This document discusses different types of petrol fuel systems including gravity feed, pressure feed, vacuum, and pump systems. It describes the components of a petrol fuel system including the fuel tank and either a mechanical or electrical fuel pump. The document then explains how a carburetor mixes fuel and air for combustion in an internal combustion engine and compares simple and multi-point fuel injection systems, noting the advantages of MPFI systems including better performance and lower emissions but also higher costs.

1. PETROL FUEL SYSTEM
Creted by
PRAVEEN.

2. Types of fuel system
1.Gravity Feed System
2. Pressure Feed System
3. Vacuum System
4. Pump System
5. Fuel Injection
System

3. 2.Pump circulation system

4. 2.Pump circulation system

5. Components of petrol fuel sysytem

6. 1. Fuel tank

8. Fuel pump
Mechanica
l
Electrical

9. 1. Mechanical fuel pump

11. 2.Electrical fuel
pump

12. CARBURETOR

13. A carburetor is a device which helps in mixing fuel
and air together for facilitating internal combustion
inside an internal combustion engine.
This device passes the mixture of fuel and air to the
intake manifold (a device delivering air/fuel mixture
to the cylinders) of an internal combustion engine

14. SIMPLE CARBURETOR

15. MULTI POINT FUEL INJECTION SYSTEM
Advantages of MPFI
1.Excellent cold starting, warm-up (warrnup) and acceleration
ratio.
2. Increase in engine power output
3. Higher torque at lower engine speeds.
4.Low level atmosphere Pollution.
5. Increase in vehicle mileage
6. It is possible to use turbo or super charging system.
7. Air fuel mixture of equal volume and density reaches all
cylinders at the same time.

16. Disadvantages
1.High initial cost
2. Complex mechanism requires skilled and experienced
mechanics.
3.High maintenance cost
4. Computerized electronic equipment is required for engine
checkup and troubleshooting.

17. 1.MECHANICAL INJECTION

18. 2.ELECTRONIC
INJECTION