EPS refers to Electronic Stability Program (ESP), which was invented by Bosch, a famous supplier of automobile parts. Mercedes-Benz applied it to A-class cars for the first time. ESP includes ABS and ASR, 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.
EPS component
Sensors: steering sensor, wheel sensor, sideslip sensor, lateral acceleration sensor, steering wheel accelerator brake pedal sensor, etc. These sensors are responsible for collecting data on the state of the car body.
2.ESP computer: calculate the data collected by the sensor, calculate the physical state, and compare it with the preset data in the memory. When the data calculated by the computer exceeds the pre-stored value in the memory, that is, when the car body approaches or is out of control, the actuator is ordered to work to ensure that the driving state of the car body conforms to the driver's intention as much as possible.
3. Actuator: To put it bluntly, the actuator of ESP is the braking system of four wheels. In fact, ESP is to help drivers step on the brakes. Unlike a car without ESP, the brake system of a car with ESP has the function of accumulating pressure. Simply put, pressure storage means that when the driver doesn't step on the brakes as needed, the computer can pressurize the brake pipe of a wheel for the driver to make the wheel generate braking force. In addition, ESP can also control the power output of the engine. Anyway, he can get involved in related equipment!
4. Communication with the driver: ESP light on the dashboard.