The basic structure of a car (the basic structure of a car is divided into engine structure and chassis structure). The chassis structure is divided into fine gearbox structure, transmission shaft structure, main reducer structure, differential structure and brake structure. 】, automobile electrical structure, automobile gas circuit structure, etc. )
Automobile maintenance [including automobile daily maintenance, automobile engine maintenance, automobile chassis maintenance, automobile electrical equipment maintenance, automobile gas circuit equipment maintenance, automobile tire maintenance, automobile paint maintenance, automobile glass maintenance, etc. ]
Automobile culture [including introducing the glorious history of world famous cars, etc. ]
Automobile driving skills [including normal traffic rules and measures to deal with emergencies while driving. ]
There are many things in it. There are many things in the part I mentioned above that can be written in the paper. For example, stepping on the brakes is a lot of knowledge. From the perspective of automobile driving technology, the timing of stepping on the brakes and releasing the brakes are very important. In addition to braking timing, braking depth is also very important. At this time, we can talk about the control part of the car, the lever principle from the brake pedal to the brake master cylinder, and then the brake master cylinder pumps the oil from the oil cup to the oil pipeline and enters the ABS (Anti-lock Brake System). Some cars even have to go through an EBD (the electronic braking force distribution system automatically distributes the braking force of each wheel by sensing the situation that four wheels touch the ground). Then the oil will go to the brake cylinder, from the oil pipe of the brake cylinder to the piston in the brake cylinder, and then to the brake pad, brake disc, fixing bolt and rim tire (including the selection and replacement conditions of brake oil, how to replace the material of brake pad, the detection and replacement of brake pad, the maintenance of tire rim, etc.). The braking effect can only be achieved by the grip of brake pads and brake discs, as well as the friction and speed of tires on the ground. In fact, the car is a chain reaction built by human imagination, just like playing dominoes. If you give a power, it will have an endless chain reaction until the power disappears (that is, the end of this chain reaction). It is the product of human imagination, creativity and modern science and technology, representing human thinking ability]
Moreover, there are so many kinds of braking systems (this is an auxiliary braking system installed between the main reducer and the transmission shaft, which generates a force opposite to the power of the transmission shaft through a large current to achieve the deceleration effect). Disc brakes include ventilation disc with hub, single piston disc brake, double piston disc brake and four piston disc brake.
Braking alone can talk so much, and it is still a normal basic theory. Then just flip through so many books about cars. I believe your 3,000-word paper is absolutely a piece of cake. There is so much knowledge about cars that just 3000 words can't be finished. The instruction manual of any brand car may be more than 3000 words. My language skills are not very good. Do not laugh at me.