Piston for reciprocating within a cylinder in an internal combustion engine

A piston for reciprocating within a cylinder in an internal combustion engine, the piston comprising:

• a piston body having an upper end opposite a lower end, between which a center axis extends,
• wherein the upper end includes an annular top surface that defines an upper plane, the upper end includes a piston bowl that is recessed relative to the upper plane defined by the annular top surface, wherein the piston bowl includes a piston bowl surface having a half section profile that includes:
• a central bottom portion that extends radially at a central slope from the center axis to a first separation cliff, the central slope being negative relative to the center axis;
• wherein the first separation cliff is defined by an intersection of the central bottom portion and a target side wall;
• wherein the target side wall extends between the first separation cliff and a second separation cliff, wherein the target side wall extends at a slope that is different from the central slope, the target side wall is configured to receive fuel from a fuel injector;
• and
• wherein the second separation cliff extends at a slope that is positive relative to the center axis to direct fuel away from the second separation cliff.