VEHICULAR LOWER VEHICLE BODY STRUCTURE

• Main Authors: UEDA SOHEI, NAGASHIMA YUKI, IGUCHI YASUKI
• Format: Patent
• Language: English; Japanese
• Published: 16.09.2021
• Subjects: LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MOTOR VEHICLES; PERFORMING OPERATIONS; TRAILERS; TRANSPORTING

To improve the aerodynamic performance by suppressing occurence of a vortex flow at the rear side of a front wheel under a floor.SOLUTION: A pair of right and left front side floor under covers 19a is provided which extends in the back-and-forth direction at the back side from the position of a front wheel 12 in the vehicle back-and-forth direction, and which forms a part of the lower surface of a vehicle body. A protrusion 61 which extends in the vehicle back-and-forth direction and which protrudes downwardly is formed at a position that divides a region straight-backwardly relative to the front wheel 12, and a rear region located inwardly in the vehicle widthwise direction relative to the front wheel 12 in each front side floor under cover 19a. The protrusion 61 is caused to function as a divider for a slow running wind B that flows straight-backwardly from the front wheel 12 and a fast running wind A that flows along each front side floor under cover 19a, thereby suppressing occurrence of a vortex flow that deteriorates the aerodynamic performance.SELECTED DRAWING: Figure 6 【課題】フロア下の前輪の後方における渦の発生を抑制して空力性能を向上させる。【解決手段】前輪１２の位置より車両前後方向後方において前後方向に延びて車体の下面の一部を構成する左右一対の前側フロアアンダーカバー１９ａを備える。前側フロアアンダーカバー１９ａにおける、前輪１２の真っすぐ後方の領域と前輪１２より車幅方向内側における後方領域とを区分する位置に、車両前後方向に延びて下方に突出する突設部６１を形成する。突設部６１を前輪１２の真っすぐ後方を流れる速度の遅い走行風Ｂと、前側フロアアンダーカバー１９ａに沿って流れる速度の速い走行風Ａとの仕切りとして機能させて、空力性能を悪化させる渦の発生を抑制する。【選択図】図６