Know the Various Types of Fuel Injection System

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KNOW THE VARIOUS TYPES OF FUEL INJECTION SYSTEM
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The most important component is the fuel
injector which decides how the fuel burns in the
combustion chamber.
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Carburetors were used to pump fuel into the inlet
manifold of the engine and the fuel distribution
was controlled by the amount of pressure applied
to the accelerator pedal.
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Nowadays, almost all cars are equipped with one
of the various techniques through which fuel can
be injected into the engine such as
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Single point injection
Multi-point fuel injection
Sequential fuel injection
Direct injection
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Single-point injection
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The fuel injectors are located in a core housing
and the fuel travels along with the air
throughout the intake manifold on its way to the
cylinders.
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The injectors are much easier to control than the
carburetor as the intake of fuel can be
controlled electronically to make its delivery
more accurate and consistent.
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This helps to achieve better throttle response
and increased fuel economy.
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Multi-point fuel injection
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In multi-point fuel injection, multiple injectors
are positioned on the intake manifold where the
inlet meets each combustion chamber.
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All individual injectors spray the fuel at the
same time into the cylinders.
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Delivering the fuel vapor so close to the intake
port ensures that there will be no wastage which
helps to achieve better air/fuel ratio.
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Sequential fuel injection
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The sequential fuel injection has advanced
engine controls which can change the sequence in
which the injectors fire the fuel.
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Sequential fuel injection only starts to spray
the fuel, when the intake valve opens for any
particular cylinder which avoids the wastage of
unused fuel.
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This small improvement proved to be more
significant when it increased both the
performance and efficiency of the car.
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Direct injection
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The direct fuel injection means the injection of
fuel directly into the cylinder at high pressure,
independent of air, which arrives separately via
the intake manifold.
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A computer controls when the fuel injectors to
open to let fuel into the engine and the fuel
injector is basically a small electric valve.
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By injecting the fuel close to the cylinder
head, the fuel stays atomized, so it will burn
better when ignited by the spark plug.
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