The stabilization of the car to the possible physical limits is provided by the electronic stability control system of the car ESP. This electronic program is not intended to compensate for possible weaknesses in the chassis, but has been created for the sole purpose of further enhancing the active safety of the vehicle. Thanks to this program, the car remains manageable even in critical situations.
ESP constantly monitors the course of the car, this system starts to work in the event of critical situations in terms of driving dynamics, when the car starts to get out of control.
The ESP system works on the basis of the ABS electronic anti-lock braking system, in addition, it includes the ASR traction control system. While ABS and ASR act in the longitudinal direction, ESP affects the driving dynamics in the transverse direction. This possibility appeared due to the so-called yaw rate sensors. Yaw experts call the angular movement of the car relative to its vertical axis.
If the car starts to steer in a curve, ESP brakes the wheel on the outside of the curve for a fraction of a second before the rear of the car begins to skid out. When the car is understeered, for example, when the front wheels hit a slippery section of the road, ESP takes effect on the rear axle. As a result, the rear wheel located on the inside of the curve is braked and the car returns to a neutral course.
Electronic stabilization does not interfere with the driver. Although ESP constantly monitors the driving behavior of the vehicle, in the range of stable dynamics it operates in the background, that is, unnoticed by the driver.
By the way, the ESP system can be turned off by pressing a button. However, this feature is provided primarily to turn off the ASR in certain situations. When the system is turned off, the yellow light on the speedometer lights up.
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