Abstract: System and methods for operating a vehicle that includes a boosted engine are described. In one example, a spark plug may be adjusted between two operating states to reduce a possibility of pre-ignition and spark plug fouling. A first operating state may be conducive to operating the engine at light loads. The first operating state may be conducive to operating the engine at higher loads.

Abstract: System and methods for operating a vehicle that includes a boosted engine are described. In one example, a spark plug may be adjusted between two operating states to reduce a possibility of pre-ignition and spark plug fouling. A first operating state may be conducive to operating the engine at light loads. The first operating state may be conducive to operating the engine at higher loads.

Abstract: Methods and systems are provided for a pre-chamber. In one example, a system includes a pre-chamber and a piston arranged in a combustion chamber. The piston and/or combustion chamber comprise one or more features configured to force squish flow into the pre-chamber.

Abstract: System and methods for operating a vehicle that includes a boosted engine are described. In one example, a spark plug may be adjusted between two operating states to reduce a possibility of pre-ignition and spark plug fouling. A first operating state may be conducive to operating the engine at light loads. The first operating state may be conducive to operating the engine at higher loads.

Abstract: Systems and methods are provided for a variable volume pre-chamber igniter, which may be coupled in an engine system. In one example, a system may include a pre-chamber igniter coupled to a cylinder of an engine, the pre-chamber igniter including a movable cap enclosing an internal volume of the pre-chamber igniter and separating the internal volume of the pre-chamber igniter from an internal volume of the cylinder. By adjusting a position of the cap, the internal volume of the pre-chamber igniter may be adjusted to provide reliable ignition to the cylinder across a wide range of operating conditions.

Abstract: Systems and methods are provided for a variable volume pre-chamber igniter, which may be coupled in an engine system. In one example, a method may include adjusting an internal volume of a pre-chamber igniter based on operating conditions by adjusting a position of a cap of the pre-chamber igniter, the pre-chamber igniter including a plurality of orifices fluidically coupling the pre-chamber igniter to a main combustion chamber of a cylinder of an engine. By adjusting a position of the cap, the internal volume of the pre-chamber igniter may be increased or decreased to provide reliable ignition to the cylinder across a wide range of operating conditions.