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IGNITION
SYSTEM
IGNITION SYSTEM
DIGITAL IGNITION CONTROL SYSTEM
DESCRIPTION
The electronic ignition that sparksthe engine
is computer controlled and operated
by
the
digital
CPU
(microprocessor). It has
a
pre-
This programed advance curve closely
matches the spark timing to the engine's
ignition requirements. Onlyone pickup coil is
needed to meet the requirements of the digi-
The digital ignitor also includes the control
unit for the electric fuel pump.
programed ignition advance curve.
tal
ignitor unit.
Clutch switch
Side stand switch
Pressure sensor
Pick up coil
CPU (microprocessor)
Digital ignitor unit
Fuel pump
Fuel pump control relay
Ignition coil
OPERATION
The following operations are digitally-per-
formed
by
signal from the pickup coil signal:
1.Determing proper ignition timing.
2.Sensing the engine revolution speed.
3. Determing timing for switching on ignition
coil (duty control).
4.
Increasing ignition coil primary current for
starting
the
engine.
5.Sensing engine stall.
6.
Preventing over-revolution
of
the engine.
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