Patent ID: 6431608
Filing Date: 2002-08-13
Classification: F02M,F16L

Abstract:
A high pressure fuel injection pipe for a diesel engine which is constituted such that an injection pipe body is provided with a connecting head at an end portion thereof and a fastening nut is assembled to the injection pipe body by way of a press member which is disposed behind the connecting head, and a press seat portion formed on the connecting head of the injection pipe body is brought into contact with and is engaged with a pressure receiving seat portion of a counterpart member, and the injection pipe body is connected to the counterpart member by fastening with a pressing force applied to the connecting head due to threaded engagement of the fastening nut with the counterpart member, wherein the improvement is characterized by being constituted such that an annular washer provided with at least one recessed groove or one small hole which extends in the radial direction on a circumference thereof is used as the press member which is interposed between the connecting head of the injection pipe body and the fastening nut, and fuel leaked into the inside of the fastening nut from a seat portion defined between the press seat portion formed on the connecting head and the pressure receiving seat portion of the counterpart member is led to the outside of the fastening nut through the recessed groove or the small hole of the washer.