Gasoline Direct InjectionGasoline Direct Injection

Presented by

P.MEGHANA 09001A0317

M.MOUNIKA 09001A0331

Presented by

P.MEGHANA 09001A0317

M.MOUNIKA 09001A0331

GDIGDIGDIGDI GDIGDI

GDIGDI

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.

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 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 INJECTION

GASOLINE DIRECT INJECTION

MAJOR CHARACTERISTICS OF THE GDI ENGINE

Lower fuel consumption and higher output

• Ultra-lean Combustion Mode• Superior Output Mode

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

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

Queries?

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