As can be seen from the pictures on the scene, the pilot directly hit the trunk, the front of the car was completely damaged, the airbag and the side air curtain all popped up, and the A-pillar on the co-pilot side was seriously deformed.
Here, I don't want to dwell too much on the accident itself. After all, the official notice has not yet been issued, so in the end everything will be subject to the official statement. I just want to discuss a question with you, that is, what are the factors that determine the safety of automobiles? Is the more expensive car the safer it is?
The result of the collision has nothing to do with the price of the car. The key is how to fight.
Previously, Passat scored a negative score in the frontal 25% offset crash test in China Insurance Research Institute. Some people think that the 25% bias test is inconsistent with the actual situation in China, and there are too few scenes where the 25% bias test can be used on domestic roads. However, after the accident, netizens said that "this collision perfectly explained the importance of 25% offset collision".
Judging from the accident scene map, the driver of the Lincoln pilot test drive seems to have an instinctive evasive action, but in the end he failed to escape the tree, and finally the collision site was slightly biased towards the co-pilot.
The serious damage to the pilot's car head seems to indicate that the safety of the car body has nothing to do with the expensive car. After all, this is a million-class luxury car and a full-size SUV-with beams-the key depends on how you hit it, in what way, at what angle and at what speed.
For example, this time the pilot hit a small tree trunk with dots in the front of the car, and the situation will of course be very miserable.
Judging from the state of the front of the car, the speed at that time was probably not less than 80km/h (according to the empirical guess, the official standard), the pilot weighed 2825kg, and the five adults in the car weighed more than 3.2 tons. Such a heavy guy hit a tree at such a high speed, and the force on its stress point has far exceeded the field test limit of China Insurance Research Institute (the frontal 25% offset collision speed of China Insurance Research Institute is 64km/h), so the test results of the accident and China Insurance Research Institute are basically not comparable.
In other words, if you drive any car and hit a tree at the speed of 64km/h required by the crash test of China Insurance Research Institute, the result will not be good. However, if you hit the wall at the same speed, or hit some big objects head-on, the damage degree of the front will be greatly reduced because of the large stress area.
Having said that, the author thought of two accidents that happened in Chongqing many years ago. The first one is 20 12 1 1 month, a Porsche Panamera? Turbocharged? S rushed to the sidewalk and ran into a lamppost next to it. Due to the excessive speed, under the action of inertia, Porsche crashed into two lampposts in succession before stopping. As a result, the Porsche Panamera was directly split in half by a pole.
Another incident occurred on 20 16, Chongqing lawn section of Baomao Expressway, in which the body of an Audi A4L was punctured by a roadside guardrail, resulting in the death of the male driver and female passenger in the back row.
Therefore, no matter how expensive the car is, when a collision accident occurs, the key still depends on the collision angle, speed and body weight (the heavier the car, the greater the inertia and the greater the damage). These factors are closely related to the collision result or collision result.
Of course, the safety of the car body depends on the structure of the vehicle itself.
When buying a car, it is important to pay attention to the body structure.
Because of professional reasons, I often participate in the test drive meetings of various models. In the workshop before the test drive meeting, the test drive coach will preach the safety performance and safety configuration of the vehicle, in which the proportion of ultra-high strength steel used in the body is a frequently mentioned detail.
What is ultra-high strength steel? Generally speaking, steels with yield strength greater than 2 10Mpa and tensile strength greater than 270Mpa and less than 700Mpa are called high strength steels in China. Steel with yield strength greater than 550Mpa and tensile strength greater than 700Mpa is called ultra-high strength steel.
However, compared with the technological progress required by the times, "ultra-high-strength steel" is changing. At present, alloy steels with yield strength above 1370MPa and tensile strength above 1620MPa are generally called ultra-high strength steels.
In the promotion of new cars, what we hear most is the ultra-high strength steel whose strength exceeds 1500Mpa or even 1800Mpa. Ultra-high strength steel can not only greatly increase the deformation resistance, improve the energy absorption capacity, expand the elastic strain zone, but also meet the requirements of lightweight, so it has become the mainstream choice of body structural parts.
For example, Jaguar XEL adopts aluminum frame, which not only has high strength, but also ensures the lightweight of the vehicle. Chery Jaguar Land Rover took the lead in introducing aviation-grade riveting and gluing technology to solve the problem of insufficient rigidity of vehicle joints. By combining it with the body structure adhesive, the strength of the body joint is increased by 2 to 3 times.
In addition, the body structure is also the most important thing to ensure vehicle safety.
In general, few people pay attention to the details of the body structure, but when it is really used, you will find that it can really save your life. Therefore, many car companies have spent a long time studying car body safety. For example, the previous loaded car bodies and non-loaded car bodies, as well as the popular cage car body structure, have a very strong energy absorption effect. After a collision accident, most of the impact force will be absorbed by the buffer zone, and the passenger compartment will not be obviously damaged, which can well ensure the safety of passengers.
Among the self-owned brand models, Changan CS75Plus adopts a cage-type safety body structure. The proportion of thermoformed steel and ultra-high strength steel used in the whole vehicle is as high as 38.3%, and the strength of steel is as high as 1.500 MPa. At the same time, the lightweight of the car body is improved, and the high-strength car body also ensures the safety of the members in the car. In addition, the frame is equipped with aluminum alloy front anti-collision beam and foldable directional mechanism, which provides the most solid safety barrier for the members in the car.
Another example is Fox, which also adopts cage-type body reinforcement structure design, and uses a large number of high-strength and ultra-high-strength thermoformed plates to improve the rigidity of the body. The front and rear impact buffer zones and the door anti-collision steel beam all adopt the same reinforced structural design, and the impact buffer zone can evenly distribute the impact force during collision to the whole body, so as to prevent passengers in the passenger zone from being injured by collision.
Therefore, when buying a car, we should not only care about the surface shape, space and configuration, but also care about the body structure, the proportion of ultra-high strength steel, and even look at the technology of key parts of the body to ensure the safety of the vehicle to the greatest extent.
Let's talk about it finally.
Judging from the collision results before Passat or the pilot's accident, the A-pillar has been seriously deformed, which will directly endanger the safety of passengers. The results show that whether the vehicle is expensive or not has little to do with the collision result. The result of the collision is closely related to the structural design, material use and technology level of the car body. In addition, there are factors such as angle, speed and self-weight when colliding, which will also have a great impact on the collision results. Therefore, within our control, when choosing a car, we should not only pay attention to the number of airbags, but also fully understand the design, materials and technology of the key structures of the car (especially the passenger compartment structure) from the sales consultant. Don't assume that the more expensive it is, the safer it is.
More importantly, no matter how safe the vehicle itself is, how strong the structure is, how many airbags and active safety devices are equipped, there are still too many unknowable factors that cannot be controlled (such as the collision speed and angle mentioned above). We must always obey the traffic rules, develop good driving habits, predict in advance what measures should be taken according to the road traffic conditions, and firmly control safety in our own hands.
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This article comes from car home, the author of the car manufacturer, and does not represent car home's position.