Importance

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Abstract

A communication port opens at a shifted position of a fuel passage that is positionally shifted from an inside residual pressure holding valve toward an outside residual pressure holding valve. The fuel passage includes an outside passage part through which the fuel to be discharged into an internal-combustion engine flows from the communication port toward the outside residual pressure holding valve, and an inside passage part that throttles a flow of fuel flowing from the communication port toward the inside residual pressure holding valve more than the outside passage part. When a passage cross-sectional area of the inside passage part is converted into a passage cross-sectional area of a circular pipe, D which is a passage diameter of the circular pipe, and L which is a length of the inside passage part satisfy a relational expression of L/D≧3.

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First Claim