DESC:One embodiment of the present invention comprising of tilting three wheeled vehicle 100 as shown in the Figure1. The tilting three wheeled vehicle is comprised of a tubular chassis 1, with front portion comprising of a handle bar 10 connected to the front steering wheel 9 through the steering rod 11, steering link 2 and wheel mount front 5. The steering rod 11 rotates about it access and actuates the wheel steering through steering link 2 connected to the wheel mount font 5. The tilt block 12, is pivoted to the chassis 1 and secured in position through the tilt lock pin 13 and suspension system 6, which intern is connected to the upper tilt arm 3.
The upper and the lower swing arm 3, are secured in position to the front lower portion of the chassis. The upper swing arm 3 is hinged to the top pivot and the lower arm 3 is hinged to the bottom pivot forming a multi-bar link mechanism with wheel mount front 5. The swing arms 3,3 are secured to the wheel mount front with the help of ball joints 8 allowing the swing arms to have two degree of freedom. The Motor drive assembly 7 is secured to the wheel mount front 5 and connected to the steering wheel 9 through gearbox 8.
The vehicle 100 as shown in the figure 2 refers to one of the many tilt positions as specified in the current embodiment.
In one another embodiment as illustrated in the figure 3, the tilt block 12 locked in its position using a tilt lock pin 13, which intern constraints the degree of freedom of the main chassis 1, swing arm 3, suspension 6 and the wheel front mount 5, thus locking the tilt action of the vehicle 100

In some embodiment as illustrated in the figure 4, the absence of tilt lock pin 13 allows the tilt block 12 to have a rotary degree of freedom along its axis, thus enabling the main chassis 1, swing arm 3, suspension 6 and wheel front mount 5 to have the required degree of freedom to allow tilt action of the vehicle 100.
In the illustrated embodiment of the front wheel drive assembly 110, the assembly comprises of the motor 7, gear box drive 8 and front steering wheel 9 forming the front independent drive wheel system.
The rear portion of the chassis 1 as illustrated in Figure 7 comprises of Rear wheel 16 which is driven by a combination of gear and chain drive mechanism comprising of motor assembly 14, gearbox 20, Chain 19, drive sprocket 22 and driven sprocket 23. The rear portion of the chassis 1 further comprises of a battery box 15 and traction control unit secured inside the compartment 30.
Figure 8 illustrates an embodiment of multiple rider 120 position A2, A3 for the vehicle 100 for a given terrain 130 to increase the vehicle stability and provide better rideability on a given terrain.
For example, consider the case where the terrain is off-road and uneven, In this case to improve the rideability the rider can shift his position from A2 to A3 by moving his leg from front foot mount to rear foot mount, thus lifting the body position to A3, which gives better stability and rideability to the rider
Further to illustrate an embodiment of one of the traction control algorithm the Figure 9 is one such control logic for vehicle 100 to be driven on a sandy terrain.
In view of the wide verity of embodiments to which the principles of the invention can be applied, it should be appreciated that the detailed embodiments are illustrative only and should not be taken as limiting the scope of the invention and should be determined only by a fair reading of the claims
,CLAIMS:We Claim,
1. A tilting three wheeled electric vehicle comprising of ;
a tubular chassis frame with a forward portion comprising of
I. a first tilting linkage assembly comprising of a top swing arm secured to the main chassis frame at the first top mounting pivot and the second top mounting pivot, a bottom swing arm secured to chassis frame at the first bottom pivot mount and the second bottom pivot mount.
II. a first front wheel is secured to said frame through first tilting linkage assembly; the said front wheel assembly forms the first wheel tilt Plane
III. a second tilting linkage assembly comprising of a top swing arm secured to the chassis frame at the first top mounting pivot and the second top mounting pivot, a bottom swing arm secured to chassis frame at the first bottom pivot mount and the second bottom pivot mount.
IV. a second front wheel is secured to said frame through second tilting linkage assembly; the said front wheel assembly forms the second wheel tilt plane. The said first and second wheel planes are aligned parallel to each other and to the plane of said main chassis frame during the tilt action
V. a first motor drive unit with plurality of gears is secured to the first front wheel forming the first independent front wheel drive
VI. a second motor drive unit with plurality of gears is secured to the second front wheel forming the second independent front wheel drive
VII. a first foot mount positioned towards the front chassis portion

2. A tilting three wheeled electric vehicle comprising of ;
a tubular chassis frame with a rear portion comprising of
I. rider seat, rear wheel and a third motor drive unit with plurality of gear mechanism; the said third motor drive unit conveys the power to the said rear wheel through chain drive or belt drive or direct drive
II. a second foot mount positioned towards the rear chassis portion
III. a battery box with battery swapping mechanism

3. A tilting three wheeled vehicle of claim 1, wherein the said vehicle is electrically powered and said vehicle has electric motor drive on all the three wheels to offer variable torque on demand
4. A tilting three wheeled vehicle of claim 1, wherein the said frame has a front tilt block pivoted to the front section of the frame, such that the frame plane is perpendicular to the tilt block pivot axis and said frame plane may tilt to left or right side along the pivot axis
5. The tilting three wheeled vehicle of claim 4, wherein the said tilt block pivot can be safety locked in position by a simple stopper lock pin to constrain the said frame in its plane and prevent it from tilting to left or right side along the pivot axis
6. A tilting three wheeled vehicle of claim 5, further includes a steering mechanism comprising of
I. A steering rod secured in position on the said frame using bearings. The said steering rod can be rotated over the bearing axis to provide the steering angle
II. A steering manipulator arm attached to the said steering rod and the wheel assembly through a link mechanism

7. A tilting three wheeled vehicle of claim 6, further includes a handle bar mounted onto the steering rod and connected to the first and second front wheel through steering manipulator arm which translate the rotary motion of the steering rod into linear motion of the link mechanism connecting the steering rod and the wheels
8. A tilting three wheeled vehicle of claim 7, further includes a direct reduction gear motor drive system for both left and right front wheels and a chain or belt driven motor drive system for the rear wheel
9. A tilting three wheeled vehicle of claim 8, further includes a microcontroller based electronic control unit; the said control unit receives signals from plurality of sensors connected to the electric motor drives and computes the optimum torque, speed and direction output for each of the three-wheel electric motor drives for a given terrain
10. A method of controlling the three wheeled vehicle comprising of first front wheel drive, second front wheel drive and a third rear wheel drive by the electronic control unit, the said method comprising of;
Receiving throttle input by actuation of the throttle by the rider, computing the torque requirement by measuring the peak current drawn by each of the individual motor drive in first 100 milliseconds, measure difference in individual wheel speed to compute the traction using traction control algorithms,
Automatically send commands to individual wheel drive to increase or decrease speed and intern apply different torque to individual wheels to achieve the vehicle movement for a given terrains