Transistor ignition system

To overcome the burning of contact breaker points and production of the low spark voltage during high engine speed a Transistor is being used as a switch

1. 19A502 - AUTOMOTIVE ELECTRONICS AND ELECTRICALS TRANSISTOR IGNITION SYSTEM MANU KRISHNA M R 19A226

2. INTRODUCTION A transistor interrupts a relatively high current carrying circuit, i.e, it controls high current in the collector circuit with less current in the base circuit. Therefore, a transistor is used to assist the work of a contact breaker. Hence, this system is known as Transistor assisted ignition system or transistorized ignition system. ‹#›

3. REASON FOR CHOOSING TRANSISTOR IGNITION SYSTEM In conventional ignition systems, the Breaker points burns due to the High current in the circuit. When Engine speed is High, the Breaker opens quickly. Leads to Low Spark Voltage. TRANSISTOR AS A SWITCH ‹#›

4. CONSTRUCTION It consists of: Battery Ignition switch Transistor Contact breaker Ignition coil. Distributor and Spark plugs. ‹#›

5. TYPES There are two types of Transistor Ignition System: Breaker Point Type Magnetic Pulse Type BREAKER POINT TYPE MAGNETIC PULSE TYPE ‹#›

6. WORKING When CB is CLOSED: ‹#›

7. When CB is OPEN: ‹#›

8. ADVANTAGES AND DISADVANTAGES Advantages : It increases the life of contact breaker points. It gives high ignition voltages . It gives longer duration of sparks It has very accurate control of timing. It needs less maintenance. Disadvantages : More mechanical points are needed similar to a conventional system. Cost is high ‹#›

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