Accord L4-2.2L SOHC VTEC (1994)
Ignition Coil: Description and Operation
Ignition Coil Replacement
Ignition Coil Schematic
PURPOSE
The Ignition Coil transforms battery voltage into ignition voltage and delivers it in the form of a high voltage surge to the secondary ignition
components.
OPERATION
Current flow through the primary winding is stored as a magnetic field. When current flow in the primary winding is interrupted (by the igniter
breaking the circuit ground), the magnetic field collapses, inducing a voltage surge into the secondary windings.
CONSTRUCTION
The Ignition Coil contains two windings of copper wire around a soft iron core. The primary winding is made of a hundred or so turns of wire.
The secondary winding contains several thousand turns of wire wound directly onto the iron core. The ratio of the number of wraps in the
secondary winding to the number of wraps in the primary windings determines the output voltage of the coil. The primary winding is connected
directly to the ignition switch (+) and ignition control module (-). The secondary winding is connected to the coil output tower through the iron
core.