Operating Principle - Honda CB400T Shop Manual

HONDA
TECHNICAL FEATURES
C B 4 0 0 T
OPERATING PRINCIPLE
CONDENSER
<SCHEMATIC DIAGRAM OF C.O.I. IGNITION SYSTEM>
1. As the AC generator rotor turns, current
is
induced in the AC generator (AC generat-
ing coil). This current is rectified as
it
passes through the diode Dl and is stored
in the condenser C,. During this process,
the SCR
is
keot OFF.
2. An electric pulse is generated by the fixed
pulser when the pickup reaches the point
where ignition must start. This is due to
changes in the flux. The pulse i s rectified
by the diode 2 and
is
applied to the gate of
SCR. As this happens. SCR turns ON
which in turn discharges the energy stored
in the condenser through the primary coil.
Sufficient potential is then developed at
the spark plug to ignite air-fuel mixture in
the combustion chamber.
18-6
Date of Issue: September, 1977
O HONDA MOTOR CO.. LTD.