VEHICULAR AERODYNAMIC DEVICE

PROBLEM TO BE SOLVED: To provide a vehicular aerodynamic device capable of enhancing the braking property and the steerability without impairing the appearance quality of a vehicle. SOLUTION: In a front bumper 16 of a vehicle 12, a recess 30 is formed in a corner part 20, the recess is closed by a lid member, and the recess and the inside of a wheel house 24 are communicated with each other via a communication pipe 38 having a solenoid valve 40. A controller 42 closes the recess by the lid member by turning off the solenoid valve to prevent an opening of the recess from appearing on the surface of the vehicle, and turns on the solenoid valve when detecting by a brake switch 50 that a vehicle is braked. Thus, the lid member is turned by the negative pressure generated in the wheel house in a vehicle traveling state, and operated as an aero-brake with an inner surface of the recess being an aero-kick surface. Further, when the turning operation of the vehicle is detected by a steering angle sensor 48, the solenoid valve on the turning direction side is turned on to generate the yawing moment to direct the vehicle in the turning direction. COPYRIGHT: (C)2009,JPO&INPIT