| 摘要 |
<p>A high-pressure fuel pump (10) includes a plunger (11), a pump housing (12), an intake valve (13), a discharge passage (14), a fuel seal member (18), and a fuel inlet conduit (34). The pump housing (12) includes a fuel pressurizing chamber (23), an intake passage (24a), a discharge passage (24b), a cylinder housing member (21), a cover member (31) that covers the cylinder housing member (21), and an intake gallery chamber (12g). The fuel inlet conduit (34) is connected to the cover member (31) and configured to introduce fuel into the intake gallery chamber (12g) from outside the cover member (31). The pump housing (12) includes a return passage (33e) that communicates the intake gallery chamber (12g) with a space surrounded by the plunger (11), the cylinder housing member (21), and the fuel seal member (18). A first end portion of the return passage (33e) on the intake gallery chamber (12g) side is positioned on an opposite side of the cylinder housing member (21) from the fuel inlet conduit (34).</p> |
