"I just believe in assisted driving too much." This is? One of the car owners, Fan (a pseudonym, hereinafter referred to as Mr. Fan), accepted the first sentence of Che Jujun's interview.
1. What happened?
On the evening of September 22nd, Mr. Fan drove a white Li ONE back to Qingdao on G 18 Expressway. Near Pingdu city, he turned on the "assisted driving" function, and the speed was about120km/h.
The driving recorder shows that at around 22: 00, a van on the right front began to change lanes to the left and gradually entered the inner lane where Mr. Fan was located. However, Li ONE, who is in the "assisted driving" state, shows no signs of slowing down, and still drives at the speed of120km/h/h. ..
When the truck changed lanes to 1/3, the video came to an abrupt end. At this time, the distance between the two cars is only two or three meters.
According to Mr. Fan, from beginning to end, Li ONE's "assisted driving" system did not give any warning or slow down. When he found a car in front of him, he stepped on the brakes and turned sharply to the left. But the distance was too close, too late, and there was a rear-end collision. Lee's right front car crashed into the left rear of the truck.
Fortunately, after 10 years, he stabilized his direction and did not have a second collision.
Mr. Fan is fine, but his parents in the same car are not so lucky. His mother was sitting in the passenger seat and was hit in the face by broken body parts and glass, resulting in nasal bone fracture and facial trauma. "The doctor said that facial plastic surgery is needed in the future. If the foreign body moves another 5 cm, I don't know what will happen. It is estimated that it is reluctant. "
The old man sitting in the second row had no trauma, but after examination, he found that the cervical spine was damaged. "The doctor said that there is no surgery and only conservative treatment."
After the alarm, the local traffic police gave the opinion that the previous vehicle was fully responsible.
"The behavior of the party XX violates the provisions of the second paragraph of Article 44 of China's Regulations on the Implementation of the Road Traffic Safety Law." If there are more than two motor vehicle lanes in the same direction, the motor vehicles that change lanes shall not affect the normal driving of the motor vehicles driving in the relevant lanes. "
Mr. Fan said that there was no wrangling between the two sides of the accident. The driver of another truck also insured the third party liability insurance of RMB 6.5438+0 million, and the Tianan insurance insured by him has stepped in and started to deal with claims.
The day after the accident, Mr. Fan contacted the ideal salesperson in Qingdao.
"The ideal after-sales attitude is very good, much better than traditional car companies. I arrived in Qingdao from Jinan the night I received the call. I went to the hospital to visit my parents the next day and went to see the car in the afternoon. "
Fan's last car was an entry-level luxury car. After the sale, he mentioned the current Li Yi July 14. Although it has only been driving for more than two months, the mileage has been more than 10 thousand kilometers, which shows that Mr. Fan likes this car very much.
But now, he raised three questions:
Why can't Li ONE's "assisted driving" identify the vehicle in front when it is turned on?
▎ At the time of impact, the relative speed of the two cars is about 30 km/h.. Why is Li ONE's A-pillar so fragile?
▎ Serious collision, why didn't one of the seven airbags in the whole car open, causing serious injuries?
The oral answer given by the ideal employee is:
▎ The recognition time of assisted driving is too short;
▎ Mr. Fan's car hit the tail of the truck and fell into the bottom of the car;
▎ The airbag missed the point.
Che Jujun thinks this reply has some truth, but it can't stand scrutiny.
Second, is there a problem with lateral front recognition? Born!
Look at the assisted driving first. Ideally, the time left for the system was too short, but Che Jujun watched the video at that time, and it took 7 seconds from the right front truck to the rear-end collision.
Frankly speaking, this time is enough for people with normal performance and ADAS system. Che Jujun tried the ADAS system of almost 20 cars, and there was no problem with the distance and speed.
Some ADAS with excellent performance can also brake and avoid in time when the vehicle in front of the side suddenly inserts in a car or even a shorter distance.
Ideally, no matter the insertion distance or suddenness of the preceding vehicle, it is not a challenge.
The real challenge may be: the light is too weak to identify the truck, and it is difficult to identify the front.
Li ONE's assisted driving is mainly based on vision system and radar. The former uses Mobileye? EyeQ4 vision chip adopts 77GHz millimeter wave radar. It can be called the mainstream configuration at present.
However, EyeQ4' s camera * * * has four versions. According to the horizontal perspective, it is divided into 52? And 100? Two versions.
Where 100? The original video output version has night, fault and AEB functions. It can identify the lane, vehicle size, speed and acceleration more accurately. The location of the obstacle. The lane line accuracy is about 10%, and the detection distance can reach 200 meters.
Which version did Li Yi adopt?
You guessed right, Lee ONE eye Q4 adopted a horizontal viewing angle of 52? Version of.
There is an ideal user response: there is a car in front and the brakes are too slow. Staff reply: this is a perception problem, limited by the camera's 52-degree field of view, and it is late to identify vehicles that are quickly inserted sideways.
Finally, the staff also specially reminded users to pay special attention when using it.
In contrast, Che Jujun recently tried the ADAS system of the third generation Haval H6. Coincidentally, it also uses Mobileye? EyeQ4' s vision chip. But its horizontal field of vision is 100? Very easy to use, there is no obstacle to inserting vehicles in front of the side. This is a 65438+ million domestic SUV.
If the model is around 300,000? 3. It uses three forward-looking cameras, and the maximum monitoring distance is 250m, which is much higher than 150m of ONE forward-looking camera in Li One. Besides, what's the model? Two side cameras are also installed on the 3 B pillar, which theoretically increases the monitoring of vehicles in front of the side.
Car models produced by Che Jujun 20 16? S, like Li ONE, only uses a forward-looking camera, but I never remember that I couldn't recognize the slow insertion of a car that far away in the automatic driving state.
Why is 52 ideal? Camera instead of 100? What about yours? Look at this problem with radar.
In the same question and answer activity, a cyclist asked: Why not use angular millimeter wave radar?
The ideal staff did not answer directly, only said that SVA side-looking assistance was realized by ultrasonic radar, while BSD blind spot detection could not be realized by a millimeter-wave radar. Finally, remind everyone that when using lane change assistance, please be sure to observe the surrounding environment subjectively.
In fact, people who eat melons understand the reason: cost considerations.
As we all know, the detection distance, detection accuracy and transmission speed of ultrasonic radar are much lower than those of millimeter-wave radar, and it is generally used for automatic parking. Because of the low cost, there are 12 cars and enterprises. Millimeter wave radar is more suitable for high-speed and long-distance detection, and its cost is relatively high. 1-3 radar is generally used.
Tucki G3 used three millimeter-wave radars, the third-generation Haval used two millimeter-wave radars, and Li ONE only used one millimeter-wave radar. Let's make a simple comparison:
It can be seen that Li ONE's ADAS hardware is relatively simple. Specifically, there is only one front monocular camera with a narrow viewing angle; Millimeter wave radar uses 77GHz, but there is only one. The overall system is not as advanced as the third-generation Haval H6, but it is the most expensive of the three comparison models.
This basically explains why Mr. Fan's Lee ONE ADAS is indifferent to the insertion of the right front truck. Because the basic hardware didn't keep up.
"I just want to tell you that assisted driving is not that good." Fan explained to Che Jujun.
In fact, he is not the first person to find fault with the ideal ADAS.
This is a complaint made by a Beijing user after Li ONE just went on the market for a test drive. He mentioned that cars in adjacent lanes merged into half a body, and the ideal ADAS system did not respond.
This is exactly the same as Mr. Fan's situation. The only difference is that he took the initiative to control the vehicle and there was no accident.
This is the feedback from an ideal user in Hangzhou this year 1 month. He also used ADAS at high speed, and found that the identification of vehicles jumping in line was very slow, and it took more than half of his body to identify them.
Until April this year, this problem still existed in Li Yizhong.
Above, it is a video screenshot of Li ONE user. A car was inserted in the right front, and Li ONE's ADAS system was recognized late. Although there was a brake at last, it was obviously slower than people expected, so that he said, "I need to step on it psychologically."
This is a relatively slow road condition in the city. What if you put it on the expressway and drive at 120km/h?
In July, a user with the ID of "Have an ideal, open an ideal" spoke after driving a 2000-kilometer expressway:
"Li a person has a bigger mistake. If there is no car in front of the tunnel, it will suddenly take the initiative to brake, which happens four times a day. Fortunately, there is no car following too close behind, otherwise it will rear-end the car.
"When cornering at high speed, the ADAS system will misjudge that the car in the next lane is in this lane, and then it will brake down. This has happened twice. I guess it's an algorithm problem. Can OTA solve it? "
This problem is essentially similar to teacher Fan's problem: Li ONE's ADAS has poor recognition ability in low light and poor recognition ability of side cars. This is why the version of EyeQ4 chip is too low.
Li Xiang has long known about similar problems.
Li wants to say publicly that this will improve the problem of horizontal recognition. But this is a hardware problem, how to improve it through OTA?
In fact, the witty ideal (prospective) user has long seen the essence of the problem. I made an APPeal in the ideal app: adding millimeter-wave radar.
But at present, the voice of these users may only be realized on the next ideal new car.
On September 22nd, Ideal announced that the next brand-new model "Ideal X0 1" will adopt NVIDIA? The most powerful chip in the Olin series, with a single chip computing power of 200 per second? At most, it is equivalent to 80 times of cash.
Wang Kai, CTO of ideal, explained that Mobileye's system is not open enough, and Ideal can participate less.
Since we all know that ADAS of ONE has some shortcomings, why not stop exaggerating the publicity to avoid misleading users and the public?
For example, Ideal declared in official website that "it is safer and more convenient to have an automatic assisted driving system as standard".
First of all, in 2020, 10 Euro? When NCAP tests assisted driving, as long as there is the word "automatic" in the manufacturer's promotion, all points will be deducted! Models? 3 because I called my system "Autopilot", and the word "Auto" in the middle was severely criticized by the European Union. In the end, I only got 59.9 points, and ten cars came last.
Secondly, the extensive use of the word "automatic" in publicity without clearly pointing out the limitations of its use will make users think that the ideal "assisted driving" is automatic driving.
This is not an alarmist, please see the picture below:
The ideal user casually sighed with emotion: the airport expressway is thanks to "automatic driving" at this point. This shows that the ideal has caused false inducement to users in reality.
Mr. Fan's credulity to ideal ADAS is not an isolated case, nor is it his fault alone.
The above picture is an ideal description of the official blind spot on the opposite side. If you look closely, it says, "The system covers the blind spots beside and behind the vehicle". Yes, it doesn't say "lateral front" blind spot. This is also the root cause of Mr. Fan's 922 incident.
Usually nothing, who would dig up the ideal word like this, and then get it to express their ADAS powerlessness to the "flank" very euphemistically?
But I don't know, it's just more automated, safer and more convenient.
User @ keys1221_ 985? Weibo's comment: The manufacturers, sales and media who describe assisted driving as autonomous driving are all murderers!
Che Jujun thinks what he said is so right.
Third, the airbag missed the key? A-pillar 1500MPa?
Regarding Mr. Fan's car, why is the A-pillar broken and the seven airbags are not opened? The ideal staff said that they missed the point. So, where is the impact point, that is, the airbag sensor, generally installed?
Airbag sensors are generally installed in the front and middle of the car body, such as the inside of the fender, under the headlight bracket, on both sides of the engine radiator bracket and so on. With the development of technology, some sensors are integrated into airbag ECU, generally located near the console handle.
Che Jujun dialed the ideal 400 number and got the following reply:
Li ONE's airbag sensor is installed in the B-pillar, water tank, cross beam, front side rail and airbag computer.
Judging from the accident scene map, Li ONE's sensor perfectly avoided the impact. Because there is no airbag sensor installed in its fender. As a result, it is impossible to monitor the right front side collision, the airbag and curtain will not open, and the co-pilot passenger will be completely exposed to the side front accident and bear heavy blows.
Even so, if its airbag ECU algorithm is more sensitive, then the abnormal data from the sensors on the nearby B-pillar and beam should also make its side airbag curtain and side airbag pop up, thus reducing personal injury.
Wait, don't worry about this conclusion yet. Let's take a look at the ideal airbag distribution map:
Li Yi has seven airbags/air curtains: ① main driver's airbag, ② main driver's knee airbag, ③ main driver's left airbag, ④ left airbag, ⑤ co-pilot's airbag, ⑦ co-pilot's right airbag and ⑦ right airbag.
It looks quite complete, but have you found a neutral position? There is no air curtain protection on the left front and right front. This place is the main reason for the injury of Mr. Fan's family.
The main reason is that the air curtain on the right side is not long enough, the front end does not extend to the middle of the A-pillar, and it does not form a complete enclosure with the airbag of the co-pilot. Once there is an impact on the right front, it is easy to expose the head of the co-pilot passenger and get injured.
The picture above shows the side air curtain of Volvo XC90. It can be seen that the side air curtain covers the whole side of the car and even extends below the A-pillar, which can completely protect the driver and passenger from side impact.
Therefore, even if the "semi-shaped" side air curtain in Li ONE is opened, it is difficult to give passengers complete protection.
"The wounds of the elderly are mainly caused by the collapse of the iron roof." Mr. Fan told Che Jujun. "There is a triangular wound on the nose, and the doctor said that facial plastic surgery is needed later."
If Li No.1 had a longer air curtain and a more sensitive trigger mechanism, the elderly might not suffer so much. But there is no if in reality, which does not hinder the ideal propaganda of "super five-star safety"-because it is a five-star conclusion drawn according to the standard of C-NCAP, and this standard does not cover the collision of 922.
In other words, the ideal should be an excellent candidate. However, it is not known whether they have applied what they have learned.
In addition, why does the A-pillar of the "super five-star safety" car break?
According to the introduction of ideal customer service, the A-pillar of Li ONE is thermoformed steel with strength as high as 1500MPa. Che Jujun asked: Is this 1500MPa yield strength or tensile strength?
Sure enough, the answer is tensile strength.
As we all know, the tensile strength of steel is generally higher than the yield strength, and the yield strength is more tested in accidents. Marketing enterprises generally like to use tensile strength to improve the safety of steel. After all, it seems that the number is higher, which makes consumers who don't understand feel very powerful.
In the past, Japanese people liked this because their steel strength was generally not as good as that of European and American departments.
The steel yield strength of Volvo XC90 is only 65,438+500 MPa, but a Volvo after-sales person said that he had never seen the A-pillar break into such a Volvo.
According to the owner's description, the relative speed of the two cars was 30km/h at that time. A-pillar is the most important structural part of all manufacturers, and the best steel will be placed here. Che Jujun did not believe that the impact force of 30km/h could completely break the A-pillar of 1500MPa.
Of course, some people can say that the intensity can be very large in special scenes.
So, there is an "ideal paradox":
If the impact force is strong enough, the airbag should bounce off; If the impact force is not strong, then the A-pillar should be kept. But the reality is that Li ONE's airbag did not bounce off and the A-pillar did not survive. Then whether this strength is great or not becomes a mystery.
Similarly, in the ideal case of broken axle, if you say that the vehicle hit the flower bed side-by-side hard enough, resulting in broken axle, then why didn't the airbag open? If you say that the airbag can't be opened because the force is not big enough, then why is the shaft broken?
Generally speaking, we will find a doubt: Li No.1 has security risks ahead.
First of all, it has no side millimeter wave radar and side front camera in active safety, so it can't effectively identify the car in front of the side. Secondly, it has no side airbag sensor, and the side air curtain is not complete enough, which leads to a safety dead angle when a side collision occurs. Thirdly, the yield strength of A-pillar did not reach the advertised 1500Mpa, and a key passive safety barrier was lost.
In this situation, I think of Luo Yonghao's phrase "the best car within 5 million" and think that he is a real crosstalk performer.
Jeju tubercle
Some people say that AEB shouldn't play Mr. Fan's car? In fact, the AEB in Li ONE can only take effect at the speed of 8-80 km/km, and now the customer service says it has been raised to 8-90 km/h.
At the time of the incident, it was about 120km/h, which was beyond the work scope of AEB. In the final analysis, it is still a pot with a low forward-looking monocular camera and a side-free millimeter-wave radar.
The video above shows that even if the speed is within the working range, Li may not be able to stop alone.
Finally, remind riders, including ideal users, that most ADAS systems now have the following blind spots:
A vehicle, especially a truck, that suddenly cuts across;
Vehicles that are stationary or moving slowly forward;
▎ Large vehicles, pedestrians and bicycles cross the road;
▎ When following the car, the car in front suddenly dodged, revealing the car in front;
▎ There are ice cream cones, isolation piers and ribbons in front;
▎ sharp bends, ramps, intersections;
▎ Heavy rain/snow, night, tunnel, unclear logo;
Finally, to sum up with teacher Fan's words: Don't trust assisted driving too much.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.