The presentation covers the concept of Superchargers in automobiles. A supercharger is an air compressor used for forced induction of an internal combustion engine.

1. SUPERCHARGER
By: Bhanu Arora

2. INTRODUCTION
 A supercharger is an air compressor
used for forced induction of an
internal combustion engine.
 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.

3. Principle of working
 More fuel + More air = Bigger explosion =
Greater horsepower.
 But we cannot simply pump
more fuel into the engine.
 The chemically correct mixture
– (14 : 1 :: air : fuel) – is essential
for an engine to operate perfectly.

4. Principle of working
 Thus superchargers provides
more air by compressing air
above atmospheric pressure ,
hence providing more fuel into
the charge & would make for a
more powerful explosion .
 Thus: Increased Power , Torque and
Speed is achieved.

5. SUPERCHARGER TYPES
BASICLY THREE MAIN TYPES OF THE SUPERCHARGERS:-
 Roots
 Centrifugal
 Twin Screw

6. Roots supercharger
It consists two cylindrically shaped lobes in opposite
direction in a common housing.
Air enters the space in between the rotor lobes at inlet
and is carried around the rotor to discharge port.

7. A standard engine with the addition of a supercharger

8. Centrifugal Superchargers
 It consists an impeller which is rotates in
clock-wise direction.
 The air enters the hub of the impeller axially
and is turned radially by radial vanes.
 The air leaves the impeller at high speed, but
low pressure.
 A diffuser converts the high-speed , low-
pressure air to low-speed , high-pressure air.

10. Twin-Screw Supercharger
 It contains a set of worm gears.
 Air enters in supercharger through the top rear and it’s
compressed between the rotors.
 The male rotor is rotates in clock-wise while female
rotor rotates counter clock-wise and compressed air
between them.

11. Twin-Screw Supercharger
 Once the air is screwed and
compressed the full length of the
rotors it remains in compressed
state between the rotors until the
engine demands the boosted air.

12. Supercharging vs Turbocharging
 Mechanically driven superchargers
may absorb as much as a third of
the total crankshaft power of the
engine and are less efficient than
turbochargers.

13. Supercharging vs Turbocharging
 Turbochargers suffer (to a
greater or lesser extent) from
so-called turbo-spool (turbo
lag; more correctly, boost lag),
in which initial acceleration
from low RPM is limited by
the lack of sufficient exhaust
gas mass flow(pressure)

14. Drives used in supercharger
Mechanical:-
 Belt
 Gear drive
 Chain drive.
Other:-
 Electric motor.

15. Advantages of Supercharger
 Increased power
 No lag – Consistent power delivery
 Generally better throttle response
 No Special Procedures or extra maintenance
 Easier to install than turbochargers

16. Disadvantages of Supercharger
 Consumes a lot of power from the engine (therefore not very efficient).
 Increases the strain on the engine
 Expensive
 Noise

17. THANK YOU