| 摘要 |
PURPOSE:To measure the cornering powers Cf and Cr of front wheels and rear wheels simply and highly reliably, by detecting a forward speed, a lateral speed, a yaw angle speed, a front wheel steering angle, a front wheel load, and a rear wheel load of a vehicle, and performing computation in accordance with specified expressions by a computing means. CONSTITUTION:The following values are detected by respective sensors: a front wheel steering angle deltaf, a forward speed U, a lateral speed V, a yaw angle speed gamma, a front wheel load Wf, and a rear wheel load Wr. The results are inputted into a computer 9. In the computer 9, front wheel cornering power Cf and rear wheel cornering power Cr are obtained by an operation C1 - an operation C8: where l is a wheel base; (a) is the distance between a front axle and the center of gravity (=Wrdivided by (Wf+Wr)Xl); (b) is the distance between a rear axle and the center of gravity (=l-a); M is the weight of the vehicle [=(Wf+Fr)divided by g]; (g) is acceleration of gravity; I is inertial moment in the direction of yaw; betaf is front wheel slip angle (=S-F/U-agamma/U); betar is rear wheel slip angle (=-V/ U+bgamma/U); V is lateral acceleration; and gamma is yaw angle acceleration. |
