Pic. 8.5. Elements of the dynamics control system (ESP) Mercedes–Benz: 1– sensors of frequency of rotation of back wheels; 2 - control unit; 3 - front wheel speed sensors; 4 – piston block with pressure sensor; 5 - supercharger pump; 6 - hydraulic block; 7 - steering wheel position sensor; 8 - transverse acceleration sensor; 9 - sensor of angular displacement relative to the vertical axis
An electronic stabilization program based on ABS/ASR systems reduces the risk of skidding. When cornering at high speeds or during sharp leveling maneuvers, the ESP system recognizes the danger of a vehicle skidding (pic. 8.5).
To do this, he receives information from the sensors about the angle of rotation of the steered wheels and, based on the speed of the car, determines the speed of its displacement relative to the vertical axis. Unstable vehicle positions are instantly detected. By braking individual wheels and controlling the engine torque, the car is kept on a given trajectory. For example, if there is a danger of the front wheels drifting outward in a turn, the rear wheel is braked within the turning radius and the vehicle's position is stabilized. If the rear of the vehicle is in danger of skidding in a fast corner, the system brakes the front wheel passing the outer cornering radius.
An illuminated indicator in the instrument cluster informs about the operation of the ESP system. In this case, to reduce the risk of skidding, the driver must adapt the driving style to the road conditions.