Comparison of gasolines with different distillation curves: effect of the temperature on a GDI spray opening angle

A GDI multihole injector was used to investigate the effect of the fuel composition and temperature on the spray angle. Three pure mono-component fuels, and six different kinds of gasoline were tested in a quiescent bomb. The injector and the fuel were heated-up at at different temperatures ranging from 20 to 120 °C. Back light photography was used to capture still images of the spray from which geometrical parameter of the spray image could be extracted. The spray spreading, its initial and far field angles could be compared to infer information on the effect of the fuel composition on the spray macroscopic parameters.