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GDI. GDI. GDI. GDI. Gasoline Direct Injection. Presented by P.MEGHANA 09001A0317 M.MOUNIKA 09001A0331. THE WAY WE PROCEED. Introduction Advantages of Fuel Injection over Carburetor Electronic Fuel Injection Multi Point Fuel Injection Gasoline Direct Injection
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GDI GDI GDI GDI Gasoline Direct Injection Presented by P.MEGHANA 09001A0317 M.MOUNIKA 09001A0331
THE WAY WE PROCEED... • 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
INTRODUCTION Port Injection (MPFI) Direct Injection (GDI) Carburetor Transition of Fuel Supply System
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.
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.
ELECTRONIC FUEL INJECTION • Multipoint Fuel Injection • Gasoline Direct Injection
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
MAJOR CHARACTERISTICS OF THE GDI ENGINE • Lower fuel consumption and higher output • Ultra-lean Combustion Mode • Superior Output Mode
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
In-cylinder Airflow • Fuel Spray • Optimized Configuration of the Combustion Chamber
REALIZATION OF LOWER FUEL CONSUMPTION • Basic Concept • Combustion of Ultra-lean Mixture
Vehicle Fuel Consumption • Fuel Consumption During Idling • Fuel Consumption during Cruising Drive
REALIZATION OF SUPERIOR OUTPUT • Improved Volumetric Efficiency • Increased Compression Ratio
ACHIEVEMENTS • Engine performance • Vehicle Acceleration
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