Gasoline Direct Injection

1. GDI GDI GDI Gasoline Direct Injection

2. THE WAY WE PROCEED... • 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

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

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. Oxygen Sensor ECU Engine Exhaust Closed loop Operation mode ECU Engine Exhaust Open loop Operation mode MAIN COMPONENTS OF ELECTRONIC FUEL INJECTION • Engine Control Unit • Sensors • 3. Fuel Injectors Engine Control Unit (ECU) • ECU is a computer that controls all of the electronic components on the engine.

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. Multipoint Fuel Injection • Gasoline Direct Injection ELECTRONIC FUEL INJECTION

9. 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

10. GASOLINE DIRECT INJECTION

11. ITEM GDI Conventional MPFI Bore x Stroke (mm) 81.0 x 89.0  Displacement 1834  Number of Cylinders IL-4  Number of Valves Intake: 2, Exhaust: 2  Compression Ratio 12.0 10.5 Combustion Chamber Curved Top Piston Flat top Piston Intake Port Upright Straight Standard Fuel System In-Cylinder Direct Injection Port Injection Fuel Pressure (MPa) 50 3.3 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 Click Here • Fuel Spray Click Here Click Here • Optimized Configuration of the Combustion Chamber

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

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 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

21. THANK YOU