Friday, December 12, 2014

Traction Control in Motorcycles



Traction control will only make riding safer

            Traction Control is an important feature on performance motorcycles, especially those with a huge power output. Traction Control Systems help the rider to accelerate, brake and steer in an efficient way making riding safer. Most riders don't have complete control over their bikes on wet, slippery or surfaces covered with sand. Traction control can aid the rider to stay on the road by maintaining enough grip under these circumstances.

            Traction refers to the grip of a tyre on the road. Traction control was designed to prevent loss of traction of the vehicle on the road. Without a certain amount of traction, it is difficult to accelerate, brake or steer the motorcycle. Motorcycles have got a very less area of contact to the road surface through tyres. The amount of traction utilized by our tyres depends on the application of throttle, road surface which can be slippery, wet, uneven or sandy as well as the condition of the tyres. The tyres can be inadequately inflated, old or new, or unevenly worn out. Traction control helps to maintain required traction regardless of all these factors.


How does it work?


            The ABS sensor continuously monitors the wheel speed. As the engine is connected to the rear wheel through the chain, the rear wheel speed is an important factor to determine loss of traction. Loss of traction of the rear wheel creates a difference between the front and rear wheel speed which is detected by the ABS sensors. The sensors relate this data to the bikes ECU that controls various actuators connected to the engine to ensure an ideal performance. ECU has the ability to control and monitor the throttle position, power delivered and engine speed along with several other parameters.

            Depending on the available traction, real time wheel speed sensor and engine speed data, the ECU determines the difference in the front and rear wheel speed and triggers a  response to match the rear wheel speed with the front wheel speed and denies the bike from skidding or slipping. The action taken by the ECU to prevent the loss of traction can be in the form of delay in the ignition timing, create an intentional misfire by skipping fuel injection in a cylinder or adjust the throttle position. All these actions taken by the ECU result in modulation of the engine torque until traction is regained at the maximum possible efficiency.

1. Delaying the ignition timing has an immediate but slow response.

2. Creating an intentional misfire by skipping fuel injection in a cylinder has a faster and better response as a cylinder drop creates an immediate decrease in the engine torque.

3. Adjusting the throttle is slower but has the ability to provide 100% torque drop.

            Anti-lock Braking System (ABS) is one of the most common forms of traction control which stops the wheels from locking if the situation demands braking hard and in turn stops the bike from skidding.