Back محرك إشعال بالشمعة Arabic داگیرساندنی بزوێنەر-بە پریشکە CKB Motor de encendido por chispa Spanish موتور اشتعال جرقهای Persian Inneall spréachadhainte Irish Motore ad accensione comandata Italian 火花点火内燃機関 Japanese Motor cu aprindere prin scânteie Romanian Motore a allughidura cumandada SC 火花點火 Chinese
A spark-ignition engine (SI engine) is an internal combustion engine, generally a petrol engine, where the combustion process of the air-fuel mixture is ignited by a spark from a spark plug. This is in contrast to compression-ignition engines, typically diesel engines, where the heat generated from compression together with the injection of fuel is enough to initiate the combustion process, without needing any external spark.