Abstract: A fuel system component used to supply a fuel to a fuel tank or used to discharge the fuel from the fuel tank comprises a first resin layer; and a second resin layer formed in a similar color to that of the first resin layer and configured to include a welding portion that is welded to the first resin layer and an exposed portion that is not adjacent to or in contact with the first resin layer. A belt-like portion is formed on a first resin layer-side and conically shaped surface of the exposed portion of the second resin layer at a distance from a boundary between the welding portion and the exposed portion and is configured to include at least one of a concavity and a convexity extended intermittently or continuously.

Abstract: A fuel system component used to supply a fuel to a fuel tank or used to discharge the fuel from the fuel tank comprises a first resin layer; and a second resin layer formed in a similar color to that of the first resin layer and configured to include a welding portion that is welded to the first resin layer and an exposed portion that is not adjacent to or in contact with the first resin layer. A belt-like portion is formed on a first resin layer-side surface of the exposed portion to be parallel to a boundary between the welding portion and the exposed portion and is configured to include at least one of a concave and a convex extended intermittently or continuously.

Abstract: The fuel tank unit includes a fuel cutoff valve fastened to a support body. The support body and the casing of the fuel cutoff valve are made of first and second resin materials having different rates of fuel swelling. The fuel cutoff valve is fastened to the support body via a fastening mechanism. The fastening mechanism entails engaging a first support engaging portion and a second support engaging portion of the support body in first and second fastening engaging portions composed of hooks formed on the casing of the fuel cutoff valve, at first and second hook engagement levels that represent the bite of the hooks. The engaging portions are designed such that prior to fuel swelling of the support body and the base cover first hook engagement exceeds second hook engagement, whereas subsequent to fuel swelling second hook engagement exceeds first hook engagement.

Abstract: An electronic control apparatus that performs feedback control on a fuel injection command value to make an air-fuel ratio come to match a target air-fuel ratio increase-corrects an intake air amount and retard-corrects an ignition timing, together with decrease-correcting the fuel injection command value in the feedback control, and then performs an abnormality detection of a fuel system based on a retard-correction amount of the ignition timing at that time.

Abstract: A fuel tank capable of attaching functional parts and tubes in an interior thereof. In a fuel tank for a motor vehicle, which is formed by blow molding for attachment of a built-in part in an interior thereof, and of which an outer wall composed of a synthetic resin has an opening, a functional part adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is attached to the built-in part, a tube adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is connected to the functional part, and a tube connector is attached to an end of the tube. A temporal holding connector is formed integrally with the built-in part, the tube connector is attached to the temporal holding connector, and after blow molding, the tube connector is detached from the temporal holding connector and is attached to a tank cap adapted to close the opening of the fuel tank.

Abstract: The fuel tank unit includes a fuel cutoff valve fastened to a support body. The support body and the casing of the fuel cutoff valve are made of first and second resin materials having different rates of fuel swelling. The fuel cutoff valve is fastened to the support body via a fastening mechanism. The fastening mechanism entails engaging a first support engaging portion and a second support engaging portion of the support body in first and second fastening engaging portions composed of hooks formed on the casing of the fuel cutoff valve, at first and second hook engagement levels that represent the bite of the hooks. The engaging portions are designed such that prior to fuel swelling of the support body and the base cover first hook engagement exceeds second hook engagement, whereas subsequent to fuel swelling second hook engagement exceeds first hook engagement.

Abstract: A fuel tank capable of attaching functional parts and tubes in an interior thereof. In a fuel tank for a motor vehicle, which is formed by blow molding for attachment of a built-in part in an interior thereof, and of which an outer wall composed of a synthetic resin has an opening, a functional part adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is attached to the built-in part, a tube adapted to discharge fluid from the interior of the fuel tank or feed fluid therein is connected to the functional part, and a tube connector is attached to an end of the tube. A temporal holding connector is formed integrally with the built-in part, the tube connector is attached to the temporal holding connector, and after blow molding, the tube connector is detached from the temporal holding connector and is attached to a tank cap adapted to close the opening of the fuel tank.