What are the requirements of ignition system?

It should be light, effective and reliable in service. It should have source of electrical energy. A method of producing high voltage from the source to produce a spark across the electrodes of the spark plug and yet limit the current flow to increase the life of spark plug.

What is transistor ignition system?

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. Hence, this system is known as Transistorassisted ignition system or transistorized ignition system. …

How a transistor works ignition system?

The transistor is an electronic switch with no moving parts. It uses a very small anount of current to trigger a much larger charge. In most transistorized ignition systems, the breaker points are inserted in a control circuit, while the coil is connected to a power circuit.

What is the operating principle of an ignition coil?

The basic principle of an ignition coil To produce the required high voltages, ignition coils make use of the relationships that exist between electricity and magnetism. When an electric current flows through an electrical conductor such as a coil of wire, it creates a magnetic field around the coil (Figure 2).

What are the functions of ignition system?

An ignition system for a multicylinder internal combustion engine has three basic functions: (1) to provide a sufficiently energetic spark to initiate the burning of the fuel-air mixture within each cylinder; (2) to control spark timing for optimum efficiency so that cylinder pressure reaches its maximum value shortly …

What is difference between CDI TCI?

Difference between TCI and CDI : CDI Ignition makes the spark by discharging a capacitor loaded with high voltage about 200 to 450 volt from the ignition coil by using an SCR known Thyristor while TCI Ignition charges the coil with the current before the spark is done. Spark is done when the current is cut suddenly.

Which is best TCI or CDI?

Difference between TCI and CDI : CDI coils have low impedance and inductance is about XL< 1 ohm and can reach high RPM makes high power and short sparks while TCI coils have high impedance is about XL >1 ohm and can reach lower RPM thus spark duration may be longer.

What gives power to the ignition coil?

The battery provides low voltage electricity to the ignition coil. That moves other distributor parts that cause the ignition coil to pulse, and sends the electricity down each spark plug wire in order.

What are the two types of ignition systems?


  • Conventional breaker-point ignition (in use since the early 1900s)
  • Electronic ignition (popular since the early 1970s)
  • Distributorless ignition (introduced in the mid-1980s)

What are the 4 types of ignition system?

Currently, we recognize four types of ignition systems used in most cars and trucks: conventional breaker-point ignitions, high energy (electronic) ignitions, distributor-less (waste spark) ignition and coil-on-plug ignitions.

What are the five basic functions of an ignition system?

The basic components in the ignition system are a storage battery, an induction coil, a device to produce timed high-voltage discharges from the induction coil, a distributor, and a set of spark plugs.

How is a transistor used in an ignition system?

So in conclusion, the transistor can be used in the ignition system because of its characteristics that can disconnect and connect lines quickly. To control the performance of the transistor, we need one additional sensor, the pick up coil. This sensor will send a low-voltage current with pauses according to the ignition timming at the base foot.

How is the performance of the transistor controlled?

To control the performance of the transistor, we need one additional sensor, the pick up coil. This sensor will send a low-voltage current with pauses according to the ignition timming at the base foot. So that the transistor performance will be matched with the engine RPM.

What kind of coil does a TCI ignition system use?

Ignition FAQ. TCI collapses an already charged coil by disconnecting it (TCI switches off briefly). These systems generally use a higher resistance type coil and are known as an “induction” or “Kettering” ignition systems.

How does CAM work in a transistorized ignition system?

While the rotor is made of metal which is able to be attracted by magnets. Cam on the rotor serves to shorten the gap between the rotor with a permanent magnet. This changing gap causes the current in the pickup coil to be zig-zag.