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Construction Mechanic Advanced - Construction methods and practices | Next
Blower Removal and Disassembly |
AIR INDUCTION SYSTEM
The purpose of an air intake system is to supply the
air needed for combustion of the fuel. In addition, the
air intake system of a diesel engine will have to clean
the intake air, silence the intake noise, furnish air for
supercharging, and supply scavenged air in two-stroke
engines.
The three major components of the air induction
systems that increase internal combustion engine
efficiency are blowers, superchargers, and
turbochargers. They may be of the centrifugal or rotary
type, gear driven directly from the engine, or driven by
the flow of exhaust gases from the engine.
In the following sections, certain abnormal
conditions of air induction system components which
sometimes interfere with satisfactory engine operation
are covered. Also, methods of determining causes of
such conditions will be covered. Before performing any
work on these components, make sure you follow the
recommendations given in the manufacturer’s service
manual.
BLOWERS
Scavenging blowers are used to clear the cylinders
of exhaust gases to introduce a new charge of fresh air.
Superchargers and turbochargers increase the power
output of specific engines by forcing air into the
combustion chambers so that an engine can burn more
fuel and develop more horsepower than if it were
naturally aspirated.
Blower Inspection
The blower (fig. 5-36) may be inspected for any of
the following conditions without being removed from
Figure 5-36.-Blower and drive assembly and accessories.
5-30
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