Fuel injection pump

A fuel injection pump comprising:

• a cylinder;
• a plunger configured to slide along an inner wall of a sliding hole located in the cylinder and to reciprocate between an uppermost point and a lowermost point to pressurize the fuel in a pressurizing chamber placed at an end of the sliding hole at a highest point;
• an intake valve provided at an upstream of the pressurizing chamber and configured to be controlled to open and close;
• and
• an intake passage communicating the intake valve to the pressurizing chamber, wherein
• the plunger is movable downward to cause the pressurizing chamber to inhale the fuel from the intake passage in a fuel suction stroke, and
• the intake passage is communicated to the pressurizing chamber at a lateral side of a plunger axis that is an axis of the plunger in a sliding direction,
• the fuel injection pump further comprising:
• a swirl flow generating part configured to guide the fuel to form a swirl flow around the plunger axis in the fuel suction stroke,
• the intake valve has an intake valve reference axis,
• the intake valve reference axis and the plunger axis reside on a same flat plane, and
• an axis of the intake passage intersects with the intake valve reference axis.