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Ignition coil

An ignition coil is an induction coil in an automobile Automobile

An automobile is a wheel [i]ed passenger [i] vehicle [i] that carries its own motor [i]. ... 

's ignition system Ignition system

The ignition system of an internal-combustion engine [i] is an important part of the overall engine syst ... 

 which transforms Transformer

A transformer is an electrical device that transfers energy from one circuit [i] to a ... 

 a storage battery's 12 volt Volt

The volt is the SI [i] derived unit [i] of electric potential difference [i] or electromotive force [i] ... 

s to the thousands of volts needed to spark the spark plug Spark plug

A spark plug is an electrical device that fits into the cylinder head [i] of some internal combustion engine [i] ... 

s. This specific form of the autotransformer Autotransformer

An autotransformer is an electrical transformer [i] with only one winding [i]. ... 

, together with the contact breaker Contact breaker

A contact breaker is a type of electrical switch [i], and the term typically refers to the switching dev ... 

, converts low voltage from a battery into the high voltage High voltage

The term high voltage characterizes electrical circuits, in which the voltage used is the cause of parti... 

 required by spark plugs in an internal combustion engine Internal combustion engine

The internal combustion engine is a heat engine [i] in which the burning of a fuel [i] occurs ... 

. In modern ignition systems, the ignition distributor is omitted and ignition is instead electronically controlled. Firing voltage is achieved either by using individual coils placed on top of the spark plug ', or through a "waste spark" system, in which two spark plugs share the same coil, causing both to fire simultaneously - the fuel in the cylinder that is nearing the end of its compression stroke

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Encyclopedia


An ignition coil is an induction coil in an automobile Automobile

An automobile is a wheel [i]ed passenger [i] vehicle [i] that carries its own motor [i]. ... 

's ignition system Ignition system

The ignition system of an internal-combustion engine [i] is an important part of the overall engine syst ... 

 which transforms Transformer

A transformer is an electrical device that transfers energy from one circuit [i] to a ... 

 a storage battery's 12 volt Volt

The volt is the SI [i] derived unit [i] of electric potential difference [i] or electromotive force [i] ... 

s to the thousands of volts needed to spark the spark plug Spark plug

A spark plug is an electrical device that fits into the cylinder head [i] of some internal combustion engine [i] ... 

s.

This specific form of the autotransformer Autotransformer

An autotransformer is an electrical transformer [i] with only one winding [i]. ... 

, together with the contact breaker Contact breaker

A contact breaker is a type of electrical switch [i], and the term typically refers to the switching dev ... 

, converts low voltage from a battery into the high voltage High voltage

The term high voltage characterizes electrical circuits, in which the voltage used is the cause of parti... 

 required by spark plugs in an internal combustion engine Internal combustion engine

The internal combustion engine is a heat engine [i] in which the burning of a fuel [i] occurs ... 

.

In modern ignition systems, the ignition distributor is omitted and ignition is instead electronically controlled. Firing voltage is achieved either by using individual coils placed on top of the spark plug ', or through a "waste spark" system, in which two spark plugs share the same coil, causing both to fire simultaneously - the fuel in the cylinder that is nearing the end of its compression stroke is ignited, whereas the spark in its companion that is nearing the end of its exhaust stroke has no effect. The waste spark system is more reliable than a single coil system with a distributor, and cheaper than coil-on-plug.

The disruptive discharge Tesla coil Tesla coil

A Tesla coil is a category of disruptive discharge [i] transformer [i] coils, named after their inventor ... 

 is an early predecessor of the "ignition coil" in the ignition system. Tesla also gained , "Electrical Igniter for Gas Engines", on August 16, 1898. It used the principles of the ignition coil used today in automobiles. A. Atwater Kent, in 1921, patented the modern form of the ignition coil.

Related coils

  • An Oudin coil is a disruptive discharge coil.

Patents

- Induction coil structure - Arthur Atwater Kent - 1921
- Induction coil - Arthur Atwater Kent - 1923
- Induction coil - Arthur Atwater Kent - 1923
- Ignition coil - Arthur Atwater Kent - 1926
- Ignition system - Ernst Alexanderson - 1929

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