Cruise control in the car: what it is, the pros and cons

Few drivers know in the car. Meanwhile, this is an old system, which previously could only maintain the speed of the car, and the driver did not have to hold the gas pedal. This system provided additional convenience and comfort when driving on highways and highways. As a result of using cruise control, the driver behind the wheel gets tired less. Also, in theory, it helps to reduce fuel consumption, since the engine runs evenly when using the system, and its speed does not jump.

cruise control in the car what is it

What is the cruise control in the car?

This system is needed to provide additional convenience when traveling long distances. For example, if a driver needs to get from one city to another, having overcome 500-600 kilometers, then he will have to hold the gas pedal for 5-6 hours by car without this system, which is actually equal to right foot in an uncomfortable position.During the whole time of the trip, I want to change the position of the leg, but this cannot be done. It seems that it is a trifle, but to hold the gas pedal for 5-6 hours is actually very difficult.

cruise control what is it in the car

By activating the cruise control in the car, the driver can afford to release the gas pedal. The system will supply fuel to the combustion chambers not through the gas pedal, but through special pneumatic actuators. The driver will be able to adjust the speed using the buttons, which are located on the steering wheel (there are usually 5 buttons).

System management

Why do you need cruise control in the car?

Now, when we understand what it is - cruise control in the car, you can figure out how it works. Usually there are 5 buttons on the steering wheel to control this system:

  1. An On / Off button that activates and deactivates the system.
  2. Speed ​​fixation and speed increase switch. That is, after acceleration to the desired speed, the driver can use a switch to fix the current speed and release the gas pedal. Subsequent pressing this button will increase the speed of movement by 1 km per hour.
  3. If during the use of cruise control the driver had to sharply accelerate or slow down by pressing the gas or brake pedal, the parameters of this system are reset.To quickly activate the cruise control and return to the speed set earlier, the driver must press the Resume button.
  4. Coast Speed ​​Down Button. Each press of the button reduces the speed by 1 km. In some models, the step of reducing and adding speed is 1.5 km.
  5. The Cancel button deactivates the system.

Depending on the car model, this system may be represented by other buttons, the step of dialing and slowing down the speed may differ. But the principle looks exactly as described above.

 adaptive cruise control cars


There are several types of cruise control in the car. What does passive or active type mean? In the first case, the driver can only set the speed of the car. However, the second type involves the use of complex electronic devices that scan the space in front of the car, which opens up additional possibilities for controlling the vehicle, depending on driving conditions.

Passive type (PPC)

As we have already found out, passive cruise control allows you to keep a given speed, which is convenient for long journeys over long distances.Due to the constant speed of the engine provides fuel savings.

Turning off the control is carried out with a weak pressure of the driver on the gas pedal. The design of this system has a special pneumatic drive, which regulates the flow of air-fuel mixture into the combustion chamber through the throttle valve. This eliminates the need to use the gas pedal.

Active (or adaptive) type

Adaptive cruise control is an enhanced version of the active type. In addition to the possibility of maintaining the speed limit without pressing the gas pedal, cars with adaptive cruise control can calculate the distance to the vehicle ahead, and also reduce or add speed depending on the situation on the road. That is, if the system determines that the distance to the car ahead is reduced, then the system also reduces the speed of movement. The reduction of speed is carried out until such time as the gap between the cars, according to the system, is optimal. If the sensor ceases to see an obstacle in front, the car picks up speed and keeps this speed mode.

cruise control car installation


Adaptive installation of cruise control on the car is smart enough, it provides not only comfort when driving on highways and highways, but also driver safety, which can relax too much on the road.

In addition, this system can produce not only emergency braking, but also evasive maneuvers. This greatly increases safety while driving, and often such systems preserve the lives of people and the integrity of the car itself in various situations on the roads.

Note that adaptive (or active) cruise control is closely related to the operation of ABS and ESP systems (stabilization and anti-towing systems), and if at least one of them stops working, then it is also impossible to activate cruise control.

Dynamic type

In addition to adaptive and passive cruise control, there is also a dynamic one. It is one of the varieties of the passive type. A feature of this system is the control of the engine, which saves fuel and engine life.

function cruise control in the car

For example, when climbing a hill, the system brakes and slows down the speed, which protects the motor from excessive loads.Also, the speed is reduced and in the event of any problems with the engine and when the vehicle enters the turns. After passing the turn, the previous speed is restored.

Now we figured out what it is - cruise control in the car. We define its main advantages and disadvantages.


The advantages of this system are obvious to every driver. First of all, it is comfort when driving and reducing the load on your back due to the absence of the need to keep your foot on the gas pedal. Some drivers have noted fuel economy as the merit of such a system. In theory, savings are achieved by ensuring the uniformity of the engine and the absence of differences in fuel injection. In addition, if an adaptive cruise control is installed, it also provides additional vehicle safety.


The main disadvantage is the high cost of the system. Cars with cruise control systems are expensive and inaccessible to most consumers. However, cars with conventional passive systems are already available to the middle class of consumers.

According to some drivers,actively using this system, fuel economy is completely absent, and in some cases there is even increased consumption. Another serious drawback is the insecurity of using the system due to the fact that the driver can relax too much while driving. Constantly keeping your foot on the gas pedal, you will not be able to relax much.

which means cruise control in the car

The next disadvantage is the inability to use the system on roads with frequent descents and turns, as well as on roads with intensive traffic. About the use of the system in the city in general can not speak.

Many drivers do not recommend using this system on the roads after or during the rain, as the driver needs to feel the car when braking. Otherwise it may lead to an accident. This system is suitable only for drivers who often travel from city to city. In urban traffic, the function is practically useless, since there are no long sections of the route in the city where you could keep a steady speed for a long time.


Now we finally understand what it is in the car - cruise control.Such a system is really useful and necessary - it should be in every car. Gradually, such systems appear in the machines of the middle and even budget class, but so far it is just a passive variety. In addition, this system can even be installed on a car in which the manufacturer does not provide for this technology. Special installations are sold in auto shops.

At this point you can put an end. We figured out what it is - cruise control in the car. The technology is useful in some cases, but you should not get involved in it, because the driver should not lose concentration on the road.

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