AUXILIARY CHAMBER-TYPE GAS ENGINE

A gas engine is configured to inject a combustion gas from an auxiliary combustion chamber (2) through a plurality of nozzles (9), through which the auxiliary combustion chamber (2) and a main combustion chamber (1) are in communication with each other, so as to ignite a fuel in the main combustion chamber (1). An opening edge, at the auxiliary combustion chamber side, of each of the plurality of nozzles (9) is formed to have a curved surface (11). This structure makes it possible to maintain stable combustion in the main combustion chamber (1) while preventing degradation in combustion performance.