|Carburetor vs fuel injection
Question : I AM a novice as far as cars
are concerned, having only
passed my driving test a fortnight ago.
I have heard of the terms
"carburetor" and "fuel injection" but never found out
what they mean. Can you
BOTH the carburetor and fuel
injection systems are fuel-metering devices.
In an internal combustion
engine, the amount of fuel
entering the engine is measured
by either a carburetor or a fuel
In order to minimize fuel
consumption, maximize power
output and keep emission of
toxic gases low, the ratio of fuel
to air entering the combustion
chamber must be
approximately 1 part to 142 (in
terms of mass).
A carburetor is a "suck
through" device, whereby air is
sucked into the engine via the
carburetor. The higher the flow
of air, the higher the rate of fuel
Carburetors work well but
are relatively crude and inaccurate mechanical devices.
On the other hand, a modern
fuel injection system uses electronic devices to accurately measure the amount
of air flowing into the engine. A computer called the Engine Control
Unit (ECU) calculates precisely
the amount of fuel required and
the appropriate volume of fuel
is injected into the engine.
Carbureted fuel systems are
fast becoming extinct because
they are unable to meet the
strict exhaust pollution standards set by many countries
around the world.