Is the body stability system important? Why aren't there many cars?

What the landlord said is ESP, which is the abbreviation of electronic stability control system (electronic stability program). It is a braking system, which is used to prevent the vehicle from slipping under emergency driving conditions. Its main feature is initiative. If ABS reacts passively, ESP can nip in the bud. ESP was first developed by Bosch in Germany on 1997, and was first applied to its A-class cars by Mercedes-Benz. Later, other companies also studied their own electronic stability control system, but the name is different, but the principle is the same. For example, Mercedes-Benz, Volkswagen, Audi, Citroen, Peugeot and Hyundai are called ESP, BMW and Mazda are called DSC, Honda is called VSA, Toyota is called VSC, and Nissan is called VDC. Brief introduction to the working principle of ESP: The ESP system consists of central control unit (ECU), steering sensor, wheel sensor, side slip sensor, lateral acceleration sensor and actuator, and its purpose is to intervene and adjust the engine and braking system on the premise of real-time monitoring the running state of the vehicle by computer. During driving, the angle sensor senses the driver's turning direction and angle, the speed sensor senses the speed, throttle opening and speed torque, the brake sensor senses the braking force, and the swing sensor senses the inclination and roll speed of the car. After knowing this information, ECU can judge the gap between the normal and safe driving of the car and the driver's intention to operate the car through calculation. Then, the ECU issues instructions to adjust the engine speed and the braking force on the wheels, so as to correct the oversteer or understeer of the automobile, avoid the automobile from slipping, oversteer, understeer and locking, and ensure the driving safety of the automobile. Strictly speaking, ESP system actually includes the functions of ABS and TCS (Traction Control System), but it is not a simple superposition of them. The main difference between them is that ABS and TCS can only react passively, while ESP can detect and analyze the vehicle condition and correct the driving error before it happens. The function of ESP can be reflected in the following three working conditions: "driving on a changeable road", "avoiding obstacles", "the driver turns too fast" and "ESP". The important role of ESP: Every year in Europe, 50,000 people die from traffic accidents, and 6,543.8+0.3 million people are injured by traffic accidents. A study in Germany shows that 25% of accidents that cause serious injuries are caused by skidding. ESP can stabilize the vehicle and reduce the risk of skidding. Research shows that ESP can reduce 50% of serious traffic accidents. Today, more than 35% cars in Europe are equipped with ESP technology, and every Audi car comes standard with ESP, which has become a symbol of active safety. In the United States, the center of the world automobile industry, the Ministry of Communications and NHTSA National Highway Traffic Safety Administration, representing the American government, issued an important policy that affects the global automobile safety trend at the new york Auto Show in April this year: from September of 20 1 1 year, all new cars with 20 12 sold in the United States must be equipped with ESC electronic stability control before they can be sold in the American market. It can be seen that the United States attaches great importance to the great role of active. Bosch's ESP body electronic stability system ESP and electronic stability program are Bosch's patents [1]. 10 years ago, Bosch was the first company to put electronic stability program (ESP) into mass production. Because ESP is a patented product of Bosch, only Bosch's body electronic stability system can be called ESP. After Bosch, many companies have developed similar systems, such as vehicle dynamic control system (VDC) developed by Nissan [2] and vehicle stability control system (VSC) developed by Toyota [3]. Vehicle stability auxiliary control system (VSA) developed by Honda [4], dynamic stability control system (DSC) developed by BMW [5] and so on. ESP Overview ESP system is actually a traction control system. Compared with other traction control systems, ESP can control not only the driving wheel but also the driven wheel. For example, rear-wheel drive cars often turn too much. At this time, the rear wheel is out of control and the ESP will slow down the outer front wheel to stabilize the car. When the steering is too little, ESP will slow down the inner rear wheel to correct the tracking direction, thus correcting the driving direction. ESP system includes ABS (Anti-lock Brake System) and ASR (Anti-Side Slip System), 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. Of course, there is a limit to everything. If the driver drives too fast blindly, it will be difficult to keep any existing safety devices. ESP consists of 1, and its sensors include steering sensor, wheel sensor, sideslip sensor, lateral acceleration sensor, steering wheel accelerator 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. The workflow of ESP is 1. This car turns left when the vehicle is understeering (that is, turning too fast). The ESP sensor will tell the computer the news of understeer, and then the computer will control the brake of the left rear wheel to generate tension and torsion to counter the understeer trend of the front wheel pushing to the right. 2, or turn left, when the rear wheel grip is insufficient or the accelerator driven by the rear wheel is pressed hard, there will be excessive steering (that is, ass dumping). ESP will control the right front wheel brake and reduce the power output of the engine. Correct the wrong steering posture. 3. When the linear brake deviates due to uneven ground adhesion (cars with ABS will also appear. When it snows, I always play in the snow, and my car will go sideways. ESP will control the wheels with strong adhesion to reduce the braking force and let the car follow the driver's expected driving route. Similarly, when turning while braking, ESP will also control some wheels to increase or decrease the braking force, so that the car can run according to the driver's intention.