| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion method for a four cycle reciprocating piston type internal combustion engine enabling accurate control of ignition timing.SOLUTION: In a combustion method in which fuel can be directly introduced inside combustion chambers, at least one gas exchanging valve, at least one inlet valve, and at least one outlet valve for exchanging gas are arranged, the volume of the combustion chambers is minimum at a piston upper dead center, unburned gas is introduced into the combustion chambers in intake strokes, the main injection amount of the fuel is introduced into the combustion chambers during intake strokes and/or compression strokes, the unburned gas and the fuel is compressed in the compression strokes, the mixed gas comprising the unburned gas and the fuel generated in the combustion chambers is ignited, and exhaust gas generated by combustion is expanded and discharged in expansion strokes, the pilot injection amount of the fuel is introduced, the intermediate product of the pilot injection amount of the fuel is generated before introducing the main injection amount of the fuel, and finally the main injection amount of the fuel is introduced so as to perform the controlled ignition of the mixed gas and the additional intermediate product. |
