Why do people always think that cars are heavier and safer?

When someone buys a car, they have to knock, touch, throw a door, and even press a pressure on the body. Then they come to the conclusion that the wagons and steel plates are too thin. This car is not safe. It's definitely a matter of flying... This is especially common at auto shows.

In fact, I really want to say: It's simply too easy and too simple to make the car a little too costless! Why are some cars so heavy? In the past two years, such a set of statistical data shows that the proportion of passenger vehicles using high-quality and high-strength steel in China is only 21%, which is one time lower than the international average and one to three times lower than the European advanced level. Due to the use of steel, domestic self-weighted vehicles are more than 10% higher than the international average and consume 8.13 liters of oil per 100 kilometers. In Europe, they are 6.6 liters. The fuel consumption of domestic passenger cars in China is 23.2% higher than in Europe and higher than Japan. 37.8%.

There are two main reasons for this situation: Light and hard high-strength steels are difficult and costly. The more cars are used, the more expensive they are. This will make those cars that win by price lose their advantages: In order to control the cost of low configuration, high prices, it is easy to be those who pursue the surface of the consumer splattered, which car companies are willing? It's better to put more cheaper steel. It's cheap and heavy, and everyone likes it.

Another reason is that in previous years, the light-duty Japanese cars were too dark, causing consumers to have a sense that Japanese cars are not safe. Japanese cars are not safe because they are too light, so cars that are too light are not Safety!

The heavier the car, the safer it is? First of all, it is clear that the safety of cars we talk about should be the ability of the car to protect people, not to judge the extent of car damage. The aluminum body is so light that you dare to say it is not safe? Automobile lightweighting is an inevitable trend in the global automotive industry. Higher strength materials and lighter bodywork are kings. The biggest benefits of lightweighting are lower fuel consumption, better maneuverability, faster start-up, and shorter braking distances. The heavier the car, the more resistance it brings. For example, acceleration, uphill resistance, and friction are all major factors that determine fuel consumption. This is one of the important reasons why a lot of self-owned miscellaneous vehicles will have a much higher fuel consumption.

Can you get back to the big truck? It is hard to say that the heavier and safer the car is, in fact, right. For example, if a large truck collides with a family car, it is often a large truck that wins. If Newton's law is used to explain, the force is equal to the reaction force. In an ideal state (the body mechanism and the material are the same or similar), the light vehicle has a much greater acceleration, so the impact force will be greater. In some small collisions that do not endanger personal safety, heavy vehicles will be less damaged than lighter ones.

Or I put it another way: "When a car's weight has reached several tens of tons, it can't move at all, so it's safe (like big trucks), but only if the car is very, very heavy. In general, it is a few hundred kilograms, and it can't be completely hit. Car safety is about these things as long as the car's structure is reasonable enough, the material's strength is up to standard, and the light car will be more safe for people's protection.

A safe and reasonable bodywork should be hard in the hard place. The soft place should be soft, not that the car is heavy enough, and the steel plate is hard enough and safe. The hard place, that is, the entire driving cabin, this part should not deform as much as possible in the event of an accident, to prevent foreign objects coming in and causing damage, such as A, B pillar is one of the hardest parts of the car. In addition, the reason why this part is hard enough is that when the vehicle collides with a side collision, there is no buffer zone, so it is only possible to rely on a hard top. Of course, it is best to have side airbags, seat belts, and children must be equipped with additional safety seats.

In addition to the cabin part, in the event of a collision, other parts of the car body must be deformed as much as possible (before and after collision). In this way, the impact ability can be absorbed more rationally, and a certain buffer can be formed, so that the force acting on the body of the vehicle does not exceed the human body's tolerance limit, which is what we often call “defeat energy”. Passive safety is all about situations where accidents have already occurred. However, active safety is also very important, such as the configuration of the vehicle body stabilization system, ABS, and brake assistance. For high-speed running up and floating, in addition to the weight of the car, but also with the aerodynamics, steering system, suspension structure, body weight distribution and so on.

So, after buying a car, you don't care too much about weight, and you don't have to follow safety basically, but you also need to consume more fuel and lose more! However, if you insist on insisting that the car is heavier, the safer it is, then I suggest you buy the two cars! Security is absolutely nothing!