1. Gasoline Direct Injection Presented by P.MEGHANA 09001A0317 M.MOUNIKA 09001A0331 Presented by P.MEGHANA 09001A0317 M.MOUNIKA 09001A0331 GDI GDI GDI GDI

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. INTRODUCTION 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. Fuel Injectors  A fuel injector is nothing but an electronically controlled valve.  When the injector is energized, an electromagnet moves a plunger that opens the valve, allowing the pressurized fuel to squirt out through a tiny nozzle.  It is controlled by the ECU.  A pipe called the fuel rail supplies pressurized fuel to all of the injectors.

6. ELECTRONIC FUEL INJECTION 1. Multipoint Fuel Injection 2. Gasoline Direct Injection

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

8. GASOLINE DIRECT INJECTION

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

10. 3.350 Fuel Pressure (MPa) Port InjectionIn-Cylinder Direct InjectionFuel System StandardUpright StraightIntake Port Flat top PistonCurved Top PistonCombustion Chamber 10.512.0 Compression Ratio  Intake: 2, Exhaust: 2Number of Valves  IL-4Number of Cylinders  1834Displacement  81.0 x 89.0 Bore x Stroke (mm) Conventional MPFIGDIITEM COMPARISON WITH MPFI

11. BASIC TECHNICAL FEATURES OF GDI ENGINE

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

13. REALIZATION OF LOWER FUEL CONSUMPTION  Basic Concept  Combustion of Ultra-lean Mixture

14. Vehicle Fuel Consumption  Fuel Consumption During Idling  Fuel Consumption during Cruising Drive

15.  Emission Control

16. REALIZATION OF SUPERIOR OUTPUT  Improved Volumetric Efficiency  Increased Compression Ratio

17. ACHIEVEMENTS   Engine performance  Vehicle Acceleration

18. CONCLUSION   Frequent operation in stratified mode.   Reduction of CO2 production by nearly 20 percent.   Provides improved torque 5-10%   Fulfills future emissions requirements.   97% NOx reduction is achieved.   Improve the brake specific fuel consumption.   Smooth transition between operation modes.   Reduced fuel consumption 15-20%   Up to 5% more power   Spontaneous response behavior

19. Queries?

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