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Ignition Systems. Or…. How to be a bright spark. Secondary Windings. Coil. Primary Windings. Soft Iron Core. Engine Driven Rotor and Magnets. Magneto Operation. IGNITION SYSTEM. IGNITION SYSTEM. S. S. S. S. N. N. N. N. S. S. S. S. N. N. N. N. Principal -. Coil Windings. - PowerPoint PPT Presentation
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Ignition SystemsIgnition Systems
Or…..Or…..
How to be a bright sparkHow to be a bright spark
IGNITION SYSTEMIGNITION SYSTEM
Magneto OperationMagneto Operation
CoilCoil
Soft Iron Soft Iron CoreCore
Secondary Secondary WindingsWindings
Primary Primary WindingsWindings
Engine Engine Driven Rotor Driven Rotor and Magnetsand Magnets
S N
IGNITION SYSTEM – Faraday Law
S NS NS NS NS NS NS N
Principal -Principal -
Each time the magnetic field ‘washes’ through wiresEach time the magnetic field ‘washes’ through wires
Volt Volt MeterMeter
An electrical current is producedAn electrical current is produced
Called an EMF – Electro Motive ForceCalled an EMF – Electro Motive Force
Coil Coil WindingsWindings
IGNITION SYSTEMIGNITION SYSTEM
Magneto OperationMagneto Operation
The magnetic The magnetic field passes field passes through soft through soft iron coreiron core
EMF produced in EMF produced in the coil windingsthe coil windings
IGNITION SYSTEM
No magnetic No magnetic field in soft iron field in soft iron core core
No EMF produced No EMF produced in the coil windingsin the coil windings
IGNITION SYSTEM
The magnetic The magnetic field passes field passes through soft through soft iron core iron core againagain
EMF produced in EMF produced in the coil windings the coil windings againagain
IGNITION SYSTEM – Magneto System
Ignition Switch
Distribution
Contact Breaker
Coil
Magneto
Condenser
Power Generation
Spark GenerationMagneto 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 SensorTiming
Disc
Engine Speed Sensing Unit
Alternator
Battery
IGNITION SYSTEM – Spark Plug
Cap Connector
Outer Casing
Hexagon
Ceramic Body
Copper Sealing Gasket
Outer Electrode
GapSecuring Thread
IGNITION SYSTEM – Spark Plug
Centre Electrode
These surfaces must be kept clean
Seal
Change Spark Plugs Change Spark Plugs at specified timesat specified times
Make sure the correct Make sure the correct Spark Plug is fittedSpark Plug is fitted
Cap Connector
Outer Casing
Hexagon
Ceramic Body
Copper Sealing Gasket
Outer Electrode
Securing Thread
Any Questions?Any Questions?