Do you want to turn on the body stability system sign when driving?
Body Electronic Stability System (ESP): It can control the driving wheel and the driven wheel at the same time, including ABS (Anti-lock Brake System) and ASR (acceleration slip regulation) anti-skid devices.
ESP body electronic stability system helps the vehicle to maintain dynamic balance by analyzing the vehicle running state information from various sensors and then sending rectification instructions to ABS and ASR.
The body stability system can keep the vehicle in the best stability under various working conditions, and the effect is more obvious in the case of oversteer or understeer.
ESP action mechanism
The function of ESP is that when the driver controls the car beyond the limit, the computer will automatically intervene to correct driving. There are two ways to control the vehicle movement by computer: the first way is to control the throttle to collect oil, attenuate the vehicle power and slow down the speed; The second means is to brake some wheels to reduce the speed to the limit. So how does the computer know whether the movement of the vehicle is close to the limit? This requires two sets of sensors to collect driving information for the computer. One set is the steering angle sensor of the steering wheel; One set is wheel speed sensor (one on each wheel). The former is used to collect the driver's steering intention, and the latter is used to monitor the vehicle movement. When the steering angle sensor of the steering wheel detects the steering angle of the driver, it will notify the ESP computer. At the same time, the wheel speed information measured by each wheel speed sensor will also be transmitted to ESP computer. The computer can calculate the actual trajectory of the vehicle according to the speed of each wheel. If the actual trajectory is different from the theoretical trajectory, or a wheel slips (loses grip), the computer will first inform the throttle to reduce the opening (collect oil). Then inform the braking system to brake a certain wheel and correct the motion trajectory. When the actual trajectory is consistent with the theoretical trajectory (driver's intention), ESP will automatically release the control.
working process
ESP: Body Electronic Stability System
1, this car turns left when the vehicle turns understeer (that is, turns 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.
Especially one that can save lives.
ESP is called "ESP that can save lives" by many world-famous automobile manufacturers and research institutions. A study in Germany shows that 25% of traffic accidents that cause serious injuries and 60% of traffic accidents that cause deaths are caused by vehicle sideslip. However, the situation of vehicles equipped with electronic stability program ESP is different: ESP is particularly sensitive to oversteer or understeer, can quickly identify this dangerous situation and react as quickly as lightning, accurately intervene the braking mode, so that the vehicle can drive safely on the right track and prevent the vehicle from slipping. Therefore, compared with cars equipped only with ABS and ASR, ESP can not only provide protection for drivers and passengers when accidents occur, but also effectively avoid accidents.
Current installation situation
At present, Volkswagen is the most comprehensive active security measure in ESP security package. Volkswagen's ESP active safety system includes ABS, EBD, EDL, ASR, MSR, CBC and other comprehensive active safety configurations, and integrates many active safety measures to provide passengers with the most comprehensive active safety guarantee. Compared with the active safety measures operated independently, this active safety package has the advantages of exchanging needed items and cooperating with each other. If ABS, EBD, EDL, ASR and other security measures are independent units, then ESP is a group army that can command and cooperate with all its units.
ESP (European and American ESP, Japanese manufacturer VSC or VSA) has been installed as a standard configuration in Europe and America. For example, in Germany, more than 70% of newly registered vehicles have been equipped with ESP. ESP has become the standard configuration of high-end cars, and the assembly rate of mid-range cars has also increased rapidly, while the assembly rate of compact cars is slightly lower. However, in China, the assembly rate of electrostatic precipitator is still low. Currently only common in high-end luxury cars.
In this regard, German car companies that have always been rigorous have done a good job, and sagitar, which sells for only a few hundred thousand yuan, also uses ESP as a standard. In addition to sagitar, Volkswagen also equipped ESP on all Volkswagen cars such as Beetle, Golf GTI, Phaeton, Magotan and Touareg. At the same time, it is worthy of our attention that the newly listed Magotan at the same level as Camry is far ahead in terms of high rigid body and passive safety configuration. When the vehicle equipped with ESP system has an accident, the serious injury rate can be reduced by 25% and the death rate can be reduced by 35%.
Manufacturers often make a fuss about the configuration when promoting new cars, such as reversing radar and imitation mahogany interior, which are often used as selling points. In fact, these things are not of much value. A reversing radar only costs tens of dollars in auto parts city. On the contrary, many manufacturers rarely talk about the auxiliary safety configuration of cars, because these configurations are expensive. For example, at present, cars do not have ESP installed as standard, and these configurations are really related to the interests of consumers. The United States will adopt ESP as a mandatory vehicle configuration on 20 10, and Europe is also studying this issue. At present, China has not put this issue on the agenda. I hope relevant departments will also pay attention to these most critical security issues.