Download Ignition System

IGNITION SYSTEM
Presented by
ALFAZ.P
59
Ignition System
•Provides a method of turning a spark ignition engine on & off.
•Operates on various supply voltages (Battery & Alternator)
•Produces high voltage arcs at the spark plug electrode.
•Distributes spark to each plug in correct sequence.
•Times the spark so that it occurs as the piston nears the TDC on the
compression stroke.
•Varies the ignition timing as engine speed, load and other conditions
change.
Ignition Parts
BATTERY provides power for system.
IGNITION SWITCH allows driver to turn ignition on and off.
IGNITION COIL changes battery voltage to 30,000V during
normal operation and has a potential to produce up to 60,000V.
SWITCHING DEVICE mechanical or electronic switch that operates
Ignition coil(Pick-up coil, Crank sensor, Cam sensor).
SPARK PLUG uses high voltage from ignition coil to produce an arc
in the combustion chamber.
IGNITION SYSTEM WIRES connect components.
Ignition Circuits
PRIMARY CIRCUIT
•Includes all the components
working on low voltage
(Battery, Alternator).
SECONDARY CIRCUIT
•Consists of wires and points
between coil out-put and the
spark plug ground.
Ignition Coil
Primary Windings are made up of several
hundred turns of heavy wire wrapped around
or near the secondary windings.
Secondary Windings consist of several thousand
turns of very fine wire, located inside or near
the secondary windings.
Distributor
•Actuates the on/off cycle of current flow through the ignition coil
primary windings.
•It distributes the coils high voltage to the plugs wires.
Distributor
•It causes the spark to occur at each plug earlier in the compression
stroke as engine speed increases, and vice versa.
•Changes spark timing.
•Some distributor shafts operate the oil pump.
Distributor Rotor
•Transfers voltage from the distributor cap
center terminal(coil) to distributor cap
outer terminals(spark plugs).
•Provides spark in the correct Firing Order.
•Sometimes the firing order can be found
on the intake manifold.
Rotor Arm
Magneto Unit
Spark Generation
Condenser
Power
Generation
Coil
Distribution
Magneto
Contact
Breaker
Ignition
Switch
IGNITION SYSTEM – Magneto System
THANK YOU