| 摘要 |
The purpose of the present invention is to suppress cavitation that occurs in a seat surface tip part when a valve body and a seat part collide. In a relief valve of a fuel pump, the point of intersection between the seat surface and a flow channel hole is formed in a position farther from the seat part comprising the seat surface and the valve body when the valve is closed, in order to suppress the occurrence of cavitation bubbles when the valve body is changed to let out high-pressure fuel. |
