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Vacuum and Power Brakes

Vacuum brakes are one of the oldest braking system exist. It was first introduced and employed on the trains in the mid-1860s. The most simplest way to explain it is that it uses vacuum power to stop the train. These brakes have been improved significantly over the years.

Vacuum or power brakes are used in all most all the railways and modern day cars. It consists of five major components:

1.Break Pedal

2.Intake Manifold


4.Hinge and


How Vacuum brake works?

This system has two chambers, one is always filled with vacuum(first) and other one has either vacuum or atmospheric air(second). Their is a link between two chambers, so vacuum can transfer from first chamber to second.

When we push the break pedals, it opens up the second chamber seal, which allows atmospheric air to enter into the second chamber. This air exerts lot of pressure on the first chamber filled with vacuum which eventually push the brake fluid and stops the vehicle. I am embedding very important video which will help you understand exactly how it works.

This project is good for the case study purpose.I am giving you some helpful links below  :
How power brakes Works ?

How Vacuum brakes Works from African Railways ?

Brake System used in IR 

Railway Technical 

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