ABSTRACT
Stability control can be defined as the real time method of controlling the lateral trajectory of a vehicle to arrest the growth of skid. Different stability control methods used in today’s fine automobiles helps to reduce accidents. This system assists the driver by correcting oversteer and understeer conditions in panic reactions. Stability control can be achieved effectively, by means of two methods. First is Antilock Braking System(ABS) which prevents wheel lockup & subsequent skidding by controlling brake fluid pressure at individual wheels. The ABS controller pulses the brakes to the wheels which is about to stop rotating at about 15 times a second.
Second is Traction Control System which reduces wheel spin during acceleration by lowering engine torque, which is achieved by retarding ignition timing, throttle control, fuel cut-off. Different sensors are used to measure different parameters of a vehicle such as steering angle, yaw rate, wheel speed and lateral acceleration. This information is conveyed to Electronic Control Unit which detects events such as skidding and sends signals to actuators. There are two types of traction control system those that control engine torque and those that control both engine torque and brakes.
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