| 摘要 |
PROBLEM TO BE SOLVED: To provide a 2-cycle gas engine that suppresses generation of NOx (nitrogen oxides), by promoting premixing of fuel gas with air.SOLUTION: A 2-cycle gas engine includes: a cylinder 2; a cylinder head 3; a piston 4 that demarcates a combustion chamber c between a circumferential wall 2a of the cylinder 2 and the cylinder head 3; a fuel gas injection means 8 that injects fuel gas 8a, 8b to the combustion chamber c; an ignition means 10 that ignites the fuel gas within the combustion chamber; a scavenging port 6 that supplies air to the combustion chamber c when the piston 4 is positioned in the vicinity of the bottom dead center; a fuel gas injection timing control means 12 that is configured to inject the fuel gas 8b by means of the fuel gas injection means 8 when the piston 4 is in an up stroke and the piston 4 is positioned 10° to 100° before the top dead center, and furthermore to inject the fuel gas 8a by means of the fuel gas injection means 8 when the piston 4 is positioned in the vicinity of the top dead center; and an ignition timing control means 12 that ignites the fuel gas within the combustion chamber c by means of the ignition means 10 when the piston 4 is positioned in the vicinity of the top dead center. |
