ESP’s full name is Electronic Stability Program, which we often call the body stability control system. It is a further expansion of the functions of the car's anti-lock braking system (ABS) and traction control system (TCS), and is also part of the car's active safety system.

Vehicle stability control systems have many different names. Honda is called VSA, Toyota is called VDIM, GM (domestic models) is called ESC, etc. Although the names are different, the principles are almost the same.

ESP is mainly composed of three parts: sensor, actuator and electronic control unit (ECU). Sensors generally include wheel speed sensor, steering wheel angle sensor, lateral acceleration sensor, yaw angular rate sensor, and brake master. Cylinder pressure sensor, etc.

Actuators generally include traditional braking systems (vacuum boosters, pipelines and brakes), hydraulic regulators, etc., while the electronic control unit is linked to the engine management system to intervene and adjust the engine power output. .

Extended information

The importance of ESP

1. Research by the Insurance Institute of Highways in North America (IIHS) shows that installing ESP can effectively reduce fatal accidents by 43% Traffic accidents;

2. Research conducted by the U.S. Highway Safety Administration (NHTSA) also shows that making ESP a standard configuration can effectively reduce 34% of car single-vehicle accidents and 71% of car rollover accidents. SUV single-vehicle accidents can even be reduced by 59%;

2. ESP is mainly used to deal with the risk of tail drifting and loss of control caused by continuous steering during emergency avoidance of obstacles. When evading in an emergency, ESP intervenes to increase the rotational force of the drive wheels; when there is a tendency to drift, ESP will brake the other wheel to weaken the rotation, thereby helping the vehicle comply with the driver's steering intention.

Baidu Encyclopedia - Body Electronic Stability System