For the car brakes to work, kinetic energy is converted into heat via the motion of the wheels which, in the end, bring your vehicle to a stop in a safe way. It’s obvious of the brake discs to heat up during the process but when this heating can be dangerous? Let’s have a detailed look.
Brake Mechanism: Before getting to the discs, we need to understand how brakes actually work. Whenever you press down the brake pedal, brake fluid flows to the callipers and the harder you press, more fluid is applied. This process alone is termed as Hydraulic Force Multiplication.
Brake pads that are positioned on either side of the rotor or the brake discs would squeeze and trap the rotating disc in the centre. Closing of the pads around the rotor slows it down and decelerates the car whereby this action creates a lot of friction resulting in heat which gets the brake discs to gain temperature.
Know that stopping a single tonne vehicle takes a lot of pressure and brake power which is why they should be well maintained else it can cause a serious accident.
Now that we know that a little bit of heat is acceptable and obvious, what would be the maximum temperature in order to keep the brake discs functional safely? For the standard passenger cars, the temperature can easily reach 130 degrees whereas 500 degrees for the track cars. But then, these vehicles are designed to cope with such an extreme temperature.
Frequent and abrupt braking without giving them time to cool down may result in brake fade. Excessive braking results in brake fade which is why keeping them cool is important. There’re different types of brake fade and knowing about each would help you manage accordingly. Let’s have a look!
It’s one of the most common types and occurs when you frequently brake without letting them cool down in the first place. The process emits excessive heat which is damaging to the brake discs as well as car tyres in Egypt.
All you need to do is let the brakes cool off before reapplication but, if you’re already experiencing friction fade, bring the car to a complete stop and let it sit idle for almost an hour before you start moving again.
Brake Fluid Fade
Most of the vehicle manufacturers advice on changing the brake fluid/oil occasionally because if you don’t, it degrades and oxidises by absorbing water. Excess water causes the brake fluid to boil thus generating steam which reduces brake performance or fails completely. Brake fluid must be replaced after every two years, depending on overall vehicle performance.
Replacing Brake Discs
If the brake discs have already been exposed to excessive heat, they might need to be replaced completely. Brake rotors would bend if you don’t let them cool down properly as rotors should have a flat surface to keep in contact with the brake pads at all times. Warped rotor gives your car a sudden jerk each time the brakes are applied.