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Brake fluid is a type of hydraulic fluid used in hydraulic brake and hydraulic clutch applications in automobiles, motorcycles, light trucks, and some bicycles. It is used to transfer force into pressure, and to amplify braking force. It works because liquids are not appreciably compressible.
Most brake fluids used today are glycol-ether based, but mineral oil (Citroën/Rolls-Royce liquide hydraulique minéral (LHM)) and silicone-based (DOT 5) fluids are also available.[1]
The origins of modern braking systems date back to an event more than a century ago - in 1917, Scotsman Malcolm Lockheed patented a hydraulic actuated braking system.[2][3] Initially, vegetable oil was used as a working fluid. But it did not meet the most basic requirements, and in the process of evolution, special brake fluids were created, which consist of a base and a package of additives (thickeners, anti-corrosion additives, colorants).
- ^ "Chapter 7 : Basic Hydraulic System Theory" (PDF). Peterverdone.com. Retrieved 2018-07-06.
- ^ "How the braking system works". www.howacarworks.com. Retrieved 2025-01-28.
- ^ "Braking 101: The System, Physics and Science of the Motion Management". dsportmag.com. Retrieved 2025-01-28.