Understanding the need for automotive brake is not a difficult concept and I'm sure we can all conjure eerie, frightening picture of what might happen if our car had no brakes, or even worse, if your brakes failed when we least expected. Most of us, however, have limited understanding of what happens when we step on the brake pedal, and therefore, we are still clueless about what our mechanic said when he tells us to be our rotors turning - or worse, that they must to be replaced. In this article, we will take a simplified look at parts of your car's brake system and how it all works.
First, we'll look at the brake pedal. This is the mechanical part of the system. Sam, obviously, as a small appliance made of metal and rubber could not stop a speeding car just pushed a few inches. This pedal, however, is only a small part of a larger picture. Underneath the car, the brake hydraulic system that given a lot more power and speed of the mechanical system can deliver. Hydraulic systems rely on the incompressible fluid, usually oil of some kind. In this case, this oil is known as brake fluid. So, now we can begin to imagine what happens - you step on the brake pedal, which moves lever that is associated with excessive "plunger" (aka piston mechanic language) which starts by pressing the brake fluid. It happens in a place called the master cylinder. Obviously, because the pressure piston can squish and flatten brake fluid, it must go somewhere. It's somewhere that travel through the brake lines under your car to your wheel.
before we go any further, let's talk about the types of brakes that exist in modern cars. Your car can have disc brakes, drum brakes, or a combination of the two. Most cars have disc brakes front and any disks or drums in the rear. To determine what type of brakes your car is, just look between your wheel spokes. If you see a smooth, flat surface to be something great, you have disc brakes. Disc brakes are a flat plate which rotates with the wheel. When you brake, "hand" (aka the caliper brake pad) squeezes one of spinning disc (rotor), causing it to slow down or stop spinning.
can imagine this as a Frisbee flying through the air and hands reaching and grabbing. Drum brakes have a different make up. drum is shaped like a bowl that spins the wheel. Nesting within the vessel, but not touching, the brake shoes. When you step on the brake pedal, brake shoes to respond by pressing on the outside who come in contact with the sides of the bowl, or drum. friction arising from these shoes pressing against the spinning drum and cause the drum to stop spinning wheel and, therefore, to stop the car.
Well now, that we step on the brake pedal, master cylinder piston in the brake fluid is pushed through pipes to the four corners of your vehicle. If you have disc brakes, which brake fluid is forced from the master cylinder and still has to go somewhere, so it pushes against the two piston caliper brakes, causing brake pads to be squeezed in relation to the rotor - remember the hand grasping the concept of Frisbee.
The process is very similar to the drum brakes. brake fluid which has traveled to those units entering the wheel brake cylinder, forcing the shoes to be pushed against the drum. friction stops the drum again, and the wheel to stop spinning. After releasing the brake pedal, brake fluid is no longer pushed from the master cylinder, brake lines down, and against the pads or shoes, which allows you to stop and rub the wheel back.
As you can see, this is a complex system with many parts that may suffer damage and wear. Now that you have the basic terminology and knowledge, we can start talking about maintenance and repairs that need to happen to your car safe and functional. Take a look at the following article in my series, titled "Brakes - When things go wrong or wear ."
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