1. Pressure Transmission: Brake fluid acts as a hydraulic medium to transmit pressure from the master cylinder to the wheel cylinders or calipers. When you press the brake pedal, the master cylinder compresses the brake fluid, which in turn applies force to the pistons in the wheel cylinders, causing the brake pads to press against the rotors or drums.
2. Incompressibility: Brake fluid is designed to be nearly incompressible, which is crucial for efficient braking. If the fluid was compressible, it would result in a spongy or soft brake pedal, compromising braking performance.
3. Heat Resistance: Brake fluid operates under high temperatures generated by the friction between the brake pads and rotors during braking. It must be resistant to high temperatures and maintain its properties, including viscosity and boiling point, to ensure consistent and reliable braking performance, especially during repeated or heavy braking.
4. Lubrication: Brake fluid also serves as a lubricant for the moving parts of the brake system, such as the pistons and seals in the brake calipers and wheel cylinders. It helps reduce wear and tear, promoting the smooth operation of the braking system.
5. Corrosion Protection: Brake fluid contains additives that protect the metal components of the braking system from corrosion. This is particularly important in areas where roads are treated with salt or other corrosive substances during winter.
6. Low Viscosity: Brake fluid has a low viscosity, allowing it to flow easily through the brake lines and components, ensuring quick response and consistent performance of the braking system.
7. Maintenance and Replacement: Brake fluid absorbs moisture over time, which can affect its boiling point and lead to reduced braking efficiency and potential brake failure. Regular maintenance and replacement of brake fluid, as recommended by the vehicle manufacturer, are crucial to maintain the health and safety of the braking system.
In summary, brake fluid plays a vital role in transmitting pressure, resisting high temperatures, lubricating components, protecting against corrosion, and ensuring overall braking system performance and safety. It requires regular maintenance and replacement to maintain its effectiveness and prevent potential brake problems.
