Magneto Ignition System: Its Definition & Working

What is Magneto Ignition System?

Magneto ignition system is an ignition system in which magneto is used [produces high voltage] 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 (Spark Ignition Engine) nowadays.

Parts of Magneto Ignition System

The main parts of Magneto Ignition Systems are:

  • Transformer core
  • Contact Breaker
  • Cam
  • Capacitor
  • Ignition Switch
  • Distributor
  • Spark Plug

Transformer core

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

Primary Winding: The main function of this winding is to draw the power from the source.

Secondary Winding: This winding has more turns of wire (the number is 1000 of turns of wire) as compared to the primary winding. This is connected to the Distributor (Which is having a rotor).

Contact Breaker

The contact breaker is regulated by the cam and when the breaker is open, current flows through the capacitor 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. The capacitor is used here is a simple electric capacitor.

Ignition switch

Works for off 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.

How does magneto ignition system work?

The magneto is a self-contained generator of high voltage that provides ignition to an engine through spark plugs. The moment the contact points open, a rapid magnetic flow generates a high voltage in the secondary coil, which ignites the spark plug, thus firing the engine

In the Magneto Ignition Systems, magneto is used. When the engine of the systems starts, it helps the 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 a 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 capacitor and charges it.

Now the capacitor 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 capacitor. This increased high voltage in the capacitor 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 Systems

Schematic Diagram of Magneto Ignition System

Applications of Magneto Ignition System

The magneto Ignition Systems nowadays widely used in:

  • This system is used for the generation of electricity (In the case of a 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 Systems:

  • 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 with battery discharge
  • Efficiency improves due to high-intensity spark.

Disadvantages of Magneto Ignition System

Although there are some disadvantages:

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

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

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

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