ACC is a necessary configuration for high-end models in our current automotive market. Whether you use it or not, but as long as it is available, the car will appear to be a little taller, and it does make us more convenient and easier to drive, but do you know? ACC adaptive cruise or the so-called L2 automatic driving, if used improperly, every minute will cause greater safety hazards. I have talked about the issue of L2 autonomous driving before. Why do you bring it up again?
Because each manufacturer currently on the market has developed its own ACC adaptive cruise system, but there is no specific introduction to the standard of the ACC system and the actual use of the standard, so consumers only know that this system is convenient, intelligent, and can alleviate Driving fatigue. In fact, the ACC systems of various manufacturers are different and require a lot of precautions to use, so I will talk about some ACC adaptive cruise and lane assist experience through most of the ACC systems on the market that I test drive.
1. Understand the working conditions of ACC and lane assistance
The ACC adaptive cruise system and lane assist system of different car manufacturers have different working conditions. First of all, let’s talk about the different working conditions of ACC. The early ACC adaptive cruise in the early years of the past few years is actually very bound to the cruise control system. It’s tight, so its working conditions are the same as cruise control, generally 60-120 kilometers will take effect, and some are 30-160km/h, and up to now, some models can achieve full speeds of 0-120km or more. Adapt to cruising to achieve the effect of completely liberating the feet.
In addition, ACC is also divided into two types: follow-up and follow-up. Followers are cruise-tracking, and follow the trajectory of the preceding vehicle. This is not very dependent on the lane, and is better for road sections with fewer vehicles. a lot of.
However, those who follow the line only recognize the lane. If there is a car ahead, it will travel at the speed of the vehicle ahead. If there is no car ahead, it will travel at the set maximum cruising speed, which is more suitable for long, straight and high speeds.
The working conditions of lane assist are more complicated. In the test-driving models, some are activated at speeds above 40, and some are activated at speeds above 60. In addition, there are also requirements for cornering angles. Lane assist will also exceed the working range if the curve is too large. Therefore, almost all lane assists in the country are currently limited to assist.
2. Several important usage issues
1. Disappearance of lanes and wrong recognition
After all, the on-board computer is not like a human brain and has no ability to think. Therefore, once some brand lane assists drive to a place where the lanes disappear, or in the situation where three lanes change to four lanes in the city, it will immediately detect a lane. Then the steering intervention is carried out, and at this time, an emergency situation of speeding up the steering is prone to occur, which is very dangerous for personal experience.
2. Not early warning of vehicles in front of the line
This problem mostly exists in cars that follow the line. In many cars that have been tested, as long as the vehicle in front suddenly pulls out of the lane, the vehicle will automatically accelerate to the top speed. At this time, if a vehicle suddenly appears and moves ahead, The vehicle is still in the process of accelerating, and most of the vehicle body cannot be detected without entering the line, and there is a risk of collision.
3. The active brake nodes of cruise are different
In fact, in the early non-full-speed cruise system, some of the active braking of the vehicle only played an early warning role, but could not stop completely. This is a problem. The second is that the manufacturer will intervene in the control of the node of the brake is very different. Some brakes are braked with the speed of the vehicle in front, which is relatively gentle and safe, and some require a little reaction time to make the driver feel that the vehicle has been unable to brake, and then suddenly give a sudden brake. The cars are not good.
3. How to use it correctly?
Looking at all the current L2 driving composed of adaptive cruise and lane assist, the level of ACC adaptive cruise and lane assist in the market is still uneven, and consumers’ understanding of them is limited to whether they have it or not. Good, but the specific performance remains to be discussed. If a poor adaptive cruise is used improperly, it is just a fiction.
The first thing to be positioned is that most of the current domestic ACC adaptive cruise and lane assist systems can only be used as auxiliary systems, only auxiliary systems, so more than half of the energy is still on driving, and the hands cannot be completely separated from the steering wheel for too long. , Always wait for intervention in driving.
Then there are several situations that require special attention during driving, including the sudden change of lanes and disappearance of the vehicle in front, the disappearance or change of lane lines, the sudden braking of the vehicle in front, and the excessively large corners. , Don’t trust and rely on the system too much.
Summarize
We all know that with the development of technology, the active safety system of vehicles is indeed constantly improving and perfecting. However, after trying so many vehicles, we have come to the conclusion that it is still not enough to make us fully trust. Therefore, for your own safety, use an active safety system, please pay attention to the above problems, and selectively rely on it.
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