electrical system is provided to supply power for
starting the engine and for igniting it during operation.
The operation of an internal combustion engine requires
an efficient cooling system. Water-cooled engines use a
water pump and fan while air-cooled engines use a
blower to force cool air around the engine cylinders.
In addition, an exhaust system is provided to carry
away the burned gases exhausted from the engine
cylinders. These systems will not be discussed in this
course, however. For further information, refer to
NAVPERS 10644G-1, Construction Mechanic 3 & 2.
This chapter explained briefly the following
operational principles and basic mechanisms of the
internal combustion engine:
The power of an internal combustion engine comes
from the burning of a mixture of fuel and air in
a small, enclosed space.
The movement of the piston from top to bottom is
called a stroke.
To produce sustained power, an engine must
repeatedly accomplish a definite series of
operations. This series of events is called a
Engine classifications are based on the type of fuel
usedgasoline or diesel.
Design and size must be considered before engine
Engines require the use of auxiliary assemblies such
as the fuel pump, the carburetor, and an