Methods and systems are provided for increasing an amount of oxygen in a pre-chamber of
a cylinder prior to combustion. In one example, a method may include purging residual …

Methods and systems are provided for an engine having a pre-chamber ignition system. In
one example, a method may include adjusting a valve coupled between a pre-chamber of …

Methods and systems are provided for combusting an air-fuel mixture in a pre-chamber of a
cylinder during an exhaust stroke of the cylinder responsive to fouling of the pre-chamber. In …

Methods and systems are provided for multiplexing ignition signals in an engine system
based on engine operating conditions, each cylinder of the engine system including a main …

Methods and systems are provided for adjusting multiplexed ignition signals in an engine
system based on engine operating conditions, each cylinder of the engine system including …

Methods and systems are provided for operating a cylinder of an engine including a pre-
chamber ignition system. In one example, a method may include determining amounts of pre …

(57) ABSTRACT A spark plug having multiple spark gaps, where at least one of the spark
gaps is located within a prechamber. The spark plug may include a first center wire …

(57) ABSTRACT A multi-cylinder engine includes first and second subsets of cylinders. A
dedicated-cylinder exhaust gas recirculation (EGR) system is associated with the second …

Methods and systems are provided for multiplexing ignition signals in an engine system
based on engine operating conditions, each cylinder of the engine system including a main …

An engine system employs a pre-assembled and/or removable cartridge. In another aspect,
an ignitor, a fuel injector and an air inlet valve are all accessible from a top of a cartridge …