magneto ignition system feature image

Magneto Ignition System: Definition, Parts, Working, Advantages, Disadvantages, Application (With PDF)

Amrit Kumar Automobile Engineering 2 Comments

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Magneto Ignition System Definition:

The magneto ignition system is an ignition system in which we use magneto for the generation of electricity and further that electricity is used in several things like :

  • To run the vehicles.

This is basically used in two-wheeler vehicles (SI Engine) nowadays.

A rotating magnet produces high voltage, which is used in:

  • Tractors, Outboard Motors
  • Washing Machines
  • Buses
  • Power Units, Marine Engines, and Natural Gas Engines.

Parts of Magneto Ignition System:

It consists of the following parts:

  1. Transformer core
  2. Contact Breaker
  3. Cam
  4. Capacitor
  5. Ignition Switch
  6. Distributor
  7. Spark Plug
Magneto Ignition System

Transformer core:

There are two types of winding we can see in Magneto Ignition System, those are:

  1. Primary Winding:
    • The main function of this winding is to draw the power from the source.
  2. Secondary Winding:
    • This winding has more turns of wire ( 1000 of turns of wire ) as compared to the primary winding.
    • This is connected to the Distributor (Which is having rotor )

Contact Breaker:

The contact breaker is regulated by the cam and when the breaker is open, current flows through the condenser and charges it.

Cam:

Cam is connected to the North and south magnet.

Capacitor:

The main work of the capacitor is to Store the charger.

Ignition switch:

Works for of and on the vehicles and this is set to the parallel of the capacitor because it helps to avoid the damage of excessive air.

Distributor:

This is connected to the spark plug and Distributor having the rotor.

Spark Plug:

The main work of the spark plug is firing the explosive mixture in the IC engine.

Working Principle of Magneto Ignition System:

As we studied the battery ignition system, The working principle of the magneto ignition system is similar, but in a magneto system, here is the difference between battery and magneto ignition system.

It’s used to produce energy but in the battery case, it wasn’t.

This is the procedure of how it works:

When the engine of the system starts, it helps magneto to rotate and thus it’s producing the energy in the form of high voltage then, one end of the magneto is grounded through contact breaker, and the ignition capacitor is connected to its parallel.

The contact breaker is regulated by the cam and when the breaker is open, current flows through the condenser and charges it.

Now the condenser is acting as a charger now, the primary current flow is reduced, thus reducing the overall magnetic field, generated in the system.

This increases the voltage in the condenser.

This increased high voltage in the condenser will act as an  EMF thus producing the spark, at the right spark plug through the distributor.

And at the starting stage, the speed of the engine is low and hence the voltage generated by the magneto is low.

But as the rotating speed of the engine increases, it also increases the voltage generated by the magneto thus the flow of the current is also increased.

Schematic Diagram of Magneto Ignition System:

Schematic Diagram of Magneto Ignition System:

Circuit Diagram of Magneto Ignition System:

Circuit Diagram of Magneto Ignition System

Applications of Magneto Ignition System:

Magneto Ignition System nowadays widely used in:

  • This system is used for the generation of electricity (In case of Battery system their Battery is used)  and to run the vehicles.
  • This is basically used in two-wheeler vehicles (SI Engine) nowadays.
  • A rotating magnet produces high voltage.
  • And also This is used in various places like:
    • Tractors, Outboard Motors
    • Washing Machines
    • Buses
    • Power Units, Marine Engines, and Natural Gas Engines.

Advantages of Magneto Ignition System:

These are the following advantages of Magneto Ignition System:

  • This system requires less maintenance as compared to the Battery ignition system.
  • This is more useful because no battery is used.
  • It occupies less space.
  • An electric circuit is generated by the magneto
  • No battery is needed, so no problem of battery discharge
  • Efficiency improves due to high-intensity spark.

Disadvantages of Magneto Ignition System:

Although there are some disadvantages:

  • During starting, the quality of spark is poor due to low speed.
  • This is a little expensive as compared to another ignition system.

Some FAQ:

What is Magneto Ignition System?

The magneto ignition system is an ignition system in which we use magneto for the generation of electricity.

How do magneto ignition systems work?

When the engine of the system starts, it helps magneto to rotate and thus it’s producing the energy in the form of high voltage. This increased high voltage in the condenser will act as an  EMF thus producing the spark, at the right spark plug through the distributor.

What are the 3 types of ignition systems?

The 3-types of Ignition Systems are:
1. Battery Ignition System
2. Magneto Ignition System
3. Electronic Ignition System

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That’s it for today, I hope you understand the Magneto Ignition System and able to make a difference between battery Ignition System too.

If you have any doubts regarding this feel free to comment down below I will love to answer your queries.

Do not forget to share my article with your social handle and give a chance to others Mechanical Engineering aspirants to learn more about it.

See you in any other article, till then Bye!

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About the Author

Amrit Kumar

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Amrit is a Co-founder of Learn Mechanical Portal (Previously owned "Engramritkumar.com"). He completed his diploma in Mechanical Engineering from Acharya Polytechnic Bangalore and also completed his B-Tech from Delhi. Amrit is now preparing for Govt. exams. If you need help, you can ask him regarding any suggestions in the mechanical engineering field. He loves to meet new people.

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