answersLogoWhite

0

  • Starters and Ignition Systems
  • VW Golf GTI
  • Ford Expedition XLT

What does an ignition coil do?

User Avatar

Wiki User

βˆ™ 2015-09-15 05:33:25

Best Answer
Copy

Autoshop online

Here is a synopsis of this link.

Coil

The coil is a compact, electrical transformer that boosts the battery's 12 volts to as high as 20,000 volts. The incoming 12 volts of electricity pass through a primary winding of about 200 turns of copper wire that raises the power to about 250 volts. Inside the distributor, this low-voltage circuit is continuously broken by the opening and closing of the points, each interruption causing a breakdown in the coil's electromagnetic field. Each time the field collapses, a surge of electricity passes to a secondary winding made up of more than a mile of hair-like wire twisted into 25,000 turns. At this point, the current is boosted to the high voltage needed for ignition and is then relayed to the rotor.

AnswerSome HEI distributers are known to create as much as 60,000 volts. Hard to imagine. I once had a 75 impala that put that much voltage out. And that was when HEI's were just getting started. But most of them put out about 30 to 40,000 volts.

Ignition coils are very rugged and reliable, but can fail for a variety of reasons. Heat and vibration can damage the coil's windings and insulation causing shorts or opens in the primary or secondary windings. But the number one killer of ignition coils is voltage overload caused by bad spark plugs or plug wires.

===========================================================

The ignition coil is basically a transformer. It converts a low voltage into a high voltage to create a spark at the spark plug.

The way it works may seem backwards, but basically, a low voltage (about 12 volt) electrical current is sent through a coil of wire (the "primary" winding), which causes an electromagnetic field to build up. When this low-voltage electrical is inturrupted (by the points in a conventional distributor, or by the engine's computer), it causes this electromagnetic field to collapse suddenly. As it collapses, it cuts across the windings of a "secondary winding" which is wound around the primary winding. Since the secondary has many more turns of wire than the primary, the magnetic field causes a much higher voltage (anywhere from 5,00 to 20,000 volts) to flow in it. This is the voltage that is sent out through the ignition leads to the spark plugs.

Why do they have it trigger the high voltage when the current is shut off rather than when it's turned on? Because, back when they first started making ignition systems for engines, they used mechanical "points" to switch the voltage on and off. When the points "made" to allow the current to flow, they had a tendency to bounce, causing the voltage to build up erratically. When they were opened, though, the current was shut off very rapidly, giving the sudden change in current flow necessary to create the higher voltage to be induced. Nowadays, with electronic ignition systems, it could be done either way, but they usually stick with the "old" way just because it's what they're used to.

2015-09-15 05:33:25
This answer is:
πŸ€“
🀯
πŸ€”
User Avatar

Your Answer

Loading...

Related Questions

Where is the ignition coil on a 96 civic cx hatchback?

The ignition coil is inside the ignition distributor.


How do you test the ignition coil in a car?

You can test the ignition coil on a car by using a multimeter. A bad ignition coil can be the cause of a car not starting.


Is an ignition module the same as a ignition coil?

No. The coil provides the spark and the module tells the coil when to spark.


How do you replace ignition coil on 1999 Mercury Grand Marquis?

Remove the wiring harness from your 1999 Mercury Grand Marquis ignition coil. Remove the ignition coil retaining screws. Reverse the process to install your new ignition coil.


Where is the ignition coil located in a 1998 tercel?

The 1998 Toyota ignition coil is located on the firewall, in the engine compartment. The ignition coil can be found on the passenger side of the firewall.


How do you change the ignition coil on a 2006 mustang?

V6 Engines * Disconnect the negative battery cable * Disconnect the electrical connector from the ignition coil * Disconnect the spark plug wires from the ignition coil * Remove the ignition coil mounting bolts and remove the coil from the valve cover V8 Engines * Disconnect the negative battery cable * Disconnect the electrical connector from the ignition coil if youre going to remove more then one ignition coil mark each electrical connector with its corresponding coil to prevent mix-ups during reassembly * Remove the ignition coil hold-down bolt * Grasp the ignition coil firmly and pull it straight up


How do you replace a coil on 2003 Chevrolet Express?

REMOVAL PROCEDURE Remove the engine cover. Disconnect the spark plug wires at the ignition coils. Disconnect the ignition coil harness connector. Remove the ignition coil mounting bolts. Remove the ignition coil. INSTALLATION PROCEDURE Install the ignition coil to the bracket. Install the ignition coil mounting bolts. NOTE: Refer to Fastener Notice in Service Precautions. Tighten Tighten the ignition coil mounting bolts to 8 N.m (71 lb in) . Connect the ignition coil harness connector. Connect the spark plug wires at the ignition coils. Install the engine cover.


I have replaced everything involved in my ignition system but still lose spark after driving for a short period of time if you le tit sit for an hour it will restart again any suggestions?

did you have your ignition coil replaced? the signs are that the ignition coil is overheating thus you are able to restart after an hour, when the coil cools. also check if your ignition coil has a resistor. if it has, have it checked for continuity. did you have your ignition coil replaced? the signs are that the ignition coil is overheating thus you are able to restart after an hour, when the coil cools. also check if your ignition coil has a resistor. if it has, have it checked for continuity.


Where is ignition coil located on 1996 Volkswagen?

Where all the wires plug into. That is the ignition coil. The ignition coil is inside the distributor behind the cap. Remove the distributor cap screws, remove the cap and you will see the coil.


Location of ignition coil?

where is the ignition coil on olds 2.3liter 89 cutless vin d


Coil in a sentence?

The ignition coil that is suitable for the hall sensor ignition must have a yellow label.


How do you test ignition coil on your Alero 1999?

1999 Alero how do i test ignition coil pack


Where is the ignition module on a Chevy Caprice ls?

Its right above the ignition coil. Infact you have to remove it first to remove the ignition coil.


How do you hook up the ignition coil on a chev big block?

Bolt The Coil Bracket And Coil To The Block, The - Goes To The Distributor The + Hooks To The Ignition.


How to replace ignition coil in a Ford Focus?

http://www.ehow.com/how_4509339_replace-ignition-coil-pack-ford.html


'Where is ignition coil 2 in a 1995 Nissan Maxima'?

'Where is ignition coil 2 in a 1998 Nissan maxima'?


What is ford 5.8 ignition coil restance?

What is there stance specifications on an ignition coil for a ford 5.8 f250


How do you change an ignition coil on a 97 sonoma?

pull the two bolts buy new or used ignition coil the replace the ignition coil is on th left side of motor right by the tbi


Does your 98 3.2 dodge Intrepid Es has a ignition coil?

The 3.2L has an ignition coil on each spark plug.


Where's the ignition coil in 87 Pontiac grand am?

The ignition coil is down between the firewall and the back of the engine


How do you fix P0352 ignition coil B primary secondary circuit malfunction?

Replace the ignition coil(s).


Where is the ignition coil in a 2002 Toyota Tacoma?

The 2002 Toyota Tacoma ignition coil is located on the firewall in the engine compartment. The coil will be on the drivers side of the firewall.


How do you install ignition coil on 1999 Lexus rx 300?

Each spark plug has it's own ignition coil, they are on the spark plug itself. Unplug the ignition coil connector, remove the bolt holding the coil in place, pull the coil off of the spark plug and out of the valve cover. Install the new coil.


No spark on 73 Chevy pickup?

check your ignition coil, if it's not coming out of there you need to look into a new ignition coil , check ignition circuit next


What is a ignition coil boot and where is it located on the 1986 305 Chevy van?

well it is the bottom that goes on a ignition coil and it is locoed