GAS SUPPLY DEVICE AND OPERATION METHOD FOR GAS ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a gas supply device of a gas engine capable of miniaturizing a gas compressor and reducing its capacity by eliminating possibility of explosion of fuel gas at an outlet of a supercharger completely and reducing power of the gas compressor for compressing fuel gas into an air supply passage per cylinder even when using low calorie gas (gas having low caloric value). SOLUTION: One part of fuel gas is mixed with air at an inlet of the supercharger and this air-fuel mixture is supplied into the supercharger. The other part of fuel gas is mixed with supply air in the air supply passage per cylinder and this air-fuel mixture is supplied into each cylinder of the engine. A supercharger side gas amount adjusting valve for adjusting flow rate of gas in a supercharger side gas supply passage and a cylinder side gas amount adjusting valve for adjusting flow rate of gas in each cylinder side gas supply passage are provided. A gas amount controller for controlling opening of the supercharger side gas amount adjusting valve and adjusting amount of fuel gas into the supercharger side gas supply passage to hold concentration of fuel gas in the air-fuel mixture supplied into the supercharger below flammable lower limit gas concentration is provided. COPYRIGHT: (C)2006,JPO&NCIPI