H I G H V O LTA G E S PA R K
PLUG CABLES
1
2
3
4
5
6
S PA R K P L U G S
5
1
3
DISTRIBUTOR
CAP AND
ROTOR
4
6
2
BREAKER
CAM
IGNITION
RESISTOR
DISTRIBUTOR
IGNITION
SWITCH
OIL
CUP
PRIMARY
BREAKER
POINTS
POINT
P L AT E
B AT T E RY
SECONDARY
IGNITION
COIL
ASf06041
Figure 6-41.--Conventional battery ignition system.
magnetic field builds up around it. The magnetic lines
Since the primary and secondary windings of an
of force link the primary and secondary windings and
induction coil are stationary windings, some means
induce voltage in each winding. In the primary
other than movement of the windings is used to change
winding, the induced voltage opposes the battery
the magnetic flux linking the coils. The effect is created
voltage. For this reason, the magnetic field is not
by a make-and-break device (breaker points) in the
built up instantly; it requires a fraction of a second
primary circuit. When the breaker points are closed,
to reach full strength. This is called the saturation
current flows through the primary coil; the
6-37
