What is the thermal attenuation of the brake pads?

In fact, people who often walk on mountain roads may experience that the brakes do not decelerate when the brakes reach the bottom, and the brakes feel particularly soft. When this happens, it is called brake thermal decay. If it is not handled in time, it may cause short-term brake failure, which is terrible to think of!

Due to long-term braking, the brake disc (or brake drum) generates high temperature, which reduces the braking force until it disappears completely. Brake thermal decay usually occurs on long slopes, the load on the brakes is heavy, or after a long period of vigorous driving. Braking heat attenuation will cause the loss of braking force and cause terrible consequences.

Brake heat attenuation

The phenomenon of thermal failure is indeed terrible, but it can be predicted in advance, it is not suddenly without brakes. When thermal decay occurs, there is a very linear change in the braking system, which can be felt by the feet or body.

In terms of foot feel, when the brake pedal is stepped on, the braking stroke will be significantly longer, the braking force will be weakened, and this force will become smaller and smaller as the braking temperature rises.

In terms of physical perception, when you brake hard, you won't feel the "feel of hitting the wall at the end of the segment." You can smell a pungent rubber smell when you open the window. The solution is to find a safer place to cool down immediately.

How to reduce the frequency of thermal attenuation

Use the engine to help you brake, use the engine speed to reduce the speed, in short, use a low gear at high speed. ,

For example, when you go down a mountain, the speed is 60 miles, and you are in third or fourth gear. When you make a sharp turn ahead, you should drop to second gear, but don't drop to second gear directly. If you do this, you will feel that the vehicle is being towed by the low speed of the engine. This is the deceleration function of the engine. The automatic transmission type can be shifted from manual to lever downshift. Engine brakes are not the main source of braking force. You still need to brake on mountain roads, but the brakes must be fast! Ruthless! precise! Do not apply the brakes continuously for a long time. If the vehicle speed is controlled, the brake pedal should be released as soon as possible, so that the brake disc can be ventilated and cooled as soon as possible. If the vehicle speed is too fast and the front corner is too fast, you can depress the brake pedal and rotate forward and backward at the same time. This method of operation is called "combined braking", which is also a common method used by some racing drivers.

Control the driving state of the car

To make the car drive in a good state, it is to drive at a constant speed and try not to accelerate or decelerate, and do not run in the direction. Try to keep balance as much as possible to save fuel and effort.

Confident and relaxed attitude

Be careful when driving on mountain roads, but don't turn caution into pressure. Relaxation is important.

At the same time, you have to trust your car, it is not as fragile as you think, the engine cannot be broken, and the car cannot be overturned. The movies are all fake. Generally speaking, a speed of 30 miles can handle all corners.

Daily brake maintenance

You can make the right choice according to the daily traffic conditions.

Don't blindly pursue and replace some cheap online products, such as "perforated and scored brake discs", "carbon ceramic brake pads" and other substandard products. They are not as good as your original factory. Go to a 4S shop or professional repair shop to regularly check the thickness of the brake pads, whether the brake discs are flat, and whether there is air in the brake fluid is the right choice