Gasoline direct injection (GDI) provides advantages over traditional carbureted and multi-point fuel injected engines by directly injecting fuel into the combustion chamber. GDI engines can operate in both an ultra-lean combustion mode for lower fuel consumption and a superior output mode for increased power. Key features of GDI engines include higher compression ratios and optimized combustion chamber configurations for improved fuel efficiency and emissions performance compared to conventional multi-point port fuel injected engines. While initial costs are higher, GDI technology is expected to be widely adopted in the future as it allows for both reduced fuel consumption and controlled emissions from spark-ignition engines.

1. Gasoline Direct Injection
Presented by
KULKARNI SUYOG B.
GDIGDI
GDIGDI
GDIGDI GDIGDI
GOVERNMENT POLYTECHNIC AURAGABAD

2.  Introduction
 Advantages of Fuel Injection over Carburetor
 Electronic Fuel Injection
 Multi Point Fuel Injection
 Gasoline Direct Injection
 The Difference Between New GDI And Current MPI
 Technical features
 Major characteristics of the GDI engine
 Realization of lower fuel consumption
 Vehicle Fuel Consumption
 Realization of Superior Output
 Achievements
 Conclusion
THE WAY WE PROCEED...

3. INTRODUCTIONINTRODUCTION
Transition of Fuel Supply System
Carburetor Port Injection
(MPFI)
Direct Injection
(GDI)

4. ADVANTAGES OF FUEL INJECTION OVER CARBURETOR
☼ Fuel injection has no choke, but sprays atomized fuel
directly into the engine.
☼ Electronic fuel injection also integrates more easily with
computerized engine control systems.
☼ Multi port fuel injection delivers a more evenly
distributed mixture of air and fuel to each of the engine's
cylinders.
☼ Sequential fuel injection improves power and reduces
emissions.

5. ELECTRONIC FUEL INJECTIONELECTRONIC FUEL INJECTION
1. Multipoint Fuel Injection
2. Gasoline Direct Injection

6. MULTI POINT FUEL INJECTION SYSTEMMULTI POINT FUEL INJECTION SYSTEM
 Have a separate fuel injector for each cylinder .Have a separate fuel injector for each cylinder .
 Have better cylinder to cylinder distribution.Have better cylinder to cylinder distribution.
 Eliminate the need to preheat the intake manifoldEliminate the need to preheat the intake manifold

7. GASOLINE DIRECTGASOLINE DIRECT
INJECTIONINJECTION

8. WORKING OF GDIWORKING OF GDI

9. MAJOR CHARACTERISTICS OF THE GDI ENGINE
 Lower fuel consumption and higher output
• Ultra-lean Combustion Mode
• Superior Output Mode

10. BASIC TECHNICAL FEATURES OF GDI ENGINE

11. COMPARISON WITH MPFI
3.350Fuel Pressure (MPa)
Port InjectionIn-Cylinder Direct InjectionFuel System
StandardUpright StraightIntake Port
Flat top PistonCurved Top PistonCombustion Chamber
10.512.0Compression Ratio
Intake: 2, Exhaust: 2Number of Valves
IL-4Number of Cylinders
1834Displacement
81.0 x 89.0Bore x Stroke (mm)
Conventional MPFIGDIITEM

12. In-cylinder Airflow
Fuel Spray
Optimized Configuration of the Combustion Chamber

13. Vehicle Fuel Consumption
 Fuel Consumption During Idling

14.  Emission Control

15. ACHIEVEMENTS
 Engine performance
 Vehicle Acceleration

16. CONCLUSION
 As the GDI technology proved to be efficient in
terms of fuel consumption and controlled
emissions, the SI engines in near future will
adopt this.
 The limitations for this technology being, initial
cost of the system, increased service problem as
it has many wearing parts and they generate
more noise. Over coming the above drawbacks
in near future one can see GDI SI Engines on
roads.

17. Thank you