Patent ID: 7431019

Claim:
A fuel supply device ( 1 ) comprising: a fuel pump ( 6 ); a common rail ( 2 ) which accumulates a high-pressure fuel which is supplied from the fuel pump ( 6 ) under pressure; and a fuel injection valve ( 3 ) which is capable of supplying the high-pressure fuel accumulated in the inside of the common rail ( 2 ) to an internal combustion engine, the fuel pump ( 6 ) including a plurality of high-pressure generating portions ( 61 , 62 , 66 67 ) whose high-pressure-fuel injection timings are shifted from each other, wherein the fuel supply device ( 1 ) includes a plurality of high-pressure pipes ( 11 to 14 ) which are provided corresponding to the plurality of high-pressure generating portions ( 61 , 62 , 66 , 67 ) and connect fuel outlet ports ( 6 P 1 to 6 P 4 ) of the corresponding high-pressure generating portions ( 61 , 62 , 66 , 67 ) with corresponding inlet ports ( 2 P 1 to 2 P 4 ) of the common rail ( 2 ), and a connection pipe ( 30 to 33 ) which connects at least two or more high-pressure pipes ( 11 , 12 , 12 , 13 , 13 , 14 ) out of the plurality of high-pressure pipes ( 11 to 14 ) with each other in the vicinity of the corresponding fuel outlet ports ( 6 P 1 to 6 P 4 ); characterized in that: each of the high-pressure pipes ( 11 to 14 ) is provided between one inlet port ( 2 P 1 to 2 P 4 ) and only one of the outlet ports ( 6 P 1 to 6 P 4 ), wherein each of the high-pressure pipes ( 11 to 14 ) is directly connected to only one high-pressure generating portion ( 61 , 62 , 66 , 67 ) via the corresponding fuel outlet port ( 6 P 1 to 6 P 4 ) and an outlet valve (V 3 , V 4 ) arranged in the fuel pump ( 6 ); and the connection pipe ( 30 to 33 ) is arranged to directly connect the at least two or more high-pressure pipes ( 11 to 14 ) with each other between the both ends of each of the at least two or more high-pressure pipes ( 11 to 14 ).