Vehicle Skid Control Paper Presentation & Seminar

Vehicle skid can be defined as the loss of traction between a vehicle’s tyres and the road surface due to the forces acting on the vehicle. Most skids are caused by driver error, although only about 15% of accidents are the direct result of a vehicle skidding. Skids occurring in other accidents are usually the result of last minute action, by the driver, when faced with a crisis ahead rather than actually causing an accident. Skids can occur both in the dry and wet as well as icy conditions, however, the chances of losing control and having an accident increases by 50% in the wet. The most common type of skid we will be confronted with is when the rear end of the car slides out, causing an oversteer or when the front of the car plows toward the outside of a turn without following the curve of the turn causing an understeer. Usually, oversteer occurs as a result of going into a corner too fast or incorrectly hitting a slick area, causing the rear wheels to oversteer. A third skid called the four wheel skid can also occur, where all the four wheels lock up and the vehicle slides in the direction where the forward momentum is carrying it, with no directional control.

To counter these skids and to prevent accidents from happening, Vehicle Skid Control (VSC) is incorporated in the vehicle. Vehicle Skid Control (VSC) takes the safety aspects of the driver and the vehicle to the next level. It comes under the category of “Passive Technology”, which helps you to avoid a crash. Vehicle Skid Control (VSC) senses the onset of traction loss and helps the driver stay on track. This is achieved via the system's ability to reduce engine power and to control the brake actuator. VSC helps the driver maintain vehicle traction under demanding conditions by detecting and helping to correct the wheel spin. VSC uses a variety of sensor input to determine if the car is losing traction, then applies the brakes to individual wheels to help correct for discrepancies. The system will also back off the throttle to reduce power. VSC integrates traction control to limit rear wheelspin on slippery surfaces. The VSC system electronically monitors speed and direction, and compares the vehicle's direction of travel with the driver's steering, acceleration and braking input. VSC can help the driver compensate for loss of lateral traction, which can cause skids and loss of vehicle control



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