Cars · Wiring
Spark Plug Technical Reference
An overview of the spark plug function within the combustion cycle and its role in ignition systems.
The spark plug is the critical ignition component that receives electrical energy from the Ignition Coil0 and discharges it across a small gap. This arc ignites the compressed air-fuel mixture within the Combustion Chamber0.
Functionality
- Ignition: The spark plug initiates the combustion process.
- Heat Range: Plugs are rated by their "heat range," which refers to their ability to dissipate heat from the firing tip into the cylinder head. Selecting the appropriate heat range is vital for preventing Pre-Ignition0 in high-performance or forced-induction engines.
Maintaining properly gapped and clean spark plugs is essential for consistent ignition performance and engine longevity.