FUEL INJECTION PUMP HAVING CAVITATION DAMAGE-PREVENTION STRUCTURE

摘要

Disclosed herein is a fuel injection pump having cavitation damage -prevention structure, in which the structure and shape of a deflector (110) and a spill port (120) are improved, thus preventing the spill port and plunger (130) from being damaged due to cavitation. To achieve the above-mentioned purpose, the fuel injection pump of the present invention includes a means for preventing propagation of pressure waves. The propagation preventing means is provided on at least one of the spill port (120) and the deflector (110) such that pressure waves, which are generated when a jet-type cavitation, occurring just after the spill port (120) is opened strikes the spill port (120) or the deflector (110), are prevented from being propagated to cavities that remain around a side surface of the plunger (130).