| 摘要 |
PROBLEM TO BE SOLVED: To provide a vehicle substructure capable of stabilizing the fluid flow under a vehicle body floor. SOLUTION: The vehicle substructure has a rectifying fin that is attached under a floor of a vehicle body and rectifies the flow of fluid under the floor of the vehicle body. The rectifying fin is an airfoil fin 10 that has a blade thickness in a right-to-left direction of the vehicle. In particular, the airfoil fin 10 is provided on a rear part under the floor of the vehicle body having the round-up angle (preferably, 4-6°). Preferably, in the shape of the airfoil fin 10, the maximum blade thickness ratio is 8-17%, and the position of the maximum blade thickness is 30-35%. COPYRIGHT: (C)2009,JPO&INPIT
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