Patent ID: 7146968

Claim:
An in-line type fuel supply device in a fuel injection device, in which fuel in a fuel tank is increased in pressure by a fuel pump provided at the outside of the fuel tank and the fuel increased in pressure is supplied toward a fuel injection valve in the fuel injection device, wherein a pump housing case body is formed with a bottomed cup shaped first case body and a bottomed cup shaped second case body; wherein a fuel pump is held by a first support member and a second support member, where the first support member faces to a lower bottom portion of the first case body, and the second support member faces to an upper bottom portion of the second case body, and the fuel pump is supported in such manner as having a cylindrical space at the pump housing case body; wherein a pump intake passage of the fuel pump is formed with the lower bottom portion of the first case body and the first support member, and provided in a fuel flow-in chamber, in which a fuel flow-in passage is opened, through a strainer; wherein a pump discharge passage of the fuel pump is inserted and provided in a discharge passage inserting hole provided at the second support member and connected to a fuel discharge passage, which is opened from the second case body to the outside; wherein a vapor discharge passage and a relief passage are opened in the cylindrical space, in which the vapor discharge passage is formed at the second case body, one end of the vapor discharge passage is opened toward the outside, the relief passage is formed at the second support member, and one end of the relief passage is opened toward the discharge passage inserting hole; and wherein a relief valve is provided at the relief passage, so as to open the relief passage toward the cylindrical space when a pressure in the discharge passage inserting hole including the fuel discharge passage is more than a fixed pressure.