Here's why:
* Ignition: Spark plugs are the essential component that ignites the air-fuel mixture in the combustion chamber. This ignition is crucial for the power stroke of the engine cycle.
* Combustion: Without spark plugs, the air-fuel mixture would not ignite, and the engine would not run.
* Alternatives: While spark plugs are the standard, there are alternative methods for igniting the fuel:
* Compression Ignition: This is the principle behind diesel engines, where the heat from the compressed air itself ignites the fuel.
* Glow Plugs: Used in diesel engines for starting in cold weather, these plugs provide initial heat to help the fuel ignite.
Therefore, while there are alternative ignition methods, a traditional petrol engine requires spark plugs for proper operation.
