TWO-CYCLE GAS ENGINE AND FUEL GAS INJECTION SYSTEM FOR TWO-CYCLE GAS ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a two-cycle gas engine capable of suppressing NOx (nitrogen oxide) generation by prompting premixing fuel gas with air.SOLUTION: A two-cycle gas engine comprises: a cylinder 2 and a cylinder head 3; a piston 4; a scavenging port 6; fuel gas injection means 8 injecting fuel gas into a combustion chamber c; and fuel-gas-injection-timing control means 12. The fuel gas injection means 8 includes a first fuel gas injector 8A injecting the fuel gas into the combustion chamber c when the piston 4 is located near a top dead center; and a second fuel gas injector 8B configured separately from the first fuel gas injection chamber 8A and injecting the fuel gas into the combustion chamber c when the piston 4 is located in front of the neighborhoods of the top dead center, and the second fuel gas injector 8B is configured to inject the fuel gas into the combustion chamber c at a lower injection pressure than that of the first fuel gas injector 8A.