Predictive model-based spark control

A prechamber for use in generating laminar flow in one or more electrode gaps, comprising:

• an external surface and an internal surface enclosing a prechamber volume;
• a spark-gap electrode assembly, comprising:
• a primary electrode disposed within the prechamber volume;
• and
• one or more ground electrodes disposed within the prechamber volume and offset from the primary electrode to form one or more electrode gaps;
• one or more rotational ports communicating between the external surface and the internal surface for introducing a fuel-air mixture into the prechamber volume and including a port axis that defines an index angle and a rotational offset and a penetration angle for creating a spiral flow in the prechamber volume;
• and
• one or more scavenging ports communicating between a main combustion chamber and the prechamber volume and located between the one or more rotational ports and the spark-gap electrode assembly to generate a radial flow in the prechamber;
• wherein the combination of the spiral flow and the radial flow generates a flow substantially orthogonal to the one or more electrode gaps to achieve a consistent laminar flow in the electrode gaps.

A prechamber for use in generating laminar flow in one or more electrode gaps, comprising:

• an external surface and an internal surface enclosing a prechamber volume;
• a first spark-gap electrode assembly, comprising:
• a first primary electrode disposed within the prechamber volume;
• and
• a first ground electrode disposed within the prechamber volume and offset from the first primary electrode to form a first electrode gap;
• one or more rotational ports communicating between the external surface and the internal surface for introducing a fuel-air mixture into the prechamber volume and including a port axis that defines an index angle and a rotational offset and a penetration angle for creating a spiral flow in the prechamber volume;
• and
• a first scavenging port communicating between a main combustion chamber and the prechamber volume and located between the one or more rotational ports and the first electrode gap to generate a first radial flow in the prechamber;
• wherein the combination of the spiral flow and the first radial flow generates a first combined flow substantially orthogonal to the first electrode gap to achieve a consistent laminar flow in the first electrode gap.