What is the function of automotive brake fluid?
2 Answers
Brake fluid primarily functions to transmit energy, dissipate heat, prevent corrosion and rust, as well as provide lubrication. Here are some introductions about brake fluid: 1. Brake fluid is the liquid medium that transmits braking pressure in hydraulic braking systems, used in vehicles equipped with hydraulic braking systems. 2. Brake fluid, known as Brake-Fluid in English, is an indispensable part of the braking system. Within the braking system, it serves as a medium for force transmission. Since liquids cannot be compressed, the pressure output from the master cylinder is directly transmitted to the wheel cylinders through the brake fluid.
The main function of automotive brake fluid is to transmit hydraulic pressure, allowing the force from your foot on the brake pedal to be transferred to the wheels, enabling the brake discs to clamp and stop the vehicle. It needs to withstand high temperatures and absorb moisture to prevent corrosion, as temperatures can soar to several hundred degrees Celsius during braking. If the boiling point is too low or moisture gets in, it can lead to vapor lock, causing brake failure—which is terrifying. I've seen many cases while repairing cars where owners didn't change the fluid on time, resulting in brake fade during long downhill drives and accidents. It also lubricates brake system components and prevents metal corrosion, ensuring smooth operation. Regularly check the fluid level and color, and replace it every two years or as recommended by the manual to avoid risks.