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Download Ignition System
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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