Claims:I/We Claim:
1. A saddle-type vehicle (100) comprising:
a head pipe (200a);
a main tube (200b) extending rearwardly from said head pipe (200a); and
a fuel tank assembly (120) mounted above said main tube (200b);
wherein,
said fuel tank assembly (120) comprises a fuel tank inner (335) enveloping at least a portion of said main tube (200b); said fuel tank inner (335) comprising a first region (A) disposed on a left side of said main tube (200b) and a second region (B) disposed on a right side of said main tube (200b);
wherein,
an evaporative emission control sub-assembly (400) being disposed within said fuel tank inner (335);
wherein,
said evaporative emission control sub-assembly (400) comprises a canister (305), and one or more regulating means (300); and a plurality of hoses (345) connecting said canister (305) to said one or more regulating means (300).
2. The saddle-type vehicle (100) as claimed in claim 1, wherein said one or more regulating means (300) comprises a canister purge valve (300).
3. The saddle-type vehicle (100) as claimed in claim 1, wherein said one or more regulating means (300) comprises a roll-over valve.
4. The saddle-type vehicle (100) as claimed in claim 2, wherein said canister purge valve (300) being an electronic purge control valve.
5. The saddle-type vehicle (100) as claimed in claim 1, said evaporative emission control sub-assembly (400) being at least partially disposed on one of said first region (A) and said second region (B) of said fuel tank inner (335).
6. The saddle-type vehicle (100) as claimed in claim 1, wherein at least one region of said first region (A) and said second region (B) of said fuel tank inner (335) accommodates a fuel pump module (340).
7. The saddle-type vehicle (100) as claimed in claim 1 or claim 6, wherein said evaporative emission control sub-assembly (400) is primarily configured in at least one region of said first region (A) and said second region (B) of said fuel tank inner (335), which being a region other than the region that accommodates the fuel pump module (340).
8. The saddle-type vehicle (100) as claimed in claim 1, said canister being mounted to said fuel tank inner.
9. The saddle-type vehicle (100) as claimed in claim 1, wherein said one or more regulating means (300) are mounted to said fuel tank inner (335).
10. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, said canister purge valve (300) being mounted substantially above said canister (305) from a ground level when seen from said vehicle (100) side view.
11. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein said canister (305) is mounted between said canister purge valve (300) and said engine assembly (180).
12. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein said canister (305) being disposed on said second region (B) and said canister purge valve (300) is disposed on said first region (A).
13. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein said canister (305) and said canister purge valve (300) are disposed on said second region (B).
14. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein said canister (305) being disposed on said second region (B) and said canister purge valve (300) being disposed along a longitudinal center line (PP’) of said vehicle (100).
15. The saddle-type vehicle (100) as claimed in claim 1 or claim 3, wherein said canister (305) and said roll-over valve are disposed on said second region (B).
16. The saddle-type vehicle (100) as claimed in claim 1 or claim 3, wherein said canister (305) being disposed on said second region (B) and said roll-over valve being disposed along a longitudinal center line (PP’) of said vehicle (100).
17. The saddle-type vehicle (100) as claimed in claim 14, wherein said canister (305) being disposed substantially vertically inclined to said longitudinal center line (PP’) of said vehicle (100).
18. The saddle-type vehicle (100) as claimed in claim 2, wherein a canister purge valve mounting bracket (310) being provided with a mistake proofing feature.
19. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein at least a portion of the evaporative emission control sub-assembly (400) being disposed on one of said first region (A) and said second region B of said fuel tank inner (335).
20. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein at least one region of said first region (A) and said second region (B) of said fuel tank inner (335 accommodates a fuel pump module (340).
21. The saddle-type vehicle (100) as claimed in claim 1 or claim 2 or claim 3, wherein said canister (305) being mounted between said canister purge valve (300) and said engine assembly (180). , Description:Technical Field
[0001] The present subject matter described herein generally relates to a saddle type two or three wheeled vehicle, and particularly but not exclusively relates to a fuel tank assembly of a saddle type vehicle.
BACKGROUND
[0002] Conventionally, a canister purge valve is a vital part of the evaporative emission control system (EVAP) of a vehicle. The EVAP system seals the fuel system of the vehicle and prevents fuel vapor escaping in the atmosphere. This prevention of escaping of fuel vapor is done by absorbing harmful fuel vapors by trapping the fuel vapors from the fuel tank and temporarily storing them in a charcoal canister. During the working of the engine under certain conditions, the fuel vapors purge from the canister and are burnt inside the engine. The canister purge valve precisely controls the amount of fuel vapor that is purged from the canister.
[0003] In modern vehicles, the purge valve is an electrically-operated solenoid that is controlled by the engine software. When the engine is off, the purge valve is closed. When the engine is running and fully warmed up, the engine software gradually opens the purge valve to allow some amount of fuel vapors to be moved from the charcoal canister and burned in the engine. The purge flow is monitored by a number of sensors. If the purge flow is less or more than is expected under the conditions, the computer illuminates the "Check Engine" light.

BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The detailed description is described with reference embodiment of a two wheeled vehicle along with the accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[0005] Fig. 1 illustrates a left hand side view of a two wheeled vehicle, when viewed from left hand side of the rider while the rider is in riding position, in accordance with an embodiment of the present invention.
[0006] Fig. 2 illustrates a perspective view of a fuel tank assembly mounted on a frame assembly of a vehicle in accordance with an embodiment of the present invention.
[0007] Fig. 3a to Fig. 3b illustrates a perspective view of a fuel tank assembly mounted on a frame assembly of a vehicle in accordance with an embodiment of the present invention.
[0008] Fig. 3c to Fig. 3h illustrates a fuel tank assembly of a vehicle in accordance with an embodiment of the present invention. Fig. 3d illustrates a rear perspective view of the fuel tank assembly of a vehicle in accordance with an embodiment of the present invention. Fig. 3e illustrates a perspective view of the mounting of the canister purge valve in the metal fuel tank assembly of a vehicle in accordance with an embodiment of the present invention.
[0009] Fig. 3f to Fig. 3g illustrates perspective view of the fuel tank assembly as per an embodiment of the present subject matter. Fig. 3g shows the positioning of the canister purge valve and the canister on the frame assembly of the vehicle as per an embodiment of the present subject matter.
[00010] Fig. 4a to Fig. 4f illustrates number of perspective views of the fuel tank assembly as per an alternate embodiment of the present subject matter. Fig. 4f shows the positioning of the canister purge valve and the canister on the frame assembly of the vehicle as per an embodiment of the present subject matter.
[00011] Fig. 5a to Fig. 5f illustrates number of perspective views of the fuel tank assembly as per another alternate embodiment of the present subject matter.

DETAILED DESCRIPTION
[00012] Conventionally, in a saddle type vehicle, an air cleaner is located in an area enclosed by a plurality of frame members of the vehicle and a canister is arranged under the air cleaner. A purge valve pipe is connected to the canister and the canister is further connected to a carburetor through a canister purge valve.
[00013] Like several other automotive parts, over a period of time, dust and dirt clog the canister and such clogging further causes cracking of the canister purge valve and in some cases results in purge valve failure. Such canister purge valve failure negatively affects the vehicular emission output level. Therefore, ease in assembly and disassembly becomes a mandate with respect to the canister purge valves, to enable replacement of the canister purge valves when required. Also, recently because of the recent advancements, the canister purge valve is electrically operated and works by using electronic control unit (ECU) signals; which has in turn increased the complexity of the system in relation to its structure and mounting, and has therefore created a need of providing a separate mounting for the canister purge valve. Additionally, from safety point of view especially for a two wheeled saddle vehicle, which is vulnerable to capsize, there is a need to configure another regulating means called a roll-over valve to address the possibility of fuel spillage and potential fire hazard in the event of fall or capsize of the vehicle. As a result, configuring the additional regulating means like a canister purge valve or roll over valve separately makes the design of the vehicle difficult in terms of packaging to achieve a compact layout of the vehicle while still ensuring ease of assembly as well as ease of service. The position of the canister purge valve in such known arts is disclosed in front of the air cleaner.
[00014] Some known arts disclose about a canister being located in a recessed portion that is formed on a fuel tank inner between a main tube of a frame structure and the canister surface for the purpose of accommodating the canister. Further such known arts also disclose about the canister purge valve being placed below the canister and mounted on a frame member. In such scenarios, the canister that is housed within the tank inner is supported by a plurality of seat rails, and a bracket of predetermined shape e.g. ‘C’ shape is attached to such plurality of seat rails aiding in mounting the canister.
[00015] Some other known arts specifically disclose the placement of the canister purge valve vertically below the canister. Such location is used mainly to prevent the escape of the fuel vapors out of the canister in fully loaded condition. But in such conditions, keeping the canister purge valve below the canister is usually disadvantageous. This is because when the canister purge valve is placed below the canister, the canister purge valve is typically kept in a closed condition and is activated only upon receiving signal from the ECU. Therefore, when the canister purge valve is in closed condition, the fuel vapors exiting out of the canister often tend to remain in the hose connecting the canister and the canister purge valve that is placed vertically downward. And in certain situations where there is a reduction in ambient temperature, the fuel vapors in the hose gets condensed and are converted to liquid fuel, which remain in the hose.
[00016] Further, when the ECU opens the canister purge valve to purge vapors, due to the vertical downward placement of the canister purge valve from the canister and also since the canister purge valve is subjected to gravity, the condensed liquid fuel remaining in the hose connecting the canister and the canister purge valve enters the canister purge valve and potentially leak into the intake port of the engine which is detrimental to the performance of the engine. Therefore, there is a need of identifying an appropriate location for the canister purge valve in the vicinity of the canister in order to avoid the remaining or condensed liquid fuel in the hose connecting the canister and the canister purge valve, from entering the canister purge valve, when the canister purge valve is opened by means of the ECU.
[00017] Other known arts disclose about the canister purge valve being mounted on a frame structure. Since, the canister purge valve is an integral component of the evaporative emission control sub-system, which is a sub-system of the fuel system of the vehicle, hence during assembly and dis-assembly of the fuel tank assembly, mounting an EVAP component of the fuel tank assembly on the frame structure requires dismantling of that component. Such dismantling becomes cumbersome and time consuming. Moreover, frequent mounting and dismantling of components like canister purge valve can also lead to undesirable loss of reliability of the fuel system of the vehicle.
[00018] Therefore there is a need of eliminating the necessity for mounting the evaporative emission control sub-system including the canister purge valve, roll-over valve in the vicinity of the fuel tank assembly; and also configuring an appropriate compact layout for mounting the one or more regulating sub-system including the canister purge valve in the vicinity of the fuel tank assembly to overcome the above stated problems.
[00019] The present subject matter has been devised in view of the above circumstances as well as solving other problems of the known art.
[00020] The present subject matter relates to a saddle-type vehicle comprising a head pipe, a main tube extending rearwardly from the head pipe, and a fuel tank assembly mounted above the main tube. The fuel tank assembly comprises a fuel tank inner enveloping at least a portion of the main tube, the fuel tank inner further comprising a first region disposed on a left side of the main tube and a second region disposed on a right side of the main tube. An evaporative emission control sub-assembly is accommodated within the fuel tank inner, wherein the evaporative emission control sub-assembly comprises of a canister, and one or more regulating means, and a plurality of hoses connecting the canister to one or more regulating means.
[00021] As per an aspect of the present subject matter, the one or more regulating means comprises a canister purge valve.
[00022] As per another aspect of the present subject matter, the one or more regulating means comprises a roll-over valve.
[00023] As per another aspect of the present subject matter, the evaporative emission control sub-assembly is disposed on one of the first region and said the second region of the fuel tank inner. The at least one region of the first region and the second region of the fuel tank inner accommodates a fuel pump module. The evaporative emission control sub-assembly is accommodated on at least one region of the first region and the second region of the fuel tank inner, other than the region that accommodates the fuel pump module.
[00024] As per another aspect of the present subject matter, the canister is mounted to the fuel tank inner of the vehicle.
[00025] As per another aspect of the present subject matter, the canister purge valve is mounted substantially above the canister from a ground level when seen from a vehicle side view.
[00026] As per another aspect of the present subject matter, the one or more regulating means are mounted to the fuel tank inner.
[00027] As per an embodiment of the present subject matter, the canister purge valve is an electronic purge control valve.
[00028] As per another embodiment of the present subject matter, the canister is mounted between the canister purge valve and the engine of the vehicle.
[00029] As per another embodiment of the present subject matter, the canister is disposed on the second region and the purge valve is disposed on the first region.
[00030] As per another embodiment of the present subject matter, the canister and the purge valve both are disposed in the second region.
[00031] As per another embodiment of the present subject matter, the canister is disposed on the second region and the purge valve is disposed in close proximity to a longitudinal center line of the vehicle.
[00032] As per another embodiment of the present subject matter, the canister and the roll-over valve are disposed in the second region.
[00033] As per another embodiment of the present subject matter, the canister is disposed on the second region and the roll-over valve is disposed in close proximity to a longitudinal center line of the vehicle.
[00034] As per another embodiment of the present subject matter, the canister is disposed substantially inclined downwardly with respect to ground.
[00035] As per an efficacy, the present subject matter provides an easy accessibility of canister purge valve and its electrical coupler.
[00036] As per another embodiment of the present subject matter, a canister purge valve mounting bracket is provided with a mistake proofing feature. As per an efficacy, the mistake proofing feature enables error free assembly of the canister purge valve and also acts as an anti-rotation feature.
[00037] As per an efficacy of the present subject matter, the configuration of the evaporative emission control sub-assembly including the canister purge valve on at least one region of the first region and the second region of the fuel tank inner, other than the region that accommodates the fuel pump module provides improved serviceability of the canister purge valve.
[00038] As per another efficacy of the present subject matter, the layout configuration of the evaporative emission control sub-assembly including the canister purge valve on at least one region of the first region and the second region of the fuel tank inner, other than the region that accommodates the fuel pump module provides improved layout packaging of the canister purge valve.
[00039] As per another efficacy of the present subject matter, the layout design of the evaporative emission control sub-assembly including the canister purge valve on at least one region of the first region and the second region of the fuel tank inner, other than the region that accommodates the fuel pump module eliminates entry of condensed fuel vapors into the purge valve.
[00040] As per another efficacy of the present subject matter, the configuration of the evaporative emission control sub-assembly including the canister purge valve on at least one region of the first region and the second region of the fuel tank inner achieves overall reduction in vehicle weight due to nominal reduction of fuel tank volume. Such nominal reduction in fuel tank volume is achieved for packaging all the components of the evaporative emission control sub-system within the fuel tank assembly.
[00041] As per another efficacy of the present subject matter, the packaging of the evaporative emission control sub-assembly including the canister purge valve on a region other than the region that locates the fuel pump module ensures that the canister purge valve is mounted away from the engine, which prevents the purge valve from getting undesirably heated because of the heat of the engine.
[00042] Exemplary embodiments detailing features regarding the aforesaid and other advantages of the present subject matter will be described hereunder with reference to the accompanying drawings. Various aspects of different embodiments of the present invention will become discernible from the following description set out hereunder. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. It should be noted that the description and figures merely illustrate principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof. Further, it is to be noted that terms “upper”, “down”, “right”, “left”, “front”, “forward”, “rearward”, “downward”, “upward”, “top”, “bottom”, “exterior”, “interior” and like terms are used herein based on the illustrated state or in a standing state of the two wheeled vehicle with a driver riding thereon. Furthermore, arrows wherever provided in the top right corner of figure(s) in the drawings 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, an arrow RH denotes right side, and an arrow LH denotes left side. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
[00043] Fig. 1 illustrates a side view of a vehicle 100 in accordance with an embodiment of the present invention. The vehicle 100 includes a frame assembly 200 (shown in Fig. 2) to support different parts of the vehicle 100. In an upper portion of the frame assembly 200, a handlebar assembly 115 is rotatably integrally connected to the steering shaft (not shown). The handlebar assembly 115 is used to steer the vehicle 100 and is connected to a front wheel 185 through the steering shaft (not shown) and a front fork assembly (not shown). An upper portion of the front wheel 185 is covered by a front fender 190 which prevents mud and water from getting deflected towards the steering system (not shown). Further, the front fork assembly 195 is supported on the front fender 190 by means of a brace fender (not shown).
[00044] In a front portion of the frame assembly 200 (shown in Fig. 2) a fuel tank assembly 120 is arranged immediately behind the handlebar assembly 115 and is disposed over a first power source, for example an engine assembly 180. A seat assembly 125 is placed behind the fuel tank assembly 120. The seat assembly 125 includes a front rider seating portion and a pillion rider seating portion. The pillion rider seating portion is placed on the rear part of the frame assembly 200 (shown in Fig. 2), where the rear part of the frame assembly 200 (shown in Fig. 2) is covered by the tail cover assembly (not labeled).
[00045] For the safety of the rider and in conformance with the traffic rules, a headlamp assembly 105 that includes a headlamp 110 and front indicator lights 140a are provided in the front portion of the vehicle 100. On the rear portion of the two wheeled vehicle 100 a tail lamp (not labeled) and rear indicator light 140b are provided on the rear portion of the tail cover assembly 130. Above the tail cover assembly 130 and behind the seat assembly 125 a pillion handle 135 is provided for the pillion rider to grab.
[00046] Suspension systems are provided for comfortable steering of the two wheeled vehicle 100 on the road. A front suspension assembly 195 serves as rigidity component for the front portion of the vehicle 100 just like the frame assembly 200. The front suspension assembly 195, clamped to the head tube (not labelled) through an upper bracket (not shown) and a lower bracket (not shown), is capable of being moved to the left and right. Further, a rear suspension system 160, which is a hydraulic damped arrangement, is connected to the frame assembly 200 (shown in Fig. 2). The rear suspension system 160 comprises of at least one rear suspension 160 preferably disposed centrally in the longitudinal mid plane of the vehicle 100. However, in a vehicle 100 with two rear suspensions, the same may be disposed on the left side and the right side respectively of the vehicle 100.
[00047] The first power source, for example the engine assembly 180 is mounted to a front lower portion of the frame assembly 200 (shown in Fig. 2) by means of an engine mounting bracket (not shown). The engine assembly 180 is partially covered on the lower side of the engine assembly 180 by an engine cover 175. The engine assembly 180 is equipped with an exhaust system that includes an exhaust pipe (not labeled) connected to the engine assembly 180 and a muffler assembly 155 connected to the exhaust pipe. The muffler assembly 155 extends rearwards along the right side of the rear wheel 150.
[00048] Further, a swing arm (not shown) extending rearwards is swingably connected to a lower rear portion of the vehicle100. The rear wheel 150 is rotatably supported at a rear end of the swing arm (not labeled). Power from the engine assembly 180 is transmitted to the rear wheel 150 through a power drive mechanism, such as a drive chain, so as to drive and rotate the rear wheel 150. A center stand 165 is provided in between the front wheel 185 and the rear wheel 150 for parking the vehicle 100.
[00049] A rear fender 145 for covering an upper side of the rear wheel 150 is mounted to a rear portion of the vehicle 100 to prevent mud and water splashed by the rotating rear wheel 150 from entering the muffler assembly 155, the engine assembly 180 and other parts disposed close by. To enhance the overall aesthetics of the vehicle 100 and to prevent undesired foreign particles from entering parts of the vehicle 100, a plurality of rear covers (not labeled) is attached to a rear portion of the frame assembly 200 (shown in Fig. 2).
[00050] Area below the seat assembly 125 and the fuel tank assembly 120 of the vehicle 100 is covered on both sides by a cover frame assembly 170. The cover frame assembly 170 includes the one or more side covers. XX’ represents vehicle length wise longitudinal direction.
[00051] Fig. 2 illustrates a perspective view of a fuel tank assembly 120 mounted on a frame assembly 200 of a vehicle 100 in accordance with an embodiment of the present invention. The vehicle 100 comprises of a head pipe 200a and a main tube 200b extending rearwardly from the head pipe 200a and a fuel tank assembly 120 mounted above the main tube 200b.
[00052] A downward portion 120a of the fuel tank assembly 120 is mounted on the front portion 200c of the frame assembly 200. The rear portion 120d of the fuel tank assembly 120 is fastened to the frame assembly 200 with help of a plurality of visible fasteners 205, herein called as fastener fuel tank rear mounting 205. The front portion 200c of the fuel tank assembly 120 is disposed just behind a head tube 200a, on a main tube 200b of the frame assembly 200. The upper portion 120b of the fuel tank assembly 120 has an opening which acts as an inlet for inserting the fuel dispenser for filling the fuel tank assembly 120 with fuel. The opening is covered by a cap herein called as a fuel cap assembly 210. The fuel cap assembly 210 is so designed that it can be locked by a locking mechanism to avoid theft of fuel or fuel spillage when the vehicle 100 is parked or even when the vehicle falls on its sides.
[00053] Fig. 3a to Fig. 3b illustrate a perspective view of a fuel tank assembly 120 mounted on a frame assembly 200 of a vehicle 100 in accordance with an embodiment of the present invention. A downward portion 120a (shown in Fig. 2) of the fuel tank assembly 120 is mounted on the front portion 200c of the frame assembly 200. The front portion 200c (shown in Fig. 2) of the fuel tank assembly 120 is disposed just behind a head tube 200a, on a main tube 200b of the frame assembly 200. The engine assembly 180 is mounted below the fuel tank assembly 120. A throttle body 325 and an air filter 330 are positioned in the vicinity of the engine assembly 180 and below the fuel tank assembly 120. The throttle body 325 is the part of the air intake system of the vehicle 100 that controls the amount of air flowing into the engine assembly 180, in response to driver accelerator or pedal input .
[00054] The air filter 330 filters out all the unwanted particles in the air before it enters the engine assembly 180, allowing only clean and pure air inside for better combustion, which results in better efficiency and smooth power delivery to the vehicle 100. Fig. 3b shows a local cutout window on the fuel tank showing an evaporative emission control sub-assembly 400 placed inside the fuel tank assembly 120.
[00055] The evaporative emission control sub-assembly 400 comprises of a canister 305, and one or more regulating means 300 (shown in Fig 3c), and a plurality of hoses 345 (shown in Fig 3c) connecting the canister 305 to the one or more regulating means 300. The regulating means 300 include a canister purge valve 300 or roll-over valve. As per an embodiment the canister purge valve 300 is an electronic purge control valve.
[00056] Fig. 3c to Fig. 3h illustrates a fuel tank assembly 120 of a vehicle 100 in accordance with an embodiment of the present invention. The inner portion of the fuel tank assembly 120 herein called as a fuel tank inner 335 includes a fuel pump assembly 340, and the evaporative emission control sub-assembly 400. The fuel tank inner 335 envelopes at least a portion of the main tube 200b (as seen by dotted line In Fig. 3b). The fuel tank inner 335 further comprises of a first region A disposed on a left side of the main tube 200b and a second region B disposed on a right side of the main tube 200b when seen from a seated rider perspective. The one or more region, i.e., the first region A and the second region B are defined by a longitudinal line PP’ passing through the lateral center of the fuel tank inner 335, that also passes through the center of the main tube 200b. With respect to the longitudinal line PP’, the first region A is disposed on a left side of the longitudinal line PP’ and the second region B is disposed on a right side of the longitudinal line PP’. The evaporative emission control sub-assembly 400 includes a canister 305, a canister purge valve 300, a plurality of hoses 345, and a check valve 355.
[00057] As per the present embodiment, the canister 305, and the check valve 355 of the evaporative emission control sub-assembly 400 are disposed in the first region A; and the canister purge valve 300 and the plurality of hoses 345 connecting the canister purge valve 300 and the canister 305 are disposed on the second region B. A fuel pump module 340 is disposed in the second region B in the vicinity of 300. A coupler 350 is disposed along the longitudinal line PP’, such that it is in vicinity of both the canister 305 and the canister purge valve 300.
[00058] Usually an air inlet to air cleaner is provided with additional cover to protect the water and dust entry into air filter of the vehicle and it is mounted on a frame bracket with mounting screws and provisions made to hold the electrical wiring connectors in position. Normally in motorcycles and scooters a fuel filter is assembled inside the fuel tank assembly 120 which is further integrated with fuel pump module 340, to enable timely screening of the dirt and dust particles present in the fuel. But in this case filtration efficiency level is low since outside fuel line there is no filtration up to induction system, so some amount of dirt particles have high chances of entering the engine assembly. Therefore external fuel filter is sometimes provided in a pocket present on the inner tank present on the backside of fuel pump module 340 and a bracket is provided in the tank for mounting the fuel filter using plastic straps.
[00059] As per another embodiment, the orientation of fuel pump module 340 is changed from 0 degree to 8 degree with respect to bottom of fuel tank to achieve required clearance for float due to design changes in fuel tank. Normally in motorcycles, where fuel tanks are completely exposed, the fuel pump module is mounted below the fuel tank. Due to gradient dead volume, and to maintain adequate gap between float and fuel tank inner, the fuel pump module 340 is rotated at 8 degrees. This rotation of the fuel pump module 340 reduces the required minimum indication volume.
[00060] Therefore, as per the present embodiment the canister purge valve 300 is integrated with the fuel tank assembly 120. Such layout configuration provides ease in assembly and disassembly of the fuel tank assembly 120 and evaporative emission sub system 400 components together. Therefore, the assembly duration is considerably reduced.
[00061] Typically, the volume of the fuel on the side of the fuel pump module 340 is higher than the other side. Thus, configuring the evaporative emission control sub-system 400 on the other side opposite to that of the fuel pump module 340 side ensures that the overall center of gravity of the vehicle 100 is maintained in close proximity to the center line PP’ which is desirable for good vehicle handling performance.
[00062] Fig. 3d illustrates a front view of the fuel tank assembly 120 of a vehicle 100 in accordance with an embodiment of the present invention. The canister purge valve 300 is positioned laterally opposite to the canister 305 across a longitudinal mid line PP’. A longitudinal mid line PP’ is present substantially in the mid plane of the fuel tank inner 335 of the fuel tank assembly 120. The canister is positioned in the first region A and the canister purge valve 300 is positioned in the second region B. In a metal fuel tank assembly 120 the canister purge valve 300 is positioned above the throttle body 325 (shown in Fig 3b) and above and laterally opposite to the canister 305 and at least partially behind the cylinder head (not shown) and in front of the air filter 330 (shown in Fig 3b). The plurality of hoses 345 are connected to the canister purge valve 300.
[00063] Fig. 3e illustrates a perspective view of the mounting of the canister purge valve 300 in the metal fuel tank assembly 120 of a vehicle 100 in accordance with an embodiment of the present invention.
[00064] As per the embodiment the canister purge valve 300 is fixed on the metal fuel tank inner 335. A metal bracket, herein called as a canister purge valve mounting bracket 310 is welded to the fuel tank inner 335 of the fuel tank assembly 120 and the canister purge valve 300 is fastened with the canister purge valve mounting bracket 310 by means of one or more fastener 315. Therefore by mounting the purge valve to the fuel tank inner surface, the need for separately mounting the canister purge valve 300 to the frame assembly 200 is eliminated.
[00065] Additionally, the mounting of the canister 305 to the fuel tank inner surface 335, eliminates the need for separately supporting the canister 305 to the frame assembly 200 with help of additional set of mounting structures (not shown).
[00066] Fig. 3f to Fig. 3g illustrates perspective bottom side view and side view of the fuel tank assembly 120 as per another embodiment of the present subject matter. The canister 305 is mounted on the first region A whereas the canister purge valve 300 and the fuel pump module 340 are mounted in the second region B of the fuel tank assembly 120. Fig. 3g shows the positioning of the canister purge valve 300 and the canister 305 on the frame assembly 200 of the vehicle 100 as per an embodiment of the present subject matter.
[00067] Fig. 4a to Fig. 4f illustrates number of bottom, front, side and perspective views of the fuel tank assembly 120 as per an alternate embodiment of the present subject matter. As per the present embodiment the canister purge valve 300 is positioned substantially above and in front of the canister 305. In the fuel tank assembly 120 the canister purge valve 300 is positioned above to the cylinder head (not shown); whereas the canister 305 and the throttle body 325 is placed in the front of the air filter 330. Fig. 4f shows the positioning of the canister purge valve 300 and the canister 305 on the frame assembly 200 of the vehicle 100 as per an embodiment of the present subject matter.
[00068] As per an alternate embodiment the canister purge valve 300 is mounted substantially above the canister 305 from a ground level when seen from the vehicle 100 side view.
[00069] Fig. 5a to Fig. 5f illustrates number of side, bottom and perspective views of the fuel tank assembly 120 as per another alternate embodiment of the present subject matter. As per the present embodiment the canister purge valve 300 is positioned at the rear side of the canister 305 and substantially along the mid line PP’ of the vehicle 100. In the fuel tank assembly 120 the canister purge valve 300 is positioned behind the throttle body 325 and substantially in the rear of the canister and mid line PP’ of the vehicle 100. The canister 305 is positioned in the second region B and at least a portion of the canister purge valve 300 is positioned on the first region A. Fig. 5f shows the positioning of the canister purge valve 300 and the canister 305 on the frame assembly 200 of the vehicle 100 as per an embodiment of the present subject matter.
[00070] As per an alternate embodiment, at least a portion of the evaporative emission control sub-assembly 400 is disposed on one of the first region A and the second region B of the fuel tank inner 335.
[00071] As per an alternate embodiment the at least one region of the first region A and the second region B of the fuel tank inner 335 accommodates a fuel pump module 340.
[00072] As per an alternate embodiment the canister 305 is mounted between the canister purge valve 300 and the engine assembly 180.
[00073] As per an alternate embodiment the canister 305 is disposed in the second region B and the canister purge valve 300 is disposed along a longitudinal center line PP’ of the vehicle 100.
[00074] As per an alternate embodiment the canister 305 is disposed on the second region B and the roll-over valve is disposed along a longitudinal center line PP’ of the vehicle 100.
[00075] As per an alternate embodiment the saddle-type vehicle 100 the canister 305 is disposed substantially vertically inclined (as shown in Fig 4e) to the longitudinal center line PP’ of the vehicle 100.
[00076] As per an alternate embodiment of the saddle-type vehicle 100, the canister purge valve mounting bracket 310 is provided with a mistake proofing feature in the form of two mounting means wherein one means is of a different geometrical profile as compared to the other means thereby eliminating error of incorrect assembly of the canister purge valve.
[00077] 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.

LIST OF REFERENCE NUMERALS

100: Vehicle
105: Headlamp assembly
110: Headlamp
115: Handlebar assembly
120: Fuel tank assembly
120a: Downward portion
120b: Upper portion
200c: Front portion
120d: Rear portion
125: Seat assembly
130: Tail cover assembly
135: Pillion handle
140a: Front indicator lights
140b: Rear indicator lights
145: Rear fender
150: Rear wheel
155: Muffler assembly
160: Rear suspension system
165: Centre stand
170: Cover frame assembly
175: Engine cover
180: Engine assembly
185: Front wheel
190: Front fender
195: Front suspension
200: Frame assembly
200a: Head tube
200b: Main tube
205: Fastener fuel tank rear mounting
210: Fuel cap assembly
300: Canister purge valve
305: Canister
310: Canister purge valve mounting bracket
315: Fastener
320: Engine cylinder head
325: Throttle body
330: Air filter
335: Fuel tank inner
340: Fuel pump module
345: Hose
350: Coupler
355: Check valve
400: Evaporative emission control sub-assembly
A: first region
B: second region