High pressure fuel supply device having plating layer and manufacturing method thereof

A manufacturing method of a high pressure fuel supply device, to which an external fuel pipe is joined, the method comprising:

• forming an axial hole, a branched hole and a chamfered section in a bar member, wherein:
• the axial hole extends in an axial direction of the bar member;
• the branched hole fluidly communicates between the axial hole and an outside of the bar member;
• and
• the chamfered section is formed in a connection between the axial hole and the branched hole;
• forming a connecting portion and a sealing portion in the bar member, wherein:
• the connecting portion is formed to join with the external fuel pipe in such a manner that the fuel pipe is securely held by the connecting portion and is fluidly communicated with the branched hole;
• and
• the sealing portion is formed adjacent to the connecting portion to fluid-tightly engage with the fuel pipe;
• installing a removable sealing member in the bar member in such a manner that the sealing member engages the connecting portion and the sealing portion to fluid-tightly separate the axial hole and the branched hole from the connecting portion and the sealing portion;
• and
• forming a plated part, which includes a plating layer, along a wall surface of the axial hole, a wall surface of the branched hole and a wall surface of the chamfered section.

A manufacturing method of a high pressure fuel supply device, to which an external fuel pipe is joined, the method comprising:

• forming an axial hole, a branched hole and a chamfered section in a bar member, wherein:
• the axial hole extends in an axial direction of the bar member;
• the branched hole fluidly communicates between the axial hole and an outside of the bar member;
• and
• the chamfered section is formed in a connection between the axial hole and the branched hole;
• forming a plated part, which includes a plating layer, along a wall surface of the axial hole, a wall surface of the branched hole and a wall surface of the chamfered section;
• and
• forming a connecting portion and a sealing portion in the bar member that includes the plated part, wherein:
• the connecting portion is formed to join with the external fuel pipe in such a manner that the fuel pipe is securely held by the connecting portion and is fluidly communicated with the branched hole;
• and
• the sealing portion is formed adjacent to the connecting portion to fluid-tightly engage with the fuel pipe.