now,carHas become one of our indispensable means of transportation, but for most consumers, they do not understand the relevant knowledge of the automotive industry, which is bound to have a bad effect in the process of their car purchase, or be affected by the car. The manufacturer has been deceived. What kind of knowledge needs us to study seriously, today, we will learn together which essential car knowledge.
Which car is a hatchback? A sedan?
In our daily life, we often hear the term hatchback and sedan. How are they divided: usually we call the engine room, cab, and trunk of a car the "compartments" of a car, such as these three Each compartment is independent of each other and is called a sedan. If the cab and the luggage compartment are combined, it is called a hatchback.
Body specifications
When buying a car, you need to know the space of a car, of course, you need to look at the car's total length, wheelbase and other parameters. At present, various auto manufacturers have basically unified the specifications of the body, such as the overall length of the body, wheelbase, wheelbase, front suspension, rear suspension, etc. Some parameters such as the overall width and height of the body will be slightly different.
Car passing performance index
When understanding an off-road vehicle (special area), you will often see a series of parameters, such as the maximum gradeability, the maximum roll angle, the minimum ground clearance, and so on. Below we use pictures to visually show the meaning of these parameters.
What is the non-load-bearing body?
A car with a non-load-bearing body, its engine,Transmission systemThe assembly part of the body is fixed on a rigid frame, and the frame is connected to the wheels through front and rear suspension devices.
The non-load-bearing body has a beam that runs through the entire body structure, and the chassis has high strength and good bump resistance. Even if the force on the four wheels of the car is uneven, it is still borne by the frame and will not be transmitted to the body, so the body is not easily twisted and deformed.
The non-load-bearing body is relatively heavy, large in mass, and high in height, and is mostly used on trucks, buses and off-road vehicles. However, because the non-load-bearing body has better stability and safety, some high-end cars are also used.
Load-bearing body
The entire body of a load-bearing body car is integrated, and there is no beam that penetrates the whole. The engine, transmission system, front and rear suspension and other components are all assembled on the body, and the body load is transmitted to the wheels through the suspension device.
Cars with load-bearing bodies run smoothly on flat and straight roads, have low natural frequency, low noise, and light weight, and are widely used in cars. Of course, the strength of the chassis is not as strong as a non-load-bearing body with a beam structure. When the four wheels of the car are not evenly stressed, the body will deform.
Different materials for the body
Not all the materials of the body are as strong as possible, it depends on where they are used. For example, the frame of the cab (such as beams, longitudinal beams, ABC columns, etc.), in order to prevent the cab space from being deformed as much as possible (to ensure the safety of the drivers and passengers), high-strength materials must be used. For example, the front and rear materials (such as engine cover, fender, etc.), in order to be able to absorb the impact force, relatively low-strength materials can be used.
What is the role of the door anti-collision beam?
The door anti-collision beam is the most important line of defense to reduce the side impact of drivers and passengers. Because there is not too much space between the driver's body and the door as a buffer when subjected to a side impact (different frontal impacts, there is still a certain space in front of the driver and occupant as a buffer), and they will be directly affected by external forces. Therefore, the higher the strength of the anti-collision beam, the better the protection for drivers and passengers.
What is body impulse transfer?
It is also to protect the people in the cabin. When the car is hit, the specially designed body is used to disperse and transfer the impact force, thereby reducing the impact force transmitted to the cabin and achieving the purpose of protecting the occupants in the car.
What is collapse energy absorption?
In a car collision, it is important to protect the safety of the occupants, so the smaller the deformation of the cab in a collision, the better. The car is designed with this in mind. When the car collides, a part of the mechanism is first collapsed to absorb part of the impact energy, thereby reducing the impact force transmitted to the cabin.
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