SUPERCHARGER
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seminar surveyer
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31-12-2010, 05:14 PM





.ppt   29016637-supercharger-ppt.ppt (Size: 3.34 MB / Downloads: 490)

By- Anshuman Panda
B.E. (8th sem)
Dayananda sagar college of engineering
B.E.(mechanical)


Content..
Supercharger , the engine booster.
Why supercharger ??
How it works ???
Working diagram of supercharger.
Classification of supercharger.
History.
Roots supercharger.
Twin-Screw Supercharger.
Centrifugal Supercharger.
Drives used in Supercharger.
Supercharger, An edge over turbocharger
Nothing is perfect.
Conclusion.


Supercharger, The Engine Booster
A supercharger is an equipment that compresses the air being delivered to an engine, allowing the combustion chamber to be overfilled without enlarging
the space.

The higher concentration of
oxygen provided by a super-
charger is matched with a larger
amount of fuel from the fuel injectors
thus boosting the power of the
engine.


Why Supercharger ??
Increases the power of an engine.
A supercharger spinning at 50,000 RPM translates to a boost of about six to nine pounds per square inch(psi).
Increases the torque produced.
An efficiently working supercharger can achieve the same speed in one third time.
Necessary in aero-planes as they have less oxygen at high altitudes.
Ensures complete combustion of the fuel.





Reduces pollution to some extent.




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seminar flower
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21-08-2012, 04:37 PM

SUPERCHARGERS


.ppt   supercharger.ppt (Size: 2.58 MB / Downloads: 60)

HISTORY

The Roots supercharger is the oldest design of supercharger.
Philander and Francis Roots patented the design in 1860 as a
machine that would help ventilate mine shafts.
In 1900, Gottleib Daimler for the first time included a Roots
supercharger in a car engine.

SUPERCHARGER, THE ENGINE BOOSTER

A supercharger is an equipment that compresses the air being delivered to an engine, allowing the combustion chamber to be overfilled without enlarging
the space.
The higher concentration of
oxygen provided by a super-
charger is matched with a larger
amount of fuel from the fuel injectors
thus boosting the power of the
engine.

WHY SUPERCHARGER??

Increases the power of an engine.
A supercharger spinning at 50,000 RPM translates to a boost of about six to nine pounds per square inch(psi).
Increases the torque produced.
An efficiently working supercharger can achieve the same speed in one third time.
Necessary in aero-planes as they have less oxygen at high altitudes.
Ensures complete combustion of the fuel.
Reduces pollution to some extent.

CLASSIFICATION OF SUPERCHARGERS

Based on method of compression, Superchargers can be classified as:-
1. Positive-displacement type, which deliver a nearly-fixed volume of air per revolution at all speeds and a fairly constant level of boost regardless of engine speed.
2. Dynamic compressors rely on accelerating the air to high speed and then exchanging that velocity for pressure by diffusing or slowing it down & deliver increasing boost with increasing engine speed.

ROOTS SUPERCHARGER

As the meshing lobes spin, air trapped in the pockets between the lobes is carried between the fill side and the discharge side & Large quantities of air move into the intake manifold and "stack up" to create positive pressure.
Roots superchargers are usually large and sit on top of the engine.
Roots superchargers are the least efficient supercharger for two reasons:-
1.)They add more weight to the vehicle.
2.)They provide air in discrete bursts instead of
providing in a smooth and continuous manner.

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