Patent ID: 6796764
Filing Date: 2004-09-28
Classification: F02C,F04D

Abstract:
A turbine fuel pump, comprising:i) a casing for casing therein an electric motor; ii) a pump housing disposed at the casing, the pump housing being formed with an intake port and a delivery port for respectively taking in and delivering fuel, the pump housing including a fuel passage between the intake port and the delivery port, the fuel passage including a flow path defining a cross section S; and iii) an impeller rotatably disposed in the pump housing, the impeller having an outer periphery formed with a vane which force feeds the fuel in the fuel passage of the pump housing when the impeller is rotated with the electric motor, the impeller being surrounded by the flow path, the vane of the impeller defining a height H and a thickness T; wherein the fuel passage defines a following typical dimension Rm, with respect to the cross section S of the flow path relative to the height H of the vane and the thickness T of the vane: Rm=S/(2H+T), and wherein a wall of the flow path defining the cross section S is profiled by a profile length Lp, the profile length Lp divided by the typical dimension Rm making a dimension ratio Lp/Rm in a first range from 11 to 16.