The document discusses fuel injection systems. It begins with an introduction to fuel injection, noting that it mixes fuel with air and has replaced carburetors. It then describes the construction and working of fuel injection systems, including the fuel injector which injects fuel under high pressure. Different types of fuel injection systems are covered, including multi-point fuel injection and turbocharged direct injection. Advantages are discussed such as increased engine performance, decreased emissions, and increased efficiency. The document concludes that fuel injection and ignition technologies have revolutionized automobiles while allowing for better resource utilization and reduced pollution.

1. TECHNICAL SEMINAR
TOPIC :
FUEL INJECTION SYSTEM

2. TECHNICAL SEMINAR
 PERFORMED BY:
ANIKET WADHE

3. CONTENTS :
 INTRODUCTION :
 CONSTRUCTION AND WORKING :
 A)FUEL INJECTION SYSTEM
 MODERN DAY APPLICATIONS :
 CONCLUSION :

4.  INTRODUCTION :
 A)FUEL INJECTION :
Fuel injection is a system for mixing fuel with air in an Internal Combustion
Engine.
It has become the primary fuel delivery system used in gasoline automotive engines, having almost
completely replaced carburetors in the late 1980s.
With the advent of electronic fuel injection (EFI), the diesel and gasoline
hardware has become similar.

5.  The primary difference between
carburetors and fuel injection is that fuel
injection atomizes the fuel by forcibly
pumping it through a small nozzle under
high pressure, while a carburetor relies
on low pressure created by intake air
rushing through it to add the fuel to the
airstream.
 One of the first commercial fuel injection
systems was a mechanical system
developed by Bosch and introduced in
1955 on the Mercedes-Benz 300SL.

6. CONSTRUCTION AND
WORKING :
 A)FUEL INJECTION :
 The fuel injector is only a nozzle and a
valve: the power to inject the fuel comes
from a pump or a pressure container
farther back in the fuel supply.
 The functional objectives for fuel
injection systems can vary.
 All share the central task of supplying
fuel to the combustion process, but it is a
design decision how a particular system
will be optimized.

7. FUEL INJECTOR

10. TYPES OF FUEL INJECTION :
 Multi-point fuel
injection:
 Multi-point fuel
injection injects fuel
into the intake port
just upstream of the
cylinder's intake
valve, rather than
at a central point
within an intake
manifold.

11. Turbocharged Direct
Injection(TDI):
The engine uses direct injection where a fuel
injector sprays atomised fuel directly into the
main combustion chamber of each cylinder,
rather than the pre-combustion chamber
prevalent in older diesels which used indirect
injection.
The engine is coupled with a turbocharger to
increase the amount of air going into the
engine cylinders, and an intercooler to lower
the temperature (and therefore increase the
density) of the air from the turbo, thereby
increasing the amount of fuel that can be
injected and combusted.

12. ADVANTAGES:
These, in combination, allow for
greater engine performance.
It also decreases emissions.
Provides more torque than its
petrol engined counterpart.
The reduced material volume of
the direct injection diesel engine
reduces heat losses.

13. A direct injection engine is also
easier to start when cold, due to
more efficient placing and usage
of glowplugs.
Thereby increases engine
efficiency, at the expense of
increased combustion noise.

15. ADVANTAGES:
 The big difference between a conventional 4
stroke engines and the DTS-i engine is the
incorporation of 2 Spark Plugs.
 The 2 spark plug set up leads to better burning of
the air fuel mixture, which results in delivering
better fuel efficiency without any compromise in
power.
 With a DTS-i engine, one gets the dual benefit of
good fuel coupled with good power as well.

16. Conclusion:
 As We have discussed the functions of fuel
injection and ignition and some of their
types which are in common use nowadays,
these technologies have revolutionized
automobiles to a great extent.
 We also have a need to fully utilize the
resources available without polluting the
atmosphere.
 These reasons have paved way for
inventions like the above mentioned ones.

17. THANK YOU …