What is the primary purpose of brake fluid in a braking system?

The primary purpose of brake fluid in a braking system is to transfer force from the brake pedal to the brake components. When a driver presses the brake pedal, the brake fluid transmits that force through the hydraulic system to engage the brake components, such as the brake pads or shoes. This hydraulic transmission is crucial for effective braking, as it enables the driver to exert force on the brakes without needing to connect directly to each component.

Brake fluid is specially formulated to withstand high pressures and temperatures while maintaining a consistent viscosity to ensure efficient transfer of force. It also serves a secondary role in lubricating the internal components of the braking system and protecting against corrosion. This capability is vital for the safety and reliability of the braking system, as it ensures that braking performance remains effective over time.