Various embodiments relate to application of a fluid to a substrate. To achieve this result, a vertically jogging motion of a sheet tray is generated from a mechanical combination of an eccentric pulley assembly driven by a DC motor and a slotted ring comprising a slotted bore affixed to the sheet tray of the jogger. A cetane number of the fuel is estimated using a plurality of conversion tables for converting the ignition delay correction amount to the cetane number of the fuel. Thus, the route which is preferred by manually configuring in advance will be chosen.