PRE-CHAMBER BODY FOR INTERNAL COMBUSTION ENGINES

The present disclosure generally relates to a pre-chamber body (26) for an internal combustion engine (1), and a method for operating the same. The pre-chamber body (26) may comprise a pre-chamber (34), a plurality of flow transfer channels (22) connecting to an exterior of the pre-chamber body (26), a riser channel (38) extending along a longitudinal axis (A) and being fluidly interconnected between the pre-chamber (34) and the plurality of flow transfer channels (22), and at least one annular protrusion (52; 152) projecting from an inner face (37) of the riser channel (38) and/or from an inner face (42) of the pre-chamber (34) and at least partially into the riser channel (38) and/or the pre-chamber (34). The at least one annular protrusion (52; 152) may include a first side face (54; 154) being substantially perpendicular with respect to the longitudinal axis (A).