| 摘要 |
The controller ( 41 ) selects premixed combustion or diffusive combustion of the diesel engine ( 1 ) based on the running state detected by a sensor ( 33, 34 ) (S 4 , S 5 ). The controller ( 41 ) calculates the target oxygen concentration and the target oxygen amount of the intake gas for the selected combustion type. When premixed combustion is selected, the controller ( 41 ) preferentially controls the oxygen concentration of the intake gas to the target value. When diffusive combustion is selected, the controller ( 41 ) preferentially controls the oxygen amount of the intake gas to the target value. By immediately shifting the target values according to the combustion type without setting transitional target values, increase of noxious substances in the exhaust gas due to the shift of combustion type can be prevented. |
