Systems and methods for ignition coil multiplexing in a pre-chamber system

A method, comprising:

• determining actuation timings of a first ignition coil and a second ignition coil based on engine operating conditions, the first ignition coil coupled to a pre-chamber spark plug of a first engine cylinder and a main chamber spark plug of a second engine cylinder and the second ignition coil coupled to a main chamber spark plug of the first engine cylinder and a pre-chamber spark plug of a second engine cylinder;
• actuating the first ignition coil and the second ignition coil at the determined actuation timings;
• and
• adjusting a pre-chamber fuel amount based on the determined actuation timing.

A system, comprising:

• an engine including a plurality of cylinders, each cylinder including a pre-chamber, the pre-chamber including a pre-chamber spark plug directly coupled thereto, and further including a main chamber spark plug directly coupled to the cylinder;
• an ignition system including a plurality of ignition coils, the plurality of ignition coils including a first ignition coil electrically coupled to the main chamber spark plug of a first cylinder and to the pre-chamber spark plug of a second cylinder and a second ignition coil electrically coupled to the main chamber spark plug of the second cylinder and the pre-chamber spark plug of the first cylinder;
• and
• a controller storing executable instructions in non-transitory memory that, when executed, cause the controller to:
• select between operating in a first ignition mode, a second ignition mode, and a third ignition mode based on engine operating conditions, the first ignition mode including providing ignition via the main chamber spark plug only, the second ignition mode including providing ignition via the pre-chamber spark plug only, and the third ignition mode including providing ignition via both the main chamber spark plug and the pre-chamber spark plug.