FUEL DELIVERY PIPE

摘要

A fuel delivery pipe capable of reducing a pressure pulsation when fuel is injected from an injection nozzle, preventing vibration and noise from under-floor piping, and reducing radiant sound from a fuel delivery body, wherein a flexible absorbing wall surface (10) installed on the wall surface of the fuel delivery body (1) is deformed by a variation in internal pressure to increase the inside volume of the fuel delivery body (1), alphaL/√V determined by the sound velocity alphaL of the fuel flowing through the fuel delivery body (1) and the inside volume V of the fuel delivery body (1) is 20 x 10<3> (m<-0.5>.sec<-1>) <= ALPHAL/√V <= 85 X 10<3> (m<-0.5>.sec<-1>) and the ratio alphaL/alphaH of the sound velocity alphaL of the fuel to an equivalent sound velocity alphaH in a high frequency area is alphaL/alphaH <= 0.7, and the sectional shape of the fuel delivery body (1) in a direction perpendicular to the axis thereof is formed in a generally mortar shape, generally flask shape, generally trapezoidal shape, generally key shape, or generally goggle shape.