Intake and fuel/air mixing system for multi-cylinder, externally ignited internal combustion engines

Process to operate an intake and fuel/air mixing system for multi-cylinder, forced ignited internal combustion engines with at least two inlet valves per cylinder, at least two separate intake pipe arms per cylinder connected to the inlet valves, wherein:

• first intake pipe arms per cylinder are combined into a first group and other intake pipe arms per cylinder are combined into at least one other group, each group having one throttling member, where the first group exhibits a common fuel injection into the intake system, and one injection each is connected to the individual intake pipe arms of the at least one other group, the spatial distances between the fuel injector and the inlet valves in the first group being larger than in the at least one other group, and the throttling members are controlled in such a manner that for low air flow rates the first group opens first and the at least one other group is opened as a function of the speed and load with higher air flow rates.