Description:TECHNICAL FIELD
[0001] The present subject matter relates generally to a two-wheeled vehicle. More particularly but not exclusively, the present invention relates to a fuel tank assembly for a motorcycle.
BACKGROUND
[0002] Generally, in a two-wheeled vehicle, a fuel tank assembly is provided to store fuel there within. The fuel tank assembly is usually disposed at a rear end of the vehicle or at the front end of the vehicle. In a scooter type of motorcycle, the fuel tank assembly is disposed below the seat assembly and at the rear end of the vehicle. Whereas, in a motorcycle, the fuel tank assembly is disposed along a main frame of a vehicle frame assembly. The fuel tank assembly is used to store fuel of required capacity and facilitate smooth and uninterrupted fuel flow to an engine assembly whenever required. In motorcycles, fuel tank is made of sheet metal and consists of fuel tank outer body and fuel tank inner body. The outer body and the inner body are joined by seam welding process.
SUMMARY OF THE IVNENTION
[0003] In the present invention, the primary fuel float sensor is disposed in the fuel tank at a rear portion of the fuel tank along a central axis of the fuel tank.
[0004] The second fuel float sensor is disposed in the lowermost portion of the fuel tank after the fuel cork assembly for covering more region to detect the fuel level.
[0005] The primary fuel float sensor and the secondary fuel float sensor continuously moves along an angular motion and provides resistance values to the speedometer of the vehicle which displays the fuel level of the fuel tank to a user.
[0006] The primary fuel float sensor is configured to cover roughly after 2 litres of fuel tank volume, and the secondary fuel float sensor covers roughly the lowermost portion of the fuel tank having a volume range from 0 to 2 liters.
[0007] As per an embodiment, the present invention provides a fuel tank assembly (150) for a vehicle (200), said fuel tank assembly (150) comprising a fuel tank inner (150i), a fuel tank outer, said fuel tank inner (150i) and said fuel tank outer forming storage volume for fuel inside said fuel tank assembly (150), a primary fuel float sensor (201), a secondary fuel float sensor (202).
[0008] As per an embodiment, the primary fuel float sensor (201) being disposed rearwardly to a central axis (LM) of said fuel tank assembly (150), wherein said secondary float sensor (202) disposed at a lowermost portion of the fuel tank assembly (150).
[0009] As per an embodiment, wherein said primary fuel float sensor (201) being disposed rearwardly to said central axis (LM) of said fuel tank assembly (150), said central axis (LM) being an imaginary axis passing along a width direction of said fuel tank assembly (150) and passing centrally along said fuel tank assembly (150).
[00010] As per an embodiment, wherein a fuel cork sub-assembly (203) being disposed at a proximity to said central axis (LM) on said fuel tank inner (150i), wherein said secondary fuel float sensor (202) being disposed rearwardly to said fuel cork sub-assembly (203).
[00011] As per an embodiment, wherein a speedometer (204) of said vehicle (200) being capable of displaying one or more fuel level values being detected from said primary fuel float sensor (201) and said secondary fuel float sensor (202).
[00012] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) move continuously in an angular motion inside said fuel tank assembly (150).
[00013] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) each being independently associated with a primary fuel sender unit and a secondary fuel sender unit.
[00014] As per an embodiment, wherein said fuel tank assembly (150) comprising a dead space (DS) being defined at said lower most portion of said fuel tank inner (150i), said dead space (DS) being defined below a second imaginary axis (DS).

BRIEF DESCRIPTION OF THE DRAWINGS
[00015] The detailed description is described with reference to the accompanying figures. The same numbers are used throughout the drawings to reference features and components.
[00016] Figure 1 illustrates a left-side view of a motorcycle.
[00017] Figure 2 illustrates a plan view of a fuel tank assembly as assembled on to a vehicle frame of the vehicle.
[00018] Figure 3 illustrates a left side view of the fuel tank assembly under assembled condition in the vehicle.
DETAILED DESCRIPTION
[00019] Generally, in a two-wheeled vehicle, a storage structure is used as a utility member either to store various articles of the user or to store power source for the vehicle. The storage structure can also be used to store fuel for the vehicle. The storage structure is usually disposed at a rear end of the vehicle or at the front end of the vehicle. In a scooter type of motorcycle, the storage structure is disposed below the seat assembly and at the rear end of the vehicle. Whereas, in a motorcycle, the storage structure is disposed along a main frame of a vehicle frame assembly. The storage structure is used to store fuel of required capacity and facilitate smooth and uninterrupted fuel flow to an engine assembly whenever required.
[00020] In conventional vehicles, a fuel float sensor is disposed in a front portion of the fuel tank. However, a single fuel float sensor is unable to determine the correct fuel level as its inability to rotate angularly to the lowermost portion of the fuel tank as explained below in the prior art. Hence, the fuel level is not indicated properly to the user.
[00021] To overcome this problem, the known art proposes two fuel sensors being disposed in the fuel tank. The first fuel float sensor is disposed in a front portion of the fuel tank and the second fuel float sensor is disposed in the lowermost portion of the fuel tank before the fuel cock. However, in this configuration, the two fuel sensors are connected using a mechanical arm to link and provide accurate fuel value when the vehicle moves over an irregular terrain or bumps.
[00022] The above configuration increases the part count and makes the overall design complex.
[00023] In the present invention, the primary fuel float sensor is disposed in the fuel tank at a rear portion of the fuel tank along a central axis of the fuel tank.
[00024] The second fuel float sensor is disposed in the lowermost portion of the fuel tank after the fuel cork assembly for covering more region to detect the fuel level.
[00025] The primary fuel float sensor and the secondary fuel float sensor continuously moves along an angular motion and provides resistance values to the speedometer of the vehicle which displays the fuel level of the fuel tank to a user.
[00026] The primary fuel float sensor is configured to cover roughly after 2 litres of fuel tank volume, and the secondary fuel float sensor covers roughly the lowermost portion of the fuel tank having a volume range from 0 to 2 liters.
[00027] As per an embodiment, the present invention provides a fuel tank assembly (150) for a vehicle (200), said fuel tank assembly (150) comprising a fuel tank inner (150i), a fuel tank outer, said fuel tank inner (150i) and said fuel tank outer forming storage volume for fuel inside said fuel tank assembly (150), a primary fuel float sensor (201), a secondary fuel float sensor (202).
[00028] As per an embodiment, the primary fuel float sensor (201) being disposed rearwardly to a central axis (LM) of said fuel tank assembly (150), wherein said secondary float sensor (202) disposed at a lowermost portion of the fuel tank assembly (150).
[00029] As per an embodiment, wherein said primary fuel float sensor (201) being disposed rearwardly to said central axis (LM) of said fuel tank assembly (150), said central axis (LM) being an imaginary axis passing along a width direction of said fuel tank assembly (150) and passing centrally along said fuel tank assembly (150).
[00030] As per an embodiment, wherein a fuel cork sub-assembly (203) being disposed at a proximity to said central axis (LM) on said fuel tank inner (150i), wherein said secondary fuel float sensor (202) being disposed rearwardly to said fuel cork sub-assembly (203).
[00031] As per an embodiment, wherein a speedometer (204) of said vehicle (200) being capable of displaying one or more fuel level values being detected from said primary fuel float sensor (201) and said secondary fuel float sensor (202).
[00032] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) move continuously in an angular motion inside said fuel tank assembly (150).
[00033] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) each being independently associated with a primary fuel sender unit and a secondary fuel sender unit.
[00034] As per an embodiment, wherein said fuel tank assembly (150) comprising a dead space (DS) being defined at said lower most portion of said fuel tank inner (150i), said dead space (DS) being defined below a second imaginary axis (DS).
[00035] As per an embodiment, wherein said secondary fuel float sensor (202) being disposed in said dead space (DS).
[00036] Figure 1 illustrates a left side view of an exemplary two-wheeled vehicle 200, in accordance with an embodiment of the present subject matter. Arrows provided in the top right corner of each figure 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, and an arrow Dw denotes downward direction. The vehicle 200 includes a frame assembly 201 that extends rearward from a head tube 201A. The frame assembly 201 extends along in a longitudinal direction F-R of the vehicle 200. The frame assembly 201 includes a mainframe comprising a main tube 201B extending rearward from a rear portion of the head tube 201A and a down tube 201C that extends rearwardly downward from the head tube 201A. The frame assembly 201 may further comprise a sub-frame formed by a pair of rear tubes that extend obliquely rearward from the main frame. An engine assembly 100 is mounted to the main frame of the frame assembly 201.
[00037] The engine assembly 100 acts as the power unit of the vehicle 200, wherein the power unit may also include a traction/electrical motor (not shown). The engine assembly 100 is coupled to an exhaust assembly 110 that scavenges exhaust gases there through. A front portion of a swing arm 115 is swingably connected to the frame assembly 201 and a rear portion of the swing arm 115 rotatably supports a rear wheel 120. The rear wheel 120 is functionally coupled to the engine assembly 100 through a transmission system/member 125. In a preferred embodiment, the transmission system 125 includes a chain drive coupled to an output of manual gear transmission. However, the transmission system 125 may include an automatic transmission or continuously variable transmission. Further, the swing arm 115 is coupled to the frame assembly 201 through one or more rear suspension(s) (not shown). In the present embodiment, a mono-shock rear suspension connects the swing arm 115 to the frame assembly 201. Similarly, a pair of front forks 130 supports a front wheel 135 and is steerably supported by the head tube 201A. A handlebar assembly 140 is connected to an upper portion of the pair of front forks 130. Further, a front fender 145 covers at least a portion of the front wheel 135 and the front fender assembly 145 is mounted to the front forks 130.
[00038] A fuel tank 150 is mounted to the main tube 201B of the frame assembly 201 and disposed rearwardly of the handlebar assembly 140. A seat assembly including a rider seat 155 and a pillion seat 160 is disposed rearwardly of the fuel tank assembly 150 and is supported by the rear tubes. A pair of rider foot pegs 165 is disposed on either sides and is mounted to the frame assembly 201 of the vehicle that supports rider foot. A rear fender 170 is disposed upwardly of the rear wheel 120 covering at least a portion of the rear wheel 120.
[00039] Further, the engine assembly 100 is functionally coupled to an air-fuel supply system (not shown) that supplies air and fuel to the engine assembly 100. The torque/power output of the engine assembly 100 is transferred to a drive sprocket (not shown). A chain drive 125 is coupled to the drive sprocket. A sprocket cover encloses the drive sprocket and at least a portion of the chain drive 125.
[00040] Furthermore, vehicle 200 includes various electrical and electronic systems including a starter motor (not shown), a headlamp 175, a vehicle control unit, and a tail lamp 180.
[00041] Figure 2 illustrates a plan view of a fuel tank assembly as assembled on to a vehicle frame of the vehicle. As per an embodiment, the present invention provides a fuel tank assembly (150) for a vehicle (200), said fuel tank assembly (150) comprising a fuel tank inner (150i), a fuel tank outer, said fuel tank inner (150i) and said fuel tank outer forming storage volume for fuel inside said fuel tank assembly (150), a primary fuel float sensor (201), a secondary fuel float sensor (202).
[00042] As per an embodiment, the primary fuel float sensor (201) being disposed rearwardly a central axis (LM) of said fuel tank assembly (150), wherein said secondary float sensor (202) disposed at a lowermost portion of the fuel tank assembly (150).
[00043] As per an embodiment, wherein said primary fuel float sensor (201) being disposed rearwardly to said central axis (LM) of said fuel tank assembly (150), said central axis (LM) being an imaginary axis passing along a width direction of said fuel tank assembly (150) and passing centrally along said fuel tank assembly (150).
[00044] Figure 3 illustrates a left side view of the fuel tank assembly under assembled condition in the vehicle. As per an embodiment, the primary fuel float sensor (201) being disposed rearwardly to a central axis (LM) of said fuel tank assembly (150), wherein said secondary float sensor (202) disposed at a lowermost portion of the fuel tank assembly (150).
[00045] As per an embodiment, wherein said primary fuel float sensor (201) being disposed rearwardly to said central axis (LM) of said fuel tank assembly (150), said central axis (LM) being an imaginary axis passing along a width direction of said fuel tank assembly (150) and passing centrally along said fuel tank assembly (150).
[00046] As per an embodiment, wherein a fuel cork sub-assembly (203) being disposed at a proximity to said central axis (LM) on said fuel tank inner (150i), wherein said secondary fuel float sensor (202) being disposed rearwardly to said fuel cork sub-assembly (203).
[00047] As per an embodiment, wherein a speedometer (204) of said vehicle (200) being capable of displaying one or more fuel level values being detected from said primary fuel float sensor (201) and said secondary fuel float sensor (202).
[00048] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) move continuously in an angular motion inside said fuel tank assembly (150).
[00049] As per an embodiment, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) each being independently associated with a primary fuel sender unit and a secondary fuel sender unit.
[00050] As per an embodiment, wherein said fuel tank assembly (150) comprising a dead space (DS) being defined at said lower most portion of said fuel tank inner (150i), said dead space (DS) being defined below a second imaginary axis (DS). The second imaginary axis (DS) being an horizontal imaginary line passing through the dead space, above which the fuel inside the fuel tank is mostly utilized.
[00051] As per an embodiment, wherein said secondary fuel float sensor (202) being disposed in said dead space (DS).
[00052] According to the present invention, the existing problems in the art of not being able to utilize the fuel available in the dead space due to non-reachability and non-availability for the consumption by the vehicle is solved by providing a combination of the primary fuel float sensor (201) and the secondary fuel float sensor (202) at the lowermost portion, being defined by dead space (DS) in the vehicle.
[00053] As per the present invention, the fuel efficiency is improved by being able to sense the lower most availability of the fuel in the fuel tank.
[00054] Although the subject matter has been described with reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the subject matter, will become apparent to persons skilled in the art upon reference to the description of the subject matter. It is therefore contemplated that such modifications can be made without departing from the spirit or scope of the present subject matter as defined.

, Claims:I/We claim:
1. A fuel tank assembly (150) for a vehicle (200), said fuel tank assembly (150) comprising:
a fuel tank inner (150i);
a fuel tank outer,
said fuel tank inner (150i) and said fuel tank outer forming storage volume for fuel inside said fuel tank assembly (150);
a primary fuel float sensor (201);
a secondary fuel float sensor (202);
wherein said primary fuel float sensor (201) being disposed rearwardly to a central axis (LM) of said fuel tank assembly (150);
wherein said secondary float sensor (202) disposed at a lowermost portion of the fuel tank assembly (150).
2. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein, said central axis (LM) being an imaginary axis passing along a width direction of said fuel tank assembly (150) and passing centrally along said fuel tank assembly (150).
3. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein a fuel cork sub-assembly (203) being disposed at a proximity to said central axis (LM) on said fuel tank inner (150i), wherein said secondary fuel float sensor (202) being disposed rearwardly to said fuel cork sub-assembly (203).
4. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein a speedometer (204) of said vehicle (200) being capable of displaying one or more fuel level values being detected from said primary fuel float sensor (201) and said secondary fuel float sensor (202).
5. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) move continuously in an angular motion inside said fuel tank assembly (150).
6. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein said primary fuel float sensor (201) and said secondary fuel float sensor (202) each being independently associated with a primary fuel sender unit and a secondary fuel sender unit of said fuel tank assembly (150).
7. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein said fuel tank assembly (150) comprising a dead space (DS) being defined at said lower most portion of said fuel tank inner (150i), said dead space (DS) being defined below a second imaginary axis (DS).
8. The fuel tank assembly (150) for a vehicle (200) as claimed in claim 1, wherein said secondary fuel float sensor (202) being disposed in said dead space (DS).