Ignition coil
From Engineering
An ignition coil (also called a spark coil) is an induction coil in an automobile's ignition system.
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[edit] How it works
This specific form of the autotransformer, together with the contact breaker, converts low voltage from a storage battery's 12 volts into thousands of volts, (high voltage) required by spark plugs in an internal combustion engine.
[edit] Improvement
In modern ignition systems each spark plug has its individual coil, sitting right on top of it, in a so called Direct Ignition (DI) module.
[edit] Early history
The disruptive discharge Tesla coil[[1]] is an early predecessor of the "ignition coil" in the ignition system. Tesla also gained Template:US patent, "Electrical Igniter for Gas Engines", on August 16, 1898. It used the principles of the ignition coil used today in automobiles. A. Atwater Kent[[2]], in 1921, patented the modern form of the ignition coil.
[edit] Related coils
- A Oudin coil[[3]] is a disruptive discharge coil.
[edit] Patents
- Template:US patenthttp://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=1391256.WKU.&OS=PN/1391256&RS=PN/1391256File:Igncoil.jpgBosch ignition coil
- Template:US patent - Induction coil structure - Arthur Atwater Kent - 1921
- Template:US patent - Induction coil - Arthur Atwater Kent - 1923
- Template:US patent - Induction coil - Arthur Atwater Kent - 1923
- Template:US patent - Ignition coil - Arthur Atwater Kent - 1926
- Template:US patent - Ignition system - Ernst Alexanderson [[4]]- 1929
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