公开(公告)号：US06580988B2

公开(公告)日：2003-06-17

申请号：US09992505

申请日：2001-11-06

申请人： William Chin-Woei Lin ,  Yuen-Kwok Chin ,  Weiwen Deng ,  Scott P. Sherman ,  Paul A. Grougan ,  Eugene A. Rodden

发明人： William Chin-Woei Lin ,  Yuen-Kwok Chin ,  Weiwen Deng ,  Scott P. Sherman ,  Paul A. Grougan ,  Eugene A. Rodden

IPC分类号： B62D504

CPC分类号： B62D7/159

摘要： A method is disclosed for controlling the rear wheel angle in a four-wheel steering vehicle such as a pickup truck. The front wheels are steered using the conventional operator handwheel linked to the front wheels. The rear wheels are actuated with a reversible electric motor and the rear wheel angle controlled using a computer with inputs of vehicle velocity, operator handwheel position and correlated front wheel angle, and handwheel turning rate. Control of rear wheel angle starts with a correlation of ratios of rear wheel angle to front wheel angle, R/F, vs. vehicle velocity suitable, determined under steady state front steering angle and velocity conditions, to maximize the contribution of the rear wheels while avoiding side-slip of the vehicle. It is found that driver steering feel and vehicle maneuverability is improved by imposing a minimum front wheel angle requirement before rear wheel steering is permitted and by modifying the current value of R/F with gain factors base d on the hand wheel angle and rate of motion.

摘要翻译： 公开了一种用于控制诸如皮卡车之类的四轮转向车辆中的后轮角度的方法。 使用与前轮连接的常规操作手轮来转向前轮。 后轮由可逆电动机驱动，后轮角度使用具有车速，操作手轮位置和相关前轮角度以及手轮转速的输入的计算机进行控制。 后轮角度的控制开始于在稳态前转向角和速度条件下确定的后轮角度与前轮角度R / F与适合的车速之比的相关性，以最大化后轮的贡献， 避免车辆侧滑。 发现驾驶员转向感和车辆机动性通过在允许后轮转向之前施加最小前轮角度要求而得到改善，并且通过以手轮角度和运动速度为基础的增益因子d修改R / F的当前值 。

公开(公告)号：US06804592B2

公开(公告)日：2004-10-12

申请号：US09982217

申请日：2001-10-18

申请人： Steven Donald Klein ,  Scott M. Wendling ,  Paul A. Grougan ,  Scott P Sherman ,  Eugene A Rodden ,  Roderick L Lemmer

发明人： Steven Donald Klein ,  Scott M. Wendling ,  Paul A. Grougan ,  Scott P Sherman ,  Eugene A Rodden ,  Roderick L Lemmer

IPC分类号： B62D604

CPC分类号： B62D7/159

摘要： A method directed to improving the stability of a motor vehicle having front and rear steering capabilities includes determining a coefficient of friction of the road surface with which the motor vehicle is engaged and adjusting a phase gain function of a rear steering mechanism to compensate for the steerability of the motor vehicle over the road surface. A system for improving the stability of a motor vehicle having front and rear steering capabilities includes a control unit, a front steering mechanism in informational communication with the control unit, and a rear steering mechanism in informational communication with the control unit. The rear steering mechanism is responsive through the control unit to road conditions of the road surface.

摘要翻译： 旨在提高具有前后转向能力的机动车辆的稳定性的方法包括确定机动车辆所接合的路面的摩擦系数，并且调整后转向机构的相位增益函数以补偿可操纵性 的机动车辆在路面上。 用于改善具有前后转向能力的机动车辆的稳定性的系统包括控制单元，与控制单元进行信息通信的前转向机构，以及与控制单元通信的后转向机构。 后转向机构通过控制单元响应路面的道路状况。