METHOD FOR OPERATING A SPARK IGNITED ENGINE

摘要

The present invention relates to an operation method of a spark ignition engine, which has: at least one cylinder; a piston which is movable in the cylinder; and at least one precombustion chamber which is connected with the at least one cylinder. The method comprises: a step of forming a combustible mixture by evenly mixing first fuel with air and leading the mixture into at least one cylinder; a step of compressing the combustible mixture with the piston through a compression stroke; a step of generating an air supply to the precombustion chamber by leading second fuel having a same or different chemical composition and/or concentration about the first fuel to the precombustion chamber in an intake period before combustion starts; and a step of igniting a spark in the air supply of the precombustion chamber. The present invention: monitors the emission of at least one cylinder, caused by combustion, and/or the mechanical stress of the at least one cylinder; changes the chemical composition and/or quantity of second fuel, flowing into the precombustion chamber, and/or the temperature and/or spark time of the air supply of the cylinder for each cylinder; and has emission and/or mechanical stress reduced below a threshold value which is set individually.