It uses a network of sensors installed on the vehicle to monitor wheel speed, steering-wheel position, yaw rate, and lateral acceleration. Subaru VDC (Vehicle Dynamics Control) is a form of electronic stability control. The system determines the difference between intended and actual direction and electronically issues orders to the car's systems to mitigate the problem. Typically, the intended path and actual travel path are the same, but if there are wheel slippage and a loss of traction, they can differ. It compares the driver's intended direction as determined by the steering wheel angle to the vehicle's actual direction of travel. Instead, it provides inputs that enable the driver to continue to steer the car in the direction they want it to go.ĭuring normal driving, a VDC system continuously monitors steering and vehicle direction. If a vehicle begins to understeer - in other words, if it is not responding to steering wheel input to turn and instead pushes forward in a straight line - VDC will apply the brakes on the outer front wheel forcing the car to turn. Then, to ward off more significant traction loss, they apply countermeasures that the driver cannot.įor instance, the VDC system might apply the brakes to individual wheels to counteract slipping. Electronic stability control systems use computerized technology to detect wheel slippage before it is evident to the driver.
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