ABS = Anti-lock Braking System or Anti-skid Braking System, which is a car safety control with the advantages of anti-skid and anti-lock. system. ABS is an improved technology based on conventional braking devices, and can be divided into two types: mechanical and electronic. ABS was first patented in 1906, and in 1936 Bosch registered a patent for a "mechanical" mechanism to prevent wheel locking of motor vehicles. Anti-lock Braking System (English: Anti-lock Braking System; German: Antiblockiersystem; ABS for short), a technology developed by Robert Bosch GmbH and used in motorcycles and cars to improve vehicle safety.
EPS refers to the Electronic Stability Program (ESP), which was invented by Bosch, a famous auto parts supplier, and was first used by Mercedes-Benz in its A-class cars. ESP includes ABS and ASR and is an extension of the functions of these two systems. Therefore, ESP can be regarded as the most advanced form of current automobile anti-skid device. The ESP system consists of a control unit and a steering sensor (monitoring the steering angle of the steering wheel), a wheel sensor (monitoring the speed of each wheel), a sideslip sensor (monitoring the rotation of the car body around the vertical axis), and a lateral acceleration sensor (monitoring when the car is turning). centrifugal force) and other components. The control unit uses the signals from these sensors to judge the operating status of the vehicle and then issues control instructions. The difference between cars with ESP and cars with only ABS and ASR is that ABS and ASR can only react passively, while ESP can detect and analyze vehicle conditions and correct driving errors before they happen. ESP is particularly sensitive to oversteer or understeer. For example, when a car turns left and oversteers (turns too sharply) on a slippery road, it will drift to the right. When the sensor senses the slip, it will quickly brake the right front wheel to restore steering. Apply force to produce an opposite torque to keep the car in its original lane.
EPS composition
1. 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 status of the vehicle body.
2. ESP computer: Calculate the data collected by the sensor, calculate the body status and compare it with the preset data in the memory. When the computer calculation data exceeds the pre-stored value in the memory, that is, when the vehicle body is approaching or has lost control, the actuator is ordered to work to ensure that the vehicle body's driving status can satisfy the driver's intention as much as possible.
3. Actuator: To put it bluntly, the ESP actuator is the braking system of the four wheels. In fact, ESP helps the driver apply the brakes. Unlike cars without ESP, the brake system of a car equipped with ESP has a pressure accumulation function. To put it simply, pressure accumulation means that the computer can pressurize the brake oil pipe of a certain wheel for the driver when the driver does not apply the brake according to needs, so that the wheel can generate braking force. In addition, ESP can also control the power output of the engine and so on. Anyway, he can get involved in related equipment!
4. Communication with the driver: ESP light on the instrument panel.