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Ignition system - Lecture notes 3,4
Automobile Engineering (Government Polytechnic College, Neyyattinkara)
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, lOMoARcPSD|12082645
IGNITION SYSTEM
The function of ignition system is to deliver spark
1. At correct time
2. For correct duration
3. With correct strength
Types of Ignition System
1. Battery Ignition System
2. Magneto Ignition System
3. Electronic Ignition System
4. Capacitor Discharged Ignition System
5. Computerized Ignition System
Battery Ignition System
A battery of 12V is generally employed. There are two basic circuits in the system ie, the primary
and the secondary circuits. The battery, primary winding of the ignition coil, condenser and the contact
breaker form the primary circuit whereas the secondary wiring of the ignition coil, the distributor and
the spark plug constitutes the secondary circuit.
When the ignition switch is in the ON position, the current flowing in the primary circuit will
grow during the make period of the contact breaker. As the contact breaker points open, the magnetic
field built up by the growth of the current collapses, the energy stored during the make period is
projected into the secondary circuit as high voltage (25000v). From the secondary winding, the high
voltage surge is led to each spark plug in turn with the help of high tension cables and the distributor.
Downloaded by Akash Vp ()
Ignition system - Lecture notes 3,4
Automobile Engineering (Government Polytechnic College, Neyyattinkara)
StuDocu is not sponsored or endorsed by any college or university
Downloaded by Akash Vp ()
, lOMoARcPSD|12082645
IGNITION SYSTEM
The function of ignition system is to deliver spark
1. At correct time
2. For correct duration
3. With correct strength
Types of Ignition System
1. Battery Ignition System
2. Magneto Ignition System
3. Electronic Ignition System
4. Capacitor Discharged Ignition System
5. Computerized Ignition System
Battery Ignition System
A battery of 12V is generally employed. There are two basic circuits in the system ie, the primary
and the secondary circuits. The battery, primary winding of the ignition coil, condenser and the contact
breaker form the primary circuit whereas the secondary wiring of the ignition coil, the distributor and
the spark plug constitutes the secondary circuit.
When the ignition switch is in the ON position, the current flowing in the primary circuit will
grow during the make period of the contact breaker. As the contact breaker points open, the magnetic
field built up by the growth of the current collapses, the energy stored during the make period is
projected into the secondary circuit as high voltage (25000v). From the secondary winding, the high
voltage surge is led to each spark plug in turn with the help of high tension cables and the distributor.
Downloaded by Akash Vp ()
