Spark plug
part · 1902 · Electric age
Ignites the mixture with an electric spark (Bosch).
Principles and materials it uses
- Electric arc — uses. A spark is an electric discharge.
- Porcelain — is made of. The insulator is ceramic.
- Nickel — is made of. The electrodes are a nickel alloy.
Where it is used
- Internal combustion engine — is part of. A petrol engine ignites the mixture with a spark plug.