| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion control method and a combustion control device in a gas engine capable of obtaining stable ignition combustion in all operating ranges of the engine, when gas having a low calorific value is used as main fuel gas and even when fuel properties of the main fuel gas change depending on time; capable of controlling supply of auxiliary fuel gas having a high calorific value by following the change in the calorific value of the main fuel gas; and capable of realizing stable ignition combustion without being affected by even the case where the calorific value of the main fuel gas is small or the calorific value is changed. SOLUTION: This gas engine is constituted so as to mix main fuel gas supplied through a main fuel gas passage with air, introduce supply air comprising the air-fuel mixture to a main combustion chamber of the engine through an air supply passage, and perform ignition combustion of the main fuel gas by injecting ignition flame generated inside an auxiliary chamber into inside of the main combustion chamber. The ignition flame is generated by continuously supplying auxiliary fuel gas whose calorific value is larger than that of the main fuel gas to inside of the auxiliary chamber. COPYRIGHT: (C)2005,JPO&NCIPI
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