Air Brake System Power Point 2z6j3e

CONTENTS  What is an air brake system?  Components of air brake system.

 Working of Air brake system  Brake assembly  Advantages  Limitations  Applications  Conclusion

AIR BRAKE SYSTEM An air brake system uses compressed air to apply the brakes. Air under pressure can be conveniently stored and carried through lines or tubes.

The Components of an Air Brake System.

A basic air brake system capable of stopping a vehicle has the following components:  A compressor.  A Reservoir.

 A Foot valve.  Brake chambers and slack adjusters.

 Brake linings and drums.

 Reservoir

 Brake chamber  Actuator  Dual brake valve  System protection valve  Unloader valve  Brake lining and drums 

Slack adjusters

 Foot valve

Brake chamber

Push rod, clevis and pin

S- cam

Brake lining Brake drum

ADVANTAGES  Free resources so no refilling or changing required.  Air pressure is quick to act and hence air brakes are

immediate.

 The pressure of brake applied is directly proportional to

the air pressure.

 A little feather touch would apply the same pressure.  Air brakes can effectively stop loads of over 14 tons.

LIMITATIONS 

Excessive use of brake results in overheating and leads to brake fade. Brake fade results from excessive heat causing chemical changes in the brake lining that reduces friction and causes expansion of the brake drums.

 To reduce pressure loss problems : Reservoirs can be charged independently

of the brake pipe, this being accomplished via a check valve to prevent back feeding into the pipe. This arrangement helps to reduce the pressure loss problems, and also reduces the time required for the brakes to release.

 Air brake systems are not applicable to the pressure less than 60psi.  Excessive Oil and Water Present in the Air Brake System causes the

Reservoirs to corrode if not drained often enough.

APPLICATIONS  Air brakes are used on heavy trucks.

 Agricultural tractor and trailer.  Forestry vehicles.  City Works vehicles.

 Tractors with self propelled power engines.

CONCLUSION The air brake system is quick to act and the pressure applied on the brake is directly proportional to the air brake system. The efficiency of air brake system is relatively high when compared to the other types of brakes.

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