Function introduction of ESP
ESP body stability system is a very important safety configuration of automobile, and its importance can be imagined. Many western countries will force automakers to use ESP as a standard configuration, and sales are not allowed without ESP. Since ESP is so important, what is its function?
In rainy and snowy weather, vehicles are prone to skid (especially when turning). At this time, ESP can reduce the risk of sideslip. ESP is particularly important when driving on the highway, especially in emergency situations (such as steering wheel or flat tire), which can greatly protect the stability of the car and reduce the risk of rollover. Therefore, when buying a car, it is recommended to choose a model with ESP, especially for friends who often run at high speed. We certainly don't want ESP to play a role in driving, but once an accident happens, ESP can protect the safety of vehicles and people on board to a greater extent.
Introduction of working principle of electrostatic precipitator
Under certain road conditions and vehicle load conditions, the maximum adhesion provided by wheels is a fixed value, that is, in extreme cases, the longitudinal force (along the rolling direction of wheels) and the lateral force (perpendicular to the rolling direction of wheels) exerted by wheels are a trade-off. The electronic program can independently control the longitudinal braking force of each wheel, thus affecting the lateral force and improving the handling performance of the vehicle.
When turning, the feasible control strategy is as follows: when the vehicle tends to understeer, the system can apply braking force to the rear wheel inside the turn. With the increase of the longitudinal force of this wheel, the lateral force it can provide decreases, and then the steering torque is generated on the car body; When there is a tendency to oversteer, the system can apply braking force to the front wheels outside of turning. With the increase of the longitudinal force of this wheel, the lateral force it can provide decreases, and then the steering resistance moment is generated on the car body. Thereby ensuring driving stability. Part of the electronic stability program system will also reduce the power of the engine when the vehicle is out of control.
When an obstacle suddenly appears in front of the vehicle, the driver must turn left quickly. At this time, the steering sensor transmits this signal to the ESP control assembly, and the sideslip sensor and the lateral acceleration sensor signal that the vehicle is understeer, which means that the vehicle will directly rush to the obstacle. At this time, the ESP system will instantly brake the rear wheel, thus generating the reaction force required for steering, and the car will travel according to the steering intention.
ESP is the name of major automobile brands.
The body electronic stability system is a patent of Bosch. Of course, other companies have developed similar systems, such as BMW's DSC, Toyota's VSC and so on.