Pre-chamber arrangement for a gas engine and a gas engine

A pre-chamber arrangement for a gas engine, the arrangement comprising:

• a pre-chamber body accommodating a volume;
• and
• an inlet passage with an inlet port, for supplying a gaseous medium into the pre-chamber volume;
• wherein the pre-chamber volume extends in a longitudinal direction between a top end and a bottom end, wherein the pre-chamber volume is configured to accommodate an end of a spark plug at the top end and wherein, at the bottom end, the pre-chamber body comprises openings for allowing gas to flow between the pre-chamber volume and a main combustion chamber of the gas engine;
• the inlet port is positioned, at a distance from the top end of the pre-chamber volume, in the longitudinal direction, such that a volume of residual gases is trapped at the top end of the pre-chamber volume and surrounds the end of the spark plug when the gaseous medium is supplied into the pre-chamber volume during an intake stroke;
• and
• wherein at least an end portion of the inlet passage follows a contour of an interior surface of the pre-chamber body, wherein the end portion of the inlet passage and the inlet port are directed at least partly downwards into the pre-chamber volume.