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

 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...

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

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 1. Multipoint Fuel Injection 2. 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

GASOLINE DIRECT INJECTION

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

3.350 Fuel Pressure (MPa) Port InjectionIn-Cylinder Direct InjectionFuel System StandardUpright StraightIntake Port Flat top PistonCurved Top PistonCombustion Chamber 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

BASIC TECHNICAL FEATURES OF GDI ENGINE

 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

 Emission Control

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

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