Direct Fuel injection is a developed technology that allows

gasoline engine to burn fuel efficiently ….

What will be the result By implementing GDI..???

By The Implementation of GDI , it provides cleaner emission , increased fuel economy and more energy in engine.

How did fuel injection work before direct injection?

The current gasoline ICE depends on 3 factors to make a perfect Air-fuel Mixture..: Oxygenated Air Fuel and Spark…..

Types of Injection System Previously used..

Single –Point Injection System Multi-Point Injection system

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.

Multi – Point Fuel Injection

How does direct injection improve performance?

In direct Fuel Injection system the air and fuel are pre-mixed but in gasoline direct injection system they are not pre-mixed.

Air Comes through intake manifold and gasoline directly injected into cylinder. Then the solution forms inside the cylinder.

This solution allows the fuel burn more thoroughly and that gives a better mileage and more power to the wheels.

How the GDI will process more efficient fuel rather than other system..??

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

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

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

Fuel Rail

Special Programming used By EMC

Catalytic Convertors

Different parts used By GDI

This special programing system calculates the flow rate, fuel droplet size, emissions controls etc that provide a better air-fuel mixture to the engine.

The Special catalytic convertors handles the direct injection engines' notoriously high oxides of nitrogen emissions that is very much harmful for environment.

Components of a Direct Injection Fuel System

Common Rail System

Distributor and Inline

Pump System

Unit Direct System

Common Rail System -- A long metal cylinder distributes fuel to the injectors under extremely high pressure

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

Unit Direct System -- In this setup, the injector and a fuel pump is integrated into single unit and spray the mixture over each cylinder

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

Complex work process

Most expensive

More rugged components used for withstanding the head and pressure

The Limitation Of GDI

Thank You