What are the functions of the braking system

Function of the braking system

Miscellaneous - Everything to do with the car | April 27, 2017

The braking system - this is how it works:

The braking system ensures that your car stops as soon as you step on the brake pedal. All well and good, but how does it work? We explain the function of the brake system and tell you which parts it consists of!

The brakes are installed on most of the vehicles on all wheels. From a physical point of view, the brakes convert the kinetic energy that arises when driving into heat through friction. As a result of this friction, your car is then braked and loses speed up to the speed you want. Or your car comes to a complete standstill when you brake.

Two brake circuits

In modern cars, two brake circuits are required for safety reasons. This means that a car has a braking system on both the front and rear axles. Disc brakes are mostly used on the front axle and drum brakes on the rear axle for braking.

These are the parts of the braking system

The braking system in the car consists of many different components. These include the brake pedal, the brake lines, the brake fluid, the master brake cylinder and the brake booster as well as the four brake cylinders on the wheels and the brake pads and brake linings. But the parking brake and the anti-lock braking system are also part of the braking system.

Brake system function

The following happens when braking: When you step on the brake pedal, the brake master cylinder is actuated. It is filled with brake fluid. The master brake cylinder transfers the so-called hydraulic pressure through the brake lines to the four brake cylinders on the wheels. To be on the safe side, this pressure is transmitted crosswise and in two pressure circuits - this ensures that not all brakes fail in the event of damage. And very important: the brakes only work if the brake lines are absolutely airtight.

Brake booster

So that you don't have to press the brakes so hard, a brake booster increases the original brake pressure by up to seven times. Anyone who has ever driven an old car without a brake booster knows how much force you have to put on the brakes without a brake booster in order to brake the vehicle. The brake pressure is then carried from the brake cylinders to the brake discs and brake shoes to the wheels.

The wheel brakes are firmly attached to the wheels of your car. When it comes to wheel brakes, a distinction is made between disc brakes and drum brakes. Most new cars now have disc brakes at the front and rear, while older models usually have drum brakes at the rear and disc brakes at the front.

brake fluid

The brake fluid in the brake lines consists of synthetic or mineral oil. It always remains liquid even at very high and very low temperatures. The brake fluid is not compressible and it does not foam either, otherwise the brakes would not work. The brake fluid should be changed every two years or every 60,000 kilometers.

Function of the disc brake

The disc brake receives the hydraulic pressure from the master brake cylinder via the brake lines. Due to this pressure, the brake pistons of the brake system are extended. The brake pads, which are provided with the brake pads, are pressed against the brake disc. This creates a lot of friction and it is precisely this friction that reduces the speed of the wheel and brakes it. The heat that is generated is enormous. Temperatures of up to 800 degrees can arise during friction.

As soon as you take your foot off the brake pedal again, the hydraulic pressure in your brake system also decreases. This will move the brake piston back a little. The disc brake is now free again and the wheel of your car continues to turn unhindered.

Function of the drum brake

The brake drum is the central component of a drum brake. The brake drum and the brake shoes form what is known as a friction pair. And this friction pair brakes the wheel.

Structure of the brake drum

The brake drum is made of metal (gray cast iron or sheet steel) and has a special alloy. It is integrated into the wheel. The brake drum must be very stable and be able to withstand a lot of heat, because it is exposed to heavy mechanical loads during its work and must absorb high kinetic energy.

As with the disc brake, the braking effect is achieved by stepping on the brake. The brake shoes are pressed from the inside by the wheel cylinder against the brake drum, which is located on the wheel. This causes a delay and the wheel stops. The heat generated during braking is absorbed and dissipated by the brake drum. This process is important because: The higher the temperature, the lower the effect of the friction between the brake drum and the brake shoe lining. The fact that the braking effect diminishes at high temperatures is called "fading" in technical jargon.

Anti-lock braking system function

In modern cars, the braking system is supported by numerous assistance systems. This also includes the anti-lock braking system. It is integrated into the hydraulic braking system. As its name suggests, it prevents the wheels from locking. This is done by specifically reducing the brake pressure on the wheels. Because the wheels are prevented from locking, the vehicle can still be steered by the driver even in the event of emergency braking. In this way, the driver does not lose control of his car.

Handbrake function

The handbrake is a so-called "mechanical parking brake". In the case of newer cars, this term tends to apply again, because in them the handbrake is usually just a small lever switch in the center console. The handbrake prevents a car from rolling away when it is parked. You should therefore always put them on and shift into gear when parking the car. The handbrake usually consists of a simple cable pull. This cable is operated via the handbrake lever. He clamps the brake disc.

Buy parts of the braking system

Whether brake shoes, brake discs, brake lines or brake cylinders - you can find the right brake parts for your car at a reasonable price on our online marketplace! Here at www.teilehaber.de you can order and buy cheap brake parts!

And don't forget: Always buy your brake parts new, never used. You shouldn't skimp on the brakes!