Electronic Ignition System: Definition, Parts, Working, Diagram, Advantages, and Disadvantages [PDF]

Electronic Ignition System is developed to improve reliability, improve mileage and decrease emission. Apart from the Battery and Magneto Ignition system, this is another important type of ignition system. It works under the engine to provide the spark to the spark plug. Here instead of the contact breaker, an armature is placed. To burn the lean mixture in the combustion chamber electronic ignition system produces a stronger spark that is really great as compared to the Battery and Magneto ignition system.

Electronic Ignition System Definition

As the name indicates “Electronic ” the system is fully controlled electronically.

Electronic Ignition System Parts

An Electronic ignition system consists of the following parts:

  • Battery
  • Ignition switch
  • Electronic control module
  • Armature
  • Ignition coil
  • Distributor
  • Sparkplug

Electronic Ignition System Diagram

Electronic Ignition System Diagram


A battery is an electrochemical system that stores energy and whenever require it gives out the energy. Battery plays an important role here. It is having two terminals positive(+) and negative(-). The positive terminal is connected to the key (Ignition switch). The negative terminal is connected to the ground.

Ignition switch

It is connected just after Battery. Ignition switch works to turn on and off the system. When it turns ON, the power is supplied from battery and when it is off, the power is cut off.

Electronic control module

Here the work starts electronically. It is used to turn ON and OFF the primary current. The ignition control module performs the same operation as that the contact point performs in another ignition system. It manages the dwell period (remains in a given state) on its own.


It plays an important role in generating the magnetic field. Here armature is used instead of contact breaker point as in a conventional ignition system.

Ignition coil

It is a pulse-type transformer, that is capable of producing short fire of high volt for beginning combustion. It produces high voltage required to make the current pass in the gap of the spark plug. An ignition coil consists of two sets of winding:

  1. Primary Winding (Outer winding).
  2. Secondary winding (Inner winding).


From the primary winding the current flows. The distributor controls on and off cycle of the current flow. The distributor makes spark occurs at each of the spark plugs and distributes high voltage to it.

Spark plugs

It uses ignition coil at high voltages to ignites the fuel.

Working Principle of Electronic Ignition System

A battery plays an important role in supplying power. The negative terminal is grounded and a positive terminal is connected to the ignition switch. Now when we turn on the ignition switch the power supply gets ON and further, the wire is connected to the electronic ignition module. Here all the work will be controlled electronically. From here it sends to the ignition coil. In Ignition coil there is two winding:

  1. Primary winding
  2. Secondary winding

Both winding are insulated and Primary is thicker than secondary winding. There is one iron rod in between them that generates a magnetic field. An armature is connected to the electronic module, the power comes and armature rotates. Here you can see magnetic pick-up. When the magnetic pick-up and armature touches, the voltage signal is generated. It keeps on running further until a strong voltage signal comes. The ON and OFF process continues. This voltage comes to the distributor section and here a rotor is connected. When the rotor rotates and touches the spark plug line it supplies the voltage and sparks plug gets ionized or we can say that the distributor distributes the voltages.

Applications of Electronic Ignition System

Following are the applications of the Electronic Ignition System:

Advantages of Electronic Ignition System

Following are some advantages of Electronic Ignition System:

  • It has fewer moving parts.
  • Low maintenance required.
  • Less emission is generated.
  • Efficiency is good.
  • It also increases fuel efficiency.

Disadvantages of Electronic Ignition System

Following are some disadvantages Electronic Ignition System and those are:

  • The cost of this system is high.


What are the different types of Ignition system?

Following are the 3 types of Ignition System:
1. Battery Ignition system.
2. Magneto Ignition system.
3. Electronic Ignition system.

What are the advantages of It?

The following advantages are:
1. Low maintenance required.
2. It increases fuel efficiency.
3. Less emission is generated.
4. Efficiency is good.
5. It has fewer moving parts.

What are the main parts or components?

1. Battery
2. Ignition switch
3. Electronic control module
4. Armature
5. Ignition coil
6. Distributor
7. Sparkplug


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