Disclosed are a flash memory unit and a method of programming a flash memory device. The grounding clip has two regions of upwardly and downwardly extending protrusions and a through-hole disposed between the two regions. The ECU calculates the actual amount Qpl of the pilot fuel injection from the magnitude P and pressure Pc in the high pressure fuel pipe based on the relationship between Qpl and P, Pc determined beforehand by experiment. The fitting projection is positioned between the facing inclined faces of an adjacent pair of engaging elements of a mating surface fastener upon engagement of the engaging elements each other and has inclined faces, which are fit with and abut against both inclined faces, so that it is possible to prevent the stagger upon engagement. Junctions of the source and drain zones are beneath each.