SUPERCHARGERS &
TURBOCHARGER
SUBMITTED BY:DISHANT DOWARAH ME-12/19
DISHA DAS ME-130/19
KHIRUD GOGOI ME-147/19
PRIYAM JYOTI DAS ME-159/19
SARWAR RAHMAN BARUAH ME-166/19
SUPERCHARGE
� A supercharger is an equipment that compresses the air being delivered to
engine, allowing the combustion chamber to be overfilled without enlarging
the space. The higher concentration of oxygen provided by a supercharger is matched with a larger amount of fuel from the fuel injectors thus
boosting the power of the engine.
WHY SUPERCHARGING?
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Increases the power of an engine.
Increases the torque produced.
Necessary in aero-planes as they have less oxygen at higher altitudes.
Ensures complete combustion of the fuel.
Reduces pollution to some extent.
ADVANTAGES OF SUPERCHARGING
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Power output of the engine can be increased.
More quantity of charge can be inducted in to engine cylinder.
Better atomization of fuel is possible.
Better mixing of air and fuel can be obtained
Better scavenging of exhaust gases is possible.
Torque is improved for whole speed range and better range and better
torque at low speed.
 The specific fuel consumption is lowered slightly.
 In Cl engines, exhaust smoke is reduced
DISADVANTAGES OF SUPERCHARGING
 Detonation tendency increases in Sl engines.
 Heat losses due to turbulence and thermal stresses are more.
 The valve overlap period increases up to 160°of crank angle Better
lubrication is required.
 Better cooling of piston and valves is required. It increases cost of the
engine.
TYPES OF SUPERCHARGERS
ROOTS SUPERCHARGERS
SUPERCHARGER
CENTRIFUGAL
SUPERCHARGERS
TWIN-SCREW
SUPERCHARGER
TURBOCHARGER
 Turbochargers are a type of forced induction system whose function is same
as that of Supercharger.
 In order to achieve the boost, the turbocharger uses the exhaust flow from the
engine to spin a turbine, which in turn spins an air pump.
 The turbocharger is bolted to the exhaust manifold of the engine. The exhaust
from the cylinders spins the turbine, which works like a gas turbine engine. The
turbine is connected by a shaft to the compressor, which is located between
the air filter and the intake manifold. The compressor pressurizes the air going
into the pistons.
HOW DOES A TURBOCHARGE WORKS?
� A turbo is made up of two halves joined together by a shaft. On one side, hot
exhaust gasses spin the turbine that is connected to another turbine which
sucks air in and compresses it into the engine. This compression is what
gives the engine the extra power and efficiency because as more air can
go in the combustion chamber, more fuel can be added for more power.
TURBOCHARGER LAG
 Turbocharger do not provide an immediate power boost, it takes a second
for the turbine to get up to speed before boost is produced.
 This results in a lag known as 'Turbo Lag'It is the time period required for the
exhaust gases to accelerate the turbine and compressor.
 It represents short delay period before the boost pressure increases
ADVANTAGES OF TURBOCHARGE:
 A turbocharger can be used in both petrol and diesel engines.
 A smaller turbo engine generates the same amount of power as a larger
naturally aspirated (NA) engine.
 A turbo engine is lighter than a NA (Naturally Aspirated) engine due to the
smaller engine capacity.
 A turbo engine may also deliver better fuel economy due to its compact
nature.
 Generally, turbo engines produce more torque in the lower rev range. It
results in excellent initial acceleration.
DISADVANTAGES OF TURBOCHARGER:
 Turbochargers are expensive, and the same applies to repair costs.
Replacing a turbo can be a costly affair.
 A turbo engine is less reliable than a NA engine. Since a turbocharger works
under a lot of stress, it is prone to breakdowns.
 You may experience turbo lag, which is a common problem in a turbo
engine. It is a slight delay in the delivery of power after you press the
accelerator pedal.
COMPARISION BETWEEN SUPERCHARGERS AND TURBOCHARGERS
TURBOCHARGING
The energy of the exhaust gases is used to
run supercharger
It needs a waste gate control
SUPERCHARGING
The mechanical energy of prime mover is
used to run supercharger
It does not require a waste gate control
It requires special exhaust manifolds
It does not require special exhaust control.
In CI engine it reduces smoke
In CI engines it reduces knocking
tendency.
No blade erosion problem
Blade erosion takes place due to entry of
dust particles
WHICH CARS USES SUPERCHARGER?
These are the cars that used supercharger engine:
 Audi S5 Sportback
 Jaguar F Type
 Range Rover Autobiography SV
WHICH CAR USES TURBOCHARGER?
These are the cars used turbocharge:
 Hyundai i20
 Kia sonnet
 Tata Altroz
 Mahindra thar
 XUV700
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THANK YOU.