| 摘要 |
<p>PROBLEM TO BE SOLVED: To identify an abnormal portion when an abnormality occurs in a combustion state of an internal combustion engine, in a combustion system for the internal combustion engine having fuel supply parts of two systems for gas fuel and for liquid fuel.SOLUTION: A control part 80 executes first determination processing for determining whether a combustion state of an engine 10 is normal or abnormal during an operation execution period of the engine 10 by combustion of one fuel on the basis of a combustion parameter during the period. After the determination of the combustion state through the first determination processing, the control part executes second determination processing for determining whether or not the combustion state of the engine 10 is normal or abnormal during an operation execution period of the engine 10 by combustion of the other fuel on the basis of a combustion parameter during the period, after fuel to be used is switched from one fuel to the other fuel. When at least either one of the first determination processing or the second determination processing determines that the engine combustion state is abnormal, an abnormal portion is identified based on a determination result obtained by the first determination processing and a determination result obtained by the second determination processing.</p> |
