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2. Working principle
The ignition coil consists of primary winding, secondary winding, iron core and shell. When
the battery voltage is applied to the primary winding, the primary winding charges. Once
the ECU cuts off the primary winding circuit, the charging will be stopped. At the same time,
high voltage electricity will be induced in the secondary winding, and the spark will be
generated through the high voltage connecting line and spark plug discharge, which will
ignite the fuel air mixture in the cylinder.
3. Basic parameters
Working voltage: 6 ~ 16V;
Primary coil resistance: 0.53Ω±0.08Ω；
Secondary coil resistance: 8kΩ±1.2kΩ；
Primary coil inductance: 1mH±0.2mH；
Secondary coil inductance: 9.5H±1.9H；
Insulation resistance: under normal temperature, the insulation resistance between ignition
coil shell and spark plug cap copper sleeve is greater than 1000MΩ；
4. Possible failures
Open circuit of primary winding;
Breakdown and short circuit of secondary winding;
Surface discharge.
High voltage connecting line
1. Outline drawing
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