This power point presentation gives the overview of forced induction and the some of the tyoes in it and a solution to it.

2. This seminar gives the overview of forced induction processes for the engine and their
advantages and disadvantages. The forced induction is a process in combustion engines by
which we can increase the efficiency of an engine. The main purpose of forced induction process
is to increase the volumetric efficiency, reusing the waste hot gases, increasing the engine horse
power, reducing the emissions from the engine by maintaining the sufficient combustion rate. In
this seminar, we specifically discuss two important forced induction processes, one is
turbocharging and supercharging and which is best one for the engines that we are using in real
world. What is the solution if two process aren’t fit separately?

3. What is forced induction?
Process of delivering the compressed air.
Why forced induction?
Increase the engine power efficiency, total compression ratio.
Maximum energy per unit of fuel.

4. 1. Turbocharger
2. Supercharger
3. Nitrous oxide (NO2 )

5. ◦ What is a turbocharger?
Turbine driven forced induction device
◦ Why turbocharging?
Increase performance of an engine, fuel
efficiency.
◦ How it operates?
Turbine drive the compressed air into the
engine
◦ Turbo lag
◦ Boost threshold

6. 1. Twin turbochargers
2. Twin scroll turbochargers
3. Variable geometry turbochargers.

7. ◦ Two separate turbochargers
◦ Parallel or series
◦ Parallel – one half of engine’s exhaust
◦ Series – one runs on low speed and other on
high speed

8. 1. Two exhaust nozzles
2. Two inlet nozzles
3. Physically separate the channels for the
cylinders

9. 1. Use movable vanes
2. Adjusted by actuator
3. Maintains exhaust velocity and back pressure

10. ◦ What is a supercharger?
Air compressor that increases the engine’s performance
◦ Why supercharging an engine?
To produce the boost when engine operates
◦ How it operates?
Types
1. Positive displacement type
2. Dynamic compressor type

12. 1. Meshing lobes
2. Air trapped between fill side and discharge
side
3. Large and sit on top of the engine
4. External compression type
5. Add weight
6. Least efficient superchargers
7. Back flow

13. 1. Lysholm – style blowers
2. Use meshing lobes like worm gears
3. Compress the air inside the root housing
4. More efficient and more cost
5. More noise
6. Internal compression type
7. No back flow

15. 1. Powers an impeller
2. Resembles turbocharger
3. Uses impeller
4. Convert the high speed, low pressure air to
low speed, high pressure air
5. Most efficient and most commonly used forced
induction systems

17. TURBOCHARGERS
1. Cost is nearly same as superchargers
2. Lag
3. Uses waste gases to run
4. It is very hot in condition
5. Surge may deliver to the engine
6. Back pressure
7. Less noise
8. Less reliable
9. Difficult to install and tune
10. High power output and runs even at high rpm
SUPERCHARGERS
1. Cost is nearly same as turbochargers
2. No lag
3. Uses crank power to run
4. Fresh air discharge
5. No surge
6. No back pressure
7. More noise
8. More reliable
9. Easy to install and tune
10. Less power output when compared to turbos

18. While the supercharger is generally considered to be a method of forced induction for most
street and race vehicles, the turbo will always have its place in a more specialized market.
Superchargers generally provide a much broader powerband that most drivers looking for with
no “turbo lag”. In addition, they are much easier to install and tune.

20. ◦ Uses both turbocharger and supercharger
◦ Desirable for small displacement motors with
high rpm
◦ Roots charger and turbocharger in series
◦ Electromagnetic clutch
◦ Low rev – supercharger
◦ Later turbo join
◦ Then both contribute
◦ High rev – supercharger disengages
◦ High cost