Main floor panel for passenger car, has boundary regions and front and rear edge areas made of steel, and center area and intermediate areas made of aluminum alloy, where center area comprises frame tunnel

摘要

The panel (10) has boundary regions (12) and front and rear edge areas made of steel, and a center area (16) and intermediate areas (18) made of aluminum alloy. The center area comprises a frame tunnel (14), where the center area and the intermediate areas are surround by the boundary regions and the front and rear edge areas such that the intermediate areas are surround by a steel frame. The boundary regions, the front and rear edge areas, the center area and the intermediate areas are arranged in an alternating manner.