Patent ID: 6767179
Filing Date: 2004-07-27
Classification: F02M,F04D

Abstract:
A turbine type fuel pump comprising:a disc shape impeller having one and opposite side faces, the impeller being provided with blades, blade grooves, and an annular portion formed on an outer periphery side of the blade grooves, the blades and the blade grooves being formed alternately in a circumferential direction on the one and opposite side faces at an outer periphery portion of the impeller, the blade grooves extending from the one side face being isolated from the blade grooves extending from the opposite side face; and a pump housing which rotatably houses the impeller therein, the pump housing having generally C-shaped side grooves on one and the opposite side in communication with the blade grooves on one and the opposite side respectively, the side grooves on one and the opposite side having start end and terminal end portions on one and the opposite side respectively, a fuel suction port communicating with the start end portion on one side, and a fuel discharge port communicating with the terminal end portion on the opposite side, wherein, both front and rear wall surfaces of each of the blades are inclined backward with respect to a rotational direction thereof in an axial direction of the impeller from each of the one and opposite side faces to make acute angles thereto, and, further, wherein, by rotation of the impeller, fuel is circulated independently between the side grooves on one and the opposite side and the blade grooves on one and the opposite side to increase the fuel pressure.