PRECHAMBER GAS ENGINE

摘要

The purpose of the invention is to provide a prechamber gas engine such that occurrences of knocking are suppressed, said prechamber gas engine (1) comprising: a cylinder (2); a cylinder head (4); a piston (6) which defines a main combustion chamber (1) with the cylinder head; a prechamber cap (8) with a precombustion chamber (20) defined therein, said prechamber cap having a plurality of injection holes (16) that communicate with the precombustion chamber and the main combustion chamber; an air supply valve (12) for opening and closing an air supply port (13) that is opened on the cylinder head; and an exhaust valve (14) for opening and closing an exhaust port (15) that is opened on the cylinder head. In a plan view as seen from be-low the cylinder head, at least one supply side injection hole (16b) and at least one exhaust side injection hole (16a) are present, and the total injection hole area of the supply side injection holes is larger than the total injection hole area of the exhaust side injection holes.