Ignition system with an ignition spark enlarged by an HF plasma of a spark plug with a prechamber and an associated method

摘要

The invention relates to an ignition system (10) and a method for an externally ignited internal combustion engine (12) with an ignition spark increased by an HF plasma, the external ignition of the fuel being carried out by at least one spark plug (18) assigned to a combustion chamber (16) of the internal combustion engine (12) , 44). According to the invention, the spark plug (18, 44) has a prechamber (18 ', 44') with at least one opening (46, 44'-1) which defines the prechamber (18 ', 44 ') connects to the combustion chamber (16) on the fuel side so that the ignition spark (34) in the prechamber (18', 44 '), into which the high-frequency plasma (36) can be coupled, the plasma-assisted spark ignition of the fuel in the prechamber (18' , 44 ').