[Daily Car Maintenance] What are the holes in the brake discs of cars used for?
AnnaMackintosh 
6 Hello everyone, this is a column focusing on car repair and maintenance. There are car mysteries you don’t know, and it will teach you how to avoid the big pits on the road of car ownership. I believe that not only you but also many people have a certain sense of obscurity about the car aftermarket, which will help you uncover the unknown stories of car repair and maintenance.
There is so much knowledge about cars that the editor wants to share them with you. Recently, many netizens have left messages to the editor, wondering what the hole in the brake disc is for.
In this issue, the editor will take you to understand: what is the use of the holes in the car brakes?
Where are the holes in the brake disc usually?
In this issue, the editor will take you to understand: what is the use of the holes in the car brakes?
Where are the holes in the brake disc usually?
It is believed that many car owners will find that there are a large number of holes in the brake disc when they are maintaining or repairing their cars.
These holes usually appear in the middle of the interlayer of the brake disc.
These holes usually appear in the middle of the interlayer of the brake disc.
There are also some individual models with holes designed on the surface of the brake disc. This kind of car is generally a sports car or a high-performance car, and the price is generally more expensive.
The real function of the hole in the second brake disc is to cool down!
The temperature of the brake system is extremely high when it is working.
This is the working profile of the brake sub-pump.
When the driver hits the brakes, the braking force from the brake pumps on the left and right sides will squeeze the brake pads and brake discs, using this strong friction to change the car from dynamic to static. Because of the great friction, the brake disc will heat up quickly.
When the driver hits the brakes, the braking force from the brake pumps on the left and right sides will squeeze the brake pads and brake discs, using this strong friction to change the car from dynamic to static. Because of the great friction, the brake disc will heat up quickly.
So how high can the rising temperature be? See this red disc in front of you? this is after the car hit the brakes at high speed, the instantaneous high temperature has already burned the brake disc, and the temperature is about a few hundred degrees higher now.
2 what the high temperature really affects is the brake oil
The red-hot brake disc is only an appearance. After all, the melting point of iron is as high as 1500 °C. it is difficult to reach this temperature by brake friction. In fact, it is brake oil that is really afraid of high temperatures.
Almost all brake oil barrels are marked with the boiling point of the brake oil. Manufacturers are so concerned about boiling point, there must be a reason behind it. Whether it is brake oil or soybean oil or even plain boiled water, bubbles will be produced as long as it boils. The brake line is closed, and bubbles will be produced once the high temperature reaches the boiling point. When you hit the brakes, the bubbles in these brake lines will be compressed, and the braking force that really reaches the brake disc will be greatly reduced, which is a major reason for brake failure.
Three methods to reduce the temperature of brake disc
Three methods to reduce the temperature of brake disc
Therefore, reducing the brake disc temperature has naturally become an inevitable problem to be solved. after all, the high temperature of the brake disc affects not only the vehicle failure rate on the one hand, but also the safety of the car.
In order to further reduce the temperature of the brake disc, some manufacturers have also made a marking design on the surface of the brake disc. This kind of brake disc is generally used in the field of racing and some sports cars.
There are also some models that make the brakes in a variety of shapes, and the purpose is the same, in order to reduce the temperature of the brakes!
Perhaps you will never expect that there is so much knowledge behind a seemingly simple design. To tell you the truth, when the editor learned here, he was really shocked. The car is a product of mutual integration, and almost all the designs are linked together.
Perhaps you will never expect that there is so much knowledge behind a seemingly simple design. To tell you the truth, when the editor learned here, he was really shocked. The car is a product of mutual integration, and almost all the designs are linked together.
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