The system of exchange rate stability - what is it? Installation and operation of the system of traffic stability

In modern cars there are many different systems that are designed to improve road safety. One of them is the ESP, or the system of exchange rate stability. What is it, knows not every driver. Let's see what is hidden under these letters and what advantages this complex gives to the driver of the car. Read!


The system was developed on the basis of ABS. On the one hand, this is a complex that is connected to the ABS, but the main part of the system is still unique. In this case, we are talking about a sensor that is responsible for the angle of rotation of the steering wheel. In addition, the work of the system of exchange rate stability becomes almost impossible, if there is no information on the actual position and corners of the car. So, when there is different data and the readings of several sensors that follow the steering wheel and the body, the EPS starts to automatically brake to prevent a possible skid. The braking process can be started both on all wheels, and on one or two.

How does it work?

Electronic stability control system ESP is necessary for elimination of emergency situations when the person at the wheel practically loses control. Most often, sensors and electronics are predicted when the driver runs the risk of getting into a difficult situation, and stabilizes the position of the car by slowing down individual wheels. For example, at the moment of entering the turn at high speed, the discs will begin to shift from their usual trajectory. At the moment, ESP (Stability Program ) will work. It activates the pads and, slightly slowing down, will help the car to get back on a safe course. Thus the person at the wheel can not lose control of the car. The main thing is that ESP (if it is not disconnected intentionally) works at any time and regardless of the speeds or crankshaft turns at the critical second. Some people think that ESP is the most effective that is available today. Its main advantage is in compensating for the lack of skills in driving a person and in neutralizing drifts. But do not assume that the ESP (Stability Program) is a panacea for all ills. Small turning radii or too high speed of the car can not break the system, but electronics can trite do not have time to perform calculations and assess the situation. So, this is a popular and best-known solution for driving safety. Automobile manufacturers can call this system in different ways, but the essence is always the same. The main function is to control the transverse dynamics and help the driver. However, this is not all the possibilities. Constantly control the grip of the road and ensure that the machine does not descend from the trajectory. Today, the VSC, EPS or DSC system is able to function in all conditions. But developers are forced to constantly make changes to algorithms.

From the history of ESP

The very first assistant complex, which was designed to monitor the trajectory of the machine, is the "Control Device", developed and patented in "Daimler-Benz". But due to the possibilities of that time, it was not possible to implement the system of automatic correction of the course of the car. Only in 94 the first truly effective and effective system of exchange rate stability was born. What is it, we already found out. After a year after this complex was shown, it was installed on the Mercedes CL-600. And in two years ESP will become almost an integral part of the electronic equipment of all Mercedes models, and regardless of the configuration.

"ESP - in the people"

Now everything is much simpler - there is such a system in almost any car, even in the middle configuration. в комплектации не оказалось, то многие автопроизводители предлагают ее в качестве опции. And if all the same stabilization of the stability of the stability in the complete set was not, then many automakers offer it as an option. True, for this it is necessary to pay a lot. The installation of the system of exchange rate stability will make it possible to feel more confident on the road in any conditions. But if you look at the proposals of serious and popular auto brands (Ford, Volkswagen and other European brands), even in basic equipment there is this security package.

How ESP works

Modern DCS is associated with ABS. And it is almost impossible to imagine how the VSC system works without a connection with anti-slip protection and without communication with the ECU. In this complex, many responsible nodes are involved simultaneously.

The device of complex СКУ

If you represent the DCS device in the form of a structure - this is the mass of sensors and controllers that allow you to obtain information about the movement of the machine from the computer, and then, if necessary, control the engine and brakes to restore the car's handling and stability. For those who do not know how the system of exchange rate stability works, the most important are only two elements. This is an angular velocity sensor and a G-sensor (or an accelerometer). The latter is responsible for measuring the lateral acceleration. The above mentioned elements are connected both with each other and with monitoring electronics. When the machine slides in the side, the system determines whether it is dangerous. After analyzing the digits, the data falls on the ESP block. The DCS then responds to the parameters and either activates the actuators or does nothing. He knows very well how much the steering wheel turns, at what speed the car drives, whether the skid is dangerous and whether it is necessary to start the emergency control system. Information from the sensors comes instantly.

Important feature

We need to consider one more feature that the system of exchange rate stability has. What it is? Due to the fact that the system is connected to the main sensors in the running gear of the car, ESP is able to compare the figures with the actual behavior of the car. That is, the computer determines whether the behavior of the car differs from the calculated figures. If the parameters are seriously different, the control unit will perform the digit adjustment and return the actual data to normal limits. This helps to avoid dangerous situations.

ESP operation mechanism

The work is based on the management of the engine, steering and braking system. To return the car to the calculated rate, the system will start the braking process on all or individual wheels. SKU can determine how much you need to reduce the speed of the wheels. In this case, the braking process is performed by several systems. ABS changes the pressure in the braking system, the supply of fuel to the combustion chambers is reduced, hence the speed on the wheels is also reduced.

When ESP can be turned off

Sometimes, when you need to master the machine masterly, in complex areas, a system that, in 95% of cases, helps to avoid terrible accidents, can play a cruel joke with a professional driver. However, the manufacturers also provided this moment. Now even with basic ESP this system can be disabled depending on the situation. In some cars equipped with electronic assistants, the ESP can operate in different modes - full and partial security. In the latter case, small skids and slides are allowed. That is, if you set the average level to the driver, nothing will stop. But in case of real danger, the system of exchange rate stability is fully activated. What it is? This is an electronic assistant, which helps to avoid emergencies.


In general, SCS is a unique system that has saved millions of lives. However, nobody could deceive physics, and the possibilities of electronics are far from limitless. And find out whether there is a system of road-holding in the car, you can in the instructions. Do not turn it off in the absence of a lot of driving experience. Especially if it concerns driving on a snow-covered road.

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