Abstract: A structure arranged under a floor panel for mounting a tank to be charged with a pressurized-fuel such as natural gas and liquefied petroleum gas in a motorcar of front engine --front drive type is provided. The pressurized-fuel tank installation structure in a motorcar includes a chassis frame formed in a frame-shape for surrounding and supporting the pressurized-fuel tank and attached to a lower surface of the car-body from underside of the floor panel, the pressurized-fuel tank being positioned in the frame-shape and fitted to the chassis frame integrally; a rear wheel suspension provided on the chassis frame; and a pipe arranged along a lower surface of the floor panel for connecting the pressurized-fuel tank and an internal combustion engine with each other.

Abstract: A fuel cylinder for storing a compressed fuel gas is modularized for mounting and supporting the fuel cylinder easily in a motorcar without reconstructing a conventional car-body and necessitating troublesome fuel pipe arranging work after mounting the fuel cylinder. The modularized fuel cylinder comprises a supporting frame fixed to the fuel cylinder, fuel pipes neighboring the fuel cylinder and a joint box on which the fuel pipes concentrate attached to the supporting frame integrally. The fuel cylinder module is detachably fixed to a car-body side supporting frame provided on a rear floor of the motorcar.

Abstract: A fuel cylinder mounting structure of a motorcar wherein a fuel cylinder can be attached together with suspensions and a spare tire easily so that productivity is improved, the vehicle can be made small and light, and reduction of cost can be attempted is provided. The fuel cylinder mounting structure comprises a fuel cylinder for storing compressed fuel gas; a chassis frame having a rectangular frame-like shape, supporting the fuel cylinder and attached to a car-body frame from the bottom; a protection plate fixed to the chassis frame for covering the fuel cylinder from the bottom; suspensions attached to both sides of the chassis frame and modularized with the chassis frame; and a spare tire rack attached under a rear car-body and supporting a spare tire laid down so as to be hung in rear of the protection plate.

Abstract: A fuel cylinder mounting structure in a motorcar wherein a fuel cylinder can be attached together with suspensions and a spare tire easily so that productivity is improved, the vehicle can be made small and light at a reduction of cost. The fuel cylinder mounting structure comprises a fuel cylinder for storing compressed fuel gas; a chassis frame having a rectangular frame-like shape, supporting the fuel cylinder and attached to a car-body frame from the bottom; suspensions attached to both sides of the chassis frame and modularized with the chassis frame; and a spare tire rack attached to the chassis frame and supporting a spare tire laid down and hung under a rear part of the car-body.

Abstract: Disclosed is an automotive floor panel assembly, in which the floor panel assembly is stamp formed into a prescribed shape from at least one piece of sheet metal blank which consists of a first panel section made of sheet metal stock of a first thickness, and a second panel section made of sheet metal stock of a second thickness which are butt welded to each other along opposing edges thereof by using a high energy beam. Because the butt welding is carried out on flat panels, welding quality can be maintained at a high level without any substantial difficulty, and the resulting blank can have a highly uniform finish even though it includes a plurality of parts having different thicknesses. By suitably arranging the various parts having different thicknesses to different parts of the floor panel assembly in an optimum fashion, it is possible to achieve a maximum mechanical strength and a maximum rigidity with a minimum amount of material or involving a minimum weight.

Abstract: A battery box has a center frame extending between two rows of batteries housed in the battery box. The center frame has an array of upwardly projecting locking pins. A central holder bar is installed on the locking pins of the center frame. The battery box also has an inner frame including a left straight frame with locking pins and a right straight frame with locking pins. A left holder bar and a right holder bar are installed respectively on the locking pins of the left straight frame and the right straight frame. The central, left, and right holder bars are fastened in position by nuts that are tightened over the locking pins, thereby holding the batteries firmly in the battery box.

Abstract: A bomb supporting frame for supporting fuel bombs which store pressurized gaseous fuel in an automobile. The bomb supporting frame is fixed on a floor provided on right and left rear side frames of a vehicular body, and simultaneously it is fixed on damper strut mounting portions of right and left rear wheel houses.

Abstract: A laminated material as a damping member welded to a panel of a vehicle body comprises a lower sheet of a foamable mer-sheet, an upper sheet of a non-foamable mer-sheet and an intermediate sheet of a reduced size to be interposed between the upper and lower sheets, wherein the upper and lower sheets are welded together at their peripheral end portions which come into direct contact with each other in laminated state. This structure probilits any irregularities present on the body panel surface from appearing on the upper surface of the laminated material and provides a good damping effect. A method for welding a laminated damping material to a vehicle body panel uses an oven which is used in a coating step of a vehicle body assembly line, dry heat of the oven permitting the layer of a foamable material to get foamed and fluidized when the damping material is passed through the oven the coating step, thus providing a thermal welding between the damping material and the panel.