ignition coil
LowTechnical / Automotive
Definition
Meaning
A transformer in an internal combustion engine that converts the battery's low voltage to the high voltage needed to create a spark in the spark plugs to ignite the fuel.
More broadly, any coil or transformer used to produce a high-voltage spark from a low-voltage source in an ignition system. In a figurative sense, it can refer to a catalyst or starting mechanism for a process.
Linguistics
Semantic Notes
A compound noun. Always refers to a specific, physical component within the broader 'ignition system'. Its function is critical but singular.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The component is identically named in both varieties.
Connotations
Purely technical; no differential connotations.
Frequency
Equally low-frequency in both dialects, used almost exclusively in automotive/mechanical contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
The [ADJ] ignition coil [VERB]...to [VERB] the ignition coil on/in the [NOUN]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms for this technical term]”
Usage
Context Usage
Business
In the context of automotive parts supply, retail, and logistics.
Academic
In engineering and automotive technology textbooks and papers on internal combustion engines.
Everyday
When discussing car troubles with a mechanic or another driver.
Technical
In repair manuals, diagnostic procedures, and engineering specifications.
Examples
By Part of Speech
verb
British English
- [Not applicable as a verb]
American English
- [Not applicable as a verb]
adverb
British English
- [Not applicable as an adverb]
American English
- [Not applicable as an adverb]
adjective
British English
- [Not commonly used as an adjective. The noun is used attributively: e.g., ignition coil failure]
American English
- [Not commonly used as an adjective. The noun is used attributively: e.g., ignition coil replacement]
Examples
By CEFR Level
- The car won't start; maybe the ignition coil is broken.
- The mechanic said the rough idling was caused by a failing ignition coil.
- After diagnosing the misfire, I used a multimeter to test the resistance of the ignition coil's windings.
- Contemporary direct-ignition systems have obviated the traditional distributor by employing a dedicated ignition coil for each spark plug.
Learning
Memory Aids
Mnemonic
Think: IGNITION starts the engine, and a COIL is a loop of wire. The IGNITION COIL is the looped-wire part that gives the spark to start the ignition.
Conceptual Metaphor
THE HEART OF THE SPARK: The ignition coil is often metaphorically described as the 'heart' that delivers the essential 'spark of life' to the engine.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Direct calque 'катушка зажигания' is correct and standard.
- Do not confuse with 'свеча зажигания' (spark plug), which is the recipient of the coil's high voltage.
Common Mistakes
- Pronouncing 'ignition' as /ɪgˈnaɪ.ʃən/ (incorrect stress and vowel).
- Omitting the second 'i' in spelling: 'ignition coil'.
- Using plural 'coils' when referring to a single unit in a multi-coil system (a 'coil pack' is more precise).
Practice
Quiz
What is the primary function of an ignition coil?
FAQ
Frequently Asked Questions
It may run poorly with misfires, reduced power, and poor fuel economy, or it may not start at all.
No. The ignition coil creates the high-voltage electricity, and the spark plug uses that voltage to create the actual spark inside the cylinder.
It varies. Older cars often have one coil serving all plugs via a distributor. Modern cars typically have one coil per spark plug (coil-on-plug).
Common causes include heat, vibration, age, moisture, and faults in connected components like worn spark plugs.