Why does brake overheating cause brake failure?
2 Answers
Brake overheating can cause brake failure for the following reasons: 1. Overheated brake pads: This occurs due to insufficient clearance or excessive braking, leading to overheating of the brake pads. 2. Brake failure: Overheating can cause the brake pads to burn out, resulting in brake failure. Relevant information about brakes is as follows: 1. Brakes: As the name suggests, they are mechanical braking devices that can slow down the speed of a vehicle, also known as decelerators. 2. The purpose is to decelerate, either to reduce speed or to bring the vehicle to a stop. 3. The principle of braking: It converts the kinetic energy of the vehicle into heat energy, which is dissipated. The kinetic energy comes from the power provided by the engine, which requires fuel combustion to generate the necessary work.
When brake pads overheat, the coefficient of friction drops sharply, just like when something gets too hot and its surface becomes smooth, reducing braking effectiveness. Excessive temperatures can also cause brake fluid to boil and form bubbles. These bubbles have high compressibility in the hydraulic system, preventing brake pressure from reaching the wheels when the pedal is pressed, resulting in a spongy and failing pedal feel. I've seen many vehicles experience this after continuous downhill driving in mountainous areas. The key is to avoid frequent braking: use engine braking or intermittent braking to control speed, opt for high-quality brake pads and brake fluid with a high boiling point, and regular inspections and maintenance can prevent such dangerous situations. In summary, thermal fade is the primary cause, and adjusting driving habits is crucial.
