How the braking system works – it is important knowledge for each driver. Because the braking system is one of the most chief and it influences on safe drive. The safe of driver and passengers depends on braking system work.
All modern cars equipped brakes on all four wheels. Braking system of the modern cars uses hydraulic system operating. There are next types of brakes: disc type or drum type.
The front brakes are considered more important than the rear because the car throws the weight forward to the front wheels during the braking. Based on this, many cars are mounted more efficient disc brakes at the front wheels. The drum brakes generally use at the rear wheels. Notably, some expensive cars use all-disc braking system both in the front and in the rear.
How hydraulics brakes work
Hydraulic brake is the main type of drive in the service brake system. A hydraulic brake system works by sending a fluid through hydraulic brake circuit through master and slave cylinders. These cylinders are connected by brake pipes. When driver pushes the brake pedal, it depresses a stock and piston in the master cylinder. The fluid is forcing along the brake pipe. The fluid goes to wheels` slave cylinders. Slave cylinders are filling, and fluid pressure forcing pistons out to apply the brakes. There are practices to use twin hydraulic circuits, in case one should fail.
Hydraulic brake system consists of:
- brake pedal;
- brake booster;
- brake master cylinder;
- wheel cylinders (slave cylinders);
- brake pipelines.
The brake pedal transfers force from the driver’s foot to the brake master cylinder.
The brake booster creates additional force transmitted from the brake pedal. The most popular is vacuum brake booster.
Brake system operation
Operation of the brake system is considered on the example of a hydraulic working system. When you press the brake pedal, the pressure is transferred to the amplifier, which creates additional force on the brake master cylinder.
The piston of the brake master cylinder pumps fluid through brake pipelines to the slave cylinders. Brake actuator pressure is increasing. Slave cylinder pistons move brake pads to discs (drums).
Further pressing the pedal increases the fluid pressure and the brake mechanisms are activated, which slows down the rotation of the wheels and manifests braking forces at the point of contact of the tires with the road. Braking of the wheels is accordance force applied to the pedal. The fluid pressure during braking can be 10-15 MPa.
When the driver releases the pedal: the pedal returns to its original position under the pressure of a return spring. The master cylinder piston also returns to its place. The springs take the pads away from the discs or drums. Brake fluid goes from the slave cylinders to the brake master cylinder through the pipelines. The pressure in the brake system is down.