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6.
MAGNETO
6-1
OPERATION
AND
FUNCTION
The ignition system is
a
pointless flywheel magneto with automatic advancing characteristic.
Being different from the breaker point type ignition system, this system is completely free from such
troubles as starting-up failure due to dirty, burnt or corroded point surface.
The
electronic automatic advancing ensures extremely easy
starts
and stable high performance at oper-
ating speed by advancing the ignition timing to the most suitable point.
Ignition
liming
Control
Circuit
Automatic
Advancing
Control
Circuit
fig.
6-1
(a)
ELECTRONIC ADVANCING
FLYWHEEL
(B.T.D.c.)
MAGNETO
SYSTEM
26.5O
t
500
1000
2000
3000
(r.p.rn.)
ENGINE
REVOLUTION
Fig.
6-1
(b)
*
BASIC
THEORY
(1)
Revolution
of
the flywheel generates electricity on the primary side of the ignition coil, and the base
current
I1
flows to the power transistor. Current
I1
turns the power transistor
"ON"
and the electric
current
L
flows.
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44-