Speaking of traction (Traction),many people may think of first is drive the car forward of the engine power that heavy,slow start compared to light trucks,fast cars traction start small.It is not so?Imagine a tire slip on slippery ice and can not move the car,even though the maximum step on the throttle,the engine speed reaches the maximum red,half-step of the towing vehicle can not be the case.Push the car forward of the reason can be seen directly from the engine power is not,but from the tire and the ground contact produces friction.So often we have to consider friction as traction.
We know that ABS is used in automobile tire slip when slowing down to recover the original Traction / Friction brake control system.In contrast,in the start-up and acceleration caused by the tire slipping motion will lag phenomenon.If we change the red light green light,the often hear wheel spin when the car starts sliding friction with the ground,howling..This situation is because when the driver slammed on the accelerator at the start,suddenly the engine torque output is too large,causing the tire to lose Traction / friction,resulting in idle slip phenomenon.The most primitive way is to loose a little throttle directly from the driver,should resume the original low-speed start some Traction.However,car drivers always expect their own will driving,the throttle should be accelerated.For this reason,engineers have developed on the basis of ABS Traction control.
Traction control system,the current multi-use electronic forms of control,using the same sensor used in ABS,front and rear tire angular velocity by detecting the difference to determine whether a tire rotation faster than other tires,and skid in the idle state.When the speed difference reaches a certain number,the system automatically determine and correct.Traction Control systems and applications based on different cars have different forms.The main approach has increased the pressure to the brake system to prevent slippage of the tire and wheel spin spin
Some Traction control and ABS brake system,although using the same hardware,but their function is completely the opposite,ABS brakes acting on the car skidding tires from locking when the purpose is to increase the angular velocity of the tire rotation; and Traction control system is the role of acceleration in the tire rotation time transfer case skid,the purpose is to reduce the idling speed of rotation the tire to maintain maximum contact with the ground.