| 摘要 |
PROBLEM TO BE SOLVED: To provide a high pressure fuel injection pipe which can be used as a high pressure fuel injection pipe for a cylinder injection type gasoline engine having an injection pressure of 4 to 20 MPa, is sufficiently durable for low grade gasoline, sour gasoline, DME (dimethyl ether), alcohol, alcohol mixed fuel, etc., and has an outside diameter of around 6.35 mm, an inside diameter of 2.95 to 4.35 mm, and a wall thickness of 1.0 to 1.7 mm. SOLUTION: The high pressure fuel injection pipe is manufactured by overlapping and drawing an outer pipe 2 made of an electroseamed pipe or a seamless pipe and an inner pipe 1 made of an electroseamed pipe having a coating film of Ni or a Ni alloy so as to make them close contact with each other. COPYRIGHT: (C)2006,JPO&NCIPI
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