High pressure fuel injection pipe for diesel engine
The invention is to provide a high pressure fuel injection pipe for a diesel engine wherein a fuel, leaked from a seat port is discharged to the outside of a head cover without leaking into the head cover so that a leakage of fuel can be promptly detected and is directed to the high pressure fuel injection pipe formed by abutting and engaging a pressure portion formed on a connecting head of a fuel injection pipe body to a pressure receiving seat portion of a counterpart member so as to provide a firm connection of the fuel injection pipe body to the counterpart member by screwing a fastening nut to press the connecting head to the counterpart member, wherein an annular washer having at least one groove or through hole formed in a radial direction on the circumference of the washer and a seal member is disposed in the vicinity of an outer end portion of a threaded engagement potion defined between the fastening nut and the counterpart member so that a fuel leaked into the inside of the fastening nut from a seat portion defined between the pressure seat portion formed on the connecting head and the pressure receiving seat of the counterpart member may be discharged to the outside through the groove or through hole. Alternatively, the leaked fuel may be discharged to the outside through a through hole which is formed on the fastening nut.
Usui Kokusai Sangyo Kaisha Limited
F F F F
F02M F02M F16L F16L
inventional inventional additional inventional
Nobuo
Kato