ARIA

ENGINE

101

2.1.4 AIR INTAKE SYSTEM

2.1.4.1 SYSTEM LAYOUT

Atmospheric air is drawn into the combustion

chamber through the air intake system as shown in

above schematic layout. The air intake system

should have the ability to supply sufficient quantity

of air to the engine.

The air is driven to the intake manifold primarily due

to the suction created by the engine. The fresh air

from the outside atmosphere is made to pass

through an air filter and into the turbocharger. Here

the air is compressed by the turbocharger which is

driven by exhaust gasses. It then passes through

the intercooler where temperature of the com-

pressed air is reduced and then into the combustion

chamber through intake manifold.

EGR cooler module with EGR and bypass valve

(For Exhaust Gas Recirculation)

is used to reduce

the NOx emission levels. This assembly comprises

of EGR valve, EGR cooler and bypass valve. A part

of the exhaust gas is tapped from the exhaust mani-

fold and made to mix with the air coming from the

intercooler before entering the intake manifold.

For

more details on EGR cooler with bypass valve, refer

Exhaust System.