To maintain a well-balanced aerodynamic characteristic under various kinds of conditions during the traveling of a vehicle.
The air pressure of a pneumatic tire 14 of each of four wheels can be independently adjusted by eight wind directions. In the case of right front wind (a wind direction HSR), for instance, control to relatively raise the air pressure of the pneumatic tire 14 of the left rear wheel, and control to lower the air pressure of the pneumatic tires 14 except the wheel are performed. In the case of left side wind (a wind direction SL), control to relatively raise the air pressure of the pneumatic tires of the right front wheel and right rear wheel, and control to lower the air pressure of the pneumatic tires of the left front wheel and left rear wheel are performed. As a result, the grounding pressure balance of the four wheels on a road surface caused by lift generated by the wind direction, etc. can be stabilized, and vehicle traveling stability can be improved as compared with the air pressure adjustment of the pneumatic tire 14 set in a vehicle stopped state.
ITO MICHIMASA
ICHIKAWA TAKASHIGE
AYABE MASAO
ARAKI MOTOHISA
INAGAKI BUNJI
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda