ABS on the other hand acts in such a way so as to stop the wheel but not completely locking & stopping the wheel. During a braking action the rider/s moves forward, thus moving the vehicle centre of gravity towards the front end of the vehicle. Thus stopping of the vehicle with the help of front wheel is more effective than stopping of the rear wheel/s.
Considering the vehicle is running at 90 Degrees angle with the road while brake is applied, if the front wheel is locked while the rear wheel is still rotating, there is a chance of vehicle getting overturned frontways due to shift of centre of gravity (towards front) and high inertia of motion and less load on the back side of the vehicle compared to the forward forces acting on the vehicle.
Considering the same above conditions (i.e. brake is applied & front brake got locked while vehicle in motion) when the vehicle is not running at 90 degrees angle with the road i.e. the vehicle frame is having an angle less than 90 degrees with the road (in either left or right side), then a radial force will act upon the rear wheel where the radious will be the length between the centre of gravity of the vehicle at that time to the point of contact of the rear wheel with the road. This radial force will try to move the rear wheel left or right – sideways (depending upon the < 90 degrees angle the vehicle frame made with the road surface during that time – either left side of the vehicle or the right side of the vehicle). Thus the rider will find (if at all it is possible for him / her to find it) that the rear wheels tend to move sideways more compared to forward movement.
During this time the front wheel also moves the opposite direction i.e. if the rear wheel moves left wards then the front wheel will move rightways, but the movement of the front wheel will be so little compared to the rear wheel that the rider will only feel about the rear wheel & not the front wheel. All this movement will happen in motion & keeping the center of such movement at the centre of gravity – which point will also moves due to the movement of the riders body movement due to inertia. Such complex movements of the moving mass (vehicle + rider) will eventually skid the vehicle sideways & for a two wheeler the rider & the vehicle will fall causing injuries & damage due to such accident.
With the above description we can clearly understand that why ABS system is necessary for any vehicle particularly a two wheeler. Simply because to avoid locking of disc braking system as they are very efficient in braking & quickly acts in stopping the wheel.
Considering the vehicle is running at 90 Degrees angle with the road while brake is applied, if the front wheel is locked while the rear wheel is still rotating, there is a chance of vehicle getting overturned frontways due to shift of centre of gravity (towards front) and high inertia of motion and less load on the back side of the vehicle compared to the forward forces acting on the vehicle.
Considering the same above conditions (i.e. brake is applied & front brake got locked while vehicle in motion) when the vehicle is not running at 90 degrees angle with the road i.e. the vehicle frame is having an angle less than 90 degrees with the road (in either left or right side), then a radial force will act upon the rear wheel where the radious will be the length between the centre of gravity of the vehicle at that time to the point of contact of the rear wheel with the road. This radial force will try to move the rear wheel left or right – sideways (depending upon the < 90 degrees angle the vehicle frame made with the road surface during that time – either left side of the vehicle or the right side of the vehicle). Thus the rider will find (if at all it is possible for him / her to find it) that the rear wheels tend to move sideways more compared to forward movement.
During this time the front wheel also moves the opposite direction i.e. if the rear wheel moves left wards then the front wheel will move rightways, but the movement of the front wheel will be so little compared to the rear wheel that the rider will only feel about the rear wheel & not the front wheel. All this movement will happen in motion & keeping the center of such movement at the centre of gravity – which point will also moves due to the movement of the riders body movement due to inertia. Such complex movements of the moving mass (vehicle + rider) will eventually skid the vehicle sideways & for a two wheeler the rider & the vehicle will fall causing injuries & damage due to such accident.
With the above description we can clearly understand that why ABS system is necessary for any vehicle particularly a two wheeler. Simply because to avoid locking of disc braking system as they are very efficient in braking & quickly acts in stopping the wheel.
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