What does adaptive cruise control mean in a car

Adaptive cruise control, also known as active cruise, sets a distance with the vehicle in front, it will automatically keep the distance unchanged, the car in front accelerates and it accelerates, and the car in front decelerates and it will automatically slow down. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Adaptive cruise.

Adaptive cruise control is an intelligent automatic control system, which is developed on the basis of pre-existing cruise control technology. While the vehicle is moving, a distance sensor (radar) mounted on the front of the vehicle continuously scans the road in front of the vehicle, while the wheel speed sensor collects the vehicle speed signal.

When the distance between the vehicle in front and the vehicle in front is too small, the ACC control unit can coordinate with the anti-lock braking system and the engine control system to make the wheels brake properly and reduce the output power of the engine, so that the vehicle and the vehicle in front always maintain a safe distance.

According to the speed of the car in front, judge the cruising speed by yourself, and the car in front accelerates by itself, and vice versa.

A car feature that allows the vehicle's cruise control system to adapt to traffic conditions by adjusting the speed. A radar mounted on the front of the vehicle is used to detect the presence of a slower vehicle in the path in which the vehicle is heading. In the presence of a slower vehicle, the ACC system reduces the speed and controls the clearance or time gap with the vehicle in front.

If the system detects that the vehicle in front is not on the road in front of the vehicle, it will speed up the vehicle and return it to the speed it set earlier. To put it simply, it is on the high speed, and you don't have to control the speed by yourself all the time [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, it can be stabilized at a certain speed [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Adaptive cruise control (ACC) is more intelligent, and can generally enter the cruise at a lower speed, in addition to high-speed road conditions, it can also be applied to urban road conditions, stop-and-go can be.

The car's sensors (radar) send commands to the actuators (throttle, braking, gear) based on the driving status (distance and speed) of the vehicle in front and the vehicle, and then send instructions to the actuators (throttle, braking, gear) to determine whether to accelerate or decelerate, or exit the cruise.

The most basic function of adaptive cruise control is to keep the vehicle longitudinal, and in the event of a collision, the vehicle will alert the driver and intervene with active braking.

Adaptive cruise control, also known as active cruise, is an intelligent automatic control system that includes radar sensors, digital signal processors and control modules.

The driver sets the desired speed, and the system uses low-power radar or infrared beams to detect the distance of about 200m ahead to get the exact position of the vehicle in front, and if it finds that the vehicle in front slows down or detects a new target, the system will send an execution signal to the engine or braking system to reduce the speed and keep a safe driving distance between the vehicle and the vehicle in front.

When there is no car on the road ahead, it accelerates back to the set speed, and the radar system automatically monitors the next target.

At present, the adaptive system that appears in China can only "adaptive braking", and there is still a lot of room for development.

Hello, cruise control you should know what's going on, is to set a speed and keep driving at this speed. The adaptive cruise is to automatically adjust the speed of the car, with the following function, such as you set 120, there is no car in front of it to run at 120, there is a car in front, he runs 90, your car will automatically follow him according to the set distance to run 90, more capricious, to avoid frequent opening like cruise control. [If you have a problem with the car, ask the car master.]

4S shop professional technician, 10 minutes to solve. 】

Hello, adaptive cruise control is an upgrade function of normal cruise control, which can automatically adjust the distance from the vehicle in front. I hope it can help you, I wish you a happy car [If you have any questions about the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

To put it simply, it is adaptive cruise, which will automatically change the cruising speed according to the surrounding environment of the vehicle, and ordinary cruise control is that there is a wall in front, and it will hit it according to the speed you set if you don't step on the brakes. The former can automatically accelerate and decelerate, and use the probe in front to detect the distance from the car in front and automatically brake or accelerate; The latter can only be set artificially, not automatically.

This is more complicated, to put it simply, after turning on the cruise, there is a car in front of the vehicle that is too slow, the vehicle will slow down by itself, and after the car in front of it changes lanes and accelerates, the vehicle will speed up to the original speed of the car to cruise [The car has a problem, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

ACC is to set a speed, the car will move in a lane according to the speed you set, if there is an obstacle ahead, the vehicle will automatically slow down, or even stop. If the obstacle in front of you is removed, the vehicle will automatically return to its original speed [If there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

This system is used to reduce the driver's operation intensity at high speeds, as long as the number of kilometers is set, your feet can not step on the accelerator. But it must be placed on the brake pedal at all times. There are also a few kilometers before the off-ramp to close and control the speed.

This system should not be used for novices and those who know how to do it, and improper operation will increase the danger! [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello. In the case of starting the fixed speed, it can also automatically adjust the distance of the car [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Set a speed, automatically control the throttle, and maintain a constant speed to travel.

Many car owners are not very clear about the meaning of car adaptive cruise, this car adaptive cruise is an upgraded version of cruise control. Car adaptive cruise, the vehicle travels within a certain speed, not a fixed speed. Adaptive cruise control automatically adjusts the speed of the vehicle in front of you accordingly.

The car adaptive cruise can scan the traffic situation around the vehicle, so as to judge the specific driving speed of the vehicle, so as to assist the driver in driving. Adaptive cruise control allows the vehicle to keep a safe distance from the surrounding cars.

To put it simply, the car adaptive cruise will use low-power radar or infrared beams to detect the distance ahead, which is generally about 200m. After the car adaptive cruise is activated, the exact position of the vehicle in front can be obtained, so that it can be detected that the vehicle in front is slowing down or detecting a new target. After monitoring, the car's adaptive cruise system will send an execution signal to the braking system or the starting system to reduce the speed of the vehicle, so that it can maintain a safe and balanced driving distance with the car in front.

Adaptive cruise system (ACC) can also be called active cruise, is an intelligent automatic control system, adaptive cruise system instead of the driver to control the speed, to avoid frequent cancellation and set cruise control, so that the cruise system is suitable for more road conditions, and the driver can completely remove the foot from the pedal, as long as the focus on the steering wheel Sun Zhizhou, can greatly reduce the fatigue caused by long-distance driving, for the driver to provide a more relaxed way of driving.

Adaptive cruise control generally only works when the speed is greater than 25 km h, and when the speed is reduced to less than 25 km h, the driver needs to manually control it. Through the upgrade of the system software, the adaptive cruise control system can realize the function of "parking and starting" to deal with the disadvantages of the adaptive cruise system when driving in the city with frequent stopping and selling cars and starting situations

1. Each person's driving habits are different, when ACC is used at high speed, due to different circumstances, the sensitivity will be different, and the driving safety may be affected when the radar is dirty, and there may be discomfort when accelerating and decelerating, and the fuel consumption will increase in an instant;

2. When driving fast to overtake the vehicle in the next lane, if the vehicle in front suddenly changes lanes, the adaptive cruise may not be able to react and crash into it;

3. The actual operation of the adaptive cruise system is relatively complex, the learning cost is high, and it is easy for the driver to reduce his vigilance, and the reaction time will be extended if the foot is not in the pedal position.

Whether it is cruise control or adaptive cruise, as an intelligent driving assistance technology, will be the direction of future car development, just like unmanned driving, but the machine is always a machine, and can not completely replace the role of people in the car.

Photo by Pacific Automobile Network Q&A).

Adaptive cruise control is based on the control of speed of cruise control, and it is a step forward to achieve the grasp of distance. It integrates the vehicle's camera, radar and ultrasonic system, and coordinates the action with the ABS system and the engine control system through the ACC control unit, so that the wheels brake appropriately, and the output power of the engine decreases, so that the vehicle and the vehicle in front always maintain a safe distance, which can make the car respond faster than the driver.

1. What does adaptive cruise meanAdaptive cruise control is based on the control of speed based on constant speed cruise, and further realizes the grasp of distance. It integrates the vehicle's camera, radar and ultrasonic system, and coordinates the action with the ABS system and the engine control system through the ACC control unit, so that the wheels brake appropriately, and the output power of the engine decreases, so that the vehicle and the vehicle in front always maintain a safe distance, which can make the car respond faster than the driver.

To put it simply, cruise control only does one thing, that is, to meet the driver's preset speed requirements, and adaptive cruise control not only achieves the preset speed, but also shoulders the task of maintaining the preset following distance and automatically accelerating and decelerating as the distance changes. In a sense, this system is indispensable if you want to realize intelligent autonomous driving.

In addition to the cruise control function, it also obtains the road information ahead, and based on the distance from the car in front and the relative speed of the shield, it controls the throttle opening and braking torque of the car, adjusts its longitudinal speed, and makes it drive at an appropriate safety distance relative to the car in front. The adoption of this system is of great significance for improving the safety, comfort and energy saving of automobile driving, reducing the workload of drivers, and improving the traffic capacity of roads.

Second, adaptive cruise theory adaptive cruise signal control unit is the "brain" of adaptive cruise system, in the signal control unit of adaptive cruise system, how to construct the control algorithm of adaptive cruise system, adjust the throttle opening angle and brake pressure, etc., so that the vehicle according to the spacing in the lower control of the adaptive cruise system, mainly realize the switching logic of the actuator and the control algorithm of each actuator. For the design of switching logic of different actuators, at present, the threshold switching principle is mainly adopted: when the expected acceleration calculated by the upper-level control algorithm is greater than the given threshold, the adaptive cruise adopts throttle drive control, and vice versa.

3. The principle of adaptive cruise in the practical application of adaptive cruise system mainly includes five typical traffic scenarios: cruise control, constant speed following, lane change insertion and departure, and emergency braking.

Photo by Pacific Automobile Network Q&A).