METHOD FOR COATING INSIDE OF INJECTION HOLE OF FUEL INJECTION NOZZLE

摘要

PROBLEM TO BE SOLVED: To provide a method for coating the inside of an injection hole of a fuel injection nozzle capable of sufficiently and evenly coating the inside of the injection hole and of being adopted to a narrow injection hole.;SOLUTION: The method for coating the inside of the injection hole 14 of the fuel injection nozzle 1 includes a tubular member butting process butting a tubular body tip part 31 of a tubular body 3 on a seat surface 12, a dipping process dipping a nozzle tip part 100 of the nozzle 1 into coating liquid 2 and filling the injection hole 14 with coating liquid 2, a suction process sucking coating liquid 2 to make the same flow into the tubular body 3 through the injection hole 14 from an outside under a condition where the inside of the injection hole 14 is filled with the coating fluid 2, a pressure feeding process pressure-feeding the sucked coating liquid 2 to discharge the same to the outside through the inside of the injection hole 14 from an inside of the tubular body 3, and a coating process making coating by drying and baking coating liquid 2 applied on the inside of the injection hole 14 after releasing a butting state of the tubular body tip part 31 and the seat surface 12.;COPYRIGHT: (C)2009,JPO&INPIT