Ignition Coils; Working Principle - Segway SNARLER ATV 2021 Series Service Manual

ELECTRICAL SYSTEM

Ignition coils

The ignition coil converts the low-voltage electricity of
the primary winding into the high-voltage electricity of the
secondary winding, and generates sparks through the
discharge of the spark plug to ignite the fuel-air mixture in
the gas cylinder.
The ignition coil is installed on the engine. Remove the
A
seat cushion to see the ignition coil installed on the
engine (see【A】in the fi gure below).

Working principle

The ignition coil is composed of a primary winding, a
secondary winding, an iron core, and a shell. When the
battery voltage is applied to the primary winding, the
primary winding is charged. Once the ECU cuts off the
primary winding loop, the charging is stopped and high
B
A
voltage is induced in the secondary winding. There are
three pins on the low voltage side of the ignition coil:
C
【A】MATING CONNECTOR RECOMMEND
SUMITOMO 6189-0027
【B】PIN 1：ECU CONTROL SIGNAL;
D
【C】PIN 2：ENGINE GROUND;
【D】PIN 3：UBATT+
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