Brake fluid is a vital component of a vehicle's hydraulic braking system. Its primary function is to transfer and amplify the force applied when you press the brake pedal into pressure that activates the brakes, allowing the vehicle to slow down or stop. When you push the brake pedal, this force compresses the brake fluid in the master cylinder, which then travels through brake lines to the brake calipers or wheel cylinders. The pressurized fluid causes the calipers to squeeze the brake pads against the rotors, creating friction that slows the wheels
. Because brake fluid is incompressible, it efficiently transmits force through the braking system, making it possible to stop the car with relatively little effort on the pedal
. Additionally, brake fluid lubricates moving parts within the braking system and helps prevent rust and corrosion by absorbing moisture, which protects components like brake lines and calipers from damage
. In summary, brake fluid:
- Transmits and amplifies the force from the brake pedal to the brakes
- Enables the hydraulic system to function effectively by being incompressible
- Lubricates brake system components
- Absorbs moisture to prevent corrosion and rust
Without brake fluid, the hydraulic braking system would not work, and it would be nearly impossible to stop the vehicle safely
