DETROIT DIESEL 53
3
SECTION 3
AIR INTAKE SYSTEM
CONTENTS
Air Intake System....................................................................................... 3
Air Silencer...................................................................... ........................... 3.2
Air Shutdown Housing.............................................................................. 3.3
Blower (In-Line)......................................................................................... 3.4
Shop Notes - Trouble Shooting - Specifications - Service Tools ......
AIR INTAKE SYSTEM
In the scavenging process employed in the Series 53 engines, a charge of air is forced into the cylinders by the blower
and thoroughly sweeps out all of the burned gases through the exhaust valve ports. This air also helps to cool the
internal engine parts, particularly the exhaust valves. At the beginning of the compression stroke, therefore, each
cylinder is filled with fresh, clean air which provides for efficient combustion.
The air, entering the blower from the air cleaner, is picked up by the blower rotor lobes and carried to the discharge side
of the blower as indicated by the arrows in Fig. I. The continuous discharge of fresh air from the blower enters the air
chamber of the cylinder block and sweeps through the intake ports of the cylinder liners.
The angle of the ports in the cylinder liners creates a uniform swirling motion to the intake air as it enters the cylinders.
This motion persists throughout the compression stroke and facilitates scavenging and combustion.
Fig. 1 - Air Flow Through Blower and Engine (In-Line Engine)
March, 1973 Sec 3
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