a brief about how gasoline direct injection technology works
TRANSCRIPT
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Direct Fuel injection is a developed technology that allows
gasoline engine to burn fuel efficiently ….
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What will be the result By implementing GDI..???
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By The Implementation of GDI , it provides cleaner emission , increased fuel economy and more energy in engine.
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How did fuel injection work before direct injection?
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The current gasoline ICE depends on 3 factors to make a perfect Air-fuel Mixture..: Oxygenated Air Fuel and Spark…..
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Types of Injection System Previously used..
Single –Point Injection System Multi-Point Injection system
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But previously the air-fuel mixing done by carburetors and single-point fuel injection systems that results in providing more fuel to first cylinder and too less to last cylinder.
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Multi – Point Fuel Injection
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How does direct injection improve performance?
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In direct Fuel Injection system the air and fuel are pre-mixed but in gasoline direct injection system they are not pre-mixed.
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Air Comes through intake manifold and gasoline directly injected into cylinder. Then the solution forms inside the cylinder.
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This solution allows the fuel burn more thoroughly and that gives a better mileage and more power to the wheels.
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How the GDI will process more efficient fuel rather than other system..??
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Leaner Mixture Vs Rich Mixture
When the amount of air is high in oil-fuel
mixture it’s called leaner mixture
When fuel percent is high that is called
rich mixture
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Efficiency of GDI
The exact Air-fuel mix used By GDI
is 40:1
instead of 14:7:1 that a
normal gasoline
engine mix
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These substance of air-fuel mixture decompressed within the combustion chamber and causes
unburned fuel at the end.
The fuel placed directly to the hottest combustion chamber that give a better mileage.
But in normal gasoline engine the fuel compression ends near to spark plug
The Efficiency Of GDI chamber
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Fuel Rail
Special Programming used By EMC
Catalytic Convertors
Different parts used By GDI
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This special programing system calculates the flow rate, fuel droplet size, emissions controls etc that provide a better air-fuel mixture to the engine.
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The Special catalytic convertors handles the direct injection engines' notoriously high oxides of nitrogen emissions that is very much harmful for environment.
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Components of a Direct Injection Fuel System
Common Rail System
Distributor and Inline
Pump System
Unit Direct System
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Common Rail System -- A long metal cylinder distributes fuel to the injectors under extremely high pressure
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Distributor and Inline Pump System – This system refers to either a rotary wheel distributor or plunger-style pump that is used to push pressurized fuel to the injectors
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Unit Direct System -- In this setup, the injector and a fuel pump is integrated into single unit and spray the mixture over each cylinder
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The advantages of GDI
Accurate control over air-fuel
Mixture
Optimal spray pattern that
breaks gasoline into smaller
droplets
More complete combustion ,
more gasoline burned
More energy output and
less pollution
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Complex work process
Most expensive
More rugged components used for withstanding the head and pressure
The Limitation Of GDI