FUEL PUMP, FUEL FEED DEVICE

摘要

A fuel pump provided with a drive power transmitting mechanism based on a cylinder type magnet coupling device eliminates the possibility that a magnet adhesively attached to the outer peripheral surface of an inner yoke will scale off under the influence of the fuel. An inner yoke (56) having an inner magnet (561) adhesively attached to the outer peripheral surface thereof is disposed in a region outside a fuel chamber (54), which region is isolated from the fuel chamber (54) by a partition wall (58). An outer yoke (57) having an outer magnet (571) adhesively attached to the inner peripheral surface thereof is disposed in the fuel chamber (54) to which DME fuel is fed. The surface of contact between the inner peripheral surface of the outer yoke (57) disposed in the fuel chamber (54) and the outer magnet (571) adhesively attached to the inner peripheral surface of the outer yoke is subjected to the influence of DME fuel. However, when the rotary drive power is transmitted from the inner yoke (56) to rotate the outer yoke (57), the centrifugal force presses the outer magnet (571) against the inner peripheral surface of the outer yoke (57) for firmer contact therebetween.