Y-shaped high pressure fuel feed pump assembly

A Y-shaped high pressure fuel feed pump assembly comprises a pump body, a plurality of oil pumping systems and a cam shaft used for driving the oil pumping systems. The improvement of the Y-shaped high pressure fuel feed pump assembly is that the number of the oil pumping systems is three, and the three oil pumping systems are distributed in the peripheral direction of the cam shaft; in the process that the cam shaft rotates for a circle, the three oil pumping systems are driven sequentially. The Y-shaped high pressure fuel feed pump assembly has the advantages that the pump body is small in size, low in weight and low in requirement for a driving device.