Patent ID: 6904894
Filing Date: 2005-06-14
Classification: F02M

Abstract:
1. In a pulsation reducing system for a fuel line of an electronic fuel injection type engine comprising a fuel delivery rail for supplying fuel to fuel injectors, a fuel tank, and a longitudinal main fuel pipe for connecting the fuel tank to the fuel delivery rail, said pulsation reducing system comprising: a first flexible tube is arranged between said fuel delivery rail and said main fuel pipe, a second flexible tube is arranged between said main fuel pipe and said fuel tank, and a small-ID tubular portion arranged within said first tube or near a connecting portion of said first tube, the inside diameter of said small-ID tubular portion is smaller than that of said main fuel pipe, the length of said small-ID tubular portion is set between 10 to 50 times the inside diameter of the small-ID tubular portion itself, whereby standing waves and resultant pressure pulsations caused by said fuel delivery rail are reduced by said small-ID tubular portion.