A rotary engine includes an insert having a pilot subchamber defined therein and communicating with the internal cavity of the engine. A pilot fuel injector has a tip in communication with the pilot subchamber. An ignition element extends into an element cavity defined through the insert adjacent the pilot subchamber. The element cavity is in communication with the pilot subchamber through a communication opening defined in the insert between the element cavity and the pilot subchamber. The communication opening is smaller than a portion of the ignition element adjacent the communication opening such as to prevent the portion of the ignition element from completely passing through the communication opening upon breaking off of the portion of the ignition element from a remainder of the ignition element. An outer body for a rotary engine and a method of combusting fuel in a rotary engine are also provided.

The invention concerns a method of operating a compression ignition engine (10) fuelled with a combination of a hydrocarbon fuel and hydrogen. The method comprises: during a cold start, fuelling the engine with the hydrocarbon fuel alone, or with the hydrocarbon fuel and a reduced proportion of hydrogen compared with warm miming conditions, and increasing the proportion of hydrogen used to fuel the engine as it warms up whilst running.

The invention concerns a method of operating a compression ignition engine (10) fuelled with a combination of a hydrocarbon fuel and hydrogen. The method comprises: during a cold start, fuelling the engine with the hydrocarbon fuel alone, or with the hydrocarbon fuel and a reduced proportion of hydrogen compared with warm miming conditions, and increasing the proportion of hydrogen used to fuel the engine as it warms up whilst running.

An igniter (09) includes an elongated tubular housing (10) with a polygonal top (14) having a central aperture (16) defined therein, communicating into a central chamber (20) along a longitudinal axis to an end at a base (18). A terminal (13a) projects from the polygonal top (14). A channel (11a) along a longitudinal axis is formed within the housing (10) in which is mounted an insulator (15). At least a portion of the insulator (15) may extend from the base (18). An electrode (13) connected to the terminal (13a) or (13b) is embedded within the insulator (15), to an end in the base (18). Prongs (19) extend from the electrode (13) towards the outer periphery of the housing (10) or towards the central chamber (20). The prongs (19) end in proximity to the outer housing wall (11), or the inner housing wall (12). The prongs (19) may be one or more projections and have sharp edges for multiple and increased spark presentations. A ring (30) may be connected to the electrode (13), defining a heating element in the base (18). Electrical resistance of the igniter (09) is selected.

An igniter (09) includes an elongated tubular housing (10) with a polygonal top (14) having a central aperture (16) defined therein, communicating into a central chamber (20) along a longitudinal axis to an end at a base (18). A terminal (13a) projects from the polygonal top (14). A channel (11a) along a longitudinal axis is formed within the housing (10) in which is mounted an insulator (15). At least a portion of the insulator (15) may extend from the base (18). An electrode (13) connected to the terminal (13a) or (13b) is embedded within the insulator (15), to an end in the base (18). Prongs (19) extend from the electrode (13) towards the outer periphery of the housing (10) or towards the central chamber (20). The prongs (19) end in proximity to the outer housing wall (11), or the inner housing wall (12). The prongs (19) may be one or more projections and have sharp edges for multiple and increased spark presentations. A ring (30) may be connected to the electrode (13), defining a heating element in the base (18). Electrical resistance of the igniter (09) is selected.

Apparatuses, systems and method for utilizing multi-zoned combustion chambers (and/or multiple combustion chambers) for achieving compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in an internal combustion engine are provided. In addition, improved apparatuses, systems and methods for achieving and/or controlling compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in a Siamese cylinder internal combustion engine are provided.

The present disclosure relates to a method for operating a combustion engine. A main amount of gas fuel is fed via a pre-chamber into a main combustion chamber. An ignition quantity of gas fuel is fed into the pre-chamber before the piston reaches the upper dead center to form an air-gas fuel mixture in the pre-chamber, which is fatter than in the main combustion chamber. The air-gas fuel mixture in the pre-chamber ignites itself. The air-gas fuel mixture in the main combustion chamber ignites through the self-ignited air-gas fuel mixture in the pre-chamber.

The present disclosure relates to a method for operating a combustion engine. A main amount of gas fuel is fed via a pre-chamber into a main combustion chamber. An ignition quantity of gas fuel is fed into the pre-chamber before the piston reaches the upper dead center to form an air-gas fuel mixture in the pre-chamber, which is fatter than in the main combustion chamber. The air-gas fuel mixture in the pre-chamber ignites itself. The air-gas fuel mixture in the main combustion chamber ignites through the self-ignited air-gas fuel mixture in the pre-chamber.

Apparatuses, systems and method for utilizing multi-zoned combustion chambers (and/or multiple combustion chambers) for achieving compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in an internal combustion engine are provided. In addition, improved apparatuses, systems and methods for achieving and/or controlling compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in a Siamese cylinder internal combustion engine are provided.

There is disclosed an igniter for a gas turbine engine including: a base; a glow plug heater rod extending from the base along an axis and terminating in a rod end; and a fuel receiver adjacent the heater rod, the fuel receiver including a portion located closest to the heater rod, the rod end protruding axially relative to the axis from the fuel receiver portion located closest to the heater rod.