Pre-ignition prevention using ion sense detection of exhaust stroke heat release for dual spark plug engines

A pre-ignition prevention method for a turbulent jet ignition (TJI) engine having dual spark plugs, the pre-ignition prevention method comprising:

• generating, by an ion sensing system, an ion sense signal indicative ion flow between electrodes of each of first and second spark plugs of the TJI engine, the first and second spark plugs being associated with a pre-chamber and a main chamber, respectively, of a cylinder of the TJI engine;
• receiving, by a controller of the TJI engine, the ion sense signal from the ion sensing system;
• detecting, by the controller and using the ion sense signal, a misfire event where a firing of the first spark plug fails to completely combust a fuel/air pre-charge in the pre-chamber;
• in response to detecting the misfire event, detecting, by the controller and using the ion sense signal, an exhaust stroke heat release event after a firing of the second spark plug indicative of a remaining portion of a primary fuel/air charge in the main chamber;
• and
• in response to detecting the exhaust stroke heat release event, adjusting, by the controller, fueling for at least one subsequent combustion cycle to prevent pre-ignition of the remaining portion of the primary fuel/air charge in the main chamber.