Introduction To Brakes and Different Types Of Brake | Function Of Braking System

Introduction To Brake and Different Types Of Brake |
Parts Of Automobile

A brake is a mechanical device which inhibits motion, slowing
or stopping a moving object or preventing its motion.

Main Function Of Braking System:

  1. To stop the vehicle safely in shortest possible distance
    in case of emergency.
  2. To Control the vehicle when it is descending along the
  3. To keep the vehicle in desire position after bringing it
    in complete rest when there is no driver.

Most brakes commonly use friction between two surfaces
pressed together to convert the kinetic energy of the moving
object into heat, though other methods of energy conversion
may be employed. For example regenerative braking converts
much of the energy to electrical energy, which may be stored
for later use. Other methods convert kinetic energy into
potential energy in such stored forms as pressurized air or
pressurized oil. Eddy current brakes use magnetic fields to
convert kinetic energy into electric current in the brake
disc, fin, or rail, which is converted into heat. Still other
braking methods even transform kinetic energy into different
forms, for example by transferring the energy to a rotating

Brakes are generally applied to rotating axles or wheels, but
may also take other forms such as the surface of a moving
fluid (flaps deployed into water or air). Some vehicles use a
combination of braking mechanisms, such as drag racing cars
with both wheel brakes and a parachute, or airplanes with
both wheel brakes and drag flaps raised into the air during

Disc and Drum Brake
Examples Of Brakes


The brakes for
automotive use may be classified according the following


Based on the above considerations, brakes are classified
with respect to following factors.

1. With respect to application,

a. Foot brake i.e. Service Brake

b. Hand brake i.e. Parking Brake

2. With respect to the number of wheels,
a. Two wheel brakes
b. Four wheel brakes

3. With respect to the method of braking contact
a. Internal expanding brakes
b. External contracting brakes

4. With respect to the method of applying the braking

a. Single acting brake
b. Double acting brakes.

5. With respect to the brake gear,
a. Mechanical brake
b. Power brakes

6. With respect to the nature of power employed
a. Vacuum brake
b. Air brake
c. Hydraulic brake
d. Hydrostatic brake
e. Electric brake

7. With respect to power transmission,
a. Direct acting brakes
b. Geared brakes

8. With respect to power unit,
a. Cylinder brakes
b. Diaphragm brake