When the vehicle passes through the low-friction road, the direction and speed of the vehicle cannot be controlled by the driver because of the tire slipping. At this time, ESP can help the driver to regain control of the vehicle by braking the wheels so that they do not slip, thus ensuring driving safety.
When the steering is insufficient, ESP will control the braking of one rear wheel; if the steering is insufficient to the right, it will control the braking of the right rear wheel; if the steering is insufficient to the left, it will control the braking of the left rear wheel. Similarly, ESP will control one front wheel brake when oversteer, brake the left front wheel when oversteer to the right, and brake the right front wheel when oversteer to the left. ESP will also control the corresponding wheel brakes to keep the vehicle stable when skidding on the snowy road.
Extended data
Function of ESP
ESP includes electronic brake distribution system (EBD, electrical).
Brake distribution), anti-lock braking system (ABS), tracking control system (TCS,
Traction control system) and vehicle dynamic control system (VDC).
EBD: Adjust the distribution of braking force to prevent the rear wheel of the vehicle from locking first. Generally, only the module hardware fails;
ABS: In order to prevent wheel locking, the vehicle slip rate is calculated and controlled near the peak value of adhesion coefficient, which belongs to passive safety control;
Traction control system. When the working condition is usually a vehicle with low adhesion to the road, the deep throttle will drive the wheels to slip, and TCS will request the engine to reduce the torque, and at the same time apply a little brake to make the vehicle start smoothly. At present, vehicles can start smoothly with full throttle on ice and snow roads.
VDC: Vehicle dynamic stability control system, which mainly corrects the understeer and oversteer of a single wheel through active pressurization. TCS and VDC belong to active pressurization, that is, pressure can be applied to the brake pipeline without applying brake pedal force.
Baidu Encyclopedia-Body Electronic Stability System