Transcript Chapter 6 Ignition - PowerPoint Presentation

Ignition Systems
Or…..
How to be a bright spark
Magneto Operation
Secondary
Windings
Coil
Primary
Windings
Soft Iron
Core
Engine
Driven Rotor
and Magnets
IGNITION SYSTEM
Principal -
S
N
Coil
Windings
Each time the magnetic field ‘washes’ through wires
An electrical current is produced
Called an EMF – Electro Motive Force
IGNITION SYSTEM – Faraday Law
Volt
Meter
Magneto Operation
EMF produced in
the coil windings
The magnetic
field passes
through soft
iron core
IGNITION SYSTEM
No EMF produced
in the coil windings
No magnetic
field in soft iron
core
IGNITION SYSTEM
EMF produced in
the coil windings
again
The magnetic
field passes
through soft
iron core again
IGNITION SYSTEM
Rotor Arm
Magneto Unit
Spark Generation
Condenser
Power
Generation
Coil
Distribution
Magneto
Contact
Breaker
Ignition
Switch
IGNITION SYSTEM – Magneto System
Distributor
Condenser
Coil
Secondary
Windings
Primary
Windings
Ignition
Switch
Contact
Breaker
Dynamo/
Alternator
Battery
IGNITION SYSTEM – Dynamo/Alternator System
Typical
Distributor
Vacuum Advance
Adjustable
Plate
Diaphragm
Vacuum
Chamber
Cap
‘Points’
Body
Inlet
Pressure
Cam
Adjuster
Centrifugal
Advance
Input
Shaft
Centrifugal
Weights
IGNITION SYSTEM – Distributor
Engine Speed Sensing Unit
Timing
Sensor
Timing
Disc
Control Unit
Ignition
Switch
Coil
Packs
Alternator
Battery
IGNITION SYSTEM – Electronic Systems
Cap Connector
Ceramic Body
Hexagon
Outer Casing
Copper Sealing Gasket
Securing Thread
Gap
Outer
Electrode
IGNITION SYSTEM – Spark Plug
Cap Connector
Ceramic Body
Seal
Hexagon
Centre Electrode
Change Spark Plugs
at specified times
Outer Casing
Copper Sealing Gasket
Securing Thread
Make sure the correct
Spark Plug is fitted
These surfaces must be
kept clean
Outer
Electrode
IGNITION SYSTEM – Spark Plug
Any Questions?