| 摘要 |
The present invention relates to a high-pressure fuel pump comprising a pressurizing chamber (11) for pressurizing fuel, an outlet valve (8) for discharging the fuel pressurized in the pressurizing chamber (11) to an outlet passage (12), a relief passage (110,100A) for connecting the outlet passage (12) located downstream of the outlet valve (8) and the pressurizing chamber (11) with each other while bypassing the outlet valve (8). A relief valve device (100) is provided in the relief passage (110,100A) and adapted to open when an internal pressure of the outlet passage (12) becomes higher than that of the pressurizing chamber (11), thereby providing communication between the outlet passage (12) and the pressurizing chamber (11). The relief valve (102) includes a relief spring mechanism for pressing a relief valve (102) to a relief valve seat (101). At least the relief spring mechanism among members of the relief valve device (100) is provided outside the pressurizing chamber (11) in the pump body (1). |
