1. Gasoline Direct Injection GDIGDIGDI

2.  Introduction  Advantages of Fuel Injection over Carburetor  Main Components of Electronic Fuel Injection  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. MAIN COMPONENTS OF ELECTRONIC FUEL INJECTION 1.Engine Control Unit 2.Sensors 3. Fuel Injectors Engine Control Unit (ECU)  ECU is a computer that controls all of the electronic components on the engine. ECUEngine Exhaust Open loop Operation mode ECUEngine Oxygen Sensor Exhaust Closed loop Operation mode

6. Sensors  In order to provide the correct amount of fuel for every operating condition, the ECU has to monitor a huge number of input sensors.

7. 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.

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

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

10. GASOLINE DIRECT INJECTION

11. 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 COMPARISON WITH MPFI

12. BASIC TECHNICAL FEATURES OF GDI ENGINE  The Upright Straight Intake Port.  The Curved-top Piston.  The High Pressure Fuel Pump.  The High Pressure Swirl Injector.

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

14.  In-cylinder Airflow  Fuel Spray  Optimized Configuration of the Combustion Chamber Click Here

15. REALIZATION OF LOWER FUEL CONSUMPTION  Basic Concept  Combustion of Ultra-lean Mixture Click Here

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

17.  Emission Control

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

19. ACHIEVEMENTS  Engine performance  Vehicle Acceleration

20. CONCLUSION Frequent operation in stratified mode. Reduction of CO 2 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