Ignition Systems Or….. How to be a bright spark

IGNITION SYSTEM Magneto Operation Coil Soft Iron Core Secondary Windings Primary Windings Engine Driven Rotor and Magnets

S N IGNITION SYSTEM – Faraday Law S N S N S N S N S N S N S N Principal - Each time the magnetic field ‘washes’ through wires Volt Meter An electrical current is produced Called an EMF – Electro Motive Force Coil Windings

IGNITION SYSTEM Magneto Operation The magnetic field passes through soft iron core EMF produced in the coil windings

IGNITION SYSTEM No magnetic field in soft iron core No EMF produced in the coil windings

IGNITION SYSTEM The magnetic field passes through soft iron core again EMF produced in the coil windings again

IGNITION SYSTEM – Magneto System Ignition Switch Distribution Contact Breaker Coil Magneto Condenser Power Generation Spark Generation Magneto Unit Rotor Arm

IGNITION SYSTEM – Dynamo/Alternator System Dynamo/ Alternator Distributor Contact Breaker Coil Ignition Switch Secondary Windings Primary Windings Condenser Battery

IGNITION SYSTEM – Distributor Typical Distributor Centrifugal Advance Diaphragm Adjustable Plate ‘Points’ Cam Cap Body Input Shaft Centrifugal Weights Adjuster Vacuum Chamber Vacuum Advance Inlet Pressure

Ignition Switch Coil Packs IGNITION SYSTEM – Electronic Systems Control Unit Timing Sensor Timing Disc Engine Speed Sensing Unit Alternator Battery

IGNITION SYSTEM – Spark Plug Cap Connector Outer Casing Hexagon Ceramic Body Copper Sealing Gasket Outer Electrode Gap Securing Thread

IGNITION SYSTEM – Spark Plug Centre Electrode These surfaces must be kept clean Seal Change Spark Plugs at specified times Make sure the correct Spark Plug is fitted Cap Connector Outer Casing Hexagon Ceramic Body Copper Sealing Gasket Outer Electrode Securing Thread

Any Questions?