A week ago, after the latest batch of crash test results of China Insurance Research Institute was released, it attracted a lot of attention. Some keyboard car gods are not convinced by the test results of ZhongbaoYan, and the old drivers in the comment area criticize the unreasonableness of the test results with their own "what they have seen and heard".
Let's not say which C-NCAP or C-IASI is more informative, but I believe that the test results they publish are far better than the conclusions reached by the so-called "real collision cases" on the Internet. For example, "the French car test has not won, the actual battle has not lost", "the Japanese skin is not safe", "XX is a road tank", etc., these words are particularly lacking in common sense as soon as they are spoken.
So how can ordinary people not be rhythmic? It is very simple to understand the pictures and videos taken at the crash test site, analyze the changes in different details, and then combine the ratings to judge the safety of the car. If you're really interested in the safety of your car and don't want to trust any third-party agency, this is probably the only way.
As for the 2020 version of the evaluation process of China Insurance Research Institute, as well as the scoring standards, there are already many similar introductions on the Internet, so there will be no repetition here, we will start directly from "understanding photos".
In order to eliminate everyone's doubts about the results of this French car, here I also selected Dongfeng Citroen Tianyi C5 AIRCROSS for analysis.
Dongfeng Citroen Tianyi C5 AIRCROSS
In the results of the R&D of Zhongbao, this picture can be relatively intuitive to understand the actual performance of the model in the crash test. The low rating of the Tianyi C5 AIRCROSS mainly focuses on the "Crash Resistance and Maintenance Economics Index", which is partly a test of the front and rear bumpers and some plastic brackets inside them at low speeds (15km/h), which does not involve important safety results, and I will not expand on them here.
What should I think of a 25% bias collision on the driver's side?
I would like to focus on how to share with you how to look at the collision results of the occupant safety index in the car, the following figure is an external view of the 25% bias collision result on the front of the driver's side, in this perspective, we mainly understand the role of body structure design in passive safety.
Dongfeng Citroen Tianyi C5 AIRCROSS
In this image, I marked 3 key information points with red arrows, from left to right, the energy-absorbing box, the stringer, and the A-column. These three points are important details to observe the front collision, the energy absorber box and the stringer are mainly to deal with the buffer of the force when the frontal collision, if it is a model with the US market as the main sales place, most of them will have a "test-taking structure" for the 25% bias collision on the driver's side, such as shifting the position of the energy box to the sides, so as to maximize the use of the structural safety design of the front. But apparently, the French didn't do that.
The A-pillar determines the safety of the crew compartment, and the hardest steel in the whole car is used for this, which is nothing to say.
From the figure, the Tianyi C5 AIRCROSS was almost compressed to the firewall position in the front of the driver's side 25% bias collision, and the A-pillar has undergone some bending and deformation, which is not a very good phenomenon.
The side view and interior diagram will be more obvious, and the body-in-white intrusion after the occupant compartment is collided is more obvious, which is also the main reason why Tianyi C5 AIRCROSS loses points in the safety of the occupants in the car.
Dongfeng Citroen Tianyi C5 AIRCROSS
However, according to the further dismantling of the China Insurance Research Institute, the fuel and high pressure system of the Tianyi C5 AIRCROSS is intact, that is, the vehicle will not have a fire hazard after a 25% bias collision on the standard driver's side.
So what should the excellent performance be in the driver's side front 25% bias crash test? The picture below is the tank 300 tested with the Tianyi C5 AIRCROSS, which has a occupant safety rating of all "G" (excellent), which is a textbook passive safety performance.
Tank 300
The first is that the A-pillar is incredibly hard, basically devoid of deformation, and the crew compartment is intact. Secondly, the left front body frame collapsed but there was still a compression margin, which shared a lot of the impact for the A-pillar, and even the windshield did not tear.
Tank 300
Then we enter the car perspective, this angle mainly observes the situation of the dummy, on the one hand, whether the airbag is correctly detonated, whether the main airbag is correctly connected to the dummy's head, and on the other hand, it is to see the deformation of other areas of the crew compartment, including the instrument panel.
As can be seen from the figure below, Tianyi C5 AIRCROSS has a lot of problems after the collision. Among them, the greater impact is that the main airbag does not catch the dummy's head at the best angle, which may have three reasons, one is that the process of the airbag detonation is not uniform; the second is that the tightening of the seat belt on the dummy is not enough, resulting in the head being quickly thrown out under the action of inertia; the third is that the steering wheel displacement is caused by the deformation of the center console, which affects the angle of the airbag ejection. Judging from the test results, Tianyi C5 AIRCROSS should belong to the last one.
Dongfeng Citroen Tianyi C5 AIRCROSS
There is also a detail that the area of tianyi C5 AIRCROSS side air curtain is too small, the dummy is subjected to inertia to the left front of the dive during the collision, and the side air curtain does not play a role in stability and assistance, so it causes Tianyi C5 AIRCROSS to lose points in the "restraint system and dummy movement".
Dongfeng Citroen Tianyi C5 AIRCROSS
In addition, from the interior position, it can be seen that the instrument panel has begun to invade the crew compartment space due to the bending of the A-pillar and the deformation of the firewall. But fortunately, the displacement is very small, and in the end, the dummy integrity of Tianyi C5 AIRCROSS is still relatively high, and the "G" is obtained in the subdivision of the damage suffered by the dummy.
To enhance the contrast, let's look at a textbook example. In the interior angle of the tank 300, it can be seen that the A-pillar has almost no deformation, and the spraying of the dummy's face is just in contact with the middle of the airbag, while the side air curtain extends to the A-pillar area, which has a good auxiliary supporting effect on the dummy's head, and it is firmly protected within the scope of the airbag.
Tank 300
After a relatively detailed comparative analysis, I believe that when you see the 25% bias crash test results on the driver's side of your car in the future, you can look at and analyze the test results more rationally.
Understand the results of the side impact
After understanding the frontal collision, let's talk about how to understand the side collision picture. All collisions involving the sides must consider the safety of different passengers in the front and rear rows, for example, on the Dongfeng Citroen Tianyi C5 AIRCROSS, the front and rear rows show different safety performances.
First of all, we evaluate the safety of a car's side collision, mainly through two indicators, one is the distance between the B-pillar and the centerline of the driver's seat, that is, the threat of B-pillar deformation to the head; the other is the damage to the side of the dummy, and the picture is mainly judged by whether the side air curtain accurately catches the dummy's body.
Dongfeng Citroen Tianyi C5 AIRCROSS
Dongfeng Citroen Tianyi C5 AIRCROSS
According to this logic, let's look at the side collision internal view of dongfeng Citroen Tianyi C5 AIRCROSS, the more serious problem in the red box part is that the B-pillar is more obvious to the occupant compartment intrusion. According to a report compiled by the China Insurance Research Institute, this distance is only 12cm. For comparison, the tank 300 is 26cm, more than double that. That is to say, under the same impact force, the B-pillar deformation of dongfeng Citroën Tianyi C5 AIRCROSS is 14cm more than that of the tank 300.
The main problem reflected in the position of the yellow frame is that the head air curtain does not catch the head of the rear dummy at all, because the detonation time is too late. At the same time, dongfeng Citroen Tianyi C5 AIRCROSS front and rear rows have insufficient protection for the legs and pelvic position of members, it should be that the door trim intrusion is more obvious, resulting in squeezing.
Then we look at the performance of the tank 300, which is textbook in terms of the pop-up speed and contact position of the side air curtain. At the same time, the B-pillar became smaller and less threatening to the driver's head, and eventually won the full "G" rating of the item with a performance that exceeded the excellent standard.
Tank 300
Tank 300
Now that we've talked about side impacts, here's how the C-IASI tests roof strength. This test mainly tests the deformation of the roof when the vehicle rolls over and the maximum torque it can withstand, and most riders are likely to pay less attention to this data because they face less of this type of situation.
Tank 300
On the test bench, the robotic arm applies pressure to the roof longitudinal beam until the roof deforms, the windshield is broken, and the occupant compartment begins to be squeezed, and finally the roof withstands what the torque is. However, the test cannot be analyzed and judged by pictures or videos, so it is not too much to expand here, but the data is given for your reference.
In this test, the peak load of Dongfeng Citroen Tianyi C5 AIRCROSS is 53954N, Dongfeng Nissan's new generation X-Trail is 79581N, and GAC Toyota C-HR is 86940N. The tank 300 was 151877N, setting a new record under the new regulations of the China Insurance Research Institute.
Dongfeng Citroen Tianyi C5 AIRCROSS
Master observation
The original intention of the crash test is actually only to measure the comprehensive safety performance of a car from theory, and it is not completely equal to the safety performance of the car on the actual road. Vehicle accidents that occur on the road may have collisions at different angles and different parts, and the models of different manufacturers also have different body-in-white structures, and it is extremely imprecise and unscientific to judge the passive safety performance of vehicles through vehicle damage.
Therefore, do not fall into the network war of words, but also hope that after reading this article, you can go to the official website of the China Insurance Research Institute to find the test materials of your car, and then make your own judgment based on the evaluation results.