Prechamber spark plug with improved cap

A prechamber spark plug, comprising:

• a housing;
• and
• a cap arranged at a combustion-chamber end of the prechamber spark plug, wherein the cap has, on a combustion-chamber side, a recess in an outer side;
• wherein the cap has an asymmetric configuration for providing individual adaptation of the prechamber spark plug for optimized flow control,
• wherein the cap has, on a combustion-chamber side, the recess, which is a trough-shaped recess, in an outer side, wherein the recess has a geometric shape of part of the surface of a sphere,
• wherein a first passage opening opens into the recess, wherein the first passage opening has a linear configuration and has a midline, which is arranged at a first angle to a center axis of the prechamber spark plug,
• wherein a second passage opening has a second midline, which is arranged at a second angle to the center axis of the prechamber spark plug, wherein the second angle is greater than the first angle, wherein the cap has a concave inner side, so that the second passage opening opens into a concave area of the concave inner side, wherein at least a portion of the concave inner side is above at least a portion of the trough-shaped recess, and wherein the first passage opening and the second passage opening do not cross the center axis,
• wherein a shape of the cap is asymmetric with respect to the center axis, and
• wherein the recess is asymmetric with respect to the center axis.