Braking system in Cars

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Hello, guys today I will tell you how the braking system works in cars and types of brakes available in cars.

What are Brakes?

Brakes are one of the most important components in a vehicle. If you talk about performance it includes good brakes also, because if you go fast you need the same amount of stopping power to reduce that speed.

It is a mechanical device that absorbs energy from a moving system. It is used to slow or stop a moving vehicle, which is mostly accomplished by means of friction.

How Brakes system works?

There are two kinds of brakes Disc Brakes and Drums Brakes. Disc brakes are mounted on front wheels and Drum brakes are mounted on rear wheels. In some modern high-end cars have Disc brakes on all four wheels.

These are the components used in the brakes system:

  • Brake Pedal:

    It is located in the centre of the accelrator and clutch pedal. The brake system is activated only after pressing this pedal.

  • Fluid Reservoir:

    It is the brake fluid or brake oil which is used on the braking system.

  • Fluid Lines:

    These are pipes through which the brake fluid flows in the vehicle.

  • Brake Pads:

    Steel backing plates used in disk brakes. It is usually made of ceramic, metal or other hard-wearing composite materials.

  • Brake Shoes:

    2 pieces of sheet steel welded together that carry the brake lining.

  • Brake Drum:

    It is the rotating drum-shaped component used in drum brakes.

  • Rotor:

    It is a cast-iron brake disc connected to the wheel and/or axle, sometimes made of reinforced carbon-carbon, ceramic matrix or other composites.

  • Brake Lining:

    It is a heat-resistant, soft but tough material with a high friction characteristic housed inside a brake shoe.

  • Piston:

    It is a moving component contained by a cylinder.

  • Calliper:

    A device on which brake pads and pistons are mounted

    • Floating Calipers/Sliding Caliper:  It moves relative to the rotor; uses a piston on a single side of the disc to push inner brake pad into the braking surface before pulling calliper body in to apply pressure on the opposite side of the disc.
    • Fixed Calipers: It does not move relative to the rotor and is sensitive to imperfections; uses one or more single pairs of opposing pistons to clamp from each side of the rotor.
  • Master Cylinder:

    A device that converts the non-hydraulic pressure from your foot into hydraulic pressure and controls slave cylinders at the opposite end of the hydraulic system.

  • Vacuum Booster:

    A component used to enhance the master cylinder and augment pressure from a drivers foot through the use of a vacuum in the engine intake; only effective while vehicles engine is running.

When the driver presses the brake pedal there is a force generated which is boosted by the Vacuum from the engine. This boosting effect causes the brakes to respond more quickly.

This force from the vacuum booster pushes the piston inside the master cylinder against the spring force causing the brake fluid to flow under pressure. This pressurized fluid reaches the brake calliper (Disc Brakes) and brake cylinder(Drum Brakes) via fluid lines.

Disc Brakes

The pressurized fluid enters the brake calliper forcing the brake pads to move inwards against the revolving disc (which is connected to the front wheels). When the brake pads come in contact with the disc, a friction is generated which reduces the speed of the disc which in turn reduces the speed of the vehicle and eventually stopping your vehicle.

Drum Brakes

The pressurized fluid now enters the brake cylinder inside the Drum brakes. There is a piston inside these cylinders, these piston move outwards because of the brake pressurized fluid inside the cylinder. This outward movement of the piston causes the brakes shoes to move towards the rotating drum. When this brake shoes rub against the drum, friction is generated converting the kinetic energy into heat energy and thereby stopping your vehicle.

Types of Brake System

  • Electromagnetic Brake System

    Electromagnetic brakes are getting popular nowadays. It uses an electric motor that is included in the automobile which helps the vehicle come to a stop. It is mostly found in hybrid and electric cars and uses an electric motor to charge the batteries and regenerative brakes.

  • Frictional Brake System

    It is the traditional braking system and commonly found in most of the automobiles. They are service brakes, and typically found in two forms; Pads(Disc) and Shoes(Drums). As the name implies, these brakes use friction to stop the automobile from moving. The pads are located on top of the disc which is rotating with the front wheel, and the shoes are located inside the drum which is rotating with the rear wheel. The pads will close in on the disc and stop the vehicle and the shoes will expand and rub with the drum to stop the vehicle.

  • Hydraulic Brake System

    A hydraulic brake system is composed of a master cylinder that is fed by a reservoir of hydraulic braking fluid. This is connected by an assortment of metal pipes and rubber fittings which are attached to the cylinders of the wheels.  The wheels contain two opposite pistons which are located on the band or drum brakes which pressure to push the pistons apart forcing the brake pads into the cylinders, thus causing the wheel to stop moving.

About Post Author


Hello Guys I am a website developer by profession but is always keen on learning new things. I have been investing in Mutual fund, stock market for the past few years because of which I have gained a good knowledge. I started my entrepreneur journey in 2019 which lead me to learn more things as I am moving forward. I always love to share whatever I learn. Always had a craze for cars from my childhood, which inspired me to start this website.
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