Abstract: An insert ring is mounted on a resin-made fuel tank body, the insert ring has seat surfaces for mounting a fuel pump thereon and boss holes formed in the seat surfaces. An insert molded body is formed by insert molding of the insert ring using a first resin material while leaving the boss holes and the seat surfaces exposed. The insert molded body is inserted into an outer surface of the fuel tank body by insert molding using a second resin material which forms the fuel tank body.

Abstract: A fuel pump attachment structure includes a pump support member and a cover member. The pump support member has a fuel pump support surface via which a fuel pump is to be attached to a fuel tank inside the fuel tank made of second resin. The pump support member includes an insert plate and an insert nut. The cover member is made of first resin and provided on the fuel pump support surface of the pump support member.

Abstract: A resin-made fuel tank structure of a vehicle is provided to suppress the formation of a notch in a mounting portion of an insert portion on a tank body. The fuel tank structure includes a tank body. The tank body includes a resin material having fuel permeation resistance. The fuel tank structure includes an insert portion separate from the tank body. The insert portion includes a resin material. The insert portion also includes a mounting portion to mount the insert portion on the tank body and a fuel fill opening. The insert portion is configured to be mounted to an outer layer of the tank body. The outer layer of the tank body is configured to be in close contact with an end portion of the mounting portion of the insert portion. The outer layer is configured to bulge more outward and upward than the mounting portion.

Abstract: A resin-made fuel tank structure of a vehicle is provided to suppress the formation of a notch in a mounting portion of an insert portion on a tank body. The fuel tank structure includes a tank body. The tank body includes a resin material having fuel permeation resistance. The fuel tank structure includes an insert portion separate from the tank body. The insert portion includes a resin material. The insert portion also includes a mounting portion to mount the insert portion on the tank body and a fuel fill opening. The insert portion is configured to be mounted to an outer layer of the tank body. The outer layer of the tank body is configured to be in close contact with an end portion of the mounting portion of the insert portion. The outer layer is configured to bulge more outward and upward than the mounting portion.

Abstract: A fuel pump attachment structure includes a pump support member and a cover member. The pump support member has a fuel pump support surface via which a fuel pump is to be attached to a fuel tank inside the fuel tank made of second resin. The pump support member includes an insert plate and an insert nut. The cover member is made of first resin and provided on the fuel pump support surface of the pump support member.