PURPOSE: To ensure driving stability even at a decreased air pressure in a tire while turning by arranging a tire air pressure detecting means which detecting each air pressure in the tires of front and rear wheels, and a wheel load changing means which changes the wheel load of a given wheel through a wheel load adjusting mechanism according to detected air pressure.
CONSTITUTION: Tire air pressure P1 - P4 and lateral G are read by respective tire air pressure sensors 27 - 30 and a lateral acceleration (lateral G) sensor 31, and as turning driving when lateral G is beyond prescribed level G0, the wheel loads of right and left rear wheels are relocated so that the wheel load of a rear outer wheel may increase with the decrease in the air pressure of a front wheel tire if at least either of air pressure P1 or P2 of a right or left front wheel tire is under an abnormal condition of air pressure in the front wheel tire. When both air pressure P1 and P2 are beyond a prescribed level and air pressure P3 or P4 in a right or left rear wheel tire is under an abnormal condition of air pressure in a rear wheel tire which is below the prescribed level, the wheel loads of right and left front wheels are relocated so that the wheel load of a front outer wheel may increase with the decrease in the air pressure of a rear wheel. This makes a correction so that the steering characteristics of a vehicle may be neutralized.
SUGASAWA FUKASHI
IMAZEKI TAKASHI
YAMAMURA TOSHIHIRO
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