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1.2L REVOTRON ENGINE

73

5. Intercooler

The intercooler is a heat exchanger used to cool

the compressed hot air coming from the

turbocharger before it enters the intake manifold.

It increases the density of the air and avoids the

chance of pre-ignition due to high intake air

temperature. The intercooler is mounted in front of

the radiator.

6. Turbocharger (Waste Gate Turbocharger)

Turbochargers are a type of forced induction

system. They compress the air flowing into the

Engine .The advantage of compressing the air is

that it lets the engine squeeze more air into a

cylinder, and more air means that more fuel can

be added. Therefore, you get more power from

each explosion in each cylinder. A turbocharged

engine produces more power overall than the

same engine without the charging. This can

significantly improve the power-to-weight ratio for

the engine.

In order to achieve this boost, the turbocharger

uses the exhaust flow from the engine to spin a

turbine, which in turn spins an air pump. The

turbine in the turbocharger spins at speeds of up

to 150,000 rotations per minute (rpm) -- that's

about 30 times faster than most car engines can

go. And since it is hooked up to the exhaust, the

temperatures in the turbine are also very high.

7. Manifold Air Pressure Sensor And

Temperature Sensor (T-MAP)

T-MAP sensor consists of a silicon chip mounted

inside a reference chamber. On one side of the

chip is the reference chamber and on the other

side is the pressure to be measured. The

electrical resistance of the chip varies with the

variation of pressure. This change in resistance

alters the voltage signal. ECM interprets the

voltage signal as pressure and any change in

voltage signal as change in pressure. The

temperature sensor element is a NTC resistor.