The ignition coil is an increasing transformer that converts the low voltage voltage from the battery or the generator to the high voltage, which is used for the fuel-air mixture. Origin of the ignition coil
Origin of the ignition coil
The modern car coil of ignition is nothing more than an induction coil of engineer Heinrich Rumkorf, patented back in 1851. The induction coil of Rumkorf may have formed an arc of up to 30 centimeters long. The invention was so successful that, in 1858, Rumkorf won Napoleon III prize of 50,000 francs, with the words "for the most important discoveries in the field of electricity".
Ignition coil
The ignition coil is an increasing DC voltage transformer. Its task is to generate a high voltage current that is necessary for the fuel-air mixture. The generator or battery pack enters the primary coil of the coil. The wrap is typically made up of 100-150 wickets made of copper wire, which is relatively large in diameter. The coils are farmed to two low voltage pins on the cover of the coil, and 12 volts are applied to the coils. In the secondary loop, from 15 to 30 thousand wickets of more thin copper wire.
High voltage of the coil does not kill, but it will be very appreciable
The difference in the thickness of wire and the number of wets in the secondary coils is a high pulse voltage (25.000-35.000 Volt). Secondary winding is inside the wrap of the primary contour. One secondary circuit contact is connected to a negative primary circuit contact and the second contact is placed on the central clamp in the coil cover. This output is for high voltage current transmission, which leads to a high voltage wire, the other end of which is connected to the central contact in the ignition switch. To increase the magnetic field force, both winding are mounted around an iron core, which is placed in a special casing with an insulating lid. To optimize the work and to avoid overheating the coil is filled with transformer oil.
Working principle of the ignition coil
The working principle of the coil is based on the formation of high voltage secondary winding current during the primary winding of low voltage current. The resulting magnetic field in the secondary coils gives rise to current high voltage current. At a time when sparks are required, the contacts in the ignition circuit breaker are blurred. At the same time, the chain of primary coil is broken. The high voltage current comes to the central contact of the ignition coil and goes further to the contact in the lid to which the joker's electrode is currently located. The spark shall be transmitted and the impulse is transmitted to the spark plug of one of the cylinders.
It is not recommended to include the ignition for a long time without starting the engine. Ignition coil "does not like" long term load
Due to the low reliability of the ignition dispensers in modern cars, systems with individual coils of ignition are used for each individual spark plug. This increases the energy of sparkless and reduces the level of radio interference that the ignition system generates. In addition, the individual coil scheme has eliminated the use of unreliable high-voltage wires.
Characteristics of the ignition coil
The ignition coils are most often misfiring due to overheating in the engine compartment, water intrusion into and inside the shell, and for a number of other reasons. Significantly reduces the coil resources of the coil without starting the engine.
To increase the length of service, it is desirable from time to time to clean the ignition coils of dirt and dust, to check the reliability of the attachment of low-and especially high-voltage wires.
The two main enemies of the ignition coil are overheating and corrosion. Microscopic cracks are formed due to overheating
In spite of the highest voltage, the high voltage of the coil is harmless to the human being, as the sparks are characterized by a relatively low current. However, when passing through the arm, the electrical shock will be strong enough to disconnect the high voltage wires when the engine is running.
Interesting facts about the ignition coil
Often, the owners of older vehicles encounter "electrocuting" from the driver's door or other element of the body they are concerned with when they exit or enter the passenger compartment. The cause of this phenomenon can be microfractures in the case of one of the ignition cases through which the high voltage leakage occurs.
