MX-5 Miata L4-1597cc 1.6L DOHC (1992)
Ignition Coil: Description and Operation
Ignition Coil Assembly
PURPOSE
This distributorless ignition system uses two ignition coils arranged as an assembly. These generate high voltage necessary to fire spark plugs.
LOCATION
Back of cylinder head.
OPERATION
When battery voltage flows through the outer, primary winding, a magnetic field is created. When current flow is stopped by the igniter
interrupting the ground connection, the magnetic field collapses onto the secondary windings, producing high voltage in the secondary windings.
Ignition wires then direct voltage to the spark plugs.
CONSTRUCTION
Each coil consists of two windings of wire, primary and secondary, around a laminated iron core. The ratio of primary winding turns to secondary
winding turns determines voltage multiplication.