What is the function of the body stability system?

ESP of Pacific Auto Network, also known as body stability system, is a more effective safety system based on ABS anti-lock braking system. Its main function is that ESP can play a role when the car suddenly turns sharply, turns around, flicks its tail and other emergencies. The steering sensor and wheel speed sensor of the car can feed back the abnormal situation to ESP, thus issuing instructions to interfere with the power output. With the help of anti-lock braking system, the unstable state of the car is corrected by adjusting the wheel brakes, so as to protect the safety of passengers.

ESP system includes ABS (Anti-lock Brake System) and ASR (Driving acceleration slip regulation), which are the functional extensions of these two systems. Therefore, ESP can be regarded as the most advanced form of automobile anti-skid device at present. ESP system consists of control unit, steering sensor (monitoring the steering angle of the steering wheel), wheel sensor (monitoring the rotating speed of each wheel), sideslip sensor (monitoring the rotation state of the car body around the vertical axis), lateral acceleration sensor (monitoring the centrifugal force when the car turns) and so on. The control unit judges the driving state of the vehicle through the signals of these sensors, and then sends out control instructions.

The difference between a car with ESP and a car with ABS and ASR is that ABS and ASR can only react passively, while ESP can detect and analyze the condition of the car and correct the driving mistakes before they occur. ESP is particularly sensitive to oversteer or understeer. For example, when a car turns left and oversteers (turns too fast), it will flick its tail to the right. When the sensor senses the slip, it will quickly brake the right front wheel to restore its adhesion and generate the opposite torque to keep the car in the original lane.

(Photo/Text/Photo: Pacific Auto Network Ling Xiufang)