Fuel factors and injection pump

When selecting a fuel oil, there are more than ten factors to be considered. Among those which affect combustion are the fuel oil's viscosity, cetane number and calorific value; the sulphur in it and its carbon residues and ash are factors that decide the formation of combustion products ; and the engine's maintenance has a lot to do with its flash and setting points, specific gravity, viscosity, water content and the mechanical impurites in it.

A separate injection pump is provided for each cylinder which operates once every cycle.