vapour emission system.
[046] Further, the fuel emission control system is provided in the saddle-type vehicle in a manner that the fuel vapour emission control system is protected from environmental disturbances and the accessibility and the serviceability of the adjacent parts is not impacted.
[047] Furthermore, the provision of the housing on the fuel inlet tube and integration of the housing on the fuel inlet tube by means of the ribs improves the durability of the fuel vapour emission control system and reduces the number of separate mechanical parts, bringing down the cost and improving serviceability, assembly and reliability.
[048] In addition, the provision of the breather assembly on the cover member of the fuel vapour emission control system ensures that no liquid fuel is accumulated in the housing due to condensation by discharging the liquid fuel from the housing, thereby improving the functionality of the fuel vapour emission control system under all climatic conditions, and increasing the life of the fuel vapour emission control system over conventional canisters.
[049] 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.

LIST OF REFERENCE NUMERALS
10 – Saddle-type vehicle
105 – Frame Assembly
105A – Head Pipe
105B – Main Frame
105C – Rear Tubes
115 – Front Wheel
125 – Engine
141 – Swing Arm
145 – Rear Wheel
151 – Seat Assembly
155 – Floorboard
160A – Front Panel
160B – Leg shield
160C – Under-seat cover
160D – Right-side panel
160E – Rear Panel
165 – Front Fender
175 – Rear Fender
185A – Headlight
185B – Taillight
200 – Fuel Vapour Emission Control System
210 – Fuel Tank
220 – Fuel Inlet Assembly
222 – Fuel Inlet Opening
224 – Fuel Inlet Tube
230 – Housing
230A – First end of the housing
230B – Second end of the housing
232 – Inlet
234 – Outlet
236 – Vapour Adsorbing Particles
238 – Charge Pipe
240 – Cover Member
242 – Vent Opening
244 – Filter
245 – Air Filter
246 – Breather Hose
248 – Slot in the Cover member
250 – Purge Control Valve
252 – First Purge Pipe
254 – Second Purge Pipe
260 – Holding Member
300 – Integrated Fuel Inlet Structure
302 – Ribs