| 摘要 |
<p>To provide a fuel injection pump which can sufficiently and stably supply fuel to a fuel pressurization chamber during a fuel intake stroke, a plunger chamber (23), a spill port (29) and a spill passage (33) are mutually communicable, while a reflux passage (34), an intake gallery (15), an intake passage (31), an intake port (27) and the plunger chamber (23) are mutually communicable. A reflux passage (34) communicates with a damping chamber (35) through a communication passage (35a). The spill passage (33) and the reflux passage (34) communicate with each other, and when a spill valve (40) opens, high-pressure fuel within the plunger chamber (23) spills from the spill valve (40) and into the intake gallery (15) through the reflux passage (34), causing pulsation having a pressure level difference to the spill fuel. When the pulsation wave passes through the damping chamber (35), as the level difference in the pulsation wave is reduced, a sufficient quantity of fuel can stably be supplied from the intake gallery (15) to the plunger chamber (23). <IMAGE></p> |
