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
