ESP Electronic Stability Program is the English abbreviation, Chinese name is an electronic stability program. Some car company also uses its own acronym, such as the Volvo company called STC, BMW car was called DSC, Toyota Lexus also known as the VSC, Ford is known as ESC, but their basic principles and the role played with ESP is the same.
1.ESP vehicle stability control
ESP its English name is: Electronic Stability Program, comprising ABS and ASR, extending the functions of the two systems. Is responsible for monitoring vehicle running state at any time, it is possible by applying automatically to one or more wheel braking force, braking or even 150 times per second, in some cases, the car remains within the driver to the selected lane. There are currently three types:
● automatically applied to all four wheels independently of the braking force or four four-channel system;
● only on the two front wheels independently applying a braking force dual-channel system;
● braking force can be applied only to the two front wheels with the rear wheel braking force independent three-channel system.
ESP with ABS and traction control systems to work together, but now they are different is that it does not require the driver to operate it, and It is to react according to their actual situation. ESP fitted with a driver’s car is no longer blindly obey, for example, the driver can correct oversteer and understeer. For example: a car on a slippery left curve, so that when the car starts to oversteer rightward flick, ESP sensors felt slide quickly so that the right front wheel brake, the automobile produce clockwise rotation moment, while holding the car in the original lane; understeer when the front wheels to leave the road surface lost adhesion on the ground, ESP Quad let the left rear wheel brake, thereby generating a counterclockwise rotation moment the car back on the right path (if the car is loaded ESP dual-channel, then make a left front wheel brake).
ESP for oversteer and understeer feeling of sensitivity than the world’s best racing athletes. Today, Bosch, Denso (Denso), Continental Teves, Delphi, Aisin Seiki and TRW and other six auto parts suppliers in the production of ESP. ESP work with micro-computer based algorithm. Microcomputer information from several sensors are evaluated. While various manufacturers use different software, but their ESP has the following hardware:
● steering sensor: It monitors the rotation angle of the steering wheel, to help determine the correct direction of travel.
● wheel sensor: It monitors the speed of each wheel, whether the wheel slip.
● yaw sensor: it records the car movement about a vertical axis, it is determined whether the car slipping.
● lateral acceleration sensor: a centrifugal force generated when turning it reacts, it is determined whether the vehicle passes through the curve at a slip
ESP now mainly used in some high-end models, such as Mercedes Benz, Audi in the EU, new cars equipped with ESP percentage rate has reached 35, while domestic new car equipped with ESP system also only 3 percentage rate, as people demand more and more put the safety of vehiclesHigh, ESP will be applied more and more vehicles.
2.ESC vehicle stability control system
ESC vehicle stability control system, the same principles ESC (Electronic Stability Control) and the ESP system and a control method.
3.DSC dynamic stability control system
DSC dynamic stability control system, DSC (Dynamic Stability Control), DSC properties similar to Bosch’s ESP (electronic stability system) can be when the high-speed sports car, provides good handling, prevent the occurrence of vehicle drift or drift to obtain precise handling. It is an electronic active safety protection system.
DSC system in order to make the car still good tracking of the turn, with more advanced detection and control equipment, can detect if the wheel speed, there is detected the amplitude of rotation of the steering wheel, a vehicle speed and the lateral acceleration of the car, according to the above detected information to determine the risk of the wheel is slipping during cornering, if there is a risk of skidding or slipping has been, the computer will immediately command brake hydraulic pressure control system the appropriate slipping wheel braking effect is reduced or the fuel injection amount, the ignition delay of the engine output power is reduced manner, reaching the tire to prevent slipping under various driving conditions phenomena, and thus whether the vehicle starting acceleration, re-acceleration, cornering, etc. can get better tracking of the process.
4.VSC vehicle stability control system
VSC vehicle stability control system, VSC (Vehicle Stability Control), and developed by Toyota in its application models. VSC as an auxiliary control system of the vehicle, it can control the skidding phenomenon due to the steering wheel too hard or slippery road surfaces caused. When the sensor detects the vehicle skidding, the system can automatically control the engine power and braking respective wheels.