| 摘要 |
PROBLEM TO BE SOLVED: To optimize exhaust emission control in resuming combustion from a combustion pause state, in a case of using gas fuel.SOLUTION: An engine 10 has a first injection valve 21 injecting gas fuel, and an ignition plug 20 generating ignition spark in a combustion chamber. A catalyst 19 for exhaust emission control is provided in an exhaust pipe 17. A control unit 80 stops fuel injection on the basis of the success or failure of a predetermined execution condition, and executes pause of combustion in the engine 10. Also, after starting of combustion pause, the control unit 80 executes injection of gas fuel with the first injection valve 21 in a state where ignition with the ignition plug 20 is stopped before resumption of combustion. |
