| 摘要 |
PROBLEM TO BE SOLVED: To increase an output without generation of knocking. SOLUTION: CO2 from a CO2 supply pipe 11 is joined with fuel gas supplied through a fuel gas supply pipe 7, and CO2 is mixed with the fuel gas. In the point of time intensity of knocking measured by a knocking sensor 5 exceeds a permissible range while increasing an output by a main controller 19, CO2 mixing ratio is increased by a CO2 supply controller 18. Thereafter, in the point of time intensity of the knocking is ceased within the permissible range, by stopping an increase of the CO2 mixing ratio or by lowering down it, the optimum CO2 mixing ratio is determined.
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