95% of the brakes become soft after changing the brake fluid

The quality of the car’s brake system is related to the safety of daily driving. In addition to the brake pads,Brake FluidAlso plays a very important role. Some friends felt that the brakes became soft after changing the brake fluid, and even more exaggerated statistics said that 95% of the brakes became soft after changing the brake fluid. What is going on?

Brake fluid is also known asBrake fluid, Used as the braking force transmission medium in the automobile brake system, because of its incompressibility, can directly transmit the pressure output by the brake master cylinder to the brake cylinder.

In fact, the brake softening after changing the brake oil is due to the fact that air has entered into the oil pipe during the process of changing the brake oil. The brake oil is liquid. The liquid cannot be compressed, but the gas can be compressed. So when there is air in the brake oil pipe , Causing the brakes to become soft.

Although the boiling point of brake fluid is higher than that of water, the brake fluid has been working at high temperature for a long time, The temperature will continue to riseIn addition, brake fluid has a certain degree of water absorption, and it will continuously absorb moisture in the surrounding air during its use. If the brake fluid is used for too long,A lot of bubbles are generated when it is close to the boiling point,Then when braking, the air resistance generated will affect the braking effect, and even cause the direct failure of the brake..