TECHNICAL FIELD
[0001] The present subject matter relates to a two or three wheeled vehicle. More particularly, the present subject matter relates to a drive assembly for a pure electrically driven two-or three wheeled vehicle.
BACKGROUND
[0002] Conventionally, an electric motor used for driving an electric two-
wheeled vehicle is mounted directly at or on a real wheel axle and, at the same time, supports a rear wheel hub so that part of the electric motor rotates together with the wheel as an external rotor. However, the hub-type electric motors have the disadvantage that a vehicle frame of the electric two-wheeled vehicle reacts less comfortably, since the use of the hub-type electric motor increases the unsprung mass of a vehicle rear suspension. Furthermore, the hub-type electric motor is directly exposed to impact loads and the possibly high temperatures of the brakes, which reduce their useful life and their reliability.
[0003] In addition, an existing electric two-wheeled vehicle having the hub-
type electric motor mounted to the rear wheel of the vehicle comprises of one or more hall sensors adapted for the vehicle wheel speed sensing and are embedded in the motor itself. Typically, in case of the sensor failure, the hub-type electric motor needs to be dismounted for repair or replacement of the one or more sensors. However, the repair and the replacement of the sensors becomes cumbersome as it involves the disassembling mechanism of the rear wheel and the motor and thus complicates the maintenance and servicing procedures. With current paradigm shift from vehicles with IC engines to EV & HEV type vehicles, there is a transient need for vehicle manufacturers to have products designed to have platforms flexible to change from IC engine type power train to HEV or EV etc. without any substantial change in product design as well as minimum impact on assembly difficulty. There is also a problem of high change over time between different models being produced on same production set-up as well as increase in variety of parts leading
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to ail consequential problem like more number of exclusive parts between variants, high lead time of change over, high cost, operators not trained etc. Typical vehicles with IC engines are designed, tuned & optimised to deliver the best performance & durability to the customers. One of the most important aspects of performance of the vehicle is the CG of the vehicle which for a given IC engine type vehicle is predetermined. When such a platform vehicle is changed to other power train systems like HEV or EV, the impact on the weight distribution change is substantial. Similarly, when the vehicle & assembly line needs to be changed to manufacture an EV vehicle, there exists a challenge to ensure the CG of the vehicle is substantially at the pre-determined location as in the vehicle with IC engine configuration. Any drastic change in the mass distribution or CG can lead to change in the load transfer of the vehicle during events like braking, in-plane & out of plane maneuvers. There exists a problem to be able to package the mass distribution of a different power train system to achieve the location of CG of the vehicle to be within a predetermined distance from the CG of the parent IC engine vehicle. Thus there is a need to have a design of a vehicle including distribution of its constituent parts to enable smooth change over in production while still retaining substantially same dynamic characteristics of the vehicle in terms of braking effectiveness, ride comfort, handling etc. The CG of the EV vehicle shall be within a spheroid of the CG of the IC engine wherein the radius of the spheroid is equal to distance between the CG of the IC engine type vehicle to the swing-arm axis of the vehicle. Any distance beyond this drastically disturbs the dynamic performance of the vehicle when changed to EV.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The detailed description is described with reference to the
accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[0005] Fig.l is a side view of a pure electrically driven two-wheeled vehicle
as per one embodiment of the present invention.

[0006] Fig.2 is a perspective view of the pure electrically-driven two-wheeled
vehicle illustrating an electric motor and at least one supporting structure disposed on at least a portion of the vehicle as per one embodiment of the present invention.
[0007] Fig.3 is a perspective view of a frame of said pure electrically driven
two-wheeled vehicle of Fig.l, illustrating said electric motor being removably mounted on a vehicle swing arm as per one embodiment of the present invention.
DETAILED DESCRIPTION
[0008] A known electric two-wheeled vehicle comprises a hub-type electric
motor as a drive source. The hub-type electric motor lies directly at or on the real wheel axle without additional joints, the entire electric motor is part of the unsprung mass of the rear wheel. Thus, the electric motor mounted to the hub of the rear wheel of the electric two-wheeled vehicle has various disadvantageous consequences, for example, the electric motor is directly subjected to all vibrations and forces. Further, another disadvantage of the hub-type electric motor is that the components located directly in proximity to the rear wheel are subjected to environmental influences & exposure to dust, mud, water, stone hitting etc. Furthermore, since the brakes are also located in direct proximity to the hub-type electric motor, there are thermal problems due to the mutual heating of the motor and the brake. Additionally, because of the availability of the small installation space for the electric motor in the wheel hub, the cooling process of the motor and one or more sensors embedded therein is problematic. Furthermore, since said one or more sensors are embedded in the hub-type electric motor, therefore any repair or replacement of the sensors involves cumbersome and time-consuming process of disassembling the rear wheel and the motor.
[0009] In order to overcome the above mentioned disadvantages associated
with the conventional hub-type electric motor in the existing electrically driven two-wheeled vehicle, the present invention provides an improved pure-electrically driven two-wheeled vehicle which includes a modified mounting mechanism for the electric motor on the vehicle such that an output torque of the electric motor is transmitted to the rear wheel of the vehicle though a transmission member being

disposed between said electric motor and the rear wheel. Further, as per one embodiment of the present invention, one or more energy storage devices in the form of rechargeable batteries and being configured for powering the electric motor is housed in at least one supporting structure. In one embodiment, said at least one supporting structure is arranged above the electric motor such that said at least one supporting structure and a vehicle drive assembly including the electric motor are individually spaced from each other.
[00010] As per one embodiment of the present invention, the two-wheeled vehicle comprises a frame extending along a vehicle longitudinal axis, a swing arm journaled to the frame and adapted to support the rear wheel. In one embodiment, said swing arm includes at least one mounting boss fixedly attached to at least a portion thereof. In one embodiment, the two-wheeled vehicle further comprises a drive assembly including the electric motor configured to deliver power to the rear wheel. As per embodiment, said electric motor comprises of one or more mounting portions integrally formed to at least a portion thereof and are configured for removably mounting said electric motor on at least a portion of said swing arm through said at least one mounting boss. The electric motor comprises a rotatably output shaft and a drive member at a distal end of the output shaft. As per one embodiment, a driven member is connected to said rear wheel. In one embodiment, said drive member and said driven member are pulleys. In another embodiment, said drive member and said driven member are sprockets. As one embodiment, said driven member is aligned on a rear wheel axle of the vehicle rear wheel. In one embodiment, the drive assembly for the vehicle comprises a transmission member for power transmission from the electric motor to said rear wheel. In one embodiment, said transmission member is disposed between the drive member of the electric motor and the driven member of the rear wheel. In one embodiment, said transmission member is a chain. In another embodiment, said transmission member is a drive belt. As per one embodiment, said at least one supporting structure is disposed in a space defined between said electric motor mounted on the swing arm and a utility box dismountably supported on a rear portion of the vehicle frame. Particularly, in one embodiment, said at least one supporting structure is

longitudinally and vertically offset from said swing arm and said electric motor, respectively. In one embodiment of the present invention, said at least one supporting structure configured to hold one or more energy storage devices therein is removably secured to a rear portion of said frame through at least one holder member. In one embodiment, said at least one holder member is fixedly attached to said rear portion of said frame through welding. In one embodiment, at least one controller unit configured to manage an operation of said one or more energy storage devices, is disposed forwardly of said at least one supporting structure through at least one mounting bracket. In one embodiment, a storage member for storing a charging unit is disposed on a front portion of the vehicle frame. In one embodiment, the charging unit is configured to enable charging of said one or more energy storage devices. To enable having a flexible architecture of the vehicle so as to be able to use common structural parts like frame, chassis, swing-arm, the power train & major electrical components are optimally distributed at one or more locations e.g. power train motor or auxiliary motor or primary batter or auxiliary battery or ECU or ISG disposed on the swing-arm or below floor board, or below rider seat or below pillion seat or ahead of head tube or behind leg shield. The distribution of the masses is done such that the masses so packaged constitute their weight within a predetermined range of the engine weight W. The optimum range is within 5% to 40% of the weight W of the baseline gasoline power train. Such a specific distribution ratio enables the CG of the vehicle to be retained within a spheroid of a predetermined radius where the radius is equal to the distance between the CG of the baseline vehicle & the swing-arm axis of the baseline vehicle. Various embodiments lying within the above range enable achieving & retaining the vehicles dynamic characteristics to be substantially same as the baseline vehicle.
[00011] The present invention relates to an improved pure electrically driven two-wheeled vehicle which includes a frame extending from a vehicle front portion to a rear portion, a vehicle rear suspension system including the swing arm connecting the rear wheel to the frame and a shock absorber to dampen movement between the swing arm and the frame during operation. As per one embodiment, the electric motor is removably mounted on at least a portion of the swing arm such that
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the transmission member disposed between the drive member of the electric motor and the driven member of the rear wheel is used to deliver power from an electric motor to the rear wheel.
[00012] In one embodiment, the present invention relates to an improved electric two-wheeled in which the electric motor can be removably mounted on the vehicle such that the unsprung mass of the vehicle rear suspension is lowered substantially. In addition, it is desirable to provide an improved mounting mechanism for the electric motor which can provide good initial acceleration to the vehicle, thereby consistently providing higher efficiency. Further, it is desirable to provide an improved electric two-wheeled vehicle which comprises a modified mounting mechanism of the electric motor on at least a portion of the vehicle without involving additional number of parts, increased cost of installation and in addition provides the consumer with an economical solution in terms of fuel efficiency as well as reduction in emissions.
[0001] Referring to one embodiment of the present invention, said at least one
supporting structure adapted for housing said one or more energy storage devices is disposed in a line in the front-rear direction of the vehicle. Particularly, as per one embodiment of the present invention, said one or more energy devices comprises of at least one primary energy storage device being disposed below a floorboard portion of the vehicle and at least one auxiliary energy storage device being disposed in a region defined between the electric motor and the utility box of the vehicle such that said at least one supporting structure configured to house said one or more energy storage devices is individually spaced from the drive assembly including the electric motor. In another embodiment, a region defined below said floor board portion is adapted as a storage space.
[0002] The present invention provides an improved electric two-wheeled
vehicle comprising a modified drive assembly which includes the electric motor mounted on the swing arm and said transmission member disposed between the electric motor and the rear wheel. In one embodiment, said transmission member is

being adapted for power transmission from the electric motor to the rear wheel, thus providing an improved initial acceleration.
[0003] Referring to one embodiment, the present invention provides an
improved electric two-wheeled vehicle comprising of said electric motor configured to fit within the space and weight limitations of an engine mounting space of the existing engine powered two-wheeled vehicle through said at least one mounting boss required for mounting an engine on the existing two-wheeled vehicle and hence does not involve any structural changes in the existing two-wheeled vehicle layout.
[0004] Further, as per one embodiment of the present invention, with the
mounting of said electric motor on said swing arm of the vehicle instead of mounting on the rear wheel hub of the vehicle, the unsprung mass of the vehicle rear suspension is substantially reduced. Particularly, as per one embodiment of the present invention, with the mounting of the electric motor on said at least a portion of the swing arm, the unsprung mass of the vehicle rear suspension as in existing electric two-wheeled vehicle gets distributed evenly between said swing arm and the vehicle rear suspension, thereby providing improved riding experience for occupants of the vehicle
[0005] The present invention provides a modified mounting of the electric
motor on the pure-electrically driven two-wheeled vehicle such that said one or more sensors adapted for detecting the vehicle wheel speed is embedded in said electric motor. Thus, in case of sensor failure, the assembling and disassembling of the electric motor for the repair and replacement of said one or more sensors is simple and convenient in less time with less effort.
[0006] As per one embodiment of the present invention, the pure electrically
driven two-wheeled vehicle includes the electric motor being removably mounted on the swing arm and said one or more energy storage devices in the form of the rechargeable batteries or fuel cells being housed in said at least one supporting structure. In one embodiment, said at least one supporting structure including at least one auxiliary energy storage device is disposed in the space defined between the utility box and the electric motor. Particularly, as per one embodiment, said at least
8

one supporting structure is removably mounted to at least a portion of a pair of left and right rear frames of the vehicle frame through said at least one holder member. Hence, as per one embodiment of the present invention, it is advantageous to have a short length wiring harness for establishing an electrical connection between said at least one auxiliary energy storage device being housed in said at least one supporting structure and the electric motor being mounted on the swing arm. In another embodiment of the present invention, one or more wiring harnesses adapted for establishing electrical connection between said electric motor and said one or more energy devices, said at least one controller unit and said one or more energy devices are substantially of equal length.
[0007] Various other features and advantages of the invention are described in
detail below with reference to the accompanying drawings. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. The drawing in which an element first appears is indicated by the leftmost digit(s) in the corresponding reference number. With reference to the accompanying drawings, wherein the same reference numerals will be used to identify the same or similar elements throughout the several views. It should be noted that the drawings should be viewed in the direction of orientation of the reference numerals.
[0008] It is to be noted that in the ensuing description, the present invention is
usable in a saddle type vehicle exemplified in the form of a pure electrically driven two wheeled scooter type vehicle or three wheeled vehicle including trike type vehicle.
[0009] Further "front" and "rear", and "left" and "right" referred to in the ensuing description of the illustrated embodiment refer to front and rear, and left and right directions as seen in a state of being seated on a seat of the two-wheeled vehicle. Furthermore, a longitudinal axis refers to a front to rear axis relative to the vehicle, while a lateral axis refers to a side to side, or left to right axis relative to the vehicle. 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.

[00010] With reference to FIG.l, a description is made of an electric two-wheeled vehicle (hereinafter "vehicle") as per one embodiment of the present invention. In one embodiment, the vehicle (1) illustrated, has a low framework structure body frame (200) (shown in Fig.2 and Fig.3) having a floor board portion (8). The vehicle (1) further includes a plurality of body panels for covering the frame (200) and is mounted thereto. The plurality of body panels includes a front panel (13), a leg shield (9), an under-seat cover (7), and a left and a right-side panel (16). Further, a seat assembly (6) is disposed above said under-seat cover (7). A utility box (17) (shown in Fig.2) is disposed below the seat assembly (6). A pillion handle (5) is disposed behind said seat assembly (6). A front fender (14) is disposed above a front wheel (2) and between left and right suspensions (21) supporting the front wheel (2). A rear fender (4) is configured for covering at least a portion of a rear wheel (3). One or more suspension(s)/shock absorbers (18) are provided in a rear portion (R) of said vehicle (1) for comfortable ride. Further, said vehicle (1) comprises of plurality of electrical and electronic components including a headlight (12), a taillight (19), a transistor controlled ignition (TCI) unit (not shown), a starter motor (not shown) and the like. A touch screen LCD unit (not shown) is provided on a handle bar (10) to display various operating modes, power flow pattern and warning signals. A pair of left and right rear view mirrors (11) are mounted on the right and left sides of the handle bar (10). In one embodiment, said vehicle (1) is also provided with hazard lamps (not shown).
[00011] Further in Fig.l, an electric motor (100) is arranged behind said floor board portion (8). Particularly, said electric motor (100) is removably disposed on a swing arm (IS) through at least one mounting boss (102), (103) (shown in Fig.3) being fixedly attached therein. The swing arm (10) is attached to at least a portion of the vehicle frame (100) by means of a toggle link (not shown). The other end of the swing arm (10) holds the rear wheel (3). The rear wheel (3) and the swing arm (15) are connected to the frame (200) by a pair of shock absorbers (18) provided on either side of the vehicle (1). In one embodiment of the present invention, the vehicle (1) is configured to be propelled by the electric motor (100).

[00012] Fig.2 is a perspective view of the vehicle (1) illustrating the mounting of said electric motor (100) and at least one supporting structure (300) on the vehicle (1) as per one embodiment of the present invention. In one embodiment, said electric motor (100) is removably mounted on said at least a portion of the swing arm (15). Further, as per one embodiment, said at least one supporting structure (300) is disposed in the space defined between said electric motor (100) and the utility box (17). In one embodiment, said at least one supporting structure (300) is removably secured to said rear portion (R') of said frame (200) through at least one holder member (301). Referring to one embodiment, said at least one supporting structure (300) is offset from said swing arm (15) in said vehicle longitudinal axis (AA'). In one embodiment, said at least one supporting structure (300) is offset from said electric motor (100) in the vehicle vertical axis (BB')- As per one embodiment, said vehicle vertical axis (BB') is perpendicular to said vehicle longitudinal axis (AA')-
[00013] Further in Fig.2, as per one embodiment, said vehicle (1) comprises of
the frame (200) extending along the vehicle longitudinal axis (AA'). As per one
embodiment, the swing arm (15) is joumaled to the frame (200) and adapted to
support the rear wheel (3). In one embodiment, the electric motor (100) is
configured to deliver power to the rear wheel (3). Referring to one embodiment, the
seat assembly (6) is disposed above said under-seat cover (7), and is mounted to the
rear portion (R') of the frame (200). Further, as per one embodiment, said at least
one supporting structure (300) is disposed in the space defined between said electric
motor (100) mounted on the swing arm (15) and the utility box (17) being disposed
below said seat assembly (6). Particularly, said at least one supporting structure
(300) is arranged above the electric motor (100) such that said at least one
supporting structure (300) and the vehicle drive assembly (20) including the electric
motor (100) are individually spaced from each other. In one embodiment, said at
least one supporting structure (300) is removably secured to the rear portion (R')
of said frame (200) through said at least one holder member (301). As per one
embodiment, said at least one holder member (301) is fixedly attached to the rear
portion (R5) of said frame (200) through welding. As per one embodiment, said at
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least one controller unit (304) configured to manage an operation of said at least one electrical component (302), (303), (306) (shown in Fig.3) including said one or more energy storage devices is placed forward relative to said at least one supporting structure (300). In one embodiment said at least one controller unit (304) is adapted for supplying electric power to the electric motor (100).
[00014] Fig. 3 is a perspective view of the vehicle frame (200) of Fig.l as per one embodiment of the present invention. As per one embodiment, the swing arm is (15) joumaled to the frame (200) through the toggle link (not shown) and is adapted to support the rear wheel (3). In one embodiment, the swing arm (15) includes said at least one mounting boss (102), (103) fixedly attached to said at least a portion thereof. As per one embodiment, the electric motor (100) is configured to deliver power to the rear wheel (3). In one embodiment, the electric motor (100) comprises of said one or more mounting portions (100a), (100b) integrally formed to at least a portion thereof. The one or more mounting portions (100a), (100b) are configured for removably mounting said electric motor (100) on said at least a portion of said swing arm (10) through said at least one mounting boss (102), (103). Referring to one embodiment, said electric motor (100) comprises of said rotatably output shaft and the drive member (104) at a distal end of the output shaft. Further, in one embodiment, the driven member (307) is connected to said rear wheel (3). In one embodiment of the present invention, said drive member (104) and the driven member (307) are pulleys. In another embodiment, said drive member (104) and the driven member (307) are sprockets. As per one embodiment, said drive member (307) is aligned on the rear wheel axle (3a) of the vehicle rear wheel (3). In one embodiment, the vehicle drive assembly (20) includes said transmission member (101) for power transmission from the electric motor (100) to said rear wheel (3). In one embodiment, said transmission member (101) is disposed between the drive member (104) of the electric motor (100) and the driven member (307) of the rear wheel (3). As per one embodiment, said transmission member (101) is a chain. As per another embodiment, said transmission member (101) is a drive belt.

[00015] Further, in one embodiment, the vehicle (1) comprises the low framework structure body frame (200). In one embodiment, the vehicle frame (200) includes a head tube (203), a main tube (204) extending obliquely downwardly from a lower portion of the head tube (203), a pair of left and right floor tubes (201L), (201R) joined to a lower part of the main tube (204) and both extending from the lower part of the main tube (204) towards the rear of the vehicle (1), a cross tube (205) joined to both rear-end parts of the floor tubes (201L), (201R) and extending in a lateral direction and the pair of left and right rear frames (202L), (202R) extending upward and to the rear of the vehicle (1). In one embodiment, front-end parts of the rear frames (202L), (202R) being joined to respective left and right ends parts of the cross-tube (205). As per one embodiment of the present invention, said at least one supporting structure (300) is disposed in the space defined between said electric motor (100) and the utility box (17). Particularly, in one embodiment, said at least one supporting structure (300) is removably secured to said at least a portion of said pair of left and right rear frames (202L), (202R) in the rear portion (R') of said frame (200) through said at least one holder member (301). As per one embodiment said at least one supporting structure (300) is configured to hold said at least one electrical component (302), (303), (306) including said one or more energy storage devices therein. In one embodiment, said at least one supporting structure (300) comprises at least one air guide structure (300a) formed in at least a portion thereof for providing cooling effect to said one or more energy storage devices (302), (303), (306) housed therein.
[00016] Further in Fig.3, as per one embodiment, said at least one controller
unit (304) configured to manage an operation of said at least one electrical
component (302), (303), (306) including said one or more energy storage devices
is disposed forwardly of said at least one supporting structure (300) through said at
least one mounting bracket (304a). Further, said at least one mounting bracket
(304a) is fixedly attached to at least a portion of said pair of right and left rear
frames (202L), (202R). As per one embodiment, said at least one electrical
component (302), (303), (306) including said one or more energy storage devices
are rechargeable batteries. In one embodiment said one or more energy devices
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(302), (303), (306) includes said at least one primary energy storage device (306) and said at least one auxiliary energy storage device (302), (303). In one embodiment, said at least one primary energy storage device (306) is detachably mounted to said pair of left and right floor tubes frames (201L), (201R) such that said at least one primary energy storage device (306) is located below said floor board portion (8) of the vehicle (1) and said at least one auxiliary energy storage device (302), (303) is disposed below said utility box (17) of the vehicle (1). Referring to one embodiment of the present invention, the charging unit (not shown) configured to enable charging of said at least one electric component (302), (303), (306) including one or more energy storage devices is housed in the storage member (305). In one embodiment, the storage member (305) is disposed on the front portion (F') of the vehicle frame (200).
[00017] It is advantageous to mount said electric motor on said swing arm of the pure electrically driven two-wheeled vehicle such that the power transmission from said electric motor to the vehicle rear wheel takes place through said transmission member being disposed between said drive member of the electric motor and the driven member of the rear wheel, thereby facilitating an improved initial acceleration for the pure electrically driven two-wheeled vehicle. Furthermore, as per one embodiment of the present invention, it is advantageous to provide an improved pure electrically driven two-wheeled vehicle which provides a simple, cost-effective and less-time consuming mounting mechanism for said electric motor being removably mounted on the swing arm of the vehicle Further, in one embodiment of the present invention, the mounting of said electric motor on the swing arm affords numerous advantages, such as substantially reduced unsprung weight for the vehicle rear suspension, thus providing improved handling and riding experience for the riders of the vehicle.

1. A two or three-wheeled vehicle (1), said vehicle (1) comprising:
a frame (200) extending along a vehicle longitudinal axis (AA);
a swing arm (15) joumaled to the frame (200) and adapted to support a rear
wheel (3), said swing arm (15) includes at least one mounting boss (102),
(103) fixedly attached to at least a portion thereof; said at least one
mounting boss (102), (103) is adapted to mount an internal combustion
engine on at least a portion of said swing arm (15); and
a drive assembly (20) including an electric motor (100) configured to
deliver power to the rear wheel (3);
wherein said electric motor (100) comprises of one or more mounting
portions (100a), (100b) integrally formed to at least a portion thereof; and
wherein said one or more mounting portions (100a), (100b) is configured
for removably mounting said electric motor (100) on said at least a portion
of said swing arm (15) through said at least one mounting boss (102), (103)
adapted to mount said internal combustion engine.
2. The vehicle (1) as claimed in claim 1, wherein said engine and said electric motor (100) comprises a centre of gravity (CG) position being substantially within a spheroid of predetermined radius such that the centre of the spheroid is the centre of gravity (CG) of the vehicle (1) with said engine.
3. The vehicle (1) as claimed in claim 2, wherein the radius of the spheroid is equal to distance between the centre of gravity (CG) of the engine and the swing-arm axis of the engine.
4. The vehicle (1) as claimed in claim 1, wherein the drive assembly (20) includes a hub motor.
5. The vehicle (1) as claimed in claiml, wherein the drive assembly (20) includes a combination of smaller capacity hub motor and an auxiliary

motor which is mounted on swing-arm through suitable transmission system.
6. The vehicle (1) as claimed in claim 1, wherein the drive assembly (20) is HEV.
7. The vehicle (1) as claimed in claim 1, wherein the vehicle (1) has at least one electrical component (302), (303), (306) disposed on at least a portion under rider seat, under pillion seat, under floor board, behind leg shield area, in front of head pipe and the swing arm.
8. The vehicle (1) as claimed in claim 1, wherein the vehicle (1) has at least one electrical component (302), (303), (306) disposed above floor board.
9. The vehicle (1) as claimed in claim 7 or 8, wherein said at least one of the electrical component (302), (303), (306) is in weight range of 5% to 40% of the weight of the drive assembly (20).
10. The two-wheeled vehicle (1) as claimed in claim 1, wherein said electric motor (100) comprises a rotatable output shaft and a drive member (104) at a distal end of the output shaft.
11. The vehicle (1) as claimed in claim 1, wherein said rear wheel (3) is connected to a driven member (307).
12. The vehicle (1) as claimed in claim 1, wherein the drive assembly (20) includes a transmission member (101) adapted for power transmission from the electric motor (100) to said rear wheel (3).
13. The vehicle (1) as claimed in claim 12, wherein said transmission member
(101) is disposed between the drive member (104) of the electric motor
(100) and the driven member (307) of the rear wheel (3).
14. The vehicle (1) as claimed in claim 1, wherein said at least one electrical
component (302), (303), (306) including one or more energy storage
devices is housed in at least one supporting structure (300).
15. The vehicle (1) as claimed in claim 14, wherein said at least one supporting
structure (300) is disposed in a space defined between said electric motor
(100) mounted on the swing arm (15) and a utility box (17) dismountably
supported on a rear portion (R') of the vehicle frame (200).
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16. The vehicle (1) as claimed in claim 14, wherein said at least one supporting
structure (300) is vertically above said electric motor (100) being mounted
on said swing arm (15) in said vehicle longitudinal axis (AA').
17. The vehicle (1) as claimed in claim 14, wherein said at least one supporting structure (300) is vertically above said electric motor (100) in a vehicle vertical axis (BB').
18. The vehicle (1) as claimed in claim 14, wherein said one or more energy storage devices (302), (303), (306) receives a plurality of electrical signals from a charging unit.