Patent ID: 8160775
Filing Date: 2012-04-17
Classification: B60G,B60T,B62D

Abstract:
1. A wheel attitude control method for controlling an attitude of a wheel when braking a vehicle by imparting a braking force to the wheel attached to the vehicle, the method comprising the steps of: chronologically obtaining acceleration data in a radial direction of a tire at a center position of a tire tread and at an off-center position spaced apart from the center position toward a shoulder on a vehicle inner side of the tire; imparting the braking force to the wheels attached to the vehicle; obtaining respective contact lengths at the center position and the off-center position until a speed of the wheel detected by a wheel speed sensor is lowered to a given value from the braking force imparted to the wheel based on a leading edge peak value V calculating a difference or a ratio between the obtained contact length at the center position and the obtained contact length at the off-center position, comparing the calculated difference with a pre-set first threshold value or comparing the calculated ratio with a pre-set second threshold value, and controlling a wheel attitude, which varies in accordance with changes in a load applied to the wheel, based on the calculated difference or the calculated ratio in contact length when the calculated difference exceeds the first threshold value or the calculated ratio exceeds the second threshold so that a contact patch shape of the tire is caused to approximate a contact patch shape at the time of imparting no braking force, until the speed of the wheel detected by the wheel speed sensor is lowered to the given value.