What is full cruise control. What is cruise control and how to use it

To begin with, let's define the terms and analyze what cruise control is - this is a modern automotive device that is designed to maintain the speed set by the driver by car, if necessary, automatically increase or decrease it on certain sections of the road without the participation of the driver.

In other words, it is the most efficient and reliable assistant for any motorist when traveling long distances. In most cases, cruise control is used while driving on highways, but in urban areas it is usually useless http://propuskavmoskvu.ru/index.php/razreshenie-na-negabarit.

Cruise control has become most widespread in the United States, however, European car owners are increasingly purchasing cars equipped with such systems.

How cruise control works

The system has a wide functionality that allows you to control and maintain a constant speed, increase and decrease it, for example, when ascending or descending, when detour, etc. And all this becomes possible only by pressing one control button, which allows you to change the speed of movement for every 2 km / h.

For example, if you need to reduce or increase the speed by 16 km / h, just press the control button 8 times. Disabling the control system on different vehicles can be done in different ways.

Sometimes, to completely stop the system, you need to press the brake pedal and reduce the speed to 35 km / h, and sometimes just press the brake or gas and the car will go into manual control.

What is cruise control

A few words about the cruise control scheme. So, we have already determined that the system automatically maintains the set speed in a given direction.

A modern cruise control system consists of a computer, a servo, a sensor, solenoid valves, a vacuum turbo line, a diaphragm and its cable.

The system coordinates the throttle through sensors that detect the vehicle's speed and feed the data to the throttle. Among other things, the system monitors the position of the operating buttons and pedals, changing the driving speed, reducing or increasing it.

Cruise control

The modern cruise control system is controlled using the main buttons (may differ depending on the model):

On - turns on the system;
Off - turns off the system;
Set/ Accel - sets, and also increases or decreases the set speed (when pressed again);
Resume - restores the previous value of the set speed;
Coast - reduces the speed of movement, sometimes it acts as a brake;

The two main pedals (brake and clutch) are equipped with special switches that allow you to turn off the cruise control when you press one of the pedals.

The control center of the entire system is a special computer, which is located on the control panel. The computer connects to the throttle and sensors to effectively coordinate the operation of the entire system.

Cruise control throttle control is implemented using diaphragm cables that connect to a small hinge element that opens the throttle.

One cable connects to the gas pedal, the other to the servo. When the cruise control is started, the servo actuates a cable that regulates the throttle, another cable allows you to use the gas pedal when the system is already active.

Adaptive cruise control

The calculation of the required speed is set based on the main indicators - distance, acceleration and proportions of the car. This is the basic principle of the passive cruise control system.

A more advanced and multifunctional system is adaptive cruise control, which allows you not only to set and maintain the desired driving speed, but also to maintain a safe distance of your car in relation to others.

Adaptive cruise control is often equipped with a special sensor, which, using a signal, allows you to monitor and coordinate the desired speed of driving a car.

This system consists of the following elements:

sensitive sensor to determine the desired speed and distance between any vehicles;
electronic control controller;
signal processor that executes controller commands

The principle of operation of such a system is quite simple. Using a sensor, the system determines the safe distance between cars, setting the desired speed. When the distance is reduced, the system transmits appropriate impulses to the engine and braking system for timely braking of the vehicle.

As soon as the distance is restored or the obstacle is cleared, the cruise control picks up the previously set speed.

Currently, adaptive cruise control is considered to be the most effective and promising vehicle control system.

A modern car is not as simple as it might seem at first glance. An incredible number of various electronic assistants, complex systems and options allow you to multiply the comfort of driving your iron horse and save the driver's strength and nerves. Today we will talk about such an indispensable assistant as cruise control, and the specifics of its work on cars with manual transmission.

General information

To understand how cruise control works on a manual transmission, it is worth familiarizing yourself with the features of its operation in more detail and at least approximately knowing the structure of such complex electronics.

Cruise control is designed to keep the vehicle at a constant speed without driver intervention.

In other words, the driver does not have to once again pull his foot to the pedals to adjust the speed and constantly take care that the car does not lose speed on the highway.

Many claim that cruise control, as such, is a useless system and not so necessary on modern cars. The main argument in such a controversy is that many cars in the recent past did not a priori have such an option even in the maximum trim levels, and only a certain and rather narrow number of premium models were equipped with the coveted set of keys on the steering column lever.

However, in a certain number of cases, it will be so easy to do without this option. To understand whether it makes sense to purchase an option package that includes cruise control, it is worth understanding where the car most often moves.

If the car spends most of the time in the city, jostling in traffic and driving in variable speed mode, there is no point in cruise control. Otherwise, you will have to constantly “play” with the controls and thereby constantly load the already sensitive and expensive electronics.

Things are completely different if the driver constantly has the need to move along the highway, away from cities. For example, long-term driving on a flat, straight road requires constant force applied to the accelerator pedal. If the driver constantly keeps the foot in the same position, it will quickly get tired and numb. To prevent this from happening, one has only to activate the desired button, and the leg can be immediately released.

Instructions for use

As you know, cruise control is the prerogative of a car that works with an automatic transmission. Indeed, on a car with an “automatic” it will be much easier to manage cruise control - just press the gas pedal, accelerate your car to the required speed and fix the speed mode using the button on the steering column or dashboard.

However, as surprising as it may sound, there are a number of manual transmission models on the market, where cruise control also works. On the mechanics, such a system has several features, expressed in the nuances of its use during trips.

How to use cruise control? How does it work, and what do you need to know about such systems? Let's figure it out.

Typically, the control panel for the cruise control system is located on the stalk, which, in combination, controls the lighting or wiper blades. The main controls are two switches with a two-way principle of operation. They can be tilted to the left or right, depending on what needs to be activated.

The first switch is the cruise control enable lever. It should be transferred from one extreme position to another, the system will be activated and will be ready to work in the specified mode. Immediately on the on-board computer of the car, the corresponding indicator lights up, and on the dashboard - an icon depicting a speedometer with a limited scale. It is often possible to reset the steady-state speed readings and deactivate the system with the same key.

Another switch is the adjustment of the operating mode and the key for fixing the current speed. So, on cars with manual transmission, you need to select the desired gear, disperse the car and press the lock button. The current speed will be displayed on the dashboard, and the car will automatically maintain it without the help of the driver.

If for some reason it is necessary to adjust the speed, and the cruise control is already activated, then there is no need to reset the current readings and accelerate or brake the car yourself. It is enough to move up or down the switch responsible for fixing the current speed. At the same time, the value of the fixed speed on the dashboard will change up or down, and the car will instantly accelerate to the set value.

A feature of cruise control on vehicles with manual transmission is the inability of the system to change gears on its own. In other words, when adjusting the speed, you will have to choose the gear yourself, and when accelerating, control the transmission manually: otherwise, there are no differences from systems on automatic transmissions.

Results

Cruise control is definitely a useful feature for those who most often move around the track. Such electronics will not only save the driver from fatigue, but also seriously save fuel. Driving the car at a constant speed will reduce the rate by 20-30 percent.

During long trips, many drivers are faced with the fact that constantly keeping the foot on the gas pedal in a fixed position leads to rapid fatigue. It is to simplify driving when driving long distances in modern cars that a system called cruise control is installed.

Take cruise control on a long journey

That's why it's so important to learn how to use cruise control on long journeys. Currently, the installation of such a system is possible both on cars with manual gearboxes and automatic ones.

What is cruise control

cruise control is a system designed to automatically maintain the speed set by the driver. Activation of this system in the car allows you to maintain a given speed mode, regardless of the terrain, while not resorting to the tiring mechanical impact of the foot on the accelerator pedal.

In cases where traffic conditions require an increase in speed, for example, to overtake a passing vehicle, the driver simply presses the gas pedal and the car accelerates. To slow down the same car, the driver.

Pressing the brake and gas pedals temporarily disables the cruise control.

However, when such manipulations stop, the system automatically activates and restores the previously set speed, information about which is stored in the internal memory of the device.

Automatic speed control (cruise control)

The adjustment system has a cruise control switch - usually in the form of a single button. However, there are options with several buttons for different functions. Standard cruise control has a button that allows you to activate and deactivate the system. Another button, labeled "set", is used by the driver when the car reaches the desired speed. To improve information content, the corresponding indication is displayed, reflecting all actions with cruise control. The increase in motorway traffic has meant that the standard cruise control, referred to as passive cruise control, is increasingly being replaced by adaptive cruise control, which is a more advanced version of the system.

The main advantage of adaptive cruise control is the presence of additional functions that, although they do not replace the driver, make it much easier to drive and make it more comfortable. Such functions include automatic maintenance of the distance to the vehicle in front, prevention of unauthorized rolling down slopes, automatic braking in the event of an obstacle, etc.

Cruise control

Cruise control can be activated while driving or when the vehicle is parked. Turning on the system is accompanied by a corresponding light indication on the dashboard, the color of which depends on the car model.

Depressing the cruise control lever causes the vehicle to pick up and hold the last speed stored in the memory.

As a rule, speeds of 40 km/h and above can be recorded in it. The presence of an emergency function in the cruise control allows you to instantly turn it off when you press the brake pedal.

Cruise control switch button

To control the cruise control function in some car models, only one button is used, pressing which leads to the automatic activation of the system. Disabling cruise control in this case is done by pressing the driver on the brake pedal. If there are five standard buttons on the car panel or a special cruise control lever, the system is turned on in a slightly different way. Pressing the “on” button brings the on-board computer to a ready state, and the cruise control is activated by pressing the “set” button, after which the speed is adjusted by pressing the gas pedal.

In order to determine the order of inclusion of the cruise control system installed on a particular vehicle, it is necessary to carefully examine the control lever for it. The simplest cruise control systems, which are controlled by just one button, are automatically activated when it is turned on and turned off when the brake pedal is pressed. The speed is controlled by pressing the accelerator pedal. In other cases, when cruise control is controlled using five standard buttons, turning on cruise control (“on” button) only means that the car’s on-board computer is ready to activate this system, which is done by pressing the “set” button at a speed set using the gas pedal.

Some features for different types of cars

Two of the additional buttons are for increasing and decreasing vehicle speed. In most cases, each press increases or decreases the speed by 1 km/h.

cruise control can have multiple buttons

Here is a small instruction: cruise control is controlled by additional buttons

Acceleration. Lightly pressing the lever and holding it in this position allows you to pick up the desired speed without the driver pressing the gas pedal.
The set speed is fixed and written into the device memory by releasing the lever.

Interruption (failure) of the set speed occurs when the current speed for 1 minute exceeds the one recorded in the memory by 10-16 km/h (depending on the brand of car), or the current speed is lower than the set speed by 8-10 km/h. To correct the speed of movement, it must be recalled from the memory of the cruise control or set and saved again.
slowdown. Deceleration using cruise control is performed in the same way: the corresponding button (lever) is pressed and, after reducing the speed to the required speed, is released. In this case, the speed is fixed, and its value is stored in the device's memory. Short-term pressing leads to a decrease in speed by 1 km / h. In some cars, for example, BMW 525td, as well as cars equipped with an automatic stability control system, in order to maintain speed, you need to write the set speed to the device’s memory and then the memory, relatively speaking, of this device already helps to use cruise control.
Shutdown. The system is turned off by lightly pressing the corresponding button. The current driving conditions do not matter.

Turning off the engine leads to the erasure of the speed recorded in the device's memory.

In addition, cruise control is deactivated when the driver brakes, at accelerations exceeding 1.5 m/s and when the automatic transmission control lever is moved to the neutral position (position N).

How to use cruise control

Dedicated switches on the clutch and brake pedals allow you to adjust the disengagement of the cruise control. The system also provides for the installation of a pneumatic control throttle valve, which allows the car with activated cruise control to move without the driver pressing the gas pedal. In this case, the fuel supply is adjusted using a special cable attached to the throttle valve.

Thus, the cruise control control unit is a real minicomputer that quickly analyzes a lot of data entering it and maintains a given speed mode, being a good example of the real implementation of the theory regarding automatic control systems.

Think Safety

Ride comfort is not only about the driver's feelings.

A tired driver can make a mistake that will lead to very sad consequences.

This is especially important. A few hours of driving, and even a few days in a row, will cause anyone, even a physically strong person.

cruise control is important for driving safety

Video - how to use cruise control

Conclusion!

Modern means of improving comfort are offered by car manufacturers, including to eliminate such unpleasant complications. Even a novice driver with little experience can benefit from learning how to use cruise control while driving. This is not particularly difficult and does not require large labor costs. But it will only benefit.

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When choosing a car in a car dealership or in the secondary market, you always ask for its main characteristics and additional options. One of these additional options, among others, is cruise control.

What is this fancy option in a car - cruise control?

If literally translated, it turns out "travel control". Basically, that's the way it is. That's just the system does not monitor the route of your trip or fellow travelers, but your speed. Cruise control allows you to constantly maintain the speed you set for the entire route. It automatically adds throttle when the speed drops, and reduces - when the car is going too fast, for example, when subjected to centrifugal force on descents.

This option is usually used when driving long distances - on a highway where there are no frequent speed changes or constant braking, for example, at traffic lights or in a traffic jam. You don't need cruise control in town. So, if you plan to drive a car only around the city, you can, in principle, not spend money on an additional option.

The history of the system

Cruise control was invented more than half a century ago - in 1958. The first car with cruise control was the Chrysler model, the Chrysler Empire. For that time, a car with this option was considered almost a spaceship. Having cruise control was considered the pinnacle of automotive prestige. But then the system often crashed. And in the driver's everyday life, cruise control firmly entered only in the 1970s.

At that time, gasoline became very expensive, and drivers were looking for different ways to save on fuel. And remember cruise control. The system was finalized and put into action. After all, when a constant speed is maintained, without sharp accelerations and braking, gasoline is spent many times less, and the leg does not get tired - you do not need to constantly press the gas pedal.

All in all, drivers only had to press the cruise control button, select the desired speed, and enjoy a comfortable ride, keeping their eyes on the road, of course. In fact, nothing fundamentally has changed since that time. There were only qualitative improvements in the mechanism.

Types of system control

There are two types of cruise control: passive and adaptive (or active). Passive cruise control is considered traditional. Adaptive is a novelty in the automotive industry, it is constantly being improved. Its essence is that such control over the car will be taken as a fundamental factor - the speed of the car that is driving in front of yours.

It reads the speed with the help of special sensors. If the vehicle in front slows down, your cruise control receives a signal to slow down and vice versa. This innovation is designed to make the trip safer and avoid collisions if possible.

Adaptive cruise control is radar and laser. Radar is considered more accurate, but at the same time more expensive. Laser, on the other hand, is considered less reliable - adverse weather conditions can affect its operation. Adaptive depends entirely on the correct functioning of two systems: and security - ESP.

If they work properly, the mechanism also functions. However, if at least one of the systems fails, the adaptive cruise control warns the driver about the problem and turns off. If the cruise control does not have time to smoothly reduce speed in front of a sharply braked car, the car will begin to “beep”. So he asks you to take control of the car in your hands.

The system and the cruise control control unit itself are located under the hood of the car or behind the dashboard. This is a small computer that is connected to a throttle and special sensors. If you have a quality mechanism in your car, it will keep the speed of the car unchanged even when driving on a hilly road, despite the mass of the car.

How to set the necessary and constant speed of movement?

Usually the speed is adjusted by pressing the button, increasing or decreasing by 2 km/h. Such a mechanism may not be very convenient, but it protects the driver from a sharp increase or decrease in speed. In addition, the cruise control system automatically deactivates in the event of heavy braking for even greater safety.

Cruise control is not just one button, there are usually five. With one button you turn on the cruise control - the word Cruise on the odometer lights up. The second is for shutting down the system. There is also a button to set the speed you need. Now you can take your foot off the gas pedal, the car will drive at a constant set speed.

To temporarily turn off the device, slow down or press the cancel button. Cruise control will turn off, but save the parameters you entered in its system. Until you turn off the ignition or the cruise control itself, the speed you set will be stored in the device's memory. To restore it, click the corresponding button. As you can see, there is nothing complicated in the cruise control control system.

How does acceleration or deceleration occur when cruise control is operating?

If you need to overtake a vehicle in front, simply step on the gas pedal, once overtaking is complete, take your foot off the accelerator and the vehicle will return to the set speed. You can decrease the movement speed by several points by pressing the Coast button several times.

Cruise control is usually installed in cars with automatic transmission. However, the existence of the device is also possible in "mechanics". That's just in cars with a manual gearbox cruise is special.

If the owner of the “machine” turned on the cruise control, took his foot off the gas pedal and enjoys the ride, and the car itself regulates the speed even when overtaking or an obstacle appears on the road, then the owner of the “mechanics” needs to depress the clutch when shifting gears, the cruise, respectively, turns off, and then turn it on again. Other differences in the interaction of cruise control with different types of car gearboxes have not yet been identified.

If your vehicle is in rough terrain with long and frequent ups and downs, your car speed will likely increase on downhill and decrease on uphill, even with cruise control on. In this case, it is better to temporarily turn off the cruise control function and return to this option already on a flat section of the road.

In any case, cruise is a useful option and does a great job of maintaining a constant, set speed on the highway. And which type of mechanism you choose is up to you. Installing cruise control, if you have not done this before, is better with the help of craftsmen at a service station. So buy yourself this mechanism and enjoy a comfortable ride.

Cruise control is a special device in a car that allows you to maintain a constant speed while driving by adding speed during natural deceleration (uphill) or reducing the gas supply when descending. The system is needed on long trips, when intense attention is required from the driver. For the cruise control to work effectively, so that the driver can feel it, large sections of the road with good coverage are needed. Naturally, the cruise control system is most in demand in countries such as the United States, where there are good long roads.

How sad it is to realize, it turns out that good roads can be even where there are no large settlements

Many drivers who have bought a used foreign car (even a very expensive and luxurious one) sometimes do not know about the full functionality of their car. This can be explained by the fact that to drive a car it is enough to study its main characteristics, or by the fact that the documents (passport or description) for the car are not complete or even lost.

Most often, the keyboard device built into the steering wheel of a car is completely or partially ignored after unsuccessful attempts to turn it on.

Many owners of foreign cars still cannot understand why the CRUISE button on the steering wheel is needed

Today's cruise control systems are divided into passive and adaptive.

Passive systems

The passive cruise control system includes the following elements:

system control keys;
automatic control controller;
servo;
solenoid valves for servo control;
throttle actuator.

How cruise control works

The servo uses the vacuum generated in the collector of a running engine. The controller, depending on the difference between the signals about the real and the set speed, controls the vacuum and ventilation valves of the servo drive according to the programmed program. The signal from the servo membrane goes to throttle control, adjusting the fuel supply. In this way, a constant (set) speed of the machine is maintained when the load on the engine changes (ascent, descent).

On such a road, where the descent is constantly replaced by an ascent, it is better to drive with the cruise control on, otherwise you will constantly have to press and release the gas pedal

The controller is programmed in such a way that the cruise control system cannot be forced on if the vehicle speed is less than 40 km/h. On the other hand, the controller automatically turns off when the driver presses the brake pedal.

Cruise control

As a rule, the control keys are located on the multifunction lever or in the center of the steering wheel, in some models on the front panel, usually signed CRUISE.

cruise control

OFF key - off.
ON key - turn on the cruise control controller. When this key is pressed, the system itself is activated, but to set the desired speed value, you need to dial the required speed by pressing the accelerator, for example 60 km / h, and press and release the SET button. From this point on, the vehicle will maintain the set speed under the control of the controller, the CRUISE ENGAGED indicator will light up.
To accelerate the vehicle with the cruise control activated (the ON button was pressed), the RES + (RESUME/ACCELERATE (R/A)) button (switch) must be pressed. A short press (half a second) will result in a minimum speed increase of 1.6 km/h. If you press (hold the switch) RES + during acceleration to the desired speed, the controller will remember exactly the value that was reached at the moment the button (switch) was released.
A short press of the SET button with the cruise control activated (the ON button was pressed) will reduce the speed by 1.6 km / h, and a long press of the button will make it possible to reduce the speed to the desired one.
When overtaking, you need to press the gas pedal (increase the speed of the car), after completing the maneuver, you need to release the gas pedal. The controller will reduce the speed to the value before overtaking, and the vehicle speed will again be constant.
You can disable cruise control either by pressing the brake pedal, then the system will not remember the set speed, or by pressing the OFF button, the next time the system is activated without turning off the car, the system will pick up and maintain the previously set speed.

When the cruise control system is on, you do not need to “push on the gas” - you can take your foot off the gas pedal. You can also set the speed limit to 90 km/h and sometimes increase it.

terms of Use

In conditions of frequent descents and ascents, some difficulties may be observed when driving with the cruise control system activated. It depends on a combination of three factors: the steepness of the road, the set speed and the steepness of the descent (ascent). When climbing, a loss of speed is possible, while on a steep descent, engine braking may not be enough, you will need to press the brake pedal. This inevitably results in drivers disabling the cruise control system under such variable conditions.

WARNING!!!

It is strictly forbidden to turn on the cruise control system when the road is icy, wet and slippery. This could lead to an accident.
In difficult road conditions (fog, night, rain, snow, drizzle), cruise control cannot be used.

What is modern adaptive cruise control

Created a more advanced adaptive cruise control system (ACC - Adaptive Cruise Control) allows you to keep the necessary distance between cars at a given speed. The system is equipped with a laser or radar mounted behind the grille. The speed of return of the constant radar signals is scanned by the controller, which either accelerates the car or slows it down. This allows you to set the optimal distance between cars, which contributes to traffic safety.

The adaptive cruise control automatically takes into account the distance to the vehicle in front. The indication is displayed on the instrument panel (click the picture to enlarge)

The adaptive cruise control works like normal once the obstacle is cleared to a safe distance: the previously set speed is restored.

Laser adaptive control systems are much cheaper than radar systems. The disadvantage of laser systems is that in bad weather conditions (rain, snow, spray from cars in front), the laser does not see the obstacle. A dirty car is not perceived by the laser at all.

The radar cruise control system is installed on executive and expensive sports cars.

Many European countries consider the adaptive cruise control system to be the most promising in the automotive industry. The system allows the driver to drive comfortably and improves the safety of all passengers by preventing collisions.

Today's "advanced" adaptive cruise control systems are equipped with audible and visual warnings. And the most modern ones can make independent decisions about emergency braking if the driver slows down or avoids braking.

I would like to warn drivers: adaptive cruise control sometimes makes mistakes, erroneously identifying an obstacle, so the driver must be careful on the road even with such a perfect system.

It should be noted that when the cruise control is on, the engine operation mode is selected, which consumes the least amount of fuel.

Additional information for drivers

Checking the passive cruise control system

If the car does not maintain speed when the cruise control system is activated, you need to make sure that it is working.

Procedure for verification:

Turn on the ignition. Turn on the cruise control ON switch. The CRUISE ENGAGED indicator light should come on. The indicator light may be burned out, if so, it needs to be replaced.
Press the RES+ button (switch) for 3 seconds. The indicator light should turn on for 3 seconds and turn off for 2 seconds. After that, if there is a breakdown, the indicator will display error codes in self-diagnosis mode. If everything is normal, to reset the self-diagnostic mode, you need to accelerate to 16 km / h, turn off the cruise control system by pressing the OFF button and make sure that the indicator goes out.

Error codes read by indicator lamp

When reading, remember that:

there is a long pause between codes;
two-digit codes are separated by a short pause.

Example, code 12: long flash, short pause, two short flashes.

Error code 01
It is necessary to check the wiring going to the main cruise control buttons, inspect the brake light switch, check the cruise control brake pressure sensor is working.

Error code 05
Check fuse and wiring between fuse and cruise control.

Error code 07
Check the cruise control brake sensor and brake light switch.

Error code 11

Error code 12
You need to check the cruise control switch.