gasoline direct injection presented by p.meghana 09001a0317 m.mounika 09001a0331 presented by...
TRANSCRIPT
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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