INTERNAL COMBUSTION ENGINE AND A METHOD FOR OPERATING SUCH AN INTERNAL COMBUSTION ENGINE

Internal combustion engine, preferably a gas engine, comprising a pre-chamber (3) having a pre-chamber intake system (4) and a main combustion chamber (2) having a main combustion chamber intake system (5), wherein by use of the intake systems (4,5) a predetermined amount of energy of fuel can be supplied to the main combustion chamber (2) for a combustion, wherein a control unit (29) is configured to control the intake systems (4,5) according to the following operation modes:- a first operation mode, in which a majority of a fuel energy amount for the combustion in the main combustion chamber (2) is supplied directly to the main combustion chamber (2) by use of the main combustion chamber intake system (5), and- a second operation mode, in which a majority of the fuel energy amount for the combustion in the main combustion chamber (2) is supplied via the pre-chamber (3) to the main combustion chamber (2) by use of the pre-chamber intake system (4).