Automobile Engineering | Explain working of battery ignition system with neat sketch.

Battery ignition system for four cylinder engine 

• When the ignition switch is in the ON Position, current flows from the battery to the primary winding of ignition coil.  
• The current in the primary circuit goes on increasing exponentially during the period that the contact breaker points are connected. 
• The laminated core of the ignition coil stores the electromagnetic energy generated on account of this current built up in the primary circuit. 
• When the contact breaker points open, the electromagnetic field built up in the primary circuit collapses and the energy is projected in the secondary circuit.  
• As the break period of contact breaker is very short, the EMF voltage induced in secondary circuit is very high and is proportional to the rate of change of flux in winding.  
• This sudden high voltage generated is directed to specific spark plug as per the firing order with the help of distributor. 
• The condenser stores energy during this break period of contact breaker and releases it during the make period, thereby avoiding acting at contact breaker point. 
• The voltage multiplication is dependent on the number of turns of primary and secondary winding of ignition coil.