The presentation is discussing 1-Fuel Cycle when Car starts working 2-Design of fuel system (components) 3-Types of fuel System 4-Carburetor working at different Engine speeds 5-injection working at different Engine speeds 6-Which is preferable of fuel systems (advantage and disadvantage of different system)

1. Fuel Systems
Gasoline
Created by
Mahmoud Khairy

2. Fuel System (Gasoline)
Points of Presentation
Fuel Cycle when Car starts working
Design of fuel system (Parts)
Types of fuel System
Carburetor working
injection working
Which is preferable of fuel systems
Thanking

3. Fuel Cycle when Car starts working
 When you put the key in contact and key rotates at the
second time the Starter go engaged with flywheel
causes it to rotate which causes the Crank shaft and
timing belt to rotate and causes Fuel pump to rotate

4. Design of fuel system
 Main Parts of any Fuel Systems
Fuel tank
Fuel Pump
Fuel lines
Fuel Filters

5. Types of Fuel systems
Carburetor Injection

6. Carburetor Working
Fuel movement outside
carburetor
Fuel movement inside
Carburetor

7. Injection Working
 Inject the amount of fuel needed according to engine
operations
it is controlled automatically

8. Engines Operations
in Carburetor
Idling the Gasoline goes
from float to intake
manifold through idling
port Because
thermostatic spring don't
expand and choke valve
closes Main nozzle and
Throat Valve closed and
then go to Combustion
Chamber and air go to it
from port in intake
manifold

9. Engines Operations
in Carburetor
Low speed the Gasoline
goes from float to intake
manifold through idle
port and low speed port
Because thermostatic
spring don't expand and
choke valve closes Main
nozzle and throat valve
opens and vacuum
begins to decrease

10. Engines Operations
in Carburetor
Normal conditions the
Gasoline goes from float
to throat valve from
Main nozzle Because
thermostatic spring
expand and choke valve
opens then to intake
manifold and throat
valve opens more and
then goes to intake
manifold

11. Engines Operations
in Carburetor
Full Power the Gasoline
goes from float to throat
valve from Main nozzle
thermostatic spring
expand and choke valve
opens then to intake
manifold and throat
valve opens completely
and then goes to intake
manifold

12. Which is preferable of fuel
systems?
 Disadvantage of Carburetor
uses a lot of fuel especially in idling
due to loss of fuel in cold start as
some of fuel become volatile and
don’t burn
more emissions produce
 Advantage of Injection
inject the amount of fuel needed
according to engine operations
less emissions
atomization because the air fill the
spaces between fuel molecules so
most fuel molecules will be burnt
and will increase the burning
effectiveness
according to the previous Injection
preferred

13. Thank you hope you
like it
Mahmoud Khairy