Gas supply device for gas engine and gas engine provided with the gas supply device

摘要

PPROBLEM TO BE SOLVED: To reduce energy loss for fuel gas compression by eliminating the need for a gas compressor dedicated for fuel gas compression. PSOLUTION: In a gas engine, an exhaust turbocharger includes a fuel gas supercharger equipped with a fuel gas compressor for compressing the fuel gas and a first turbine for driving the fuel gas compressor by energy of exhaust gas, and an air supercharger equipped with an air compressor for compressing air and a second turbine for driving the air compressor by the energy of the exhaust gas. The fuel gas compressed by the fuel gas supercharger and the air compressed by the air supercharger are mixed, and the mixture is supplied to respective cylinders. The first turbine of the fuel gas supercharger and the second turbine of the air supercharger are connected in series to an exhaust passage. Exhaust gas generated after driving either the first turbine or the second turbine is used for driving the other turbine, or the first turbine and the second turbine are unified. PCOPYRIGHT: (C)2011,JPO&INPIT