Abstract: There are provided a cowl provided to support a front windshield in an inclined state where a rear side of the front windshield is located at a higher level than a front side of the front windshield and forming a lower edge of an opening portion for arranging the front windshield and a bonnet provided in front of and above the cowl. An upper portion of the cowl comprises a first face portion to which the front windshield adheres and an inclined second face portion which extends obliquely rearwardly-and-downwardly from the first face portion, and a front end of the first face portion is positioned on a rearward side, in a vehicle longitudinal direction, of a rear end of the bonnet.

Abstract: There are provided a cowl provided to support a front windshield in an inclined state where a rear side of the front windshield is located at a higher level than a front side of the front windshield and forming a lower edge of an opening portion for arranging the front windshield and a bonnet provided in front of and above the cowl. An upper portion of the cowl comprises a first face portion to which the front windshield adheres and an inclined second face portion which extends obliquely rearwardly-and-downwardly from the first face portion, and a front end of the first face portion is positioned on a rearward side, in a vehicle longitudinal direction, of a rear end of the bonnet.

Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.

Abstract: A floor is partitioned into a plurality of areas S1 to S4 by a floor tunnel portion 11, side frames 13, side sills 12, and cross members 7, 8, 15, and 16, and the rigidity of the floor panels of the areas S1 to S3 is adjusted by rigidity adjustment portions 20, 21, 22, 23, and 25. These floor panels are set such that their natural frequency in a 2×1 mode, in which two antinodes are generated in the length direction of the automobile and one antinode is generated in the width direction of the automobile, is 240 to 260 Hz. Thus, a reduction in road noise due to automobile tire cavity resonance is achieved.