How Battery Ignition System Works | Automobile Engineering

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this is an accurate description of the ignition system, at least for all I have ever studied it over the years. Reading comments proved entertaining and as usual I come away realizing this subject, though pretty straight forward, causes more confusion than any other topic of automotive mechanics. For the record to those with other ideas, the condenser is not providing just an "extra" benefit of preventing points arcing, it is essential in so doing. A system will run without a condenser but the performance will be erratic with secondary voltage values wandering all over the place and the points will be a real lightning show. The points do not hold up to this. The condenser is an electrical storage device, pure and simple, where it is used and how it is used determines what it actually accomplishes. In this case the condenser is a remote storage device to accumulate/absorb electrical charge when the points open, if it is not there then the primary coil winding voltage will back feed to ground or some other lower voltage circuit, hence the points burning. As the points open and the coil primary field collapses the condenser assures that all the power stored up in the primary is retained in order to follow through to the secondary coil circuit. This happens because the condenser is blocking the backward flow of electricity from the primary winding of the coil due to it having higher voltage than the collapsing coil primary field. When the coil primary field discharges to a certain level of voltage the condenser then releases its charge into the coil to finish the job of secondary voltage generation, kind of a boost so to speak. So in this particular installation the condenser is acting as a storage device and a resistor to prevent backflow of electricity. And it is worth noting that this video is talking about a resistor in the coil, not referencing the ballast resistor in the ignition primary circuit. So there are then two resistors, one in the coil to protect coil overload and the ballast or nichrome wire ignition resistor that is there to keep the voltage to the points low enough to prevent points burnout. The ignition resistor it is in circuit when normal ignition is in effect but it is bypassed when the circuit is in the starting mode in order to achieve a higher starting secondary voltage.

Thank you very much .you help my with your videos to fix my car. apricieted Happy Thank's Given....

Though ur theory part was taken from Ganesan book but the way of explaining it with such a good fig which is not in the book, helped me to understand it very clearly. Thank u very much.

Very brilliant Explanation Sir..i really got a working and function of each of parts of battery ignition system..

wonderful explanation....

Very clear and important video.Thanks very much!

The best explanation I have seen. Thank you

its helpful to every one, some more mechanic videos???

One of the most useful video for me... Good job team..👍👍

Very Nice Work .. Thanks

Very well explained. Thanks!

THanks for making this video.. I Hope you can make a lot of video about a Automotive..

Nice , god bless you

Very well explained , Nice. One quick question what will happen to other devices if battery is low and still if we try to give ignition continuously

Tank you good work i like.

thank you very much it helps me a lot.

VERY HELPFULL.. THANK YOU SO MUCH .. KEEP UP THIS GOOD WORK..

Amazing illustration there!

As per usual, the writers of auto-ignition systems make the same mistake regarding the purpose of the capacitor across the points. Its initial purpose is to provide a RAPID collapse of the back EMF of the collapsing field, by providing a capacitor this enables the current to be quickly absorbed. The explanation is this.....the rule of induction is, that the faster the field collapses the higher the output voltage will be, THE MAIN PURPOSE OF THE CAPACITOR IS to quickly assist the field's collapse. The fact that this capacitor also HAPPENS to sufficiently reduce the erosion of the points is just a lucky coincidence. Remove the capacitor and the ignition fails to provide sufficient spark to run the engine.