OPERATION
IGNITION SYSTEM
OPERATION
The ignition system
is
a condenser discharge type. The condenser built
in
the COl unit stores the electri-
cal
energy generated by the condenser charge coil.
The electrical energy stored in the condenser
is
released to the ignition coil primary windings by the igni-
tion timing
signal calculated by the COl unit from the pulser coil signal.
Ignition
timing varies based upon engine speed. Timing is fixed at 10° ATDC until the engine starts. Tim-
ing then varies from
5° ATDC to 30° BTDC based
on
engine speed.
Engine stop switch
Condenser
charge
coil
Pulser coil
Neutral
switch
~
CPU
Oil pressure
~
)----o-
----IL...-""::""--'
switch
Jr
'--
-
----
-
__
___
____
___
---.J
1. Power source circuit (Charging circuit)
2. Power source circuit
3. Base signal circuit
4. Hardware ignition signal circuit
5.
Software ignition signal contol circuit
6. Input circuit
7.
Input circuit
8. Output circuit
9. Output circuit
Ignition coil
Caution lamp
Tachometer
95
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