Honda CM400A - Operating Principle

HONDA
TECHNICAL FEATURES
CB400T
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
is 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.