Gasoline Direct Injection

Presented by

KULKARNI SUYOG B.

GDIGDI

GDIGDI

GDIGDI GDIGDIGOVERNMENT POLYTECHNIC AURAGABAD

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...

INTRODUCTIONINTRODUCTIONTransition 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.

ELECTRONIC FUEL INJECTIONELECTRONIC FUEL INJECTION

1. Multipoint Fuel Injection

2. Gasoline Direct Injection

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

GASOLINE DIRECT GASOLINE DIRECT INJECTIONINJECTION

WORKING OF GDIWORKING OF GDI

MAJOR CHARACTERISTICS OF THE GDI ENGINE

Lower fuel consumption and higher output • Ultra-lean Combustion Mode• Superior Output Mode

BASIC TECHNICAL FEATURES OF GDI ENGINE

COMPARISON WITH MPFI

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

In-cylinder Airflow

Fuel Spray

Optimized Configuration of the Combustion Chamber

Vehicle Fuel Consumption

Fuel Consumption During Idling

Emission Control

ACHIEVEMENTS Engine performance

Vehicle Acceleration

CONCLUSION

As the GDI technology proved to be efficient in terms of fuel consumption and controlled emissions, the SI engines in near future will adopt this.

The limitations for this technology being, initial cost of the system, increased service problem as it has many wearing parts and they generate more noise. Over coming the above drawbacks in near future one can see GDI SI Engines on roads.

Thank you