Abstract
Our turbulent combustion model, which has a method providing turbulence distribution in an engine cylinder using random digits, is able to simulate combustion cycle-by-cycle variations in gasoline engines. However, fluctuations of injected fuel amount and fuel distribution in cylinders were not considered. So a multi-zone combustion model had been developed, and how the fuel distribution in a cylinder effects the cycle-by-cycle variations was investigated using it. Eventually, it is able to be concluded with some calculation results that the fluctuations of fuel distribution in a cylinder and injected fuel amount show some characteristic effects on the cycle-by-cycle variations, but they don’t have any significant effects to induce fast combustion and knocking. The details of the multi-zone combustion model are also described in this paper.
